Amplifier Research KAW4040

The Amplifier Research KAW4040 is a 500 W CW RF power amplifier for EMC testing, communications, and research applications. Operating across 200 MHz to 500 MHz instantaneously with optional optimization over 390–410 MHz, it delivers 57 dB minimum gain with ±2.0 dB flatness unleveled and ±0.5 dB leveled. The amplifier achieves rated 500 W output from 1.0 mW maximum input, with 30 dB typical gain adjustment range and infinite VSWR mismatch tolerance.

Technical Specifications

• Rated Power Output: 500 W CW


• Frequency Response: 200 MHz to 500 MHz instantaneously; custom optimization available 390–410 MHz


• Input for Rated Output: 1.0 mW maximum


• Power Output @ 1 dB Compression: 500 W


• Gain: 57 dB minimum; 30 dB typical adjustment range


• Input/Output Impedance: 50 Ω nominal


• Gain Flatness: ±2.0 dB unleveled; ±0.5 dB leveled


• Harmonic Distortion: –20 dBc maximum


• Spurious Outputs: –70 dBc maximum


• Mismatch Tolerance: Infinite


• Primary Power: 187–265 VAC, 47–63 Hz, single-phase; 2.5 kVA typical / 2.8 kVA maximum


• Operating Temperature: –10 to 40 °C


• Relative Humidity: 80% to 31 °C, decreasing linearly to 50% at 40 °C


• Altitude: Up to 2000 m

Key Features

• Automatic Level Control (ALC) with Fast/Slow settings


• Overdrive protection and VSWR protection


• Input blanking for standby mode operation


• Over-temperature protection


• Modulation capability for AM, FM, and pulse modulation


• Forward and reflected power metering (0–500 W range)


• Forced-air cooling with self-contained fans

Typical Applications

• EMC and compliance testing


• Communications system development


• RF research and measurement


• High-power signal generation

Compatibility & Integration

• RF connectors: Type N female


• Remote control: IEEE 488.2 (24-pin female) and RS-232 (25-pin D-subminiature female)


• Remote interlock: BNC female


• 19-inch rack mounting (15¾ inches panel space required)


• Cabinet: 43" H × 28" W × 28" D; 179 lbs net weight


• Configurable without cabinet for OEM integration