Reflection mirror antenna device

Patent metadata

Field	Value
Publication number	US-10797401-B2
Application number	US-201616342765-A
Country	US
Kind code	B2
Filing date	Dec 13, 2016
Priority date	Dec 13, 2016
Publication date	Oct 6, 2020
Grant date	Oct 6, 2020

Abstract

A first region of a reflection mirror including a center point of the paraboloid of revolution is formed of a conductor. A second region, which is an outer peripheral side of the first region, of the reflection mirror is a region where a plurality of reflection elements, which are conductor patterns, is arranged on a dielectric body overlaid on a base plate conductor. An arrangement pitch of the plurality of reflection elements corresponds to a wavelength of a radio wave in the second frequency band.

First claim

The invention claimed is:

1. A reflection mirror antenna device comprising:
at least one primary radiator radiating a radio wave in a first frequency band and a radio wave in a second frequency band higher than the first frequency band; and
a reflection mirror having a surface of a paraboloid of revolution reflecting radio waves in the first and second frequency bands radiated from the at least one primary radiator,
wherein a first region of the reflection mirror including a center point of the paraboloid of revolution is formed of a conductor,
a second region, which is an outer peripheral side of the first region, of the reflection mirror is a region where a plurality of reflection elements, which are conductor patterns, is arranged on a dielectric body overlaid on a base plate conductor,
an arrangement pitch of the plurality of reflection elements corresponds to a wavelength of a radio wave in the second frequency band,
the plurality of reflection elements arranged in the second region cause phase difference between a reflection phase of a radio wave on the first region and a reflection phase of a radio wave on the second region, and
the phase difference between a reflection phase of a radio wave at the center point included in the first region and a reflection phase of a radio wave on the second region is in a range between 90 and 180 degrees.

2. The reflection mirror antenna device according to claim 1 , wherein each of the plurality of reflection elements has a circular ring shape.

3. The reflection mirror antenna device according to claim 1 , wherein each of the plurality of reflection elements has a rectangular ring shape.

4. The reflection mirror antenna device according to claim 1 , wherein the at least one primary radiator comprises a plurality of primary radiators,
wherein the reflection mirror has the surface of the paraboloid of revolution reflecting radio waves radiated from the plurality of primary radiators, respectively.

Assignees

• Mitsubishi Electric Corp

Inventors

• Takikawa Michio
• Yamamoto Shinichi
• Tomura Takashi
• Inasawa Yoshio

Classifications

• H01Q19/13 Primary

  the primary radiating source being a single radiating element, e.g. a dipole, a slot, a waveguide termination (H01Q19/15 takes precedence) · CPC title

• H01Q5/45

  using two or more feeds in association with a common reflecting, diffracting or refracting device · CPC title

• H01Q5/28

  Arrangements for establishing polarisation or beam width over two or more different wavebands · CPC title

• H01Q19/17

  the primary radiating source comprising two or more radiating elements (H01Q19/15, H01Q25/00 take precedence) · CPC title

• H01Q15/0013

  said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective · CPC title