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3-D printed CDRA for radiation beam reconfigurability and beamforming in C-band Frequenz (IF 0.543) Pub Date : 2021-01-21 Maganti Apparao; Godi Karunakar
In this article, the design of a radiation beam-reconfigurable antenna using the reflector pins is presented. The reflector pins make a short or open connection with the ground, via switches and Plated Through Hole (PTH), which helps in controlling radiation characteristics of the proposed antenna. This design contains a simple 3D printed Cylindrical Dielectric Resonator Antenna that is located at
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Compact cross-shaped parasitic strip based multiple-input multiple-output (MIMO) dielectric resonator antenna for ultra-wideband (UWB) applications Frequenz (IF 0.543) Pub Date : 2021-01-18 Sachin Kumar Yadav; Amanpreet Kaur; Rajesh Khanna
In this article, cross-shaped metallic parasitic strips based two radiator element multiple-input multiple-output (MIMO) dielectric resonator antenna (DRA) is excited by quadrature wave transformer microstrip feedline, designed, simulated and fabricated for ultra-wideband (UWB) applications. The proposed MIMO antenna structure is implemented with the help of two rectangular-shaped radiator elements
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Optical spherical dielectric resonator antenna for sensing and wireless communication Frequenz (IF 0.543) Pub Date : 2020-11-19 Rajveer S. Yaduvanshi; Rama Krishna Yadav; Saurabh Katiyar; Suresh Kumar; Harish Parthasarathy
In this article, Terahertz spherical dielectric resonator antenna (DRA) is mathematically formulated and simulated at 511 THz for LiDAR and retinal photoreceptor applications. Titanate DR element is used at optical design frequency. It is validated with good S11, radiation pattern and 5.6 dBi gain plots using HFSS simulator. Unique mathematical formulation on super directivity and radiated states is
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Frontmatter Frequenz (IF 0.543) Pub Date : 2021-01-12
Journal Name: Frequenz Volume: 75 Issue: 1-2 Pages: i-iii
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Broadband gain enhancement of an UWB antenna using conformal wideband NRI metamaterial Frequenz (IF 0.543) Pub Date : 2020-12-18 Deepa Negi; Rajesh Khanna; Jaswinder Kaur
In this article, broadband gain enhancement of an ultra-wide band (UWB) antenna is achieved by using 4 × 4 array of a wideband negative refractive index (NRI) metamaterial as a reflector layer. A novel shaped metamaterial sized 14.8 × 14.8 mm2 with double negative (DNG) characteristics in three frequency regions has been fabricated on a flexible FR4 with 0.25 mm thickness. The proposed metamaterial
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Non-invasive detection and discrimination of breast tumors at early stage using spiral antenna Frequenz (IF 0.543) Pub Date : 2020-12-08 Rukmani Singh; Vishnu Priye
In this paper, an Archimedean spiral antenna-based biosensor has been proposed for the early detection of breast tumor. By monitoring the variation of S11 over 1–3.5 GHz frequency range, the proposed scheme can identify the tumor location, as well as distinguish the types of tumor (benign or malignant) based on shapes and dielectric properties contrast. To validate the concept, full wave simulation
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A hybrid reconfigurability structure for a novel 5G monopole antenna for future mobile communication Frequenz (IF 0.543) Pub Date : 2020-12-08 Muhammad Kamran Shereen; Muhammad Irfan Khattak; Mua’th Al-Hasan
A novel printed and compact profile monopole antenna with hybrid reconfigurability structure for switching the resonant frequency and direction of maximum radiations is proposed in this research work. A novel mathematical model for the architecture of Reconfigurable Patch Antenna (RPA), considering input impedance, bandwidth, antenna gain, antenna efficiency and resonant frequency is proposed. For
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Dual circular slot ring triple-band MIMO antenna for 5G applications Frequenz (IF 0.543) Pub Date : 2020-12-11 Anand Kumar; Santosh Kumar Mahto; Rashmi Sinha; Arvind Choubey
A Triple-band Multiple-Input-Multiple-Output (MIMO) antenna for 5G mobile terminal applications is proposed in this paper. The design comprises four-port/two resonators, each having two concentric circular slot ring radiators etched on a ground plane of size 50 mm × 50 mm. The antenna is fed by perpendicularly arranged 50 Ω microstrip line feeds on the top layer. Decoupling techniques were used to
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Conical dielectric resonator antenna for terahertz applications Frequenz (IF 0.543) Pub Date : 2020-11-23 Rajveer S. Yaduvanshi; MSIT Nishtha
Conical Terahertz DRA (dielectric resonator antenna) have been designed and investigated at terahertz spectrum i.e. 10 THz. Lower terahertz frequency band is useful for high data speed communication and upper band is used for optical sensors and free space wireless communications. Novelty in this work is to open up research in. terahertz. A unique geometry based dual band terahertz DRA with mathematical
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Wear-level-monitoring on electrical conductors with high-frequency alternating currents Frequenz (IF 0.543) Pub Date : 2020-11-16 Philipp Lenz; Armin Wittmann; Georg Fischer
In this paper, a methodical approach for the in-situ monitoring of the mechanical wear of electrical conductors is presented. The state of life can be assessed by means of the characteristic attenuation of an applied high-frequency alternating current. The advantages of this approach include its non-destructive nature and the applicability to installed and otherwise inaccessible conductors.
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Electrical equivalent circuit modelling of various fractal inspired UWB Antennas Frequenz (IF 0.543) Pub Date : 2020-11-13 Balaka Biswas; Ayan Karmakar
This paper presents electrical equivalent circuit modelling of various fractal-based UWB antennas. Three different designs have been discussed here as case studies, whose characteristics are diversified in nature. Even the implemented fractal geometries are also unique in nature for these antenna problems. An easy circuit model for each antenna structure is proposed which deciphers the insight device
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Highly efficient artificial magnetic conductor enabled CPW fed compact antenna for BAN wearable applications Frequenz (IF 0.543) Pub Date : 2020-11-10 Maksud Alam; Amber Khan; Mainuddin; Binod Kumar Kanaujia; Mirza Tariq Beg
In this paper a coplanar waveguide feed (CPW) monopole antenna backed with artificial magnetic conductor (AMC) structure for efficient radiation has been presented for off-body wearable applications. A split ring resonator (SRR) having thiner and longer lines to produce higher inductance and six splits with smaller gaps for high capacitance have been placed underneath CPW fed monopole to achieve resonance
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A balanced-to-balanced directional coupler based on branch-slotline coupled structure Frequenz (IF 0.543) Pub Date : 2020-09-01 Yaxin Liu; Feng Wei; Xiaowei Shi; Cao Zeng
In this paper, a balanced-to-balanced (BTB) branch-slotline directional coupler (DC) is firstly presented, which can realize an arbitrary power division ratios (PDRs). The coupler is composed by microstrip-to-slotline (MS) transition structures and branch-slotline coupled structures. The single-ended to balanced-ended conversion is simplified and easy to implemented by the MS transition structures
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A metamaterial loaded hybrid fractal multiband antenna for wireless applications with frequency band reconfigurability characteristics Frequenz (IF 0.543) Pub Date : 2020-09-18 Ritesh Kumar Saraswat; Mithilesh Kumar
In the present article authors propose the design and analysis of an octagonal shape multiband metamaterial loaded antenna with implementation of hybrid fractal geometry for wireless applications. Multiband features in the antenna structure is realized by applying the slotted and hybrid fractalization of Moore and Koch curve approach in radiating section along with introduction of two metamaterial
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Smart DRA for beam width and orientation control Frequenz (IF 0.543) Pub Date : 2020-09-07 Rajveer S. Yaduvanshi; Richa Gupta; Saurabh Katiyar
Smartdielectric resonator antenna (DRA) having beam control mechanism is anew area to be explored by antenna researchers. Proposed new geometry DRA has low loss, design flexibility, high efficiency, compact size and desired radiated beam control. Developing beam control in new geometry DRAs is investigated for the first time in this letter. Unique technique for beam control and beam width control is
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Scanning rate enhancement in substrate integrated waveguide periodic leaky wave antenna with continuous beam scanning using delay lines Frequenz (IF 0.543) Pub Date : 2020-09-18 Dhruv Chaudhary; Rahul Agrawal; Suresh C. Gupta
In this paper, the scanning rate (SR) is enhanced for substrate integrated waveguide (SIW) based periodic leaky wave antenna (LWA) with continuous beam scanning. Delay line is inserted in the SIW based periodic LWA to modify the group delay profile which in turn increase the SR of the SIW based periodic LWA. Addition of the delay line enhances the SR of the SIW LWA to approximately three times from
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Frontmatter Frequenz (IF 0.543) Pub Date : 2020-11-02
Journal Name: Frequenz Volume: 74 Issue: 11-12 Pages: i-iii
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Inverted E shaped dipole antenna with corrugated substrate for mm-wave applications Frequenz (IF 0.543) Pub Date : 2020-10-16 Paikhomba Loktongbam; Chaitali Koley; Debasish Pal; Ayan Kumar Bandyopadhyay
This paper presents a novel E armed dipole antenna for System On Chip (SOC) applications in the Sub-THz frequency band. The antenna is printed on a corrugated silicon substrate which suppresses surface waves and provides high efficiency and gain. The corrugated substrate also provides a better impedance matching. The antenna has a simulated gain of 5.4 dBi and 3 dB beam-width of 83.5 degree. The proposed
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Microstrip coupled high sensitivity sensor for water ethanol mixture characterization Frequenz (IF 0.543) Pub Date : 2020-10-14 Zakarya Hafdi; Junwu Tao; Abdelhafid Chaabi
A multi spiral split ring resonator based sensor is proposed for the characterization of the dielectric properties of a water ethanol mixture. The use of a narrowed microstrip line to excite the multi spiral resonator allows enhancement of excitation current and increase the sensitivity of the sensing area. Good agreement will be presented between theoretical and measured electrical parameters of the
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Performance evaluation of AF-relayed mixed FSO/mm-wave-RF link modeled by generalized misalignment and RF fading distributions Frequenz (IF 0.543) Pub Date : 2020-10-07 Himanshu Khanna
The performance of a generalized mixed free-space-optical (FSO)/millimeter (mm)-wave radio-frequency (RF) two-hop link model is investigated in this work. The first-hop FSO channel considers the influence of path loss, atmospheric turbulence which is modeled by the gamma–gamma (GG)-distribution, and generalized misalignment errors which incorporate the effects of non-zero boresight errors, different
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Performance enhancement of circularly polarized patch antenna using slotted circular EBG-based metasurface Frequenz (IF 0.543) Pub Date : 2020-10-06 Alka Verma; Anil Kumar Singh; Neelam Srivastava; Shilpee Patil; Binod Kumar Kanaujia
A 3 × 3 slotted circular Electromagnetic Band gap based Metasurface (SCEBG-MS) has been presented in this article, which enhances the performance of a circularly polarized (CP) patch antenna by improving its impedance bandwidth, axial ratio bandwidth and gain. The proposed antenna is having a low profile of 0.065 λo (λo is the free-space wavelength at center frequency of 6.16 GHz) with ground size
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Design of an aperture coupled MIMO antenna for on-body communication and performance enhancement with dielectric back reflector Frequenz (IF 0.543) Pub Date : 2020-09-30 Vipan Kumar Gupta; Ashima Gupta
Compact antennas with robust on-body performance are achieving more interest for wearable sensor nodes. In this paper, a modified aperture coupled multiple input multiple output (MIMO) antenna operating at 2.45 GHz industrial scientific and medical (ISM) band is presented for wearable devices. 8-shaped radiator with L-shaped ground slot is used to miniaturize the antenna dimensions. A dielectric reflector
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A low profile miniaturized circular microstrip patch antenna for dual-band application Frequenz (IF 0.543) Pub Date : 2020-07-26 Murari Shaw; Niranjan Mandal; Malay Gangopadhyay
A low profile Circular Microstrip Patch Antenna (CMPA) with radius 5 mm has been designed to generate two resonant frequency bands that can be used for WLAN 5.2 (5.15–5.25) GHz, Wi-Fi (5.725–5.850) GHz and Dedicated Short-Range Communications (DSRC) (5.85–5.925) GHz application bands. The designed antenna has been slitted with two slits and a stub has also been attached resulting in an additional resonant
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A modified rhombus shaped flexible wideband double negative (DNG) metamaterial for S, C, X, and Ku band applications Frequenz (IF 0.543) Pub Date : 2020-07-27 Deepa Negi; Rajesh Khanna; Jaswinder Kaur
In this paper a wideband, flexible, and novel structured double negative (DNG) metamaterial is designed for S, C, X, and Ku microwave applications. The 12 mm × 12 mm sized metamaterial is fabricated on a flexible FR4 substrate with thickness 0.25 mm. The metamaterial shows a total wide DNG region of 8.2 GHz (3.8–4.3 GHz and 6.8–14.5 GHz). The transmission coefficient of the unit cell has a total band
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Design of 89/118/166/183 GHz frequency dividing network for microsatellite application Frequenz (IF 0.543) Pub Date : 2020-07-27 Jin Meng; Jing Wang; Dehai Zhang; Shengwei Zhang; Changhong Jiang; Guangyu Ji
Miniaturizing the microwave circuits for micro-satellite platform has been one of the development trends in microwave remote sensing. A novel 89/118/166/183 GHz frequency dividing network is proposed in this paper which includes two stages: the first stage is an F-G band diplexer that separate 89/118 GHz signals from 166/183 GHz signals. The measured typical transmission loss is 1.5 dB from 83.75 to
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High contrast ratio for full-designs optical logic gates based on photonic crystal ring resonator Frequenz (IF 0.543) Pub Date : 2020-08-10 Mohamed Salah Bouaouina; Mohamed Redha Lebbal; Touraya Bouchemat; Mohamed Bouchemat
The all-optical logic gates have become an important key enabling in optical integrated circuits and find applications in optical networks. In this paper, we introduce new complete series of optical logic gates using photonic crystals. These designs formed by compilation with interference based defect and resonance phenomenon. The proposed work based on two dimensional square lattices by putting gallium
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Frontmatter Frequenz (IF 0.543) Pub Date : 2020-09-16
Journal Name: Frequenz Volume: 74 Issue: 9-10 Pages: i-iii
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Design of low profile co-axial fed high gain stacked patch antenna for Wi-Fi/WLAN/Wi-Max applications Frequenz (IF 0.543) Pub Date : 2020-09-02 Gnanasivam Pachaiyappan; Parthasarathy Ramanujam
In this article, a simple design of stacked radiating system with enhanced gain, impedance bandwidth, and radiation efficiency for mobile base station application is presented. The proposed antenna consists of a driven patch with a semicircular parasitic patch printed on the bottom layer and five parasitic patches printed on the top layer. The driven patch is feed by a co-axial probe and both the layers
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A concurrent dual-band radar sensor for vital sign tracking and short-range positioning Frequenz (IF 0.543) Pub Date : 2020-08-19 Zi-Kai Yang; Wen-Kui Liu; Sheng Zhao; Xiang-Dong Huang
This paper presents a concurrent dual-band radar system for noncontact tracking of vital signs (e.g., respiration and heartbeat), and indoor short-range localization. The proposed sensor, which has been achieved with our own customized concurrent dual-band subsystems, operates at 1.67 and 2.06 GHz synchronously. Based on the Doppler principle, tiny vital signs are obtained by analysis of spectrum of
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Investigation on two dimensional photonic crystal based two/three input all optical AND gate Frequenz (IF 0.543) Pub Date : 2020-08-19 K. Rama Prabha; R. Arunkumar; S. Robinson
In this paper the design and analysis of two dimensional photonic crystals based all optical AND logic gate is investigated. A logic gate implements a Boolean function and thus performs a logical operation on one or several logic inputs in order to produce a single logic input. The proposed all optical AND gate is designed with line and point defect using a hexagonal lattice with “Y” shaped defect
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An improved technique for low-loss material complex permittivity and permeability determination from transmission-only measurements Frequenz (IF 0.543) Pub Date : 2020-08-10 Chuang Yang; Jian Wang; Feng Feng
In this paper, a novel technique based on transmission-only measurements is proposed to determine complex permittivity and permeability of low-loss materials. The proposed method removes the influences of the sample thickness and avoids the resonances in the extracted parameters. Both the experiment and simulation are applied to present the advantages of the proposed method. Compared with the well-known
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Multiband planar antenna with CSRR loaded ground plane for WLAN and fixed satellite service applications Frequenz (IF 0.543) Pub Date : 2020-08-10 Debasish Pal; Rahul Singhal; Abhishek Joshi; Ayan Kumar Bandyopadhyay
In this paper, a novel approach to achieve multiband antenna operation using metamaterial based resonant structures is presented. Multiband antenna operation is achieved by employment of complementary split ring resonators (CSRR) printed in the ground plane. The CSRRs resonate at different frequencies according to their optimized dimensions. Proposed approach features simple design and fabrication
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Multimode T-junctions based on truncated Eaton lens Frequenz (IF 0.543) Pub Date : 2020-05-27 Seyed Hadi Badri; Mohsen Mohammadzadeh Gilarlue
Mode-division multiplexing (MDM) in silicon-on-insulator platform is an emerging technology to increase the channel number of a single wavelength carrier by the number of modes and consequently increase the transmission capacity of on-chip optical interconnects. We propose and theoretically demonstrate a multimode branching structure based on the truncated Eaton lens. The proposed T-junctions efficiently
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Half mode substrate integrated waveguide based leaky wave antenna with low cross polarisation Frequenz (IF 0.543) Pub Date : 2020-05-27 Pravesh Belwal; Rahul Agrawal; Suresh Chandra Gupta
A half mode substrate integrated waveguide (HMSIW) based leaky wave antenna (LWA) featuring low cross-polarization is proposed in this paper. The umbrella-shaped slot (the combination of longitudinal and transverse slots) is etched on the top layer of HMSIW LWA to get the efficient broadside radiation. The scanning range is obtained from −47° to +30° in a frequency range of 8.3 to 15.1 GHz. The cross-polarization
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Design and development of cross dipole antenna for satellite applications Frequenz (IF 0.543) Pub Date : 2020-05-22 Malaisamy K; Santhi M; Robinson S; Mohd Wasim; Murugapandiyan P
In this paper, a cross dipole antenna is proposed, designed, and developed for satellite communication applications. The design incorporates an alternative feeding mechanism of the coaxial/probe feeding technique with balun. The primary objective of this paper is to develop the high gain antenna with an array configuration for satellite communication. The performance parameters of an antenna such as
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Frontmatter Frequenz (IF 0.543) Pub Date : 2020-07-21
Journal Name: Frequenz Volume: 74 Issue: 7-8 Pages: i-iii
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Antenna tilt optimization for multi-cell massive multiple-input multiple-output (MIMO) systems with two tilts Frequenz (IF 0.543) Pub Date : 2020-06-29 Deming Chu; Anzhong Hu
In this paper, we study the optimization of two tilt angles corresponding to two antenna arrays in each base station (BS) of a massive multiple-input multiple-output system. We consider two scenarios with perfect channel state information (CSI) and imperfect CSI. In the limit of the number of the BS antennas, the channel orthogonality is employed to derive the limit and the lower bound of the throughputs
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A simple quad-band printed diversity antenna with high isolation without extra structure Frequenz (IF 0.543) Pub Date : 2020-06-29 Azadeh Imani; Mohammad Sajjad Bayati
In this paper a Quad-band diversity antenna with a small size of 48 × 28 × 0.8 mm3 printed on FR4 substrate is presented that consists of two same pentagonal-shaped patch elements. Four arc-shaped slots in the radiating elements are introduced to obtain the quad-band operation with good return loss. The antenna is designed for covering 5.91 GHz in IEEE 802.11 b/g/n standards, 7.40 GHz in C-Band, 9
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Ultra-Wideband (UWB) characteristic estimation of elliptic patch antenna based on machine learning techniques Frequenz (IF 0.543) Pub Date : 2020-06-29 Duygu Nazan Gençoğlan; Mustafa Turan Arslan; Şule Çolak; Esen Yildirim
In this study, estimation of Ultra-Wideband (UWB) characteristics of microstrip elliptic patch antenna is investigated by means of k-nearest neighborhood algorithm. A total of 16,940 antennas are simulated by changing antenna dimensions and substrate material. Antennas are examined by observing Return Loss and Voltage Standing Wave Ratio (VSWR) characteristics. In the study, classification of antennas
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A compact parallel coupled meander lines shaped composite right/left-handed transmission line (CRLH-TL) based symmetric quasi-0 dB coupler Frequenz (IF 0.543) Pub Date : 2020-06-29 Abhishek Kumar; Dileep Kumar Upadhyay; Srikanta Pal
In this paper, parallel coupled meander lines (PCML) composite right/left-handed transmission line (CRLH-TL) based symmetrical quasi-0 dB coupled-line coupler is presented. Proposed coupler shows measured backward wave coupling level of 0.81 dB at frequency of 6.17 GHz with 3 dB fractional bandwidth (FBW) of 12.64%. Throughout the 3 dB frequency range (5.78–6.56 GHz), isolation and insertion loss of
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Designing Modern Compact Microstrip Planar Quadband Bandpass Filter for Hand Held Wireless Applications Frequenz (IF 0.543) Pub Date : 2020-05-27 Abdul Basit; M. Irfan Khattak
This paper presents a modern compact quad-band bandpass filter (BPF) using dual-mode stub loaded half wave (λ/2) resonators, where a couple of directly fed resonators are loaded with two identical inner resonators such that the direct fed resonators will act as feeding structure for the loaded resonators. Based on the proposed stub loaded resonators, a modern filter with seven transmission zeros (TZs)
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Remnant Mode Conversion Noise Suppression Using a Surface Mount Device Capacitor Frequenz (IF 0.543) Pub Date : 2020-05-27 Seungjin Lee; Jaehyuk Lim; Sangyeol Oh; Jaehoon Lee
A novel scheme to suppress the remnant mode conversion noise with a surface mount device (SMD) capacitor on dual back-to-back bent differential lines is proposed. To suppress the remnant mode conversion noise, an additional SMD capacitor is loaded on the differential lines between two bends to equalize even- and odd-mode velocities. The mode conversion noise suppression characteristics of the proposed
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Closed Loop Resonator Based Compact UWB Antenna with Single Notched Band Varying between WLAN and X-band for UWB Applications Frequenz (IF 0.543) Pub Date : 2020-05-27 Mohammad Ahmad Salamin; Sudipta Das; Asmaa Zugari
In this paper, a novel compact UWB antenna with variable notched band characteristics for UWB applications is presented. The designed antenna primarily consists of an adjusted elliptical shaped metallic patch and a partial ground plane. The proposed antenna has a compact size of only 17 × 17 mm2. The suggested antenna covers the frequency range from 3.1 GHz to 12 GHz. A single notched band has been
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A Broadband Circularly Polarized Cross-slotted Patch Antenna with Horizontal Meandered Strip (HMS) Frequenz (IF 0.543) Pub Date : 2020-05-27 M. K. Verma; Binod K. Kanaujia; J. P. Saini; Padam S. Saini
A broadband circularly polarized slotted square patch antenna with horizontal meandered strip (HMS) is presented and studied. The HMS feeding technique provides the good impedance matching and broadside symmetrical radiation patterns. A set of cross asymmetrical slots are etched on the radiating patch to realize the circular polarization. An electrically small stub is added on the edge of the antenna
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Wide-angle Frequency Scanning Antenna Achieved by Leaking Spoof Surface Plasmon Polariton Frequenz (IF 0.543) Pub Date : 2020-05-27 Manlan Deng
Inspired by the theory of leaky wave antenna, a broadband and wide-angle frequency scanning antenna is proposed in this paper. My goal is to trade a narrow frequency band for a wide-angle beam scanning. Since the dispersion of spoof surface plasmon polariton (SSPP) mode slow-wave possesses larger gradient than that of the waves in the air, the metallic corrugated line (MCL) is adopted for energy transmission
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Design of Compact Highpass Filter for 5G mm-wave Applications Using Complementary Split Ring Resonator Frequenz (IF 0.543) Pub Date : 2020-05-27 Parthasarathy Ramanujam; P. G. Ramesh Venkatesan; Chandrasekar Arumugam; Manimaran Ponusamy
This article presents a design of highpass filter (HPF) for millimeter-wave (mm-wave) applications using a square complementary split-ring resonator (SCSRR). A miniaturized size HPF filter is obtained by overlapping the Right-Hand (RH) and Left-Hand material. The arrangement of inter-digital parallel coupled capacitor and SCSRR offers low insertion loss, high selectivity with a sharp roll-off factor
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Wilkinson Power Divider with Band-pass Filtering Response and Harmonics Suppression Using Open and Short Stubs Frequenz (IF 0.543) Pub Date : 2020-05-27 Saeedeh Lotfi; Saeed Roshani; Sobhan Roshani; Maryam Shirzadian Gilan
In this paper, a new Wilkinson Power Divider (WPD) using open and short stubs is proposed. Open and short stubs are utilized instead of 1/4 wave transmission lines in initial structure to achieve harmonics suppression. The proposed WPD is designed for operational frequency of 0.9 GHz and creates 3 transmission zeros at 1.8 GHz, 2.7 GHz and 3.6 GHz, for suppressing second, third and fourth harmonics
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Frontmatter Frequenz (IF 0.543) Pub Date : 2020-04-22
Journal Name: Frequenz Volume: 74 Issue: 5-6 Pages: i-iii
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A novel tri-band reconfigurable microstrip patch antenna Frequenz (IF 0.543) Pub Date : 2020-04-08 Wen Tao Li; Meng Wei; Bahareh Badamchi; Harish Subbaraman; Xiaowei Shi
In this paper, a novel tri-band reconfigurable patch antenna with simple structure is presented. By changing the on-off state of only two PIN diodes, the antenna can operate in three bands, namely X-band, Ku-band, and Ka-band. The overall size of the antenna is 0.24λL × 0.5λL × 0.019λL, where λL is the free-space wavelength of the lowest operating frequency. A prototype is fabricated and measured to
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Circularly polarized reconfigurable microstrip loop antenna using parasitic patches and PIN diodes Frequenz (IF 0.543) Pub Date : 2020-04-04 Supakit Kawdungta; Chuwong Phongcharoenpanich
This research proposes a novel circularly polarized (CP) reconfigurable microstrip loop antenna for 2.4–2.5 GHz advanced wireless communication using two parasitic patches and two PIN diodes. The reconfigurable antenna can alternate between right hand circular polarization (RHCP) and left hand circular polarization (LHCP) at the main beam by manipulating the ON/OFF status of the PIN diodes. Simulations
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Tunable balanced to balanced filtering power divider with high common-mode suppression Frequenz (IF 0.543) Pub Date : 2020-04-04 Cao Zeng; Xue Han Hu; Feng Wei; Xiao Wei Shi
In this paper, a tunable balanced-to-balanced in-phase filtering power divider (FPD) is designed, which can realize a two-way equal power division with high selectivity and isolation. A differential-mode (DM) passband with a steep filtering performance is realized by applying microstrip stub-loaded resonators (SLRs). Meanwhile, six varactors are loaded to the SLRs to achieve the center frequency (CF)
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Approach to Precisely Model an Underwater Electric Dipole Source with TSS-FDTD Frequenz (IF 0.543) Pub Date : 2020-03-26 Shitian Zhang; Kuisong Zheng; Xiaoyun Tu; Mingyue Yang
Abstract Due to the fields in the near-field area of an electric dipole source which is sharply and rapidly varying with distance, a novel approach to introduce an underwater low-frequency excited source is proposed in this paper. The approach is built up to combine the theoretical solution for an electric dipole in a conductive medium with the total-field scattered-field boundary to reduce the error
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Exchange-Based Non-Decreasing Relay Selection For Decentralized UAVs-aided D2D Networks Frequenz (IF 0.543) Pub Date : 2020-03-26 Xijian Zhong; Yan Guo; Ning Li; Yancheng Chen
Abstract With the advantage of high flexibility, unmanned aerial vehicle (UAV) can be deployed in a high height to provide high probability of line-of-sight (LoS) transmission for the ground units. Thus, UAV can bring much gain for communication systems. In this paper, we consider that a set of UAVs are deployed in the air to work as relays to aid the ground device-to-device (D2D) pairs. For the reason
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Design and Analysis of a Dispersion-engineered and Highly Nonlinear Rib Waveguide for Generation of Broadband Supercontinuum Spectra Frequenz (IF 0.543) Pub Date : 2020-03-26 Mohammad Reza Alizadeh; Mahmood Seifouri
Abstract In this paper, a waveguide consisting of a core of As2Se3 chalcogenide glass and the upper and lower claddings of MgF2 with two zero-dispersion wavelengths (ZDW) has been proposed. By optimization of the dimensions of the core and the claddings, their effects on the dispersion curve have been investigated and a suitable structure with a flat dispersion curve, an effective mode area of 1.6 μm2
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A Position-Independent Reflection-Only Method for Complex Permittivity and Permeability Determination with One Sample Frequenz (IF 0.543) Pub Date : 2020-03-26 Chuang Yang
Abstract This paper presents a position-independent reflection-only method for determining complex permittivity and permeability of a sample. In this method, both the short and match calibration kits are used to measure the reflection coefficients. Only one sample positioned arbitrarily is measured using a one-port vector network analyzer (VNA), while the complex permittivity and permeability of the
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Design of a Miniaturized Class F Power Amplifier Using Capacitor Loaded Transmission Lines Frequenz (IF 0.543) Pub Date : 2020-03-26 Ali Pirasteh; Saeed Roshani; Sobhan Roshani
Abstract In this paper, a new method to decrease the dimensions of the microstrip structures and reducing the overall size of the class F amplifiers is presented. First, by using the PHEMT transistor with a conventional harmonic control circuit (HCC), a low-voltage class F amplifier in the L band frequency at the operating frequency of 1.75 GHz is introduced, which named primitive class F power amplifier
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Design and Development of 3D Printed MIMO RDRA with Two Directional Pattern Diversity for LTE Applications Frequenz (IF 0.543) Pub Date : 2020-03-26 Varakumari Samudrala; Vinay Kumar Pamula
Abstract A two-port MIMO Dielectric Resonator Antenna (DRA) has been studied and developed. The proposed antenna consists of a single Rectangular DRA (RDRA). The antenna is integrated with the substrate and electrified using coaxial feed, which excites hybrid TM mode in the DR. The mutual coupling within both the ports has been reduced by employing copper shielded on two vertical walls of a rectangular
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Radar Coincidence Imaging Based on Adaptive Frame-iteration Compressive Sensing Frequenz (IF 0.543) Pub Date : 2020-03-26 Sihui Guan; Yaoliang Song
Abstract The radar coincidence imaging (RCI) doesn’t rely on relative motion between target and radar, but its super-resolution characteristics requires a large sample size of the radiation fields. In the actual operation, transmitting too many signals at once not only requires large antenna array, but also easily causes aliasing. Thus the model of adaptive frame-iteration compressive sensing (AFCS)
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Design Analysis of Inductorless Active Loaded Low Power UWB LNA Using Noise Cancellation Technique Frequenz (IF 0.543) Pub Date : 2020-03-26 Dheeraj Kalra; Manish Kumar; Aasheesh Shukla; Laxman Singh; Zainul Abdin Jaffery
Abstract This paper includes a design analysis of an inductorless low-power (LP) low-noise amplifier (LNA) with active load for Ultra Wide Band (UWB) applications. The proposed LNA consists of two parallel paths, one is the common source (CS) path and second is the CG path. The CG path has the edge advantage of improving overall Noise figure (NF) due to wide band impedance matching in UWB, while the
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Gridless Super-Resolution Direction-of-Arrival Estimation with Arbitrary Planar Sparse Array Frequenz (IF 0.543) Pub Date : 2020-03-26 Aihong Lu; Yan Guo; Sixing Yang
Abstract Two-dimensional (2D) direction-of-arrival (DOA) estimation with arbitrary planar sparse array has attracted more interest in massive multiple-input multiple-output application. The research on this issue recently has been advanced with the development of atomic norm technique, which provides super resolution methods for DOA estimation, when the number of snapshots is limited. In this paper
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