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:
Aug. 27, 2002
Filed:
Jul. 07, 2000
David Westberg, Uppsala, SE;
Telefonaktiebolaget L M Ericsson (publ), Stockholm, SE;
Abstract
The present invention relates to a balun circuit that includes means for transforming a balanced input signal to an unbalanced signal and impedance changing means. The means for transforming the balun input signal to an unbalanced output signal is a &lgr;/2-waveguide ( ). A first side of the &lgr;/2-waveguide ( ) is connected to a second port (P ) of the balun circuit, while a second side of said &lgr;/2-waveguide ( ) is connected to a third port (P ) of the balun circuit. The impedance changing means is a &lgr;/4-waveguide ( ) of which a first side is connected to a second side of the &lgr;/2-waveguide ( ) and a second side is connected to the first port (P ) of the balun circuit.