| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a branching filter capable of reducing a parasitic capacitance between filters without incurring extension of the mount area and a complicated structure. <P>SOLUTION: The electronic apparatus includes: a mount board 11; a transmitter side filter BF1 mounted on the mount board 11; and a receiver side filter BF2 mounted on the same plane as the transmitter side filter BF1 on the mount board 11, wherein the transmitter side filter BF1 and the receiver side filter BF2 are located so that a perpendicular line L1 passing through the center of a side of the transmitter side filter BF1 opposed to the receiver side filter BF2 and in parallel with the mount face and a perpendicular line L2 passing through the center of a side of the receiver side filter BF2 opposed to the transmitter side filter BF1 and in parallel with the mount face are not on the same straight line. The transmitter side filter BF1 and the receiver side filter BF2 are provided with a surface acoustic wave resonator formed on a piezoelectric substrate and have mutually different pass bands to configure the branching filter. <P>COPYRIGHT: (C)2004,JPO&NCIPI</p> |
