Title :
A tunable transmission line phase shifter (TTPS)
Author :
Kim, Taeik ; Allstot, David J.
Author_Institution :
Dept. of Electr. Eng., Washington Univ., Seattle, WA, USA
Abstract :
To achieve a phase shifting function having lower transmission loss and better phase shift performance for transceivers in adaptive antenna array applications, a phase shifter requiring a chip area of only 623 × 370 μm2 using a 250nm CMOS process is developed. The proposed tunable transmission line phase shifter consists of a coplanar waveguide used as a lumped inductor merged with an accumulation NMOS capacitor used for phase control. The merged structure reduces parasitic effects. The measured phase shift range for the proof-of-concept prototype is 22°.
Keywords :
CMOS integrated circuits; S-parameters; antenna arrays; coplanar waveguides; phase control; phase shifters; radiofrequency integrated circuits; transceivers; transmission lines; varactors; 250 nm; CMOS process; RF integrated circuits; accumulation NMOS capacitor; adaptive antenna array; coplanar waveguide; lumped inductor; on-wafer calibration; phase control; phase shift range; phase shifter; phase shifting function; scattering parameters; transceivers; transmission lines; transmission loss; tunable transmission line; varactors; Adaptive arrays; Antenna arrays; CMOS process; Performance loss; Phase shifters; Phased arrays; Propagation losses; Transceivers; Transmission lines; Transmitting antennas;
Conference_Titel :
Circuits and Systems, 2004. ISCAS '04. Proceedings of the 2004 International Symposium on
Print_ISBN :
0-7803-8251-X
DOI :
10.1109/ISCAS.2004.1328359
