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Couplinator: A simple computational tool for synthesis of multi-section coupled-line filter based on MPCM-TLM technique Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2021-03-04 E. Faghand; S. Karimian; E. Mehrshahi; N. Karimian
A new simple computational tool is proposed for the synthesis of multi-section coupled-line filters based on combined modified planar circuit method (MPCM) and transmission line method (TLM) analysis, referred to as MPCM-TLM. Due to its fundamentally simple architecture, the presented tool offers significantly faster optimization of coupled-line filters – for exactly the same initial simulation set-up
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NB-IoT devices in reverberation chambers: a comprehensive uncertainty analysis Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2021-03-04 Anouk Hubrechsen; Kate A. Remley; Robert D. Jones; Robert D. Horansky; Vincent T. Neylon; Laurens A. Bronckers
New protocols related to Internet-of-things applications may introduce previously unnoticed measurement effects in reverberation chambers (RCs) due to the narrowband nature of these protocols. Such technologies also require less loading to meet the coherence-bandwidth conditions, which may lead to higher variations, hence uncertainties, across the channel. In this work, we extend a previous study of
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Theoretical and experimental investigation of two-layer circular patch antenna excited by a coaxial probe Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2021-03-04 Manotosh Biswas; Mihir Dam; Sourav Banik
In this article, we present two efficient closed-form models to examine thoroughly the dependence of resonant frequency, quality factor, probe reactance, input impedance, bandwidth, and gain on parameters such as patch radius, probe location, substrate electrical parameters, and air gap of a coax probe-fed circular patch antenna. The implementation of these models is very easy and the computation cost
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Eight-shaped polarization-dependent electromagnetic bandgap structure and its application as polarization reflector Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2021-03-03 Priyanka Dalal; Sanjeev Kumar Dhull
In this paper, an eight-shaped polarization-dependent electromagnetic bandgap (ES-PDEBG) structure is proposed. The unit cell of ES-PDEBG structure consists of an outer eight-shaped EBG patch with two inner square patches and three vias. Surface wave bandgap and reflection phase characteristics have been studied for the proposed structure. From the measurement results, two surface wave bandgaps with
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Fully integrated three-way LDMOS Doherty PAs for 1.8–2.2 GHz dual-band and 2.6 GHz m-MIMO 5G applications Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2021-03-01 Marc Vigneau; Mariano Ercoli; Stephan Maroldt
This paper presents a fully integrated three-way Doherty architecture to address the challenges of 5G applications using laterally-diffused metal-oxide semiconductor (LDMOS) technology. By using the so-called CDS cancelation method for the Doherty combiner design, a wideband impedance transformation is achieved, that combined with the three-way Doherty power amplifier (DPA) architecture allows for
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RF Small and large signal characterization of a 3D integrated GaN/RF-SOI SPST switch Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2021-02-24 Frédéric Drillet; Jérôme Loraine; Hassan Saleh; Imene Lahbib; Brice Grandchamp; Lucas Iogna-Prat; Insaf Lahbib; Ousmane Sow; Albert Kumar; Gregory U'Ren
This paper presents the radio frequency (RF) measurements of an SPST switch realized in gallium nitride (GaN)/RF-SOI technology compared to its GaN/silicon (Si) equivalent. The samples are built with an innovative 3D heterogeneous integration technique. The RF switch transistors are GaN-based and the substrate is RF-SOI. The insertion loss obtained is below 0.4 dB up to 30 GHz while being 1 dB lower
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Millimeter-wave dual-mode and dual-band switchable Gilbert up-conversion mixer in 65-nm CMOS process Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2021-02-23 Fang Zhu; Guo Qing Luo
In this paper, a millimeter-wave (MMW) dual-mode and dual-band switchable Gilbert up-conversion mixer in a commercial 65-nm complementary metal oxide semiconductor (CMOS) process is presented. By simply changing the bias, the proposed CMOS Gilbert up-conversion mixer can be switched between subharmonic and fundamental operation modes for MMW dual-band applications. With a low local oscillator pumping
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High isolation 4-element ACS-fed MIMO antenna with band notched feature for UWB communications Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2021-02-22 Ahmed A. Ibrahim; Wael A. E. Ali
In this paper, a compact 4-port band-notched multi-input-multi-output (MIMO) antenna with asymmetric coplanar strip (ACS) feed is presented for ultra-wide band (UWB) applications. The MIMO antenna is comprised of four semi-elliptical radiators with ACS feed for UWB applications and it is printed on inexpensive FR4 substrate of size 48 × 52 mm2 with ɛr = 4.4 and 1.6 mm height. The impedance characteristics
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A 1.5–40 GHz frequency modulated continuous wave radar receiver front-end Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2021-02-18 Mantas Sakalas; Niko Joram; Frank Ellinger
This study presents an ultra-wideband receiver front-end, designed for a reconfigurable frequency modulated continuous wave radar in a 130 nm SiGe BiCMOS technology. A variety of innovative circuit components and design techniques were employed to achieve the ultra-wide bandwidth, low noise figure (NF), good linearity, and circuit ruggedness to high input power levels. The designed front-end is capable
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A compact L-band bandpass filter based on SIR coaxial resonators with high multipactor threshold Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2021-02-17 J. Benedicto; E. Rius; J.-F. Favennec; D. Pacaud; L. Carpentier; J. Puech
This paper presents the design of a sixth-order cross-coupled L-band filter, specifically intended for space applications. The solution was based on the principle of stepped impedance coaxial resonators (SIRs), which allowed us to fulfill several electrical and size specifications and more particularly a high multipactor threshold. The degrees of freedom afforded by the proposed topology offer a wide
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Microwave synthesis of Bessel, Bessel–Gauss, and Gaussian beams: a fully vectorial electromagnetic approach Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2021-02-17 Walter Fuscaldo; Alessio Benedetti; Davide Comite; Paolo Burghignoli; Paolo Baccarelli; Alessandro Galli
Bessel, Bessel-Gauss, and Gaussian beams have widely been investigated in optics in the paraxial approximation, under the frame of a scalar wave theory. Such approximations can hardly be applied in the microwave/millimeter-wave range, where the vectorial nature of the electromagnetic fields cannot be neglected, and experimental realizations for some of these beams appeared only recently. In this work
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High efficient dual band stacked antennas integrated into rescue helmets for indoor communication Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2021-02-15 Hashinur Islam; Saumya Das; Tanushree Bose; Sourav Dhar
A dual-band stacked antenna integrated with a rescue helmet is proposed for WLAN applications. The cross slot aperture feeding technique enables the antenna to support dual-band operation at 2.4 and 5 GHz. On the ground plane, two slots are formed, perpendicular to each other and of different lengths. Four dielectric layers of different permittivity are stacked over this cross slot to attain the desired
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Quad-Band multi-polarized antenna with modified electric-inductive−capacitive resonator Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2021-02-15 Ghanshyam Singh; Binod Kumar Kanaujia; Vijay Kumar Pandey; Sachin Kumar
A compact circularly polarized (CP) patch antenna is presented for modern communication systems. The prospective antenna consists of a microstrip-line inset-fed rectangular patch and a defected ground plane. A rotated rectangular slot and a modified electric-inductive-capacitive (m-ELC) resonator are introduced in the patch and the ground plane to achieve multiband behaviour. A corner of the radiating
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High-gain and broadband SIW cavity-backed slots antenna for X-band applications Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2021-02-11 Dahbi El khamlichi; Naima Amar Touhami; Tajeddin Elhamadi; Mohammed Ali Ennasar
Substrate-integrated waveguide (SIW) technology has recently drawn attention to its benefits in the microwave field, such as integration in planar microwave circuits, low manufacturing cost, and high-quality factor compared to other technologies. In this paper, a broadband and high gain SIW cavity-backed L-shaped slot antenna structure has been designed and made for X-band applications. Three pairs
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Toward a fully integrated automotive radar system-on-chip in 22 nm FD-SOI CMOS Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2021-02-11 Philipp Ritter
Next-generation automotive radar sensors are increasingly becoming sensitive to cost and size, which will leverage monolithically integrated radar system-on-Chips (SoC). This article discusses the challenges and the opportunities of the integration of the millimeter-wave frontend along with the digital backend. A 76–81 GHz radar SoC is presented as an evaluation vehicle for an automotive, fully depleted
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A waveform design method for frequency diverse array systems based on diversity linear chirp waveforms Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2021-02-11 Zhonghan Wang; Yaoliang Song
A frequency diverse array (FDA) radar has attracted wide attention, due to its capability to provide a range-angle dependent beampattern and to scan the spatial without phase shifters or rotating arrays. However, FDA systems will suffer from low echo signal energy or high sidelobe peaks when detecting targets by beamforming based on existing receivers. To reduce the sidelobe peak of detection results
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Applications of metamaterial sensors: a review Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2021-02-02 Divya Prakash; Nisha Gupta
Sensors based on metamaterial absorbers are very promising when it comes to high sensitivity and quality factor, cost, and ease of fabrication. The absorbers could be used to sense physical parameters such as temperature, pressure, density as well as they could be used for determining electromagnetic properties of materials and their characterization. In this work, an attempt has been made to explore
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A compact UWB antenna with dynamically switchable band-notched characteristic using broadband rectenna and DC-DC booster Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2021-02-02 Mohammad M. Fakharian
In this article, a dynamically switchable ultra-wideband (UWB) planar monopole antenna employing defected ground structure (DGS) with a folded stepped impedance resonator (SIR) that can operate as either a UWB mode or the single band-notched mode is introduced. The UWB monopole antenna contains a novel whirligig-shaped radiating patch and a chambered conductor as a partial ground plane. The switchable
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Survey of various bandwidth enhancement techniques used for 5G antennas Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2021-02-02 Tapan Nahar; Sanyog Rawat
Fifth-generation technology is not fully deployed in the world wireless communication till date. Millimeter-wave (mm-wave) band needs to be used due to plenty of available bandwidth and for achieving the goals of 5G such as greater data rate, ultra-high-speed video broadcasting, low latency services, and many more. Wideband antenna is required for 5G applications to access the high speed, low latency
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A wide stopband multilayer substrate integrated waveguide bandpass filter with suppression of higher-order mode coupling Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2021-02-02 Cong Tang; Fei Cheng; Chao Gu
This paper presents a compact multilayer substrate integrated waveguide (SIW) bandpass filter with wide stopband. The square SIW cavity resonators in multilayer substrates are horizontally and vertically coupled with magnetic coupling. By properly designing the coupling structure, the couplings between the higher-order resonant modes can be suppressed. Compared with the conventional single-layer SIW
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Design and analysis of a planar UWB bandpass filter with stopband characteristics using MMR technique Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2021-01-26 Gaurav Saxena; Priyanka Jain; Y. K. Awasthi
In this paper, a ultra-wideband (UWB) bandpass filter with stopband characteristics is presented using a multi-mode resonator (MMR) technique. An MMR is formed by loading three dumbbell-shaped (Mickey and circular) shunt stubs placed in the center and two symmetrical locations from ports, respectively. Three circular and arrowhead defected ground structures on the ground plane are introduced to achieve
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Optimum design of linear and circular antenna arrays using equilibrium optimization algorithm Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2021-01-26 Ali Durmus; Rifat Kurban
In this paper, equilibrium optimization algorithm (EOA), which is a novel optimization algorithm, is applied to synthesize symmetrical linear antenna array and non-uniform circular antenna array (CAA). The main purpose of antenna array synthesis is to achieve a radiation pattern with low maximum side lobe level (MSL) and narrow half-power beam width (HPBW) in far-field. The low MSL here is an important
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A Pythagorean tree fractal shape stub-loaded resonator as a UWB bandpass filter with wide stopband Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2021-01-26 Puja Kumari; Pankaj Sarkar; Rowdra Ghatak
A compact ultrawideband (UWB) bandpass filter (BPF) is designed by harnessing the efficacy of a Pythagorean tree fractal shape stub-loaded resonator. The design inherently provides the passband transmission poles, which make it convenient to be used in wide passband filtering circuits. The number and the position of the resonating modes can be controlled by increasing the iterations of the Pythagorean
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Angle and polarization-independent miniaturized UWB FSS design Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2021-01-08 Yanning Yuan; Yuchen Zhao; Xiaoli Xi
A single-layer ultra-wideband (UWB) stop-band frequency selective surface (FSS) has several advantages in wireless systems, including a simple design, low debugging complexity, and an appropriate thickness. This study proposes a miniaturized UWB stop-band FSS design. The proposed FSS structure consists of a square-loop and metalized vias that are arranged on a single layer substrate; it has an excellent
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Backfire suppressed low profile aperture coupled stacked patch antenna backed by a high impedance surface (HIS) reflector for UHF RFID reader applications Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2021-01-07 Sangkil Kim
In this paper, a backfire suppressed aperture coupled circularly polarized (CP) stacked patch antenna for universal ultra-high frequency (UHF) radio frequency identification applications is presented. Cross-polarized backfire radiation patterns were successfully suppressed by a planar high impedance surface (HIS) reflector. The size of the fabricated antenna is 250 × 250 × 26.9 mm3 (0.71λ0 × 0.71λ0
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Four-element MIMO antenna for X-band applications Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2021-01-07 Ali Eslami; Javad Nourinia; Changiz Ghobadi; Majid Shokri
This study presents a new design of a four-element multiple-input multiple-output (MIMO) antenna, which is suitable for X-band applications. The circular polarization (CP) operation in this work is attained by using Tai Chi-shaped patches and L-shaped feeds. The proposed four-element MIMO antenna achieves two resonant frequencies, the first one at around 7.75 GHz and the second one with CP radiation
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Toroidal dipole excitation in cylindrically arranged dogbone metallic inclusions Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2021-01-07 V. P. Sarin; P. V. Vinesh; M. Manoj; C. K. Aanandan; P. Mohanan; K. Vasudevan
A significant excitation of toroidal moments in cylindrically arranged dogbone metallic inclusions is validated and presented in this paper. The antiparallel poloidal currents excited on the front and back faces of the proposed cylindrical dogbone inclusions create strong magnetic field confinement at the center generating intense toroidal moments on the structure. The significant excitation of toroidal
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Design and analysis of 4 × 4 MIMO antenna with DGS for WLAN applications Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2020-12-22 K. Malaisamy; M. Santhi; S. Robinson
In this paper, a low profile 4 × 4 multiple input and multiple output (MIMO) antenna is proposed and designed for wireless local area network (WLAN) application using a square split-ring resonator. Initially, a single square-patch antenna is designed with square-shaped split-ring slot. Subsequently, the two-element MIMO antenna is designed and it is extended to four-element MIMO antenna. Finally, the
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Wide-band gain enhancement of a pyramidal horn antenna with a 3D-printed epsilon-positive and epsilon-near-zero metamaterial lens Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2020-12-18 Nesem Keskin; Sinan Aksimsek; Nurhan Turker Tokan
In this article, we present a simple, low-cost solution for the gain enhancement of a conventional pyramidal horn antenna using additive manufacturing. A flat, metamaterial lens consisting of three-layer metallic grid wire is implemented at the aperture of the horn. The lens is separated into two regions; namely epsilon-positive and epsilon-near-zero (ENZ) regions. The structure of the ENZ region is
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Design of elliptical-shaped reconfigurable patch antenna with shunt capacitive RF-MEMS switch for satellite applications Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2020-12-17 Bokkisam Venkata Sai Sailaja; Ketavath Kumar Naik
In this paper, non-uniform meandered line shunt capacitive RF-MEMS switch is presented at an elliptical patch etched with a split-ring resonator (SRR) for satellite communication applications. The non-uniform meander line shunt capacitive is a fixed-fixed type of RF-MEMS switch that is introduced in this model antenna. The proposed antenna design is resonated at 10.46 GHz with the return loss of −37
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5G beamforming techniques for the coverage of intended directions in modern wireless communication: in-depth review Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2020-12-15 Leevanshi Rao; Mohit Pant; Leeladhar Malviya; Ajay Parmar; Sandhya Vijay Charhate
The growing need of the compact and portable antennas with high speed and low latency wireless communication is the present and future demand of the voice over Internet protocol, on-demand bandwidth, and multimedia applications. Fifth-generation (5G) covers certain low-frequency bands under 6 GHz spectrum, and most of the high-frequency bands under 60 GHz. 5G is the part of the millimeter wave spectrum
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AMC-based antenna sensor for breast tumors detection Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2020-12-09 Praveen Kumar Rao; Ashish Ranjan Yadav; Rajan Mishra
The artificial magnetic conductor (AMC) formed by meta-materials is used in the micro-strip antenna design for microwave sensor applications. The AMC structures with two uniplanar layers, which include modified square split-ring resonator cells, are repeated and formed into a 5 × 3 array. The antenna's operational bandwidth result is significant, and it is in the range of 2.8–10 GHz with a maximum
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A compact UWB antenna with triple band notch reconfigurability Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2020-12-07 Lei Li; Jingchang Nan; Jing Liu; Chengjian Tao
A compact ultrawideband (UWB) antenna with reconfigurable triple band notch characteristics is proposed in this paper. The antenna consists of a coplanar waveguide-fed top-cut circular-shaped radiator with two etched C-shaped slots, a pair of split-ring resonators (SRRs) on the backside and four p-type intrinsic n-type (PIN) diodes integrated in the slots and SRRs. By controlling the current distribution
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Modified Koch curve broadband fractal antenna for spectrum sensing in cognitive radio Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2020-12-03 Monika Aggarwal; Amar Partap Singh Pharwaha
This paper presents the design and development of broadband modified Koch curve microstrip patch antenna with multiband characteristics for spectrum sensing in cognitive radio applications. The proposed spectrum sensing antenna is designed specifically for its efficient operation in the spectrum (1.683–3.05, 4.246–9.714, and 11.25–18 GHz) specified for L, S, C, X, Ku with broadband characteristics
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Radiation characteristics of microstrip antenna on frequency selective surface absorbing layer Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2020-12-03 Ashish Raj; Nisha Gupta
The radiation characteristics of the microstrip antenna (MSA) on the frequency selective surface (FSS) based absorbing layer is presented in this paper. It is observed that an absorbing layer placed between the MSA configuration and the ground plane helps in controlling the radiation characteristics of the antenna. It not only reduces the back lobe but also reduces the beamwidth and gain of the antenna
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A compact polarization reconfigurable stacked microstrip antenna for WiMAX application Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2020-11-27 Murari Shaw; Niranjan Mandal; Malay Gangopadhyay
In this paper, a stacked microstrip patch antenna with polarization reconfigurable property has been proposed for worldwide interoperability for microwave access (WiMAX) application. The proposed antenna has two substrate layers: upper and lower layers with two radiating patches connected with the coaxial probe. Without the upper layer the lower square-shaped substrate layer having regular hexagonal
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Compact wideband folded strip monopole antenna for brain stroke detection Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2020-11-27 Payal Bhardwaj; Ritesh Kumar Badhai
This paper introduces the CPW fed monopole antenna operating at multiple frequencies covering Ultra High Frequency (UHF) bands, suitable for biomedical applications. The planar antenna structure comprises an open loop and a dual folded monopole of optimized length. The antenna exhibits ultra-wideband frequency of operation ranges from 740 MHz to 4.02 GHz covering the frequency bands suitable for head
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Study of effective permittivity for a multilayer substrate dipole antenna Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2020-11-27 Julien Moussa H. Barakat; Fabien Ndagijimana
The design of integrated systems requires the knowledge of the values of the effective permittivity of the substrate. Designing antenna using computer-aided design tools is a long process that necessitates doing iterative steps to find the correct dimensions that meet specific requirements at a certain operating frequency. The objective of this work is to propose an analytic model to reduce the time
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A miniaturized flexible frequency selective surface for dual band response Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2020-11-26 Durai Kanchana; Sankararajan Radha; Balakrishnapillai Suseela Sreeja; Esakkimuthu Manikandan
In this paper, a novel miniaturized and flexible dual band frequency selective surface (FSS) is presented. This FSS provides effective shielding in X-band and Ku- band, with a frequency response of 9.4 and 16.7 GHz, respectively. The proposed FSS provides 924 MHz bandwidth at X-band and 1.34 GHz bandwidth at Ku-band with an insertion loss of 20 dB. Moreover, the proposed design is polarization-independent
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A superstrate loaded aperture coupled dual-band circularly polarized dielectric resonator antenna for X-band communications Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2020-11-26 Sounik Kiran Kumar Dash; Qingsha S. Cheng; Taimoor Khan
A superstrate loaded cylindrical dielectric resonator antenna is developed and demonstrated for dual-band circular polarization. The proposed antenna employs a microstrip-fed rotated cross-shaped slot coupling technique for exciting the dielectric resonator (DR). The design is developed in a straight forward way. Firstly, the DR is coupled with a conventional plus-shaped slot and operates in linear
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Investigation of organic corn husk-based flat microwave absorber Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2020-11-23 Soumya Sundar Pattanayak; Shahedul Haque Laskar; Swagatadeb Sahoo
Design and development of cheap and eco-friendly microwave absorber are one of the challenging and interesting topics for the scientific community nowadays. This paper proposes the design and fabrication of corn husk-based low cost, light-weight, and flexible microwave absorber treated as a promising eco-friendly microwave absorber. In this work, an extensive study on microwave absorption efficiency
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A new path loss model based on the volumetric occupancy rate for the pine forests at 5G frequency band Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2020-11-20 Abdullah Genc
In this paper, a new empirical path loss model based on frequency, distance, and volumetric occupancy rate is generated at the 3.5 and 4.2 GHz in the scope of 5G frequency bands. This study aims to determine the effect of the volumetric occupancy rate on path loss depending on the foliage density of the trees in the pine forest area. Using 4.2 GHz and the effect of the volumetric occupancy rate contributes
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Determining the input reflection coefficient of integrated antennas using over-the-air measurements under near-field conditions Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2020-11-19 A.J. van den Biggelaar; D.P.P. Daverveld; A.C.F. Reniers; A.B. Smolders; U. Johannsen
One of the current trends in the integrated circuit (IC) development is the integration of antennas on-chip or in the package of the IC. This poses challenges in the production testing process of the packaged IC, as the antenna functionality has to be included and at least one of the signal ports cannot be accessed at a conducted manner. In order to measure the reflection coefficient of an integrated
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Low-loss and tunable millimeter-wave filters using spherical dielectric resonators Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2020-11-19 Utpal Dey; Julio Gonzalez Marin; Jan Hesselbarth
Millimeter-wave band-pass filters using spherical dielectric resonators are presented. The dielectric spheres are sandwiched between metal plates and are excited by a simple microstrip line structure on a thin-film circuit board. As such, these filters could also be implemented in the back-end-of-line layers of an integrated circuit. A single resonator, based on a diameter 0.6 mm alumina ceramic sphere
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Compact stack EBG structure for enhanced isolation between stack patch antenna array elements for MIMO application Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2020-11-18 Mahesh B. Kadu; Neela Rayavarapu
In this research article, a compact wideband stack patch antenna array integrated with compact stack electromagnetic band gap (EBG) structure for multiple input multiple output (MIMO) application is proposed. The wide resonance bandwidth is achieved at 2.45 GHz band by stack arrangement of compact meander line slot driven and parasitic patch elements. The isolation bandwidth is matched with resonance
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Dual-/tri-band bandpass filters with fully independent and controllable passband based on multipath-embedded resonators Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2020-09-30 Yang Xiong; Wei Zhang; Yue-Peng Zhong; Li-Tian Wang
In this paper, dual-band and tri-band bandpass filters (BPFs) with fully independent and controllable passbands based on multipath-embedded resonators are presented. The dual-band BPF consists of two double open-ended stub-loaded terminal-shorted resonators (DOESL-TSRs) with a common via-hole connected along the symmetric plane of the filter. Based on DOESL-TSRs, a triple open-ended stub-loaded terminal-shorted
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Planar suspended line technique based UWB-MIMO antenna having dual-band notching characteristics Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2020-11-09 Kirti Vyas; Rajendra Prasad Yadav
This communication reports significant isolation improvement utilizing planar suspended line (PSL) technique in ultra wideband (UWB) antenna for Multiple Input Multiple Output (MIMO) application. The antenna exhibits dual-band notched characteristic in Wireless Local Area Network (WLAN) band covering 5.45–5.85 GHz range; and in 7.15–7.95 GHz range for X-band downlink operations in satellite communication
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Synthesis technique of a low-profile multiple sub-beam phased array antenna for high-throughput satellite applications Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2020-11-06 Elham Sharifi Moghaddam; Arash Ahmadi
Sub-beam concept is very useful for size reduction of multiple beam phased array antenna (PAA) systems that are applied for high-throughput communication satellites. In this paper, the synthesis procedure for a PAA with multiple sub-beams in two dimensions of the coverage domain is proposed and analyzed. In the design procedure, the interleaved sub-arraying technique has been applied to eliminate the
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A novel design of ultra-wide stop-band single-layer frequency selective surface using square-loop and cross Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2020-11-04 Amit Birwal; Sanjeev Singh; Binod Kumar Kanaujia
In this paper, a novel design of ultra-wide stop-band single-side single-layer frequency selective surface (FSS) is presented. The unit cell of the proposed FSS is designed using the combination of conventional square loop and cross (CSLC). To enhance the bandwidth of this structure, an additional cross is inserted in all the four quadrants of CSLC. The stop-band transmission bandwidth assuming −10
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Vivaldi antennas: a historical review and current state of art Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2020-10-21 Anindita Bhattacharjee; Abhirup Bhawal; Anirban Karmakar; Anuradha Saha; Diptendu Bhattacharya
The progressions in the field of wireless technology can be highly attributed to the development of antennas, which can access high data rates, provide significant gain and uniform radiation characteristics. One such antenna called the Vivaldi antenna has attracted the utmost attention of the researchers owing to its high gain, wide bandwidth, low cross-polarization, and stable radiation characteristics
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A compact band-notched antenna with high isolation for UWB MIMO applications Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2020-10-20 Issmat Shah Masoodi; Insha Ishteyaq; Khalid Muzaffar; M. Idrees Magray
A compact antenna module with a single band notch at wireless local area network (WLAN) (5.725–5.825 GHz) for ultra-wideband (UWB) multiple input multiple output (MIMO) applications is proposed. Proposed antenna which acquires size of 0.299 λ × 0.413 λ × 0.005 λ mm3 at 3.1 GHz consists of two symmetrical radiators placed side by side on global merchandise link (GML) 1000 substrate (εr = 3.2, tan δ
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Dual-band B-shaped antenna array for satellite applications Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2020-10-19 Muhammad Mateen Hassan; Muzhair Hussain; Adnan Ahmed Khan; Imran Rashid; Farooq Ahmed Bhatti
The paper presents a 1 × 2 B-shaped antenna array for dual-band operation at 4 and 8 GHz. The antenna design consists of a rectangular patch with two annular-strip lines fabricated on the top layer and finite ground plane on the bottom layer. The array is formed by designing an optimum T-shaped microstrip line for impedance matching. The dimensions of the antenna array are 78 × 36 × 1.6 mm3. Full-wave
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Graphene-based microwave coaxial antenna for microwave ablation: thermal analysis Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2020-10-19 Burak Uzman; Adem Yilmaz; Hulusi Acikgoz; Raj Mittra
In this study, the problem of backward heating in microwave ablation technique is examined and an electromagnetic solution based on the use of high impedance graphene material is presented for its mitigation. In this context, a one-atom-thick graphene layer is added on the coaxial double slot antenna. In addition to the electromagnetic behavior, thermal effects caused by the graphene-covered antenna
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Employing higher order modes in a broadband SIW sensor for permittivity measurement of medium loss materials Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2020-10-14 Kianoosh Kazemi; Gholamreza Moradi; Ayaz Ghorbani
In this paper, a novel SIW microwave sensor is designed to accurately determine the broadband complex permittivity of medium loss and dispersive liquids using a number of higher order modes in 11–20 GHz. To achieve a higher accuracy in characterization, the sensor is equipped with some methods such as Photonic Band Gap method, slow-wave via, and a new feedline, which enhances the quality factor for
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A fully-textile wideband AMC-backed antenna for wristband WiMAX and medical applications Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2020-10-14 Mohamed El Atrash; Mahmoud A. Abdalla; Hadia M. Elhennawy
Proposed is a wideband, low profile, fully flexible, and all-textile-based slotted triangular antenna loaded with a 2 × 2 textile-inspired artificial magnetic conductor to be worn on the wrist. The integrated antenna design is designed to cover the frequency band from 3.1 to 6.5 GHz. The integrated design has two main resonances, where the first one is at 3.5 GHz, which can serve the WiMAX communication
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Machine learning-based broadband GaN HEMT behavioral model applied to class-J power amplifier design Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2020-10-14 Jialin Cai; Justin King; Shichang Chen; Meilin Wu; Jiangtao Su; Jianhua Wang
A novel, broadband, nonlinear behavioral model, based on support vector regression (SVR) is presented in this paper. The proposed model, distinct from existing SVR-based models, incorporates frequency information into its formalism, allowing the model to perform accurate prediction across a wide frequency band. The basic theory of the proposed model, along with model implementation and the model extraction
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Compact quintuple notched-band UWB BPF with high selectivity and wide bandwidth Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2020-10-12 Lei Bai; Yiqi Zhuang; Zhibin Zeng
In this paper, a compact quintuple notched-band ultra-wideband bandpass filter with high selectivity and wide bandwidth is proposed. The filter adopts an approximate closed-loop C-shaped stepped impedance resonator to generate triple notched bands, and uses Hilbert fractal curve slit and L-shaped resonator to create single notched band, respectively. Multiple notched-band are centered at 5.29, 6.61
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Compact multimode-resonator multiplexer with wide upper-stopband and high isolation Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2020-09-30 Kaijun Song; Mou Luo; Cuilin Zhong; Yuxuan Chen; Yedi Zhou; Fei Xia
A miniaturized high-isolation quadplexer with wide upper-stopband based on open and short stub-loaded multimode-resonator is proposed in this paper. Based on the theory of multimode-resonator and stepped impedance resonator (SIR), the compact quadplexer is designed by using multimode-resonator and SIR. In order to further miniaturize the size of the circuit, the multimode resonator is employed as the
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A multi-slotted antenna for LTE/5G Sub-6 GHz wireless communication applications Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2020-09-29 Rezaul Azim; AKM Moinul H. Meaze; Adnan Affandi; Md Mottahir Alam; Rumi Aktar; Md S. Mia; Touhidul Alam; Md Samsuzzaman; Mohammad T. Islam
This paper presents a low-profile multi-slotted patch antenna for long term evolution (LTE) and fifth-generation (5G) communication applications. The studied antenna comprised of a stepped patch and a ground plane. To attain the required operating band, three slots have been inserted within the patch. The insertion of the slots enhances the capacitive effect and helps the prototype antenna to achieve
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A miniaturized tri-band bandpass microstrip filter using multiple resonators with sharp skirts Int. J. Microw. Wirel. Technol. (IF 0.939) Pub Date : 2020-09-24 Chenhao Wang; Xiaoli Xi; Yuchen Zhao; Xiaomin Shi
In this paper, a miniaturized tri-band bandpass microstrip filter using stub loaded rectangular ring resonator (SLRRR),shorted stub loaded stepped impedance resonators (SSLSIR), and stepped impedance resonators (SIR) with sharp skirts is presented. Two SSLSIRs are embedded paralleled inside SLRRR to generate a quasi-elliptic response at second and third passband. The odd-even fundamental resonant mode