Taking solid-state power to lev- els formerly captive to tubes, Comtech PST has developed an 8 kW GaN-based power amplifier (PA) for X-Band radar applications. Operating over any 1000 MHz instantaneous bandwidth between 9 and 10.5 GHz, the BMPC9X89X8-8000 provides 8 kW pulsed peak output power, with pulse widths up to 100 us and a maximum 10 percent duty cycle. Rise and fall times are less than 25 ns, and pulse droop is typically under 0.15 dB/μs. The gain at rated power is typically 69 dB. Harmonics are no greater than -60 dBc at full output, and the amplifier's phase noise is -108 dBc/Hz at 100 Hz offset from the carrier. With the RF off, the noise floor drops to -170 dBm/Hz typical.
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