具有高强度带外抑制特性的宽带双脊喇叭天线  

Broadband Double-Ridged Horn Antenna with High-Intensity Out-of-Band Rejection

作　　者：薛宇 吕苗[1] 倪涛[1] 李宝洋[1] XUE Yu;LV Miao;NI Tao;LI Baoyang

机构地区：[1]中国电子科技集团公司第二十研究所,西安710068

出　　处：《现代导航》2023年第2期123-127,共5页Modern Navigation

摘　　要：提出了一种具有高强度带外抑制特性的宽带双脊喇叭天线。首先,采用两对喇叭外壁与双脊波导构成了开口波导结构,利用波导的高通特性实现高强度的带外抑制。然后,设计了一种非对称阶梯式双脊结构,基于脊结构降低喇叭主模截止频率的原理,获得较宽的工作带宽。仿真结果表明,提出的双脊喇叭天线在12~18 GHz内具有良好的阻抗匹配性能和稳定的方向图性能,通带内插入损耗小于0.5dB。同时,通带与阻带之间的过渡带很窄,传输系数在11GHz以下的频率范围内保持在-11 dB以下。所有结果表明,提出的双脊喇叭天线能够在保持良好的阻抗性能和稳定的方向图性能的同时,实现高强度的带外抑制效果。Broadband double-ridged horn antenna with high-intensity out-of-band rejection is proposed.First,two pairs of outer wall of the horn and double-ridged waveguide are used to form an open-ended waveguide.The high-intensity out-of-band rejection is achieved by utilizing the high frequency transmission of waveguide.Then,an asymmetric stepped double-ridged structure is designed to obtain the desired impedance bandwidth by reducing the cut-off frequency of the horn’s main mode.The simulated results reveal that good impedance matching and stable radiation patterns are obtained from 12 to 18 GHz with 0.5 dB insertion loss in the passband.Meanwhile,transition bands from the passband to the stopband are narrow.The transmission coefficients below 11 GHz could be suppressed under-11 dB.All the results demonstrate that the proposed double-ridged horn antenna can realize high-intensity out-of-band rejection while maintaining well impedance bandwidth and stable radiation patterns in the passband.

关 键 词：双脊喇叭天线 宽带 带外抑制 

分 类 号：TN821[电子电信—信息与通信工程]