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Ahead of Print article · Journal article

A Highly Linear Dual Stage Amplifier with Beyond 1.75 THz Gain-Bandwidth-Product

By Shivan, T.1; Hossain, M.1; Doerner, R.1; Yacoub, Hady1; Johansen, Tom Keinicke2,3; Heinrich, W.1; Krozer, Viktor1

From

Ferdinand-Braun-Institut1

Department of Electrical Engineering, Technical University of Denmark2

Electromagnetic Systems, Department of Electrical Engineering, Technical University of Denmark3

This work reports a multi-purpose highly linear ultra-wideband amplifier with a gain bandwidth product (GBP) of 1.75 THz, the highest reported in any MMIC process. A transimpedance amplifier is cascaded with a distributed amplifier, emulating a receiver subsystem. Using a diamond heat spreader, to dissipate heat from transistors, the cascaded amplification subsystem can achieve very high OIP3 from 20 to 24 dBm when measured between 5 to 65 GHz.

A small signal average gain of 24 dB is observed over a frequency range exceeding the maximum measurable bandwidth from DC to 110 GHz. Compared with other ultra-wideband MMIC amplifiers beyond 110 GHz bandwidth, the circuit offers a unique combination of high linearity (OIP3) and high gain. As a result, the cascaded amplifier is suitable for applications in optical-electrical converters, spectroscopy and ultrawideband measurement systems in the sub-THz frequency range.

Language: English
Publisher: IEEE
Year: 2021
Pages: 717-720
ISSN: 15311309 and 15581764
Types: Ahead of Print article and Journal article
DOI: 10.1109/LMWC.2021.3067145
ORCIDs: Johansen, Tom Keinicke
Keywords

Distributed amplifier (DA) Gain bandwidth product (GBP) InP double heterojunction bipolar transistor (DHBT) Monolithic microwave integrated circuit (MMIC)

Other keywords

Bandwidth DH-HEMTs Gain Linearity Optical buffering Optical fiber amplifiers Optical variables measurement distributed amplifier (DA) monolithic microwave integrated circuit (MMIC)

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