Minature monolithic power detectors with integrated high directivity couplers

Modern backhaul digital radios require sophisticated output power control to handle 4G phone data load. This paper describes a family of monolithic power detectors with integrated directional couplers, featuring low insertion loss, high directivity and temperature compensation. Four detectors cover the 2-50 GHz frequency range. Each detector is a single chip housed in a 1.2 × 1.5 mm surface mount PQFN package. These detectors provide over 45 dB of dynamic range, yet typically have less than 0.5 dB insertion loss and 20 db of directivity.