Research on the Test Method of Output Hot Standing Wave of High Power TWT

In this paper, the measurement principle of TWT output hot standing wave is analyzed, and the test method of hot standing wave based on vector network analyzer (VNA) is put forward. The feasibility of this method is preliminarily proved by analyzing and comparing the test results of the TWT output cold standing wave, and the output hot standing wave of $\mathbf{L}$ band TWT is measured in saturated and small signal states.