A Compact SPDT Switch in 0.18um CMOS Process With High Linearity and Low Insertion Loss

A compact CMOS SPDT switch fabricated in 0.18 mum BiCMOS technology has been successfully demonstrated at X-Ku-band. The fully integrated chip exhibits a low insertion loss of 1.9 dB and an isolation of 22.5 dB at 17 GHz. By reverse biasing the source/drain (S/D) diode junctions, the switch achieves a PldB of 21 dBm and TOI greater than 30 dB in a very compact structure. The small footprint, along with the performance being comparable to GaAs switches, makes the switch a very attractive, low cost building block circuit for MMIC designs.

[1]  N. Suematsu,et al.  21.5-dBm power-handling 5-GHz transmit/receive CMOS switch realized by voltage division effect of stacked transistor configuration with depletion-layer-extended transistors (DETs) , 2004, IEEE Journal of Solid-State Circuits.

[2]  Qiang Li,et al.  CMOS T/R Switch Design: Towards Ultra-Wideband and Higher Frequency , 2007, IEEE Journal of Solid-State Circuits.

[3]  J.D. Cressler,et al.  Design and Layout Techniques for the Optimization of nMOS SPDT Series-Shunt Switches in a 130nm SiGe BiCMOS Technology , 2007, 2007 IEEE Radio Frequency Integrated Circuits (RFIC) Symposium.

[4]  R. Tayrani,et al.  Broad-band SiGe MMICs for phased-array radar applications , 2003 .

[5]  K.K. O,et al.  5.8-GHz CMOS T/R switches with high and low substrate resistances in a 0.18-μm CMOS process , 2003, IEEE Microwave and Wireless Components Letters.

[6]  David J. Allstot,et al.  Design considerations for a 10 GHz CMOS transmit-receive switch , 2005, 2005 IEEE International Symposium on Circuits and Systems.

[7]  G. Sakamoto,et al.  A SiGe MMIC 6-bit PIN diode phase shifter , 2002, IEEE Microwave and Wireless Components Letters.

[8]  S.S. Wong,et al.  Integrated CMOS transmit-receive switch using LC-tuned substrate bias for 2.4-GHz and 5.2-GHz applications , 2004, IEEE Journal of Solid-State Circuits.

[9]  Zuo-Min Tsai,et al.  Design and analysis for a miniature CMOS SPDT switch using body-floating technique to improve power performance , 2006, IEEE Transactions on Microwave Theory and Techniques.