[GreatScott] does exactly this in the video after the break, building both a transmitter and receiver. At the most basic level, AM radio works by generating a carrier wave with an oscillator ...

Smith] from the University of Washington, which purports to construct a low-throughput RF transmitter from little ... offering 13.6 dBi of gain. The receiver is a pair of high-gain LNAs, a ...

The transmitter sends short bursts of single-tone RF signals at low and high frequencies (700 to 1,000 megahertz and 2.3 to 2.5 gigahertz) through the soil sample. The receiver's power spectrum ...