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A 300GHz quadrature down-converter S-MMIC for future terahertz communication

: Dan, Iulia; Grötsch, Christopher M.; Schoch, Benjamin; Wagner, Sandrine; John, Laurenz; Tessmann, Axel; Kallfass, Ingmar


Institute of Electrical and Electronics Engineers -IEEE-:
IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems, COMCAS 2019 : 4-6 November 2019, Tel-Aviv, Israel
Piscataway, NJ: IEEE, 2019
ISBN: 978-1-5386-9549-4
ISBN: 978-1-5386-9548-7
ISBN: 978-1-5386-9550-0
6 S.
International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS) <2019, Tel Aviv>
Fraunhofer IAF ()
300 GHz wirelesss communication; broadband receiver; low-noise amplifier (LNA); submillimeter-wave monolithic integrated circuit (S-MMIC); metamorphic high electron mobility transistor technology (mHEMT)

This paper presents a highly broadband quadrature down-converter with a center frequency of 300GHz and a low noise amplifier (LNA) with a bandwidth of 80GHz.The operation frequency between 235GHz and 315GHz enables the usage in future wireless high data rate applications. The submillimeter-wave monolithic integrated circuits(S-MMICs)are realized using a 35 nm metamorphic high electron mobility transistor(mHEMT) technology based on InAlAs/InGaAs. The down-converter integrates a frequency multiplier by four, a buffer amplifier and a passive fundamental I/Q mixer and reaches a conversion gain of -15dB and an RF bandwidth of 60GHz. The low-noise amplifier has an average gain of 26dB over the 3dB bandwidth. A total conversion gain of the receiver of 11dB is therefore reached by combining the down-converter and the LNA.