Compact wideband circularly polarized horn antenna with tapered slot-coupled feeding for Ku-band applications
Compact wideband circularly polarized horn antenna with tapered slot-coupled feeding for Ku-band applications
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适用于 Ku 波段应用的具有锥形槽耦合馈电的紧凑型宽带圆极化喇叭天线
DOI：
10.1002/mmce.21898
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发表时间：
2019
影响因子：
1.7
通讯作者：
Sun Yingfei
中科院分区：
文献类型：
--
作者：
Xu Zheng;Duan Jiangbo;Hao Chengxiang;Xu Kuiwen;Chen Shichang;Zhao Peng;Sun Yingfei
设计了一种适用于Ku波段卫星通信的小型宽带缝隙耦合馈电圆极化喇叭天线。提出的设计是基于一个正方形口径喇叭天线与两个正交的脊，这是由不均匀的弯曲槽沿着对角喇叭的底部腔体。为了提高阻抗匹配，在馈电探针上连接了一个阶梯形脊作为匹配网络。此外，两个正交的脊通过馈电探针与阶梯脊耦合的锥形槽激发。在15 GHz时，器件的整体尺寸为9 mm × 9 mm × 14 mm（0.045 λ0× 0.045λ0× 0.07λ 0），实现了宽带CP性能。实验表明，该天线实现了：约2.4 GHz的宽10-dB回波损耗带宽，1 GHz的3-dB轴比带宽，和6.5 dBi的峰值增益。
A compact wideband circularly polarized (CP) horn antenna with slot‐coupled feeding structure at Ku band for satellite communication is devised. The proposed design is based on a square aperture horn antenna with two orthogonal ridges, which is fed by nonuniform curved slot along the diagonal of the horn on the bottom cavity. And in order to improve the impedance matching, a staircase typed ridge is connected the feeding probe as a matching network. Moreover, two orthogonal ridges are excited with a tapered slot coupled by the staircase ridges via feeding probe. Wideband CP performance is achieved with an overall physical dimension of 9 mm × 9 mm × 14 mm (0.045λ0× 0.045λ0× 0.07λ0at frequency of 15 GHz). It is experimentally demonstrated that the proposed antenna achieves: a wide 10‐dB return loss bandwidth of about 2.4 GHz, a 3‐dB axial ratio bandwidth of 1 GHz, and a peak gain of 6.5 dBi.