US 2004/0061567 A1Published application

Method for tuning a radio filter, a radio filter and a system comprising such a radio filter

AssigneeAllgon AB

InventorsThomas Mattsson, Anders Jansson

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Abstract

The present invention relates to a method for tuning a radio filter. The filter comprises an input connection, an output connection and at least two resonator modules coupled in cascade, each having a running mechanism and a probe. A first resonator module is connected to the input connection and a final resonator module is connected to the output connection. The filter is adapted to receive at least one signal within a frequency range. The method comprises essentially two steps: coarse tuning, which is dependent on the frequency content of the received signal(s), and fine tuning, which is dependent on a calculated deviation between a set value vector and a measured signal parameter vector. A relationship between the set value vector and the signal parameter vector is established for calculating the deviation. The invention also relates to a radio filter and a system comprising such a radio filter.

Claims26

Dependent claims

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 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
establishing a signal parameter vector comprising said signal parameters being measured at the respective resonator modules,
establishing a set value vector comprising a set value for said signal parameter at each resonator tunable module,
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.

5 more elements

A radio filter being operable in a frequency range 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 being within said frequency range,
characterized in that
at least two of said resonator modules are 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 final resonator module, and
said filter further comprises a control unit which is connected to said probe, to a device, which is adapted to determine the frequency content of said received at least one signal, and to said tuning mechanisms, which are automatically adjusted to a tuning value by control signals which depends on the sensed frequency content and the measured signal parameter at the final resonator module.

4 more elements

Dependencies are inferred from the claim text.