學術活動預告：電智學術論壇之通信學科（11月17日）

【時間】2022年11月17日（周四）下午15:00開始

【地點】線下講座，9B406會議室

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

【主講人介紹】

鐘增培，通信工程系專任教師，2021年12月畢業于深圳大學電子與信息工程學院，獲工學博士學位，主要研究方向包括天線與微波電路、全球衛星導航定位系統。近年來，他一直緻力于高性能、小型化的導航圓極化天線研究，圍繞雙頻/寬頻、寬軸比波寬、增強前後比、小型化設計做了許多相關工作，發表學術論文21篇，其中以第一作者/通訊作者發表期刊和會議論文11篇。

【内容簡介】

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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