ANTENNA FOR DIVERSITY APPLICATIONS

• US 20100295750A1
• Filed: 10/09/2008
• Published: 11/25/2010
• Est. Priority Date: 10/09/2007
• Status: Abandoned Application

• Current Assignee: Agency For Science Technology and Research
• Original Assignee: Agency For Science Technology and Research
• Inventors: See, Shie Ping Terence, Chen, Zhining
• Application Number:
  US12/734,083
• Publication Number:
  US 20100295750A1
• Time in Patent Office: Days
• US Class Current: 343/893
• 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
• CPC Class Codes: H01Q 9/0435 using two feed points

Abstract

An antenna for ultra-wideband applications is disclosed. The antenna has a first radiating element shaped for defining a first notch, the first radiating element having a first feeding structure. The antenna further has a second radiating element operatively couplable to the first radiating element and shaped for defining a second notch. The second radiating element having a second feeding structure, the first and second feeding structures being substantially orthogonal to each other and the first and second radiating elements having an inter-displacement. More specifically, the first radiating element and the first feeding structure is substantially symmetrical to the second radiating element and the second feeding structure respectively about a line of symmetry passing through the inter-displacement between the first and second radiating elements for achieving orthogonal polarization and radiating pattern diversity between the first and second radiating elements.

Claims

1. An antenna for ultra wideband applications, the antenna comprising:

a first radiating element shaped for defining a first notch, the first radiating element having a first feeding structure; and

a second radiating element operatively couplable to the first radiating element and shaped for defining a second notch, the second radiating element having a second feeding structure, the first and second feeding structures being substantially orthogonal to each other and the first and second radiating elements having an inter-displacement,

wherein the first radiating element and the first feeding structure is substantially symmetrical to the second radiating element and the second feeding structure respectively about a line of symmetry passing through the inter-displacement between the first and second radiating elements for achieving orthogonal polarization and radiating pattern diversity between the first and second radiating elements.

2. The antenna of claim 1, wherein the first notch extends substantially parallel to the first feeding structure and the second notch extends substantially parallel to the second feeding structure.

3. The antenna of claim 1, wherein each of the first and second notches has an opening, the opening of the first notch facing inwardly the opening of the second notch.

4. The antenna of claim 1, wherein the first and second radiating elements are formed on a surface of a substrate.

5. The antenna of claim 1, wherein a ground plane is formed on another surface of the substrate opposite to the surface on which the first and second radiating elements are formed.

6. The antenna of claim 5, wherein each of the first and second radiating elements does not overlap with the ground plane.

7. The antenna of claim 5, wherein the ground plane has a central strip extending in between the first and second radiating elements for reducing mutual coupling between the first and second radiating elements.

8. The antenna of claim 1, further comprises an arm extending from the second portion of the first radiating element.

9. The antenna of claim 8, wherein the arm extends substantially outwardly from the second portion of the first radiating element.

10. The antenna of claim 8, wherein the arm has a first section and a second section, one end of the first section being connected to the second portion of the radiating element and the second section being extended perpendicularly from the other end of the first section.

11. A method for configuring an antenna comprising:

providing a first radiating element shaped for defining a first notch, the first radiating element having a first feeding structure; and

providing a second radiating element operatively couplable to the first radiating element and shaped for defining a second notch, the second radiating element having a second feeding structure, the first and second feeding structures being substantially orthogonal to each other and the first and second radiating elements having an inter-displacement,

wherein the first radiating element and the first feeding structure is substantially symmetrical to the second radiating element and the second feeding structure respectively about a line of symmetry passing through the inter-displacement between the first and second radiating elements for achieving orthogonal polarization and radiating pattern diversity between the first and second radiating elements.

12. The method of claim 11, providing the first and second radiating elements further comprising forming the first notch extends substantially parallel to the first feeding structure and the second notch extends substantially parallel to the second feeding structure.

13. The method of claim 12, further comprising forming an opening in each of the first and second notches, the opening of the first notch facing inwardly the opening of the second notch.

14. The method of claim 12, further comprising forming the first and second radiating elements on a surface of a substrate.

15. The method of claim 14, further comprising forming a ground plane on another surface of the substrate opposite to the surface on which the first and second radiating elements are formed.

16. The method of claim 15, wherein each of the first and second radiating elements are formed without overlapping with the ground plane.

17. The method of claim 16, further comprising extending a central strip from a portion of the ground plane in between the first and second radiating elements for reducing mutual coupling between the first and second radiating elements.

18. The method of claim 11, further comprising extending an arm from the second portion of the first radiating element.

19. The method of claim 18, wherein extending an arm from the second portion of the first radiating element comprises extending the arm substantially outwardly from the second portion of the first radiating element.

20. The method of claim 18, wherein the arm has a first section and a second section, one end of the first section being connected to the second portion of the radiating element and the second section being extended perpendicularly from the other end of the first section.