学术活动预告：电智学术论坛之通信学科（11月17日）

【时间】2022年11月17日（周四）下午15:00开始

【地点】线下讲座，9B406会议室

【主题】Principle and Unified Design of Circularly Polarized Quadruple Inverted-F Antenna with Miniaturized Size and Enhanced Front-to-Back Ratio

【主讲人介绍】

钟增培，通信工程系专任教师，2021年12月毕业于深圳大学电子与信息工程学院，获工学博士学位，主要研究方向包括天线与微波电路、全球卫星导航定位系统。近年来，他一直致力于高性能、小型化的导航圆极化天线研究，围绕双频/宽频、宽轴比波宽、增强前后比、小型化设计做了许多相关工作，发表学术论文21篇，其中以第一作者/通讯作者发表期刊和会议论文11篇。

【内容简介】

The fundamental working principle of front-to-back ratio (FTBR) enhancement of the quadruple inverted-F antenna (QIFA) is clearly revealed for the first time and a unified design method is then proposed. The characteristic mode analysis (CMA) demonstrates that the QIFA actually operates in two orthogonal modes, and analytical derivation validates that each mode acts as a pair of parallel magneto-electric (ME) short dipoles for radiation. More specifically, the FTBR of the antenna is determined by the amplitude ratio and phase difference of the two pairs of equivalent ME dipoles. The equivalent model and analytical method can greatly facilitate the design. Firstly, by leading or lagging phase of either characteristic mode through excitation, the beam direction can be flexibly prescribed as forward and backward. Secondly, the bending direction and bending degree of radiators respectively determine the phase and amplitude of its equivalent magnetic dipole, by which the FTBR can be improved. A practical design is carried out with the proposed method, and the antenna achieves an electrically small size of 0.068λ0 × 0.068λ0 × 0.052λ0 and an FTBR of 12.3 dB.

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