Abstract: The invention relates to a filter arrangement for separating radio frequency energy from signal energy in a signal line. The signal line extends at least partly in a first layer of a multi-layer printed circuit board. A grounded surface is arranged in a second layer of the printed circuit board. The signal line to be filtered is interrupted in the first layer in the filter region and continued in a third layer, the second and the third layers being located on opposite sides of the first layer. Due to the skin effect the radio frequency energy will be concentrated on the side of the signal line facing the grounded surface. The side of the signal line remote from the grounded surface is then to a large extent decoupled from radio frequency energy, such that the actual signal path can be continued without being disturbed by radio frequency energy.
Type:
Grant
Filed:
March 20, 2001
Date of Patent:
November 18, 2003
Assignee:
Diehl Avionik GmbH
Inventors:
Bruno Gerstenberg, Hans-Joachim Michling, Helmut Messmer
Abstract: The invention relates to a filter arrangement for separating radio frequency energy from signal energy in a signal line. The signal line extends at least partly in a first layer of a multi-layer printed circuit board. A grounded surface is arranged in a second layer of the printed circuit board. The signal line to be filtered is interrupted in the first layer in the filter region and continued in a third layer, the second and the third layers being located on opposite sides of the first layer. Due to the skin effect the radio frequency energy will be concentrated on the side of the signal line facing the grounded surface. The side of the signal line remote from the grounded surface is then to a large extent decoupled from radio frequency energy, such that the actual signal path can be continued without being disturbed by radio frequency energy.
Type:
Application
Filed:
March 20, 2001
Publication date:
September 27, 2001
Applicant:
Diehl Avionik GmbH
Inventors:
Bruno Gerstenberg, Hans-Joachim Michling, Helmut Messmer