Wideband RF power / return loss measurement system in integrated format

October 11, 2017 // By Graham Prophet
Analog Devices’ ADL5920 detector is a 9 kHz - 7 GHz directional bridge and dual RMS RF power detector that can simultaneously measure forward and reverse RMS power levels in a signal path, along with return loss.

The detector is an alternative to conventional approaches that integrates a directional bridge-based coupler resulting in a new level of integration and bandwidth. For space-critical applications, the ADL5920 integrates the coupling or sensing function with the detection function and provides an output that can drive a precision ADC directly. For wideband operation or for frequency variants, the ADL5920 detector eliminates the need to choose a different directional coupler for each frequency. This integrated, wideband device supports smaller form factors and faster product time to market.


The detector;

- Allows for coupled power measurements down to 9 kHz

- accepts a maximum input signal of +30 dBm with handling capability for open and shorted loads

- Requires a 5V supply and draws 150 mA

- Comes in a 32-lead, 5 x 5 mm LFCSP, with an operating temperature range of -40°C to +85°C

It is priced at $14.50 (1000).


Analog Devices; · www.analog.com/ADL5920 and www.analog.com/en/products/rf-microwave/rf-power-detectors.html