A transceiver with an arrangement for separating t

专利名称：A transceiver with an arrangement for

separating transmission and receptionsignals

发明人：Yrjola, Seppo,Hagstrom, Panu申请号：EP95300747.3申请日：19950207公开号：EP0667684A1公开日：19950816

专利附图：

摘要：The present invention relates to an arrangement for separating transmissionand reception accomplished through one and same antenna (A) in a transceiver, said

arrangement comprising a filter and a switching element (K) and being provided with acommon port to be coupled to the antenna (A), a transmitter branch (TX) port (T) to becoupled to the transmitter of the transceiver and a receiver branch port (RX) port (R) tobe coupled to the receiver of the transceiver, and in which, as a response to a controlsignal, the switching element couples operationally to the common port alternatively thetransmitter branch port (T) and the receiver branch port (R). The arrangement comprisesa filter (ST,SF,S₁,S₂) including transmission line resonators, said filter being provided withadaptation couplings to be coupled to the transmission line resonators and foraccomplishing couplings between the transmission line resonators. The adaptationcouplings comprise an impedance adaptation circuit composed of discrete componentsfor adapting the filter to the antenna. The switching element (K,KT,KF) includes parts ofthe adaptation couplings of the filter, whereby the switching element is connected to thefilter utilizing the adaptation couplings thereof and said impedance adaptation circuit isarranged in the switching element to serve as a phase shifter.

申请人：LK-PRODUCTS OY

地址：Takatie 6 SF-90440 Kempele FI

国籍：FI

代理机构：Frain, Timothy John

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