Patent ID: 6987427
Filing Date: 2006-01-17
Classification: H03J

Abstract:
1. A method for tuning a radio filter, said filter being operable in a frequency range and comprising an input connection, an output connection and at least two resonator modules, each of said at least two resonator modules having a tuning mechanism, said filter being adapted to receive at least one signal, having a frequency content, being within said frequency range, characterized in that the method is performed with a radio filter having at least two of said resonator modules coupled in cascade, whereof a first resonator module being connected to said input connection and a final resonator module being connected to said output connection, at least said final resonator module having a probe for measuring a signal parameter at the resonator module, said method comprising the steps of: determining a filter frequency parameter which corresponds to the frequency content of said received at least one signal, coarse tuning each resonator module by adjusting each tuning mechanism to a tuning value, which depends on said filter frequency parameter, fine tuning said filter by defining a relationship between said set value vector and said signal parameter vector, calculating a deviation between the set value vector and the measured signal parameter vector by using the defined relationship, and adjusting the tuning mechanism in response to the result of the calculation.