Title:
ANTENNA DEVICE
Document Type and Number:
WIPO Patent Application WO/2013/031396
Kind Code:
A1
Abstract:
An antenna device, comprising: a reflective mirror that cuts out part of a paraboloid of revolution and forms an offset antenna; and a primary emitter that emits an elliptical cone-shaped elliptical beam to the opening surface of the reflective mirror. The border of the opening surface of the reflective mirror is formed in an elliptical shape along the isolux line of the elliptical beam emitted from the primary emitter. As a result, the reflective mirror border of this embodiment compensates for loss caused by reflective mirror spillover, in a region jutting out from a virtual, elliptical general reflective mirror border, formed so as to be orthogonal to the axis of the beam incident to the opening surface of the reflective mirror. Reduction in illumination efficiency of the reflective mirror is compensated for in the region wherein the general reflective mirror border juts out further than the reflective mirror border of this embodiment.
Inventors:
TANABE KOSUKE (JP)
Application Number:
PCT/JP2012/068106
Publication Date:
March 07, 2013
Filing Date:
July 17, 2012
Export Citation:
Assignee:
NEC CORP (JP)
TANABE KOSUKE (JP)
TANABE KOSUKE (JP)
International Classes:
H01Q19/13; H01Q15/16
Foreign References:
| JPS5479542A | 1979-06-25 | |||
| JPS5261458A | 1977-05-20 | |||
| JPS61169004A | 1986-07-30 | |||
| JPH03145806A | 1991-06-21 | |||
| JP2592646B2 | 1997-03-19 | |||
| JPH0951211A | 1997-02-18 |
Other References:
KATSUHIKO AOKIO ET AL.: "B-II, Communication 11-Wireless Communication and Wireless Application", vol. J81-B-2, 25 August 1998, THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS, article "Method of Realizing Low Side Lobe Characteristic of Offset Elliptical Beam Antenna", pages: 789 - 796
See also references of EP 2750250A4
See also references of EP 2750250A4
Attorney, Agent or Firm:
TANAI Sumio et al. (JP)
Sumio Tanai (JP)
Sumio Tanai (JP)
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Claims: