A miniature 18-38GHz pHEMT MMIC frequency doubler

W. C. Chien, C. H. Liu, S. H. Hung, Y. C. Lee, Y. H. Wang

Research output: Chapter in Book/Report/Conference proceedingConference contribution


A novel MMIC frequency doubler using a GaAs-based pHEMT process is proposed to achieve a miniature area and simplified layout. The circuit configuration is composed of a spiral balun, two common-source transistors, and a band pass filter with a dc-isolated capacitor, for an 18-38 GHz broadband operation. Both the spiral balun and the band pass filter are directly connected to the DC bias. The topology of the frequency doubler can thus be simplified to reduce the use of the bias components, such as the inductor. Thus, this doubler design of the chip size was considerably small and the operating bandwidth was wide. The spiral balun with bias also provide to suppress the fundamental frequency and reduce chip dimension. The fabricated frequency doubler results in a compact core chip size of 0.50 mm 2, a 0.5-5 dB conversion loss, and an output power of 5 to 9.5 dBm at an input power of 10dBm.

Original languageEnglish
Title of host publicationPIERS 2011 Suzhou - Progress in Electromagnetics Research Symposium, Proceedings
Number of pages5
Publication statusPublished - 2011
EventProgress in Electromagnetics Research Symposium, PIERS 2011 Suzhou - Suzhou, China
Duration: 2011 Sep 122011 Sep 16

Publication series

NameProgress in Electromagnetics Research Symposium
ISSN (Print)1559-9450


OtherProgress in Electromagnetics Research Symposium, PIERS 2011 Suzhou

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials


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