Broadband circularly polarized edge feed rectangular dielectric resonator antenna using effective glueless technique

摘要

In this article, a broadband circularly polarized rectangular dielectric resonator antenna (CP-RDRA) is explored and reported. The proposed antenna comprises of rectangular dielectric resonator (DR) made up of aluminum oxide placed on a Rogers RT-5880 substrate and fed by a 50-omega microstrip line with a partial ground plane. Microstrip line feed is placed at the right edge of rectangular DR to excite orthogonal fields, which achieves circular polarization (CP). The proposed antenna is fabricated and characterized. The measured -10 dB impedance bandwidth and 3 dB axial bandwidth are obtained as 5.44 GHz (5.79-11.23 GHz) and 2.93 GHz (6.08-9.01 GHz), respectively. The peak realized gain and antenna efficiency are obtained to be 4.62 dBi and 94%, respectively, in the desired frequency band. In addition, the proposed CP-RDRA is also realized using a new technique of glueless concept to achieve mechanical stability that also enhances the axial bandwidth without affecting the radiation characteristics. It is observed from the results that the proposed antenna can be a potential candidate for C-band and X-band in satellite communication systems.