The CST 2520 from Microphase Corporation is a RF Detector with Bias Current 100 µA, Frequency 0.5 to 2 GHz, Max Input Power 20 dBm, Frequency Flatness ±0.2 to ±0.3 dB, Voltage Sensitivity 2500 to 2600 mV/mW. Tags: Connectorized, Diode Detector. More details for CST 2520 can be seen below.