New, High Efficiency RF Sources

Calabazas Creek Research, Inc. is developing several high efficiency RF sources ranging in frequency from 300 MHz to 2.45 GHz and higher at power levels ranging from a few kW to more than 200 kW CW. Applications range from driving high energy accelerators and colliders to high data rate communications. All devices are designed to provide efficiencies exceeding 80%. These devices include (1) a phase and amplitude controlled magnetron producing 100 kW at 1.3 GHz using phase modulation of a locking RF signal, (2) a multiple beam triode-based RF sources to produce 200 kW from 300-500 MHz, (3) a high efficiency klystron to produce 100 kW CW at 1.3 GHz, (4) a multiple beam inductive output tube to produce 200 kW at 700 MHz, and (5) a magnetron with frequency and phase control provided by varactor diodes to produce 5 kW CW at 2.45 GHz capable of 2Mb/second data transmission rate. The amplitude-controlled magnetron has been completed and tested, and the high efficiency klystron and triode-based source are being assembled with testing schedule for spring 2022. Drawings are in progress for the multiple beam IOT, and the design of the varactor-controlled magnetron is in progress. These devices will be described and available test results presented.