Title :
Circular polarization switchable single layer microstrip array antenna
Author :
Ushijima, Yu ; Nishiyama, Eisuke ; Toyoda, Ichihiko ; Aikawa, Masayoshi
Author_Institution :
Grad. Sch. of Sci. & Eng., Saga Univ., Saga, Japan
Abstract :
In this paper, a circular polarization switchable single layer microstrip array antenna is proposed and the performances of the array antenna are confirmed experimentally. The array antenna consists of the orthogonal dual linear polarized microstrip array antenna which has several air-bridges, a 90-deg. hybrid circuit and a SPDT switch circuit loading four PIN diodes on a single layer substrate. It is possible to entirely integrate RF circuits with array antennas due to realization of the novel SPDT switch. By integrating the array antenna with both the SPDT switch circuit and the 90-deg. hybrid circuit, the circular polarizations (RHCP, LHCP) can be easily switched by the diode ON/OFF conditions. The design frequency is 10GHz. In the measurement, the 3 dB axial ratio bandwidth of 3.8% is obtained. Therefore, excellent the circular polarization switching performances of the proposed array antenna has been verified.
Keywords :
electromagnetic wave polarisation; linear antenna arrays; microstrip antenna arrays; p-i-n diodes; radiofrequency integrated circuits; switches; LHCP; PIN diode; RHCP; SPDT switch circuit loading; air-bridges; circular polarization switchable single layer microstrip array antenna; diode ON-OFF condition; frequency 10 GHz; gain 3 dB; integrate RF circuit; orthogonal dual linear polarized microstrip array antenna; single layer substrate; Arrays; Microstrip; Microstrip antenna arrays; Microstrip antennas; Polarization; Switches; Switching circuits;
Conference_Titel :
Antennas and Propagation Society International Symposium (APSURSI), 2012 IEEE
Conference_Location :
Chicago, IL
Print_ISBN :
978-1-4673-0461-0
DOI :
10.1109/APS.2012.6348662
