Linear tunable phase shifter using a left-handed transmission line

• DOI: 10.1109/lmwc.2005.847715
• Publication Date: 2005-05-11T15:22:21Z
• Authors: Hongjoon Kim; A.B. Kozyrev; A. Karbassi; D.W. van der Weide
• Keywords: 0202 electrical engineering, electronic engineering, information engineering; 02 engineering and technology

We demonstrate a compact, linear, and low loss variation hybrid phase shifter using a left-handed (LH) transmission line. For frequencies from 4.3 to 5.6 GHz, this phase shifter gives a nearly linear phase variation with voltage, with a maximum deviation of /spl plusmn/7.5/spl deg/. Within this frequency range, the maximum insertion loss is 3.6 dB, and the minimum insertion loss is 1.8 dB over a continuously adjustable phase range of more than 125/spl deg/, while minimum return loss is only 10.2 dB. Furthermore, this phase shifter requires only one control line, and it consumes almost no power.