Integrating dielectric lenses with phased array antennas can be beneficial in numerous applications, yet the design procedure typically requires significant computational effort. In this work, we employ a streamlined in-house 2-D ray-tracing model to design dielectric lenses, with the goal of enhancing the gain of an array antenna at large scanning angles. The ray-tracing model also accounts for losses from material absorption and reflections. The interfaces between the dielectric layers of these lenses devised in this study are defined using splines to allow a large flexibility of their shape. First, dielectric lenses consisting of a core layer supplemented by two matching layers are investigated. The results show better performance compared to the lens constructed using the conic equation. In addition, multilayer dielectric lenses also provide more flexibility, as proved by the proposed configuration with five layers which also minimizes reflections in the optimized direction. Finally, a nonuniform multilayer lens, featuring two layers on the sides and a single layer near to broadside can improve gain at 60$^circ$ while maintaining efficiency at smaller angles.
{"title":"Improving the Scanning Coverage of Array Antennas With Multilayer Lenses Designed With a Ray Tracing","authors":"Pilar Castillo-Tapia;Núria Flores-Espinosa;Francisco Mesa;Maria Carolina Viganó;Oscar Quevedo-Teruel","doi":"10.1109/LAWP.2024.3507178","DOIUrl":"https://doi.org/10.1109/LAWP.2024.3507178","url":null,"abstract":"Integrating dielectric lenses with phased array antennas can be beneficial in numerous applications, yet the design procedure typically requires significant computational effort. In this work, we employ a streamlined in-house 2-D ray-tracing model to design dielectric lenses, with the goal of enhancing the gain of an array antenna at large scanning angles. The ray-tracing model also accounts for losses from material absorption and reflections. The interfaces between the dielectric layers of these lenses devised in this study are defined using <italic>splines</i> to allow a large flexibility of their shape. First, dielectric lenses consisting of a core layer supplemented by two matching layers are investigated. The results show better performance compared to the lens constructed using the conic equation. In addition, multilayer dielectric lenses also provide more flexibility, as proved by the proposed configuration with five layers which also minimizes reflections in the optimized direction. Finally, a nonuniform multilayer lens, featuring two layers on the sides and a single layer near to broadside can improve gain at 60<inline-formula><tex-math>$^circ$</tex-math></inline-formula> while maintaining efficiency at smaller angles.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 3","pages":"552-556"},"PeriodicalIF":3.7,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10769008","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143553526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}
Pub Date : 2024-11-27DOI: 10.1109/LAWP.2024.3507285
Qingxin Guo;Shen Meng;Runkun You
Two frequency-selective absorbers (FSAs) with one and two reflective bands are proposed in this letter. The first FSA realizes a single reflective band, which can be altered in a very wide range between two absorptive bands. Simulation results show that the center frequency of the reflective band with high selectivity and good flatness is adjusted from 5.7 GHz to 9.5 GHz by changing the dimension of the structure. The second FSA achieved two reflective bands which can be independently or simultaneously adjusted in wide frequency. Simulation results exhibit that in the band of 2.99 GHz to 13.15 GHz, three absorptive bands and two reflection bands appear alternately, and the first and the second reflective bands can be structurally adjusted from 5.38 GHz to 7.08 GHz and from 9.05 GHz to 11.17 GHz, respectively. The good agreement between the measurement and the simulation results verifies the design.
{"title":"Frequency-Selective Absorbers With High Design Flexibility of Reflective Band","authors":"Qingxin Guo;Shen Meng;Runkun You","doi":"10.1109/LAWP.2024.3507285","DOIUrl":"https://doi.org/10.1109/LAWP.2024.3507285","url":null,"abstract":"Two frequency-selective absorbers (FSAs) with one and two reflective bands are proposed in this letter. The first FSA realizes a single reflective band, which can be altered in a very wide range between two absorptive bands. Simulation results show that the center frequency of the reflective band with high selectivity and good flatness is adjusted from 5.7 GHz to 9.5 GHz by changing the dimension of the structure. The second FSA achieved two reflective bands which can be independently or simultaneously adjusted in wide frequency. Simulation results exhibit that in the band of 2.99 GHz to 13.15 GHz, three absorptive bands and two reflection bands appear alternately, and the first and the second reflective bands can be structurally adjusted from 5.38 GHz to 7.08 GHz and from 9.05 GHz to 11.17 GHz, respectively. The good agreement between the measurement and the simulation results verifies the design.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 3","pages":"562-566"},"PeriodicalIF":3.7,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143553383","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A fourth-order high-selectivity and wide stopband suppression filtering antenna with a symmetric coupling structure is presented. By incorporating resonant units with different structures, harmonics are effectively suppressed due to the resonators’ identical fundamental modes and distinct second-order harmonics. By introducing a cross-coupling path, two controllable radiation nulls are achieved, further enhancing the antenna's selectivity. Additionally, the symmetric coupling structure is employed to minimize cross-polarization. Finally, the theory of coupling matrix is utilized in the synthesis of the filtering antenna, and the relevant physical parameters are obtained. The results demonstrate that the proposed filtering antenna exhibits a bandwidth of 2.40 GHz to 2.66 GHz for |S11| < −10 dB, a peak gain of 6.1 dBi, and two radiation nulls at 1.98 GHz and 3.12 GHz, resulting in enhanced selectivity with suppression levels exceeding 37.5 dB and cross-polarization levels below −38.1 dB.
{"title":"Design and Synthesis of a High-Selectivity and Wide Stopband Suppression Filtering Antenna With Symmetric Coupling Structure","authors":"Xinwei Chen;Li Zhao;Runbo Ma;Jinrong Su;Wenmei Zhang","doi":"10.1109/LAWP.2024.3506626","DOIUrl":"https://doi.org/10.1109/LAWP.2024.3506626","url":null,"abstract":"A fourth-order high-selectivity and wide stopband suppression filtering antenna with a symmetric coupling structure is presented. By incorporating resonant units with different structures, harmonics are effectively suppressed due to the resonators’ identical fundamental modes and distinct second-order harmonics. By introducing a cross-coupling path, two controllable radiation nulls are achieved, further enhancing the antenna's selectivity. Additionally, the symmetric coupling structure is employed to minimize cross-polarization. Finally, the theory of coupling matrix is utilized in the synthesis of the filtering antenna, and the relevant physical parameters are obtained. The results demonstrate that the proposed filtering antenna exhibits a bandwidth of 2.40 GHz to 2.66 GHz for |<italic>S</i><sub>11</sub>| < −10 dB, a peak gain of 6.1 dBi, and two radiation nulls at 1.98 GHz and 3.12 GHz, resulting in enhanced selectivity with suppression levels exceeding 37.5 dB and cross-polarization levels below −38.1 dB.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 2","pages":"514-518"},"PeriodicalIF":3.7,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-27DOI: 10.1109/LAWP.2024.3507156
Xin Ma;Chongyao Ning;Deshuang Zhao;Bing-Zhong Wang
Flexibly generating the desired focused electric fields within a target area inside a metallic cavity is a challenging problem relevant in many applications. This letter proposes an analytical method for synthesizing the focused fields based on the eigenmode mapping (EMM) from 2-D to 3-D. Initially, the desired focused fields within the target area are expressed by the superposition of 2-D eigenmodes. These 2-D eigenmodes are then mapped onto 3-D eigenmodes, which can be excited at the same frequency. Subsequently, the antenna array excites the synthesized field, with the excitation coefficients determined by the excitation matrix and the 3-D eigenmode expansion vector of the desired electric field. Owing to its analytical properties, this method rapidly calculates the excitation coefficients, enabling real-time control of the focused field generation inside the cavity. Furthermore, the proposed method not only prevents the excitation of a limited number of 3-D eigenmodes and unwanted higher-order 3-D eigenmodes, but also takes into account the field distribution outside the focal spots, effectively reducing sidelobe levels. Full-wave simulations demonstrate that the proposed method successfully generated two focused fields with sidelobe levels 6 dB lower than the traditional time reversal (TR) method.
{"title":"Analytic Synthesis of Focused Fields of Low Sidelobe Levels Inside Metallic Cavity by 3-D Eigenmodes Mapping","authors":"Xin Ma;Chongyao Ning;Deshuang Zhao;Bing-Zhong Wang","doi":"10.1109/LAWP.2024.3507156","DOIUrl":"https://doi.org/10.1109/LAWP.2024.3507156","url":null,"abstract":"Flexibly generating the desired focused electric fields within a target area inside a metallic cavity is a challenging problem relevant in many applications. This letter proposes an analytical method for synthesizing the focused fields based on the eigenmode mapping (EMM) from 2-D to 3-D. Initially, the desired focused fields within the target area are expressed by the superposition of 2-D eigenmodes. These 2-D eigenmodes are then mapped onto 3-D eigenmodes, which can be excited at the same frequency. Subsequently, the antenna array excites the synthesized field, with the excitation coefficients determined by the excitation matrix and the 3-D eigenmode expansion vector of the desired electric field. Owing to its analytical properties, this method rapidly calculates the excitation coefficients, enabling real-time control of the focused field generation inside the cavity. Furthermore, the proposed method not only prevents the excitation of a limited number of 3-D eigenmodes and unwanted higher-order 3-D eigenmodes, but also takes into account the field distribution outside the focal spots, effectively reducing sidelobe levels. Full-wave simulations demonstrate that the proposed method successfully generated two focused fields with sidelobe levels 6 dB lower than the traditional time reversal (TR) method.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 3","pages":"547-551"},"PeriodicalIF":3.7,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143553052","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-27DOI: 10.1109/LAWP.2024.3506942
Huan Jiang;Bowen Deng;Yanlin Xu;Tao Tian;Peiguo Liu
A ultrawideband energy-selective structure (ESS) is proposed in this letter that can perform adaptive strong electromagnetic environment shielding. The adjustable dispersion curve of the spoof surface plasmon polariton (SSPP) unit with loaded nonlinear devices is utilized to achieve the transition between transmission state and shielding state based on the incident electromagnetic wave power intensity. The full wave simulation results conducted in waveguide WR-137 show that the structure can achieve insertion loss of less than 1 dB in the ultrawideband range of 6.7 GHz to 10.8 GHz (46.9% relative bandwidth), while achieving shielding efficiency of over 10 dB under signals with high power density. The prototype was simulated, fabricated, and measured through waveguide injection experiments. Considering the limited size of the waveguide structure, part of operating frequency bands have been verified. The SSPP-based ESS design method with ultrawideband characteristic has enormous application potential in electromagnetic shielding of electronic equipment.
{"title":"Ultrawideband Energy-Selective Structure Based on Spoof Surface Plasmon Polariton","authors":"Huan Jiang;Bowen Deng;Yanlin Xu;Tao Tian;Peiguo Liu","doi":"10.1109/LAWP.2024.3506942","DOIUrl":"https://doi.org/10.1109/LAWP.2024.3506942","url":null,"abstract":"A ultrawideband energy-selective structure (ESS) is proposed in this letter that can perform adaptive strong electromagnetic environment shielding. The adjustable dispersion curve of the spoof surface plasmon polariton (SSPP) unit with loaded nonlinear devices is utilized to achieve the transition between transmission state and shielding state based on the incident electromagnetic wave power intensity. The full wave simulation results conducted in waveguide WR-137 show that the structure can achieve insertion loss of less than 1 dB in the ultrawideband range of 6.7 GHz to 10.8 GHz (46.9% relative bandwidth), while achieving shielding efficiency of over 10 dB under signals with high power density. The prototype was simulated, fabricated, and measured through waveguide injection experiments. Considering the limited size of the waveguide structure, part of operating frequency bands have been verified. The SSPP-based ESS design method with ultrawideband characteristic has enormous application potential in electromagnetic shielding of electronic equipment.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 3","pages":"537-541"},"PeriodicalIF":3.7,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143553525","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-27DOI: 10.1109/LAWP.2024.3506590
Jinbo Ruan;Junsheng Yu;Tianyang Chen;Yuan Yao
In this letter, we concentrate on computational electromagnetic modeling for a wideband three-reflector compact antenna test range (CATR) system and evaluate the subsequent quiet zone (QZ) field electromagnetic characteristics. The fast design of the feedhorn is accomplished by integrating a coarse model, employing the mode matching method and Stratton–Chu formula, with a high-fidelity model based on full-wave simulations. The reflectors are synthesized by integrating ray tracing and B-spline surface construction. The designed feed horn, in conjunction with two shaped sub-reflectors, forms a dual reflector feed system to complete the illumination of the main reflector. The QZ field for the three-reflector CATR is calculated using physical optics and the physical theory of diffraction in GRASP10. Utilizing Lorentz reciprocity theorem and plane wave spectrum, numerical calculations of far-field pattern measurement predictions are provided for three-reflector CATR and antenna-under-test combinations. The useful bandwidth of the three-reflector CATR is 480 GHz to 600 GHz, with a QZ diameter of approximately 1 m to 2 m. The copolar amplitude and phase ripple meet the quality criteria, and cross-polarization isolation exceeds 50 dB.
{"title":"Design and Evaluation of Wideband Three-Reflector Compact Antenna Test Range System Based on Integrated Computational Electromagnetic Model","authors":"Jinbo Ruan;Junsheng Yu;Tianyang Chen;Yuan Yao","doi":"10.1109/LAWP.2024.3506590","DOIUrl":"https://doi.org/10.1109/LAWP.2024.3506590","url":null,"abstract":"In this letter, we concentrate on computational electromagnetic modeling for a wideband three-reflector compact antenna test range (CATR) system and evaluate the subsequent quiet zone (QZ) field electromagnetic characteristics. The fast design of the feedhorn is accomplished by integrating a coarse model, employing the mode matching method and Stratton–Chu formula, with a high-fidelity model based on full-wave simulations. The reflectors are synthesized by integrating ray tracing and B-spline surface construction. The designed feed horn, in conjunction with two shaped sub-reflectors, forms a dual reflector feed system to complete the illumination of the main reflector. The QZ field for the three-reflector CATR is calculated using physical optics and the physical theory of diffraction in GRASP10. Utilizing Lorentz reciprocity theorem and plane wave spectrum, numerical calculations of far-field pattern measurement predictions are provided for three-reflector CATR and antenna-under-test combinations. The useful bandwidth of the three-reflector CATR is 480 GHz to 600 GHz, with a QZ diameter of approximately 1 m to 2 m. The copolar amplitude and phase ripple meet the quality criteria, and cross-polarization isolation exceeds 50 dB.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 2","pages":"499-503"},"PeriodicalIF":3.7,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-27DOI: 10.1109/LAWP.2024.3507619
Hongzhi Chen;Qiutong Zhen;Jing Chen;Haoyuan Sun;Haoran Li;Leonid F. Chernogor;Zhongsen Sun;Yu Zheng;Tian Liu;Zhejun Jin
Transparent metasurface-loaded flexible antenna for the X band. The dumbbell-shaped metasurface is a type of polarization conversion unit arranged in a checkerboard pattern. This structure achieves 10 dB linear polarization radar cross-section (RCS) reduction under vertical incidence within the 9.2 GHz to 21.2 GHz range. Attach it to a slotted antenna array powered by a 1-to-4 Wilkinson power divider. The antenna has good radiation characteristics within the bandwidth of the X band. This antenna design boasts a low profile (0.14${{lambda }_0}$), flexibility, and interference resistance. In the 0°–90° central angle bending scenario, the structure maintains good RCS reduction and antenna radiation properties, while also effectively reducing electromagnetic waves at 0°–45° angle, making it highly suitable for wider applications such as detection radar, satellite communications, and medical equipment.
{"title":"X-Band and Low-RCS Flexible Wideband Antenna Array Based on Metasurface","authors":"Hongzhi Chen;Qiutong Zhen;Jing Chen;Haoyuan Sun;Haoran Li;Leonid F. Chernogor;Zhongsen Sun;Yu Zheng;Tian Liu;Zhejun Jin","doi":"10.1109/LAWP.2024.3507619","DOIUrl":"https://doi.org/10.1109/LAWP.2024.3507619","url":null,"abstract":"Transparent metasurface-loaded flexible antenna for the X band. The dumbbell-shaped metasurface is a type of polarization conversion unit arranged in a checkerboard pattern. This structure achieves 10 dB linear polarization radar cross-section (RCS) reduction under vertical incidence within the 9.2 GHz to 21.2 GHz range. Attach it to a slotted antenna array powered by a 1-to-4 Wilkinson power divider. The antenna has good radiation characteristics within the bandwidth of the X band. This antenna design boasts a low profile (0.14<inline-formula><tex-math>${{lambda }_0}$</tex-math></inline-formula>), flexibility, and interference resistance. In the 0°–90° central angle bending scenario, the structure maintains good RCS reduction and antenna radiation properties, while also effectively reducing electromagnetic waves at 0°–45° angle, making it highly suitable for wider applications such as detection radar, satellite communications, and medical equipment.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 3","pages":"567-571"},"PeriodicalIF":3.7,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143553295","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-26DOI: 10.1109/LAWP.2024.3507041
Long Pan;Rui Wang;Yong Luo
Millimete-wave (MMW) communication and sensing systems suffer from the challenge of realizing dual-polarized phased array antenna with large beam-scanning angles, due to the array unit can hardly having the radiation pattern with wide 3 dB beamwidth in both orthogonal planes (one is the beam-scanning plane). In this letter, we propose a dual-mode coupling radiation mechanism to integrate a monopole mode and a patch mode for obtaining 3 dB beamwidth larger than 120° in both two orthogonal planes. Hence, the array cascaded from the antenna unit can realize a wide beam scanning of −60°∼+60° within gain degradation of less than 3 dB in both ±45° polarizations. Based on this principle, a ±45° dual-polarized antenna unit is designed, and a prototype of a 1 × 8 ±45° dual-polarized phased array is fabricated. Experiments demonstrate that the MMW array operating in 25.5 GHz to 28 GHz (active |S11|< −10 dB) can scan from −60° to +60° with gain fluctuations less than 3 dB. The proposed MMW antenna can be applied to B5G/6G MMW communications and sensing.
{"title":"A Dual-Mode Coupling MMW Antenna With Dual Polarizations and Wide Scanning Angles","authors":"Long Pan;Rui Wang;Yong Luo","doi":"10.1109/LAWP.2024.3507041","DOIUrl":"https://doi.org/10.1109/LAWP.2024.3507041","url":null,"abstract":"Millimete-wave (MMW) communication and sensing systems suffer from the challenge of realizing dual-polarized phased array antenna with large beam-scanning angles, due to the array unit can hardly having the radiation pattern with wide 3 dB beamwidth in both orthogonal planes (one is the beam-scanning plane). In this letter, we propose a dual-mode coupling radiation mechanism to integrate a monopole mode and a patch mode for obtaining 3 dB beamwidth larger than 120° in both two orthogonal planes. Hence, the array cascaded from the antenna unit can realize a wide beam scanning of −60°∼+60° within gain degradation of less than 3 dB in both ±45° polarizations. Based on this principle, a ±45° dual-polarized antenna unit is designed, and a prototype of a 1 × 8 ±45° dual-polarized phased array is fabricated. Experiments demonstrate that the MMW array operating in 25.5 GHz to 28 GHz (active |<italic>S</i><sub>11</sub>|< −10 dB) can scan from −60° to +60° with gain fluctuations less than 3 dB. The proposed MMW antenna can be applied to B5G/6G MMW communications and sensing.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 3","pages":"542-546"},"PeriodicalIF":3.7,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143553395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-26DOI: 10.1109/LAWP.2024.3506594
Yu-Chen Hsu;Tzyh-Ghuang Ma
A W-band double-layered dual-linearly polarized transmitarray (DLPTA) is proposed for the first time by utilizing hybrid vialess unit cells (UCs) of three kinds for maximizing the phase coverage. At W band, the main challenge in designing transmitarrays relies on finding proper UCs without using multilayered structure or coupling vias. To conquer the restriction, three complementary UCs, the square ring-slot UC, the crossed-slot UC, and the meandered-strip UC, are developed each responsible for a specific range of transmitting phase with stable frequency response. By integrating the UCs, a DLPTA at 79 GHz is reported, which shows a peak gain of 29 dBi, an aperture efficiency of 37%, and a broad 3 dB bandwidth of 14%. The design methodology is discussed along with a comparison table to manifest the uniqueness of the design.
{"title":"W-Band Double-Layered Dual-Linearly Polarized Vialess Transmitarray Without Using Air Gap","authors":"Yu-Chen Hsu;Tzyh-Ghuang Ma","doi":"10.1109/LAWP.2024.3506594","DOIUrl":"https://doi.org/10.1109/LAWP.2024.3506594","url":null,"abstract":"A W-band double-layered dual-linearly polarized transmitarray (DLPTA) is proposed for the first time by utilizing hybrid vialess unit cells (UCs) of three kinds for maximizing the phase coverage. At W band, the main challenge in designing transmitarrays relies on finding proper UCs without using multilayered structure or coupling vias. To conquer the restriction, three complementary UCs, the square ring-slot UC, the crossed-slot UC, and the meandered-strip UC, are developed each responsible for a specific range of transmitting phase with stable frequency response. By integrating the UCs, a DLPTA at 79 GHz is reported, which shows a peak gain of 29 dBi, an aperture efficiency of 37%, and a broad 3 dB bandwidth of 14%. The design methodology is discussed along with a comparison table to manifest the uniqueness of the design.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 2","pages":"504-508"},"PeriodicalIF":3.7,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-25DOI: 10.1109/LAWP.2024.3506712
Rahman Askarzadeh;Ali Farahbakhsh;Davood Zarifi;Ashraf Uz Zaman
A single-layer, full metal, wideband, and high-efficiency slot array antenna operating in V band [(50 to 75) GHz] is proposed using a single corporate-feeding network based on gap waveguide (GW) technology. Compared with conventional multilayered slot array antenna, the proposed antenna utilizes only one waveguide feeding layer to excite the radiation slots; therefore, the assembly complexity of multilayer waveguide and manufacturing cost is greatly decreased. The proposed 16 × 16 slot array antenna consists of four 64-element smaller array antennas in which all radiation slots are fed by an E-plane groove gap waveguide (EGGW). Power division in each of the 8 × 8 element array antenna is realized by a wideband combined ridge and EGGW power divider. Two wideband E-plane groove gap waveguide T-junctions have been used to connect all four 64-element subarray antennas with proper phase and equal amplitude together to obtain higher gain. The final 16 × 16 slot array antenna has a peak gain of 32 dBi gain and about 36% impedance bandwidth at V band. Also, the full metal antenna array has an average efficiency of 80% over the entire bandwidth of 50 GHz to 72 GHz.
{"title":"Wideband High-Efficiency Slot Array Antenna Based on Gap Waveguide Single-Layer Feeding Network","authors":"Rahman Askarzadeh;Ali Farahbakhsh;Davood Zarifi;Ashraf Uz Zaman","doi":"10.1109/LAWP.2024.3506712","DOIUrl":"https://doi.org/10.1109/LAWP.2024.3506712","url":null,"abstract":"A single-layer, full metal, wideband, and high-efficiency slot array antenna operating in V band [(50 to 75) GHz] is proposed using a single corporate-feeding network based on gap waveguide (GW) technology. Compared with conventional multilayered slot array antenna, the proposed antenna utilizes only one waveguide feeding layer to excite the radiation slots; therefore, the assembly complexity of multilayer waveguide and manufacturing cost is greatly decreased. The proposed 16 × 16 slot array antenna consists of four 64-element smaller array antennas in which all radiation slots are fed by an E-plane groove gap waveguide (EGGW). Power division in each of the 8 × 8 element array antenna is realized by a wideband combined ridge and EGGW power divider. Two wideband E-plane groove gap waveguide T-junctions have been used to connect all four 64-element subarray antennas with proper phase and equal amplitude together to obtain higher gain. The final 16 × 16 slot array antenna has a peak gain of 32 dBi gain and about 36% impedance bandwidth at V band. Also, the full metal antenna array has an average efficiency of 80% over the entire bandwidth of 50 GHz to 72 GHz.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 2","pages":"519-523"},"PeriodicalIF":3.7,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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