Patent · US Active

Antenna duplexer with high GPS suppression

US8981872B2 · kind B2 · utility

1Cited by

9References

25Claims

0Family size

Assignee

EPCOS AG · DE

Inventors

Helmut Klamm · Munich, DE
Peter Selmeier · Haag in Oberbayern, DE

Key dates

Filing date	Oct 15, 2009
Grant date	Mar 17, 2015
Priority date	—
Expiry date	Jul 14, 2032

Classification

Technology area (CPC H)Electricity
CPC primaryH03H9/725
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

An antenna duplexer includes a transmission filter which operates in a transmission frequency band and has a transmission filter output. A reception filter operates in a reception frequency band and has a reception filter output. An antenna connection is connected to the transmission filter output and a matching element is connected between the antenna connection and the reception filter input. The circuit formed from the transmission filter, reception filter and matching element attenuates transmission signals in a frequency band whose frequencies f are in the interval 0.50*f0<=f<=0.75*f0, where f0 is the mid-frequency of the reception frequency band.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.