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. 17, 2013
Filed:
Oct. 28, 2009
Pentti Immonen, Espoo, FI;
Jarno Tervo, Helsinki, FR;
Pentti Immonen, Espoo, FI;
Jarno Tervo, Helsinki, FR;
Tellabs Oy, Espoo, FI;
Abstract
In a filter structure for suppressing a spurious signal, a conductor layer in a printed circuit board includes a pattern with interconnected pattern elements (to). A pattern element includes a low-impedance conductive region () the capacitance of which against a second conductor layer of the printed circuit board is dominant over the inductance. A pattern element includes at least two adjacent high-impedance conductor strips () in a first direction, connected to a low-impedance conductive region, and at least two adjacent high-impedance conductor strips () in a second direction, connected to the low-impedance conductive region. The inductance of each high-impedance conductor strips is dominant over the capacitance against the second conductor layer. The high-impedance conductor strips form together with the low-impedance conductive region a plurality of resonance points in the frequency range, thus achieving sufficient stop-band width.