Adjustable electronic duplexer

H - Electricity – 04 – L

Patent

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Details

H04L 5/14 (2006.01) H04B 1/48 (2006.01)

Patent

CA 2413714

A duplexer for a communication device having a transmission unit, a reception unit and a shared antenna. The duplexer comprises a first signal path between a transmitter port and a receiver port; a filter unit in the first signal path for filtering a reception signal, the filter unit causing a leakage signal to occur between the transmitter port and the receiver port; a second signal path between the transmitter port and the receiver port; and a cancellation unit in the second signal path adapted to receive a sample of a transmission signal and produce a compensation signal that is injected into the first signal path to substantially reduce the leakage signal.

Il s'agit d'un duplexeur pour appareil de communication ayant un émetteur, un récepteur et une antenne commune. Le duplexeur se présente de la manière qui suit. Il comporte un premier trajet de signal entre un point d'accès à l'émetteur et un point d'accès au récepteur; un filtre dans le premier trajet de signal pour filtrer le signal de réception, le filtre produisant un signal de fuite entre le point d'accès à l'émetteur et le point d'accès au récepteur; un second trajet de signal entre le point d'accès à l'émetteur et le point d'accès au récepteur; et un suppresseur dans le second trajet de signal, adapté pour recevoir un échantillon du signal de transmission et produire un signal de compensation, appliqué au premier trajet de signal pour réduire sensiblement le signal de fuite.

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