Title :
A broadband HBT MMIC IQ modulator and millimeter-wave vector signal characterization
Author :
Hong-Yeh Chang ; Tian-Wei Huang ; Huei Wang ; Yu-Chi Wang ; Pane-Chane Chao ; Chung-Hsu Chen
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
A broadband 50-110 GHz HBT MMIC IQ modulator and a vector signal measurement system for millimeter-wave applications are reported in this paper. For the digital modulation measurement, a QPSK modulation format was used with a 2-Mbps data rate for the IQ modulation. Using the 50-110 GHz vector signal measurement system, this MMIC chip shows an error vector magnitude (EVM) of within 12 % rms and a carrier rejection of more than 21 dB. The 110-GHz operation frequency of this MMIC is the highest among all the reported HBT vector modulators. Also, this is the first time the EVM test was performed for an IQ modulator at V-band and W-band. This MMIC is suitable for software defined radio (SDR), linearization techniques of power amplifier and related transmitter applications both in V-band and W-band.
Keywords :
bipolar MMIC; heterojunction bipolar transistors; millimetre wave measurement; modulators; quadrature phase shift keying; 2 Mbit/s; 50 to 110 GHz; QPSK modulation; V-band; W-band; broadband HBT MMIC IQ modulator; carrier rejection; digital modulation; error vector magnitude; millimeter-wave vector signal measurement system; Digital modulation; Frequency; Heterojunction bipolar transistors; MMICs; Millimeter wave measurements; Millimeter wave technology; Performance evaluation; Quadrature phase shift keying; Semiconductor device measurement; Testing;
Conference_Titel :
Microwave Symposium Digest, 2003 IEEE MTT-S International
Conference_Location :
Philadelphia, PA, USA
Print_ISBN :
0-7803-7695-1
DOI :
10.1109/MWSYM.2003.1210892
