Dual-band LTE MIMO antenna

Patent metadata

Field	Value
Publication number	US-9653779-B2
Application number	US-201213551913-A
Country	US
Kind code	B2
Filing date	Jul 18, 2012
Priority date	Jul 18, 2012
Publication date	May 16, 2017
Grant date	May 16, 2017

Abstract

A multiple-input-multiple output antenna for use with wireless communication comprises a first element a first radiation element operable to resonate at a first frequency and a second radiation element operable to resonate at a second frequency, wherein the second frequency is not an integer multiple of the first frequency. The first and second antenna radiation elements are each proximate to a ground plane and the respective resonance frequencies of the first radiation element and the second radiation element is achieved by controlling the electrical coupling between the first radiation element, the second radiation element and the ground plane and the resonance frequencies of the first and second radiation elements is controlled independently.

First claim

What is claimed is:

1. A wireless communication device that uses at least at two frequencies, comprising:
a support having:
a first planar surface in a first plane and a second planar surface in a second plane between which extend a plurality of planar side surfaces, each in a respective plane, the second planar surface spaced from the first planar surface;
a first corner formed by an abutment of the first planar surface and a first pair of the plurality of side surfaces; and
a second corner formed by an abutment of the first planar surface and a second pair of side surfaces, where at least one of the side surfaces of the second pair is different to the first pair;

a first antenna disposed at the first corner of the support and configured to have:
a first single feed point, being a singular feed point of the first antenna, the first single feed point formed on a first side surface of the first pair of side surfaces;
a first rectangular planar radiation element disposed on a second side surface of the first pair of side surfaces in a plane substantially orthogonal to a plane of the first side surface on which the first single feed point is formed, the first rectangular planar radiation element spaced from said first corner and configured to resonate at a first frequency when excited at the first single feed point;
a second rectangular radiation element configured to form a corner at the first corner, a first rectangular portion of the second rectangular radiation element spaced from, and coplanar with the first rectangular planar radiation element, a remaining second rectangular portion substantially orthogonal to said first rectangular portion and substantially coplanar with the plane of the first feed point, the second rectangular radiation element configured to resonate at a second frequency which is a non-harmonic of the first frequency and being connected to the first rectangular planar radiation element through a first planar conductive body formed on the first planar surface of the support, wherein said second frequency is not an integer multiple of said first frequency, the first planar conductive body formed in a plane orthogonal to the respective planes of the first and the second rectangular radiation elements and the first single feed point;
a first shorting element adjacent the first feed point and extending from the first planar conductive body; and

a second antenna disposed at the second corner of the support and configured to have:
a second single feed point, being a singular feed point of the second antenna, the first single feed point formed on a first side surface of the second pair of side surfaces;
a third rectangular planar radiation element formed on a second side surface of the second pair of the side surfaces of the support in a plane substantially orthogonal to the second feed point and configured to resonate at the first frequency, the third rectangular planar radiation element spaced from said second corner; and
a fourth rectangular radiation element configured to form a corner at the second corner of the support, a third rectangular portion of the fourth rectangular radiation element spaced from, and coplanar with the third rectangular planar radiation element, a remaining fourth rectangular portion substantially orthogonal to said third rectangular portion and substantially coplanar with the plane of the second feed point, the fourth radiation element configured to resonate at the second frequency and connected to the third radiation element through a second planar conductive body formed on the first planar surface of the support, the second planar conductive body formed in a plane orthogonal to the respective planes of the third and the fourth rectangular radiation elements and the second single feed point; and
a second shorting element adjacent the second feed point and extending from the second planar conductive body.

2. The wireless communication device of claim 1 , wherein said first antenna is configured to transmit and receive communication signals simultaneously on both said first frequency and said second frequency.

3. The wireless communication device of claim 1 , wherein said first radiation element is proximate to a ground plane and the first frequency of said first radiation element is configured by a first electrical coupling between said first element and said ground plane.

4. The wireless communication device of claim 3 , wherein said second radiation element is proximate to a ground plane and the second frequency of said second radiation element is configured by a second electrical coupling between said second radiation element and said ground plane.

5. The wireless communication device of claim 1 , wherein the first and second frequencies of said first and second radiation elements are configured independently.

6. The wireless communication device of claim 5 , wherein the first resonance frequency is 700 MHz and the second resonance frequency is 2600 MHz.

7. A wireless device, comprising:
a support having:
a first planar surface in a first plane and a second planar surface in a second plane between which extend a plurality of planar side surfaces, each in a respective plane, the second planar surface spaced from the first planar surface;
a first corner formed by an abutment of the first planar surface and a first pair of the plurality of side surfaces; and
a second corner formed by an abutment of the first planar surface and a second pair of side surfaces, where at least one of the side surfaces of the second pair is different to the first pair;

first and second dual-band antennas formed on said support at respectively different ones of the first and second corners of the support, each of said first and second dual band antennas comprising:
a single feed point, being a singular feed point of the antenna, the first single feed point formed on one of the side surfaces;
a first rectangular planar radiation element formed on a respectively different side surface than the one of the side surfaces of the support and being in a plane substantially orthogonal to a plane of the single feed point and configured to transmit and receive communication signals at a first frequency; and
a second rectangular radiation element configured to form a corner at one of the respective first and second corners of the support, a first rectangular portion of the second rectangular radiation element spaced from, and coplanar with the first rectangular planar radiation element, a remaining second rectangular portion substantially orthogonal to said first rectangular portion and substantially coplanar with the plane of the first feed point, the second planar radiation element being configured to transmit and receive communication signals at a second frequency, wherein said second frequency is not an integer multiple of said first frequency and the second planar radiation element connected to the first planar radiation element through a conductive body disposed on said surface of the antenna supporter, the planar conductive body formed in a plane orthogonal to the respective planes of the first and the second planar radiation elements and the single feed point;

a shorting element adjacent the feed point and extending from the planar conductive body and
processing logic configured to control said first and second dual band antennas to transmit and receive communication signals at said first frequency and said second frequency.

8. The wireless device of claim 7 , wherein said first and second dual-band antennas are each configured to transmit and receive communication signals simultaneously on both said first frequency and said second frequency.

9. The wireless device of claim 7 , wherein said first an

Assignees

• Wang Dong
• Warden James Paul
• Blackberry Ltd

Inventors

• Wang Dong
• Warden James Paul

Classifications

• H01Q1/38

  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 title

• H01Q21/30

  Combinations of separate antenna units operating in different wavebands and connected to a common feeder system · CPC title

• H01Q1/243 Primary

  with built-in antennas · CPC title

• H01Q9/0407

  Substantially flat resonant element parallel to ground plane, e.g. patch antenna (dipole H01Q9/285; monopole H01Q9/40) · CPC title

• H01Q5/371

  Branching current paths · CPC title