Fairview Microwave has announced new RF limiting amplifiers that are commonly used in electronic warfare, microwave receivers and broadband communications systems to protect components from high input power levels while providing constant output over a wide input dynamic range.
Fairview’s new limiting amplifiers consist of 4 models that operate from 1 to 18 GHz. They achieve excellent technical performance from hybrid MIC assemblies that utilize advanced GaAs PHEMT semiconductors. Each model produces high gain levels ranging from 40 to 80 dB typical and can handle a wide dynamic range of input power levels from -61 dBm to +20 dBm, while generating a limited output power level between +15 to +19 dBm. Saturated output power deviation is ±0.5 dB typical over the specific frequency range.
The new broadband limiting amplifiers are available in compact SMA connectorized packages that are hermetically sealed and are designed to withstand harsh environmental conditions with operating temperatures ranging from -30 to +70 degrees C. For added reliability, additional design features are incorporated including built-in voltage regulation, bias sequencing, reverse bias protection, and overvoltage protection is installed externally for easy repair. These limiting amplifiers are unconditionally stable and fully matched internally for 50 Ohm input and output, which eliminates the customers need for any additional sensitive external RF tuning components.
