The CST 326 from Microphase Corporation is a RF Detector with Bias Current 100 µA, Frequency 2 to 6 GHz, Max Input Power 20 dBm, Frequency Flatness ±0.2 to ±0.3 dB, Voltage Sensitivity 2600 to 2700 mV/mW. Tags: Connectorized, Diode Detector. More details for CST 326 can be seen below.