Patent · US Expired

Millimeter-wave multiplexers

US4902992A · kind A · utility

33Cited by

6References

10Claims

0Family size

Assignee

United States of America as represented by the Secretary of the Air Force · US

Inventors

David Rubin · San Diego, US
Kurt Reinke · Bielefeld, DE

Key dates

Filing date	Mar 29, 1988
Grant date	Feb 20, 1990
Priority date	—
Expiry date	Mar 29, 2008

Classification

Technology area (CPC H)Electricity
CPC primaryH01P1/2135
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

Abstract

A planar millimeter wave circuit for splitting a very wide input frequency and into three or more lesser bands utilizes bandpass filters exclusively. A triplexer is made by connecting the bandpass filters with coupled line equivalents fed by a conductor with a characteristic impedance the same as the input conductor to the filters and of an appropriate length so as to make the diplexer appear open or nearly open circuited over the adjacent frequency range of a third bandpass filter used in the triplexer or, alternatively, over the adjacent frequency range of a second diplexer connected so as to form a quadruplexer.

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