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. 14, 2001
Filed:
Jul. 15, 1999
Hardial Gill, Backnang, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
The double-balanced mixer includes a diode ring (D,D,D,D,) with respective balancing circuit portions for a local oscillator signal (LO) and a high frequency signal (RF) and a capacitively-loaded conductor branch (L,L,) for an intermediate frequency signal (IF). In order to minimize conversion losses and obtain a high isolation between the local oscillator signal (LO) and the high frequency signal (RF), each balancing circuit portion comprises a first coupler including two strip lines (L,L,L,L,) and a second coupler constructed as an interdigital coupler (L,L,L,L,L,L,L,L,). The first coupler (L,L,L,L,) of each balancing circuit portion is connected to a respective first symmetric input (,) of the diode ring and the second coupler is connected with a respective second symmetric input of the diode ring. Both couplers are connected with each other via one of their gates (,). Two other gates (,) of each first coupler (L,L,L,L,) form asymmetric inputs for either the local oscillator signal (LO) or the high frequency signal (RF).