Omnidirectional periodically-spaced phased array using electrolytic fluid antennas

Patent metadata

Field	Value
Publication number	US-10050352-B1
Application number	US-201715707049-A
Country	US
Kind code	B1
Filing date	Sep 18, 2017
Priority date	Sep 18, 2017
Publication date	Aug 14, 2018
Grant date	Aug 14, 2018

Abstract

A phased array antenna comprising: a center conduit filled with electrolytic fluid; a current probe having a central hole therein, wherein the center conduit is disposed within the central hole; and two electrolytic fluid antennas positioned parallel to the center conduit and fluidically coupled to the electrolytic fluid in the center conduit so as to form a field-goal-shaped phased array antenna such that the current probe feeds the electrolytic fluid antennas through magnetic induction.

First claim

We claim:

1. A phased array antenna comprising:
a center conduit filled with electrolytic fluid;
a current probe having a central hole therein, wherein the center conduit is disposed within the central hole; and
two electrolytic fluid antennas positioned parallel to the center conduit and fluidically coupled to the electrolytic fluid in the center conduit so as to form a field-goal-shaped phased array antenna such that the current probe feeds the electrolytic fluid antennas through magnetic induction.

2. The phased array antenna of claim 1 , wherein the two electrolytic fluid monopole antennas comprise L-shaped, nonconductive tubing filled with static electrolytic fluid.

3. The phased array antenna of claim 1 , further comprising a pump configured to pump the electrolytic fluid through the center conduit and wherein uprights of the field-goal-shaped phased array antenna are composed only of free-standing streams of the electrolytic fluid.

4. The phased array antenna of claim 3 , wherein the uprights are spaced apart by approximately 0.5 wavelengths.

5. The phased array antenna of claim 1 , further comprising a plurality of electrolytic fluid monopole antennas fluidically coupled to the center conduit so as to form a concentric ring configuration.

6. A phased array antenna comprising:
a center conduit that is nonconductive, has upper and lower ends, is configured to contain an electrolytic fluid, and is disposed substantially parallel to a z-axis of an x-y-z mutually orthogonal axes coordinate system, wherein the upper end terminates in a T-shaped coupler;
a current probe comprising a core of ferromagnetic material having a central hole therein, wherein the current probe is mounted between the upper and lower ends of the center conduit such that the center conduit is disposed within the central hole; and
first and second electrolytic fluid antenna elements, wherein each electrolytic fluid antenna element comprises first and second sections, wherein the first sections are coupled to opposite ends of the T-shaped coupler and comprise electrolytic fluid conduits that are filled with electrolytic fluid and are substantially parallel to the x-axis, and wherein the second sections have lengths that are substantially parallel to the z-axis and are comprised of volumes of electrolytic fluid that are fluidically coupled to the electrolytic fluid in their respective first sections.

7. The phased array antenna of claim 6 , wherein the second sections comprise nonconductive tubing filled with static electrolytic fluid.

8. The phased array antenna of claim 6 , further comprising a pump configured to pump the electrolytic fluid through the center conduit and wherein the second sections are composed only of free-standing streams of the electrolytic fluid.

9. The phased array antenna of claim 6 , wherein the uprights are spaced apart by approximately 0.5 wavelengths.

10. A method for providing a phased array antenna comprising:
positioning a current probe having a toroidal-shaped core of ferromagnetic material around a nonconductive, electrolytic-fluid-filled center conduit that is disposed substantially parallel to a z-axis of an x-y-z mutually orthogonal axes coordinate system such that the center conduit is disposed within a central hole of the current probe's core, and such that the current probe is not in physical contact with the electrolytic fluid;
fluidically coupling two columns of electrolytic fluid to the electrolytic fluid in the center conduit, wherein the two columns of electrolytic fluid are substantially parallel to the z-axis and spaced apart from each other in the x-y plane by 0.5 wavelengths;
connecting the current probe to a transceiver; and
feeding the columns of electrolytic fluid with the current probe via magnetic induction to create a phased array antenna.

11. The method of claim 10 , further comprising containing the two columns of electrolytic fluid in nonconductive tubing.

12. The method of claim 10 , further comprising the step of pumping the electrolytic fluid through the center conduit and out nozzles such that the two columns of electrolytic fluid are composed only of free-standing streams of the electrolytic fluid.

13. The method of claim 10 , further comprising fluidically coupling a plurality of columns of electrolytic fluid to the electrolytic fluid in the center conduit, wherein the plurality of columns of electrolytic fluid are substantially parallel to the z-axis and spaced apart from each other in the x-y plane by 0.5 wavelengths.

14. The method of claim 13 , further comprising positioning the plurality of columns of electrolytic fluid in a concentric ring configuration about the center conduit.

15. The method of claim 10 further comprising the step of varying the columns' heights in real time to vary a frequency of operation of the phased array antenna.

16. The method of claim 10 further comprising the step of varying the columns' width in real time to vary a bandwidth of the phased array antenna.

17. The method of claim 10 further comprising the step of generating multiple simultaneous beams by means of digital-beam-forming.

18. The method of claim 12 , wherein the electrolytic fluid is seawater.

Assignees

• Spawar Systems Ct Pacific
• Us Navy

Inventors

• Flores-Molina Carlos
• Buchanan Kristopher R
• Adeyemi Timi

Classifications

• H01Q21/0087

  Apparatus or processes specially adapted for manufacturing antenna arrays (manufacturing waveguides H01P11/00) · CPC title

• H01Q1/286

  substantially flush mounted with the skin of the craft · CPC title

• H01Q1/364

  using a particular conducting material, e.g. superconductor · CPC title

• H01Q3/2623

  composed of two antennas · CPC title

• H01Q9/22

  Rigid rod or equivalent tubular element or elements · CPC title