A 16-31 GHz miniature quadruple subharmonic monolithic mixer with lumped diplexer

C. M. Lin, J. T. Chang, C. C. Su, S. H. Hung, Y. H. Wang

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


A novel 16-31GHz quadruple subharmonic monolithic passive mixer with a chip dimension of 0.82 × 0.7mm2 is designed and fabricated using the 0.15μm 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 low-pass filter supports an IF frequency range from DC to 2.5GHz. From the measured results, the mixer exhibits a 12.5-16.5dB conversion loss, a LO-to-RF isolation better than 15dB, a 50-59dB high 4LO-to-RF isolation over 16-31GHz RF bandwidth, and an input 1dB compression power of 2dBm.

Original languageEnglish
Pages (from-to)21-30
Number of pages10
JournalProgress in Electromagnetics Research Letters
Publication statusPublished - 2009

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials


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