超宽带双脊喇叭天线的仿真与设计
Simulation and Design of an Ultra-wide Band Double-ridged Horn
Antenna
摘要 根据喇叭天线的工作原理设计了一种超宽带双脊喇叭天线,这种天线体积小、宽频带和高增益。仿真结果表明,在2~20 GHz的带宽内驻波比小于2.2,且具有一致的方向图。结合仿真分别研究了喇叭天线脊宽、口径大小、馈电处脊的距离、后部腔体对天线驻波比和增益的影响。
关键词 超宽带;喇叭天线;电压驻波比;增益;方向图
Abstract An ultra-wideband double-ridged horn antenna with small size,wide bandwidth
and high gain was designed according to the principle of horn antenna.The simulation
results indicated that the small-size antenna has a voltage standing wave ratio(VSWR)
less than 2.2 in the frequency range from 2 GHz to 20 GHz and had consistent
patterns. According to the simulation results, the effect of the ridge width, the aperture
size, the ridge spacing at feeding point, and the length of rear chamfer on the VSWR
and gain of horn antenna were investigated.
Keywords ultra-wideband; horn antenna; VSWR; gain; pattern
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