Title :
300 GHz vector-sum phase shifter using InP DHBT amplifiers
Author :
Yu, H.G. ; Lee, Kyu J. ; Kim, Marn-Go
Author_Institution :
Sch. of Electr. Eng., Korea Univ., Seoul, South Korea
Abstract :
A vector-sum phase shifter that provides 90° phase control with a positive signal gain is successfully demonstrated at WR-3 band. The integrated circuit consists of input and output microstrip power dividers and two InP DHBT amplifiers with a 300 GHz gain of 14.8 dB. The measurements on a fabricated phase shifter show offset phases of -46°, -22°, 0°, 25°, 57° and signal gain of 7.7 to 10.1 dB at 300 GHz.
Keywords :
III-V semiconductors; heterojunction bipolar transistors; phase shifters; power dividers; DHBT amplifiers; InP; WR-3 band; frequency 300 GHz; gain 14.8 dB; gain 7.7 dB to 10.1 dB; integrated circuit; microstrip power dividers; vector-sum phase shifter;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2012.4109
