Electromagnetics最新文献_第6页

External mutual coupling between inclined slots cut in the narrow wall of a rectangular waveguide 矩形波导窄壁上切出的斜槽之间的外部相互耦合

IF 0.8 4区工程技术

Electromagnetics Pub Date : 2023-05-19 DOI: 10.1080/02726343.2023.2221127

Mehdi Shirichian, M. A. Khak, F. Ghorbani, Farid Nazari, A. Nikfal, F. Mazlumi, H. Aliakbarian

{"title":"External mutual coupling between inclined slots cut in the narrow wall of a rectangular waveguide","authors":"Mehdi Shirichian, M. A. Khak, F. Ghorbani, Farid Nazari, A. Nikfal, F. Mazlumi, H. Aliakbarian","doi":"10.1080/02726343.2023.2221127","DOIUrl":"https://doi.org/10.1080/02726343.2023.2221127","url":null,"abstract":"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 between two slots in the waveguide. The coupling between two slots cut in the narrow wall of a WR-284 waveguide is simulated at 3 GHz and the effect of waveguide wall thickness, slot width, slot angle, and spacing between slots is investigated. Based on our numerical results, a mathematical expression to approximate the external coupling is obtained. In order to verify the results experimentally, a real thin absorber is fabricated and placed between two slots, which are realized in a WR-284 waveguide. Finally, the coupling between the two slots is measured in terms of S-parameters and then converted into a coupling factor. The measured results are shown to have an acceptable agreement compared to the simulation results. The coupling from the simulation is 0.45 at 3 GHz, while this value occurs at 3.1 GHz in the measurement.","PeriodicalId":50542,"journal":{"name":"Electromagnetics","volume":"43 1","pages":"234 - 248"},"PeriodicalIF":0.8,"publicationDate":"2023-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49525439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design of a dual-band filter with high selectivity and wide stopband 高选择性宽阻带双带滤波器的设计

IF 0.8 4区工程技术

Electromagnetics Pub Date : 2023-05-19 DOI: 10.1080/02726343.2023.2234715

Liqin Liu, M. Weng, Wen-Yen Hsu, Huang-Sheng Lai, Ru‐Yuan Yang

引用次数: 0

A metal-only reconfigurable reflectarray antenna for generating diversified circular-polarization focused beams and mode-agile vortex beams 一种用于产生多样化圆偏振聚焦波束和模捷旋波束的全金属可重构反射天线

IF 0.8 4区工程技术

Electromagnetics Pub Date : 2023-04-03 DOI: 10.1080/02726343.2023.2206266

Yuxin Mo, Min Wang, Wei Luo, Yi Ren

{"title":"A metal-only reconfigurable reflectarray antenna for generating diversified circular-polarization focused beams and mode-agile vortex beams","authors":"Yuxin Mo, Min Wang, Wei Luo, Yi Ren","doi":"10.1080/02726343.2023.2206266","DOIUrl":"https://doi.org/10.1080/02726343.2023.2206266","url":null,"abstract":"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 45° steps, the ability of 1-bit phase quantization with orthogonal linear polarization (LP) reconfigurability can be realized. Then, a 26 × 26-elements reconfigurable reflectarray antenna feeding by a linear polarization horn antenna is designed to enable free conversion of line-to-circle polarization at the array level. Full-wave simulations show that the diversified circular-polarization beams can be synthesized by adjusting the aperture element distribution. Furthermore, a manually reconfigurable reflectarray antenna prototype is fabricated to obtain the actual performance of the synthetic LHCP focused beams. The measured maximum gain of the LHCP beams is 27.1 dBi, with the aperture efficiency of 24.2% where the beam point at 20°, and the 1-dB gain bandwidth is 18.0% (9.3 GHz − 11.1 GHz). Finally, mode-agile vortex beams can also be realized by using the proposed reconfigurable reflectarray antenna, and the simulated results show that the mode purity of vortex beams are all above 35% in different modes, and the maximum gain of the vortex beams is 21.1 dBi, with aperture efficiency of 6.1% where the mode of vortex beams is −1.","PeriodicalId":50542,"journal":{"name":"Electromagnetics","volume":"43 1","pages":"187 - 200"},"PeriodicalIF":0.8,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42881809","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Miniaturized and optimized half mode SIW bandpass filter design integrating Hilbert cells as DGS 集成希尔伯特单元作为DGS的小型化和优化的半模SIW带通滤波器设计

IF 0.8 4区工程技术

Electromagnetics Pub Date : 2023-04-03 DOI: 10.1080/02726343.2023.2209965

Mohammed El Amine Chaib, N. Cherif, M. Abri, H. Badaoui

引用次数: 1

A Compact Low Profile, Wideband and High Gain Stacked Dielectric Resonator Antenna 一种紧凑型薄型宽带高增益叠层介质谐振天线

IF 0.8 4区工程技术

Electromagnetics Pub Date : 2023-04-03 DOI: 10.1080/02726343.2023.2206264

Pramod Kumar Gupta, A. Rajput, Manshree Mishra, Biswajeet Mukherjee

引用次数: 3

Ultra-wideband radar cross-section reduction based on phase cancellation 基于相位抵消的超宽带雷达截面缩减

IF 0.8 4区工程技术

Electromagnetics Pub Date : 2023-04-03 DOI: 10.1080/02726343.2023.2206263

B. Lin, Wenzhun Huang, Jianxin Guo, Xiang Ji, Yan Zhou, Yunyan Wu

{"title":"Ultra-wideband radar cross-section reduction based on phase cancellation","authors":"B. Lin, Wenzhun Huang, Jianxin Guo, Xiang Ji, Yan Zhou, Yunyan Wu","doi":"10.1080/02726343.2023.2206263","DOIUrl":"https://doi.org/10.1080/02726343.2023.2206263","url":null,"abstract":"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; moreover, when its unit cell structure is rotated by an angle ψ, ±2ψ Pancharatnam-Berry (PB) phase will be generated in its co-polarized reflection coefficients under CP incidence. Thus, based on the PCM, an ultra-wideband 2-dit coding metasurface is conveniently proposed. Numerical simulations demonstrate that the coding metasurface has excellent RCS reduction performance. Compared with a pure metallic plate with the same size, its RCS can be reduced more than 10 dB under normal incidences with arbitrary polarizations in the ultra-wide frequency band of 6.9–33.1 GHz with a relative bandwidth of 131%. Moreover, when the incident angle is increased to 45°, the RCS reduction performance can be kept well. Finally, one laboratory sample of the coding metasurface is fabricated and measured, a reasonable agreement is observed between the measured and simulated results.","PeriodicalId":50542,"journal":{"name":"Electromagnetics","volume":"43 1","pages":"151 - 162"},"PeriodicalIF":0.8,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46399534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design of a broadband frequency-tunable planar filtering power divider 宽带可调平面滤波功率分配器的设计

IF 0.8 4区工程技术

Electromagnetics Pub Date : 2023-04-03 DOI: 10.1080/02726343.2023.2206265

H. Hao, Huangxia Xu, Qinxuan Ling, Yunrui Wang, Bin Wang

{"title":"Design of a broadband frequency-tunable planar filtering power divider","authors":"H. Hao, Huangxia Xu, Qinxuan Ling, Yunrui Wang, Bin Wang","doi":"10.1080/02726343.2023.2206265","DOIUrl":"https://doi.org/10.1080/02726343.2023.2206265","url":null,"abstract":"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 frequency of the device can be adjusted flexibly by controlling the varactor diode loaded on the two resonators with external voltage. The double branch resonator can realize the broadband frequency adjustability, the step impedance resonator can improve part of the return loss performance of the device, so that the central frequency can achieve high performance in a wide tuning range. The research results show that the center frequency of the designed filtering power divider is adjustable in the range of 1.6 GHz to 2.7 GHz, the tuning bandwidth is 51.2%, the input return loss of each center point is better than 20 dB, and the isolation between output ports is better than 19 dB. The device is expected to be widely used in RF communication systems such as array antennas and transceiver components.","PeriodicalId":50542,"journal":{"name":"Electromagnetics","volume":"43 1","pages":"175 - 186"},"PeriodicalIF":0.8,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43981487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A new wideband circularly polarized square-slot antenna with parasitic elements 一种新型的带寄生元件的宽带圆极化方形缝隙天线

IF 0.8 4区工程技术

Electromagnetics Pub Date : 2023-04-03 DOI: 10.1080/02726343.2023.2206267

Dong Yang, Lichao Hao, ZhenHua Cao, W. Dai

{"title":"A new wideband circularly polarized square-slot antenna with parasitic elements","authors":"Dong Yang, Lichao Hao, ZhenHua Cao, W. Dai","doi":"10.1080/02726343.2023.2206267","DOIUrl":"https://doi.org/10.1080/02726343.2023.2206267","url":null,"abstract":"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 4.8 GHz and improve the axial ratio bandwidth (ARBW). Second, a L-shaped strip etched into the square-slot ground plane is used to enhance the ARBW. Third, a L-shaped branch is inserted into the inverted L-shaped feeding line to improve the impedance matching at high frequencies. At a result, the multiple circularly polarized (CP) resonant points could be excited by using these slot and strips as perturbation elements to alter the surface current distribution of the antenna. To demonstrate the design rationality, a designed antenna model is simulated, manufactured, and measured. The tested results show the proposed antenna has a wider −10-dB impedance bandwidth from 2.6 to 6.6 GHz (86.9%) and a broad 3-dB ARBW from 2.35 to 5.80 GHz (84.7%). In addition, the measured peak gain of the antenna is 4.8 dBi. The presented antenna has a potential application value in C band wireless communication.","PeriodicalId":50542,"journal":{"name":"Electromagnetics","volume":"43 1","pages":"201 - 210"},"PeriodicalIF":0.8,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43479239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Wideband circularly polarized microstrip-slot antenna with parasitic elements 带寄生元件的宽带圆极化微带槽天线

IF 0.8 4区工程技术

Electromagnetics Pub Date : 2023-02-17 DOI: 10.1080/02726343.2023.2192102

W. Dai

引用次数: 0

A novel pattern agile microstrip antenna for modern wireless communication systems 用于现代无线通信系统的新型模式敏捷微带天线

IF 0.8 4区工程技术

Electromagnetics Pub Date : 2023-02-17 DOI: 10.1080/02726343.2023.2192101

Abha Sharma, Ajay Yadav, Amit Rathi

{"title":"A novel pattern agile microstrip antenna for modern wireless communication systems","authors":"Abha Sharma, Ajay Yadav, Amit Rathi","doi":"10.1080/02726343.2023.2192101","DOIUrl":"https://doi.org/10.1080/02726343.2023.2192101","url":null,"abstract":"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 CSRR slot on the ground patch. The CSRR combinations are utilized to change the radiation phase concerning the primary radiating circular patch. The proposed antenna radiation beam can steer from ±15°, 180°, and 0° of the broadside pattern in the elevation plane with a satisfactory gain of 3 dBi. The phase variation for various CSRR combinations concerning the primary antenna is presented. The presented antenna is fabricated on an FR4 substrate and tested in an anechoic environment; the tested results verify the pattern agility of the antenna. The demonstrated antenna is suitable for modern wireless communications like LTE and Cognitive radios. The compact size, simple biasing, and low cost are added advantages of the antenna.","PeriodicalId":50542,"journal":{"name":"Electromagnetics","volume":"43 1","pages":"106 - 118"},"PeriodicalIF":0.8,"publicationDate":"2023-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47323663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2