Wideband Planarized Dual-Linearly-Polarized Dipole Antenna and Its Integration for Dual-Circularly-Polarized Radiation

Abstract

A planarized dual-linearly-polarized (dual-LP) antenna and an integrated dual-circularly-polarized (dual-CP) antenna are proposed in this letter. For the dual-LP antenna, two groups of dipoles are fed by two balun-included feed networks to achieve ±45˚ polarizations. The feed networks and the radiators are printed on two sides of a substrate, forming a fully planar structure. Taking advantage of its planar configuration, the dual-LP antenna is further integrated with a wideband coupler to realize dual-CP radiation. The coupler is bent and squeezed into the space between the radiators and the reflector, leading to a compact structure. Both the dual-LP antenna and the dual-CP antenna have very stable radiation performances across a wide operating band > 66%.

Design of a Wideband Dual-Feed Circularly Polarized Antenna for Different Axial Ratio Requirements

“…Some minor discrepancies may be caused by the fabrication tolerance and measurement errors in the anechoic chamber. Table V compares the recently published dual-feed CP patch antennas [2], [4] and dipole antennas [6], [7] with the presented antenna. All of these antennas use branch-line coupler as the feed network.…”

High‐gain dual‐polarized antenna for ultrawideband applications

“…In comparison with designs, the proposed antenna has significant lower profile. Meanwhile, compared to the structures using electric or magneto‐electric dipoles, our design shows much better operating bandwidth with comparable profile and smaller lateral size. This is meaningful and is the main contribution of our antenna.…”

“…Crossed dipole antenna is another effective way for dualpolarized realization. This kind of antenna can be generally classified into two types: electric dipole (E-dipole) [12][13][14][15][16] or magneto-electric dipole (ME-dipole). [17][18][19] However, most of them suffer from limited operation bandwidth (BW) of normally less than 70%, except for the design with about 80%.…”

“…13 This deficiency makes them not applicable for UWB systems. Besides, using balun 12,13 or differential feed 15,18 also increases the antenna's complexity.…”

Ultrawideband high‐gain dual‐polarized antenna with anti‐interference capability

“…Alternatively, dual polarization can also be realized using crossed dipole structures. This type of antenna is generally formed by two electric dipoles (E‐dipole) or the combination of electric and magnetic dipoles (ME‐dipole) …”