C-band 6-bit phase shifter for a phase array antenna

Abstract: A C-band 6-bit digital phase shifter is presented. The phase shifter is based on the synthetic design of a high-pass/low-pass network and the all-pass network. The series scatter restrain method is also discussed. The phase shifter is fabricated in 0.25 μm GaAs PHEMT technology and developed for C-band phased arrays, and the relative phase shift varies from 0 to 360 in step of 5.625°. The phase shifter, with a chip size of 4×1.95 mm², has achieved an insertion loss better than 6.4 dB, RMS phase error of less than 1.73°, and an input and output VSWR less than 1.6 at all conditions.

Key words: MMIC, high-pass/low-pass network, all-pass network, series scatter restrain

References:

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[1]	Campbell C F, Brown S A. A compact 5-bit phase-shifter MMIC for K-band satellite communication systems[J]. IEEE Trans Microw Theory Tech, 2000, 48(12): 2652. doi: 10.1109/22.899026
[2]	Yang J G, Yang K. Ka-band 5-bit MMIC phase shifter using InGaAs PIN switching diodes[J]. IEEE Microw Wireless Compon Lett, 2011, 21(3): 151. doi: 10.1109/LMWC.2010.2104314
[3]	Biglarbegian B, Nezhad-Ahmadi M R, Fakharzadeh M. Millimeter-wave reflective-type phase shifter in CMOS technology[J]. IEEE Microw Wireless Compon Lett, 2009, 19(9): 560. doi: 10.1109/LMWC.2009.2027065
[4]	Adler D, Popovich R. Broadband switched-bit phase shifter using all-pass networks[J]. IEEE MTT-S Int Microw Symp Dig, 1991: 265.
[5]	Wang L, Sun P, You Y. Highly linear Ku-band SiGe PIN diode phase shifter in standard SiGe BiCMOS process[J]. IEEE Microw Wireless Compon Lett, 2010, 20(1): 37. doi: 10.1109/LMWC.2009.2035962
[6]	Morton M A, Comeau J P, Cressler J D. 5 bit, silicon-based, X-band phase shifter using a hybrid pi/t high-pass/low-pass topology[J]. IET Microw Antennas Propag, 2008, 2(1): 19. doi: 10.1049/iet-map:20070077
[7]	Bahl I J, Conway D. L-and S-band compact octave bandwidth 4-bit MMIC phase shifters[J]. IEEE Trans Microw Theory Tech, 2008, 56(2): 293. doi: 10.1109/TMTT.2007.914636
[8]	Bahl I, Bhartia P. Microwave solid state circuit design. 2nd ed[J]. Wiley Interscience, 2003: 668.
[9]	Hangai M, Hieda M. S-and C-band ultra-compact phase shifters based on all-pass networks[J]. IEEE Trans Microw Theory Tech, 2010, 58(1): 41. doi: 10.1109/TMTT.2009.2036322
[10]	Xiao Q. A compact L-band broadband 6-bit MMIC phase shifter with low phase error[J]. Proceedings of the 6th European Microwave Integrated Circuits Conference, 2011: 410.