Multi-layer reactively loaded isolated magnetic dipole antenna

• US 8,421,702 B2
• Filed: 04/12/2010
• Issued: 04/16/2013
• Est. Priority Date: 08/29/2007
• Status: Active Grant

• Current Assignee: Kyocera AVX Components San Diego Inc (Kyocera Corporation)
• Original Assignee: Ethertronics, Inc. (Kyocera Corporation)
• Inventors: Desclos, Laurent, Rowson, Sebastian, Shamblin, Jeffrey, Cha, Young, Han, Chulmin, Kwak, Byoeng Sug
• Primary Examiner(s): PHAN, THO GIA
• Application Number:
  US12/758,725
• Publication Number:
  US 20100259456A1
• Time in Patent Office: 1,100 Days
• Field of Search: 343/700, 343/730, 343/795, 343/846
• US Class Current: 343/795
• CPC Class Codes: H01Q 7/00 Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop

Abstract

A multi-layer reactively loaded isolated magnetic (IMD) dipole with improved bandwidth and efficiency characteristics to be used in wireless communications and other applicable systems. The multi-layer IMD antenna comprises a first element positioned above a ground plane, a second element positioned above a ground plane and coupled to the first portion. Reactive components are integrated into one or both elements to optimize the frequency response of the antenna. The range of frequencies covered to be determined by the shape, size, and number of elements in the physical configuration of the components. Portions of or the entire ground plane can be removed beneath the elements.

Claims

1. An antenna, comprising;

an IMD (isolated magnetic dipole) element positioned above a ground plane,

a second element positioned above said ground plane in proximity with said IMD element,

said IMD element comprising a feed and ground connection and being connected to one of a transceiver or a receiver,

said IMD element having a first portion, a second portion and a gap therebetween, wherein a bridge component connects said first portion to said second portion,

said second element having a first end and a second end,

wherein said second element is connected to said ground plane at said first end, and

wherein said second element is capacitively coupled to said IMD element at said second end.

2. The antenna of claim 1, wherein a space between said IMD element and said second element is occupied by air.

3. The antenna of claim 1, wherein a space between said IMD element and said second element is occupied by a dielectric.

4. The antenna of claim 1, wherein the ground plane is at least partially removed from an area beneath the IMD antenna.

5. The antenna of claim 1, where said second element is an IMD element.

6. The antenna of claim 1, wherein said second element is selected from the group consisting of:

a monopole, dipole, IFA (inverted F antenna), and PIFA (planar inverted F antenna).

7. The antenna of claim 1, wherein said bridge component is selected from the group consisting of:

a capacitor, inductor, resistor, diode, active component, or a switch.

8. The antenna of claim 7, wherein said bridge component is capable of optimizing the frequency response of the antenna.

9. The antenna of claim 1, said IMD element having N portions and (N-1) gaps therebetween;

wherein N is a positive integer greater than 1, and wherein one or more bridge components connect said portions at said gaps.

10. The antenna of claim 9, wherein said bridge components are individually selected from the group consisting of:

a capacitor, inductor, resistor, diode, active component, or a switch.

11. The antenna of claim 10, wherein at least one of said bridge components is adapted to optimize the frequency response of the antenna.

12. The antenna of claim 1, said second element having N portions and (N-1) gaps therebetween;

wherein N is a positive integer greater than 1, and wherein one or more bridge components connect said portions at said gaps.

13. The antenna of claim 12, said IMD element having N portions and (N-1) gaps therebetween;

wherein N is a positive integer greater than 1, and wherein one or more bridge components connect said portions at said gaps.

14. The antenna of claim 1, wherein a bridge component connects said second element to said ground plane.

15. The antenna of claim 1, wherein a bridge component connects said IMD element to said ground plane.

16. The antenna of claim 1, said antenna comprising three or more antenna elements, said antenna elements selected from the group consisting of:

a monopole, dipole, IFA (inverted F antenna), and PIFA (planar inverted F antenna), wherein a plurality of antenna elements are positioned in proximity to and coupled with said IMD element.

17. The antenna of claim 16, wherein at least one of said antenna elements comprises a first portion, a second portion and a gap therebetween, wherein a bridge component connects said first portion to said second portion at said gap.