Method for beam steering an omnidirectional periodically-spaced phased array of electrolytic fluid antennas

Patent metadata

Field	Value
Publication number	US-10074908-B1
Application number	US-201815902346-A
Country	US
Kind code	B1
Filing date	Feb 22, 2018
Priority date	Sep 18, 2017
Publication date	Sep 11, 2018
Grant date	Sep 11, 2018

Abstract

A phased array of electrolytic fluid antennas 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 a plurality of electrolytic fluid antennas composed of free-standing streams of electrolytic fluid circularly-distributed about the center conduit, wherein each electrolytic fluid antenna is fluidically coupled to the center conduit by a fluid transmission line of a desired length, and wherein each electrolytic fluid antenna is configured to turn on or off in real time to change the characteristics of the phased array.

First claim

We claim:

1. A phased array of electrolytic fluid antennas 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
a plurality of electrolytic fluid antennas composed of free-standing streams of electrolytic fluid circularly-distributed about the center conduit, wherein each electrolytic fluid antenna is fluidically coupled to the center conduit by a fluid transmission line of a desired length, and wherein each electrolytic fluid antenna is configured to turn on or off in real time to change the characteristics of the phased array.

2. The phased array of electrolytic fluid antennas of claim 1 , wherein each electrolytic fluid antenna comprises a computer-controlled valve which allows the each electrolytic fluid antenna to be turned on or off.

3. The phased array of electrolytic fluid antennas of claim 2 , wherein the plurality of electrolytic fluid antennas are selected to operate based upon a frequency of operation of the phased array such that lambda over two spacing is maintained between electrolytic fluid antennas that are turned on, where lambda is an operating wavelength.

4. The phased array of electrolytic fluid antennas of claim 3 , wherein the electrolytic fluid antennas that are turned on are identical and are fed with an equal amount of power and an appropriate progressive phase shift thereby enabling the construction of steerable directive patterns.

5. The phased array of electrolytic fluid antennas of claim 2 , wherein the fluid transmission lines comprise internal control valves configured to control the flow of electrolytic fluid to the plurality of electrolytic fluid antennas such that the length of each fluid transmission line may be adjusted in real time.

6. The phased array of electrolytic fluid antennas of claim 5 , wherein the internal control valves are computer-controlled.

7. A method for dynamically beam steering a phased array of electrolytic fluid antennas 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 a plurality of electrolytic fluid antennas (each comprising a column of electrolytic fluid) to the electrolytic fluid in the center conduit, wherein the 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;
feeding the columns of electrolytic fluid with the current probe via magnetic induction to create the phased array antenna; and
altering the height of each of the columns of electrolytic fluid in real time by adjusting the pressure of the electrolytic fluid in the center conduit thereby altering the operating frequency of the phased array.

8. The method of claim 7 , wherein each of the columns of electrolytic fluid is a free-standing stream of electrolytic fluid.

9. A method for dynamically beam steering a phased array of electrolytic fluid antennas 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 a plurality of electrolytic fluid antennas (each comprising a nozzle from which exits a free-standing stream or column of electrolytic fluid) to the electrolytic fluid in the center conduit, wherein the 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;
feeding the columns of electrolytic fluid with the current probe via magnetic induction to create the phased array antenna; and
dynamically changing the operating frequency of the phased array in real time by opening a given set of nozzles and closing other nozzles, thereby effectively changing the length l of an electrolytic fluid transmission line between the center conduit and each nozzle.

10. The method of claim 8 , further comprising equating phase difference to phase shift obtained from a given electrolytic fluid transmission line of length l such that

2
⁢
π
⁢

⁢
d
⁢

⁢
sin
⁢

⁢

θ
0

λ
+

2
⁢
π
⁢

⁢
m

=

2
⁢

⁢
π
⁢

⁢
l

λ

⁢

⁢
and

sin
⁢

⁢

θ
0

=

-

m
⁢

⁢
λ

d

+

l
d

where d is the spacing between each electrolytic fluid antenna, m is an integer number and A is an operating wavelength.

11. The method of claim 10 , wherein each nozzle is a computer-controlled valve which allows the each electrolytic fluid antenna to be turned on or off.

12. The method of claim 11 , wherein the plurality of electrolytic fluid antennas are selected to operate based upon a frequency of operation of the phased array such that lambda A over two spacing is maintained between electrolyt

Assignees

• Us Navy
• Us Navy

Inventors

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

Classifications

• H01Q1/286

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

• H01Q21/062 Primary

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

• H01Q21/20

  the units being spaced along or adjacent to a curvilinear path {(slotted waveguide arrays H01Q21/005; circularly or helically slotted waveguides H01Q21/0062)} · CPC title

• H01Q3/26

  varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture ({H01Q3/12,} H01Q3/22, H01Q3/24 take precedence) · CPC title

• H01Q21/0087

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