Generally such circuits must work at radio frequency and power levels, which imposes special constraints in their project. These constraints increase in their importance sustaining higher frequencies. At microwave frequencies, the reactance of signal traces becomes a important section of the physical layout of the circuit.

Listing of radio electronics topics: RF oscillators: PLL, VCO Transmitters, Transmission lines, RF connectors, Antennas, Antenna theory, List of antenna terms Receivers, Tuners Amplifiers Modulators, demodulators, detectors RF filters RF shielding, Ground plane PCB layout guidelines DSSS, Noise power Digital radio