Title :
A Circularly Polarized Ring-Antenna Fed by a Serially Coupled Square Slot-Ring
Author :
The-Nan Chang ; Jyun-Ming Lin ; Chen, Y.G.
Author_Institution :
Electr. Eng. Dept., Tatung Univ., Taipei, Taiwan
Abstract :
An aperture-coupled ring-antenna is presented in this communication. The antenna is fed by a microstrip line through a unique aperture configuration. The aperture contains a square slot ring with four short branch slots protruding toward the center of the ring. It is studied that axial-ratio and return-loss bandwidths of 8.7% centered at 2.53 GHz can be achieved. Within 2.42 GHz-2.64 GHz, the gains are all greater than 7 dBic.
Keywords :
UHF antennas; antenna feeds; microstrip lines; polarisation; slot antennas; aperture configuration; aperture-coupled ring-antenna; axial-ratio; circularly polarized ring-antenna; frequency 2.42 GHz to 2.64 GHz; microstrip line; return-loss bandwidths; serially coupled square slot-ring; Antenna measurements; Bandwidth; Couplings; Microstrip; Microstrip antennas; Slot antennas; Circular polarization; slot;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2011.2173138
