Saw filter having ground terminals separated
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United States of America Patent
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Jun 13, 2017
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app pub date -
Sep 24, 2015
filing date -
Sep 26, 2014
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Abstract
A SAW filter in which a plurality of IDT electrodes is disposed in the propagation direction of a SAW and ground terminals are separated. The present invention has an advantage in that the attenuation effect of the SAW filter is improved. Furthermore, a skirt characteristic on the high frequency side of a transmission stage and a skirt characteristic on the low frequency side of a reception stage can be improved. Furthermore, an equivalent pass band characteristic can be achieved and a skirt characteristic on the high frequency side and a skirt characteristic on the low frequency side can be improved. Furthermore, the number of bridge electrodes can be reduced and thus a process can be simplified because ground terminals are separated.
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