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:
Mar. 30, 2004
Filed:
Oct. 11, 2000
Thomas Keller, Freising, DE;
Manfred Plankensteiner, Germering, DE;
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
In a circuit assembly for producing a one-way connection between a first transmitter or receiver ( ) operating on a first frequency and an antenna ( ), on the one hand, as well as between a second transmitter or receiver ( ) operating on a second frequency and the antenna ( ) on the other, each transmitter or receiver having a port for producing a connection to the antenna ( ) a filter ( ) is used having at least one symmetrical port, the passband of which covers the first and the second frequency, whereby the antenna ( ) is connected to one of the ports of the filter ( ). A first passive network ( ) between one lead of the at least one symmetrical port of the filter ( ) and the input of the first transmitter or receiver ( ) short-circuits at the second frequency the port ( ) of the first transmitter or receiver ( ). A second passive network ( ) between the other lead of the at least one symmetrical port of the filter ( ) and the port ( ) of the second transmitter or receiver ( ) short-circuits the port ( ) of the second transmitter or receiver ( ) at the first frequency.