Nxp B.v.

Vincent Rambeau

Frederic Mercier

Jan Van Sinderen

Luca Lococo

Johannes H A Brekelmans

Jean-Marc Paris

Luca Lo Coco

Marc G M Notten

A radio frequency filter () comprises an input impedance adaption section () and a tank capacitor section (). Thereby, the capacity of the input impedance adaption section () does not comprise a fixed capacitor, it only comprises switchable capacitors. Further, the tank capacitor section () does not comprise a fixed capacitor as well it only comprises switchable capacitors. The capacity of the input impedance adaption section () can be tuned independent of the tank capacity, section capacity by means of switchable capacitors. Hence, bandwidth and frequency of the radio frequency filter can be modified independent of each other. The imput impendance adaption section () is connected in series between the input and output of the filter (). The tank capacitor section () is shunt connected between the input-output series path of the filter () and ground. Optionally a gain/attenuation adaption section () is in series connected with the imput impedance adaption section () in the input-output path of the filter ().

Radio frequency filter

The present invention relates to a tilt correction method and a corresponding apparatus for correcting tilt of RF signals in a wanted channel having a predetermined frequency range, in a signal path of a communication equipment, wherein the RF signals are down-converted to an intermediate frequency of an IF domain. The method comprises the steps of: providing a predetermined RF signal having a particular frequency to the signal path, detecting an output signal in the intermediate frequency (IF) domain and outputting a detection result, repeating the providing step and the detecting step for plural RF signals of different frequencies within the channel frequency range, determining the tilt of the RF signals in the frequency range by comparing the detection results, and correcting the tilt to obtain a minimized tilt of the wanted channel depending upon the determined tilt. The present invention further refers to a computer program including program code means to carry out the method, and to an integrated circuit wherein the apparatus is implemented.

Reduction method and apparatus

An antenna assembly for wireless communication equipment comprises an antenna structure comprising at least a loop type antenna arranged to deliver a first current when it is used in a balanced mode and/or a second current when it is used in an unbalanced mode with respect to a ground plane from received radio signals, and current extraction device coupled to the antenna structure and arranged to be placed in at least a first state in which the current extraction device delivers the first or second current and a second state in which the current extraction device simultaneously delivers the first and second currents either separately or mixed together.

Diversity antenna assembly for wireless communication equipment

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Cormelles le Royal, France

Vincent Rambeau