Compact Sequential Feeding Network With Quadruple Output Ports and Its Application for Wideband Circularly Polarized Antenna

IEEE Access

Mingxing Li¹  Lidan Yao¹  Li Deng²  Shufang Li²  Meijun Qu² 

[1] School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing, China;School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing, China;

关键词: Circularly-polarized antenna;    compact;    high-gain;    series-type feeding network;    wideband;    wide AR bandwidth;   

DOI  :  10.1109/ACCESS.2018.2822720

来源: DOAJ

【 摘 要 】

A compact single-layer series-type feeding network is proposed by utilizing two dual-band frequency-independent couplers in this paper. The overall size of the feeding network is further reduced by meandering the transmission lines. The proposed feeding network is quite suitable in the design of wideband circularly polarized antenna due to its wideband performance, identical amplitude and flat 90° successive shifts between two arbitrary adjacent ports. Based this, a wideband circularly polarized antenna for satellite application (L band and S band) is presented, fabricated, and measured employing the proposed feeding network. Four feeding strips are introduced to enhance the axial ratio (AR) bandwidth of the proposed antenna. The simulated AR bandwidth extends from 14.7% to 34.5% by loading the four feeding strips. The measured results indicate that the proposed antenna has numerous advantages, such as low-cost, low-profile (0.07λ₀), wideband, high gain, wide AR bandwidth, and excellent circularly polarized feature. Note that the measurements agree reasonably well with the simulations.

【 授权许可】

Unknown