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Affiliation of Author(s):[1]Univ Elect Sci & Technol China, Sch Elect Sci & Engn, Chengdu 610054, Peoples R China;[2]Lab Electromagnet Space Cognit & Intelligent Contr, Beijing 100089, Peoples R China

Journal:IEEE TRANSACTIONS ON ELECTRON DEVICES

Key Words:Metamaterials; Electromagnetic waveguides; Oscillators; Mirrors; Dispersion; Circuit stability; Optical waveguides; Backward oscillation (BWO) stability; gyro-amplifier; metamaterial; phase compensation; planar circuit; quasi-optical

Abstract:In this article, a planar quasi-optical waveguide (PQOW) circuit is proposed for vacuum electron devices (VEDs) for the first time. The circuit is made of a series of metamaterial pillars attached to a pair of parallel plates for phase compensation. It can propagate quasi-optical modes as a pair of concave mirrors does, while the lower order HE(0n )modes experience much heavier circuit loss compared to that of convention confocal waveguide circuits, which can improve the backward oscillation (BWO) stability of gyro-amplifiers. As an example, a W-band gyro-amplifier with PQOW circuits to replace conventional confocal circuits is designed. The 3-D particle-in-cell simulation demonstrated that the circuit is capable of producing stable high-power radiation within 96-108 GHz, with an electron efficiency of about 15% over the entire bandwidth.

First Author:Yelei Yao et al.

Document Type:Article

Volume:70

Issue:6

Page Number:3288-3294

ISSN No.:0018-9383

Translation or Not:no

Release time:2025-05-23