Abstract:
Periodic leaky-wave endfire antennas are attractive for wireless communication, radar, and sensing applications because they can provide high gain with a compact longitudinal aperture. However, conventional designs often exhibit a limited gain-to-length ratio and strong dependence on specific dielectric environments. This talk presents a generalized design framework and method for compact periodic leaky-wave endfire antennas with high gain and high gain-to-length ratio across arbitrary dielectric constants. The proposed framework establishes three operating regimes according to the substrate permittivity. For high-permittivity substrates, a single-unit alternated configuration is employed to realize endfire radiation using the −1st spatial harmonic. For low-permittivity substrates, a multi-unit alternated configuration combined with subarray-level beamforming is introduced to suppress undesired higher-order spatial-harmonic radiation while maintaining high-gain endfire performance. For the air-based case, a zero-unit alternated configuration is adopted to support stable fundamental-mode endfire radiation. Representative designs under different dielectric conditions are presented to illustrate and validate the proposed methodology. The results demonstrate that periodic leaky-wave endfire antennas with high gain-to-length ratio can be systematically realized across a wide range of dielectric environments without fundamentally changing the overall array topology, providing a unified approach to compact, high-performance endfire antenna design. Biography:
Xihui Teng was born in Jilin, China. She received the B.Eng. degree in Communication Engineering from Jilin University, Changchun, China, in 2019, and the Ph.D. degree in Microelectronics from Tianjin University, Tianjin, China, in 2025. She is currently a Postdoctoral Fellow with King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia. She has authored more than 20 journal and conference papers, including multiple first-author papers in IEEE Transactions on Antennas and Propagation and IEEE Antennas and Wireless Propagation Letters. She received the Outstanding Doctoral Dissertation Award from Tianjin University, and the National Scholarship from the Ministry of Education of China. She also serves as a reviewer for IEEE Antennas and Wireless Propagation Letters, Microwave and Optical Technology Letters, and IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology. Her research interests include periodic leaky-wave endfire antennas, antenna-on-chip, phased arrays, flexible FSS-based absorbers, automotive radar antennas. Her work spans sub-6 GHz, millimeter-wave, and sub-terahertz frequencies up to 100 GHz.
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