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:
Nov. 22, 1994
Filed:
Nov. 09, 1992
Yoshimi Egashira, Tokyo, JP;
Hai Xu, Tokyo, JP;
Harada Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
The antenna of the present invention includes an ultrashort antenna element which has an electrical length of lambda/2, a transmission path one end of which is connected to the base of the antenna element, a ground plane obtained from a sheet-form conductive member with an electrical length of lambda/4 which is bent into a U-shape so that first and second portions face each other with the first portion being installed parallel to the transmission path in close proximity to the transmission path so as to create a capacitive coupling with the transmission path, a capacitive coupling member installed at one end of the first portion so that a capacitive coupling is formed between the capacitive coupling member and ground and a coaxial cable with its central conductor connected to an other end of the transmission path and its outer conductor connected to one end of the second portion of the ground plane.