Space Pulsed Terahertz Traveling Wave Tube Amplifier

Terahertz (THz) technology is widely used in military and aerospace fields due to its high frequency, and high bandwidth. By taking advantage of its short wavelength nature, a matching antenna can be used to achieve higher azimuth resolution, with a high frame rate in SAR mode operation and its larger access bandwidth resulting in higher range resolution. In this paper, a space pulsed THZ traveling-wave tube (TWT) amplifier with a frequency range of 210GHz~220GHz and a maximum pulse output power of more than 15W is introduced. The design and analysis of the 25kV high voltage power supply, the folded waveguide traveling wave tube, and the whole device are carried out. Within 10G bandwidth, pulse repetition frequency is 100Hz~10kHz, and within 50% duty cycle range, 10W saturated power output power in the full bandwidth range can be achieved, providing a reference for the subsequent aerospace design and application of THZ products.