RADIO FREQUENCY EMISSION PATTERN SHAPING

• US 20130207865A1
• Filed: 02/14/2012
• Published: 08/15/2013
• Est. Priority Date: 02/14/2012
• Status: Active Grant

• Current Assignee: ARRIS Enterprises LLC (CommScope Holding Company, Inc.)
• Original Assignee: Ruckus Wireless, Inc. (CommScope Holding Company, Inc.)
• Inventors: Shtrom, Victor, Baron, Bernard, Ling, Chia Ching
• Granted Patent: US 9,634,403 B2
• Time in Patent Office: Days
• US Class Current: 343/833
• CPC Class Codes: H01Q 19/10 using reflecting surfaces
• CPC Class Codes: H01Q 21/28 Combinations of substantially independent non-interacting antenna units or systems multiple beam H01Q25/00
• CPC Class Codes: H01Q 21/29 Combinations of different interacting antenna units for giving a desired directional characteristic H01Q25/00 takes precedence
• CPC Class Codes: H01Q 3/24 varying the orientation by switching energy from one active radiating element to another, e.g. for beam switching
• CPC Class Codes: H04B 7/0413 MIMO systems

Abstract

Pattern shaping elements shape a radiation pattern generated by one or more antennas. A MIMO antenna system generates an omnidirectional radiation pattern. One or more pattern shaping elements may include metal objects which act as directors or reflectors to shape the radiation pattern. The shaping may be controlled by selectively coupling the pattern shaping elements to a ground plane, thus making them appear transparent to the radiation pattern. The pattern shaping elements may be amorphous, have varying shape, and may be symmetrical or asymmetrical. Different configurations of selected pattern shaping elements may provide different shapes for a radiation pattern.

Claims

1. A wireless device, comprising:

an antenna array including a plurality of antenna elements that generate a substantially omnidirectional radiation pattern;

a plurality of pattern shaping elements; and

a plurality of connecting elements, each of the plurality of connecting elements connecting one or more of the plurality of pattern shaping elements to ground, at least one of the plurality of pattern shaping elements connected to ground via a corresponding connecting element, the connection to ground causing a change in the shape of the otherwise substantially omnidirectional radiation pattern generated by the antenna array.

2. The wireless device of claim 1, wherein each of the plurality of a pattern shaping elements has a non-symmetrical shape.

3. The wireless device of claim 1, wherein the plurality of a pattern shaping elements includes a director.

4. The wireless device of claim 1, wherein the plurality of a pattern shaping elements includes a reflector.

5. The wireless device of claim 1, wherein one or more of the plurality of connecting elements are mounted on an outer surface of a printed circuit board.

6. The wireless device of claim 1, wherein each of the plurality of connecting elements includes a tab, the tab extending into a printed circuit board.

7. The wireless device of claim 1, wherein the substantially omnidirectional radiation pattern is substantially in the plane of the horizontal antenna array

8. The wireless device of claim 1, wherein two or more of the plurality of antenna elements are selectively coupled to a radio frequency feed port to generate a substantially omnidirectional radiation pattern.

9. The wireless device of claim 1, further comprising a controller that selects the plurality of antenna elements that act as reflectors and directors.