Title :
Shorted Patch Antenna with PIN Diode Operating Band Switching
Author :
Bonefacic, Davor ; Bartolic, Juraj ; Germ, Mario
Author_Institution :
Dept. of Wireless Commun., Zagreb Univ.
Abstract :
An improved design of a shorted patch antenna with electronic switching of the operating bands is proposed. PIN diodes are used as switches for connecting four shorting posts to the ground plane. With reverse biased diodes the antenna operates at 2 GHz, while with forward biased diodes the operating frequency is 4 GHz. Two electronically switched impedance matching networks are designed, one for each band. The impedance matching networks are electronically switched with the same bias voltage used for switching the patch resonant frequency. The E- and H-plane co-polarization and cross-polarization radiation patterns are measured in both bands. The results show good radiation characteristics and lower cross-polarization levels in comparison to previous designs
Keywords :
UHF antennas; antenna radiation patterns; microstrip antennas; microwave antennas; microwave switches; p-i-n diodes; semiconductor switches; 2 GHz; 4 GHz; E-plane co-polarization; H-plane co-polarization; PIN diode switches; band switching; cross-polarization radiation patterns; electronic switching; forward biased diodes; impedance matching networks; microstrip antennas; patch resonant frequency; reverse biased diodes; shorted patch antenna; Communication switching; Diodes; Impedance matching; Microstrip antennas; Patch antennas; Polarization; Resonant frequency; Switches; Tuning; Varactors; Microstrip antennas; PIN diode switches; shorted patch antennas;
Conference_Titel :
Microwave Conference, 2006. 36th European
Conference_Location :
Manchester
Print_ISBN :
2-9600551-6-0
DOI :
10.1109/EUMC.2006.281056
