Compact 28-GHz subharmonically pumped resistive mixer MMIC using a lumped-element high-pass/band-pass balun

Ping Chun Yeh, Wei Cheng Liu, Hwann Kaeo Chiou

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

Abstract

This work reports a novel lump-element balun for use in a miniature monolithic subharmonically pumped resistive mixer (SPRM) microwave monolithic integrated circuit. The proposed balun is simply analogous to the traditional Marchand balun. The coupled transmission lines are replaced by lump elements, significantly reducing the size of the balun. This balun requires no complicated three-dimensional electromagnetic simulations, multilayers or suspended substrate techniques; therefore, the design parameters are easily calculated. A 2.4-GHz balun is demonstrated using printed circuit board technology. The measurements show that the outputs of balun with high-pass and band-pass responses, a 1-dB gain balance, and a 5° phase balance from 1.7 to 2.45 GHz. The balun was then applied in the design of a 28-GHz monolithic SPRM. The measured conversion loss of the mixer was less than 11 dB at a radio frequency (RF) bandwidth of 27.5-28.5 GHz at a fixed 1 GHz IF, a local oscillator (LO)-RF isolation of over 35 dB, and a 1-dB compression point higher than 9 dBm. The chip area of the mixer is less than 2.0 mm2.

Original languageEnglish
Pages (from-to)62-64
Number of pages3
JournalIEEE Microwave and Wireless Components Letters
Volume15
Issue number2
DOIs
StatePublished - Feb 2005

Keywords

  • Baluns
  • Microwave monolithic integrated circuit (MMIC) mixers
  • Subharmonically pumped resistive mixer (SPRM)
  • pHEMT

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