Arrangement for separating transmission and reception

Details Arrangement for separating transmission and reception Arrangement for separating transmission and reception

H - Electricity

04

B

H04B 1/48 (2006.01) H01P 1/15 (2006.01) H01P 1/205 (2006.01) H04B 1/52 (2006.01)

Patent

CA 2142052

The present invention relates to an arrangement for separating transmission and 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 a common port to be coupled to the antenna (A), a transmitter branch (TX) port (T) to be coupled to the transmitter of the transceiver and a receiver branch port (RX) port (R) to be coupled to the receiver of the transceiver, and in which, as a response to a control signal, the switching element couples operationally to the common port alternatively the transmitter branch port (T) and the receiver branch port (R). The arrangement comprises a filter (ST,SF,S1,S2) including transmission line resonators, said filter being provided with adaptation couplings to be coupled to the transmission line resonators and for accomplishing couplings between the transmission line resonators. The adaptation couplings comprise an impedance adaptation circuit composed of discrete components for adapting the filter to the antenna. The switching element (K,KT,KF) includes parts of the adaptation couplings of the filter, whereby the switching element is connected to the filter utilizing the adaptation couplings thereof and said impedance adaptation circuit is arranged in the switching element to serve as a phase shifter.

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