| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a dual band transmitter-receiver of a small-size at a low manufacturing cost. <P>SOLUTION: The transmitter-receiver is characterized in that a first transmission filter, a first reception filter, a second transmission filter, and a second reception filter are arranged on a mount board, first and second matching circuits and a frequency band switching circuit are incorporated to the mount board, the first and second transmission filters and first and second reception filters adopt any of SAW filters, FBAR filters or strip line filters, and the first and second matching circuits are configured withλ/4 strip lines or low pass filters. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
