Designing ultracompact antennas for implantable bioelectronics is challenging because antennas typically require a size comparable to the electromagnetic (EM) wavelength for high performance. This study presents an acoustically mediated piezoelectric (AMP) antenna that leverages the direct coupling of the mechanical resonance with the quasi-static electric field component for the first time. Our experiments demonstrate a 12 dB enhancement in antenna reception near the mechanical anti-resonance frequency, with the antenna size reduced to 1/300th of the EM wavelength. The power transfer efficiency (PTE) of the AMP antenna shows a strong correlation with the quality factor and impedance value at the anti-resonance frequency, which can further be effectively enhanced through antenna arraying. In a 25-element array, we achieve a PTE of 0.0539% at 50 mm, with a figure of merit (FoM) for wireless power transfer surpassing existing technologies around 400 MHz. This work underscores the potential of the AMP antenna for applications in implanted bioelectronics.
{"title":"Acoustically Mediated Piezoelectric Antenna for Ultracompact Biomedical Electronics","authors":"Jianle Liu;Chenye Zhang;Kailin Li;Yahui Ji;Shiyan Ma;Hao Gu;Peiran Zhang;Xianfeng Liang;Haifeng Gao;Jinghong Guo;Fan Yang;Tianling Ren;Tianxiang Nan","doi":"10.1109/LAWP.2024.3497012","DOIUrl":"https://doi.org/10.1109/LAWP.2024.3497012","url":null,"abstract":"Designing ultracompact antennas for implantable bioelectronics is challenging because antennas typically require a size comparable to the electromagnetic (EM) wavelength for high performance. This study presents an acoustically mediated piezoelectric (AMP) antenna that leverages the direct coupling of the mechanical resonance with the quasi-static electric field component for the first time. Our experiments demonstrate a 12 dB enhancement in antenna reception near the mechanical anti-resonance frequency, with the antenna size reduced to 1/300th of the EM wavelength. The power transfer efficiency (PTE) of the AMP antenna shows a strong correlation with the quality factor and impedance value at the anti-resonance frequency, which can further be effectively enhanced through antenna arraying. In a 25-element array, we achieve a PTE of 0.0539% at 50 mm, with a figure of merit (FoM) for wireless power transfer surpassing existing technologies around 400 MHz. This work underscores the potential of the AMP antenna for applications in implanted bioelectronics.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 2","pages":"374-378"},"PeriodicalIF":3.7,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361260","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 : 2024-11-13DOI: 10.1109/LAWP.2024.3497188
Junqing Xu;Yulong Xia;Qi Zhu
A wide-angle scanning circularly polarized (CP) concentric ring array (CRA) with large element spacing is proposed. With large element spacing, 75% of transmitter/receiver components (T/Rs) can be saved compared with a traditional compact uniform array. In addition, two-unit elements are adopted to improve the aperture efficiency of the CRA. Meanwhile, sequential rotation technology and specially designed radiating units are employed to achieve wide axial ratio (AR) bandwidth and wide gain bandwidth of the CRA. To verify the proposed method, a 64-element CP CRA working in a frequency band of 7.15 GHz to 8.65 GHz (19%) with an average element spacing of $1{rm{lambda }} times 1{rm{lambda }}$ is designed, fabricated, and measured. The CRA can scan from $ - text{50}^circ $ to $text{50}^circ $ in the elevation plane for all azimuth directions with AR less than 4.2 dB, scan loss less than 6.9 dB, and aperture efficiency in the Zenith direction higher than 44.7%.
{"title":"A Wide-Angle Scanning Circularly Polarized Concentric Ring Array With Large Element Spacing","authors":"Junqing Xu;Yulong Xia;Qi Zhu","doi":"10.1109/LAWP.2024.3497188","DOIUrl":"https://doi.org/10.1109/LAWP.2024.3497188","url":null,"abstract":"A wide-angle scanning circularly polarized (CP) concentric ring array (CRA) with large element spacing is proposed. With large element spacing, 75% of transmitter/receiver components (T/Rs) can be saved compared with a traditional compact uniform array. In addition, two-unit elements are adopted to improve the aperture efficiency of the CRA. Meanwhile, sequential rotation technology and specially designed radiating units are employed to achieve wide axial ratio (AR) bandwidth and wide gain bandwidth of the CRA. To verify the proposed method, a 64-element CP CRA working in a frequency band of 7.15 GHz to 8.65 GHz (19%) with an average element spacing of <inline-formula><tex-math>$1{rm{lambda }} times 1{rm{lambda }}$</tex-math></inline-formula> is designed, fabricated, and measured. The CRA can scan from <inline-formula><tex-math>$ - text{50}^circ $</tex-math></inline-formula> to <inline-formula><tex-math>$text{50}^circ $</tex-math></inline-formula> in the elevation plane for all azimuth directions with AR less than 4.2 dB, scan loss less than 6.9 dB, and aperture efficiency in the Zenith direction higher than 44.7%.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 2","pages":"384-388"},"PeriodicalIF":3.7,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361392","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 : 2024-11-13DOI: 10.1109/LAWP.2024.3497141
Yajin Wang;Wei Gan;Jianxun Su;Meijun Qu;Lan Lu;Hongcheng Yin;Zengrui Li
This letter proposes an approximate ray launching geometrical optics (ARL-GO) method for designing the profiles of 1-D and 2-D artificial metal rough surfaces (AMRSs) to realize ultrawideband radar cross section (RCS) reduction. The method transforms AMRS's height and gradient into the electromagnetic wave's amplitude and phase, achieving fast calculation of AMRS's RCS. Combined with the constrained multiobjective particle swarm optimization (PSO) algorithm, the AMRSs can format good diffuse scattering of incoming plane waves. Under normal incidence, the final optimized polarization-insensitive 1-D and 2-D AMRSs can realize 20 dB RCS reduction at frequencies of above 7.6 GHz and 6.7 GHz, respectively, with no upper limit frequency. While the incident angle reaches 40°, the designed AMRSs can still achieve 20 dB RCS reduction above 10 GHz, achieving good stealth performance. The theoretical analysis, simulation, and experimental results are in good agreement.
{"title":"Design of Artificial Metal Rough Surfaces for Ultrawideband RCS Reduction Based on Approximate Ray Launching Geometrical Optics","authors":"Yajin Wang;Wei Gan;Jianxun Su;Meijun Qu;Lan Lu;Hongcheng Yin;Zengrui Li","doi":"10.1109/LAWP.2024.3497141","DOIUrl":"https://doi.org/10.1109/LAWP.2024.3497141","url":null,"abstract":"This letter proposes an approximate ray launching geometrical optics (ARL-GO) method for designing the profiles of 1-D and 2-D artificial metal rough surfaces (AMRSs) to realize ultrawideband radar cross section (RCS) reduction. The method transforms AMRS's height and gradient into the electromagnetic wave's amplitude and phase, achieving fast calculation of AMRS's RCS. Combined with the constrained multiobjective particle swarm optimization (PSO) algorithm, the AMRSs can format good diffuse scattering of incoming plane waves. Under normal incidence, the final optimized polarization-insensitive 1-D and 2-D AMRSs can realize 20 dB RCS reduction at frequencies of above 7.6 GHz and 6.7 GHz, respectively, with no upper limit frequency. While the incident angle reaches 40°, the designed AMRSs can still achieve 20 dB RCS reduction above 10 GHz, achieving good stealth performance. The theoretical analysis, simulation, and experimental results are in good agreement.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 2","pages":"379-383"},"PeriodicalIF":3.7,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361261","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 : 2024-11-13DOI: 10.1109/LAWP.2024.3496874
Chunhui Li;Mengting Li;Zhengpeng Wang;Fengchun Zhang;Wei Fan
Over-the-air (OTA) testing of multiantenna radio receivers is increasingly significant due to the highly integrated radio frequency (RF) transceivers in such systems. It is essential for these systems to be evaluated under designed channel conditions. However, conventional field synthesis techniques are insufficient to meet this requirement in practice and typically necessitate rigorous anechoic environments and large number of probe antennas for synthesis. In this letter, a generalized wireless cable framework for arbitrary field emulation is proposed. The basic idea is to extend the traditional wireless cable method by calibrating the transfer matrix between the probe antennas and the device under test (DUT) antenna ports, and loading the target field vector, thereby emulating the equivalent field at the DUT antenna ports in an OTA manner. This framework can operate in nonanechoic environments without requiring an RF shielded enclosure. Finally, the proposed framework is experimentally validated in a nonanechoic radio environment by verifying several unique synthesized field and performing beamforming measurement. The measured results show excellent agreement with the target results, demonstrating the effectiveness, and robustness of the proposed framework.
由于多天线无线电接收机高度集成了射频（RF）收发器，因此对此类系统进行空中（OTA）测试的意义日益重大。在设计的信道条件下对这些系统进行评估至关重要。然而，传统的现场合成技术在实践中不足以满足这一要求，通常需要严格的消声环境和大量的探测天线来进行合成。在这封信中，我们提出了一种用于任意场仿真的通用无线电缆框架。其基本思想是通过校准探测天线和被测设备（DUT）天线端口之间的传输矩阵，加载目标场矢量，从而以 OTA 方式仿真 DUT 天线端口的等效场，从而扩展传统的无线电缆方法。该框架可在非消声环境中运行，无需射频屏蔽外壳。最后，通过验证几个独特的合成场并进行波束成形测量，在非消声无线电环境中对所提出的框架进行了实验验证。测量结果显示与目标结果非常吻合，证明了所提框架的有效性和鲁棒性。
{"title":"A Generalized Wireless Cable Over-the-Air Testing Framework for Arbitrary Field Emulation in Nonanechoic Radio Environment","authors":"Chunhui Li;Mengting Li;Zhengpeng Wang;Fengchun Zhang;Wei Fan","doi":"10.1109/LAWP.2024.3496874","DOIUrl":"https://doi.org/10.1109/LAWP.2024.3496874","url":null,"abstract":"Over-the-air (OTA) testing of multiantenna radio receivers is increasingly significant due to the highly integrated radio frequency (RF) transceivers in such systems. It is essential for these systems to be evaluated under designed channel conditions. However, conventional field synthesis techniques are insufficient to meet this requirement in practice and typically necessitate rigorous anechoic environments and large number of probe antennas for synthesis. In this letter, a generalized wireless cable framework for arbitrary field emulation is proposed. The basic idea is to extend the traditional wireless cable method by calibrating the transfer matrix between the probe antennas and the device under test (DUT) antenna ports, and loading the target field vector, thereby emulating the equivalent field at the DUT antenna ports in an OTA manner. This framework can operate in nonanechoic environments without requiring an RF shielded enclosure. Finally, the proposed framework is experimentally validated in a nonanechoic radio environment by verifying several unique synthesized field and performing beamforming measurement. The measured results show excellent agreement with the target results, demonstrating the effectiveness, and robustness of the proposed framework.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 2","pages":"364-368"},"PeriodicalIF":3.7,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361421","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 wideband omnidirectional metasurface antenna has been proposed. The characteristic mode analysis (CMA) was applied to explore the modal behaviors of the metasurface and guide the design. The proposed metasurface is designed based on a 5 × 5 square patched array, which is a hybrid metasurface incorporating square patches with 2 × 2 and 3 × 3 subarrays in a distributive arrangement, significantly improving the bandwidth and current distribution over a wide band. By properly adjusting the sizes of these elements, the bandwidth and gain are further improved. Based on the predicted excitation of the metasurface, a probe center-fed circular patch is introduced on the bottom layer, which not only excites the metasurface but also generates an additional mode to compensate the metasurface for attaining stable omnidirectional radiation. An antenna prototype was simulated, fabricated, and tested. The results show that the proposed antenna achieves a wide bandwidth of 70.1%, a peak gain ranging from 2 dBi to 6 dBi, and radiates a good omnidirectional pattern.
{"title":"A Wideband Omnidirectional Metasurface Antenna Using Characteristic Mode Analysis","authors":"Guirong Feng;Zixiang Wu;Yabo Lu;Jiaze Xu;Shanzhe Wang;Zhizhang Chen","doi":"10.1109/LAWP.2024.3496537","DOIUrl":"https://doi.org/10.1109/LAWP.2024.3496537","url":null,"abstract":"A wideband omnidirectional metasurface antenna has been proposed. The characteristic mode analysis (CMA) was applied to explore the modal behaviors of the metasurface and guide the design. The proposed metasurface is designed based on a 5 × 5 square patched array, which is a hybrid metasurface incorporating square patches with 2 × 2 and 3 × 3 subarrays in a distributive arrangement, significantly improving the bandwidth and current distribution over a wide band. By properly adjusting the sizes of these elements, the bandwidth and gain are further improved. Based on the predicted excitation of the metasurface, a probe center-fed circular patch is introduced on the bottom layer, which not only excites the metasurface but also generates an additional mode to compensate the metasurface for attaining stable omnidirectional radiation. An antenna prototype was simulated, fabricated, and tested. The results show that the proposed antenna achieves a wide bandwidth of 70.1%, a peak gain ranging from 2 dBi to 6 dBi, and radiates a good omnidirectional pattern.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 2","pages":"359-363"},"PeriodicalIF":3.7,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361420","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 : 2024-11-12DOI: 10.1109/LAWP.2024.3496476
Ningning Yan;Hongyan Yuan;Yu Luo;Kaixue Ma
A wideband millimeter-wave circularly polarized (CP) dielectric resonator antenna (DRA) is proposed in this letter based on substrate-integrated suspended line (SISL). To generate CP waves, a square DRA is cut off two corners. The introduction of the dielectric ring not only serves to fix the DR, but also improves the antenna matching and axial ratio bandwidth. In order to increase the axial ratio bandwidth and realized gain, a stacked strip is introduced on the C1 layer. The proposed antenna is fabricated and measured, and the measured results show the antenna has an impedance bandwidth of 27.94%, which is from 23.4 GHz to 31 GHz. The axial ratio bandwidth of 30.55% is from 23.3 GHz to 31.7 GHz, and the measured peak gain is 7.5 dBic.
{"title":"A Wideband Millimeter-Wave Circularly Polarized Dielectric Resonator Antenna With a Stacked Strip Using SISL Technology for 5G Applications","authors":"Ningning Yan;Hongyan Yuan;Yu Luo;Kaixue Ma","doi":"10.1109/LAWP.2024.3496476","DOIUrl":"https://doi.org/10.1109/LAWP.2024.3496476","url":null,"abstract":"A wideband millimeter-wave circularly polarized (CP) dielectric resonator antenna (DRA) is proposed in this letter based on substrate-integrated suspended line (SISL). To generate CP waves, a square DRA is cut off two corners. The introduction of the dielectric ring not only serves to fix the DR, but also improves the antenna matching and axial ratio bandwidth. In order to increase the axial ratio bandwidth and realized gain, a stacked strip is introduced on the C1 layer. The proposed antenna is fabricated and measured, and the measured results show the antenna has an impedance bandwidth of 27.94%, which is from 23.4 GHz to 31 GHz. The axial ratio bandwidth of 30.55% is from 23.3 GHz to 31.7 GHz, and the measured peak gain is 7.5 dBic.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 1","pages":"262-266"},"PeriodicalIF":3.7,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142937986","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 : 2024-11-11DOI: 10.1109/LAWP.2024.3496498
I. Suryarajitha;R. K. Panigrahi;M. V. Kartikeyan
A compact self-triplexing antenna (STA) operating simultaneously at 5.25 GHz, 28.85 GHz, and 31.9 GHz with better than 33 dB isolation among the frequency bands is presented in this letter. The design is based on a diagonally shielded half-mode substrate integrated waveguide cavity, which is designed by placing an open rectangular slot along the diagonal perfect magnetic wall and a row of metallized vias in a square cavity to shield the RF leakage. The cavity is loaded with two orthogonal modified rectangular slots on its top surface to facilitate triplexing operation. The STA features input reflection better than −10 dB over a fractional bandwidth of 3.79%, 4.16%, and 3.29% at 5.25 GHz, 28.85 GHz, and 31.9 GHz, respectively. The proposed STA has a peak gain of 5.1 dBi, 8.1 dBi, and 8.3 dBi with good cross-polarization levels at 5.25 GHz, 28.85 GHz, and 31.9 GHz, respectively. The STA achieves an efficiency better than 80% and 90% in microwave and mm-wave frequency regimes, respectively. The proposed STA is modeled and fabricated, and simulated results are experimentally validated.
{"title":"Diagonally Shielded HMSIW-Based Self-Triplexing Radiating Element for 5G Wireless Applications","authors":"I. Suryarajitha;R. K. Panigrahi;M. V. Kartikeyan","doi":"10.1109/LAWP.2024.3496498","DOIUrl":"https://doi.org/10.1109/LAWP.2024.3496498","url":null,"abstract":"A compact self-triplexing antenna (STA) operating simultaneously at 5.25 GHz, 28.85 GHz, and 31.9 GHz with better than 33 dB isolation among the frequency bands is presented in this letter. The design is based on a diagonally shielded half-mode substrate integrated waveguide cavity, which is designed by placing an open rectangular slot along the diagonal perfect magnetic wall and a row of metallized vias in a square cavity to shield the RF leakage. The cavity is loaded with two orthogonal modified rectangular slots on its top surface to facilitate triplexing operation. The STA features input reflection better than −10 dB over a fractional bandwidth of 3.79%, 4.16%, and 3.29% at 5.25 GHz, 28.85 GHz, and 31.9 GHz, respectively. The proposed STA has a peak gain of 5.1 dBi, 8.1 dBi, and 8.3 dBi with good cross-polarization levels at 5.25 GHz, 28.85 GHz, and 31.9 GHz, respectively. The STA achieves an efficiency better than 80% and 90% in microwave and mm-wave frequency regimes, respectively. The proposed STA is modeled and fabricated, and simulated results are experimentally validated.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 1","pages":"267-271"},"PeriodicalIF":3.7,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142937991","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 : 2024-11-11DOI: 10.1109/LAWP.2024.3496084
Yan Wang;Junhao Huang;Qifeng Yu;Changfei Zhou;Wenyu Zhang;Yingsong Li;Hang Wong
This letter introduces a multiband low-profile antenna by developing a simple metasurface (MS) and a hybrid feeding. The MS is reused as both a radiator for the y-polarized antenna and an artificial magnetic conductor reflector for the x-polarized antenna, resulting in a low profile of 0.1λ at 3.5 GHz through effective stacking. The y-polarized antenna takes the form of an MS-based grid-slotted patch with a wide band of 4.03 GHz to 5.63 GHz (1.6 GHz, 33.1%), while the x-polarized antenna is configured as a dipole with dual bands of 3.36 GHz to 3.70 GHz (0.34 GHz, 9.6%) and 5.14 GHz to 5.58 GHz (0.44 GHz, 8.2%). A defected ground structure is introduced to achieve impedance matching and generate a band notch for the dipole antenna. To address the misalignment of radiation patterns in the high-frequency band of the x-polarized antenna, an asymmetrical slot is employed for pattern correction by 11o.
这封信通过开发简单的元表面（MS）和混合馈电，介绍了一种多波段低剖面天线。元表面既用作 y 偏振天线的辐射器，又用作 x 偏振天线的人工磁导反射器，通过有效堆叠，在 3.5 GHz 频率下实现了 0.1λ 的低剖面。y 极化天线采用基于 MS 的栅格槽贴片形式，宽频带为 4.03 GHz 至 5.63 GHz（1.6 GHz，33.1%），而 x 极化天线则配置为偶极子形式，双频带为 3.36 GHz 至 3.70 GHz（0.34 GHz，9.6%）和 5.14 GHz 至 5.58 GHz（0.44 GHz，8.2%）。为了实现阻抗匹配并为偶极子天线产生频带凹口，引入了一个有缺陷的接地结构。为了解决 x 偏振天线高频段辐射模式不对准的问题，采用了一个不对称槽，将模式校正 11o。
{"title":"A Low-Profile Multiband Shared-Aperture Antenna Using Multiplexed Metasurface","authors":"Yan Wang;Junhao Huang;Qifeng Yu;Changfei Zhou;Wenyu Zhang;Yingsong Li;Hang Wong","doi":"10.1109/LAWP.2024.3496084","DOIUrl":"https://doi.org/10.1109/LAWP.2024.3496084","url":null,"abstract":"This letter introduces a multiband low-profile antenna by developing a simple metasurface (MS) and a hybrid feeding. The MS is reused as both a radiator for the <italic>y</i>-polarized antenna and an artificial magnetic conductor reflector for the <italic>x</i>-polarized antenna, resulting in a low profile of 0.1<italic>λ</i> at 3.5 GHz through effective stacking. The <italic>y</i>-polarized antenna takes the form of an MS-based grid-slotted patch with a wide band of 4.03 GHz to 5.63 GHz (1.6 GHz, 33.1%), while the <italic>x</i>-polarized antenna is configured as a dipole with dual bands of 3.36 GHz to 3.70 GHz (0.34 GHz, 9.6%) and 5.14 GHz to 5.58 GHz (0.44 GHz, 8.2%). A defected ground structure is introduced to achieve impedance matching and generate a band notch for the dipole antenna. To address the misalignment of radiation patterns in the high-frequency band of the <italic>x</i>-polarized antenna, an asymmetrical slot is employed for pattern correction by 11<sup>o</sup>.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 2","pages":"349-353"},"PeriodicalIF":3.7,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361418","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 : 2024-11-11DOI: 10.1109/LAWP.2024.3496432
Mario Phaneuf;Puyan Mojabi
We analytically demonstrate how the properties of local cascaded metasurface pairs can be mapped to those of single nonlocal metasurfaces such that their external field scattering remains identical regardless of the particular incident field. This mapping is obtained for 2-D problems by exploiting Love's equivalence principle and fundamental linear operations. We verify the mapping with simulated data and show that the mapping preserves the losslessness, passivity, and reciprocity characteristics of the original local cascaded metasurface pair.
{"title":"Mapping Local Cascaded Metasurface Pairs to Single Nonlocal Metasurfaces","authors":"Mario Phaneuf;Puyan Mojabi","doi":"10.1109/LAWP.2024.3496432","DOIUrl":"https://doi.org/10.1109/LAWP.2024.3496432","url":null,"abstract":"We analytically demonstrate how the properties of local cascaded metasurface pairs can be mapped to those of single nonlocal metasurfaces such that their external field scattering remains identical regardless of the particular incident field. This mapping is obtained for 2-D problems by exploiting Love's equivalence principle and fundamental linear operations. We verify the mapping with simulated data and show that the mapping preserves the losslessness, passivity, and reciprocity characteristics of the original local cascaded metasurface pair.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 2","pages":"354-358"},"PeriodicalIF":3.7,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361419","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 : 2024-11-11DOI: 10.1109/LAWP.2024.3495494
Ke Tao;Sheng Sun;Pei-Yao Chen;Ling-Jun Yang;Yuanjie Yang;Jun Hu
This letter proposes a new method for controlling the divergence angles of multimode orbital angular momentum (OAM) vortex beams. A geometric framework is established that allows for the same divergence angle across different OAM modes, which addresses a significant challenge in multimode systems. Proposed method combines 1-D linear array theory and the design of OAM beams with an equal divergence angle. By adjusting element phases, precise divergence control is achieved without altering the metasurface structure. The method's effectiveness is verified through theoretical synthesis, full-wave simulations, and experimental validation. This approach offers accurate control over a wide range of angles, demonstrating potential applications in communication systems.
{"title":"A Novel Method for Controlling the Divergence Angle of Multimode Vortex Beams","authors":"Ke Tao;Sheng Sun;Pei-Yao Chen;Ling-Jun Yang;Yuanjie Yang;Jun Hu","doi":"10.1109/LAWP.2024.3495494","DOIUrl":"https://doi.org/10.1109/LAWP.2024.3495494","url":null,"abstract":"This letter proposes a new method for controlling the divergence angles of multimode orbital angular momentum (OAM) vortex beams. A geometric framework is established that allows for the same divergence angle across different OAM modes, which addresses a significant challenge in multimode systems. Proposed method combines 1-D linear array theory and the design of OAM beams with an equal divergence angle. By adjusting element phases, precise divergence control is achieved without altering the metasurface structure. The method's effectiveness is verified through theoretical synthesis, full-wave simulations, and experimental validation. This approach offers accurate control over a wide range of angles, demonstrating potential applications in communication systems.","PeriodicalId":51059,"journal":{"name":"IEEE Antennas and Wireless Propagation Letters","volume":"24 2","pages":"344-348"},"PeriodicalIF":3.7,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361417","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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