| 摘要 |
The present invention relates to a transceiver device having a switching arrangement and to a method of improving such a switching arrangement, wherein an input impedance of a duplexer means, as seen by a switching means ( 10 ) at a predetermined frequency, is transformed to a predetermined maximum or a minimum value. The switching means is used to selectively connect an antenna port to a transmitting and receiving path which leads to the duplexer means ( 14 ). The transformation of the input impedance can be achieved by providing a phase shifter ( 20 ) between a switching means ( 10 ) and the duplexer means ( 14 ). Thereby, the phase of the impedance can be optimized for minimal intermodulation distortion and to relax switch linearity requirements, so that the switching means ( 10 ) can be used for switching duplex signals.
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