Design of coaxial and waveguide couplers for helix TWT
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Mukesh Kumar Alaria
und
Sanjay Kumar Ghosh
Abstract
In this paper, two types of coaxial coupler and waveguide coupler for different frequency helix traveling wave tubes (TWTs) are designed, fabricated and cold tested. The coaxial coupler includes of window ceramic and RF transformer section. At present multi-section impedance transformer design approach is used for wideband helix TWTs. In any helix TWT, impedance of the source is transformed to the characteristic impedance of helix. This is done by the quarter-wavelength (λ/4) impedance transformation approach. The simulated results of different types of couplers are carried out by HFSS and CST microwave studio software and compare with experimental results. Three-dimensional electromagnetic field simulators allowing the any geometry with port excitations it is possible to model the complex coaxial and waveguide type couplers with helix SWS assembly and predict its desired return loss performances.
Funding source: ISRO
Acknowledgments
The authors are thankful to the Director, CSIR-CEERI, Pilani, for permission to publish this paper. This work was carried out under ISRO sponsored project.
Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Research funding: This study was funded by ISRO.
Conflict of interest statement: The authors declare no conflicts of interest regarding this article.
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Supplementary Material
The online version of this article offers supplementary material (https://doi.org/10.1515/freq-2020-0117).
© 2021 Walter de Gruyter GmbH, Berlin/Boston
Artikel in diesem Heft
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Artikel in diesem Heft
- Frontmatter
- Research Articles
- Compact and novel coupled line microstrip bandpass filter based on stepped impedance resonators for millimetre-wave communications
- Design and development of rigid coaxial line based variable stub tuner
- Design of coaxial and waveguide couplers for helix TWT
- Experimental evaluation of line-of-sight multiple input multiple output (MIMO) transmission for sub-6 GHz carrier frequencies
- Bending and SAR analysis on UWB wearable MIMO antenna for on-arm WBAN applications
- Compact cross-shaped parasitic strip based multiple-input multiple-output (MIMO) dielectric resonator antenna for ultra-wideband (UWB) applications
- A compact single element dielectric resonator MIMO antenna with low mutual coupling
- Conical dielectric resonator antenna for terahertz applications
- A multi-band planar antenna for biomedical applications
- Design and analysis of pentaband annular microstrip antenna using multiport network modeling
