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:
Jun. 25, 2013
Filed:
Apr. 14, 2008
Zlatoljub Milosavljevic, Kempele, FI;
Anne Isohätälä-lehmikangas, Kello, FI;
Jyrki Mikkola, Evijärvi, FI;
Zlatoljub Milosavljevic, Kempele, FI;
Anne Isohätälä-Lehmikangas, Kello, FI;
Jyrki Mikkola, Evijärvi, FI;
Pulse Finland Oy, Kempele, FI;
Abstract
An adjustable monopole antenna especially intended for the mobile terminals. The adjusting circuit () of the antenna is located between the radiator () and the antenna port of a radio device and forms, together with the antenna feed conductor (), a feed circuit. This circuit comprises an adjustable reactance between the feed conductor and the ground in series with the feed conductor or in both of those places. For example, the feed conductor can be connected by a multi-way switch to one of alternative transmission lines, which are typically short-circuited or open at their tail end and shorter than the quarter wave, each line acting for a certain reactance. The antenna operating band covers at a time only a part of the frequency range used by one or two radio systems, in which case the antenna matching is easier to arrange than of a real broadband antenna. The space required for both the radiator and the adjusting circuit is relatively small. There is no need to arrange a coupling to the radiator for the antenna adjusting, which means a simpler antenna structure and thus savings in production costs.