Multiple-element antenna

• US 6,950,071 B2
• Filed: 07/02/2003
• Issued: 09/27/2005
• Est. Priority Date: 04/12/2001
• Status: Expired due to Term

• Current Assignee: Malikie Innovations Limited (Key Patent Innovations Limited)
• Original Assignee: Blackberry Limited
• Inventors: Qi, Yihong, Jarmuszewski, Perry, Bandurska, Krystyna, Wen, Geyi
• Primary Examiner(s): Vannucci, James
• Application Number:
  US10/613,109
• Publication Number:
  US 20040004574A1
• Time in Patent Office: 818 Days
• Field of Search: 343/702, 343/700.MS, 343/795, 343/727, 343/730
• US Class Current: 343/702
• 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 21/28 Combinations of substantially independent non-interacting antenna units or systems multiple beam H01Q25/00
• CPC Class Codes: H01Q 5/40 Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
• 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

Abstract

A multiple-element antenna is provided that includes a monopole portion and a dipole portion. The monopole portion has a top section, a middle section, and a bottom section. The middle section defines a recess between the top and bottom sections, and the bottom section includes a monopole feeding port configured to couple the monopole portion of the multiple-element antenna to communications circuitry in a mobile communication device. The dipole portion has at least one dipole feeding port configured to couple the dipole portion of the multiple-element antenna to communications circuitry in the mobile communications device. The dipole portion of the multiple-element antenna is positioned within the recess defined by the monopole portion of the multiple-element antenna in order to electromagnetically couple the monopole portion with the dipole portion.

Claims

1. A multiple-element antenna for use with a mobile communication device having a transmitter and a receiver, wherein the multiple-element antenna includes a monopole portion coupled to the receiver and a dipole portion coupled to the transmitter, the multiple-element antenna comprising:

a single dielectric substrate; and

the monopole portion and the dipole portion fabricated on the single dielectric substrate;

wherein the dipole portion is fabricated in close proximity to the monopole portion in order to electromagnetically couple the monopole portion with the dipole portion.

2. The multiple-element antenna of claim 1, wherein the multiple-element antenna is mounted on at least one inside surface of the mobile communication device.

3. The multiple-element antenna of claim 1, wherein the mobile communication device is a dual-band mobile communication device, and wherein the monopole portion is tuned to a first operating frequency and the dipole portion is tuned to a second operating frequency.

4. The multiple-element antenna of claim 1, wherein the mobile communication device is selected from the group consisting of:

a Personal Digital Assistant, a cellular telephone, and a wireless two-way email communication device.

5. The multiple-element antenna of claim 1, wherein the single dielectric substrate is a flexible dielectric substrate.

6. The multiple-element antenna of claim 1, wherein:

the monopole portion includes a top section, a middle section and a bottom section, the middle section defining a recess between the top and bottom sections, and the bottom section including a monopole feeding port configured to couple the monopole portion to communications circuitry in the mobile communication device;

the dipole portion having at least one dipole feeding port configured to couple the dipole portion to communications circuitry in the mobile communication device; and

the dipole portion being positioned within the recess in order to electromagnetically couple the monopole portion with the dipole portion.

7. The multiple-element antenna of claim 6, wherein the top section of the monopole portion includes a meandering line.

8. The multiple-element antenna of claim 7, wherein the conductor length of the meandering line is pre-selected to tune the monopole portion to an operating frequency.

9. The multiple-element antenna of claim 1, wherein the dipole portion is an open folded dipole antenna.

10. The multiple-element antenna of claim 1, wherein the dipole portion is an offset feed, open folded dipole antenna.

11. The multiple-element antenna of claim 1, wherein the dipole portion includes a top load.

12. The multiple-element antenna of claim 11, wherein the dimensions of the top load are pre-selected to tune the dipole portion to an operating frequency.

13. The multiple-element antenna of claim 1, wherein the dipole portion includes a first conductor section and a second conductor section.

14. The multiple-element antenna of claim 13, wherein the first and second conductor sections define a gap.

15. The multiple-element antenna of claim 14, wherein the size of the gap is pre-selected to set the gain of the dipole portion.

16. The multiple-element antenna of claim 6, wherein the monopole feeding port couples the monopole portion to a receiver in the mobile communication device.

17. The multiple-element antenna of claim 6, wherein the dipole feeding port couples the dipole portion to a transmitter in the mobile communication device.

18. The multiple-element antenna of claim 2, wherein the single dielectric substrate is folded to mount the multiple-element antenna to a plurality of perpendicular inside surfaces of the mobile communication device.