400 GHz HBT Differential Amplifier Using Unbalanced Feed Networks
Authors:
- 31 August 2012
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Microwave and Wireless Components Letters
- Vol. 22 (10) , 536-538
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.Keywords
This publication has 4 references indexed in Scilit:
- Low Noise Amplification at 0.67 THz Using 30 nm InP HEMTsIEEE Microwave and Wireless Components Letters, 2011
- A 325 GHz InP HBT Differential-Mode AmplifierIEEE Microwave and Wireless Components Letters, 2011
- A New Broadband Marchand Balun Using Slot-Coupled Microstrip LinesIEEE Microwave and Wireless Components Letters, 2010
- Analysis of Multiconductor Coupled-Line Marchand Baluns for Miniature MMIC DesignIEEE Transactions on Microwave Theory and Techniques, 2007