Beam switching antenna system and method and apparatus for controlling the same

• US 7,973,714 B2
• Filed: 08/22/2007
• Issued: 07/05/2011
• Est. Priority Date: 09/15/2003
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation), LG Telecom Incorporated (LG Corporation)
• Original Assignee: LG Uplus Corporation (LG Corporation)
• Inventors: Lee, Hyo Jin
• Primary Examiner(s): Issing; Gregory C
• Application Number:
  US11/843,086
• Publication Number:
  US 20080030400A1
• Time in Patent Office: 1,413 Days
• Field of Search: 342/374, 343/834
• US Class Current: 342/374
• CPC Class Codes: H01Q 1/40 Radiating elements coated with or embedded in protective material
• CPC Class Codes: H01Q 19/10 using reflecting surfaces
• CPC Class Codes: H01Q 19/30 the primary active element being centre-fed and substantially straight, e.g. Yagi antenna
• CPC Class Codes: H01Q 19/32 the primary active element being end-fed and elongated
• CPC Class Codes: H01Q 25/00 Antennas or antenna systems providing at least two radiating patterns arrangements for changing or varying the orientation or the shape of the directional pattern H01Q3/00
• 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: H01Q 3/44 varying the electric or magnetic characteristics of reflecting, refracting, or diffracting devices associated with the radiating element

Abstract

A beam switching antenna method and apparatus for controlling a beam switching antenna system including an antenna element for forming a beam, at least one conductive reflector for reflecting the beam, and a ground switch for applying a reference voltage to the at least one conductive reflector, the method includes forming the beam of the antenna element, and imparting the formed beam with a predetermined beam pattern by controlling the ground switch to apply the reference voltage to at least one conductive reflector.

Claims

1. A method for controlling a beam switching antenna system including an antenna element installed at a mobile communication terminal for forming a beam, conductive reflectors for reflecting the beam, and ground switches for applying a reference voltage to the-conductive reflectors, the method comprising:

forming the beam from the antenna element surrounded by a dielectric body, the dielectric body including circumferential planar surfaces corresponding to the conductive reflectors; and

imparting the formed beam with a predetermined beam pattern by controlling the ground switches in accordance with an operational state of the mobile communication terminal,

wherein imparting the formed beam comprises;

if the operational state is a traffic mode, imparting the formed beam with a directional beam pattern by closing at least one of the ground switches to apply the reference voltage to at least one of the conductive reflectors so that the formed beam is controlled to direct away from a user of the mobile communication terminal; and

if the operational state is an idle mode, imparting the formed beam with a non-directional beam pattern by opening all of the ground switches, and

wherein the directional beam pattern is controlled in width and amplitude by selectively closing the at least one of the ground switches.

2. An apparatus for controlling a beam switching antenna system the apparatus comprising:

a beam forming element including an antenna element for forming a beam, conductive reflectors for reflecting the beam, ground switches for applying a reference voltage to the conductive reflectors and a dielectric body surrounding the antenna element and including circumferential planar surfaces corresponding to the conductive reflectors;

a signal source for supplying the antenna element with a signal to form the beam; and

a controller for controlling the ground switches in accordance with an operational state of a mobile communication terminal, thereby imparting the formed beam with a predetermined beam pattern,

wherein the controller controls the formed beam to have a directional beam pattern by closing at least one of the ground switches to apply the reference voltage to at least one of the conductive reflectors so that the formed beam is controlled to direct away from a user of the mobile communication terminal when the operational state is a traffic mode,

wherein the controller controls the formed beam to have a non-directional beam pattern by opening all of the ground switches when the operational state is an idle mode, and

wherein the directional beam pattern is controlled in width and amplitude by selectively closing the at least one of the ground switches.

3. The apparatus of claim 2, wherein each of the conductive reflectors comprises an upper conductive reflector and a lower conductive reflector.

4. The apparatus of claim 3, wherein each of the ground switches is disposed at a series connection between each of the upper conductive reflectors and the lower conductive reflectors.