On the feasibility of CMOS multiband phase shifters for multiple-antenna transmitters

Chao Lu, A.-V.H. Pham, D. Livezey
2006 IEEE Microwave and Wireless Components Letters  
We present the design of an integrated multiband phase shifter in RF CMOS technology for phased array transmitters. The phase shifter has an embedded classical distributed amplifier for loss compensation. The phase shifter achieves a more than 180 phase tuning range in a 2.4-GHz band and a measured more than 360 phase tuning range in both 3.5-GHz and 5.8-GHz bands. The return loss is less than 10 dB at all conditions. The feasibility for transmitter applications is verified through
more » ... hrough measurements. The output power at a 1-dB compression point (P 1 dB ) is as high as 0.4 dBm at 2.4 GHz. The relative phase deviation around P 1 dB is less than 3 . The design is implemented in 0.18-m RF CMOS technology, and the chip size is 1200 m 2300 m including pads.
doi:10.1109/lmwc.2006.873588 fatcat:zo57v6wux5a4phus3ihwvkoc4u