Further Development of an Electronically Controllable Microwave Window.
Quarterly rept no. 3, 27 Jan-27 Apr 69,
RENSSELAER POLYTECHNIC INST TROY NY DIV OF ELECTROPHYSICS
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During this third reporting period we have studied, theoretically and experimentally, some of the operating characteristics of the window which are basic for optimizing the window design and have carried out extensive RF testing, low and high power, on fabricated windows for determining their power handling capabilities. The operating characteristics studied include current distribution due to the finite resistance of the injecting line structure, additional susceptance and loss increase caused by the metallic injecting line structure and optimum window aperture for maximum isolation. Consistently, X-band windows are now being fabricated which have an isolation of at least 15 dB at 5 amps bias. The low level loss of X- and S-band windows were measured and found to be 0.20 dB and 0.10 dB, respectively. High power tests show that unencapsulated windows are capable of handling 100 kW at S-band and 40 kW at X-band peak power. The average power handling capability is 100 watts in the on or worse state. The initial work on window encapsulation for improving peak and average power handling capabilities of the device is described. Author
- Electrical and Electronic Equipment