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US 2023/0361745 A1Published application
Multi-tune filter and control therefor
AssigneeNetcom, Inc.
InventorsKenneth Allen COLBERT, Vasileios LIAROPOULOS
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Abstract
A multi-tune filter system and a control system for operating the multi-tune filter system are described herein. The multi-tune filter system is a tunable frequency range filter. Further, the multi-tune filter system is a digitally programmable filter with an adjustable passband between first and second customizable frequency bounds f1, f2.
Claims20
A multi-tune filter system, the filter system having a frequency range filter having a filter topology comprising:
- a first frequency and a second frequency, where the first frequency is lower than the second frequency;
- and
- a third frequency which is greater than the first frequency and lesser than the second frequency,
- wherein each of the first frequency and the second frequency are selected from the range consisting of 1.5 MHz to 30 Mhz, and
- wherein the third frequency is equal to one half the sum of the first frequency and the second frequency, and
- at least one elliptic Cauer-Chebyshev topology implemented with a minimum of two capacitors.
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A method of controlling a multi-tune filter, comprising:
- selecting a center frequency;
- setting first and second frequency values equidistant from the center frequency, manipulating a plurality of impedance transformers and a plurality of radio frequency switches, wherein manipulation of the plurality of impedance transformers and plurality of radio frequency switches adjust the first and second frequency values.
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A multi-tune filter control system, comprising:
- a first frequency limit at 1.5 MHz and a second frequency limit at 30 MHz;
- a first frequency and a second frequency, each of the first and second frequencies being selected within a frequency range defined by the first and second frequency limits;
- a center frequency between the first and second frequencies;
- an adjustable passband filter implemented between the first and second frequencies;
- wherein the first and second frequencies are adjustable through manipulation of the plurality of impedance transformers and plurality of radio frequency switches, and the filter control system further manipulates at least one elliptic Cauer-Chebyshev topology implemented with a minimum of two capacitors.
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Dependencies are inferred from the claim text.