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. 11, 1990
Filed:
Oct. 13, 1989
Erkki O Niiranen, SF-91100-Ii, FI;
LK-Products Oy, Kempele, FI;
Abstract
The invention relates to a resonator structure comprising a printed board of an insulating material; a helix resonator mounted on the printed board, the helix resonator being formed by a wire wound into a cylindrical coil with a number of turns, one of the turns comprising a straight portion bent in parallel with the surface of the printed board; and a casing surrounding the helix resonator and having at least an inner and outer surface made of an electrically conductive material. In order to improve the reproduction fidelity of the matching of the helix resonator in series production, the resonator structure according to the invention is characterized in that a micro strip conductor is provided on the surface of the printed board, the microstrip being electrically connected to a predetermined position on said straight portion.