Broad-band HBT BPSK and IQ modulator MMICs and millimeter-wave vector signal characterization

Hong Yeh Chang, Tian Wei Huang, Huei Wang, Yu Chi Wang, Pane Chane Chao, Chung Hsu Chen

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


Reflection-type binary phase-shift keying and in-phase and quadrature modulator monolithic microwave integrated circuits (MMICs) are reported in this paper. These MMICs are fabricated by 1-μm HBT process and evaluated successfully under vector signal characterization. A cold-mode HBT device model with varying bias conditions is proposed, which is suitable for millimeter-wave circuit design and simulation. The analysis and design equations of imbalance effects for the reflection-type modulators are also presented. These MMICs demonstrate measured error vector magnitude of less than 12%, a carrier rejection of better than 15 dB, and an adjacent channel power ratio of better than -21 dBc from 50 to 110 GHz.

Original languageEnglish
Pages (from-to)908-919
Number of pages12
JournalIEEE Transactions on Microwave Theory and Techniques
Issue number3
StatePublished - Mar 2004


  • Binary phase-shift keying (BPSK)
  • Cold-mode HBT model
  • HBT
  • In-phase and quadrature (IQ)
  • Millimeter wave
  • Modulator
  • Monolithic microwave integrated circuit (MMIC)


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