Pub Date : 2024-03-15DOI: 10.13052/2023.aces.j.381003
Zong-Zhuo Wang, Neng-Wu Liu, Liang Fang
A low-profile dual-polarized filtering microstrip patch antenna (MPA) with improved gain and bandwidth is realized without requirement of filtering circuit. Herein, the characteristic mode analysis (CMA) method is adopted to analyze the antenna performances. Initially, the resonant modes of the MPA are deeply analyzed, which indicates that its resonant frequencies of CM1 and CM3 could be moved close to each other by loading slots and shorting pins, thus broadening the impedance bandwidth. Then, the influence of the slots on radiation patterns of the antenna is further studied. The results demonstrate that the non-broadside radiation beam of its CM1 could be reshaped as the broadside beam, and the sidelobe level of its CM3 could be reduced by cutting the slots, leading to the improved gain. After that, the effect of the pins on the gain-response is investigated, It shows that the gain nulls of the MPA could be controlled at both lower and upper bands, especially for the non-filtering scheme. Finally, the proposed dual-polarized antenna is fabricated and tested. The results prove that its impedance bandwidth reaches to about 7.4% with a low-profile of about 0.038 free-space wavelength. Besides, a stable enhanced gain of around 10 dBi is achieved over the operating band.
{"title":"Low-profile Dual-polarized Filtering Antenna with Improved Gain and Impedance Bandwidth using Characteristic Mode Analysis","authors":"Zong-Zhuo Wang, Neng-Wu Liu, Liang Fang","doi":"10.13052/2023.aces.j.381003","DOIUrl":"https://doi.org/10.13052/2023.aces.j.381003","url":null,"abstract":"A low-profile dual-polarized filtering microstrip patch antenna (MPA) with improved gain and bandwidth is realized without requirement of filtering circuit. Herein, the characteristic mode analysis (CMA) method is adopted to analyze the antenna performances. Initially, the resonant modes of the MPA are deeply analyzed, which indicates that its resonant frequencies of CM1 and CM3 could be moved close to each other by loading slots and shorting pins, thus broadening the impedance bandwidth. Then, the influence of the slots on radiation patterns of the antenna is further studied. The results demonstrate that the non-broadside radiation beam of its CM1 could be reshaped as the broadside beam, and the sidelobe level of its CM3 could be reduced by cutting the slots, leading to the improved gain. After that, the effect of the pins on the gain-response is investigated, It shows that the gain nulls of the MPA could be controlled at both lower and upper bands, especially for the non-filtering scheme. Finally, the proposed dual-polarized antenna is fabricated and tested. The results prove that its impedance bandwidth reaches to about 7.4% with a low-profile of about 0.038 free-space wavelength. Besides, a stable enhanced gain of around 10 dBi is achieved over the operating band.","PeriodicalId":250668,"journal":{"name":"The Applied Computational Electromagnetics Society Journal (ACES)","volume":"118 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140237867","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-15DOI: 10.13052/2023.aces.j.381002
Gengming Wei, Le Chang, Yu Wu
A compact single-layer circularly polarized (CP) antenna array is proposed in this paper for 5G/6G applications. The conventional microstrip line is modified as a feeding network by periodically and alternatively loading field blocking stubs, producing a linearly polarized in-phase radiative field aperture. By adding CP corner-truncated patches beside these in-phase fields, a linear high-gain CP antenna array excited by a single feed is obtained. The feasibility of the proposed design is demonstrated through the fabrication and measurement of a 16-element linear array. The results indicate that the 3 dB axial ratio bandwidth is 3.5% (19.60∼20.30 GHz), the -10 dB impedance bandwidth totally covers the 3 dB axial ratio bandwidth, and the peak realized gain is 14.9 dBi under an antenna length of 5.69λ0. This proposed strategy provides a very compact antenna structure to achieve high-gain CP radiation without the requirement of impedance transformers, phase shifters, and open-stop-band suppressing measures. Moreover, the antenna has a per-unit-length CP gain of 5.5/λ0, which is superior to many single-layer high-gain CPantennas.
本文针对 5G/6G 应用提出了一种紧凑型单层圆极化（CP）天线阵列。通过周期性地交替加载场阻塞存根，将传统微带线修改为馈电网络，从而产生线性极化同相辐射场孔径。通过在这些同相场旁边添加 CP 角截断贴片，可获得由单个馈电激励的线性高增益 CP 天线阵列。通过制作和测量 16 元线性阵列，证明了所提设计的可行性。结果表明，3 dB 轴向比带宽为 3.5%（19.60∼20.30 GHz），-10 dB 阻抗带宽完全覆盖了 3 dB 轴向比带宽，在天线长度为 5.69λ0 的情况下，实现的峰值增益为 14.9 dBi。这一建议策略提供了一种非常紧凑的天线结构，无需阻抗变换器、移相器和开挡带抑制措施即可实现高增益 CP 辐射。此外，该天线的单位长度 CP 增益为 5.5/λ0，优于许多单层高增益 CP 天线。
{"title":"Compact Series-fed Circularly-polarized Patch Array basedon Microstrip Line","authors":"Gengming Wei, Le Chang, Yu Wu","doi":"10.13052/2023.aces.j.381002","DOIUrl":"https://doi.org/10.13052/2023.aces.j.381002","url":null,"abstract":"A compact single-layer circularly polarized (CP) antenna array is proposed in this paper for 5G/6G applications. The conventional microstrip line is modified as a feeding network by periodically and alternatively loading field blocking stubs, producing a linearly polarized in-phase radiative field aperture. By adding CP corner-truncated patches beside these in-phase fields, a linear high-gain CP antenna array excited by a single feed is obtained. The feasibility of the proposed design is demonstrated through the fabrication and measurement of a 16-element linear array. The results indicate that the 3 dB axial ratio bandwidth is 3.5% (19.60∼20.30 GHz), the -10 dB impedance bandwidth totally covers the 3 dB axial ratio bandwidth, and the peak realized gain is 14.9 dBi under an antenna length of 5.69λ0. This proposed strategy provides a very compact antenna structure to achieve high-gain CP radiation without the requirement of impedance transformers, phase shifters, and open-stop-band suppressing measures. Moreover, the antenna has a per-unit-length CP gain of 5.5/λ0, which is superior to many single-layer high-gain CPantennas.","PeriodicalId":250668,"journal":{"name":"The Applied Computational Electromagnetics Society Journal (ACES)","volume":"16 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140238643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-15DOI: 10.13052/2023.aces.j.381006
Liang-Xin Xia, Qi lei Zhou, Neng-Wu Liu, Guang Fu
This paper proposes a low-profile high-isolation dual-polarization array antenna operating in the L/S band. The radiating unit of the array antenna adopts U-shaped bending dipoles to realize the staggered arrangement of high- and low-band units, and is connected to the feeding network by a coaxial cable. To achieve the non-influence of high-band and low-band feed networks, multi-layer printing technology is used and grooves are etched on the metal plate. In order to reduce the coupling of the high- and low-band dipoles at low frequency, a bandpass filter is added to the high-band feed network, which greatly improves the isolation at low-frequency. The measured results show that the impedance bandwidth of the array is 4.5% (0.971-1.015 GHz) and 7.5% (1.89-2.04 GHz), with gains of 15 and 19 dBi at 1 GHz and 2 GHz, respectively. And the isolation between the dual-polarized ports more than 50 dB and 35 dB was achieved at 1 GHz and 2 GHz, respectively. The proposed array will have practical value in L/S band full-duplex wireless communication systems.
{"title":"A Low-profile Dual-band Dual-polarization Co-aperture Array Antenna with High Isolation","authors":"Liang-Xin Xia, Qi lei Zhou, Neng-Wu Liu, Guang Fu","doi":"10.13052/2023.aces.j.381006","DOIUrl":"https://doi.org/10.13052/2023.aces.j.381006","url":null,"abstract":"This paper proposes a low-profile high-isolation dual-polarization array antenna operating in the L/S band. The radiating unit of the array antenna adopts U-shaped bending dipoles to realize the staggered arrangement of high- and low-band units, and is connected to the feeding network by a coaxial cable. To achieve the non-influence of high-band and low-band feed networks, multi-layer printing technology is used and grooves are etched on the metal plate. In order to reduce the coupling of the high- and low-band dipoles at low frequency, a bandpass filter is added to the high-band feed network, which greatly improves the isolation at low-frequency. The measured results show that the impedance bandwidth of the array is 4.5% (0.971-1.015 GHz) and 7.5% (1.89-2.04 GHz), with gains of 15 and 19 dBi at 1 GHz and 2 GHz, respectively. And the isolation between the dual-polarized ports more than 50 dB and 35 dB was achieved at 1 GHz and 2 GHz, respectively. The proposed array will have practical value in L/S band full-duplex wireless communication systems.","PeriodicalId":250668,"journal":{"name":"The Applied Computational Electromagnetics Society Journal (ACES)","volume":"12 18","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140241053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-15DOI: 10.13052/2023.aces.j.381004
Jiaxin Wang, Xiao Liu, Pengfei Zhang, Zheng Xu, Anqi Li, Zhengtian Chen, Jin Fan
A center-fed circularly polarized stacked patch antenna (CF-CPSPA) with enhanced axial-ratio (AR) bandwidth is proposed in this paper. The antenna is composed of two microstrip patches, the lower patch consists of a circular pad, an elliptical-ring, and two branch lines connecting them, which is used to realize the center-fed condition, and the upper patch is an elliptical patch to achieve the wide band performance. Firstly, two center-fed linearly polarized stacked patch antennas with wide band are designed, one mode radiated with x polarization, and the other generates y polarized radiation. Next, the orthogonal modes of two linearly polarized antennas are combined together by a specific design. Finally, the approximate equal amplitude and quadrature phase difference of the introduced modes are achieved in the operating frequency band with proper parameters analysis. And the impedance bandwidth and 3dB AR bandwidth is improved to 30.4% and 16.5%.
本文提出了一种具有增强轴向比（AR）带宽的中心馈电圆极化叠层贴片天线（CF-CPSPA）。该天线由两个微带贴片组成，下部贴片由一个圆垫、一个椭圆环和连接它们的两条支线组成，用于实现中心馈电条件，上部贴片为椭圆贴片，以实现宽带性能。首先，设计了两个中心馈电线性极化的宽带叠层贴片天线，其中一个模式以 x 极化辐射，另一个产生 y 极化辐射。接着，通过特定设计将两个线性极化天线的正交模式组合在一起。最后，通过适当的参数分析，在工作频段内实现了引入模式的近似等幅和正交相位差。阻抗带宽和 3dB AR 带宽分别提高到 30.4% 和 16.5%。
{"title":"Wideband Center-fed Stacked Patch Circularly Polarized Antenna used in Phased Array","authors":"Jiaxin Wang, Xiao Liu, Pengfei Zhang, Zheng Xu, Anqi Li, Zhengtian Chen, Jin Fan","doi":"10.13052/2023.aces.j.381004","DOIUrl":"https://doi.org/10.13052/2023.aces.j.381004","url":null,"abstract":"A center-fed circularly polarized stacked patch antenna (CF-CPSPA) with enhanced axial-ratio (AR) bandwidth is proposed in this paper. The antenna is composed of two microstrip patches, the lower patch consists of a circular pad, an elliptical-ring, and two branch lines connecting them, which is used to realize the center-fed condition, and the upper patch is an elliptical patch to achieve the wide band performance. Firstly, two center-fed linearly polarized stacked patch antennas with wide band are designed, one mode radiated with x polarization, and the other generates y polarized radiation. Next, the orthogonal modes of two linearly polarized antennas are combined together by a specific design. Finally, the approximate equal amplitude and quadrature phase difference of the introduced modes are achieved in the operating frequency band with proper parameters analysis. And the impedance bandwidth and 3dB AR bandwidth is improved to 30.4% and 16.5%.","PeriodicalId":250668,"journal":{"name":"The Applied Computational Electromagnetics Society Journal (ACES)","volume":"7 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140237536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A novel four-way substrate integrated waveguide (SIW) filtering power divider (FPD) with in-phase and out-of-phase characteristics and a large power division ratio (PDR) is presented in this work. The frequency selection and power division functions are effectively realized by employing SIW resonators at the bottom layer and at microstrip sections at the top layer, respectively. Four microstrip lines coupled with SIW cavity through a slotline realize in-phase and two out-of-phase output characteristics and a large PDR of 7:1. To verify the design method, a four-way prototype with PDR of 7:7:1:1 is designed, fabricated, and measured. Results exhibit good filtering performance, large power division ratio, and in-phase and out-of-phase characteristics.
{"title":"Four-way SIW Filtering Power Divider with In- and Out-of-phase Characteristics and Large Power Division Ratio","authors":"Minghan Shu, Nengcai Huang, Qiyue Gao, Chenxin Ma, Xin Zhou","doi":"10.13052/2023.aces.j.381009","DOIUrl":"https://doi.org/10.13052/2023.aces.j.381009","url":null,"abstract":"A novel four-way substrate integrated waveguide (SIW) filtering power divider (FPD) with in-phase and out-of-phase characteristics and a large power division ratio (PDR) is presented in this work. The frequency selection and power division functions are effectively realized by employing SIW resonators at the bottom layer and at microstrip sections at the top layer, respectively. Four microstrip lines coupled with SIW cavity through a slotline realize in-phase and two out-of-phase output characteristics and a large PDR of 7:1. To verify the design method, a four-way prototype with PDR of 7:7:1:1 is designed, fabricated, and measured. Results exhibit good filtering performance, large power division ratio, and in-phase and out-of-phase characteristics.","PeriodicalId":250668,"journal":{"name":"The Applied Computational Electromagnetics Society Journal (ACES)","volume":"34 133","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140237074","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-15DOI: 10.13052/2023.aces.j.381007
Tongyu Ding, Haobin Yang, Zhiwei Chen, Zhen Lin, Bin He, Chong-Zhi Han
This paper proposes a 4-element multiple-input multiple-output (MIMO) antenna system, which is intended for ultra-wideband (UWB) applications. The antenna has a dimension of 92 × 70 × 1.6 mm3. It achieves element isolation via the defected ground structure (DGS) and symmetric E-shaped branch structures design. The realized operating bandwidth is from 3 GHz to 18 GHz, with 15 dB isolation within the whole wide band. The envelope correlation coefficient (ECC) is less than 0.01 with diversity gain (DG) greater than 9.95. The prototype is fabricated and measured to verify its potential applications for UWB MIMO communication.
{"title":"A 4-Element UWB MIMO Antenna System with High Isolation Performance","authors":"Tongyu Ding, Haobin Yang, Zhiwei Chen, Zhen Lin, Bin He, Chong-Zhi Han","doi":"10.13052/2023.aces.j.381007","DOIUrl":"https://doi.org/10.13052/2023.aces.j.381007","url":null,"abstract":"This paper proposes a 4-element multiple-input multiple-output (MIMO) antenna system, which is intended for ultra-wideband (UWB) applications. The antenna has a dimension of 92 × 70 × 1.6 mm3. It achieves element isolation via the defected ground structure (DGS) and symmetric E-shaped branch structures design. The realized operating bandwidth is from 3 GHz to 18 GHz, with 15 dB isolation within the whole wide band. The envelope correlation coefficient (ECC) is less than 0.01 with diversity gain (DG) greater than 9.95. The prototype is fabricated and measured to verify its potential applications for UWB MIMO communication.","PeriodicalId":250668,"journal":{"name":"The Applied Computational Electromagnetics Society Journal (ACES)","volume":"32 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140239956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-15DOI: 10.13052/2023.aces.j.381001
Qiyue Gao, Yuyao Zhu, Xinyu Yang, Rui Li
In this paper, a compact integrated circular polarization filtering antenna is proposed based on substrate integrated waveguide (SIW) cavity. Firstly, a dual-mode (TE102 and TE201 modes) rectangular cavity is utilized as a common feeding cavity to achieve a dual-mode filtering response. And then, an additional rectangular patch with a slot is coupled from the feeding cavity for circular polarization radiation. To verify the proposed concept, a prototype circular polarization filtering antenna is simulated. The circular polarized filtering antenna resonates at 4.225 GHz with a low cross-polarization and a high gain of 7.23 dBi.
{"title":"Compact Integrated Circular Polarization Filtering Antenna based on SIW Cavity","authors":"Qiyue Gao, Yuyao Zhu, Xinyu Yang, Rui Li","doi":"10.13052/2023.aces.j.381001","DOIUrl":"https://doi.org/10.13052/2023.aces.j.381001","url":null,"abstract":"In this paper, a compact integrated circular polarization filtering antenna is proposed based on substrate integrated waveguide (SIW) cavity. Firstly, a dual-mode (TE102 and TE201 modes) rectangular cavity is utilized as a common feeding cavity to achieve a dual-mode filtering response. And then, an additional rectangular patch with a slot is coupled from the feeding cavity for circular polarization radiation. To verify the proposed concept, a prototype circular polarization filtering antenna is simulated. The circular polarized filtering antenna resonates at 4.225 GHz with a low cross-polarization and a high gain of 7.23 dBi.","PeriodicalId":250668,"journal":{"name":"The Applied Computational Electromagnetics Society Journal (ACES)","volume":"19 24","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140239175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-15DOI: 10.13052/2023.aces.j.381010
Zhou-Qiao Dai, Chunyu Li, Junda Yan, Tiancheng Zhang, H. Bao
A 25-40 GHz monolithic low-noise amplifier (LNA) is designed and fabricated with the 100 nm gallium nitride on silicon carbide (GaN-on-SiC) technology. This four-stage-cascade monolithic LNA performs a low DC power consumption of 150 mW and noise figure of 1.6-2.2 dB. Moreover, the gain of 34-37 dB with the continuous wave of more than 2 W over 24 hours can be achieved covering the operating bandwidth. Hence, this state-of-art LNA possesses a great potential to be directly integrated with GaN power amplifiers and other microwave components to realize the high-integration, high-reliability, and high-power RF front-end.
{"title":"A Low-power, High-gain and Excellent Noise Figure GaN-on-SiC LNA Monolithic Microwave Integrated Circuit (MMIC) operating at Ka-band for 5G/6G Application","authors":"Zhou-Qiao Dai, Chunyu Li, Junda Yan, Tiancheng Zhang, H. Bao","doi":"10.13052/2023.aces.j.381010","DOIUrl":"https://doi.org/10.13052/2023.aces.j.381010","url":null,"abstract":"A 25-40 GHz monolithic low-noise amplifier (LNA) is designed and fabricated with the 100 nm gallium nitride on silicon carbide (GaN-on-SiC) technology. This four-stage-cascade monolithic LNA performs a low DC power consumption of 150 mW and noise figure of 1.6-2.2 dB. Moreover, the gain of 34-37 dB with the continuous wave of more than 2 W over 24 hours can be achieved covering the operating bandwidth. Hence, this state-of-art LNA possesses a great potential to be directly integrated with GaN power amplifiers and other microwave components to realize the high-integration, high-reliability, and high-power RF front-end.","PeriodicalId":250668,"journal":{"name":"The Applied Computational Electromagnetics Society Journal (ACES)","volume":"23 57","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140240076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-15DOI: 10.13052/2023.aces.j.381008
Shu-Wei Yu, Xiao Zhang, Qiong‐Sen Wu, Lei Zhu, Tao Yuan, Xianqin Hu
A high-precision cavity model of resistor-loaded patch antenna (RLPA) with adjustable gain is proposed and rigorously studied in this article. In our analysis, the loaded resistors are perceived as controlled current sources, thus the RLPA can be solved as a modified cavity model. Accurate expressions of field distribution, input impedance, and radiation patterns are derived in this way, and a gratifying agreement has been achieved between the calculated and simulated results. Based on this approach, RLPAs for indoor motion radar are designed and analyzed. Comprehensive analysis is conducted to reveal the loading effect on radiation gain, radiation efficiency, and quality factor of RLPAs under various circumstances. Through altering the value of the loaded resistance, its radiation gain and coverage range can be flexibly adjusted. Besides, enhanced operating bandwidth and improved performance stability are also achieved due to the loaded resistors. Last but not least, several indoor motion radars based on the proposed patches are carried out and measured, which demonstrates the validity of the proposed method and design.
{"title":"Rigorous Analysis and Design of Resistor-Loaded Patch Antennas with Flexible Gain for Indoor Radar Sensors","authors":"Shu-Wei Yu, Xiao Zhang, Qiong‐Sen Wu, Lei Zhu, Tao Yuan, Xianqin Hu","doi":"10.13052/2023.aces.j.381008","DOIUrl":"https://doi.org/10.13052/2023.aces.j.381008","url":null,"abstract":"A high-precision cavity model of resistor-loaded patch antenna (RLPA) with adjustable gain is proposed and rigorously studied in this article. In our analysis, the loaded resistors are perceived as controlled current sources, thus the RLPA can be solved as a modified cavity model. Accurate expressions of field distribution, input impedance, and radiation patterns are derived in this way, and a gratifying agreement has been achieved between the calculated and simulated results. Based on this approach, RLPAs for indoor motion radar are designed and analyzed. Comprehensive analysis is conducted to reveal the loading effect on radiation gain, radiation efficiency, and quality factor of RLPAs under various circumstances. Through altering the value of the loaded resistance, its radiation gain and coverage range can be flexibly adjusted. Besides, enhanced operating bandwidth and improved performance stability are also achieved due to the loaded resistors. Last but not least, several indoor motion radars based on the proposed patches are carried out and measured, which demonstrates the validity of the proposed method and design.","PeriodicalId":250668,"journal":{"name":"The Applied Computational Electromagnetics Society Journal (ACES)","volume":"8 24","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140240987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-02-18DOI: 10.13052/2023.aces.j.380911
Hailong Liu, Jinbo Liu, Xiaoxia Nie, Jiming Song, Zengrui Li
The radiation characteristics of circular arc antennas are studied by applying the method of moments (MoM) to solve the electric field integral equation (EFIE). Based on the triangular current distribution of small circular arc antennas, the analytical expression of radiation fields of circular arc antennas is derived. It is found that the circular arc antenna is equivalent to a superposition of an electric dipole and a magnetic dipole, resulting in near isotropic radiation pattern. Finally, both MoM and CST simulations show that the small arc antenna can realize the near isotropic radiation pattern.
{"title":"Research on Quasi-isotropic Radiation of Small Circular Arc Antenna","authors":"Hailong Liu, Jinbo Liu, Xiaoxia Nie, Jiming Song, Zengrui Li","doi":"10.13052/2023.aces.j.380911","DOIUrl":"https://doi.org/10.13052/2023.aces.j.380911","url":null,"abstract":"The radiation characteristics of circular arc antennas are studied by applying the method of moments (MoM) to solve the electric field integral equation (EFIE). Based on the triangular current distribution of small circular arc antennas, the analytical expression of radiation fields of circular arc antennas is derived. It is found that the circular arc antenna is equivalent to a superposition of an electric dipole and a magnetic dipole, resulting in near isotropic radiation pattern. Finally, both MoM and CST simulations show that the small arc antenna can realize the near isotropic radiation pattern.","PeriodicalId":250668,"journal":{"name":"The Applied Computational Electromagnetics Society Journal (ACES)","volume":"5 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139958990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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