Device for use in on-board control equipment unit for combining wireless local area network signals to provide e.g. wireless local area network services for users within passenger cabin of aircraft, has coupler delivering signal spectrums

摘要

The device (1) has separate band pass filter groups (2, 3) provided with frequency-added band pass filters, where each filter is connected with an input of a directional coupler (4) e.g. hybrid combination circuit, prolonged coupler and Wilkinson coupler. The coupler delivers combined signal spectrums of filtered radio frequency signals from the band pass filter groups to a common transmitting- and receiving antenna (5) i.e. leakage line antenna. A measuring unit (11) measures and monitors signal power of the radio frequency signals at an end of the antenna. An independent claim is also included for a method for combining radio frequency signals.