IEEE Antennas and Wireless Propagation Letters (AWPL)

?????????????????? ?????????????? ??????????!?? We are pleased to share with you the following featured work published on IEEE AWPL: Hui Li, Hong-yu Gao, Hao Wang, Yue-fang Zhu, Yuan-peng Li,?“Efficiency Improvement for Antennas in Folded Smartphones, ”????????? ???????????????? ?????? ???????????????? ?????????????????????? ??????????????,?vol. 23, no. 12, 2024. ?? ?????? ????????????????????: · A method for enhancing the radiation efficiency is proposed for foldable smartphone antennas in both free space and user scenarios. · A λ/2 parasitic branch is introduced on the secondary frame, which changes the reverse currents along the two frames to in-phase currents. The mechanism is analysed using equivalent circuit model. · To enhance the radiation efficiency in user scenarios, more currents are transferred to the secondary frame which is further away from the hand. The current transfer is realized by adding a shorting strip at the proper location of the secondary frame. · The method is effective for different kinds of antennas at different frequency bands.. ???????? ?????? ???????? ?????????? ?????????? ?????? ?????????????????? ????????: https://lnkd.in/gidsweNk

?????????????????? ?????????????? ??????????!?? We are pleased to share with you the following featured work published on IEEE AWPL: Xiaopeng Zhang, Qian Chen, Wei Geng, Qingxin Guo,?“A Wideband Circularly Polarized Metantenna with Low Radar Cross Section, ”????????? ???????????????? ?????? ???????????????? ?????????????????????? ??????????????,?vol. 23, no. 12, 2024. ?? ?????? ????????????????????: · A low-profile metantenna that achieves broadband circularly polarized radiation and significant radar cross-section (RCS) reduction performance is presented. · Based on the arrangement of the chessboard-like metasurface atoms and sequentially rotated feeding for the subarrays, the metantenna achieves excellent radiation and scattering performance simultaneously. · The measured results show that the antenna operating band covers from 7.28 GHz to 12.28 GHz, in which the reflection coefficient is lower than ?10 dB, the axial ratio is better than 3 dB, and the antenna gain ranges from 9.7 dBic to 12.7 dBic. In addition, it reduces the monostatic RCS by 10 dB from 9.95 GHz to 22.48 GHz. ???????? ?????? ???????? ?????????? ?????????? ?????? ?????????????????? ????????: https://lnkd.in/gk3QUqA2

?????????????????? ?????????????? ??????????!?? We are pleased to share with you the following featured work published on IEEE AWPL: Zhi-Xia Du, Manman Cui, Yao Zhang, Chunbing Guo,?“Miniaturized wideband self-oscillating active integrated antenna with power enhancement, ”????????? ???????????????? ?????? ???????????????? ?????????????????????? ??????????????,?vol. 23, no. 10, 2024. ?? ?????? ????????????????????: · A compact and wideband self-oscillating active integrated antenna (AIA) with power enhancement is proposed. In this self-oscillating AIA, a DC-charged wideband antenna with large equivalent capacitance is integrated with a pulse-triggered network, which works as part of the pulse oscillator circuit to generate high-power radiation pulses. · Different from the previous methods of improving the radiated power through increasing the AIA units, this work increases the radiated power by enhancing the energy storage capacity of the radiator. Measured results show that the effective isotropic radiated power (EIRP) of the proposed AIA is approximately 8 dB greater than the EIRP of the self-oscillating AIA employing a conventional dipole antenna, while the system size is only 0.1λ × 0.1λ at the frequency that corresponds to the maximum output power. ???????? ?????? ???????? ?????????? ?????????? ?????? ?????????????????? ????????: https://lnkd.in/g_HcV9Zv

?????????????????? ?????????????? ??????????!?? We are pleased to share with you the following featured work published on IEEE AWPL: Tian Hu, Tao Su, Yu-Tong Zhao, Jianzhong Chen, Bian Wu,?“Antenna–Filter–Antenna-Based Wideband Filtering Transmitarray Antenna, ”????????? ???????????????? ?????? ???????????????? ?????????????????????? ??????????????,?vol. 23, no. 12, 2024. ?? ?????? ????????????????????: · To achieve the transmitarray antenna (TA)’s wideband performance, two identical dipoles with wideband impedance matching are designed, as well as a third-order stripline filtering phase shifter (FPS) with stable and continuous phase shift is proposed. · The stable and continuous phase of the TA element within 360° can be achieved through two methods. One is to adjust the length of the stripline connecting the dipole and FPS, as well as the coupling between the resonators, and the other is to symmetrically flip the feeding position of the dipole. · The TA prototype can achieve a wide 3dB-gain bandwidth spanning from 4.36 to 5.74 GHz (28%), along with commendable filtering performance. ???????? ?????? ???????? ?????????? ?????????? ?????? ?????????????????? ????????: https://lnkd.in/gag8TsqC

?????????????????? ?????????????? ??????????!?? 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