Antenna devices to suppress ground plane interference

Patent metadata

Field	Value
Publication number	US-10840593-B1
Application number	US-202016782740-A
Country	US
Kind code	B1
Filing date	Feb 5, 2020
Priority date	Feb 5, 2020
Publication date	Nov 17, 2020
Grant date	Nov 17, 2020

Abstract

Antenna devices that include a frequency selective surface (FSS) resistive card (R-card) to suppress ground plane interference are provided. The antenna device can include a tightly coupled dipole array (TCDA), and the FSS R-card can be a saw-tooth ring that only attenuates the intended frequencies. The antenna device can be an extremely wideband phased array with integrated feeding network and spatial scanning down to 60°.

First claim

What is claimed is:

1. An antenna device, comprising:
a ground plane;
a substrate disposed on the ground plane;
a plurality of antenna elements disposed on the substrate; and
a frequency selective surface (FSS) resistive card (R-card) disposed between the ground plane and the plurality of antenna elements,
the FSS R-card being a ring FSS R-card comprising a grid of square rings with a plurality of teeth and a plurality of air gaps within the grid, the plurality of teeth and the plurality of air gaps being configured such that the FSS R-card attenuates periodic frequencies that correspond to cyclical ground plane short circuits.

2. The antenna device according to claim 1 , the FSS R-card being disposed in the substrate.

3. The antenna device according to claim 1 , further comprising a balun electrically connected to the plurality of antenna elements.

4. The antenna device according to claim 3 , the balun being a tapered stripline balun comprising an exponentially tapered stripline feed.

5. The antenna device according to claim 1 , the plurality of antenna elements being a tightly coupled dipole array (TCDA).

6. The antenna device according to claim 1 , each element of the TCDA having a width equal to λ high /2, where λ high is a wavelength at a highest frequency of operation of the antenna device.

7. The antenna device according to claim 1 , a diagonal length of each square ring being equal to λ high /2, where λ high is a wavelength at a highest frequency of operation of the antenna device.

8. The antenna device according to claim 1 , the FSS R-card being disposed horizontally such that the FSS R-card comprises an upper surface and a lower surface that are both parallel to an upper surface of the ground plane.

9. The antenna device according to claim 1 , a distance between the ground plane and a top portion of the plurality of antenna elements being equal to λ low /13.5, where λ low is a wavelength at a lowest frequency of operation of the antenna device.

10. The antenna device according to claim 1 , the plurality of antenna elements comprising capacitive overlaps between adjacent antenna elements.

11. The antenna device according to claim 1 , comprising exactly one FSS R-card.

12. An antenna device, comprising:
a ground plane;
a substrate disposed on the ground plane;
a tightly coupled dipole array (TCDA) comprising a plurality of antenna elements disposed on the substrate;
a frequency selective surface (FSS) resistive card (R-card) disposed between the ground plane and the plurality of antenna elements; and
a balun electrically connected to the plurality of antenna elements,
the balun being a tapered stripline balun comprising an exponentially tapered stripline feed, and
the FSS R-card being a ring FSS R-card comprising a grid of square rings with a plurality of teeth and a plurality of air gaps within the grid, the plurality of teeth and the plurality of air gaps being configured such that the FSS R-card attenuates periodic frequencies that correspond to cyclical ground plane short circuits.

13. The antenna device according to claim 12 , the FSS R-card being disposed in the substrate.

14. The antenna device according to claim 12 , each element of the TCDA having a width equal to λ high /2, where λ high is a wavelength at a highest frequency of operation of the antenna device.

15. The antenna device according to claim 12 , the FSS R-card being disposed horizontally such that the FSS R-card comprises an upper surface and a lower surface that are both parallel to an upper surface of the ground plane.

16. The antenna device according to claim 12 , a distance between the ground plane and a top portion of the plurality of antenna elements being equal to λ low /13.5, where λ low is a wavelength at a lowest frequency of operation of the antenna device.

17. The antenna device according to claim 12 , the plurality of antenna elements comprising capacitive overlaps between adjacent antenna elements.

18. The antenna device according to claim 12 , comprising exactly one FSS R-card.

19. An antenna device, comprising:
a ground plane;
a substrate disposed on the ground plane;
a plurality of antenna elements disposed on the substrate;
a frequency selective surface (FSS) resistive card (R-card) disposed between the ground plane and the plurality of antenna elements; and
a balun electrically connected to the plurality of antenna elements,
the FSS R-card being a ring FSS R-card comprising a grid of square rings with a plurality of teeth and a plurality of air gaps within the grid, the plurality of teeth and the plurality of air gaps being configured such that the FSS R-card attenuates periodic frequencies that correspond to cyclical ground plane short circuits,
the FSS R-card being disposed in the substrate,
the balun being a tapered stripline balun comprising an exponentially tapered stripline feed,
the plurality of antenna elements being a tightly coupled dipole array (TCDA),
each element of the TCDA having a width equal to λ high /2, where λ high is a wavelength at a highest frequency of operation of the antenna device,
a diagonal length of each square ring being equal to λ high /2,
the FSS R-card being disposed horizontally such that the FSS R-card comprises an upper surface and a lower surface that are both parallel to an upper surface of the ground plane,
a distance between the ground plane and a top portion of the plurality of antenna elements being equal to λ low /13.5, where λ low is a wavelength at a lowest frequency of operation of the antenna device,
the plurality of antenna elements comprising capacitive overlaps between adjacent antenna elements, and
the antenna device comprising exactly one FSS R-card.

Assignees

• Johnson Alexander
• Zhong Jingni
• Alwan Elias
• Volakis John L
• The Florida International Univ Board Of Trustees

Inventors

• Johnson Alexander
• Zhong Jingni
• Alwan Elias
• Volakis John L

Classifications

• H01Q21/062

  using dipole aerials; (H01Q21/067, H01Q21/068 take precedence) · CPC title

• H01Q21/0075

  Stripline fed arrays (H01Q21/065 takes precedence) · CPC title

• H01Q15/0013

  said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective · CPC title

• H01Q5/25

  Ultra-wideband [UWB] systems, e.g. multiple resonance systems; Pulse systems · CPC title

• H01Q1/523 Primary

  between antennas of an array · CPC title