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Circularly polarized gap-coupled variations of square microstrip antennas employing U-slot for WLAN and bluetooth applications Electromagnetics (IF 0.8) Pub Date : 2024-03-13 Amit A. Deshmukh, Aarti G. Ambekar, Venkata A. P. Chavali
Circularly polarized gap-coupled variations of square microstrip antennas using U-slot are proposed in 2400 MHz frequency spectrum for WLAN and Bluetooth applications. Design with patches gap-coupl...
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A conical beam antenna array with filter characteristics for multi-rotor unmanned aerial vehicle measurement system Electromagnetics (IF 0.8) Pub Date : 2024-03-10 Yuchen Gao, Ming Wen, Lin Zhou, Shitao Huan, Wei Hu, Wen Jiang
This paper proposed a novel filter antenna with the conical beam, which consists of four magnetoelectric (ME) dipole antennas. By printing parasitic patches and etching open slots on the bottom of ...
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High gain narrow wall standing wave slotted waveguide antenna with flanges Electromagnetics (IF 0.8) Pub Date : 2024-02-19 Koray Surmeli
In this study, narrow (edge) wall standing wave slotted waveguide antenna design is proposed. This antenna operates at 2.812 GHz in S frequency band. Also, the design equations and slot characteriz...
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Multifunctional coding metasurface for focusing and beam deflection based on polarization selection Electromagnetics (IF 0.8) Pub Date : 2024-02-20 Song Tian, Mingxiu Han, Juan Xu, Hanyue Liu
In this paper, a full-space multifunctional coding metasurface (MS) with reflection and transmission integration is proposed to realize the independent manipulation of electromagnetic waves at two ...
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Compact and bandwidth-enhanced circular-polarized dipole antenna for 5G base-station applications Electromagnetics (IF 0.8) Pub Date : 2024-02-05 Xiumei Shen, Chuanyun Zhang, Bo Qiu, Xianjiang Zhong, Yingzeng Yin
A miniaturized and wideband circular-polarized (CP) dipole antenna with couple-feed has been developed for 5G base-station applications. In this design, two novel L-shaped short stubs working as th...
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Quad-PortMIMO dielectric ResonatorAntenna with filtering response for IoT application Electromagnetics (IF 0.8) Pub Date : 2024-01-18 Abhimanyu Yadav, Deepak Sigroha, Manish Tiwari, Anand Sharma
This article presents a four-port Multi-Input Multi-Output (MIMO) antenna based on Dielectric Resonators (DR), showcasing excellent filtering characteristics, high isolation between ports, and stro...
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Design of a compact antenna with broadband and high gain Electromagnetics (IF 0.8) Pub Date : 2024-01-09 Ngoc-Lan Nguyen, Cong Danh Bui, Quang Sang Nguyen
A novel compact antenna with characteristics of broadband and high gain is proposed in this paper. The proposed antenna comprises 1 × 2 elements that are connected together by a balance power divid...
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Tapered-slot radiation-traveling wave mechanism inspired extreme wideband efficient antenna with ultra-low SLL Electromagnetics (IF 0.8) Pub Date : 2023-12-08 Sneha Tiwari, Srikanta Pal
The manuscript proposes a radiation-inspired tapered-slot-traveling wave mechanism rooted in the combined profile of an efficient extreme wideband (EWB) antenna with ultra-low side-lobe level (SLL)...
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Dual-passband filter using dual-mode substrate-integrated waveguide resonator Electromagnetics (IF 0.8) Pub Date : 2023-12-08 Shichao Jin, Kaijun Song, Lele Fang, Qian Li, Yong Fan
A novel dual-band bandpass filter (DB-BPF) based on SIW dual-mode resonant cavity is proposed in this study. This resonant cavity works in the degenerate mode TE102 mode and TE201 mode. The two mod...
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Performance analysis of all-optical 1-bit comparator using 2D-PhC nonlinear ring resonators based on threshold switching method Electromagnetics (IF 0.8) Pub Date : 2023-12-08 Asghar Askarian, Fariborz Parandin
In this research, an all-optical 1-bit comparator (AOCMP) is designed using two-dimensional photonic crystals (2D-PhCs) nonlinear ring resonators (NRRs), and its performance is analyzed based on th...
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Performance prediction of dielectric resonator based MIMO antenna for sub-6.0 GHz using machine learning algorithms Electromagnetics (IF 0.8) Pub Date : 2023-12-08 Khushboo Pachori, Amit Prakash, Nagendra Kumar
In this article, a dual port dielectric resonator antenna is modeled using various machine learning algorithms i.e. deep neural network (DNN), Random Forest, and XG boost. The unique properties of ...
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Novel dual compressive sensing method for solving the monostatic scattering problems of three-dimensional target Electromagnetics (IF 0.8) Pub Date : 2023-12-07 Yongjie Ma, Zhonggen Wang, Wenyan Nie, Yufa Sun, Juan Wu, Pan Wang
According to the conventional dual compressive sensing method is limited to solving the electromagnetic scattering problems for two-dimensional targets, the Characteristic Basis Functions (CBFs) co...
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Dual port asymmetrical dumbbell-shaped dielectric resonator-based MIMO antenna with pattern diversity for wideband applications Electromagnetics (IF 0.8) Pub Date : 2023-12-04 Gagandeep Bharti, Bittu Kumar, Dharmendra Kumar, Anand Sharma
In this article, a wideband ceramic-based dual port MIMO (Multi Input Multi Output) antenna is investigated and analyzed. Wideband features are obtained with the assistance of asymmetrical dumbbell...
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A new broadband cross-dipole CP antenna with modified square-cavity reflector Electromagnetics (IF 0.8) Pub Date : 2023-12-04 Lichao Hao, Dong Yang, Lei Wang
A new broadband cross-dipole CP antenna with modified square-cavity reflector is proposed in this work. The cross-dipole CP antenna is composed of four rotated L-shaped patches, a pair of vacant-qu...
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An ultra-wideband coding phase gradient metasurface for RCS reduction Electromagnetics (IF 0.8) Pub Date : 2023-12-04 Baoqin Lin, Wenzhun Huang, Jianxin Guo, Zuliang Wang, Baigang Huang, Kaibo Si
In this work, an ultra-wideband coding phase gradient metasurface (CPGM) is proposed for radar cross section (RCS) reduction. The design process is presented in detail, in which eight types of codi...
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Wideband millimeter-wave hybrid dielectric resonator antenna array with dual-slot feeding Electromagnetics (IF 0.8) Pub Date : 2023-12-04 Wei Luo, Meilin Liu, Zihao Wang
A hybrid dielectric resonator antenna (DRA) array is proposed for the wideband millimeter-wave communication. The radiator is composed with a pair of stacked dielectric resonators (DRs), which are ...
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A dual-band low-profile Fabry–Perot resonator antenna with single partially reflecting surface Electromagnetics (IF 0.8) Pub Date : 2023-12-04 Yufeng Liu, Lei Xu, Xiaolei Zhao, Jiao Zhang, Shen Wang, Wenmei Zhang
This paper presents a novel design for a low-profile Fabry–Perot resonator antenna (FPRA) that operates at two distinct frequency bands using a single partially reflecting surface (PRS). The PRS is...
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Broadband dual-polarized antenna array with enhanced radiation pattern stability Electromagnetics (IF 0.8) Pub Date : 2023-12-04 Qifu Gu, Bin Wang, Peng Zhao
In this paper, a broadband dual-polarized antenna array with stable radiation pattern is proposed for 5 G base station applications. The proposed antenna array consists of a 2 × 2planarantennaarray...
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A broadband AMC metasurface for radar cross section reduction and application in microstrip antenna Electromagnetics (IF 0.8) Pub Date : 2023-11-22 Liping Han, Jiaying Guo, Jing Qi, Guorui Han, Yufeng Liu
A broadband checkerboard artificial magnetic conductor (AMC) metasurface with a 61% bandwidth is proposed. Two different AMC unit cells with 180° (±37°) effective reflection phase difference over a...
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A single layered broadband circularly polarized MIMO antenna based on metasurface with aperture CPW feed Electromagnetics (IF 0.8) Pub Date : 2023-10-25 Srinivas Guthi, Vakula Damera
In this paper, a single-layered broadband circularly polarized MIMO antenna is presented for a 5 GHz wireless local area network (WLAN). The Metasurface is designed with an array of patches and the...
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Modulation of antenna beam in both elevation and azimuth planes by reflective phase gradient metasurface Electromagnetics (IF 0.8) Pub Date : 2023-10-25 Kexin Yang, Juan Xu, Hui Pang
A broadband low profile magneto-electric dipole (ME-dipole) antenna is proposed which can control the steering of the antenna beam in the elevation plane and azimuth plane. A reflective phase gradi...
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Performance prediction of metasurface-loaded ceramic-based MIMO antenna for B41/n41 bands using ML algorithms Electromagnetics (IF 0.8) Pub Date : 2023-10-25 Khushboo Pachori, Amit Prakash, Nagendra Kumar
In this communication, a metasurface-loaded ceramic-based dual port antenna is designed and raised via artificial neural networks (ANN), k-nearest neighbor (KNN) and XG Boost. With the assistance o...
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Effect of Pulse-Shifting on Calculating Sideband Power Losses in Non-uniform Time-Modulated Array Electromagnetics (IF 0.8) Pub Date : 2023-10-25 Sujoy Mandal, Sujit Kumar Mandal
In nonuniform time-modulated array (NTMA), despite modulating the antenna elements with nonidentical modulation frequencies, some harmonics may overlap in space at a particular frequency. In this p...
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Super-compact equal/unequal half-mode substrate integrated waveguide filtering power dividers using complementary G-shaped resonator Electromagnetics (IF 0.8) Pub Date : 2023-09-15 Mostafa Danaeian
In this paper, three super-compact equal/unequal filtering power dividers (FPDs) by combining the half-mode substrate integrated waveguide (HMSIW) platform and the metamaterial unit cell are propos...
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Linear to circular polarized wave convertor loaded dual port dielectric resonator antenna with enhanced gain for WLAN applications Electromagnetics (IF 0.8) Pub Date : 2023-09-13 Abhay Krishna Yadav, Sudhanshu Verma, Krishna Kanth Varma Penmatsa, Anand Sharma
In this article, a dual-port ceramic-based radiator is discussed and examined. A pentagon-shaped slot is used to excite the cylindrical-shaped dielectric, which stimulates HEM11δ mode in it. A meta...
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An ultra-low profile reconfigurable multi-beam antenna based on impedance modulated metasurface Electromagnetics (IF 0.8) Pub Date : 2023-08-28 Zekui Zhang, Wenmei Zhang
ABSTRACT A new ultra-low profile reconfigurable multi-beam antenna is proposed. It is based on impedance modulated metasurface fed with a one-divide-four electronically controllable feed network. By properly arranging the feed network, six beams at different azimuth planes are formed by controlling four diodes. The gain is enhanced through loading a cross metal strip in the middle of metasurface. The
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Investigations of all-optical gates based on linear photonic crystals using the PSK technique and beam interference effect Electromagnetics (IF 0.8) Pub Date : 2023-08-15 Asghar Askarian, Fariborz Parandin
ABSTRACT In this paper, all optical OR, AND, NOR and NAND gates based on linear photonic crystals (LPhCs) have been numerically designed and simulated by the plane wave expansion (PWE) and finite difference time domain (FDTD) methods. The LPhC fundamental structure with cross-section of 114 μm2μm2 is used for designing the proposed all optical gates (AOGATEs), which is composed of 15 × 23 cubic matrix
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Design of folded rectangular microstrip antenna on thinner substrate for wideband response Electromagnetics (IF 0.8) Pub Date : 2023-08-11 Venkata A. P. Chavali, A. A. Deshmukh
ABSTRACT Wideband microstrip antenna is realized by adding more than one resonant modes in the patch. In this paper, on electrically thinner substrate, design of modified shape rectangular microstrip antenna by employing folded rectangular patch is presented for linear polarized wideband response. Unlike the conventional rectangular patch, radiation pattern and resonance frequency at the second-order
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Dual Plane Monopulse Comparator Network System using Substrate Integrated Waveguide Hybrid Coupler Electromagnetics (IF 0.8) Pub Date : 2023-08-11 Sanjay Bhilegaonkar, Pradeep Mane
ABSTRACT This paper presents a new compact monopulse comparator network system (MCNS) using a modal substrate-integrated waveguide (SIW) hybrid coupler for the first time. The main objective of this research is to evaluate the performance of dual-plane MCNS based on return loss and coupling coefficients. A detailed analysis, design, and implementation of dual-plane MCNS is performed using the four
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A wideband omnidirectional dipole antenna with parasitic loop based on multi-resonant modes Electromagnetics (IF 0.8) Pub Date : 2023-08-07 Yanfeng Geng, Huihui Gao, Guorui Han, Liping Han, Hao Yuan, Wenmei Zhang
ABSTRACT A wideband omnidirectional dipole antenna with parasitic loop based on multi-resonant modes is proposed for WLAN, 5 G Sub-6 GHz, and RFID applications. The antenna is composed of a regular dipole with co-planar strips and a parasitic loop with four U-shaped branches. A regular dipole with co-planar strips is used to generate two resonant modes, and the parasitic loop around it generates another
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A wideband quasi-Yagi antenna using symmetrical slots on the ground plane Electromagnetics (IF 0.8) Pub Date : 2023-08-07 Goksel Turan, Hayrettin Odabasi
ABSTRACT A wideband quasi-Yagi antenna with symmetrical rectangular slots in the ground plane is studied. The feeding structure of the antenna is simplified, consisting of a microstrip transmission line and a short strip. The driver and director arms are designed as half on both sides of the substrate to improve pattern stability. The antenna’s bandwidth is improved by symmetrically adding rectangular
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Design of a dual-band filter with high selectivity and wide stopband Electromagnetics (IF 0.8) Pub Date : 2023-07-19 Li-Qin Liu, Min-Hang Weng, Wen-Yen Hsu, Huang-Sheng Lai, Ru-Yuan Yang
ABSTRACT This paper proposes a design of dual-band bandpass filter with a high selectivity and a wide stopband, by using two ring type hairpin resonators. The equivalent circuit of the used resonator is analyzed through the analysis of odd and even modes. The designed filter can achieve dual passbands at 2.4 GHz and 3.65 GHz for wireless local area network (WLAN) and 5 G communication systems, with
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A novel wideband dielectric resonator antenna with compact size Electromagnetics (IF 0.8) Pub Date : 2023-07-03 H. R. Dalili Oskouei, H. Dehjouriyan, M. Mohammadi Shirkolaei
ABSTRACT In this paper, a wideband dielectric resonator antenna with compact size is presented. The proposed antenna is formed by four dielectrics. Non-adjacent dielectrics have same permittivity constant. A 50-ohm micro strip feed line is used to exciting the antenna through the coupling slot. By optimizing the dimensions and structure of the antenna, impedance bandwidth of 3.25 to 4.4 GHz is obtained
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Balanced single/dual band trisection filters Electromagnetics (IF 0.8) Pub Date : 2023-06-27 Miguel-Antonio Romero-Ramirez, Jose-Luis Olvera-Cervantes, Tejinder Kaur Kataria, Alonso Corona-Chavez
ABSTRACT This work presents balanced microstrip filters with asymmetrical frequency response based on a balanced trisection topology. The proposed balanced trisection topology has the feature of being used in single and multiband microwave filters. In this work, in order to test the topology flexibility, we address two applications, one for a single-band filter and the other for a dual-band filter
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A Wideband Dual-Polarized Tightly Coupled Array with Compact Size for 5G Millimeter-wave Mobile Devices Electromagnetics (IF 0.8) Pub Date : 2023-06-19 Chan Bai, Shuai Zhang, Qi Gong, Zixuan Song, Yuguo Liu
ABSTRACT A miniaturized dual-polarized smartphone antenna based on tightly coupled dipole array (TCDA), applying to 5 G millimeter-wave (mmW), is presented. The antenna element has a size of 2.94 mm × 3.05 mm × 0.94 mm and covers a bandwidth of 91.5% and 88.4% with VSWR<2 for pol-x and pol-y, respectively. To achieve low cost, compact size, and reduce the number of ports, a specific miniature feeding
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External mutual coupling between inclined slots cut in the narrow wall of a rectangular waveguide Electromagnetics (IF 0.8) Pub Date : 2023-06-19 Mehdi Shirichian, Mohammad Ali Khak, Farhad Ghorbani, Farid Nazari, Amirreza Nikfal, Farhad Mazlumi, Hadi Aliakbarian
ABSTRACT In this paper, a modeling technique to calculate the external mutual coupling between inclined slots cut in the narrow wall of a rectangular waveguide is presented. A voltage source is inserted across the center of the first slot opening to excite one of them and a monitor on the second one captures the voltage. To eliminate the internal coupling between slots, an absorbing slab is inserted
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Novel corrugated rectangular dielectric resonator antenna with wide half power beam width Electromagnetics (IF 0.8) Pub Date : 2023-06-06 Saeed Fakhte
ABSTRACT In this work, a dielectric resonator antenna element is corrugated in a specific way, which led to increase its half power beam width (HPBW). The HPBW of the antenna is investigated for different values of corrugation depth and it has been concluded that HPBW can be increased by increasing this depth. By embedding periodic grooves in the DRA walls, it is possible to adjust the radiation intensity
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Miniaturized and optimized half mode SIW bandpass filter design integrating Hilbert cells as DGS Electromagnetics (IF 0.8) Pub Date : 2023-05-08 Mohammed El Amine Chaib, Nabil Cherif, Mehadji Abri, Hadjira Badaoui
ABSTRACT This paper demonstrates a novel configuration of half mode substrate integrated waveguide HMSIW bandpass selective filter based on Hilbert cells as DGS. Two 50-Ohm conventional micro-strip are used as feed lines. The filter is designed and optimized using CST Software, Where a parametric study is used to optimize its geometric parameters. In our design, six periodic Hilbert cells are used
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A new wideband circularly polarized square-slot antenna with parasitic elements Electromagnetics (IF 0.8) Pub Date : 2023-05-07 Dong Yang, Lichao Hao, ZhenHua Cao, Wen-Juan Dai
ABSTRACT A novel broadband circularly polarized square-slot antenna with parasitic elements is presented in this article. The proposed antenna with dimensions of 77.6 × 77.6 × 1.6 mm3 is composed of a L-shaped strip, a pair of rectangular slots, a L-shaped branch, and an inverted L-shaped feeding line. First, a pair of rectangular slots are used to excite an impedance resonance point that appears near
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A Compact Low Profile, Wideband and High Gain Stacked Dielectric Resonator Antenna Electromagnetics (IF 0.8) Pub Date : 2023-04-30 Pramod Kumar Gupta, Anil Rajput, Manshree Mishra, Biswajeet Mukherjee
ABSTRACT In this paper, a novel, compact, low-profile miniaturized stacked Dielectric Resonator Antenna (DRA) for wideband applications is proposed. The design consists of two dielectric resonators of different dielectric constant stacked together. The Dielectric Resonators (DRs) are fabricated on the top side of the substrate (Taconic RF-35) with an inverted-trapezoidal patch as a feeding mechanism
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A metal-only reconfigurable reflectarray antenna for generating diversified circular-polarization focused beams and mode-agile vortex beams Electromagnetics (IF 0.8) Pub Date : 2023-04-27 Yuxin Mo, Min Wang, Wei Luo, Yi Ren
ABSTRACT In this article, a metal-only reconfigurable reflectarray antenna (RRA) is proposed for generation of diversified circular-polarization (CP) focused beams and mode-agile vortex beams in the X-band. The proposed RRA element has the 3-D metal-only configuration, which consists of three staircases with different heights, a turntable, a latch, and a base. By rotating the proposed RRA element in
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Design of a broadband frequency-tunable planar filtering power divider Electromagnetics (IF 0.8) Pub Date : 2023-04-27 Honggang Hao, Huan Xu, Qinxuan Ling, Yunrui Wang, Bing Wang
ABSTRACT In order to meet the development requirements of multi-frequency and functional integration of radio frequency (RF) modules, a broadband tunable filtering power divider with center frequency is designed. A new structure is composed of open branch line, step impedance resonator, and double branch resonator. The filter response is realized by branch line and double branch resonator. The resonant
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Ultra-wideband radar cross-section reduction based on phase cancellation Electromagnetics (IF 0.8) Pub Date : 2023-04-23 Baoqin Lin, Wenzhun Huang, Jianxin Guo, Xiang Ji, Yan Zhou, Yunyan Wu
ABSTRACT In this study, a 2-bit coding metasurface is proposed, which can achieve ultra-wideband radar cross section (RCS) reduction under arbitrary polarized incidences due to phase cancellation. In the design process of the 2-dit coding metasurface, a novel polarization conversion metasurface (PCM) is proposed at first, which can realize ultra-wideband circular-polarization (CP) maintaining reflection;
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Research on frequency reconfigurable bowtie antenna loaded with triangular shaped fractal parasitic elements Electromagnetics (IF 0.8) Pub Date : 2023-03-23 Xiaoqiao Deng, Yuanjiang Li, Xiaolong Li, Lin Bao, Yubo Tian
ABSTRACT The bowtie antenna loaded with triangular-shaped fractal parasitic elements (TSFPE) is a kind of novel dual-band antenna with excellent performance and unique advantages. If it can achieve frequency reconfiguration by loading RF switches, its application will be further expanded. This paper attempts to load the RF switch onto the novel antenna. It is found in the research that the TSFPE performance
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A novel pattern agile microstrip antenna for modern wireless communication systems Electromagnetics (IF 0.8) Pub Date : 2023-03-22 Abha Sharma, Ajay Yadav, Amit Rathi
ABSTRACT This article presents a circular microstrip patch antenna loaded with three complementary split rings (CSRRs) on the ground plane for pattern agility features. The antenna resonated at 5.3 GHz and accommodated the frequency spectrum from 5.1–5.7 GHz for different CSRR combinations. The reconfigurable pattern feature has been produced with three p-i-n diode combinations integrated with the
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A novel dual-polarized gain-enhanced microstrip patch antenna Electromagnetics (IF 0.8) Pub Date : 2023-03-22 Long Jin, Zhibin He, Jiuyang Xiao, Yao Sun, Yangmiao Lin, Ruohan Zhang
ABSTRACT A broadside direction gain-enhanced low-cost dual-polarized microstrip patch antenna has been presented. The proposed antenna consists of a slot-loaded cross-shaped patch and shorting pins. The orthogonal polarized radiating elements works in TM05 and TM12, meanwhile slot-loaded excite TM01. The equivalent magnetic currents (EMCs) amplitude, frequency, and flow direction of the TM12 are controlled
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A series-fed low sidelobe antenna for 24-GHz automotive radar Electromagnetics (IF 0.8) Pub Date : 2023-03-21 Wenbo Li, Bin Wang, Xue Tian
ABSTRACT In this paper, a series-fed microstrip antenna array with low sidelobe is presented for 24-GHz automotive radar. Chebyshev distribution is realized by different widths of a quarter-guided wavelength (λg/4) feedline between adjacent antenna elements, achieving a low sidelobe level (SLL). A 1 × 8 antenna array is designed with the SLL of −23.1 dB at 24.125 GHz, which is extended to 2 × 8 and
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Wideband circularly polarized microstrip-slot antenna with parasitic elements Electromagnetics (IF 0.8) Pub Date : 2023-03-19 Wen-Juan Dai
ABSTRACT In this letter, a new wideband circularly polarized (CP) slot – microstrip patch antenna (SPMA) is elaborated. The proposed antenna consists of four crown patches as parasitic patches, an L-shaped crown slot etched into the ground plane as a parasitic slot, and a circular loop sequential rotating feeding structure (SRFS) as a driven element. First, four crown patches are used to stimulate
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Ionospheric delay estimation of Loran skywave using simple cosine model Electromagnetics (IF 0.8) Pub Date : 2023-03-19 Kai Zhang, Fan Yang, WeiDong Wang, Chen Zheng, Borong Zou, Hui Li
ABSTRACT Ionospheric delay is the most significant source of error affecting the Loran skywave timing. To improve timing service, we propose a new ionospheric delay estimation method in this paper. It is a cosine model that combines the ionospheric physical characteristics and skywave delay variation law. This semi-empirical and semi-measured model has characteristics of accuracy and simplicity compared
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An efficient method for analysis of electromagnetic scattering from a 3-D coated object half-buried in PEC rough surface Electromagnetics (IF 0.8) Pub Date : 2023-02-21 Hong-Jie He, Ya Zhang, Ke-Yun Li
ABSTRACT To accurately simulate the electromagnetic scattering from a three-dimensional (3-D) coated object half-buried in perfectly electrically conductor (PEC) rough surface, an efficient method combining the 3-D vector finite element method-boundary integral method (FEM-BIM) with fast multipole method (FMM) is proposed in this paper. FEM is used to model the coated object and the multiple interactions
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A novel gain enhanced Vivaldi antenna for a breast phantom measurement system Electromagnetics (IF 0.8) Pub Date : 2023-02-21 Hüseyin Özmen, M. Bahaddin Kurt
ABSTRACT In this study, a breast phantom measurement system based on radar-based microwave imaging technique is proposed. For this purpose, a small-size Vivaldi antenna with high gain and ultra-wide band is designed. The antenna bandwidth is in the range of 3–10.6 GHz, and the maximum realized gain is 8.5 dB. The size of the antenna is 36 × 36 mm2, and FR4 was used as dielectric material. Bandwidth
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Multibeam half radial line slot array (RLSA) antennas Electromagnetics (IF 0.8) Pub Date : 2023-02-14 Teddy Purnamirza, Ranggi Rian Syaputra, Junisbekov M. Shardarbekovich, Imran Mohd Ibrahim, Kabanbayev A. Batyrbekovich, Mulyono Mulyono, Depriwana Rahmi, Halim Mudia
ABSTRACT An original design of a multibeam Radial Line Slot Array (RLSA) antenna having two beams directed to the broadside and two beams directed to the backside is discussed in this research. The uniqueness of this design is the implementation of multibeam as a half-cut RLSA instead of a full-circle RLSA, which aims to make them more suitable for smaller devices. In order to produce a beam to the
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UWB full polarization single-plane monopulse reflector antenna Electromagnetics (IF 0.8) Pub Date : 2023-02-14 Fazel Ghiasvand
ABSTRACT UWB dual polarization azimuth plane monopulse feed-reflector antenna is presented. Quadridge open ended waveguide working in frequency range from 6 to 12 GHz is proposed as feed for Cassegrain reflector. The feed phase center distance is 0.65 λ0 and 1.3 λ0 at lowest and highest operating frequency respectively. Sum (Σ) and Diff (Δ) radiation pattern of the feed array are measured in anechoic
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Low frequency scattering simulation of homogeneous objects in layered medium by Muller formed SIE Electromagnetics (IF 0.8) Pub Date : 2023-02-12 Yi Ren, Jian Mei Zhou
ABSTRACT This paper presents a novel approach to accurately simulate the low frequency electromagnetic scattering of a homogeneous dielectric object in layered medium. The N-Muller surface integral equation (SIE) is utilized for accurate electromagnetic modeling at low frequency with a properly designed coefficient to cancel frequency singularity. Matrix-friendly layered medium Green’s functions are
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Ultra-wideband circularly polarized millimeter wave antenna based on adjacent coupled feed Electromagnetics (IF 0.8) Pub Date : 2023-02-08 Shuqi Wang, Haonan Zhang, Zexi Li
ABSTRACT In order to improve the performance of 5 G Millimeter wave, a new gap-coupled fed ultra-wideband circularly polarized antenna is proposed. Firstly, by fabricating the top structure of the slot antenna ,a C-shaped patch structure can adjust the surface transverse current as well as the longitudinal current to generate circularly polarized waves; then the feed structure at the bottom layer of
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Inhomogeneous wave equation, Liénard-Wiechert potentials, and Hertzian dipoles in Weber electrodynamics Electromagnetics (IF 0.8) Pub Date : 2023-01-08 S. Kühn
ABSTRACT Aiming to bypass the Lorentz force, this study analyzes Maxwell’s equations from the perspective of a receiver at rest. This approach is necessary because experimental results suggest that the general validity of the Lorentz force might be questionable in non-stationary cases. Calculations in the receiver’s rest frame are complicated and, thus, are rarely performed. In particular, the most
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Development of a fully planar logarithmic spiral antenna with integrated balun in UWB GPR systems for landmines detection Electromagnetics (IF 0.8) Pub Date : 2023-01-05 Narek Grigoor-Feghi, Reza Masoumi, Robab Kazemi
ABSTRACT In this paper, a compact cavity-backed logarithmic spiral antenna with an integrated broadband planar balun is presented. This fully planar antenna is used for detection of anti-personnel (AP) landmines in GPR systems. Unlike conventional spiral antennas, which are fed by unbalanced coaxial cable or vertical baluns, and these feed lines make them bulky and frail, in this design, a microstrip-to-parallel
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A new wideband CP antenna with a single-layer metasurface Electromagnetics (IF 0.8) Pub Date : 2023-01-03 Yuan Chi
ABSTRACT In this paper, a new wideband circularly polarized (CP) antenna with a single-layer metasurface (MT) is developed. The single-layer MT consists of 4 × 4 truncated corner square patch cells with corner-cut square slots. Compared to the single truncated corner square patch, introducing corner-cut square slot can increase the design flexibility by changing the slot size for a wider CP operating
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Design of a planar filtering power divider with wide-stopband suppression Electromagnetics (IF 0.8) Pub Date : 2023-01-03 Honggang Hao, Huan Xu, Qinxuan Ling, Yunrui Wang
ABSTRACT According to the development demand for radio frequency module function integration, a filtering power divider with wideband external suppression and high isolation is designed based on the traditional Wilkinson power divider. The working mechanism of the device is analyzed by using the odd-even mode method. Utilizing the branch loading on the coupled-line and the addition of a step impedance
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Time reversal mirror for hyperthermia of multi-focal breast tumors using electromagnetic time reversal technique Electromagnetics (IF 0.8) Pub Date : 2022-12-28 Baidenger Agyekum Twumasi, Jia-Lin Li, Ebenezer Tawiah Ashong, Christian Dzah, Dustin Pomary
ABSTRACT Motivated by the quest to curtail the high mortality rate of breast cancer, the manuscript proposes the sensitivity enhancement of monopole antenna for hyperthermia application by using electromagnetic time reversal (EMTR) technique with transformation structures for early treatment of multi-focal breast tumors. The EMTR technique is characterized with temporal and spatial focusing, hence