A method of suppressing mode competition in a coaxial localized-defect Bragg resonator operating in a higher-order mode

Lai, Ying-Xin; Zhang, Shi-Chang; Yang, Lei
June 2011
Physics of Plasmas;Jun2011, Vol. 18 Issue 6, p064506
Academic Journal
A coaxial localized-defect Bragg resonator has potential applications in high-power CARM oscillators. When it operates at sub-terahertz and terahertz frequencies, a higher-order mode is always required so as to get enough large geometry size. Analysis shows that higher-order mode operation may cause undesired mode competition due to the localized defect coupling the operating mode with its neighboring modes. A simple but efficient method is presented to solve the mode competition problem, where Hamming windowing-function distribution is separately applied to both sides of the localized defect.


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