The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 24, 2012
Filed:
Mar. 25, 2009
Hiroshi Kitada, Yokohama, JP;
Yukio Yamamoto, Sagamihara, JP;
Hiroshi Kitada, Yokohama, JP;
Yukio Yamamoto, Sagamihara, JP;
Murata Manufacturing Co., Ltd., Kyoto, JP;
Abstract
A measured antenna and a measuring antenna are placed inside a radio anechoic container. On the basis of an aperture size D of the measured antenna, an aperture size d of the measuring antenna, and a wavelength λ of a measurement frequency, a distance L between the measured antenna and the measuring antenna is set to a value in the range of (D+d)/(2λ) to 2(D+d)/λ. Thus, in the Fresnel region where the distance L is short, antenna characteristics of the measured antenna substantially the same as those in the Fraunhofer region where the distance L is long can be measured.