Reliable Wake-up Receiver with Increased Sensitivity using Low-Noise Amplifiers

For power-limited wireless sensor networks, energy efficiency is a critical concern. Receiving packets is proven to be one of the most power-consuming tasks of a wireless sensor node. Wake-up receivers enable asynchronous communication while maintaining low power consumption. Recent wake-up receiver designs have low sensitivity, high power consumption, or lack of reliability and reproducibility. The proposed receiver circuit utilizes a two-stage low-noise amplifier to achieve a sensitivity of -80 dBm. A duty-cycling approach was introduced to reduce the average power consumption to 14.2
$\mu \mathrm{W}$
. The reliability of the proposed design was ensured by introducing a special low-frequency modulation scheme. The reproducibility of the design was ensured by only using commercial off-the-shelf components.