An S-band metamaterial based high power backward-wave oscillator

Sweta Kumari, Pradip Kumar Jain and Manpuran Mahto
Department of Electronics and Communication Engineering,
National Institute of Technology, Patna-800 005, India
Dedicated to Prof B N Basu

An S-band metamaterial (MTM) based backward-wave oscillator (BWO) was designed. The RF interaction structure of the proposed metamaterial based backward-wave oscillator (MTM-BWO) comprises an array of complementary electric split ring resonator (CeSRR) unit cells that are periodically placed inside a circular waveguide. The electromagnetic properties (dispersion characteristics and interaction impedance) of the proposed CeSRR have been studied using the Eigen-mode Solver module of CST Studio. The operating frequency band of the CeSRR spans over 2.4 – 2.5 GHz, and the interaction impedance is greater than 500 Ω. Finally, PIC simulation of an S-band MTM-BWO has been carried out using the CST Particle Studio. The estimated peak output power is about 10 MW with a corresponding electronic efficiency of about 54% at 2.42 GHz for the beam voltage of 370 kV and beam current of 50 A. © Anita Publications. All rights reserved.
Keywords: Metamaterials, High power microwave (HPM), Microwave tubes, HPM oscillator.

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