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:
Sep. 02, 2003
Filed:
Apr. 15, 2002
Yuichi Kushihi, Kanazawa, JP;
Junichi Kurita, Ishikawa-ken, JP;
Murata Manufacturing Co., Ltd., Kyoto, JP;
Abstract
An antenna structure includes a surface-mounted antenna which has a base member. A radiating electrode and an antenna-side control electrode are disposed on the base member. A capacitance is generated between the antenna-side control electrode and an open end of the radiating electrode, and the antenna-side control electrode electrically floats. A board-side control electrode which is electrically connected with the antenna-side control electrode and which electrically floats is disposed on a mounting board. The board-side control electrode is connected with a ground conductor at high frequencies through a resonant frequency adjuster. The resonant frequency adjuster has a capacitance or an inductance. By changing the capacitance or the inductance, the resonant frequency of the radiating electrode can be changed without changing the surface-mounted antenna.