International Journal of RF and Microwave Computer-Aided Engineering最新文献_第9页

Mitigating Thermal Focusing in Microwave Heating of Cylindrical Loads by Resonant Rings 用共振环减轻圆柱载荷微波加热中的热聚焦

IF 0.9 4区工程技术

International Journal of RF and Microwave Computer-Aided Engineering Pub Date : 2023-10-25 DOI: 10.1155/2023/1668006

Fengming Yang, Xueting Yan, Huacheng Zhu, Yang Yang, Kama Huang

引用次数: 0

Performance Analysis of a Reconfigurable Mixer Using Particle Swarm Optimization 基于粒子群优化的可重构混频器性能分析

IF 0.9 4区工程技术

International Journal of RF and Microwave Computer-Aided Engineering Pub Date : 2023-10-20 DOI: 10.1155/2023/3786691

Shilpa Mehta, Xue Jun Li, Massimo Donelli

{"title":"Performance Analysis of a Reconfigurable Mixer Using Particle Swarm Optimization","authors":"Shilpa Mehta, Xue Jun Li, Massimo Donelli","doi":"10.1155/2023/3786691","DOIUrl":"10.1155/2023/3786691","url":null,"abstract":"<div>\u0000 <p>In this article, a novel 1.8-5 GHz downconversion mixer is presented. The mixer is designed and simulated using SiGe 8HP 130 nm CMOS process technology. The proposed mixer is implemented by incorporating a double-balanced configuration, active inductor, and current mirror techniques. For performance optimization of the proposed mixer, different algorithms such as the genetic algorithm (GA), inclined plane system optimization (IPO) algorithm, and particle swarm optimization (PSO) algorithm have been used. Compared to existing works, this design shows an enhanced conversion gain (CG), a third-order input intercept point (IIP3), and return loss (<i>S</i><sub>11</sub>) at the expense of the noise figure (NF). Additionally, the design consumes low power and covers a small chip area compared to other state-of-the-art devices. PSO shows the most promising results when compared to other optimization algorithms’ results. According to the measurement results after PSO optimization, the mixer attains a maximum CG of 25 dB, an IIP3 of 4 dBm, and a NF of 5.2 dB at 5 GHz, while consuming only 15 mW of DC power. The mixer operates at 1.2 V and covers 0.8 mm<sup>2</sup> die area.</p>\u0000 </div>","PeriodicalId":54944,"journal":{"name":"International Journal of RF and Microwave Computer-Aided Engineering","volume":"2023 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2023/3786691","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135567335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Broadband Polarization-Decoupled Metasurface for Generating Tailored Dual-Polarization Conical Beams 用于产生定制双偏振锥形光束的宽带偏振去耦超表面

IF 0.9 4区工程技术

International Journal of RF and Microwave Computer-Aided Engineering Pub Date : 2023-10-14 DOI: 10.1155/2023/3599970

Lingjun Yang, Beier Ying, Sheng Sun

{"title":"Broadband Polarization-Decoupled Metasurface for Generating Tailored Dual-Polarization Conical Beams","authors":"Lingjun Yang, Beier Ying, Sheng Sun","doi":"10.1155/2023/3599970","DOIUrl":"10.1155/2023/3599970","url":null,"abstract":"<div>\u0000 <p>Conical beam antenna plays a significant role in providing stable access to satellite signals for moving communication terminals. Although metasurfaces have been used to generate conical beams, most of them can only reflect conical beams with identically distributed and mirror-symmetric phase responses for left-hand circular polarization and right-hand circular polarization, which can hinder the dual-polarization applications of metasurfaces. In this study, a metasurface is designed to independently manipulate dual-polarized excitations in broadband. To achieve the broadband control of conical beams, broadband conditions for both geometric and propagation phases are developed. Differently, metasurface designed in this study consists of three types of distinguishingly shaped elements, which can provide more degree of freedom in dual-polarization broadband design. In addition, a design method is developed for metasurface to generate the cone angle tailorable conical beams. Via fabricating a metasurface following the proposed method, the designed metasurface is verified in theorem, simulation, and experiment that it can generate desired conical beams with tailored divergent angles and phase responses covering a bandwidth from 12.5 GHz to 17 GHz.</p>\u0000 </div>","PeriodicalId":54944,"journal":{"name":"International Journal of RF and Microwave Computer-Aided Engineering","volume":"2023 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2023/3599970","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135767017","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of a Broadband and High-Gain Circularly Polarized Array of Multilayer Slot Antennas for X-Band Wireless Communication Networks 用于x波段无线通信网络的宽带高增益多层槽天线圆极化阵列的研制

IF 0.9 4区工程技术

International Journal of RF and Microwave Computer-Aided Engineering Pub Date : 2023-10-12 DOI: 10.1155/2023/8701539

Hosein Saghafi, Robab Kazemi, Hamed Hamlbar Gerami

{"title":"Development of a Broadband and High-Gain Circularly Polarized Array of Multilayer Slot Antennas for X-Band Wireless Communication Networks","authors":"Hosein Saghafi, Robab Kazemi, Hamed Hamlbar Gerami","doi":"10.1155/2023/8701539","DOIUrl":"10.1155/2023/8701539","url":null,"abstract":"<div>\u0000 <p>This paper presents a wideband cavity-backed slot antenna array designed for X-band wireless communication systems. The antenna element consists of a circular slot combined with a cross-slotted patch; both are fed by an L-shaped microstrip line through proximity coupling to extend the impedance bandwidth and gain. The reduction of beam squint in the radiation patterns, caused by the asymmetric feed line, is achieved through intelligent optimization of the dimensions and position of the cross slot on the patch. Additionally, a back cavity is included to provide unidirectional radiation and enhance gain. The antenna exhibits right-hand circularly polarized (RHCP) radiation patterns with high gain over a wideband frequency range. To further improve the axial ratio (AR) bandwidth and gain, the antenna is utilized in a 2 × 2 array configuration with a sequential rotation feed network. The overall dimensions of the proposed array are 1.42<i>λ</i><sub>0</sub> × 1.42<i>λ</i><sub>0</sub> × 0.45<i>λ</i><sub>0</sub>, where <i>λ</i><sub>0</sub> represents the wavelength at the center frequency of 10 GHz. The fabricated array is then tested, and the measurements show an impedance bandwidth of 60% (7 GHz-13 GHz) with |<i>S</i><sub>11</sub>| < −10 dB, a 3 dB AR bandwidth of 42% (7.45-11.65 GHz), and a peak gain of 11.14 dB. The simulated and measured results exhibit good agreement, validating the effectiveness of the design.</p>\u0000 </div>","PeriodicalId":54944,"journal":{"name":"International Journal of RF and Microwave Computer-Aided Engineering","volume":"2023 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2023/8701539","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136013200","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design and Analysis of a Low-Profile Dual-Band Circularly Polarized Monopole Antenna Based on Characteristic Mode Analysis 基于特征模态分析的低轮廓双频圆极化单极天线设计与分析

IF 0.9 4区工程技术

International Journal of RF and Microwave Computer-Aided Engineering Pub Date : 2023-10-07 DOI: 10.1155/2023/7855907

Kingsford Sarkodie Obeng Kwakye, Nouman Rasool, Kwame Oteng Gyasi, Joseph Abroquah, Mubarak Sani Ellis, Ohemeng Lord Owusu, Abdul-Rahman Ahmed, Jerry John Kponyo

{"title":"Design and Analysis of a Low-Profile Dual-Band Circularly Polarized Monopole Antenna Based on Characteristic Mode Analysis","authors":"Kingsford Sarkodie Obeng Kwakye, Nouman Rasool, Kwame Oteng Gyasi, Joseph Abroquah, Mubarak Sani Ellis, Ohemeng Lord Owusu, Abdul-Rahman Ahmed, Jerry John Kponyo","doi":"10.1155/2023/7855907","DOIUrl":"10.1155/2023/7855907","url":null,"abstract":"<div>\u0000 <p>This paper presents the design of a simple dual-band circularly polarized monopole antenna using characteristic mode analysis. First, a dual-band elliptically polarized “L”-shaped monopole antenna with a partial ground is designed; then, a rectangular stub and a parasitic structure on the ground plane are implemented to achieve dual-band CP operation. To enhance impedance bandwidth and generate circular polarization in the upper band, the rectangular stub is attached to the “L”-shaped strip. The parasitic structure is employed for simultaneous dual-band CP radiation. Characteristic mode analysis is undertaken to predict the performance of the antenna before excitation. The modal analysis which is undertaken before excitation shows the natural modes that can be excited by the antenna structure to generate a dual-band CP response. The analysis gives approximate bandwidths that can be achieved by the antenna even before excitation. The overall dimension of the antenna <i>is</i> 0.379<i>λ</i><sub>0</sub> × 0.379<i>λ</i><sub>0</sub> × 0.015<i>λ</i><sub>0</sub>, where <i>λ</i><sub>0</sub> is the corresponding free-space wavelength at 5.7 GHz. The measured -10 dB impedance bandwidth (ZBW) is realized to be 75.9% (4.5 GHz–10 GHz). The measured 3 dB axial ratio bandwidths (ARBW) at the lower and upper bands are 6% (5.6 GHz–5.95 GHz) and 28% (6.65 GHz–8.82 GHz), respectively. The proposed antenna features a simple and compact structure for Wi-Fi, WLAN, WiMAX, and C band applications.</p>\u0000 </div>","PeriodicalId":54944,"journal":{"name":"International Journal of RF and Microwave Computer-Aided Engineering","volume":"2023 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2023/7855907","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135251958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Axial Ratio Improvement of Circularly Polarized Antenna Using Parasitic Elements for 5G Applications 基于寄生元件的5G圆极化天线轴比改进

IF 0.9 4区工程技术

International Journal of RF and Microwave Computer-Aided Engineering Pub Date : 2023-10-03 DOI: 10.1155/2023/6619073

Samira Mohammadkhani, Alireza Mallahzadeh

{"title":"Axial Ratio Improvement of Circularly Polarized Antenna Using Parasitic Elements for 5G Applications","authors":"Samira Mohammadkhani, Alireza Mallahzadeh","doi":"10.1155/2023/6619073","DOIUrl":"10.1155/2023/6619073","url":null,"abstract":"<div>\u0000 <p>A circular polarization (CP) antenna that can switch between right-handed circular polarization (RHCP) and left-handed circular polarization (LHCP) modes has been designed and introduced for 5G applications in the 3.5 GHz frequency band in this work. The proposed antenna comprises a crossed dipole fed by a 90° hybrid coupler. The axial ratio (AR) enhancement of 190 MHz is achieved by vertically stacking a substrate with a distance of <i>λ</i>/4 from the ground plane, including an annular ring-shaped parasitic element above a circular-shaped disc. Consequently, by creating surface current rotation on the parasitic elements, the CP performance of the antenna is improved. According to the experiments, a wide impedance bandwidth of 930 MHz (3.19-4.12 GHz) and an overlapped AR bandwidth of 23.5% for both modes are achieved. The overall size of the antenna is 100 × 92.5 × 24 mm<sup>3</sup>, and the gain is stable across the operating frequency band with a peak value of 6.78 dBic.</p>\u0000 </div>","PeriodicalId":54944,"journal":{"name":"International Journal of RF and Microwave Computer-Aided Engineering","volume":"2023 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2023/6619073","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135689806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A High-Frequency Planar-Configured Millimeter-Wave MIMO Antenna for Fifth-Generation NR Operations 面向第五代NR业务的高频平面配置毫米波MIMO天线

IF 0.9 4区工程技术

International Journal of RF and Microwave Computer-Aided Engineering Pub Date : 2023-09-30 DOI: 10.1155/2023/9533725

Poonam Tiwari, Vishant Gahlaut, Meenu Kaushik, Anshuman Shastri, Gulman Siddiqui, Bhupender Singh

{"title":"A High-Frequency Planar-Configured Millimeter-Wave MIMO Antenna for Fifth-Generation NR Operations","authors":"Poonam Tiwari, Vishant Gahlaut, Meenu Kaushik, Anshuman Shastri, Gulman Siddiqui, Bhupender Singh","doi":"10.1155/2023/9533725","DOIUrl":"10.1155/2023/9533725","url":null,"abstract":"<div>\u0000 <p>This article presents a simple planar millimeter-wave (mm-wave) multiple input multiple output (MIMO) antenna with four closely spaced radiating elements. The antenna is intended to enhance the bandwidth for 5G new radio (NR) applications and also cover the industrial Ka-band (26.5-40 GHz), Q-band (30-50 GHz), and U-band (40-60 GHz) frequency ranges. The antenna is designed using Rogers RT/duroid 5880 substrate with a size of 25 × 26 × 1.6 mm<sup>3</sup>. The proposed antenna consists of four identical radiating elements with two of them positioned in a linear configuration facing each other, while the other two elements are placed opposite to the first two, which improves isolation between the elements. Across the entire operating frequency range (26-60 GHz), the antenna demonstrated excellent performance, including 34 GHz wide bandwidth, high isolation of >25 dB, nearly omnidirectional radiation patterns, high gain of 11.1 dB with a high radiation efficiency of 94%, low envelope correlation coefficient (ECC) of 0.0068, and high diversity gain (DG) of 9.967 dB. The simulated findings exhibit a strong positive correlation with the experimental results. The proposed MIMO antenna design is a promising solution for 5G NR applications.</p>\u0000 </div>","PeriodicalId":54944,"journal":{"name":"International Journal of RF and Microwave Computer-Aided Engineering","volume":"2023 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2023/9533725","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136248786","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Differential-to-Common-Mode Noise Conversion Suppression on Right-Angle-Bent Differential Transmission Lines Using 3D-Printed Dielectric Materials 利用3d打印介质材料抑制直角弯曲差分传输线的差共模噪声转换

IF 0.9 4区工程技术

International Journal of RF and Microwave Computer-Aided Engineering Pub Date : 2023-09-20 DOI: 10.1155/2023/1130129

Ook Chung, Hogeun Yoo, Suhyoun Song, Jaehoon Lee

引用次数: 0

A Novel Broadband ± 45° Dual-Polarized Cross-Dipole Antenna with Multimode Resonance 一种新型宽带±45°双极化交叉偶极子多模共振天线

IF 0.9 4区工程技术

International Journal of RF and Microwave Computer-Aided Engineering Pub Date : 2023-09-09 DOI: 10.1155/2023/8847440

Yanzheng Chen, Ali Raza

引用次数: 0

A Compact Horizontal Coaxial to Ridge Gap Waveguide Transition for Ka-Band ka波段紧凑的水平同轴到脊隙波导跃迁

IF 0.9 4区工程技术

International Journal of RF and Microwave Computer-Aided Engineering Pub Date : 2023-09-06 DOI: 10.1155/2023/6477987

Changjian Tao, Haidong Zheng, Chuan Jin

{"title":"A Compact Horizontal Coaxial to Ridge Gap Waveguide Transition for Ka-Band","authors":"Changjian Tao, Haidong Zheng, Chuan Jin","doi":"10.1155/2023/6477987","DOIUrl":"10.1155/2023/6477987","url":null,"abstract":"<div>\u0000 <p>This paper presents a novel type of compact inline coaxial to ridge gap waveguide (RGW) transition, which covers the whole Ka frequency band. The structure connects with the connector′s inner conductor through a rectangular probe directly. The probe is set in nail bed without any extra parts. Hence, a simple and compact transition comes to fruition at the circuit topology level. This transition can be considered as an inhomogeneous stripline, so the characteristic impedance can be analyzed similarly to the stripline. Beyond this, a mounting hole is drilled at rectangular probe to improve the robustness and convenience of assembly without welding or conductive adhesive bonding. To verify the performance of the proposed structure, a back-to-back transition is designed, fabricated, and measured. Measurement results achieve better than 20 dB return loss and about 0.15 dB insertion loss from 26.4 GHz to 40.4 GHz. It corresponds greatly with simulation results and bespeaks valuable in millimeter-wave applications.</p>\u0000 </div>","PeriodicalId":54944,"journal":{"name":"International Journal of RF and Microwave Computer-Aided Engineering","volume":"2023 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1155/2023/6477987","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45487436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0