The latest addition to Comtech PST’s solid-state power amplifier (PA) product line, the BME69189-100 is a 100 W GaN PA developed to replace TWTs and microwave power modules (MPM) in communications, electronic warfare and radar transmitters, where space, cooling and power are limited.
Compact and light weight, the PA delivers 100 W saturated output power (typical) with greater than 46 dB gain from 6 to 18 GHz. The linear class AB design has a typical gain flatness of ±2 dB. Harmonics are less than −12 dBc for 2f0 and less than −22 dBc for 3f0, with spurious less than −60 dBc.
The PA can be biased with either +28 or +270 VDC and consumes less than 30 W standby power. A 9-pin combo D connector provides the DC power and control, including an enable/disable function via a 5.0 V TTL signal, which switches within 2 µs. The PA has a built-in test capability, triggering for excessive current, over temperature and high reflected power faults.
The BME69189-100 is housed in a compact 8 in. x 6 in. x 2.5 in. module, weighs 5.5 lbs. and, attached to an external heat sink, operates over a baseplate temperature range from −40°C to +75°C. The PA meets the shock and vibration levels of MIL-STD-810F.
This 6 to 18 GHz PA is compact, rugged and reliable, well-suited for replacing TWT/MPM amplifiers in many applications, with the added advantage of a soft failure mode.