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:
Oct. 13, 1998
Filed:
Jul. 17, 1996
Antero Lehtola, Turku, FI;
Nokia Mobile Phones, Ltd., Salo, FI;
Abstract
The present invention concerns an apparatus for connecting a radio frequency signal between the integral antenna of the radio communication device and the external antenna, preferably a car antenna. The apparatus in accordance with the invention comprises a resonant element, preferably a helical coil conductor having an electromagnetic coupling with the antenna of the radio communication device and its first connection point being coupled capacitatively with the ground plane of the radio communication device and its second connection point being connected with a coaxial conductor to said external antenna. The apparatus in accordance with the invention further comprises a matching element, preferably a helical coil conductor coupled electromagnetically to said antenna and said resonant element.