Low Noise Amplifier with Bypass

802.11ac: 4.9 to 6.0 GHz

The GRF2541 is an ultra-low noise amplifier (LNA) with bypass designed for IEEE 802.11a/n/ac/p applications in the 5GHz band (5.1 GHz to 5.925 GHz). The device exhibits outstanding de-embedded noise figure (NF) of 1.0 dB along with a high, flat gain of approximately 16.4 dB over the band. Guerrilla Armor™ technology provides exceptional off-state isolation in the presence of high RF input signal levels in LNA disabled mode. The LNA is operated from a single positive supply of 2.7 to 5.0 V with a selectable Iddq range of 8 to 30 mA. The typical bias condition is 3.3 volts and 18 mA.

Consult with the GRF applications engineering team for application notes, custom tuning/evaluation board data and device s-parameters.


  • WiFi Access Points
  • Mobile WiFi Devices
  • Microwave Backhaul
  • 802.11p Vehicle Communications


Reference: 3.3V/18mA/5.5GHz
  • EVB NF: 1.2 dB
  • Gain: 16.4 dB
  • IP1dB: -10.2 dBm
  • Flexible Bias Voltage and Current
  • Internally Matched to 50 Ω
  • Process: GaAs pHEMT
  • U.S. Patents: 8,970,296 and 9,160,279

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