Patent ID: 6577850
Filing Date: 2003-06-10
Classification: H04B

Abstract:
A booster for a handy phone, comprising:a variable gain power amplifier for amplifying power of a transmission wave output from the handy phone to which said booster is connected; splitting means for splitting the transmission wave with amp amplified power output from said variable gain power amplifier into two; a decoder for decoding a particular transmission message included in the transmission wave split by said splitting means and determining transmission power to thereby output a reference signal matching in level with said transmission power; a detector for detecting the transmission wave with amplified power output from said variable gain power amplifier; a controller for comparing a level of said reference signal output from said decoder and a level of a detected signal output from said detector and variably controlling a gain of said variable gain power amplifier such that said reference signal and said detected signal coincide with each other; and transmitting means for transmitting the transmission wave output from said splitting means by radio.