PRINTED BOARD, AMPLIFYING APPARATUS, DISPENSING SYSTEM, SYNTHESIZING APPARATUS, SWITCHING APPARATUS, RECEIVING APPARATUS AND TRANSMITTING APPARATUS PROVIDED WITH FOREGOING PRINTED BOARD IN COMMUNICATION SYSTEM, MOBILE STATION APPARATUS AND BASE STATION APPARATUS PROVIDED WITH FOREGOING PRINTED BOARD IN MOBILE COMMUNICATION SYSTEM, AND WIRELESS COMMUNICATION APPARATUS PROVIDED WITH FOREGOING PRINTED BOARD

摘要

PROBLEM TO BE SOLVED: To prevent a reduction in an attenuation characteristic of SAW filter.;SOLUTION: An input side terminal electrode 12a and an output side terminal electrode 13e which are respectively connected to an input terminal and an output terminal of a SAW filter are provided in an area 11 where a SAW filter comprising langasite as a piezoelectric material is mounted. Each terminal electrode 12a and 13a is connected to micro strip lines 14 which extend in parallel with a transmission direction P of frequency signals in the SAW filer towards mutually opposite directions at a position spaced from the area 11 where the SAW filter mounted by a predetermined distance #L. The area 11 where the SAW filter is mounted is provided with a slit 15 extending in a direction crossing the transmission direction P of the frequency signals in the SAW filer. The printed board 10 is provided with a plurality of through holes 16 for bringing the surface of the printed board 10 and a grounded backside thereof into conduction.;COPYRIGHT: (C)2003,JPO