RF Power Calibration Improves Performance Of Wireless Transmitters

By Eamon Nash, ADI

Measurement and control of radio frequency (RF) power is a critical consideration when designing a wireless transmitter. High power RF power amplifiers (PAs) rarely operate in open-loop mode (that is, when the power to the antenna is not in some way monitored). External factors such as regulatory requirements on the amount of power transmitted, network robustness, and the need to co-exist with other wireless networks require strong control of transmitted power. In addition to these external requirements, precise RF power control may result in improved spectral performance and may make the power amplifier of the transmitter more energy and cost efficient. To learn more, download the full application note.