Composite duplex filter

Details Composite duplex filter Composite duplex filter

H - Electricity

03

H

H03H 9/64 (2006.01) H01P 1/213 (2006.01) H03H 9/02 (2006.01) H03H 9/54 (2006.01)

Patent

CA 2097944

A miniaturized portable telephone is provided in which a receiving radio-frequency filter is formed by a SAW filter, while a transmitting radio-frequency filter is formed by a dielectric filter and they are mounted on a substrate. The transmitting and receiving sides are connected to an antenna by transmission lines, the length of which is set to have a high impedance in the mutual transmitting and receiving frequency.

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