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An L-shaped probe can generate circular polarization, combining with surrounding aperture, such as waveguides. And such structure has broadband characteristics in both axial ratio (AR) and input impedance, however cross-polarization (XPOL) is easily generated due to its asymmetrical structure resulting in a narrow azimuth range for circular polarization. In this paper, the waveguide structure is modified...
A low-profile helical antenna with capacitive feed was proposed and achieved circular polarization in vertical direction to the ground. Based on this study, a low-profile helical antenna which generates circular polarization in horizontal direction to the ground is studied. A proposed antenna can generate circular polarization in horizontal direction to the ground. The antenna has total thickness...
This paper investigates a wideband dual-polarized rectangular dielectric resonator antenna (DRA). The DRA is simultaneously excited in its fundamental TE111 mode and higher-order TE113 mode to widen the bandwidth. Their degenerate fields are also excited to obtain a polarization diversity antenna. An overlapped bandwidth of 29.6% (2.88-3.88 GHz), antenna gains ranging from 4.8 dBi to 9.9 dBi, and...
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