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:
May. 09, 1989
Filed:
Aug. 04, 1987
Katsuya Tsukamoto, Kadoma, JP;
Yasuhiro Fujii, Kadoma, JP;
Yasumasa Ogawa, Kadoma, JP;
Sadaaki Kondo, Kadoma, JP;
Kyoji Masamoto, Kadoma, JP;
Masakatsu Niwa, Kadoma, JP;
Masayuki Matsuo, Kadoma, JP;
Yoshihiro Kitsuda, Kadoma, JP;
Hajime Takeda, Kadoma, JP;
Shoji Miyanari, Kadoma, JP;
Hiroshi Yokota, Kadoma, JP;
Shuji Taniguchi, Kadoma, JP;
Matsushita Electric Works, Ltd., Osaka, JP;
Abstract
A plane antenna comprises a power-supply circuit, a radiator circuit and an earthing conductor which are stacked respectively with a dielectric layer interposed between them, in which the power-supply and radiator circuits are made independent of each other as electromagnetically coupled to each other and at least one of the dielectric layers is formed with a foamed resin, whereby insertion loss can be reduced to remarkably improve the antenna characteristics. Only with the interposition of the foamed resin dielectric layer or layers, an effective separation is achieved between at least the power-supply circuit and the earthing conductor or the power-supply circuit and the radiator circuit, for a large extent improvement in the assembling ability.