BROADBAND MONOPOLE ANTENNA WITH DUAL RADIATING STRUCTURES

• US 20110316755A1
• Filed: 06/28/2010
• Published: 12/29/2011
• Est. Priority Date: 06/28/2010
• Status: Active Grant

• Current Assignee: Malikie Innovations Limited (Key Patent Innovations Limited)
• Original Assignee: Blackberry Limited
• Inventors: Ayatollahi, Mina, Rao, Qinjiang
• Granted Patent: US 8,531,344 B2
• Time in Patent Office: Days
• US Class Current: 343/793
• CPC Class Codes: H01Q 5/25 Ultra-wideband [UWB] systems, e.g. multiple resonance systems; Pulse systems
• CPC Class Codes: H01Q 9/0407 Substantially flat resonant element parallel to ground plane, e.g. patch antenna dipole H01Q9/285; monopole H01Q9/40
• CPC Class Codes: H01Q 9/28 Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines waveguide horns or mouths H01Q13/00; slot antennas H01Q13/00
• CPC Class Codes: H01Q 9/40 Element having extended radiating surface
• CPC Class Codes: H01Q 9/44 with a plurality of divergent straight elements, e.g. V-dipole, X-antenna; with a plurality of elements having mutually inclined substantially straight portions combinations of two or more active elements H01Q21/00; turnstile antennas H01Q21/26

Abstract

A broadband monopole antenna with dual-radiating elements is provided. In one embodiment, an antenna comprises a ground plane; a first radiating structure having a symmetric configuration along a central axis, comprising a first feed point electrically connected to the base of said first radiating structure along said central axis and a first slot with a corresponding first open-ended strip along said central axis; and a second radiating structure conjoined with said first radiating structure having a symmetric configuration along said central axis, comprising a second feed point electrically connected to the base of said second radiating structure along said central axis and a second slot with a corresponding second open-ended strip along said central axis; and wherein the antenna resonates and operates at a plurality of resonant frequencies.

Claims

1. An antenna, comprising:

a ground plane;

a first radiating structure having a symmetric configuration along a central axis, comprising;

a first feed point electrically connected to the base of said first radiating structure along said central axis; and

a first slot with a corresponding first open-ended strip along said central axis; and

a second radiating structure conjoined with said first radiating structure having a symmetric configuration along said central axis, comprising;

a second feed point electrically connected to the base of said second radiating structure along said central axis; and

a second slot with a corresponding second open-ended strip along said central axis; and

wherein the antenna resonates and operates at a plurality of resonant frequencies.

2. The antenna of claim 1, wherein said first and said second radiating structures are conducting materials.

3. The antenna of claim 1, wherein said first and said second radiating structures are conducting materials and are placed on or between a dielectric material.

4. The antenna of claim 1, wherein said ground plane is placed on or between a dielectric material.

5. The antenna of claim 1, further comprising:

a dielectric material set between any combination of said first radiating structure, said second radiating structure, and said ground plane.

6. The antenna of claim 1, wherein said first and said second feed points are electrically connected to a transmitter, receiver, or both.

7. The antenna of claim 1, wherein said first and said second feed points are electrically connected to a first conductor of a coaxial connector, and said ground plane is electrically connected to a second conductor of said coaxial connector.

8. The antenna of claim 1, wherein said first feed point is electrically connected to a first conductor of a coaxial connector, and said second feed point is electrically connected to a second conductor of said coaxial connector.

9. The antenna of claim 1, wherein adjusting a first angle between said first radiating structure and said ground plane, adjusting a second angle between said second radiating structure and said ground plane, or both modifies the operating frequency bandwidth, input impedance, resonant frequency, polarization characteristics, or any combination thereof of the antenna.

10. The antenna of claim 9, wherein said first and said second angles are about the same.

11. The antenna of claim 1, wherein adjusting the location, length, width, shape, or any combination thereof of said first slot, second slot, or both modifies the operating frequency bandwidth, input impedance, resonant frequency, polarization characteristics, or any combination thereof of the antenna.

12. The antenna of claim 1, wherein said first and said second slots have about the same location, length, width, shape, or any combination thereof.

13. The antenna of claim 1, wherein said first and said second open-ended strips have about the same location, length, width, shape, or any combination thereof.

14. The antenna of claim 1, wherein a side of said first open-ended strip extends to an edge of said first radiating structure to form a first notch, a side of said second open-ended strip extends to an edge of said second radiating structure to form a second notch, or both.

15. The antenna of claim 1, wherein adjusting a third angle between said first open-ended strip and said first radiating structure, adjusting a fourth angle between said second open-ended strip and said second radiating structure, or both modifies the operating frequency bandwidth, input impedance, resonant frequency, polarization characteristics, or any combination thereof of the antenna.

16. The antenna of claim 1, wherein said third and fourth angles are about the same.

17. The antenna of claim 1, wherein the shape of said first and second radiating structures are generally petal figures.

18. The antenna of claim 1, wherein the angle between said first and said second radiating structures is about ninety degrees.

19. The antenna of claim 1, wherein the angle between said first and second radiating structures is about zero degrees.

20. The antenna of claim 1, wherein the antenna is used to provide polarization diversity.

21. The antenna of claim 1, wherein the antenna is used to provide frequency diversity.

22. A device in a wireless communication system, comprising:

a transmitter for transmitting information over a frequency band;

a receiver for receiving information over a frequency band; and

an antenna electrically connected to said transmitter and said receiver, comprising;

a ground plane;

a first radiating structure, comprising;

a first feed point electrically connected to the base of said first radiating structure along a central axis; and

a first slot with a corresponding first open-ended strip having a symmetric configuration along said central axis; and

a second radiating structure conjoined with said first radiating structure, comprising;

a second feed point electrically connected to the base of said second radiating structure along a central axis, wherein said first and second feed points are configured to electrically connect said antenna to said transmitter, said receiver, or both; and

a second slot with a corresponding second open-ended strip having a symmetric configuration along said central axis; and

wherein said antenna resonates and operates at a plurality of resonant frequencies.

23. The device of claim 22, wherein a side of said first open-ended strip extends to an edge of said first radiating structure to form a first notch, a side of said second open-ended strip extends to the edge of said second radiating structure to form a second notch, or both.

24. An antenna, comprising:

a ground plane;

a radiating structure with a feed point along a central axis for resonating and operating at a plurality of resonant frequencies, wherein said radiating structure has the shape of a pair of conjoined generally petal figures with each figure having a slot and corresponding open-ended strip with a symmetric configuration along said central axis, wherein a side of each of said open-ended strips extend to the edge of said radiating structure to form a notch.

25. An antenna, comprising:

a ground plane;

a radiating structure with a feed point along a central axis for resonating and operating at a plurality of resonant frequencies, wherein said radiating structure has the shape of a petal figure with a slot and corresponding open-ended strip, and has a symmetric configuration along said central axis, wherein a side of said open-ended strip extends to the edge of said radiating structure to form a notch.