Wide-Band Low-Noise Amplifier for reliable Wireless Sensor Networks

This paper presents an implementation of a wideband low-noise amplifier (LNA) design operating at sub-GHz to be integrated in wireless sensor networks based on Wake-Up receivers to improve the range and latency of peer-to-peer communication. The design requirements meet the needs of Wake-Up Receiver nodes in terms of low power consumption. The design of the low-noise amplifier has been investigated based on appropriate simulations and validated with real measurements based on developed PCBs along the whole frequency band. The LNA delivered a power gain greater than 13 dB below 1 GHz, specifically 15 dB at 868 MHz and 17.45 at 740 MHz. Input and output reflection coefficients respectively were measured as −7.15 dB and −7.99 dB. The stability factor was kept greater than 1 along the whole frequency when the noise figure measurement is below 0.5 dB. With those results the wireless communication between sensor nodes could be improved with regard to range and in comparison to state of the art, the latency could be decreased. So quasi-real time communication even with energy autarkic wireless sensor nodes could be realized.