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:
Nov. 25, 2003
Filed:
Apr. 05, 2001
Mareike Katharine Klee, Hueckelhoven, DE;
Robert Frederick Milsom, Redhill, GB;
Hans Peter Löbl, Monschau-Imgenbroich, DE;
Rainer Kiewitt, Roetgen, DE;
Uwe Mackens, Aachen, DE;
Martinus Hermanus Wilhemus Maria Van Delden, Eindhoven, NL;
Wilhelm Georg Hermann, Roetgen, DE;
Olaf Wunnicke, Warburg, DE;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
The invention describes a tunable filter arrangement with at least two resonators which are coupled to one another and of which at least one is connected to a capacitor with tunable capacitance. The electrical properties of the resonator, and thus the overall filter characteristic, can be changed through a change in the capacitance of the capacitor. Furthermore, a transmitter, a receiver, a mobile telephone device, and a wireless data transmission system comprising such a filter arrangement are disclosed, as is a tunable bulk acoustic wave resonator.