Lens antenna system

• US 10,116,051 B2
• Filed: 10/02/2017
• Issued: 10/30/2018
• Est. Priority Date: 03/17/2017
• Status: Active Grant

• Current Assignee: All.Space Networks Ltd.
• Original Assignee: Isotropic Systems Ltd.
• Inventors: Scarborough, Clinton P., Turpin, Jeremiah P., DiFonzo, Daniel F., Finney, John
• Primary Examiner(s): Smith, Graham
• Application Number:
  US15/722,561
• Publication Number:
  US 20180269576A1
• Time in Patent Office: 393 Days
• CPC Class Codes: H01Q 1/241 used in mobile communications, e.g. GSM H01Q1/247, H01Q1/248 take precedence
• CPC Class Codes: H01Q 1/288 Satellite antennas
• CPC Class Codes: H01Q 19/062 for focusing
• CPC Class Codes: H01Q 21/0025 Modular arrays
• CPC Class Codes: H01Q 21/061 Two dimensional planar arrays
• CPC Class Codes: H01Q 21/22 Antenna units of the array energised non-uniformly in amplitude or phase, e.g. tapered array or binomial array
• CPC Class Codes: H01Q 25/007 using two or more primary active elements in the focal region of a focusing device for operation on different wavebands H01Q5/22
• CPC Class Codes: H01Q 3/14 for varying the relative position of primary active element and a refracting or diffracting device
• CPC Class Codes: H01Q 3/245 in the focal plane of a focussing device
• CPC Class Codes: H01Q 3/30 varying the relative phase between the radiating elements of an array H01Q3/2605, H01Q3/2658, H01Q3/2682, H01Q3/44 take precedence
• CPC Class Codes: H01Q 3/46 Active lenses or reflecting arrays

Abstract

An antenna system that includes a plurality of lens sets. Each lens set includes a lens and at least one feed element. At least one feed element is aligned with the lens and configured to direct a signal through the lens at a desired direction.

Claims

1. An antenna system comprising:

a plurality of lens sets forming a phased array, each lens set including;

a substantially flat lens capable of wide-angle beam steering with a substantially planar surface;

a plurality of discrete feed elements associated and linearly aligned with the substantially planar surface of said lens, each of said plurality of discrete feed elements at one of a plurality of fixed positions separated from said lens to direct a signal through said substantially flat lens at one of a plurality of desired directions; and

a selector connected to each of said plurality of discrete feed elements to select only a subset of said plurality of discrete feed elements to direct the signal through said substantially flat lens at said one of the plurality of desired directions.

2. The antenna system of claim 1, wherein the lens aperture sizes are generally greater than one wavelength.

3. The antenna system of claim 1, wherein each of the plurality of lens sets have directive radiation patterns.

4. The antenna system of claim 1, where the plurality of lens sets are interconnected in an x-direction and a y-direction along the substantially planar surface of said substantially flat lens to form the phased array.

5. The antenna system of claim 1, further comprising lens set circuitry and/or processing device(s) to adjust embedded radiation patterns of each of the plurality of lens sets.

6. The antenna system of claim 5, wherein the lens set circuitry and/or processing device(s) directs the signal of one or more of the embedded radiation patterns of the lens set using electrical, mechanical, or electro-mechanical methods.

7. The antenna system of claim 1, wherein the plurality of lens sets includes a dielectric lens, a metamaterial lens, a metasurface lens, or a combination thereof.

8. The antenna system of claim 7, wherein the lenses are homogeneous.

9. The antenna system of claim 7, wherein the lenses are inhomogeneous for improved overall performance over a homogeneous lens.

10. The antenna system of claim 1, where the lens sets are not identical in geometry, dielectric profiles, or a combination thereof.

11. The antenna system of claim 1, wherein the plurality of lens sets are placed in a nonuniform tiling configuration.

12. The antenna system of claim 11, wherein the tiling configuration of the plurality of lens elements improves the antenna radiation pattern over a wide field of regard and/or frequency range.

13. The antenna system of claim 12, further comprising an antenna circuit and/or processing device(s) configured to adjust an antenna radiation pattern.

14. The antenna system of claim 1, wherein the plurality of lens set circuit and/or processing device(s) and antenna circuit and/or processing device(s) are configured to process signals at radio frequency (RF), intermediate frequency (IF), or baseband frequency.

15. The antenna system of claim 13, where the antenna circuit and/or processing device(s) includes one or more phase or time shifters connected with said plurality of lens sets to form an analog beamforming system via phase shifting or time-delaying signals communicated with said plurality of lens sets.

16. The antenna system of claim 13, where the antenna circuit and/or processing device(s) includes digital signal processor(s) jointly configured as a digital beamforming system by sampling, analog-to-digital conversion, and digital-to-analog conversion.

17. The antenna system of claim 1, wherein the antenna system is receive-only, transmit-only, or combined receive-transmit.

18. The antenna system of claim 1, wherein the antenna system communicates with a satellite system.

19. The antenna system of claim 1, wherein the antenna system conducts electronic beamforming on a spacecraft system for space-ground or space-space communications.

20. The antenna system of claim 1, wherein the antenna system provides satellite connectivity on cars and other ground vehicles, or on marine vehicles, or on manned or unmanned aircraft.

21. The antenna system of claim 1, wherein the antenna system is used for fixed or dynamically reconfigurable, single- or multi-beam point-point terrestrial microwave links.

22. The antenna system of claim 1, wherein the antenna system is used for cellular telecom applications, such as 5G and future evolutions.

23. The antenna system of claim 1, where the antenna system produces multiple simultaneous beams in various directions.

24. The antenna system of claim 23, wherein the antenna circuitry further comprises beamforming circuitry including:

one or more selectors, one or more phase or time delay units, one or more summation/divider circuits, or a combination thereof, wherein the beamforming circuitry is duplicated such that the antenna system supports multiple simultaneous beams.

25. The antenna system of claim 1 where the lens sets, associated circuitry, and packaging include all components necessary to form a complete communications terminal, including housing, power supply, software, computing &

control hardware, modem interface, and other mechanical and electrical interfaces.

26. An antenna system comprising:

a plurality of lens sets forming a phased array, where the lens sets are shaped, closely tiled, and immediately adjacent to one another to form a substantially contiguous array, each lens set comprising;

a substantially flat lens with a substantially planar surface;

one or more discrete feed elements associated with and aligned to a plane substantially parallel to and separated from the substantially planar surface of said lens; and

a feed support structure having one or more positioning devices associated with the one or more discrete feed elements to position the discrete feed elements in a specified location within the plane substantially parallel to and separated from the said lens to direct a beam in a desired location.

27. The antenna system of claim 26, wherein each of the plurality of lens sets have directive radiation patterns.

28. The antenna system of claim 26, where the plurality of lens sets are interconnected in an x-direction and a y-direction along the substantially planar surface of said substantially flat lens to form the phased array.