The DD-20-218-5PF-3-P-M-OPT0518 from Quantic PMI (Planar Monolithics) is a RF Detector with Frequency 500 MHz to 18 GHz, Max Input Power 17 dBm, TSS -50 dBm, Frequency Flatness ± 1.0 dB, Voltage Sensitivity 500 mV/mW. Tags: Module with Connectors, Diode Detector. More details for DD-20-218-5PF-3-P-M-OPT0518 can be seen below.