Patent · US Expired

Planar filter having an overcoupling stripline an integral multiple of a half wavelength in length

US5648747A · kind A · utility

9Cited by

2References

7Claims

0Family size

Inventors

Wolfgang Grothe · Reutlingen, DE
Matthias Klauda · Erlangen, DE
Stefan Mueller · Villingen, DE
Claus Schmidt · Regensburg, DE

Key dates

Filing date	Feb 6, 1996
Grant date	Jul 15, 1997
Priority date	—
Expiry date	Feb 6, 2016

Classification

Technology area (CPC H)Electricity
CPC primaryH01P1/20381
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

Abstract

A planar filter is proposed in which a plurality of striplines arranged next to one another on a substrate are supplemented by an overcoupling stripline which couples to one another two striplines which are not immediately neighboring. The length of the overcoupling stripline is an integral multiple of a half wavelength of the center frequency of the filter.

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