Journal ArticleDOI
A TE 01 -HE 11 Mode Conversion System
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TLDR
Based on the coupled wave theory, the TE01-HE11 mode conversion system has been designed and tested as discussed by the authors, which is done in three steps: a smooth wall gradual TE01 mode bend with an arc radius 550mm long is designed to satisfy the demands of the system.Abstract:
Based on the coupled wave theory, the TE01-HE11 mode conversion system has been designed and tested. The system is done in three steps. First, a smooth wall gradual TE01 mode bend with an arc radius 550-mm long is designed to satisfy the demands of the system. Second, a 595-mm-long waveguide converts TE01 mode to TM11 mode. Third, a 415.5-mm-long corrugated circular waveguide is designed to excite HE11 mode. The above designs are all verified by Commercial Microwave Studio CST Software. The calculation shows that the transmission efficiency of the whole system is over 95 % at the frequency of 35 GHz. The calculations, the simulations, and the test results are in well agreement.read more
Citations
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Journal ArticleDOI
TM 11 to HE 11 mode converter in overmoded circular corrugated waveguide
TL;DR: In this paper, the authors designed and analyzed a hybrid mode converter at 42±0.2 GHz, which is an integral component of the transmission line that transmits 200 kW power from gyrotron to the plasma in SST-1 Aditya tokamak.
Journal ArticleDOI
A Gaussian-Like Beam Output System for High-Power Ka-Band Gyro-TWT
TL;DR: In this paper, an output system, consisting of a waveguide taper, a 90° waveguide bend, a corrugated waveguide horn, and an RF output window, which can output a Gaussian-like beam rather than a circular waveguide TE0, 1 mode in a broadband for a Ka-band gyrotron traveling-wave tube (gyro-TWT) has been developed and tested.
References
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ReportDOI
Mode converters for generating the HE 11 (gaussian like) mode from TE 01 in a circular waveguide
TL;DR: In this article, the authors reported measurements on mode converters to transform the TE01 mode into HE11 for electron cyclotron heating (ECH) experiments, and the overall efficiency of conversion from TE01 to HE11 exceeds 91% over a measured range of 59.2 to 60.1 GHz.
Journal ArticleDOI
Method for synthesis of waveguide mode converters
TL;DR: In this paper, an iterative method for synthesis of waveguide mode converters is proposed, which offers fundamentally new solutions to the problems of mode converter development, and examples of synthesized converters calculated using this method are presented.
Journal ArticleDOI
High power mode conversion for linearly polarized HE11 hybrid mode output
TL;DR: In this paper, a quasi-optical hybrid mode can be generated from TE 0n gyrotron mode compositions by the two multi-step mode conversion processes: (1) TE0n to TE01 to TE11 to HE11 or (2) ΣTE 0n toTE01 to TM 11 to HE 11).
Journal ArticleDOI
Mode conversion due to curvature in corrugated waveguides
Hongfu Li,Manfred Thumm +1 more
TL;DR: In this article, the curvature coupling coefficients in corrugated circular waveguides are examined in detail, starting from Maxwell's equations, and a strict derivation is given for the curvatures coupling coefficients formulae.
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