Power combining by a Fabry-Perot resonator with active devices mounted on both the mirrors

M. Sanagi, S. Nogi

Research output: Contribution to journalArticlepeer-review


A power combining technique using a Fabry-Perot resonator with many more active devices is investigated. The Fabry-Perot power combiner consists of two mirrors with a circular groove mounted with the active devices. The power combiner has an axially symmetrical structure and operates at an axially symmetrical TEM01n mode so that uniform device-field coupling required for perfect power combining can be realized. By numerical calculation using the boundary element method, it was shown that high combining efficiency can be obtained when the active devices are mounted in the circular groove of larger radius on either of the two mirrors. In experiments at X-band, power combining efficiency over 90% was obtained for the case of twelve devices on either of the mirrors and the output powers of the twenty or twenty-four devices on both the mirrors were almost perfectly combined.

Original languageEnglish
Pages (from-to)1575-1580
Number of pages6
JournalIEICE Transactions on Electronics
Issue number10
Publication statusPublished - Oct 2001


  • Axially symmetrical TEM mode
  • Device-field coupling
  • Fabry-Perot resonator
  • Microwave
  • Power combining

ASJC Scopus subject areas

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


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