MULTI-BAND ANTENNA

• US 20080278377A1
• Filed: 06/04/2007
• Published: 11/13/2008
• Est. Priority Date: 05/09/2007
• Status: Abandoned Application

• Current Assignee: Sony Ericsson Mobile Communications USA Incorporated (Sony Group Corp.)
• Original Assignee: Sony Ericsson Mobile Communications USA Incorporated (Sony Group Corp.)
• Inventors: VANCE, Scott LaDell
• Application Number:
  US11/757,478
• Publication Number:
  US 20080278377A1
• Time in Patent Office: Days
• US Class Current: 343/700MS
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 1/36 Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewithH01Q1/08, H01Q1/14 take precedence
• CPC Class Codes: H01Q 1/38 formed by a conductive layer on an insulating support patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface H01Q15/142
• CPC Class Codes: H01Q 5/328 between a radiating element and ground
• CPC Class Codes: H01Q 5/371 Branching current paths
• CPC Class Codes: H01Q 9/42 with folded element, the folded parts being spaced apart a small fraction of the operating wavelength

Abstract

A monopole antenna having multiple resonances includes a feed point; a meander element; and an electrically conductive element that couples the feed point to the meander element, the electrically conductive element including at least a portion with a width that is greater than the width of the meander element.

Claims

1. A monopole antenna having multiple resonances, comprising:

a feed point;

a meander element; and

an electrically conductive element that couples the feed point to the meander element, the electrically conductive element comprising at least a portion with a width that is greater than the width of the meander element.

2. The monopole antenna of claim 1, wherein the width of the electrically conductive element is at least 1.5 times the width of the meander element.

3. The monopole antenna of claim 2, wherein the width of the electrically conductive element is at least 2.0 times the width of the meander element.

4. The monopole antenna of claim 1, further comprising a branch element along at least one of the feed point and the electrically conductive element, the branch element being coupled to ground.

5. The monopole antenna of claim 4, wherein the branch element is less than one third the width of the electrically conductive element.

6. The monopole antenna of claim 5, wherein the branch element is between one-third and one-fiftieth the width of the electrically conductive element.

7. The monopole antenna of claim 4, wherein the branch element is coupled at one end to the electrically conductive element.

8. The monopole antenna of claim 4, further comprising an additional branch element positioned between the branch element and the at least one of the feed point and the electrically conductive element, the additional branch element being coupled to either the ground point or the feed point.

9. The monopole antenna of claim 8, wherein the additional branch element is coupled to the ground point.

10. The monopole antenna of claim 8, wherein the additional branch element is coupled to the feed point.

11. The monopole antenna of claim 4, further comprising an additional branch element electrically coupled to the branch element, wherein the additional branch element is positioned on a side of the branch element opposite the side of the electrically conductive element.

12. The monopole antenna of claim 1, wherein at least part of the portion of the electrically conductive element is located sufficiently close to the feed point such that capacitive coupling occurs between the two, thereby further enhancing bandwidth.