The DTCH4003 from Teledyne Microwave Solutions is a RF Detector with Frequency 0.01 to 4.5 GHz, Max Input Power -10 to 20 dBm, Dynamic Range -10 to 20 dBm, Frequency Flatness ±0.5 to 0.6 dB, Supply Voltage 18 V. Tags: Drop In, Threshold Detector. More details for DTCH4003 can be seen below.