Title :
Reconfigurable multi-beam spiral antenna with RF-MEMS capacitive series switches fabricated on rigid substrates
Author :
Won Jung, Chang ; De Flaviis, Franco
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., California Univ., Irvine, CA, USA
Abstract :
A single-arm rectangular spiral antenna, which radiates multi-beam with radiofrequency-microelectromechanical system (RF-MEMS) capacitive series switches, is monolithic fabricated on rigid substrates (glass: εt = 7.4 and quartz: εt = 3.8). The spiral is configured by three-arms, which can be interconnected by two RF-MEMS series switches. The proposed antenna radiates left hand circular polarization (LHCP). The gain of multibeams is between 1 ∼ 3 dBi for glass substrate and 3 ∼ 5 dBi for quartz substrates. Multibeams of antennas satisfy a 3-dB axial ratio criterion at operating frequency band 11 GHz for glass and 6 GHz for quartz substrates.
Keywords :
antenna radiation patterns; electromagnetic wave polarisation; microswitches; microwave antennas; multibeam antennas; spiral antennas; 11 GHz; 6 GHz; LHCP; RF-MEMS capacitive series switches; left hand circular polarization; multibeam gain; multibeam radiation; quartz substrates; radiofrequency-microelectromechanical system; reconfigurable multibeam spiral antenna; rigid substrates; single-arm rectangular spiral antenna; Communication switching; Directive antennas; Fabrication; Glass; Gold; Polarization; Radiofrequency microelectromechanical systems; Spirals; Substrates; Switches;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2005 IEEE
Print_ISBN :
0-7803-8883-6
DOI :
10.1109/APS.2005.1551833
