RF FRONT-END APPARATUS OF WIRELESS TRANSCEIVER USING RF PASSIVE ELEMENTS

摘要

PURPOSE: A front-end apparatus of an RF transceiver which uses a high frequency passive device is provided to be connected to a plurality of antennas by using a circulator and to support a dual mode or a dual band. CONSTITUTION: A second circulator (403) outputs a second transmission signal inputted to a first terminal to a second terminal. The second circulator outputs a first reception signal inputted to a second terminal to a third terminal. A passive type directionality dual pole dual switch (404) includes the circulators. The passive type directionality dual pole dual switch changes a path according to a direction of input and output. A first antenna (405) transmits the first transmission signal switched through the passive type directionality dual pole dual switch to a radio channel. A second antenna (406) transmits the switched second transmission signal through the passive type directionality dual pole dual switch. [Reference numerals] (AA) Circulator #1; (BB) Circulator #2