US 7,352,327 B2 · Wireless apparatus capable of controlling radiation patterns of antenna

Abstract

A wireless apparatus capable of controlling radiation patterns and directions of antenna is provided. It comprises an antenna element, a ground plane, an antenna feed-point, and at least one slot or slit formed on the ground plane. The inclusion of such slots or slits in the wireless apparatus improves the radiation directivity of antenna, and greatly enhances the antenna gain on the horizontal plane. It also resolves the problems caused by shift of radiation patterns of antenna and the poor antenna gains for a conventional antenna apparatus. The wireless apparatus of the present invention has the advantages of simple structure and easy fabrication. The invention can be applied to various kinds of antennas, such as monopole antenna, shorted-monopole antenna, dipole antenna, loop antenna, and planar inverted-F antenna, etc.

Claims11

Dependent claims

A wireless apparatus capable of controlling the radiation patterns of antenna, comprising:

an antenna element having a ground connection point and an operating wavelength;
a ground plane having a distribution of positive and negative currents, said ground connection point being connected to said ground plane;
an antenna feed-point;
and
at least one ground plane negative current suppressing slot or slit formed on said ground plane for controlling an angle of maximum radiation of said antenna element, wherein said antenna element and said ground plane are connected to said antenna feed-point.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

11/221,148Filed 7 Sep 2005

Priority

TW 94114506 A5 May 2005

Published

US 2006/0250310 A19 Nov 2006

Granted

1 Apr 2008

Term ends

Not estimatedThe source records don’t support an estimate.

Classification6 codes

H01Q 1/243
Specially adapted for hand-held use: with built-in antennas
H01Q 1/48
Details of, or arrangements associated with, antennas: earthing means; Earth screens; Counterpoises
H01Q 9/16
Resonant antennas: with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
H01Q 9/30
Resonant antennas: with feed to end of elongated active element, e.g. unipole

Wireless apparatus capable of controlling radiation patterns of antenna

Life of this patent

Wireless apparatus capable of controlling radiation patterns of antenna

Life of this patent

Abstract

Claims11