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

doi:10.1109/TPS.2010.2042464

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

Department of Electrical and Electronic Engineering

Research output: Contribution to journal › Article › peer-review

20 Citations (Scopus)

Abstract

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 TM₀₁ mode to the circularly polarized TE₁₁-likeness mode was identified by both cold test and hot test. To observe whether mode conversion is effective or not, the radiation pattern of TE₁₁- likeness mode by COBRA lens was compared with the case of the radiation pattern of TM₀₁ 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 language	English
Article number	5446350
Pages (from-to)	1391-1397
Number of pages	7
Journal	IEEE Transactions on Plasma Science
Volume	38
Issue number	6 PART 1
DOIs	https://doi.org/10.1109/TPS.2010.2042464
Publication status	Published - 2010 Jun

Bibliographical note

Funding Information:
Manuscript received October 15, 2009; revised January 15, 2010; accepted January 19, 2010. Date of publication April 12, 2010; date of current version June 9, 2010. This work was supported by the Basic Science Research Program through the National Research Foundation of Korea funded by the Ministry of Education, Science, and Technology (Grant 2009-0083512).

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
Condensed Matter Physics

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10.1109/TPS.2010.2042464

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

abstract = "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 TM01 mode to the circularly polarized TE11-likeness mode was identified by both cold test and hot test. To observe whether mode conversion is effective or not, the radiation pattern of TE11- likeness mode by COBRA lens was compared with the case of the radiation pattern of TM01 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.",

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

note = "Funding Information: Manuscript received October 15, 2009; revised January 15, 2010; accepted January 19, 2010. Date of publication April 12, 2010; date of current version June 9, 2010. This work was supported by the Basic Science Research Program through the National Research Foundation of Korea funded by the Ministry of Education, Science, and Technology (Grant 2009-0083512).",

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doi = "10.1109/TPS.2010.2042464",

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AU - Min, Sun Hong

AU - Jung, Hoe Chun

AU - Park, Gun Sik

AU - Ahn, Jihwan

AU - Lee, Sang Heun

AU - Yoon, Young Joong

AU - Kim, Junyeon

AU - Choi, Jun Ho

AU - So, Joonho

N1 - Funding Information: Manuscript received October 15, 2009; revised January 15, 2010; accepted January 19, 2010. Date of publication April 12, 2010; date of current version June 9, 2010. This work was supported by the Basic Science Research Program through the National Research Foundation of Korea funded by the Ministry of Education, Science, and Technology (Grant 2009-0083512).

PY - 2010/6

Y1 - 2010/6

N2 - 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 TM01 mode to the circularly polarized TE11-likeness mode was identified by both cold test and hot test. To observe whether mode conversion is effective or not, the radiation pattern of TE11- likeness mode by COBRA lens was compared with the case of the radiation pattern of TM01 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.

AB - 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 TM01 mode to the circularly polarized TE11-likeness mode was identified by both cold test and hot test. To observe whether mode conversion is effective or not, the radiation pattern of TE11- likeness mode by COBRA lens was compared with the case of the radiation pattern of TM01 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.

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

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

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