FRACTAL PLASMONIC SURFACE READER ANTENNAS

• US 20170061176A1
• Filed: 11/10/2016
• Published: 03/02/2017
• Est. Priority Date: 04/08/2015
• Status: Active Grant

• Current Assignee: Fractal Antenna Systems Inc.
• Original Assignee: Fractal Antenna Systems Inc.
• Inventors: COHEN, Nathan
• Granted Patent: US 9,811,700 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06K 7/10316 using at least one antenna particularly designed for interrogating the wireless record carriers antennas in general H01Q1/22
• CPC Class Codes: G06K 7/10366 the interrogation device being adapted for miscellaneous applications
• CPC Class Codes: H01Q 1/2216 used in interrogator/reader equipment

Abstract

Plasmonic-surface antenna systems are described in which resonators, or cells, are closely arranged but do not touch. At least a portion of a radiating surface includes a plurality of cells (operative as resonators) placed very close together to one so that a surface (plasmonic) wave causes near replication of the current of one cell in an adjacent cell. Cells with one or more fractal shapes may be used as a fractal plasmonic surface (FPS). Systems and/or methods are described of using plasmonic surfaces or fractal plasmonic surfaces for radiofrequency identification (RFID). A PS or FPS may act as an intermediary array of antennas, which can serve to connect an RFID reader with one or more RFID tags. Structures including cages are described that can include one or more surfaces that are each an FPS. Methods of power transfer are described.

Claims

1. A plasmonically coupled resonator system the system comprising a plurality of close packed fractal cells disposed on a supporting surface wherein each fractal cell includes a fractal shape defining an electrical resonator, and where in the plurality of fractal cells are position sufficiently close to one another to support plasmonic transfer of energy between the fractal cells, and said resonator system is configured to comprise a reader antenna for an RFID system for animal cages whereby said reader antenna both receives and transmits to an RFID chip implanted within the animal inside the cage, and attachment to the RFID reader is done only to one-edge oriented fractal cell, or at most only the edge oriented fractal cells.

2. The system of claim 1, whereby resonant lines separate rows and columns of the fractal cells thereby activating maximum RFID readability within a given row or column, and whereby said resonant lines may be turned on and off via a mechanical or electrical switching system.

3. The system of claim 1, whereby resonant conductive lines separate rows and columns of the fractal cells thereby activating maximum RFID readability within a given row or column, and whereby said resonant lines may be turned on and off via a mechanical or electrical switching system, and said switching system works separately through switching of each row and column, thereby allowing an estimate of the specific fractal cell in closest proximity to the implanted RFID chip.

4. An RFID reader coupled to the resonator system of claim 2.

5. An RFID reader coupled to the resonator system of claim 3.