A compact Ka band sub-harmonically resistive mixer MMIC using miniature hybrid elements

Kan Jen Cheng, Tsung Yu Yang, Hwann Kaeo Chiou

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


This work reports a compact monolithic subharmonically pumped resistive mixer (SPRM) with miniature hybrid elements which include a capacitive compensation balun and a reduced size power divider. This MMIC mixer was fabricated by using Win-semiconductors 0.15μm GaAs pHEMT technology. The proposed power divider utilizes a combination of shorted coupled lines instead of lumped inductors and capacitors. The traditional The length of Marchand balun are significantly reduced by shunted capacitors. The balun and divider are then applied in the design of a 28-GHz monolithic SPRM. As a result the dice area of SPRM only occupies 1.5mm2. The measured conversion loss of the mixer is less than 13 dB at an RF bandwidth of 27.5-28.5 GHz at 1 GHz fixed IF frequency, over 35 dB of LO-RF isolation, and a 9 dBm of 1-dB compression point.

Original languageEnglish
Title of host publicationAPMC 2005
Subtitle of host publicationAsia-Pacific Microwave Conference Proceedings 2005
StatePublished - 2005
EventAPMC 2005: Asia-Pacific Microwave Conference 2005 - Suzhou, China
Duration: 4 Dec 20057 Dec 2005

Publication series

NameAsia-Pacific Microwave Conference Proceedings, APMC


ConferenceAPMC 2005: Asia-Pacific Microwave Conference 2005


  • Balun
  • Microwave monolithic integrated circuit (MMIC) mixers
  • Power divider
  • Subharmonically pumped resistive mixer (SPRM)
  • pHEMT


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