CAJ | 학술논문

设计了一种小型化的槽螺旋天线。首先在普通的槽螺旋天线臂上开槽，再在天线最外圈的天线臂上加载6个等距分布的贴片电阻，基于多目标粒子群算法对开槽位置和贴片电阻阻值进行优化，使得天线的工作频率向低频偏移，同时保证具有良好的圆极化辐射特性。仿真结果表明：在0.44~18.00 GHz频段内回波损耗小于–10 dB，1.8~18.0 GHz频段内轴比小于3 dB。与普通的螺旋天线相比，在天线口径不变的情况下，极大地改善了天线的低频端的辐射特性。
설계료일충소형화적조라선천선。수선재보통적조라선천선비상개조，재재천선최외권적천선비상가재6개등거분포적첩편전조，기우다목표입자군산법대개조위치화첩편전조조치진행우화，사득천선적공작빈솔향저빈편이，동시보증구유량호적원겁화복사특성。방진결과표명：재0.44~18.00 GHz빈단내회파손모소우–10 dB，1.8~18.0 GHz빈단내축비소우3 dB。여보통적라선천선상비，재천선구경불변적정황하，겁대지개선료천선적저빈단적복사특성。
Aminiaturized slot spiral antenna was designed. Firstly, a slot was opened in ordinary slot spiral antenna arms, then 6 patch resistors were loaded on the end of antenna arms. The slot position and resistances were optimized by using MOPSO(multi-objectives with particle swarm optimization) algorithm to let the operating frequency of the antenna to offset toward the low frequency, and to ensure this antenna possessed good characteristics of circularly polarized radiation. Simulating results show that the return loss of the antenna is less than –10 dB from 0.44 GHz to 18.00 GHz, and the axial ratio is less than 3 dB from 1.8 GHz to 18.0 GHz. Compared with the ordinary spiral antenna in the same size, the radiation characteristics of the antenna are greatly improved at low frequency.