Role of Material on the Performance of Multi-stage Depressed Collectors

Travelling Wave Tubes (TWTs) are microwave amplifiers that are capable of offering wideband operation and high efficiency. Multi-stage depressed collectors (MDCs) are used to enhance the efficiency of the TWT. The performance of the MDC is highly dependent on the right selection of materials for its electrodes and insulators. Basis for selection is determined by several factors like: (i) electrical, (ii) thermal, (iii) structural, and (iv) weight. Potential materials that can be used for the electrode and insulator, are extensively studied based on several criteria, which would in turn help other researchers in their material selection process.