Title :
A single-pole 6-throw (SP6T) antenna switch using metal-contact RF MEMS switches for multi-band applications
Author :
Lee, Jaewoo ; Je, Chang-Han ; Kang, Seongweon ; Choi, Chang-Auck
Author_Institution :
Basic Res. Lab., Electron. & Telecommun. Res. Inst., Daejeon, South Korea
Abstract :
A single-pole 6-throw (SP6T) antenna switch using metal-contact RF micro-electro-mechanical system (MEMS) series switches has been developed for multi-band applications. The fabricated metal-contact MEMS switch with a broad signal line gap of 140 μm shows a very high isolation loss of -51 dB at 2 GHz because its center-wedge (CW) can control a membrane stiction problem due to the anchor role. The pull-down voltage (VP) of the MEMS switch is 27.5 V and its leakage current is 26.1 μA at VP. The SP6T antenna switch, which has six SPST MEMS switches, is comprised of two transmitter (Tx) ports and four receiver (Rx) ports for quad-band application. The chip area is very compact to 1 mm2 (1.3 mm × 0.8 mm). This antenna switch has an isolation loss of -48 dB and an insertion loss of -0.27 dB at 2 GHz between the antenna (ANT) port and transmitter portl (T×1) at VA = 36V.
Keywords :
UHF antennas; microswitches; multifrequency antennas; receiving antennas; transmitting antennas; -0.27 dB; -48 dB; -51 dB; 0.8 mm; 1.3 mm; 2 GHz; 26.1 muA; 27.5 V; 36 V; RF MEMS switches; RF microelectro-mechanical system switch; SP6T antenna switch; insertion loss; isolation loss; leakage current; membrane stiction problem; metal-contact MEMS switch; pull-down voltage; receiver ports; single-pole 6-throw antenna switch; transmitter ports; Biomembranes; Leakage current; Micromechanical devices; Microswitches; Propagation losses; Radiofrequency microelectromechanical systems; Switches; Transmitters; Transmitting antennas; Voltage;
Conference_Titel :
Microwave Symposium Digest, 2005 IEEE MTT-S International
Print_ISBN :
0-7803-8845-3
DOI :
10.1109/MWSYM.2005.1516776