Directional coupler in the frequency of the radio communication unit, a process for controlling directional coupler of radio frequency.Process for controlling circuit of energy level and the control process of the communication unit.

摘要

An apparatus and process to vary the coupling of the signal to a radio frequency (RF) (408).This is used advantageously to increase the dynamic range of a power detector (406) in a loop level control automatic power (403) of a transmission unit (404) as a man.The efficiency of the transmission unit in energy levels higher.This is achieved by selecting between a first mode of operation of the RF coupler (405) having coupling, strong, responsive to a first energy level predetermined.So that the RF coupler (405) produces a first signal RF coupled (509) responsive to the RF signal (408) and a second mode of operation of the RF coupler (405) having coupling is weak.Responsive to a second energy level predeteminado, such that the RF coupler RF coupler (405) produces a second RF signal coupled (510) responsive to the RF signal (408).