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:
Dec. 09, 2003
Filed:
May. 01, 2002
Masahiro Ohara, Osaka, JP;
Toyoshi Fukumura, Kyoto, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
An antenna is capable of transmitting/receiving waves in multi-ranged frequency bands, and providing high antenna gain, reliability and productivity. A radio communication apparatus uses the antenna. A feed portion is electrically connected with an antenna element portion at one end, and with radio-frequency circuitry of the apparatus at another end. A dielectric material core rod mechanically supports the antenna element portion. A dielectric material radome partially covers the antenna element and feed portion. The antenna element portion is formed from an approximately helical-shaped portion and an approximately meander-shaped portion, both of which are made from a thin-belt-shaped conductive plate and concentrically arranged on the core rod. Properly adjusting of the approximately helical-shaped and the approximately meander-shaped portions can provide impedance characteristics optimal for multi-ranged frequency bands.