WIDEBAND CIRCULARLY POLARIZED HYBRID DIELECTRIC RESONATOR ANTENNA

• US 20120212386A1
• Filed: 02/21/2011
• Published: 08/23/2012
• Est. Priority Date: 02/21/2011
• Status: Active Grant

• Current Assignee: Her Majesty The Queen In Right of Canada As Represented By The Minister of National Defence
• Original Assignee: Her Majesty The Queen In Right of Canada As Represented By The Minister of National Defence
• Inventors: Massie, Gabriel, Caillet, Mathieu, Clenet, Michel, Antar, Yahia M.M.
• Granted Patent: US 8,928,544 B2
• Time in Patent Office: Days
• US Class Current: 343/850
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 9/0492 circularly polarised

Abstract

The present invention provides a dielectric resonator antenna comprising: a dielectric resonator; a ground plane, operatively coupled with the dielectric resonator, the ground plane having four slots; and a substrate, operatively coupled to the ground plane, having a feeding network consisting of four microstrip lines; wherein the four slots are constructed and geometrically arranged to ensure proper circular polarization and coupling to the dielectric resonator; and wherein the antenna feeding network combines the four microstrip lines with a 90 degree phase difference to generate circular polarization over a wide frequency band.

Claims

1. A dielectric resonator antenna comprising:

a dielectric resonator;

a ground plane, operatively coupled with the dielectric resonator, the ground plane having four slots; and

a substrate, operatively coupled to the ground plane, having a feeding network consisting of four microstrip lines;

wherein the four slots are constructed and geometrically arranged to ensure proper circular polarization and coupling to the dielectric resonator; and

wherein the antenna feeding network combines the four microstrip lines with a 90 degree phase difference to generate circular polarization over a wide frequency band.

2. The dielectric resonator antenna as in claim 1, further including a back plate housing operatively coupled to the substrate.

3. The dielectric resonator antenna as in claim 1, wherein the slots are arc in shape.

4. The dielectric resonator antenna as in claim 1, wherein the slots are rectangular in shape.

5. The dielectric resonator antenna as in claim 1, wherein the dielectric resonator is cylindrical in shape.

6. The dielectric resonator antenna as in claim 1, wherein the dielectric resonator has an optimal dielectric permittivity and optimal dimensions to operate at a frequency suitable for a specific application.

7. The dielectric resonator antenna as in claim 1, wherein the dielectric resonator has an optimal dielectric permittivity to obtain a specific bandwidth.

8. The dielectric resonator antenna as in claim 1, wherein the dielectric resonator has optimal dimensions to reduce the physical size of the antenna.

9. The dielectric resonator antenna as in claim 1, wherein the dielectric resonator is square in shape.

10. The dielectric resonator antenna as in claim 1, wherein the dielectric resonator is glued to the ground plane.

11. The dielectric resonator antenna as in claim 1, further includes plated thru holes that provide a common ground plane between the dielectric resonator and the feeding network.

12. The dielectric resonator antenna as in claim 1, wherein the feeding network includes a compact wideband rat-race combined with two surface mount (SMT) branch-line hybrid couplers.

13. The dielectric resonator antenna as in claim 1, wherein the optimal dielectric permittivity has a range of approximately 10 to approximately 30.

14. The dielectric resonator antenna as in claim 1, further including a metallic back plate housing operatively coupled to the substrate.

15. The dielectric resonator antenna as in claim 1, wherein the substrate is made of FR-4 material.

16. The dielectric resonator antenna as in claim 1, wherein the substrate is made of CER-10 material.

17. The dielectric resonator antenna as in claim 5, wherein the four rectangular slots excite four degenerate HE11δ

resonance modes.

18. The dielectric resonator antenna as in claim 4, wherein the four rectangular slots excite two degenerate TEδ

11 and TE1δ

1 modes.

19. The dielectric resonator antenna as in claim 4, wherein the length of the rectangular-shaped slots is approximately λ

g/2 at approximately 1.25 GHz.