400 GHz HBT differential amplifier using unbalanced feed networks

J. Hacker, M. Urteaga, R. Lin, A. Skalare, I. Mehdi, Jae-Sung Rieh, Moonil Kim

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

A terahertz differential eight-stage amplifier fabricated using state-of-the-art 125 nm double-heterojunction bipolar transistors (DHBT) is presented. The four-port unit-cell chain is designed for optimum forward differential gain with no even and odd-mode reverse gains. Unbalanced single-ended feed networks are added to preserve the amplifier gain without inducing oscillations. The proposed feed scheme is validated by a stable amplifier operation in 325-to-450 GHz range with the peak gain of 22 dB at 375 GHz.

Original languageEnglish
Article number6293920
Pages (from-to)536-538
Number of pages3
JournalIEEE Microwave and Wireless Components Letters
Volume22
Issue number10
DOIs
Publication statusPublished - 2012 Sep 7

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Keywords

  • Differential feed
  • InP HBT
  • Terahertz amplifier

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

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