A 4.3 to 5.7 GHz frequency-agile receiver for rapidly-changing channels

This work reports a frequency-agile receiver front-end for rapidly changing channels. The receiver includes a programmable low noise amplifier (LNA) that can be tuned from 4.3 to 5.7 GHz using an all-digital phase-locked loop (ADPLL). It also includes a power detector, a 10-bit SAR ADC, and a closed-loop system to dynamically optimize the matching of the LNA.