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AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsHiroshi Kushitani, Toru Yamada, Naoki Yuda, Toshio Ishizaki, Hideaki Nakakubo, Makoto Fujikawa
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The present matching circuit chip has an integrated shape comprising a first transmission line, a second transmission line and a third transmission line, wherein one end of the first transmission line, one end of the second transmission line and one end of the third transmission line are connected to one another, a first filter connection terminal is connected to the other end of the first transmission line, an antenna terminal is connected to the other end of the second transmission line, and a second filter connection terminal is connected to the other end of the third transmission line, whereby the second transmission line converts the characteristic impedances of the first and third transmission lines so that the impedance matching between the antenna terminal and the first filter connection terminal can be attained, and so that the impedance matching between the antenna terminal and the second filter connection terminal can be attained.
A duplexer of an integrated shape comprising a receiving terminal for connection to a receiving circuit, a transmitting terminal for connection to a transmitting circuit, an antenna terminal for connection to an antenna, a first transmission line, a second transmission line, a third transmission line, a transmission line for a transmitting filter, a plurality of capacitor elements for said transmitting filter, a plurality of capacitor elements for a receiving filter, a plurality of resonators for said transmitting filter and a plurality of resonators for said receiving filter,
A duplexer of an integrated shape comprising a receiving circuit for connection to a receiving circuit, a transmitting terminal for connection to a transmitting circuit, an antenna terminal for connection to an antenna, a first transmission line, a second transmission line, a third transmission line, a transmission line for a transmitting filter, a plurality of capacitor elements for said transmitting filter, a plurality of capacitor elements for said transmitting filter, a plurality of capacitor elements for a receiving filter, a plurality of resonators for said transmitting filter and a plurality of resonators for said receiving filter,
A duplexer of an integrated shape comprising a receiving terminal for connection to a receiving circuit, a transmitting terminal for connection to a transmitting circuit, all antenna terminal for connection to an antenna, a first transmission line, a second transmission line, a third transmission line, a transmission line for a transmitting filter, a plurality of capacitor elements for said transmitting filter, a plurality of capacitor elements for said transmitting filter, a plurality of capacitor elements for a receiving filter, a plurality of resonators for said transmitting filter and a plurality of resonators for said receiving filter,
Dependencies are inferred from the claim text.