Title :
Broadband circularly-polarised microstrip antenna with switchable polarisation sense
Author :
Wu, J.-F. ; Row, J.-S.
Author_Institution :
Dept. of Electr. Eng., Nat. Changhua Univ. of Educ., Chang-Hua
Abstract :
A circularly-polarised microstrip antenna capable of switching polarisation sense is presented. The proposed microstrip antenna has a circular radiating patch and is excited by an open-loop microstrip line through the coupling of a ring slot in the ground plane. Two ends of the open-loop microstrip line can be taken for the input ports to excite right-hand and left-hand circular polarisations, respectively. A prototype using PIN diodes to electrically switch the input ports is implemented, and the measured results show the 3 dB axial ratio bandwidth of more than 10% can be obtained at the two polarisation senses
Keywords :
antenna radiation patterns; broadband antennas; electromagnetic wave polarisation; microstrip antennas; microstrip lines; p-i-n diodes; PIN diodes; broadband antenna; circular radiating patch; circularly-polarised antenna; microstrip antenna; open-loop microstrip line; switchable polarisation sense;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20063065
