Title :
Aperture-Coupled Microstrip Antennas With Switchable Polarization
Author :
Row, Jeen-Sheen ; Wu, Jia-Feng
Author_Institution :
Dept. of Electr. Eng., Nat. Changhua Univ. of Educ.
Abstract :
The design of an aperture-coupled microstrip antenna with switchable polarization is presented. The antenna is excited by a series microstrip-line-feed configuration through the coupling of a ring slot in the ground plane. For the ring-slot-coupled microstrip antenna, it is found that the minimum axial ratio in the 10 dB-input-impedance bandwidth can be varied between 0.4 and 23 dB when the length of the series stub is changed. Therefore, the antenna can radiate linear or circular polarization with good performances by selecting a proper length of the stub. To realize the voltage-controlled polarization switching, one PIN diode is integrated into the ring-slot-coupled microstrip antenna. Two typical layouts are indicated and their antenna prototypes are implemented. Details of the measured and simulated results are also presented
Keywords :
antenna feeds; antenna radiation patterns; aperture-coupled antennas; electromagnetic wave polarisation; microstrip antennas; microstrip lines; p-i-n diodes; slot antennas; PIN diode; aperture-coupled microstrip antenna; circular polarization; microstrip-line-feed configuration; ring-slot-coupled microstrip antenna; voltage-controlled polarization switching; Antenna measurements; Aperture antennas; Bandwidth; Circuit simulation; Communication switching; Diodes; Log periodic antennas; Microstrip antennas; Optical polarization; Slot antennas; Aperture coupling; microstrip antennas; polarization switching;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2006.880785
