Mode conversion of high-power electromagnetic microwave using coaxial-beam rotating antenna in relativistic backward-wave oscillator

Sun Hong Min, Hoe Chun Jung, Gun Sik Park, Jihwan Ahn, Sang Heun Lee, Young Joong Yoon, Junyeon Kim, Jun Ho Choi, Joonho So

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Mode conversion of high-power electromagnetic microwave (HPEM) was successfully accomplished using a coaxialbeam rotating antenna (COBRA) in an X-band relativistic backward-wave oscillator (RBWO). The mode conversion from the TM 01 mode to the circularly polarized TE 11 -likeness mode was identified by both cold test and hot test. To observe whether mode conversion is effective or not, the radiation pattern of TE 11 - likeness mode by COBRA lens was compared with the case of the radiation pattern of TM 01 mode using simple horn antenna. Their radiation patterns could be described by fluorescent lamps. The experimental results of radiation pattern measurements are shown to be in a reasonable agreement with the simulated one. The maximum value of RF output power appeared at the center of COBRA lens from the experimental results.

Original languageEnglish
Article number5446350
Pages (from-to)1391-1397
Number of pages7
JournalIEEE Transactions on Plasma Science
Issue number6 PART 1
Publication statusPublished - 2010 Jun 1


All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

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