Transmission output control device, and radio equipment including the same

A transmission output control device comprising:

• a directional coupler for receiving and branching a part of an amplified transmission signal from an amplifier;
• a detector which detects said branched transmission signal;
• and
• a first ground electrode;
• wherein said directional coupler,said detector and said first ground electrode are integrated within a laminated body in which a plurality dielectric layers are laminated;
• said directional coupler includes a main line which receives said amplified signals and a sub which outputs said branched signal;
• said detector includes a detection diode which receives an output of said sub line, and a smoothing capacitor and a load resistor which receive an output off said detection diode and generate an output signal of said detector;
• the main line and the sub line of said directional coupler comprise strip line electrodes provided inside said laminated body;
• the smoothing capacitor of said detector comprises electrodes provided on opposite sides of one or more of said dielectric layers inside said laminated body;
• the detection diode and the load resistor of said detector are mounted on said laminated body;
• and
• said first ground electrode is provided between said strip line electrodes and the electrodes of the smoothing capacitor.