Design of Coaxial Couplers for High Efficiency Helix TWT |
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Authors: | Mukesh Kumar Alaria A K Sinha A Bera and V Srivastava |
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Institution: | (1) Microwave Tubes Area, Central Electronics Engineering Research Institute, Pilani, 33303 1, India |
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Abstract: | The main objective of the paper is to make an efficient design of the input and output coaxial coupler for a helix TWTs. An
approach has been developed for the efficient design and analysis of the coaxial couplers in the practical situation. Normally
multi-section impedance transformer approach is used for any wide band coupler. For a space helix TWT, coupler should be wide
bandwidth and small size. In this case coupler is matched with helix slow wave structure and the standard 50-ohm connectors.
The simulated return loss (dB) profile for different type of couplers is obtained by using Ansoft HFSS, CST microwave studio
and compares those with experimental results. The tip loss design at sever ends for the input and the output section has been
also optimized. |
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Keywords: | Helix Window RF multi-section transformer WR-75 waveguide |
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