IN-BUILDING FREQUENCY CONVERSION REPEATER FOR USING INDUSTRIAL, SCIENTIFIC AND MEDICAL FREQUENCY BAND AS LINK FREQUENCY

摘要

PURPOSE: An in-building frequency conversion repeater for using an ISM(Industrial, Scientific and Medical) frequency band as a link frequency is provided to offer radio communication services to the inside of a building by simply installing main and sub frequency conversion repeaters. CONSTITUTION: A charging cradle(311), at which a terminal(331) is installed, consists of a sub frequency conversion and amplification unit(322) and a charger(324). The sub frequency conversion and amplification unit(322) converts and amplifies a signal supplied from an antenna(321). The amplified signal is transmitted to a terminal antenna(332) through a coupler(323) by wireless. In addition, the charging cradle comprises a speaker or an audio output block(323).