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A new class of spatial harmonic magnetrons with potentials for CW and sub-THz operation

Published online by Cambridge University Press:  22 February 2023

Nasrin Nasr Esfahani Open the ORCID record for Nasrin Nasr Esfahani [Opens in a new window] ,
Dmytro M. Vavriv  and
Klaus Schünemann Open the ORCID record for Klaus Schünemann [Opens in a new window]
Nasrin Nasr Esfahani*
Affiliation:
Hamburg University of Technology (TUHH), Am Schwarzenberg-Campus 1, 21073 Hamburg, Germany
Dmytro M. Vavriv
Affiliation:
Institute of Radio Astronomy of the National Academy of Sciences of Ukraine (IRA NASU), 4, Mystetstv St., Kharkiv, 61002, Ukraine
Klaus Schünemann
Affiliation:
Hamburg University of Technology (TUHH), Am Schwarzenberg-Campus 1, 21073 Hamburg, Germany
*
Author for correspondence: Nasrin Nasr Esfahani, E-mail: Nasrin.Esfahani@ieee.org
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Abstract

A strictly physically based design theory of a new class of Spatial Harmonic Magnetrons (SHM) is thoroughly derived which leads to analytically evaluable expressions. Thus two advantages are obtained: (1) The design parameters appear grouped into two separate categories – one just containing geometrical and material parameters, the other one exclusively containing beam current-related ones, which are in product-form determining performance. The influence of each parameter can thus easily be discovered and investigated. (2) Numerical efforts for any new design will be reduced by at least one order of magnitude. Subsequently and based on feature (1) it is derived that loading the anode structure by a suitably selected meta-material will increase output power and efficiency, will pave the way to CW operation, and can extend oscillation frequency well into the sub-THz range. Finally, it is shown that the Rising Sun Magnetron is a first step toward a meta-material loaded SHM offering the same but quantitatively reduced features and less stringent requirements to fabrication technology.

Keywords

Magnetronmeta-materialmicrowave tubessub-THz CW signal generators
Type
Oscillators
Information
International Journal of Microwave and Wireless Technologies , Volume 15 , Special Issue 8: EuCAP 2022 Special Issue , October 2023 , pp. 1308 - 1318
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Copyright
© The Author(s), 2023. Published by Cambridge University Press in association with the European Microwave Association

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