Additional Information

An RF detector converts the power information of an RF input signal into a DC or low-frequency voltage output, and is used for signal strength measurement and power monitoring. Common types include diode-based rectifying peak/envelope detectors and logarithmic amplifier-based power detectors, the latter providing a linear dB response over a wide dynamic range. Selection considerations include operating frequency, dynamic range, response speed, and temperature stability. RF detectors are widely used in automatic gain control, transmitter power monitoring, and RF test instrumentation.