Broadband Gm-boosted differential HBT doublers with transformer balun
Paper in proceedings, 2011

Broadband monolithic InGaP HBT frequency doublers for K-Band application have been developed. The designs employ a Gm-boosted differential common-base configuration using either capacitive or transformer-based coupling between base and emitters. The design with cross-coupled capacitors presents a fundamental rejection better than 20 dB over a 100% 3dB bandwidth, extending from 6-18 GHz. The transformer-coupled design has about 15dB fundamental rejection over a slightly narrower bandwidth extending from 7-16 GHz. Both doublers have conversion gain peaking at more than -0.8dB and output power more than 13 dBm.

Transformer balun

InGaP HBT

Capacitor-crossed coupling

Frequency Doubler

Author

J. Zhang

Queen's University Belfast

Herbert Zirath

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics

IET Seminar Digest. Active RF Devices, Circuits and Systems Seminar, 12 September 2011

Vol. 2011 6 29-32

Subject Categories

Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.1049/ic.2011.0210

ISBN

978-184919540-9

More information

Latest update

5/14/2018