Sector beam antenna with scattering component

• US 6,323,816 B1
• Filed: 10/17/2000
• Issued: 11/27/2001
• Est. Priority Date: 10/19/1999
• Status: Expired due to Term

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Omuro, Norihiko
• Primary Examiner(s): LE, HOANGANH T
• Application Number:
  US09/690,659
• Time in Patent Office: 406 Days
• Field of Search: H01/Q 1.300, 343/780, 343/772, 343/775, 343/783, 343/786
• US Class Current: 343/780
• CPC Class Codes: H01Q 13/28 comprising elements constituting electric discontinuities and spaced in direction of wave propagation, e.g. dielectric elements or conductive elements forming artificial dielectric
• CPC Class Codes: H01Q 17/001 for modifying the directional characteristic of an aerial
• CPC Class Codes: H01Q 19/185 wherein the surfaces are plane
• CPC Class Codes: H01Q 19/28 using a secondary device in the form of two or more substantially straight conductive elements log- periodic antennas H01Q11/10; constituting a reflecting surface H01Q19/10
• CPC Class Codes: H01Q 3/14 for varying the relative position of primary active element and a refracting or diffracting device

Abstract

A sector beam antenna with a scattering component, in which a desired radiation pattern can be obtained, is provided. The sector beam antenna with the scattering component provides parallel plates composed of two conductive plates disposed in parallel in which the distance between the parallel plates is longer than a half wavelength and shorter than one wavelength of a using wavelength, a primary radiator block having an H bend function disposed between the parallel plates, an input port opened at one of the parallel plates in order to supply power to the primary radiator block, and a scattering component made of a conductive material and disposed in parallel to an aperture being an opening end of the parallel plates in a state that a designated distance exists between the scattering component and the aperture. With this structure, the radiation pattern radiating from the aperture can be formed freely.

Claims

1. A sector beam antenna with a scattering component, which forms a sector beam, comprising:

parallel plates composed of two conductive plates disposed in parallel in which the distance between said parallel plates is longer than a half wavelength and shorter than one wavelength of a using wavelength;

a primary radiator block having an H bend function disposed between said parallel plates;

an input port opened at one of said parallel plates in order to supply power to said primary radiator block; and

a scattering component made of a conductive material and disposed in parallel to an aperture being an opening end of said parallel plates in a state that a designated distance exists between said scattering component and said aperture.

2. A sector beam antenna with a scattering component, which forms a sector beam, in accordance with claim 1, wherein:

said scattering component is made of a thin pole shaped conductive material or a thin plate shaped conductive material.

3. A sector beam antenna with a scattering component, which forms a sector beam, in accordance with claim 1, further comprising:

scattering component fixing components for fixing said scattering component to said parallel plates;

flares for forming a beam; and

radio wave absorbing materials for absorbing a part of a radio wave disposed at the ends and inside bent surfaces of said flares.

4. A sector beam antenna with a scattering component, which forms a sector beam, in accordance with claim 1, wherein:

a radio wave, in which the electric field of said radio wave is parallel to said parallel plates, is generated.

5. A sector beam antenna with a scattering component, which forms a sector beam, in accordance with claim 1, further comprising:

a reflection block for making phases of beams radiating from said aperture equal or for making phases of beams radiating from said aperture not equal at the upper part and the lower part of said aperture.

6. A sector beam antenna with a scattering component, which forms a sector beam, in accordance with claim 5, wherein:

said reflection block has a parabolic shape or a shape combined plural curve surfaces.