Method for transforming bandpass filters to facilitate their production and resulting devices
First Claim
1. Process for optimisation of the elements of a narrow or intermediate pass band filter for which the LC prototype has been determined, characterised by the fact that it includes the following steps:
- i) decompose resonators with X elements into several parallel or series capacitances ii) insert pairs of transformers between the first separate element and the rest of the resonator, iii) displace transformers to modify resonator impedance levels, and iv) absorb residual transformers by transformation.
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Abstract
The invention concerns a method for optimizing elements of a narrow or intermediate band bandpass filter whereof the LC prototype has been determined. The invention is characterized in that it comprises steps which consist in: (i) breaking down several parallel or series capacitors of resonators with X elements, (ii) inserting pairs of transformers between the first and second separated element and the rest of the resonator, (iii) displacing the residual transformers to modify the impedance levels of the resonators, and (iv) absorbing the residual transformers by transformation. The invention also concerns the resulting filters.
17 Citations
44 Claims
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1. Process for optimisation of the elements of a narrow or intermediate pass band filter for which the LC prototype has been determined, characterised by the fact that it includes the following steps:
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i) decompose resonators with X elements into several parallel or series capacitances ii) insert pairs of transformers between the first separate element and the rest of the resonator, iii) displace transformers to modify resonator impedance levels, and iv) absorb residual transformers by transformation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41)
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42. Pass band filter obtained by using a process which includes the following steps:
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i) decomposing resonators with X elements into several parallel or series capacitances, ii) inserting pairs of transformers between the first separate element and the rest of the resonator, iii) displacing transformers to modify resonator impedance levels, and iv) absorbing residual transformers by transformation. - View Dependent Claims (43, 44)
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Specification