Abstract: An S-band high-power tunable attenuator (HPTA) is proposed to adjust the output power of a 2.5 MW magnetron to the range of 40–2400 kW, which is equal to 0.17–17.78 dB attenuation.

We have designed, built, and tested a new magnetron tube that generates RF power at 1497 MHz. In the tests so far, the tube has produced CW 9 kW RF power, where the measured power is limited by the ...