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 /spl mu/m 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 (V/sub P/) of the MEMS switch is 27.5 V and its leakage current is 26.1 /spl mu/A at V/sub P/. 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 mm/sup 2/ (1.3 mm /spl times/ 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/spl times/1) at V/sub A/ = 36V.
[1]
Gabriel M. Rebeiz,et al.
RF MEMS switches and switch circuits
,
2001
.
[2]
W. Palei,et al.
A single-pole double-throw (SPDT) circuit using deep etching lateral metal-contact switches
,
2004,
2004 IEEE MTT-S International Microwave Symposium Digest (IEEE Cat. No.04CH37535).
[3]
M. Shifrin,et al.
Monolithic GaAs multi-throw switches with integrated low-power decoder/driver logic
,
1997,
1997 IEEE Radio Frequency Integrated Circuits (RFIC) Symposium. Digest of Technical Papers.
[4]
M. Takahashi,et al.
An antenna switch MMIC using E/D mode p-HEMT for GSM/DCS/PCS/WCDMA bands application
,
2003,
IEEE MTT-S International Microwave Symposium Digest, 2003.