PROJECT TITLE :

RF Design, Thermal Analysis, and Cold Test of a Ku-Band Continuous Wave Sheet Beam Traveling Wave Tube

ABSTRACT:

RF circuit design, thermal analysis, fabrication, and measurement of a continual wave (CW) high-power sheet beam traveling wave tube (SB-TWT) operating within the Ku-band were demonstrated during this paper. The slow wave structure circuit was constructed by double staggered grating waveguides (DSGWs), and also the lossy dielectrics attached in the H-plane were applied to suppress parasitic oscillations. The Particle-in-cell simulation predicted that the CW SB-TWT can give 20-kW output power in the band vary of 16.two-eighteen.5 GHz, with a maximum small signal gain of 38 dB. Microchannel cooling, that has been proved to be an economical cooling methodology for microelectronic chip, terribly massive scale integration, and power electronic modules with very high heat flux were introduced to boost the thermal capability and warmth dissipation ability. A thermal analysis of the RF circuit considering attenuated losses and electrons interception was studied well. Investigation shows that the RF circuit will operate with maximum ~1-kW dielectric loss power (one.5 times of the loss power generated from the saturated output power at center frequency) and a most of 7percent interception of electrons. Furthermore, an interaction circuit, as well as 23 DSGWs implanted with BeO-SiC to supply necessary attenuation, was fabricated and cold tested. Vector network analyzer RF measurement shows wonderful performance and agrees terribly well with our prediction.