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Patch antenna with metallic wall

A patch antenna, metal wall technology, applied to antennas, resonant antennas, antenna components, etc., can solve problems such as unfavorable, directional mismatch, small size, etc.

Inactive Publication Date: 2010-03-03
NEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the dipole antenna has a relatively large shape, and thus is disadvantageous from the viewpoint of smaller size and lower cost
Furthermore, dipole antennas suffer from a problem in which the directivity in the horizontal plane of the antenna for vertically polarized waves and the directivity in the horizontal plane of the antenna for horizontally polarized waves do not match

Method used

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  • Patch antenna with metallic wall
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Examples

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Embodiment Construction

[0041] The patch antenna for linearly polarized waves of the present invention is provided with: a patch antenna element formed on a dielectric substrate and configured to allow transmission and reception of linearly polarized waves; and a metal wall provided on the patch antenna The outer periphery of the element is inclined inwardly to reduce the radiation opening size of the antenna.

[0042] The metal wall of the patch antenna for linearly polarized waves of the present invention can be constructed of a substantially rectangular metal plate that supports the entire rear surface of the dielectric substrate and includes a curved portion that is bent forward to narrow the spacing between the ends of the metal walls at both ends parallel to the polarization plane of the linearly polarized wave.

[0043] A configuration may be employed in which the bent portion is formed as a bent portion inclined toward the dielectric substrate. Alternatively, a configuration may be employed ...

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Abstract

A patch antenna is provided with a metallic wall (1); a patch conductor (4) formed on a printed board (2), i.e., a dielectric substrate, by etching or the like; and a power feeding means for the patchconductor. The metallic wall (1) is bent forward along the both side surfaces of the printed board (2). The metallic wall (1) is inclined inward, and an interval between the both end portions is smaller than a radiation aperture dimension of the patch antenna when viewed from an antenna radiation direction. With such configuration, a directional beam width can be widened, and the directional beamwidth on a surface parallel to the polarization surface of linearly-polarized wave and the directional beam width on a surface orthogonally intersecting with the polarization surface of the linearly-polarized wave are accorded with each other.

Description

technical field [0001] The present invention relates to a patch antenna, and more particularly, to a patch antenna mainly used in a base station of a wireless system requiring a plurality of antenna elements such as diversity and MIMO (Multiple Input Multiple Output). Background technique [0002] In systems employing WiMAX (Worldwide Interoperability for Microwave Access) technology or next-generation portable phone systems, MIMO technology and diversity technology are generally used, and smaller antennas and lower costs are required. MIMO systems require multiple antennas, and antennas characterized by little cross-correlation over a small range have thus become essential. [0003] In order to meet this need, a dual-polarized antenna that can be used for both vertically polarized waves and horizontally polarized waves is sought. Furthermore, an antenna configuration is sought in which the width of the directional beam matches the vertically polarized wave and the horizont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q13/08H01Q15/18H01Q21/24
CPCH01Q9/0407H01Q19/106H01Q1/246
Inventor 游佐宏行
Owner NEC CORP