IEEE Antennas and Wireless Propagation Letters (AWPL)

?????????????????? ?????????????? ??????????!?? We are pleased to share with you the following featured work published on IEEE AWPL: Yifei Wei,?Xinhao Chen,?Baiyang Liu,?Yi Huang,?Chaijie Duan,?Qingfeng Zhang,?“2-D Single-Port Phase Coding Meta-Antenna Leveraging Frequency Diversity for Microwave Imaging, ”????????? ???????????????? ?????? ???????????????? ?????????????????????? ??????????????,?vol. 23, no. 11, 2024. ?? ?????? ????????????????????: ·?A single-port, two-dimensional planar meta-antenna design method is proposed to enable single-shot, high-speed microwave imaging. ·?By introducing continuous random phase coding into the meta-antenna element structure, high frequency diversity random field radiation is achieved. Simulation and experimental results further validate its enhanced sensing capacity. ·?Moreover, its low-profile aperture and efficient operation make it a promising candidate for advanced sensing scenarios. ???????? ?????? ???????? ?????????? ?????????? ?????? ?????????????????? ????????: https://lnkd.in/ghAnYGxv

?????????????????? ?????????????? ??????????!?? We are pleased to share with you the following featured work published on IEEE AWPL: Alicia Flórez Berdasco, Maria Elena de Cos Gómez, Jaime Laviada, Fernando Las-Heras,?“AMC-Backed Twin Arrow Antenna for Wearable Electronic Travel Aid System at 24 GHz, ”????????? ???????????????? ?????? ???????????????? ?????????????????????? ??????????????,?vol. 23, no. 11, 2024. ?? ?????? ????????????????????: ·?An ultra-compact wearable antenna for 24.05-24.25 GHz ETA applications is presented. ·?The AMC-antenna design minimizes backward radiation to the user while enhancing radiation performance and bandwidth without increasing size. ·?Prototypes of the AMC-antenna were fabricated and tested. In order to evaluate its performance for short-range detection, SAR imaging was conducted with the antenna placed on a user’s arm, leveraging natural movement to obtain high-resolution images of the surroundings. ·?Electromagnetic images confirmed the AMC-antenna's suitability for ETA systems, accurately detecting close metallic targets. Arm movement enhances image quality compared to a fixed antenna position, providing reliable target distance and profile estimation. ???????? ?????? ???????? ?????????? ?????????? ?????? ?????????????????? ????????: https://lnkd.in/grTeNGu6

?????????????????? ?????????????? ??????????!?? We are pleased to share with you the following featured work published on IEEE AWPL: David Santiago, Mu Fang, Ashraf Uz Zaman, Miguel Angel Gómez Laso, Txema Lopetegi, Ivan Arregui,?“W-band filtering antenna based on a slot array and stacked coupled resonators using gap waveguide technology, ”????????? ???????????????? ?????? ???????????????? ?????????????????????? ??????????????,?vol. 23, no. 8, 2024. ?? ?????? ????????????????????: ·?We proposed a new design approach for filtering antennas. The novel matching reflection coefficient-based method allows the integration of filters and antennas without compromising the frequency behavior of either of these components. Additionally, the method allows us to integrate both components avoiding the time-consuming optimization processes and offers significant flexibility in the type of antennas that can be used. ·?We introduced two examples of filtering antennas based on gap waveguide, both employing the same 4th- order Chebyshev bandpass filter at W-band, in order to validate the effectiveness of the design method regardless of the antenna configuration. The first design features a single aperture antenna, while the second prototype employs a slotted ridge gap waveguide array. ·?We validate the design method using gap waveguide technology at W-band. However, the design approach can be applied to other microwave technologies, such as microstrip or substrate integrated waveguide (SIW), allowing the design of filtering antennas across different frequency ranges. ???????? ?????? ???????? ?????????? ?????????? ?????? ?????????????????? ????????: https://lnkd.in/gdWc8unR

?????????????????? ?????????????? ??????????!?? We are pleased to share with you the following featured work published on IEEE AWPL: Rui Wu,?Guang-Hong Wen,?Fu-Chang Chen,?Jian-Feng Li,?Liang Hua Ye,?Wei-Ping Cao,?“A Low-Profile Broadband Filtering Antenna and Its Array for 5G Applications, ”????????? ???????????????? ?????? ???????????????? ?????????????????????? ??????????????,?vol. 23, no. 10, 2024. ?? ?????? ????????????????????: ·?This paper proposes a broadband dual-polarized filtering ME dipole antenna and its array with low-profile of only 0.11λc for 5G application. ·?Three controllable radiation nulls are introduced to achieve out-of-band suppression by loading cross-shaped patches, extending open-circuit branches, and designing special feeding networks, respectively. ???????? ?????? ???????? ?????????? ?????????? ?????? ?????????????????? ????????: https://lnkd.in/gybFJqFS

?????????????????? ?????????????? ??????????!?? We are pleased to share with you the following featured work published on IEEE AWPL: Houcun Wu, Jiaqi Han, Xiangjin Ma, Qiang Feng, Haixia Liu, Long Li,?“Conformally Reconfigurable Transmitarray Antenna with Adjustable Curvature Using Asymmetrical Structure Printed on Thin Substrates, ”????????? ???????????????? ?????? ???????????????? ?????????????????????? ??????????????,?vol. 23, no. 12, 2024. ?? ?????? ????????????????????: ·?A novel 1-bit reconfigurable transmissive unit cell that adopts an asymmetrical structure is proposed. ·?A method for calculating the phase compensation of cylindrical conformal array for any curvature is proposed. Based on this method, the compensation phase of the array is calculated accurately. ·?A 12 × 20 cylindrical CRTA prototype is manufactured and measured to realize beam scanning up to 50° at different curvatures ???????? ?????? ???????? ?????????? ?????????? ?????? ?????????????????? ????????: https://lnkd.in/gyJiNssP

?????????????????? ?????????????? ??????????!?? We are pleased to share with you the following featured work published on IEEE AWPL: Tian-Yu Yan, Xin-Hao Ding, Jun-Yao Yang, Jian-Xin chen,?“A Low-Cost Compact Dual-Polarized Patch Antenna Array for 5G Massive MIMO Base Station, ”????????? ???????????????? ?????? ???????????????? ?????????????????????? ??????????????,?vol. 23, no. 4, 2024. ?? ?????? ????????????????????: ·?A pioneering electrically connected stacked patch antenna suitable for 5G massive MIMO base station is proposed. ·?The two patches are using surface-mounted technology (SMT) directly connected by four metallic sheets formed by bending branches achieved from grooving the upper parasitic patch. The design eliminates the need for additional fixing devices, significantly reduces material and labor costs during mass production. ·?The addition of the beamwidth enhancement structure also achieves a reduction in the planar size of the antenna. The antenna achieves compact size of 0.343λL×0.343λL×0.071λL while featuring wide bandwidth of 20.3% cover over 5G n78 band, wide beamwidth (74±5°), and low cross-polarization (<-24 dB) meeting the demands of 5G massive MIMO base stations. ???????? ?????? ???????? ?????????? ?????????? ?????? ?????????????????? ????????: https://lnkd.in/grdHqQQx

?????????????????? ?????????????? ??????????!?? We are pleased to share with you the following featured work published on IEEE AWPL: Chenfeng Yang (CHENFENG YANG), Geng-Bo Wu, Dongze Zheng, Ka Fai Chan and Chi Hou Chan,?“A Low-Profile, Broadband, Beam-Steerable Folded Reflectarray Antenna for Millimeter-Wave Applications, ”????????? ???????????????? ?????? ???????????????? ?????????????????????? ??????????????,?vol. 23, no. 11, 2024. ?? ?????? ????????????????????: ·?A method is proposed to efficiently minimize the profile of beam scanning CP antenna. ·?The ray tracing principle is applied to a dual-metasurface structure for antenna profile reduction to one-quarter of the focal length. ·?The beam scanning function is realized by rotating two beam deflection metasurfaces inspired by the Risley prism concept. ·?The method can significantly reduce the beam scanning antenna profile while obtaining satisfactory antenna gain and operating bandwidth performance. ???????? ?????? ???????? ?????????? ?????????? ?????? ?????????????????? ????????: https://lnkd.in/gEa7VGmy

?????????????????? ?????????????? ??????????!?? We are pleased to share with you the following featured work published on IEEE AWPL: Linlin Song, Yuqing Wang, Lu Guo,?“A Low-Cost Ultrathin Metal-Only Transmitarray Antenna at X-Band, ”????????? ???????????????? ?????? ???????????????? ?????????????????????? ??????????????,?vol. 23, no. 5, 2024. ?? ?????? ????????????????????: ·?A low-cost ultrathin metal-only transmitarray antenna based on polarization rotation elements at X-Band is presented. The unit-cell comprises only dual metal layers etched with a pair of perpendicularly orientated fan-shaped slits and separated by an air gap of 2 mm, featuring an ultrathin configuration of 0.067λ at 10 GHz. It twists the polarization of transmission wave orthogonally with regard to the incidence. By tuning the length of fan-shaped slits along with mirroring the bottom layer of the unit-cell, a 360° phase span and a high transmission magnitude are realized. ·?An ultrathin metal-only transmitarray accommodating 361 elements is fabricated and measured. In terms of testing results, 7% 1 dB gain bandwidth and 42% peak aperture efficiency are realized. ???????? ?????? ???????? ?????????? ?????????? ?????? ?????????????????? ????????: https://lnkd.in/g3j2PYE9

?????????????????? ?????????????? ??????????!?? We are pleased to share with you the following featured work published on IEEE AWPL: Esra Celenk (Esra Celenk (Dogan), Ph.D.), Charles Lynch, Manos M. Tentzeris,?“An Ultrawideband All-Textile Metamaterial Absorber for Ku-, K-, and Ka-Band Applications, ”????????? ???????????????? ?????? ???????????????? ?????????????????????? ??????????????,?vol. 23, no. 6, 2024. ?? ?????? ????????????????????: ·?Ultrawideband absorption (13.1–31.13 GHz): The proposed all-textile metamaterial absorber, utilizing square-shaped split-ring resonators, achieves over 90% absorption across an 18.03 GHz bandwidth, covering Ku-, K-, and Ka-band frequencies. ·?Peak absorption efficiency: The absorber reaches 99% absorption between 16.4 GHz and 21 GHz. ·?Polarization and angle insensitivity: The absorber shows polarization insensitivity and maintains excellent performance under angular stability (0°–45° incidence), demonstrating minimal absorption variation. ·?Fabrication and practical implementation: A prototype was fabricated using E-textiles and wool felt. Simulation and measurement results align well, confirming the absorber's broadband and effective performance. ·?Potential applications: The absorber holds promise for a wide range of applications, including electromagnetic shielding, health monitoring, energy harvesting, and wearable electronics, thanks to its low-cost design using standard textile fabrication techniques. ???????? ?????? ???????? ?????????? ?????????? ?????? ?????????????????? ????????: https://lnkd.in/gRA2HS_v

?????????????????? ?????????????? ??????????!?? We are pleased to share with you the following featured work published on IEEE AWPL: Muhammad Mubasshir Hossain; Stavros Koulouridis; Satheesh Bojja Venkatakrishnan; John L. Volakis,?“Simple Wideband Circularly Polarized Tightly Coupled Dipole Array, ”????????? ???????????????? ?????? ???????????????? ?????????????????????? ??????????????,?vol. 23, no. 6, 2024. ?? ?????? ????????????????????: ·?For the first time, a Circularly Polarized Tightly Coupled Dipole Array (CP-TCDA) is realized. Proposed TCDA array employs overlapping dipoles placed conformally on a shallow ground plane to achieve wide bandwidth. ·?TCDA’s antenna element is comprised of a pair of orthogonal dipoles connected through two intrinsic quadrature phase shifters. ·?The overlapping dipoles are realized via capacitive pads that cross the dipole edges and are printed on the other side of the substrate. ·?Array unit cell feed employs a meandered Klopfenstein vertical balun to provide 50Ω to 188Ω balanced port impedance matching. ·?Key to the design is the achievement of 90° ± 15° phase difference between the crossed dipoles across the 2.7 GHz - 5.4 GHz bandwidth, ensuring wideband CP performance. ·?CP-TCDA Array retains VSWR < 3 from 2.3 GHz to 7.5 GHz, and maintains an axial ratio of < 3 dB from 2.7 GHz to 5.4 GHz. Testing was done using a stochastic model-based ultra-wideband 8×8 corporate power divider. ???????? ?????? ???????? ?????????? ?????????? ?????? ?????????????????? ????????: https://lnkd.in/gT3mDZhS