Patents
Common mode filtering method and device
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Patent Number
US 7,932,793 B2
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Inventor
T.-L. Wu, and S.-J. Wu
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Time
Apr 01,2011
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Abstract
Provided are common mode filtering method and device for use with a defected ground structure, the device including a substrate, coupled microstrip lines formed on the substrate and a ground plane formed underneath the substrate, the common mode filtering method being characterized by forming at least a defected ground structure on the ground plane and making dual mode signals pass through the coupled microstrip lines, thereby using the defected ground structure to suppress dual model noises within a specific frequency band and prevent signal distortion.