US 7,088,306 B2 · High gain antenna for wireless applications

Abstract

An antenna includes a ground plane and an active antenna element adjacent the ground plane. Passive antenna elements are adjacent the ground plane, and are spaced apart from the active antenna element. First parasitic gratings are adjacent the ground plane and are spaced apart from the active antenna element. Each first parasitic grating is between two adjacent passive antenna elements. A controller selectably controls the passive antenna elements for operating in a reflective mode or a directive mode. The controller includes for each respective passive antenna element at least one impedance element connected to the ground plane, and a switch adjacent the ground plane for connecting the at least one impedance element to the passive antenna element so that the passive antenna element operates in the reflective or directive mode.

Claims22

Dependent claims

An antenna comprising:

a ground plane;
an active antenna element adjacent said ground plane;
a plurality of passive antenna elements adjacent said ground plane and spaced apart from said active antenna element;
a plurality of first parasitic gratings adjacent said ground plane and spaced apart from said active antenna element, with each first parasitic grating being between two adjacent passive antenna elements;
and
a controller for selectably controlling said plurality of passive antenna elements for operating in a reflective mode or a directive mode, said controller comprising for each respective passive antenna element
at least one impedance element connected to said ground plane, and
a switch adjacent said ground plane for connecting said at least one impedance element to said passive antenna element so that said passive antenna element operates in the reflective or directive mode.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application

11/063,118Filed 22 Feb 2005 · continuation

Priority

30 Apr 2001

Published

US 2005/0212714 A129 Sep 2005

Granted

8 Aug 2006

Term ends

Not estimatedThe source records don’t support an estimate.

Classification11 codes

H01Q 3/24
Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna…
H01Q 1/246
Used in mobile communications, e.g. GSM: specially adapted for base stations
H01Q 3/242
Varying the orientation by switching energy from one active radiating element to another, e.g. for beam switching: circumferential scanning
H01Q 3/2641
The auxiliary unit being composed of a plurality of antennas: being secundary elements, e.g. reactively steered

Family

Application09/845,133Parent of this continuation-in-part · filed 30 Apr 2001

Application10/444,322Parent of this continuation · filed 23 May 2003

US 2005/0212714 A1Pre-grant publication · published 29 Sep 2005

US 6,864,852 B2Parent of this continuation

US 6,606,057 B2Parent of this continuation-in-part

Application10/444,322Parent of this continuation-in-part

US 2002/0158798 A1Published application

US 2004/0027304 A1Published application

US 7,088,306 B2This patent

From the US filing history. Foreign family members aren’t listed.

High gain antenna for wireless applications

Life of this patent

High gain antenna for wireless applications

Life of this patent

Abstract

Claims22