Pub Date : 2023-07-04DOI: 10.1080/02726343.2023.2244832
Yanfeng Geng, Huihui Gao, G. Han, L. Han, H. 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 two resonant modes. By combining these four resonant modes, a wideband characteristic is achieved. In order to reduce the cross-polarization, four U-shaped branches are introduced, and then the cross-polarization levels are decreased from −2 dB to −13 dB. A prototype with a compact size of 0.6λ0 ×0.56λ0 ×0.012λ0 (λ0 is the wavelength in free space at center frequency) is fabricated and tested. Measurement shows that effective bandwidth is 1.8–5.6 GHz (102.7%), the measured gain variation is only 1.3 dBi, and omnidirectional radiation patterns are achieved over the operating band.
摘要提出了一种基于多谐振模式的带寄生环的宽带全向偶极天线，用于WLAN，5 G Sub-6 GHz和RFID应用。该天线由一个具有共面条带的规则偶极子和一个具有四个U形分支的寄生环组成。具有共面条带的规则偶极子用于产生两种谐振模式，其周围的寄生环产生另外两种谐振模。通过组合这四种谐振模式，实现了宽带特性。为了减少交叉极化，引入了四个U形分支，然后将交叉极化水平从−2降低 dB至−13 dB。制作并测试了一个紧凑尺寸为0.6λ0×0.56λ0×0.012λ0（λ0是中心频率下自由空间中的波长）的原型。测量表明，有效带宽为1.8–5.6 GHz（102.7%），测量的增益变化仅为1.3dBi，并且在工作频带上实现了全向辐射方向图。
{"title":"A wideband omnidirectional dipole antenna with parasitic loop based on multi-resonant modes","authors":"Yanfeng Geng, Huihui Gao, G. Han, L. Han, H. Yuan, Wenmei Zhang","doi":"10.1080/02726343.2023.2244832","DOIUrl":"https://doi.org/10.1080/02726343.2023.2244832","url":null,"abstract":"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 two resonant modes. By combining these four resonant modes, a wideband characteristic is achieved. In order to reduce the cross-polarization, four U-shaped branches are introduced, and then the cross-polarization levels are decreased from −2 dB to −13 dB. A prototype with a compact size of 0.6λ0 ×0.56λ0 ×0.012λ0 (λ0 is the wavelength in free space at center frequency) is fabricated and tested. Measurement shows that effective bandwidth is 1.8–5.6 GHz (102.7%), the measured gain variation is only 1.3 dBi, and omnidirectional radiation patterns are achieved over the operating band.","PeriodicalId":50542,"journal":{"name":"Electromagnetics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46980829","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}
Pub Date : 2023-07-04DOI: 10.1080/02726343.2023.2244841
Goksel Turan, H. 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 slots to the ground. The antenna works between and GHz with a gain that varies between to dBi, a bandwidth of , and an efficiency of more than . The antenna has a very compact size of ( is the wavelength for the lowest operating frequency). The simulation and measurement results are in good agreement. The antenna has highly stable end-fire radiation within its operating frequency and can be used for wideband wireless communication systems.
{"title":"A wideband quasi-Yagi antenna using symmetrical slots on the ground plane","authors":"Goksel Turan, H. Odabasi","doi":"10.1080/02726343.2023.2244841","DOIUrl":"https://doi.org/10.1080/02726343.2023.2244841","url":null,"abstract":"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 slots to the ground. The antenna works between and GHz with a gain that varies between to dBi, a bandwidth of , and an efficiency of more than . The antenna has a very compact size of ( is the wavelength for the lowest operating frequency). The simulation and measurement results are in good agreement. The antenna has highly stable end-fire radiation within its operating frequency and can be used for wideband wireless communication systems.","PeriodicalId":50542,"journal":{"name":"Electromagnetics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48354174","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}
Pub Date : 2023-07-04DOI: 10.1080/02726343.2023.2244833
Sanjay Bhilegaonkar, P. 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 modal SIW hybrid couplers. The sum and difference signals required by the monopulse antenna are generated with the proper orientation of couplers. The in-phase and out-phase characteristics of the couplers are generated using TE102 and TE201 orthogonal degenerate modes. A complete planar and compact SIW structure has a footprint of 58.2 mm × 58.2 mm. MCNS is fabricated on a single-layer Rogers RO4003 substrate with a permittivity of 3.55 and thickness of 0.787 mm using a photo-lithographic process. MCNS provides excellent return loss characteristics at all input and output ports. It measured the isolation better than 20 dB for all output ports in the desired frequency band. It achieved good coupling between all input and output ports. Simulation and measured results show that at 10 GHz, MCNS gives better performance parameters and can be used in monopulse antenna.
本文首次提出了一种采用模态基片-集成波导(SIW)混合耦合器的新型紧凑型单脉冲比较器网络系统(MCNS)。本研究的主要目的是基于回波损耗和耦合系数来评估双平面MCNS的性能。采用四模态SIW混合耦合器对双平面MCNS进行了详细的分析、设计和实现。单脉冲天线所需的和和差分信号是在适当的耦合器方向下产生的。采用TE102和TE201正交简并模式生成了耦合器的同相和出相特性。完整的平面紧凑SIW结构占地面积为58.2 mm × 58.2 mm。MCNS采用光刻工艺在单层Rogers RO4003衬底上制作，其介电常数为3.55，厚度为0.787 mm。MCNS在所有输入和输出端口都具有优异的回波损耗特性。测量结果表明，在所需频带内，所有输出端口的隔离度均优于20 dB。它实现了所有输入输出端口之间的良好耦合。仿真和实测结果表明，在10 GHz时，MCNS具有较好的性能参数，可用于单脉冲天线。
{"title":"Dual Plane Monopulse Comparator Network System using Substrate Integrated Waveguide Hybrid Coupler","authors":"Sanjay Bhilegaonkar, P. Mane","doi":"10.1080/02726343.2023.2244833","DOIUrl":"https://doi.org/10.1080/02726343.2023.2244833","url":null,"abstract":"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 modal SIW hybrid couplers. The sum and difference signals required by the monopulse antenna are generated with the proper orientation of couplers. The in-phase and out-phase characteristics of the couplers are generated using TE102 and TE201 orthogonal degenerate modes. A complete planar and compact SIW structure has a footprint of 58.2 mm × 58.2 mm. MCNS is fabricated on a single-layer Rogers RO4003 substrate with a permittivity of 3.55 and thickness of 0.787 mm using a photo-lithographic process. MCNS provides excellent return loss characteristics at all input and output ports. It measured the isolation better than 20 dB for all output ports in the desired frequency band. It achieved good coupling between all input and output ports. Simulation and measured results show that at 10 GHz, MCNS gives better performance parameters and can be used in monopulse antenna.","PeriodicalId":50542,"journal":{"name":"Electromagnetics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48089300","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}
Pub Date : 2023-05-19DOI: 10.1080/02726343.2023.2230065
H. Dalili Oskouei, H. Dehjouriyan, M. M. 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. Impedance bandwidth of the proposed antenna is a very wide bandwidth compared to the previous dielectric antennas. The antenna gain is about 9.6 dB.
{"title":"A novel wideband dielectric resonator antenna with compact size","authors":"H. Dalili Oskouei, H. Dehjouriyan, M. M. Shirkolaei","doi":"10.1080/02726343.2023.2230065","DOIUrl":"https://doi.org/10.1080/02726343.2023.2230065","url":null,"abstract":"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. Impedance bandwidth of the proposed antenna is a very wide bandwidth compared to the previous dielectric antennas. The antenna gain is about 9.6 dB.","PeriodicalId":50542,"journal":{"name":"Electromagnetics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41836098","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}
Pub Date : 2023-05-19DOI: 10.1080/02726343.2023.2230064
Miguel-Antonio Romero-Ramirez, J. Olvera-Cervantes, T. Kataria, A. 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. This topology introduces TZs on either side of the passband edges, improving the selectivity on one side of the passband. The non-adjacent resonators of the single-band trisection balanced filter are based on a Pi-network balanced resonator which is composed by six transmission lines (TLs) and two inductors (Ls). The differential-mode (DM) and common-mode (CM) resonances can be chosen independently with a proper selection of the impedances and the electrical lengths of TLs in order to have high DM stopband and intrinsic high common mode rejection (CMR). The Pi-network was modified and analyzed under the even and odd mode technique to have a dual-band behavior. Good agreement between simulation and measurement was achieved.
{"title":"Balanced single/dual band trisection filters","authors":"Miguel-Antonio Romero-Ramirez, J. Olvera-Cervantes, T. Kataria, A. Corona‐Chavez","doi":"10.1080/02726343.2023.2230064","DOIUrl":"https://doi.org/10.1080/02726343.2023.2230064","url":null,"abstract":"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. This topology introduces TZs on either side of the passband edges, improving the selectivity on one side of the passband. The non-adjacent resonators of the single-band trisection balanced filter are based on a Pi-network balanced resonator which is composed by six transmission lines (TLs) and two inductors (Ls). The differential-mode (DM) and common-mode (CM) resonances can be chosen independently with a proper selection of the impedances and the electrical lengths of TLs in order to have high DM stopband and intrinsic high common mode rejection (CMR). The Pi-network was modified and analyzed under the even and odd mode technique to have a dual-band behavior. Good agreement between simulation and measurement was achieved.","PeriodicalId":50542,"journal":{"name":"Electromagnetics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45449579","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}
Pub Date : 2023-05-19DOI: 10.1080/02726343.2023.2221128
S. 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 ratio of the upper wall to the side walls. By increasing this ratio, the HPBW of the antenna can be increased. To confirm the concept of beam widening method, a prototype of the corrugated DRA is fabricated and measured. Measured results show an impedance bandwidth of 23% (3.8–4.8 GHz). The measured E- and H-plane HPBWs at 4.1 GHz are 137° and 123°, respectively. Measured and simulated results are in a good agreement.
{"title":"Novel corrugated rectangular dielectric resonator antenna with wide half power beam width","authors":"S. Fakhte","doi":"10.1080/02726343.2023.2221128","DOIUrl":"https://doi.org/10.1080/02726343.2023.2221128","url":null,"abstract":"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 ratio of the upper wall to the side walls. By increasing this ratio, the HPBW of the antenna can be increased. To confirm the concept of beam widening method, a prototype of the corrugated DRA is fabricated and measured. Measured results show an impedance bandwidth of 23% (3.8–4.8 GHz). The measured E- and H-plane HPBWs at 4.1 GHz are 137° and 123°, respectively. Measured and simulated results are in a good agreement.","PeriodicalId":50542,"journal":{"name":"Electromagnetics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48559767","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}
Pub Date : 2023-05-19DOI: 10.1080/02726343.2023.2227471
Chan Bai, Shuai Zhang, Qi Gong, Zixuan Song, Yu-Guo 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 structure, using Γ-shaped coupling probes, is applied. The proposed smartphone antenna consists of eight elements with a size of 23.8 mm × 3.5 mm × 0.94 mm. Experiments show that the TCDA can support a minimum realized gain of 9.51 dB and 9.07 dB for pol-x and pol-y, respectively, within 5 G mmW bands. To verify the design concept, TCDA is fabricated and measured, which achieves 60° scanning without grating lobes. The measurement results demonstrate that the proposed antenna is well suited for future 5 G mmW mobile phones.
提出了一种适用于5g毫米波(mmW)的基于紧密耦合偶极子阵列(TCDA)的小型化双极化智能手机天线。天线单元尺寸为2.94 mm × 3.05 mm × 0.94 mm, pol-x和pol-y的VSWR分别为91.5%和88.4%。为了实现低成本，紧凑的尺寸，并减少端口的数量，一个特定的微型进料结构，使用Γ-shaped耦合探头，被应用。该智能手机天线由8个单元组成，尺寸为23.8 mm × 3.5 mm × 0.94 mm。实验表明，TCDA在5g毫米波频段内，pol-x和pol-y的最小实现增益分别为9.51 dB和9.07 dB。为了验证设计理念，制作并测量了TCDA，实现了无光栅瓣的60°扫描。测试结果表明，该天线非常适合未来的5g毫米波移动电话。
{"title":"A Wideband Dual-Polarized Tightly Coupled Array with Compact Size for 5G Millimeter-wave Mobile Devices","authors":"Chan Bai, Shuai Zhang, Qi Gong, Zixuan Song, Yu-Guo Liu","doi":"10.1080/02726343.2023.2227471","DOIUrl":"https://doi.org/10.1080/02726343.2023.2227471","url":null,"abstract":"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 structure, using Γ-shaped coupling probes, is applied. The proposed smartphone antenna consists of eight elements with a size of 23.8 mm × 3.5 mm × 0.94 mm. Experiments show that the TCDA can support a minimum realized gain of 9.51 dB and 9.07 dB for pol-x and pol-y, respectively, within 5 G mmW bands. To verify the design concept, TCDA is fabricated and measured, which achieves 60° scanning without grating lobes. The measurement results demonstrate that the proposed antenna is well suited for future 5 G mmW mobile phones.","PeriodicalId":50542,"journal":{"name":"Electromagnetics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44053241","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}
Pub Date : 2023-05-19DOI: 10.1080/02726343.2023.2221127
Mehdi Shirichian, M. A. Khak, F. Ghorbani, Farid Nazari, A. Nikfal, F. Mazlumi, H. 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 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.
{"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":null,"pages":null},"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}
Pub Date : 2023-05-19DOI: 10.1080/02726343.2023.2234715
Liqin Liu, M. 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 transmission zeros at 2.9 GHz and 5.1 GHz, realizing high selectivity. With a wideband bandstop filter on the input port, a wide stopband from 4.6 GHz to 17.3 GHz is realized.
{"title":"Design of a dual-band filter with high selectivity and wide stopband","authors":"Liqin Liu, M. Weng, Wen-Yen Hsu, Huang-Sheng Lai, Ru‐Yuan Yang","doi":"10.1080/02726343.2023.2234715","DOIUrl":"https://doi.org/10.1080/02726343.2023.2234715","url":null,"abstract":"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 transmission zeros at 2.9 GHz and 5.1 GHz, realizing high selectivity. With a wideband bandstop filter on the input port, a wide stopband from 4.6 GHz to 17.3 GHz is realized.","PeriodicalId":50542,"journal":{"name":"Electromagnetics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45625449","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}
Pub Date : 2023-04-03DOI: 10.1080/02726343.2023.2206266
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 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.
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