Pub Date : 2025-09-29DOI: 10.1109/LAWP.2025.3615165
Qingli Lin;Ming-Chun Tang;Mei Li;Richard W. Ziolkowski
An electrically small, low-profile, broadside-radiating, Huygens dipole antenna (HDA) with significantly enhanced bandwidth is presented. The near-field resonant parasitic (NFRP) grid array structure facilitates a broadband electric response; the three interdigital capacitors (IDCs)-loaded NFRP loops yield a broadband magnetic response with a lower profile and reduced size. By balancing the broadband resonant responses of both the electric and magnetic NFRP elements, an electrically small, broadside-radiating HDA with enhanced bandwidth performance characteristics is attained. The fabricated prototype exhibits a low profile, approximately 0.06λ0; an electrically small size, ka = 0.98; and a 14% impedance bandwidth that includes a 5.77% unidirectional bandwidth. Realized gain values, 2.6 dBi to 4.2 dBi, together with a radiation efficiency over 76% are achieved over its entire operational bandwidth.
{"title":"Electrically Small, Enhanced Bandwidth, Low-Profile, Broadside-Radiating Huygens Dipole Antenna","authors":"Qingli Lin;Ming-Chun Tang;Mei Li;Richard W. Ziolkowski","doi":"10.1109/LAWP.2025.3615165","DOIUrl":"https://doi.org/10.1109/LAWP.2025.3615165","url":null,"abstract":"An electrically small, low-profile, broadside-radiating, Huygens dipole antenna (HDA) with significantly enhanced bandwidth is presented. The near-field resonant parasitic (NFRP) grid array structure facilitates a broadband electric response; the three interdigital capacitors (IDCs)-loaded NFRP loops yield a broadband magnetic response with a lower profile and reduced size. By balancing the broadband resonant responses of both the electric and magnetic NFRP elements, an electrically small, broadside-radiating HDA with enhanced bandwidth performance characteristics is attained. The fabricated prototype exhibits a low profile, approximately 0.06λ<sub>0</sub>; an electrically small size, <italic>ka</i> = 0.98; and a 14% impedance bandwidth that includes a 5.77% unidirectional bandwidth. Realized gain values, 2.6 dBi to 4.2 dBi, together with a radiation efficiency over 76% are achieved over its entire operational bandwidth.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 12","pages":"4890-4894"},"PeriodicalIF":4.8,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145765639","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}
This letter presents a six-port sector planar leaky-wave antenna for 3-D beam scanning. The antenna comprises six identical surface wave launchers (SWLs) arranged in a fan-shaped array, a periodic metal strip structure, and an electromagnetic bandgap (EBG) structure. Each SWL consists of a transition for microstrip to H-plane dielectric horn, launching a quasi-planar surface wave. A genetic algorithm optimizes the metal strip geometry to mitigate the open stopband effect and achieve broadside radiation. A mushroom-type EBG structure further isolates the metal strips, minimizing unwanted surface wave coupling. Full-wave simulations and experimental validation confirm the antenna’s performance. Within the 9 GHz to 13 GHz band, the antenna achieves continuous beam scanning from −50° to +60°. By switching the feeding ports and adjusting the frequency, the beam can cover a significant portion of the upper hemisphere.
{"title":"Open-Stopband Effect Suppression in Planar Leaky-Wave Antennas With 3-D Beam Scanning","authors":"Zhihong Xu;Yunjie Hu;Bo-Hai Zhang;Lixuan Mao;Zhe Chen;Tao Yuan","doi":"10.1109/LAWP.2025.3615396","DOIUrl":"https://doi.org/10.1109/LAWP.2025.3615396","url":null,"abstract":"This letter presents a six-port sector planar leaky-wave antenna for 3-D beam scanning. The antenna comprises six identical surface wave launchers (SWLs) arranged in a fan-shaped array, a periodic metal strip structure, and an electromagnetic bandgap (EBG) structure. Each SWL consists of a transition for microstrip to <italic>H</i>-plane dielectric horn, launching a quasi-planar surface wave. A genetic algorithm optimizes the metal strip geometry to mitigate the open stopband effect and achieve broadside radiation. A mushroom-type EBG structure further isolates the metal strips, minimizing unwanted surface wave coupling. Full-wave simulations and experimental validation confirm the antenna’s performance. Within the 9 GHz to 13 GHz band, the antenna achieves continuous beam scanning from −50° to +60°. By switching the feeding ports and adjusting the frequency, the beam can cover a significant portion of the upper hemisphere.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 12","pages":"4900-4904"},"PeriodicalIF":4.8,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145765636","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}
In this letter, a dual-band omnidirectional coaxial colinear (CoCo) antenna with a large frequency ratio is proposed. It consists of two metal layers that alternate periodically via metal crossover lines to form a coplanar waveguide (CPW) CoCo antenna. The antenna operates in the folded dipole mode at low bands (LB) and in the CoCo mode at high bands (HB). A metal sheet functions as a series capacitor to achieve impedance matching for both bands, eliminating the need for additional matching elements that could increase design complexity. A prototype of the antenna is fabricated to validate the concept. The measured −10 dB impedance bandwidths are 438 MHz to 470 MHz and 4.6 GHz to 5.7 GHz. The peak gains at LB and HB are 1.8 dBi and 8.4 dBi, respectively. The gain variation in the H-plane remains within 3 dB across both bands, achieving dual-band omnidirectional radiation. The proposed antenna is well suited for applications in next-generation wireless communication systems.
{"title":"Dual-Band Omnidirectional CoCo Antenna With a Large Frequency Ratio","authors":"Haiyang Wang;Le Chang;Yue Li;Kunpeng Wei;Zhijun Zhang","doi":"10.1109/LAWP.2025.3614983","DOIUrl":"https://doi.org/10.1109/LAWP.2025.3614983","url":null,"abstract":"In this letter, a dual-band omnidirectional coaxial colinear (CoCo) antenna with a large frequency ratio is proposed. It consists of two metal layers that alternate periodically via metal crossover lines to form a coplanar waveguide (CPW) CoCo antenna. The antenna operates in the folded dipole mode at low bands (LB) and in the CoCo mode at high bands (HB). A metal sheet functions as a series capacitor to achieve impedance matching for both bands, eliminating the need for additional matching elements that could increase design complexity. A prototype of the antenna is fabricated to validate the concept. The measured −10 dB impedance bandwidths are 438 MHz to 470 MHz and 4.6 GHz to 5.7 GHz. The peak gains at LB and HB are 1.8 dBi and 8.4 dBi, respectively. The gain variation in the H-plane remains within 3 dB across both bands, achieving dual-band omnidirectional radiation. The proposed antenna is well suited for applications in next-generation wireless communication systems.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 12","pages":"4885-4889"},"PeriodicalIF":4.8,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145766176","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 : 2025-09-25DOI: 10.1109/LAWP.2025.3614180
Xin Li;Zhengpeng Wang;Xiaoming Chen
This letter proposes a novel source reconstruction method for antenna measurements in complex environments where scatterers are located near the antenna. Independent equivalent sources are established for the antenna and scatterer, and their current distributions are expanded in the orthogonal eigenmode basis of each impedance matrix. By retaining only the dominant eigenmode currents, the number of unknown coefficients is drastically reduced, leading to lower computational costs and enhanced numerical stability. Based on prior knowledge of the antenna structural symmetry, symmetry constraints are imposed to ensure accurate source recovery even when the antenna and scatterer lie in very close proximity. Simulation results demonstrate that, on a combined antenna–scatterer system spanning approximately five wavelengths, the method reconstructs the far-field pattern within 0.5 dB error while using under 6% of the original coefficients and cutting computation time to just 10% of the original. These gains are expected to increase for larger electrical sizes or more complex antenna systems.
{"title":"An Improved Source Reconstruction Method for Antenna Measurements in Complex Environments","authors":"Xin Li;Zhengpeng Wang;Xiaoming Chen","doi":"10.1109/LAWP.2025.3614180","DOIUrl":"https://doi.org/10.1109/LAWP.2025.3614180","url":null,"abstract":"This letter proposes a novel source reconstruction method for antenna measurements in complex environments where scatterers are located near the antenna. Independent equivalent sources are established for the antenna and scatterer, and their current distributions are expanded in the orthogonal eigenmode basis of each impedance matrix. By retaining only the dominant eigenmode currents, the number of unknown coefficients is drastically reduced, leading to lower computational costs and enhanced numerical stability. Based on prior knowledge of the antenna structural symmetry, symmetry constraints are imposed to ensure accurate source recovery even when the antenna and scatterer lie in very close proximity. Simulation results demonstrate that, on a combined antenna–scatterer system spanning approximately five wavelengths, the method reconstructs the far-field pattern within 0.5 dB error while using under 6% of the original coefficients and cutting computation time to just 10% of the original. These gains are expected to increase for larger electrical sizes or more complex antenna systems.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 12","pages":"4875-4879"},"PeriodicalIF":4.8,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145765630","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 compact broadband cooperative-mode filtering differentially inserted-fed circular-polarized dielectric resonator (DR) antenna (DRA) is proposed. The dominant mode HEM111 of the circular DR is differentially stimulated by a pair of embedded bifurcated arc metal strips, which generate two extra resonances. A cross slot etched on the reflecting ground and the cuttings on the DR are implemented to improve the axial ratio and introduce one more resonance to broaden the bandwidth for circular polarization in differential-end systems. An elliptic arc microstrip line is employed for the applications in single-end systems and provides more hybrid modes, resulting in a wider operation band. Two radiation nulls are also achieved at both edges of the band for high-frequency selectivity. The proposed design method realizes broadband and filtering performance for circular-polarized DRAs without increasing the size.
{"title":"Compact Cooperative-Mode Differential Circularly Polarized Dielectric Resonator Antenna","authors":"Hui Tang;Ruiping Liang;Jiawei Zhu;Huimin Li;Jian-Xin Chen","doi":"10.1109/LAWP.2025.3614667","DOIUrl":"https://doi.org/10.1109/LAWP.2025.3614667","url":null,"abstract":"A compact broadband cooperative-mode filtering differentially inserted-fed circular-polarized dielectric resonator (DR) antenna (DRA) is proposed. The dominant mode HEM<sub>111</sub> of the circular DR is differentially stimulated by a pair of embedded bifurcated arc metal strips, which generate two extra resonances. A cross slot etched on the reflecting ground and the cuttings on the DR are implemented to improve the axial ratio and introduce one more resonance to broaden the bandwidth for circular polarization in differential-end systems. An elliptic arc microstrip line is employed for the applications in single-end systems and provides more hybrid modes, resulting in a wider operation band. Two radiation nulls are also achieved at both edges of the band for high-frequency selectivity. The proposed design method realizes broadband and filtering performance for circular-polarized DRAs without increasing the size.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 12","pages":"4880-4884"},"PeriodicalIF":4.8,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145766170","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 : 2025-09-24DOI: 10.1109/LAWP.2025.3614054
Jia-Qi Huo;Wei Shao;Xiao-Hua Wang;Li-Ye Xiao
To successfully reconstruct the strong scatterers with high contrast in electromagnetic inverse scattering problems (ISPs), this letter proposes a region iteration method (RIM) based on the computational scheme of optimizing a discrete loss. By reducing the number of unknowns to decrease the nonlinearity of ISPs, the optimization in the RIM method does not easily fall into a local minimum. In the inversion process, RIM uses the Gauss–Newton optimization technique to minimize loss function and obtain the initial permittivity distribution of the scatterer. Then, with the idea of region iteration, the iterative results are divided into two regions according to a pre-set threshold. In the first region, the results larger than the threshold are taken as the known values for the next iterative inversion. Therefore, in the subsequent iterative process, only the results smaller than the threshold need to be reconstructed in the second region, which greatly reduces the nonlinearity of ISPs. Thus, the inversion quality can be improved iteratively. The inversion results, including numerical and experimental examples, show that the proposed method has good accuracy and efficiency and it is applicable to scatterers with high contrast.
{"title":"Region Iteration Method Based on Gauss–Newton Optimization for Highly Nonlinear Inverse Scattering Problems","authors":"Jia-Qi Huo;Wei Shao;Xiao-Hua Wang;Li-Ye Xiao","doi":"10.1109/LAWP.2025.3614054","DOIUrl":"https://doi.org/10.1109/LAWP.2025.3614054","url":null,"abstract":"To successfully reconstruct the strong scatterers with high contrast in electromagnetic inverse scattering problems (ISPs), this letter proposes a region iteration method (RIM) based on the computational scheme of optimizing a discrete loss. By reducing the number of unknowns to decrease the nonlinearity of ISPs, the optimization in the RIM method does not easily fall into a local minimum. In the inversion process, RIM uses the Gauss–Newton optimization technique to minimize loss function and obtain the initial permittivity distribution of the scatterer. Then, with the idea of region iteration, the iterative results are divided into two regions according to a pre-set threshold. In the first region, the results larger than the threshold are taken as the known values for the next iterative inversion. Therefore, in the subsequent iterative process, only the results smaller than the threshold need to be reconstructed in the second region, which greatly reduces the nonlinearity of ISPs. Thus, the inversion quality can be improved iteratively. The inversion results, including numerical and experimental examples, show that the proposed method has good accuracy and efficiency and it is applicable to scatterers with high contrast.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 12","pages":"4870-4874"},"PeriodicalIF":4.8,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145766181","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 : 2025-09-04DOI: 10.1109/LAWP.2025.3606008
Siqi Liu;Yong Liu;Hongda Lu
This letter presents an X-band 45° polarization shaped beam antenna with designable concave depth implemented using metal 3-D printing. The key innovations include: A dual-waveguide antenna aperture enabling concave depth control via superposition of difference and sum patterns is proposed, and a compact waveguide power divider is designed to provide the desired amplitude ratio and phase difference between the two waveguide apertures, effectively adjusting the mode ratio between the difference and sum beam patterns. The radiating waveguides are twisted by 45° without changing phase centers to realize 45° polarization. Three prototypes with different pattern concave depths are fabricated using metal 3-D printing and experimentally verified. Within the operating band from 8.4 GHz to 9.4 GHz, the pattern concave depths of −5.6 dB to −6.9 dB, −7.9 dB to −9.1 dB, and −12.2 dB to −13 dB are realized, respectively, with corresponding gains higher than 6.2 dBi, reflection coefficients below −12 dB and cross-polarization levels below −15 dB. This work provides a promising solution of 45°-polarized antenna with a designable pattern concave required by customized beam coverage and corresponding array implementations.
{"title":"3-D-Printed Single-Feed 45°-Polarized Waveguide-Based Antenna With Designable Concave Depth","authors":"Siqi Liu;Yong Liu;Hongda Lu","doi":"10.1109/LAWP.2025.3606008","DOIUrl":"https://doi.org/10.1109/LAWP.2025.3606008","url":null,"abstract":"This letter presents an X-band 45° polarization shaped beam antenna with designable concave depth implemented using metal 3-D printing. The key innovations include: A dual-waveguide antenna aperture enabling concave depth control via superposition of difference and sum patterns is proposed, and a compact waveguide power divider is designed to provide the desired amplitude ratio and phase difference between the two waveguide apertures, effectively adjusting the mode ratio between the difference and sum beam patterns. The radiating waveguides are twisted by 45° without changing phase centers to realize 45° polarization. Three prototypes with different pattern concave depths are fabricated using metal 3-D printing and experimentally verified. Within the operating band from 8.4 GHz to 9.4 GHz, the pattern concave depths of −5.6 dB to −6.9 dB, −7.9 dB to −9.1 dB, and −12.2 dB to −13 dB are realized, respectively, with corresponding gains higher than 6.2 dBi, reflection coefficients below −12 dB and cross-polarization levels below −15 dB. This work provides a promising solution of 45°-polarized antenna with a designable pattern concave required by customized beam coverage and corresponding array implementations.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 10","pages":"3824-3828"},"PeriodicalIF":4.8,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145236665","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 : 2025-09-04DOI: 10.1109/LAWP.2025.3605979
Xianghao Xiong;Youhuo Huang;Zhuo Wang;Jingli Guo;Lexiang Wang
This letter addresses the computational inefficiency of reflection coefficient calculation for loaded antennas under continuous-wave (CW) electromagnetic illumination. A rapid calculation method based on multiport network S-parameters is proposed. By establishing a network model incorporating radiation and load ports, the loaded antenna system is characterized as a scattering parameter matrix. Under the premise of maintaining invariant network topology, this method enables rapid recalculation of reflection coefficients through updating load parameters only, effectively avoiding repetitive full-wave simulation modeling in conventional approaches. A genetic algorithm optimization framework is subsequently developed based on this methodology, successfully designing an elliptical illuminator antenna with near-field horizontally polarized plane-wave simulation characteristics. Simulation results demonstrate that the optimized antenna achieves voltage standing-wave ratio (VSWR) below 2.7 across the 0.1 MHz to 30 MHz operational bandwidth, while the dominant polarization component of the electric field in the test area satisfies ≥0.1 V/m 23 (0.1 MHz to 1 MHz) and ≥1 V/m (1 MHz to 30 MHz).
{"title":"Optimization Design of Continuous Wave-Illuminated Antenna Based on Scattering Parameter Analysis","authors":"Xianghao Xiong;Youhuo Huang;Zhuo Wang;Jingli Guo;Lexiang Wang","doi":"10.1109/LAWP.2025.3605979","DOIUrl":"https://doi.org/10.1109/LAWP.2025.3605979","url":null,"abstract":"This letter addresses the computational inefficiency of reflection coefficient calculation for loaded antennas under continuous-wave (CW) electromagnetic illumination. A rapid calculation method based on multiport network <italic>S</i>-parameters is proposed. By establishing a network model incorporating radiation and load ports, the loaded antenna system is characterized as a scattering parameter matrix. Under the premise of maintaining invariant network topology, this method enables rapid recalculation of reflection coefficients through updating load parameters only, effectively avoiding repetitive full-wave simulation modeling in conventional approaches. A genetic algorithm optimization framework is subsequently developed based on this methodology, successfully designing an elliptical illuminator antenna with near-field horizontally polarized plane-wave simulation characteristics. Simulation results demonstrate that the optimized antenna achieves voltage standing-wave ratio (VSWR) below 2.7 across the 0.1 MHz to 30 MHz operational bandwidth, while the dominant polarization component of the electric field in the test area satisfies ≥0.1 V/m 23 (0.1 MHz to 1 MHz) and ≥1 V/m (1 MHz to 30 MHz).","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 11","pages":"4477-4481"},"PeriodicalIF":4.8,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145674675","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}
Cross-band interferences could deteriorate the performance of a dual-band shared-aperture phased array antenna (SAPAA), especially in small frequency ratio SAPAAs. This letter proposes novel self-decoupling techniques in an L-/S-band SAPAA to achieve out-of-band suppressions as low as −27.4 and 20.3 dBi for the radiations of L and S bands, respectively, and the cross-band port isolations are both more than 30 dB, with peak values exceeding 60 dB, without the need for additional filter circuits or decoupling structures. In addition, new technique of capacitive coupling folded arm is proposed to realize wide-beam and wideband characteristics. The shared-aperture structure is formed by a staggered arrangement of 4 × 4 L-/S-band endfire dipole antennas. As a result, the scanning range of the SAPAA can achieve ±60°/±70° in the E-/H-plane at 1.5 GHz to 1.8 GHz with voltage standing-wave ratios (VSWRs) under 3.3, and it can achieve ±60° in both the E-/H-plane at 2.5 GHz to 2.9 GHz with VSWRs under 3.3. The consistency of the measurement and simulation validates the designs.
{"title":"High-Isolation Wide-Angle Scanning L-/S-Band Shared-Aperture Phased Array Antenna Based on Self-Decoupling Technique","authors":"Ling-Long Gou;Yue Zhao;Bo-da Jing;Bin Shi;Jing Ma;Kun-Shan Mo;Lin Peng","doi":"10.1109/LAWP.2025.3605863","DOIUrl":"https://doi.org/10.1109/LAWP.2025.3605863","url":null,"abstract":"Cross-band interferences could deteriorate the performance of a dual-band shared-aperture phased array antenna (SAPAA), especially in small frequency ratio SAPAAs. This letter proposes novel self-decoupling techniques in an L-/S-band SAPAA to achieve out-of-band suppressions as low as −27.4 and 20.3 dBi for the radiations of L and S bands, respectively, and the cross-band port isolations are both more than 30 dB, with peak values exceeding 60 dB, without the need for additional filter circuits or decoupling structures. In addition, new technique of capacitive coupling folded arm is proposed to realize wide-beam and wideband characteristics. The shared-aperture structure is formed by a staggered arrangement of 4 × 4 L-/S-band endfire dipole antennas. As a result, the scanning range of the SAPAA can achieve ±60°/±70° in the E-/H-plane at 1.5 GHz to 1.8 GHz with voltage standing-wave ratios (VSWRs) under 3.3, and it can achieve ±60° in both the E-/H-plane at 2.5 GHz to 2.9 GHz with VSWRs under 3.3. The consistency of the measurement and simulation validates the designs.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 10","pages":"3814-3818"},"PeriodicalIF":4.8,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145236635","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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