Ultra-broadband common collector-cascode 4-cell distributed amplifier in 250nm InP HBT technology with over 200 GHz bandwidth
Paper in proceedings, 2017

An ultra broadband MMIC amplifier is designed using InP double-heterojunction bipolar transistors and its on-chip measurements are reported. The multi-cell distributed amplifier uses four gain cells where each consists of a common collector input stage followed by a cascode gain stage. The chip includes bias, decoupling and terminating circuits for the dc and RF interconnects; it measures 0.72 mm by 0.4 mm. It consumes 210 mW of power and can deliver up to 5.5 dBm of output power at 195 GHz. The amplifier achieves an average gain of 13.5 dB with an overall bandwidth over 200 GHz and a ± 2 dB gain ripple. The measurements indicate that this is the widest band dc-coupled amplifier reported to date and has the highest bandwidth reported among non-cascaded distributed amplifiers.


Transmission line measurements


Indium phosphide

Heterojunction bipolar transistors

Frequency measurement

III-V semiconductor materials


Stavros Giannakopoulos

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics

Izzat Darwazeh

Zhongxia Simon He

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics

Herbert Zirath

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics

Microwave Integrated Circuits Conference (EuMIC), 2017 12th European

Areas of Advance

Information and Communication Technology


Kollberg Laboratory

Subject Categories

Other Electrical Engineering, Electronic Engineering, Information Engineering



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