Self-limiting filters for band-selective interferer rejection or cognitive receiver protection
| DWPI Title: Self-limiting filter in filter array, has phase transition film is configured to operate in transmissive state below threshold power and in reflective state above threshold power, such that providing self-limiting filter |
| Abstract: The present invention related to self-limiting filters, arrays of such filters, and methods thereof. In particular embodiments, the filters include a metal transition film (e.g., a VO2 film) capable of undergoing a phase transition that modifies the film's resistivity. Arrays of such filters could allow for band-selective interferer rejection, while permitting transmission of non-interferer signals. |
| Use: Self-limiting filter in filter array. |
| Advantage: The filter is provided for band-selective interferer rejection or cognitive receiver protection. The phase-change capability of the film can be employed to develop a self-limiting filter that automatically rejects an input signal above that threshold power or temperature. The film undergoes a phase change that provides a conductive film, thus shunting the interferer to ground and effectively reflecting the signal in the frequency band of the interferer. The film undergoes a phase change that restores the initial conductivity of the film, thus permitting signal transmission. The filter banks are capable of automatically rejecting interferers, yet allowing signals of interest to pass. |
| Novelty: The filter (100) has an input (110) is configured to receive an input signal. An output (120) is configured to transmit an output signal. A resonant portion (101) of the one or more resonant portions is connected to the input and the output. A phase transition film (150) connects the resonant portion to a ground connection. The phase transition film is configured to operate in a transmissive state below a threshold power and in a reflective state above the threshold power, such that providing the self-limiting filter. |
| Filed: 5/26/2015 |
| Application Number: US14721890A |
| Tech ID: SD 12562.1 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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