Iet Microwaves Antennas & Propagation最新文献_第4页

Cross-talk reduction in metamaterial and non-uniform transmission lines 减少超材料和非均匀传输线中的串扰

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2024-05-02 DOI: 10.1049/mia2.12476

Hamid Reza Abbasi, Jalil A. Rashed-Mohassel, Mohammad Naser Moghadasi

引用次数: 0

Low sidelobe planar electrically large sparse array antenna with element number reduction based on genetic algorithm 基于遗传算法减少元素数量的低侧叶平面电大稀疏阵列天线

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2024-05-01 DOI: 10.1049/mia2.12475

Yangkun Zhu, Wenyu Ma, Chuang Wang, Wenquan Cao

{"title":"Low sidelobe planar electrically large sparse array antenna with element number reduction based on genetic algorithm","authors":"Yangkun Zhu, Wenyu Ma, Chuang Wang, Wenquan Cao","doi":"10.1049/mia2.12475","DOIUrl":"https://doi.org/10.1049/mia2.12475","url":null,"abstract":"Conventionally, both electrically larger (EL) arrays and sparse arrays offer the advantage of element number reduction but disadvantage of high sidelobe levels. A new scheme of planar EL sparse array antenna based on a genetic algorithm (GA) to achieve low sidelobe with element number reduction is proposed. To begin with, EL sparse array antenna optimisation models based on GA for both linear and planar arrays are analysed. Then, an EL slot antenna element based on a 3 × 3 substrate integrated waveguide cavity is designed. An 8-element linear EL sparse array antenna is designed and compared with a uniform array antenna, demonstrating a reduction in the maximum sidelobe level (MSLL) by nearly 4.6 dB. After that, a 4 × 8 element planar EL sparse array antenna is fabricated and measured. Compared to an 8 × 16 element planar EL uniform array antenna, the number of antenna elements is reduced by 75%, while the MSLL is reduced by approximately 3 dB. The measured −10 dB impedance bandwidth ranges from 25.3 to 27.8 GHz. At the central frequency, the radiation pattern achieves a peak gain of 29.6 dBi, exhibiting low sidelobe levels below −15.0 dB.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"18 6","pages":"447-458"},"PeriodicalIF":1.7,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12475","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141424872","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Iterative synthesis method for high-directivity symmetrical stepped-impedance microstrip parallel-line coupler 高指向性对称阶梯阻抗微带平行线耦合器的迭代合成方法

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2024-04-23 DOI: 10.1049/mia2.12474

Yun Liu, Xiaojie Zhang, Zhuo Li

{"title":"Iterative synthesis method for high-directivity symmetrical stepped-impedance microstrip parallel-line coupler","authors":"Yun Liu, Xiaojie Zhang, Zhuo Li","doi":"10.1049/mia2.12474","DOIUrl":"https://doi.org/10.1049/mia2.12474","url":null,"abstract":"Traditional quarter-wavelength parallel-line couplers (QWPLC) in microstrip form suffer heavily in low directivity because of unbalanced even-mode and odd-mode phase velocities. Related schemes to improve directivity lead to complex structures and large dimensions. This study derives and validates an iterative synthesis method to design a high-directivity microstrip coupler adopting a symmetric stepped-impedance microstrip coupled line (SSIMCL). Given that the even-mode and odd-mode effective dielectric constants (EDCs) vary with the characteristic impedances, the authors take the EDCs of traditional QWPLC as the initial values for an SSIMCL, and the characteristic impedances and EDCs can be computed and converged in several iterations, resulting in good phase delay balance and high coupler directivity. A 20-dB microstrip coupler working at 1 GHz with high directivity is designed, fabricated, and measured. The obtained maximum directivity is 47 dB and approximately 1 GHz, while the relative bandwidth with a directivity higher than 20 dB and a return loss better than 20 dB is larger than 70%. The novel microstrip coupler also features a compact, simple structure shorter than λg/4.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"18 6","pages":"439-446"},"PeriodicalIF":1.7,"publicationDate":"2024-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12474","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141425127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Horn array antenna with high aperture efficiency and suppressed grating lobes 具有高孔径效率和抑制光栅裂片的喇叭阵天线

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2024-04-08 DOI: 10.1049/mia2.12473

Mohamad Hossein Anjomshoa, Seyed Ali Razavi Parizi

引用次数: 0

A wideband end-fire stepped slot antenna with gain enhancement and filtering capability 具有增益增强和滤波功能的宽带端射阶梯槽天线

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2024-04-05 DOI: 10.1049/mia2.12472

Shiyan Wang, Hao-Chen Li, Yin Li, Zai-Cheng Guo, Gang Zhang, Li Yang, Roberto Gómez-García

{"title":"A wideband end-fire stepped slot antenna with gain enhancement and filtering capability","authors":"Shiyan Wang, Hao-Chen Li, Yin Li, Zai-Cheng Guo, Gang Zhang, Li Yang, Roberto Gómez-García","doi":"10.1049/mia2.12472","DOIUrl":"10.1049/mia2.12472","url":null,"abstract":"A wideband end-fire stepped slot antenna with gain enhancement and filtering capability is proposed. On one hand, a parasitic dipole serving as a director is introduced in the stepped slot to improve the radiation gain of the slot antenna without increasing its physical size. It is found that a gain enhancement of about 2 dB can be achieved after adopting such approach. On the other hand, an absorptive branch possessing a nearly complementary frequency response with regard to the one of the slot antenna is in-parallel loaded at the microstrip feedline. It allows the partial dissipation of the out-of-band/non-radiated RF-signal power of the antenna to attain both an RF-quasi-absorptive behaviour and filtering capability. It is found that after loading the dissipative branch, the out-of-band radiation efficiency of the slot antenna is reduced to less than 20%. The measured results of a fabricated proof-of-concept antenna prototype show a reasonable agreement with the simulated ones and verify the RF performance merits of the proposed stepped slot antenna, such as wide RF operating band covering the 3.39−4.73-GHz range, end-fire radiation with a front-to-back ratio (FBR) above 10 dB, flat radiation gain, and co-integrated filtering functionality with RF-quasi-absorptive capability.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"18 6","pages":"422-429"},"PeriodicalIF":1.7,"publicationDate":"2024-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12472","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140575416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bandwidth enhancement of circularly polarised slot global navigation satellite systems antenna using an integrated filter-antenna approach 利用集成滤波器-天线方法增强圆极化槽式全球导航卫星系统天线的带宽

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2024-03-21 DOI: 10.1049/mia2.12154

Mostafa G. Aly, Yi Wang

引用次数: 0

Miniaturised high-isolation K-/Ka-band diplexer with 3D antarafacial channel integration using vertical quasi-coaxial matching network 利用垂直准同轴匹配网络集成 3D 反面通道的小型化高隔离 K-/Ka 波段双工器

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2024-03-17 DOI: 10.1049/mia2.12470

Yujin Zhou, Haoyu Wei, Jun Zhou, Chonghu Cheng, Yong Cheng

{"title":"Miniaturised high-isolation K-/Ka-band diplexer with 3D antarafacial channel integration using vertical quasi-coaxial matching network","authors":"Yujin Zhou, Haoyu Wei, Jun Zhou, Chonghu Cheng, Yong Cheng","doi":"10.1049/mia2.12470","DOIUrl":"10.1049/mia2.12470","url":null,"abstract":"A miniaturised high-isolation K-/Ka-band diplexer with exceeding adjacent channels using 3D antarafacial channel integration and vertical-quasi-coaxial-based matching network is proposed. For smaller size, lower loss and lower channel interference, the high-order low-pass filter for the K-band channel and the four-line-interdigital-coupled wideband bandpass filter for the Ka-band channel are respectively designed on two low-loss glass-based substrates, and these two substrates are integrated on the two antarafacial surface of the mounting board. The vertical-quasi-coaxial (VQC) embedded in the mounting board is not only used as three-dimensional (3D) interconnection of the two antarafacial channels but also designed as the constituent part of the matching/isolation network, and this can effectively decrease the impedance traction caused by the Ka-band filter for the K-band channel of the diplexer. In addition, four transmission zeros of the K-band filter are designed at the whole passband of the Ka-band channel to improve the isolation to the K-band channel for guaranteeing the performance of the diplexer at the Ka-band channel. Furthermore, working principle, design method and test solution of this proposed K-/Ka-band diplexer are well illustrated, and the high-isolation (>40 dB) in very adjacent wideband channels at K-band (18–23.5 GHz) and Ka-band (25.8–31.6 GHz) is achieved within a tiny size of 9 × 4 × 0.87 mm.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"18 4","pages":"291-296"},"PeriodicalIF":1.7,"publicationDate":"2024-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12470","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140166503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanical azimuthal beam-steering Fabry–Perot resonator antenna with large deflection angle 具有大偏转角的机械方位角波束转向法布里-珀罗谐振器天线

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2024-03-12 DOI: 10.1049/mia2.12471

Yufeng Liu, Lele Zhu, Wenmei Zhang, Wensong Wang

{"title":"Mechanical azimuthal beam-steering Fabry–Perot resonator antenna with large deflection angle","authors":"Yufeng Liu, Lele Zhu, Wenmei Zhang, Wensong Wang","doi":"10.1049/mia2.12471","DOIUrl":"10.1049/mia2.12471","url":null,"abstract":"Continuous beam steering approach with minimal power consumption is highly desirable in modern antenna designs. A simple mechanical method for achieving beam steering in the Fabry–Perot resonator antenna (FPRA) is presented. It involves rotating the upper phase gradient metasurface (PGM) mechanically to change the aperture phase distribution, so the beam is continuously steered in the azimuthal plane while maintaining a large elevation angle. The proposed PGM unit cell comprises a hexagonal ring and patch printed on both sides of the substrate, along with a honeycomb lattice. A prototype antenna operating at 5.65 GHz is fabricated and measured to validate the feasibility. Measurement results show that the FPRA achieves a gain of 14.9 dBi, and can continuously steer its beam in the azimuthal plane with an elevation angle of around θ = 50°. Measured radiation patterns in eight azimuthal directions (φ = 0°, 45°, 90°, 135°, 180°, 225°, 270°, and 315°) are consistent with the simulated results. Compared with other electrical tuning methods, our design has a compact size and requires lower power for the PGM rotation.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"18 6","pages":"413-421"},"PeriodicalIF":1.7,"publicationDate":"2024-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12471","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140114937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","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 of integrated wideband WR34-band diplexer-antenna array module for exploration of monolithic metal 3-D printing for space applications 设计集成宽带 WR34 波段双工器-天线阵列模块，探索用于空间应用的单片金属 3-D 打印技术

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2024-03-08 DOI: 10.1049/mia2.12468

Povilas Vaitukaitis, Jiayu Rao, Kenneth Nai, Jiasheng Hong

{"title":"Design of integrated wideband WR34-band diplexer-antenna array module for exploration of monolithic metal 3-D printing for space applications","authors":"Povilas Vaitukaitis, Jiayu Rao, Kenneth Nai, Jiasheng Hong","doi":"10.1049/mia2.12468","DOIUrl":"10.1049/mia2.12468","url":null,"abstract":"The design of a wideband diplexer integrated with a 16-slot Continuous Transverse Stub (CTS) antenna array is presented. The diplexer-antenna array module covers the whole WR34 band. The Tx and Rx bands cover 21.7–26 and 27.5–33 GHz ranges, respectively. The diplexer is designed to have a 100 dB attenuation in the stopband and 40 dB isolation between the channels. The antenna array has a high gain, between 26.9 and 31 dBi, at the lowest and highest frequencies. For the preliminary exploration of monolithic metal 3-D printing of complex geometry integrated RF front ends, two prototypes were manufactured in AlSi10 Mg. One-piece fabrication eliminates complicated assembly, enhances reliability, and reduces weight, which is more desirable for space applications. Due to several factors, namely, an unpolished inner surface and imperfect printing quality, the diplexer had a poor measured performance. The measured results of the antenna array had a relatively better agreement with simulations. Although, the realised gain was affected by the much lower effective conductivity of the unpolished 3-D printed material. Hence, the measured realised gain was between 27.8 and 30.9 dBi in the 29–33 GHz range.","PeriodicalId":13374,"journal":{"name":"Iet Microwaves Antennas & Propagation","volume":"18 4","pages":"280-290"},"PeriodicalIF":1.7,"publicationDate":"2024-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/mia2.12468","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140074231","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Scattering from a semi-elliptical cavity with arbitrary orientation placed in a perfect electric conductor plane 完美电导体平面内任意方位半椭圆形空腔的散射

IF 1.7 4区计算机科学

Iet Microwaves Antennas & Propagation Pub Date : 2024-03-06 DOI: 10.1049/mia2.12466

Mehdi Bozorgi

引用次数: 0