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Input-Protected Low-Noise Amplifiers

Input-Protected Low-Noise Amplifiers
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A new line of input-protected low-noise amplifiers (LNAs) with no damage up to +30 dBm CW input power is ideal for radar systems, EW applications, military/microwave radios, wireless and satellite communications, and test instrumentation. The line consists of 12 different models that cover a broad range of frequency bands from 10 MHz to 3.5 GHz. These designs exhibit typical performance that includes low noise figure levels from 0.8 to 1.6 dB, high-small signal gain ranging from 25 to 40 dB, and low VSWR levels from 1.3:1 to 1.5:1. This performance is achieved through the use of hybrid MIC designs that incorporate PIN diode limiter circuitry and Enhancement mode (Emode) GaAs pHEMT semiconductor devices. These amplifiers operate with a bias voltage of +12V typical over the temperature range of -40 to +85ºC. The 50 ohm, SMA connectorized modules are unconditionally stable, include built-in voltage regulation, and have DC blocking capacitors on the RF ports.  

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