【時間】2023年5月25日（周四）15：30 開始

【地點(diǎn)】9B406會議室

【主題】面向全球?qū)Ш蕉ㄎ幌到y(tǒng)應(yīng)用的寬頻寬軸比波束縫隙螺旋天線研究

【主講人簡介】

鐘增培，東莞理工學(xué)院講師，2021年12月畢業(yè)于深圳大學(xué)電子與信息工程學(xué)院，獲工學(xué)博士學(xué)位。鐘博士的研究方向主要包括天線與微波電路、全球衛(wèi)星導(dǎo)航定位系統(tǒng)。近年來，他一直致力于高性能、小型化的導(dǎo)航圓極化天線研究，圍繞雙頻/寬頻、寬軸比波寬、增強(qiáng)前后比、小型化設(shè)計做了許多相關(guān)工作，發(fā)表學(xué)術(shù)論文21篇，其中以第一作者/通訊作者發(fā)表期刊和會議論文11篇。

【內(nèi)容簡介】

A travelling-wave-fed slot spiral antenna with wide axial-ratio (AR) bandwidth and beamwidth for GNSS applications is proposed. The evolution procedure of the proposed antenna can be classified into three steps. Firstly, 12 identical spiral slots are arranged concentrically in a compact area, and AR roundness in low elevation plane is improved by virtue of good rotational symmetry of slot radiators. Secondly, a two-turn travelling-wave feed line is sequentially coupled to the slots, and wideband response of desired magnitude ratio and phase difference of Eθ and E? is obtained by optimizing the number and growth rate of microstrip turns. Thirdly, by supporting the antenna with a modified metallic cavity, the CP radiation performance in low elevation plane is well improved, and thus a widened AR beamwidth is obtained. Finally, the proposed antenna with satisfactory performance is realized in a diameter of 0.56λ0 and height of 0.12λ0, where λ0 is the free-space wavelength at center frequency 1.4 GHz. Measured bandwidth of |S11| fully covers the entire GNSS bands, and the 3-dB AR bandwidth ranges from 1.14 to 1.67 GHz (37.7%). Moreover, the 3-dB AR beamwidth exceeds 140° at 1.4 GHz.

誠摯歡迎廣大師生參加。