S-band 48% efficiency GaAs FET amplifier with 135 W output power for mobile communications satellite

We have developed a solid-state power amplifier for mobile communications satellites. The amplifier's peak output power exceeded 135 watts with an 48% power added efficiency S-band amplifier, which uses a harmonic controlled linear amplifier (HCLA) final stage. It has a linear gain of 54.0 dB under CW operation at 2.5 GHz. The carrier-to-third-order intermodulation ratio under two-tone operation is 22.5 dBc at a 3 dB output backoff. The overall unit size is 255/spl times/240/spl times/26 mm with a weight of 1900 g.<
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