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:
Apr. 11, 2006
Filed:
Mar. 18, 2003
Daxiong Ji, Brooklyn, NY (US);
Daxiong Ji, Brooklyn, NY (US);
Scientific Components Corporation, Brooklyn, NY (US);
Abstract
A double balanced mixer with improved isolation between the LO and RF frequency signals. The mixer has a local oscillator balun, an intermediate frequency balun and an RF balun. The baluns are located on inner layers of a substrate comprised of low temperature co-fired ceramic. The baluns are formed from spiral lines that form windings. The windings are coupled between adjacent layers. The local oscillator balun is connected to the intermediate frequency balun. A diode ring is connected between the RF balun and the intermediate frequency balun. The diode ring is mounted to a top layer. Several vias extend through the substrate. The vias provide an electrical connection between the baluns and the diode ring.