Ultra‐wideband dual‐polarized transmitarray antenna with Vivaldi elements. Issue 12 (9th September 2021)

• Record Type: Journal Article
• Authors: Xiao, Lin; Qu, Shi‐Wei; Yang, Shiwen
• Is Part Of: International journal of RF and microwave computer-aided engineering. Volume 31:Issue 12(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-09-09
• Subjects: dual polarization -- transmitarray antenna -- true time delay -- ultra‐wideband -- Vivaldi array; Microwave devices -- Computer-aided design -- Periodicals; Computer-aided engineering -- Periodicals; 621.3813
• DOI: 10.1002/mmce.22892
• Languages: English
• ISSNs: 1096-4290

Abstract

Abstract: The implementation of an ultra‐wideband (UWB) dual‐polarized transmitarray antenna (TA) is presented in this paper. The proposed TA takes advantages of the UWB performance of Vivaldi array and the true‐time‐delay (TTD) characteristic of transmission line to overcome the inherent bandwidth limitations. First, a dual‐polarized TA element featuring low transmission losses, high polarization purity, and linear TTD phase responses over 5–16 GHz is designed, where an improved high‐impedance microstrip phase delay polyline is developed to enhance the transmitting efficiency. Then, in‐band resonances caused by wire grid ground in the construction of dual‐polarized TA aperture are carefully addressed. As a proof of concept, a prototype including 22 × 23 elements arranged in an egg‐crate configuration is manufactured and measured. The experimental results show that the TA achieves stable radiation performance within the operating band.