Switchable frequency filter
First Claim
Patent Images
1. A changeover filter for filtering out a variable frequency band from a signal which is guided via an electrical main line from an input to an output of the filter, the changeover filter comprising:
- a first line segment, which leads away from the main line, and at least one second line segment which can be electrically connected to the first line segment; and
at least two electronically controllable switching elements, by which the first and the at least one second line segment can be connected,wherein at least one line segment provides a radial stub with a narrow end and a wide end,wherein a plurality of second line segments can be connected separately to the first line segment, in each case via at least one switching element, andwherein a topology of the changeover filter is point-symmetrical about a point on the main line.
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Abstract
The invention relates to a filter, for example, a switchable harmonic filter for the gigahertz range. A first line segment, which can comprise a radial stub leads away from a main line of the filter. A second line segment can be electrically connected to the first line segment. At least two electronically controllable switching elements are provided, by means of which the first and the second line segment can be connected.
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Citations
13 Claims
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1. A changeover filter for filtering out a variable frequency band from a signal which is guided via an electrical main line from an input to an output of the filter, the changeover filter comprising:
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a first line segment, which leads away from the main line, and at least one second line segment which can be electrically connected to the first line segment; and at least two electronically controllable switching elements, by which the first and the at least one second line segment can be connected, wherein at least one line segment provides a radial stub with a narrow end and a wide end, wherein a plurality of second line segments can be connected separately to the first line segment, in each case via at least one switching element, and wherein a topology of the changeover filter is point-symmetrical about a point on the main line. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A changeover filter for filtering out a frequency band from a signal which is guided via an electrical main line from an input to an output of the filter, the changeover filter comprising:
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a radial stub which leads away from the main line and a line segment which can be electrically connected to the radial stub, wherein the radial stub has a narrow end and a wide end; and at least one electronically controllable switching element, by which the radial stub and the line segment can be connected, wherein a plurality of line segments are connectable separately to the radial stub, in each case via at least one switching element, and wherein a topology of the changeover filter is point-symmetrical about a point on the main line.
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Specification