Solid State RF Chain for IFF Application.
Final technical rept. 5 Dec 67-24 Apr 69,
RAYTHEON CO WAYLAND MA WAYLAND LABS
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The study and investigation of techniques intended to lead to the development of a solid-state RF amplifier for advanced IFF transmitter applications is described. The characteristics of solid-state RF source devices are examined, with emphasis on peak power capability. Power combining methods are studied and particular attention is given to pulse compression techniques which function completely within the transmitter. A new pulse compression technique of this type, the Q-Switched Pulse Compressor, is described and analysed. This technique uses a high-Q cavity as a means of storing RF energy from a CW exciter, and a diode switch to periodically discharge the energy into a load to form output pulses. The design and development of an RF Chain breadboard model, constucted to demonstrate the feasibility of the technique, is described. The model uses an exciter consisting of six parallel channels of transistor amplifiers and varactor frequency multipliers to provide a power input to the pulse compressor of 140 watts at 1030 MHz. Peak-power outputs of 580 watts and 910 watts are obtained for two operating modes with a pulsee length of 0.12 microseconds. Author
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