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:
Sep. 21, 2004
Filed:
Mar. 19, 2001
Applicant:
Inventors:
Thomas Fickenscher, Hamburg, DE;
Roland Jenkins, Wesel, DE;
Assignee:
Siemens Aktiengesellschaft, Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04M 1/00 ;
U.S. Cl.
CPC ...
H04M 1/00 ;
Abstract
A multiband antenna switch is disclosed in which a matching pad ( ) effects an open-circuit operation of the receiving branch at a circuit node (A) with respect to at least one higher-frequency useful-frequency band and the matching pad ( ) and a filtering device ( ) are tuned to one another in such a manner that, in the transmit case, a non-resistive component of an input impedance of the matching pad ( ) is essentially compensated for at the circuit node (A) with respect to at least one lower-frequency useful-frequency band.