A 16-31 GHz MINIATURE QUADRUPLE SUBHARMONIC MONOLITHIC MIXER WITH LUMPED DIPLEXER

Abstract

Abstract-A novel 16-31 GHz quadruple subharmonic monolithic passive mixer with a chip dimension of 0.82 × 0.7 mm 2 is designed and fabricated using the 0.15 µm GaAs pHEMT process. The novel configuration of the quadruple subharmonic mixer consists of a lumped frequency diplexer and a low-pass filter utilizing a pair of anti-parallel Schottky barrier diode to achieve quadruple subharmonic mixing mechanism. The lumped frequency diplexer formed with a low-pass network and a high-pass network is used to reduce the chip dimension while operating at low frequency band and to improve the isolation between the RF and LO ports with a broadband operation. The lowpass filter supports an IF frequency range from DC to 2.5 GHz. From the measured results, the mixer exhibits a 12.5-16.5 dB conversion loss, a LO-to-RF isolation better than 15 dB, a 50-59 dB high 4LO-to-RF isolation over 16-31 GHz RF bandwidth, and an input 1 dB compression power of 2 dBm.

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Millimeter Wave Subharmonic Mixer Implementation Using Graphene Film Coating

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