The Amplifier Research 175S1G4 is a solid-state broadband microwave amplifier delivering 175 watts minimum RF power across 0.8 GHz to 4.2 GHz instantaneously. Purpose-built for driver amplifier roles in wireless component testing and EMC applications, it combines high gain with low distortion through push-pull circuitry architecture.
Technical Specifications
• Rated Power Output: 175 W minimum; 190 W at 3 dB compression; 165 W at 1 dB compression
• Frequency Range: 0.8 GHz to 4.2 GHz (instantaneous bandwidth)
• Gain: 52.5 dB minimum; continuous adjustment across 15 dB minimum range in 4096 remote steps
• Input Power: 1.0 mW maximum for rated output
• Input Impedance: 50 Ω, VSWR 2.0:1 maximum
• Output Impedance: 50 Ω nominal
• Third Order Intercept Point (IP3): 61 dBm typical
• Harmonic Distortion: −20 dBc maximum at 160 W
• Spurious Signals: −73 dBc typical
• Phase Linearity: ±1.0 deg/100 MHz typical
• Primary Power: 90–132 VAC or 180–264 VAC auto-selected; 50/60 Hz single phase; 1050 W maximum consumption
– Key Features
• Mismatch tolerant: operates without damage or oscillation at 100% rated power under any load impedance magnitude and phase
• Automatic Level Control (ALC) with front panel threshold adjustment and RF output protection
• Faithful reproduction of AM, FM, and pulse modulation envelopes
• Air-cooled, self-contained design in portable form factor
• Digital Control Panel with local and remote operation via IEEE-488 interface
• Real-time forward and reflected power display with status reporting
– Typical Applications
• Driver amplifier stage for wireless and communication component testing
• EMC and radiated immunity testing requiring undistorted modulation fidelity
• Broadband RF source for subsystem characterization across L-, S-, and C-band frequencies
– Compatibility & Integration
IEEE-488 remote interface supports integration into automated test systems. Menu-driven softkey control with rotary encoder adjustment enables rapid gain reconfiguration across the 15 dB adjustment range.
