Implementation of orthogonal time frequency space modulation for wireless communications
US-12177057-B2 · Dec 24, 2024 · US
Wideband electromagnetic cloaking systems
US8937579B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8937579-B2 |
| Application number | US-201213594146-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 24, 2012 |
| Priority date | Aug 25, 2008 |
| Publication date | Jan 20, 2015 |
| Grant date | Jan 20, 2015 |
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Abstract
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Arrangement of resonators in an aperiodic configurations are described, which can be used for electromagnetic cloaking of objects. The overall assembly of resonators, as structures, do not all repeat periodically and at least some of the resonators are spaced such that their phase centers are separated by more than a wavelength. The arrangements can include resonators of several different sizes and/or geometries arranged so that each size or geometry corresponds to a moderate or high “Q” response that resonates within a specific frequency range, and that arrangement within that specific grouping of akin elements is periodic in the overall structure. The relative spacing and arrangement of groupings can be defined by self similarity and origin symmetry.
First claim
Opening claim text (preview).
What is claimed is: 1. An electrical resonator system comprising: a plurality of concentric electrical resonator shells, wherein the plurality includes a first group of shells and a second group of shells, each shell including a substrate having first and second surfaces and a close-packed arrangement of electrically conductive material formed on the first surface of each shell and configured to operate at a desired passband of electromagnetic radiation, wherein for the first grou…
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- H01Q21/205Primary
Electricity · mapped topic
- H01P1/20Primary
Electricity · mapped topic
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- What does patent US8937579B2 cover?
- Arrangement of resonators in an aperiodic configurations are described, which can be used for electromagnetic cloaking of objects. The overall assembly of resonators, as structures, do not all repeat periodically and at least some of the resonators are spaced such that their phase centers are separated by more than a wavelength. The arrangements can include resonators of several different sizes…
- Who is the assignee on this patent?
- Cohen Nathan, Fractal Antenna Systems Inc
- What technology area does this patent fall under?
- Primary CPC classification H01Q21/205. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jan 20 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).