[d--y--i]

Cute idea, works only in a very narrow range of scenarios, namely: dense urban without strong near-CW interferers: It has a sensitivity of -70dBm, so it misses >50dB of the bottom dynamic range, present typically in urban indoor and also in non-urban areas. And it get saturated by any strong signal, so it will fail near FM stations, microwave links, and any other transmitter with near-constant signal. This type of wideband non-rf-filtered design usually has too many failure modes in real-world tests to become an actual useful product.