An improved design and implementation of a broadband and wide axial ratio beamwidth circularly polarized parallel plate antenna

Abstract

This paper presents an improved design and implementation of broadband circularly polarized (CP) antenna that features a broad bandwidth and wide axial ratio (AR) beamwidth. First, the relationship between the three parallel plates (rectangular, semicircular, and semielliptical) and θ is analyzed. The semielliptical parallel plates (PP) used to obtain a wider 3dB AR-beamwidth (104°×110°×102°×118° at φ= 0°, 45°, 90°, 135°, respectively) compared with rectangular and semicircular PP. Secondly, orthogonal crosses with 43° inclined are used to generate orthogonal fields, and broadband characteristics can be obtained by adjusting the arm of orthogonal crosses. The semielliptical CP-PP antenna prototype was verified by ANSYS HFSS simulation. According to the measurement results, the -10 dB return loss is about 20% . A gain of 9.22 dBic at 27 GHz and a 3 dB ARbeamwidth of 106°×105° at φ=0° and φ=90° are obtained. The designed semielliptical CP-PP antenna can be more beneficial to 5G millimeter wave applications

A wideband dual-polarized crossed antenna with low profile and enhanced gain performance

“…Wideband antennas have attracted great attention due to their ability of broad coverage across frequency band such as modern high-speed wireless communication systems [1,2,3,4,5]. For example, common forms for broadband antenna include dipole antenna [6 7], spiral antenna [8], log periodic antenna [9], Vivaldi antenna [10], etc.…”