Title :
An X-band full-360° reflection type phase shifter with low insertion loss
Author :
Wei-Tsung Li ; Yen-Hung Kuo ; Yi-Ming Wu ; Jen-Hao Cheng ; Tian-Wei Huang ; Jeng-Han Tsai
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
fDate :
Oct. 29 2012-Nov. 1 2012
Abstract :
An X-band reflection-type phase shifter (RTPS) with full 360° continuous phase shift, low insertion loss, and low gain deviation using standard 0.15-μm HEMT process is demonstrated in this paper. Two circuit implementation techniques are employed: π-type reflection loads and folded Lange coupler. The π-type reflection loads and the folded Lange coupler are utilized in one stage reflection-type phase shifter to cover more than 180° phase tuning. Cascade of two stage RTPS is adopted to achieve 360° phase tuning. Measurements show signal losses of 6.4dB±1.4dB including pad loss, low gain deviation of 0.8 dB, and a 360° continuously tunable range across 11~13 GHz with 0-mW dc power consumption. To the best of our knowledge, the proposed phase shifter has the highest FOM of 46.2(°/dB), among all reported 360° X-band CMOS phase shifters.
Keywords :
CMOS integrated circuits; high electron mobility transistors; phase shifters; power consumption; π-type reflection loads; 360° X-band CMOS phase shifters; DC power consumption; FOM; Lange coupler; RTPS; X-band full-360° reflection type phase shifter; frequency 11 GHz to 13 GHz; low insertion loss; phase tuning; signal losses; standard HEMT process; CMOS integrated circuits; Couplers; Frequency measurement; Insertion loss; Loss measurement; Phase shifters; Reflection; Lange coupler; X-band; reflection load; reflection-type phase shifter;
Conference_Titel :
Microwave Conference (EuMC), 2012 42nd European
Conference_Location :
Amsterdam
Print_ISBN :
978-1-4673-2215-7
Electronic_ISBN :
978-2-87487-026-2