DUPLEXING APPARATUS, WIRELESS DEVICES AND RELATED METHODS

摘要

The invention provides duplexing apparatus, wireless devices and methods for duplexing signals in which measurements are taken at multiple frequencies across a frequency band of interest, and in which a balancing impedance is controlled as a function of those measurements. Isolation between the RX and TX nodes is enhanced across the frequency band as a result.

主权项

1. An apparatus for duplexing signals to be transmitted wirelessly and signals received wirelessly by an antenna, comprising:
a hybrid junction comprising an antenna node for coupling to the antenna, an input node for receiving a signal to be transmitted by the antenna, an output node for outputting a signal received wirelessly by the antenna, and a balancing node; a variable impedance coupled to the balancing node; and a controller arranged to:
a) set the variable impedance to a predetermined impedance;b) transmit a signal at a first frequency in a first frequency band of interest;c) measure a signal at the output node at at least one second frequency in a second frequency band of interest as a result of the signal transmitted at the first frequency;d) repeat operation b) and/or operation c) for at least one other frequency in the first frequency band of interest and/or at least one other frequency in the second frequency band of interest; ande) control the variable impedance as a function of the measurements in operation c).