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110 GHz Amplifiers Based on Compact Coplanar W-Band Receiver Technology

110 GHz-Verstärker auf der Basis einer kompakten, koplanaren Empfänger-Schaltungstechnik


IEEE Electron Devices Society; IEEE Microwave Theory and Techniques Society:
17th GaAs IC Symposium 1995. Technical Digest
New York, NY: IEEE, 1995
ISBN: 0-7803-2966-X
ISBN: 0-7803-2967-8
ISBN: 0-7803-2968-6
GaAs IC Symposium <17, 1995, San Diego/Calif.>
Fraunhofer IAF ()
Cascode-FET; Millimeter-Verstärker; Millimeter wave amplifiers; pseudomorpher MODFET; pseudomorphic MODFET

The potential of coplanar waveguide technology to build compact system modules Is demonstrated by means of passive and active MMIC components. The realized passive structures comprise a Wilkinson combiner/divider and a capacitively loaded ultra miniature branch line coupler. Very good agreement between the measured and modelled data is achieved up to 120 GHz. A Cascode MODFET small signal model working up to above 100 GHz has been developed for predictable MMIC design. Based on an accurate design database, a compact Integrated amplifier utilizing cascode circuitry for application in the 100-120 GHz frequency band has been fabricated showing a measured maximum gain of 20 dB at 110 GHz. The gain Is comparable to the result of a 2-stage amplifier fabricated using 0.1 mym gate PHEMTs, while the chip size is reduced by more than 50 %.