A low‐cost, wideband, dual‐circularly polarized traveling wave antenna array. Issue 3 (2nd January 2021)

• Record Type: Journal Article
• Authors: Liu, Jin; Li, Jia‐Lin
• Is Part Of: International journal of RF and microwave computer-aided engineering. Volume 31:Issue 3(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-01-02
• Subjects: beam deflection -- dual‐circular polarization -- series‐feeding; Microwave devices -- Computer-aided design -- Periodicals; Computer-aided engineering -- Periodicals; 621.3813
• DOI: 10.1002/mmce.22532
• Languages: English
• ISSNs: 1096-4290

Abstract

Abstract: This article presents a low‐profile dual‐circularly polarized array based on the series feed and sequential rotation techniques. The basic radiation element is the microstrip based corner‐cut square patch that could achieve dual‐circularly polarized radiations. By rotating four basic elements in sequence to constitute a 2 × 2 subarray and series feeding with a phase difference of 90°, the axial ratio bandwidth can be greatly enhanced. Further, by symmetrically positioning four of such 2 × 2 subarrays coupled with out‐of‐phase feeding of the four subarrays, the beam deflection against frequency is corrected. To validate the proposed design, an 8 × 8 dual‐circularly polarized array operating at 6.0 GHz was developed and examined experimentally. Measurements and simulations confirm the design well.