MULTIPLEXER AND COMMUNICATION DEVICE

Japanese Patent JP3765405

B2

PROBLEM TO BE SOLVED: To provide a surface-mountable multiplexer in which a dielectric duplexer and one filter are integrated. SOLUTION: A dielectric block 1 is formed into rectangular parallelopiped partially provided with a recess and inside the block, inner conductor forming holes 2a-2f in a step structure equipped with inner conductors 3a-3f and inner conductor non-formed parts 4a-4f are formed to configure a resonator and on the outer surface of the block, an outer conductor 5 approximately over all the surface, input/output electrodes 6a and 6b from a mounting face to a lateral side and a common electrode 7 conducted to an exciting hole 8 are formed to configure a dielectric duplexer 101. A third filter 102 is composed of a SAW filter provided with input/output electrodes 9a and 9b on its outer surface. Then, the third filter 102 is fitted into the recess on the dielectric duplexer 101 and integrated and the common electrode 7 of the dielectric duplexer 101 and one input/output electrode 9a of the third filter 102 are bonded.