| 摘要 |
PROBLEM TO BE SOLVED: To provide a dielectric transmitter-receiver that prevents reduction in mechanical strength, prevents characteristic variation, and which is easily surface-mounted even when the number of resonators is increased. SOLUTION: A surface 22 of a dielectric block 2 of a transmission filter and a surface 42 of a dielectric block 4 of a reception filter are bonded together with external conductors 32, 52 interposed therebetween so that surfaces 23 and 43 face the same direction. With respect to the transmission filter, an input/output electrode 34 has an input/output terminal portion for transmission circuit connection that is fitted to the surface 23 while being insulated from the external conductor 32, an input/output electrode 35 has a connection portion 35a extended to a peripheral edge of the surface 22 while being insulated from the external conductor 32, and the connection portion 35a forms a common terminal portion insulated from the external conductor 32 on the surface 23. The same applies to the reception filter. Common terminal portions of the transmission filter and reception filter form a common terminal for antenna connection, which is disposed adjacent to peripheral edges of the surfaces 22 and 42. COPYRIGHT: (C)2011,JPO&INPIT
|
