TRANSMITTER-RECEIVER AND ELECTRONIC APPARATUS USING SAME

摘要

PROBLEM TO BE SOLVED: To provide a transmitter-receiver with a broad band for achieving high quality reception. SOLUTION: The transmitter-receiver 8 in order to solve the task above includes: a transmission antenna 10 for transmitting a signal with a first frequency band; a first reception antenna 11 for receiving a signal with a second frequency band lower than the first frequency band; a filter circuit 12 for passing the signal with the second frequency band from the first reception antenna 11 and attenuating the signal with the first frequency band; a transistor 13 for amplifying the signal from the filter circuit 12; a second reception antenna 14 for receiving a signal with a third frequency band higher than the second frequency band and adjacent to a lower frequency of the first frequency band; and a switch circuit 15 for switching between the signal from the transistor 13 and the signal from the second reception antenna 14 and outputting the switched signal to a reception circuit 16. COPYRIGHT: (C)2007,JPO&INPIT