Design and simulation study of double side-cavity gridless reltron with dual extraction sections

Abstract

Reltron is a high power microwave (HPM) oscillator with many attractive features. Here, we report a computer-aided design and simulation-based study of a double side-cavity (DSC) gridless reltron, which is an advancement of the conventional reltron. Commercially available software package CST Microwave Studio (MWS) has been used for the device simulation. The modulation section has been designed and studied by obtaining the S-parameters. From the electromagnetic (EM) field patterns and the frequencies of normal modes, we identify an extra mode in a DSC reltron, in addition to the three normal modes of a conventional reltron–(0, (Formula presented.), and π). Furthermore, the whole device has been modeled and simulated using particle in cell (PIC) solver to study the device performance under different post acceleration (PA) potentials. The use of the dual extraction section results in a peak efficiency of 38.6%. © 2020 Informa UK Limited, trading as Taylor & Francis Group.