An L-Band 4-Bit RL/RC-Switched Active Phase Shifter Using Differential Switches

Kenji NAKAMURA, Yasushi ITOH

Summary :

An L-band 4-bit RL/RC-switched active phase shifter using differential switches is developed. It employs RL/RC circuits in the design of series feedback loops of the quadrature differential amplifier and achieves 90, 45, and 22.5of phase shift by switching on and off the RL/RC circuits alternatively. On the other hand, a 180phase shift is achieved with the use of a phase difference between the differential outputs. By cascading all four bits, an insertion gain of 16 to 23 dB, a phase error of less than 8.5, and an RMS phase error of 4.6have been achieved at 1 GHz.

• Publication: IEICE TRANSACTIONS on Electronics Vol.E92-C No.9 pp.1170-1175
• Publication Date: 2009/09/01
• Online ISSN: 1745-1353
• DOI: 10.1587/transele.E92.C.1170
• Type of Manuscript: Special Section PAPER (Special Section on Recent Progress in Microwave and Millimeter-Wave Technologies and Their Applications)

Authors

Kenji NAKAMURA
Yasushi ITOH

Keyword

phase shifter,  differential,  microwave,  switch,  SiGe HBT