APPARATUS FOR TRANSMITTING AND RECEIVING RADIO FREQUENCY USING CAR RADIO ANTENNA

摘要

PURPOSE: An apparatus for transmitting and receiving a radio frequency using a car radio antenna is provided to enable the collection of a toll in the state that a car passes along a high way with nonstop, by transmitting and receiving data related to the toll at a car entrance sensor using a car radio antenna when the car enters a toll gate. CONSTITUTION: A radio/communication switch(10) performs a switching between a radio receiver(20) and Tx/Rx switch(30). The radio receiver(20) receives radio frequencies and converts them to voice signals. The Tx/Rx switch(30) is selectively connected a power antenna(A), transmitter(40) or receiver(50). The transmitter(40) receives the toll data stored in a memory(90) and transmits it to the entrance sensor via the Tx/Rx switch(30) and radio/communication switch(10). The receiver(50) receives the toll data from the transmitter(40). A switch controller(60) controls the switching states of the radio/communication switch(10) and sends the switching results thereof to a display unit(100). A Tx/Rx controller(70) controls the switching states of the Tx/Rx switch(30).