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Very compact 60 GHz high efficiency power amplifier in coplanar technology

Flächenoptimierter koplanarer 60 GHz Leistungsverstärker mit hohem Wirkungsgrad

European Space Agency -ESA-, Paris:
Millimetre wave technology and applications. Antennas, circuits and systems. Proceedings of the 2nd ESA Workshop
Paris: ESA, 1998 (ESA WPP 149)
Workshop on Millimetre Wave Technology and Applications <2, 1998, Espoo>
Fraunhofer IAF ()
60 GHz; coplanar power amplifier; koplanarer Leistungsverstärker

We report on the development of a very compact 60 GHz high efficiency power amplifier operated at a bias voltage of only 3 V with a measured saturated output power of 200 mW. Due to the small chip size of 2 x 1 mm2 the amplifier has a power density of 100 mW/mm2 which is 80 per cent higher than the best results reported to date at this frequency. The combination of high output power and reduced chip size together with a state-of-the-art power added efficiency (PAE) of 21 per cent can be attributed to the use of 0. 15 mu m T-gate PHEMTs in combination with coplanar waveguide technology.