E H antenna

• US 6,486,846 B1
• Filed: 05/23/2000
• Issued: 11/26/2002
• Est. Priority Date: 05/23/2000
• Status: Expired due to Fees

• Current Assignee: EH Antenna Systems, LLC
• Original Assignee: Robert T. Hart
• Inventors: Hart, Robert T.
• Primary Examiner(s): Wimer, Michael C.
• Application Number:
  US09/576,449
• Time in Patent Office: 917 Days
• Field of Search: H01/Q.150, H01/Q.924, 343/773, 343/774, 343/822, 343/852, 343/860, 343/808, 343/840, 343/859, 343/821, 343/807
• US Class Current: 343/773
• CPC Class Codes: H01Q 21/24 Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction circularly polarised patch antennas H01Q9/0428; circularly polarised horns H01Q13/0241; cross-polarised horns H01Q13/0258; polarisation converters H01Q15/242; cross-polarised rear feeds H01Q19/136; crossed polarisation dual antenna H01Q25/001
• CPC Class Codes: H01Q 21/29 Combinations of different interacting antenna units for giving a desired directional characteristic H01Q25/00 takes precedence

Abstract

In an antenna system for transmitting and receiving, in association with a radio device, electromagnetic radiation has an E-field component and an H-field component. The electromagnetic radiation corresponds to a radio frequency power signal having a current and a voltage at a radio frequency. The antenna system includes a first radiating element and a second radiating element, each comprising a conductive material. The second radiating element is spaced apart from, and in alignment with, the first radiating element. A phasing and matching network is in electrical communication with the first radiating element, the second radiating element and the radio device. The phasing and matching network aligns the relative phase between the current and the voltage of the radio frequency power signal so that the H-field component of the corresponding electromagnetic signal is nominally in time phase with the E-field component.

Claims

1. An antenna system for transmitting and receiving, in association with a radio device, electromagnetic radiation having an E-field component and an H-field component, the electromagnetic radiation corresponding to a radio frequency power signal having a current and a voltage at a radio frequency, the current and the voltage each having a phase, the antenna system comprising:

a. a first radiating element comprising a conductive material;

b. a second radiating element comprising a conductive material, the second radiating element spaced apart from and in alignment with the first radiating element; and

c. a phasing and matching network, in electrical communication with the first radiating element, the second radiating element and the radio device, that aligns the relative phase between the current and the voltage of the radio frequency power signal so that the H-field component of the corresponding electromagnetic signal is nominally in time phase with the E-field component, the phasing and matching network including;

i. a first reactive element of a first type that electrically couples a first terminal of the radio device to the first radiating element;

ii. a second reactive element of a second type that electrically couples a second terminal of the radio device to the first radiating element;

iii. a third reactive element of the first type that electrically couples the second terminal of the radio device to the second radiating element; and

iv. a fourth reactive element of the second type that is electrically in parallel with the third reactive element.

2. The antenna system of claim 1, wherein the radio device is a transmitter.

3. The antenna system of claim 1, wherein the radio device is a receiver.

4. The antenna system of claim 1, wherein the first type of reactive element comprises an inductor and wherein the second type of reactive element comprises a capacitor.

5. The antenna system of claim 1, wherein the first type of reactive element comprises a capacitor and wherein the second type of reactive element comprises an inductor.

6. The antenna system of claim 1, wherein the first radiating element and the second radiating element each comprise a cylinder.

7. The antenna system of claim 1, wherein the first radiating element and the second radiating element each comprise a conic section.

8. The antenna system of claim 7, wherein each conic section includes a narrow end and a wide end, the narrow end of the conic section of the first radiating element being disposed adjacent to the narrow end of the conic section of the second radiating element.

9. The antenna system of claim 7, wherein each conic section includes a narrow end and a wide end, the antenna system further comprising a first cover disposed so as to cover the wide end of the conic section comprising the first radiating element and a second cover disposed so as to cover the wide end of the conic section comprising the second radiating element.

10. The antenna system of claim 1, further comprising a reflective shape disposed around the first radiating element and the second radiating element so as to reflect a portion of any electromagnetic radiation emanating from between the first radiating element and the second radiating element along a preselected direction.

11. A method of transmitting and receiving, in association with a radio device, electromagnetic radiation having an E-field component and an H-field component, the electromagnetic radiation corresponding to a radio frequency power signal having a current and a voltage at a radio frequency, the current and the voltage each having a phase, comprising the step of aligning the relative phase between current and the voltage of the radio frequency power signal so that the H-field component of the corresponding electromagnetic signal is nominally in time phase with the E-field component, whereby the aligning step includes the following steps:

i. coupling a first terminal of the radio device to a first radiating element with a first reactive element of a first type;

ii. coupling a second terminal of the radio device to the first radiating element with a second reactive element of a second type;

iii. coupling a second terminal of the radio device to a second radiating element with a third reactive element of the first type; and

iv. placing a fourth reactive element of the second type electrically in parallel with the third reactive element.

12. The method of claim 11, further comprising the step of directing the radio frequency, power signal from a transmitter to an antenna having said first radiating element and said second radiating element, thereby generating the electromagnetic radiation between the first radiating element and the second radiating element.

13. The method of claim 12, further comprising the step of disposing the first radiating element so as to be in alignment with the second radiating element.

14. The method of claim 12, further comprising disposing the first radiating element and the second radiating element in a reflective shape so as to direct an electromagnetic beam substantially along a selected direction.

15. The method of claim 14, further comprising the step of choosing a reflective shape so that the beam follows a near vertical incidence profile.

16. The method of claim 11, further comprising the step of directing the radio frequency power signal from an antenna having said first radiating element and said second radiating element to a receiver.

17. The method of claim 16, further comprising the step of disposing the first radiating element so as to be in alignment with the second radiating element.

18. The method of claim 16, further comprising disposing the first radiating element and the second radiating element in a reflective shape so as to direct an electromagnetic beam substantially along a selected direction.

19. The method of claim 18, further comprising the step of choosing a reflective shape so that the beam follows a near vertical incidence profile.