Design of coaxial and waveguide couplers for helix TWT

Author:

Alaria Mukesh Kumar1,Ghosh Sanjay Kumar1

Affiliation:

1. Microwave Tube Area , Central Electronics Engineering Research Institute (CEERI), Council of Scientific and Industrial Research (CSIR) , Pilani , Rajasthan , India

Abstract

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.

Publisher

Walter de Gruyter GmbH

Subject

Electrical and Electronic Engineering

Reference10 articles.

1. Gittins, J. F., Power Traveling Wave Tubes, American Elsevier, Negate Street, New York, 1994.

2. Gilmour, A. S.Jr., Principles of Traveling Wave Tube, Artech House Radar Library, Boston, London, 1994.

3. Collin, R. E., Foundations for Microwave Engineering, 2nd ed., John Wiley & Sons, INC., New York, 1992, pp. 343–349.

4. K. N. Shankara, “Indigenization of critical technologies for communication satellites,” IETE Tech. Rev., vol. 17, no. 6, pp. 325–333, 2000, https://doi.org/10.1080/02564602.2000.11416924. Taylor & Francis online.

5. Srivastava, V., Ghosh, T. K., Sharma, R. K., et al., Design of high efficiency Space TWTs, CriMico-2004, Weber Publ. Co., Sevastopol, Ukraine, 2004.

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