SURFACE ANTENNA WITH A SINGLE RADIATION ELEMENT

• US 20150002362A1
• Filed: 01/17/2013
• Published: 01/01/2015
• Est. Priority Date: 01/18/2012
• Status: Active Grant

• Current Assignee: Bank, Michael, Haridim, Motti
• Original Assignee: Bank, Michael, Haridim, Motti
• Inventors: Bank, Michael, Haridim, Motti
• Granted Patent: US 9,685,704 B2
• Time in Patent Office: Days
• US Class Current: 343/859
• CPC Class Codes: H01P 1/18 Phase-shifters H01P1/165 takes precedence
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 21/245 provided with means for varying the polarisation polarising devices H01Q15/24; tracking by comparing linear polarisation compounds G01S3/146; reducing depolarisation effects H04B7/00; polarisation diversity H04B7/10
• CPC Class Codes: H01Q 9/045 with particular feeding means for circular polarisation H01Q9/0428
• CPC Class Codes: H03H 7/42 Networks for transforming balanced signals into unbalanced signals and vice versa, e.g. baluns

Abstract

A surface antenna with a single radiation element, which comprises (a) a power source with first and second poles; (b) a phase shifting element, inserted to the path of one of the poles of the power source in such a manner that the phase shifting device shifts the phase of a first signal propagating through said pole such that the shifted phase of the first signal will be essentially identical to the phase of a second signal propagating through the other pole. The shifted first signal is added to the second signal with essentially the same phase of second signal, whenever both poles are connected together to form a single-wire, through which the resulting added signal propagates. Alternatively, the antenna may include two phase shifting elements, coupled to each of the poles of said power source in such a manner that one of the two phase shifting elements shifts the phase of a first signal propagating through the first pole while the other phase shifting element shifts the phase of a second signal propagating through the second pole such that the shifted phases of both signals will be essentially identical, and such that the shifted signals are added with essentially the same phase, whenever both poles are connected together to form a single-wire, through which the resulting added signal propagates; (c) a radiation element, in the form of a flat radiation layer that may be adapted to match a variety of surfaces, for receiving the added signal, wherein the added signal may be spilt into two or more wire lines with identical or different lengths.

Claims

1. A surface antenna with a single radiation element, comprising:

a) a power source having first and second poles;

b) a phase shifting element, inserted to the path of one of the poles of said power source in such a manner that said phase shifting device shifts the phase of a first signal propagating through said pole such that the shifted phase of said first signal will be essentially identical to the phase of a second signal propagating through the other pole, and such that the shifted first signal is added to the second signal with essentially the same phase of second signal, whenever both poles are connected together to form a single-wire, through which the resulting added signal propagates;

or;

c) two phase shifting elements, coupled to each of the poles of said power source in such a manner that one of said two phase shifting elements shifts the phase of a first signal propagating through the first pole while the other phase shifting element shifts the phase of a second signal propagating through the second pole such that the shifted phases of both signals will be essentially identical, and such that the shifted signals are added with essentially the same phase, whenever both poles are connected together to form a single-wire, through which the resulting added signal propagates; and

d) a radiation element, in the form of a flat radiation layer that may be adapted to match a variety of surfaces, for receiving said added signal, wherein said added signal may be spilt into two or more wire lines with identical or different lengths.

2. An antenna according to claim 1, in which the radiation element is made of conducting material that are optically transparent (in the visible spectrum).

3. An antenna according to claim 1, in which the phase shifting element is an inverter that shifts the phase of its corresponding pole by 180 degrees, such that the shifted signal(s) is added with essentially the same phase.

4. An antenna according to claim 1, in which each phase shifting element of the two phase shifting elements shifts the phase of its corresponding pole by +90 degrees or by −

90 degrees, such that the shifted signals in both poles are added with essentially the same phase.

5. An antenna according to claim 1, in which the phase shifting element is made of two spirals with wires lengths that are equal to half the wavelength and connecting them in parallel in opposite directions, such that their fields will be compensated.

6. An antenna according to claim 1, in which the phase shifting element is implemented by cable longer by half the wavelength than the cable without the phase-shifting.

7. An antenna according to claim 1, in which the phase shifting element is implemented by a strip line circuit, using a dielectric with high-dielectric constant compared to air permeability.

8. An antenna according to claim 1, further comprises a balanced-to-unbalanced converting (Balun) device coupled to both poles of the power source for balancing the signals generated by said power source.

9. An antenna according to claim 1, in which the radiation element is made of a thin layer grown on a substrate, or stuck to it.

10. An antenna according to claim 1, in which the radiation element is selected from the group consisting of a flat board, a flexible surface, a conducting tape or a conductive cloth.

11. A phase shifting element, comprising two spirals with wires lengths that are equal to half the wavelength and connecting them in parallel in opposite directions, such that their fields will be compensated.

12. A single polar source, comprising:

a) a power sources having first and second poles; and

b) a phase shifting element, coupled to one of the poles of said power source in such a manner that said phase shifting element shifts the phase of a first signal propagating through said pole such that the shifted phase of said first signal will be essentially identical to the phase of a second signal propagating through the other pole, and such that the shifted first signal is added to the second signal with essentially the same phase of second signal, whenever both poles are connected together to form a single-wire, through which the resulting added signal propagates;

or;

c) two phase shifting elements, coupled to each of the poles of said power source in such a manner that one of said two phase shifting elements shifts the phase of a first signal propagating through the first pole while the other phase shifting element shifts the phase of a second signal propagating through the second pole such that the shifted phases of both signals will be essentially identical, and such that the shifted signals are added with essentially the same phase, whenever both poles are connected together to form a single-wire, through which the resulting added signal propagates.

13. A single polar source according to claim 12, in which the phase shifting element is an inverter that shifts the phase of its corresponding pole by 180 degrees, such that the shifted signal is added with essentially the same phase.

14. A single polar source according to claim 12, in which each shifting element of the two phases shifting elements shifts the phase of its corresponding pole by +90 degrees or by −

90 degrees, such that the shifted signals in both poles are added with essentially the same phase.

15. A single polar source according to claim 12, in which the phase shifting element is made of two spirals with wires lengths that are equal to half the wavelength and connecting them in parallel in opposite directions, such that their fields will be compensated.

16. A single polar source according to claim 12, further comprises a balanced-to-unbalanced converting (balun) device coupled to both poles of the power source for balancing the signals generated by said power source, such that the output of said power source is provided in a balanced manner by the corresponding outputs of said balun.

17. A single polar source according to claim 16, in which the phase shifting element is embedded in one of the wires connected to one of the outputs of the balun by means of extra length with respect to the wire connected at the other output of said balun.