MULTI-BAND ANTENNA SWITCH MODULE CIRCUIT

摘要

PURPOSE: A multi-band antenna switch module circuit is provided to easily divide GSM(Global System for Mobile communication) transmitting and receiving signals, DCS(Digital Communication System) transmitting and receiving signals and PCS(Personal Communication System) transmitting and receiving signals. CONSTITUTION: A diplexer circuit unit(300) has a BPF(Band Pass Filter) and a HPF(High Passer Filter). The BPF passes a GSM signal with a 900MHz band. The HPF passes DCS and PCS signals with 1800MHz band or more. The BPF(320) located between the first switching unit(310) and a GSM transmission terminal(32) removes unnecessary RF(Radio Frequency) signals. The BPF(330) located between the first switching unit(310) and a DCS/PCS transmission terminal(36) removes unnecessary RF signals. A tuning circuit unit(360) located among the first switching unit(310), a GSM reception terminal(33) and a DCS reception terminal(34) in parallel adjusts the blocking characteristics of receiving signals.