A. Tessmann, A. Leuther, V. Hurm, H. Massler, S. Wagner, M. Kuri, M. Zink, M. Riessle, H. Stulz, M. Schlechtweg, O. Ambacher
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A Broadband 220-320 GHz Medium Power Amplifier Module
In this paper, we present the development of an ultra-broadband H-band (220 - 325 GHz) submillimeter-wave monolithic integrated circuit (S-MMIC) medium power amplifier (MPA) module for use in next generation high-resolution imaging systems and communication links operating around 300 GHz. Therefore, a variety of compact amplifier circuits has been developed by using an advanced 35 nm InAlAs/InGaAs based depletion-type metamorphic high electron mobility transistor (mHEMT) technology in combination with grounded coplanar waveguide (GCPW) circuit topology. A three-stage amplifier S-MMIC based on compact cascode devices was realized, demonstrating a maximum gain of 22.2 dB at 294 GHz and a small-signal gain of more than 16 dB over the frequency range from 184 to 312 GHz. Finally, mounting and packaging of the monolithic amplifier chip into a WR-3.4 waveguide module was accomplished with only minor reduction in circuit performance.
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