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Title: A Container For Electrical Noise: Ultraguard Theory And Practice
Author: Karl Anderson
Source: 2000 Measurement Science Conference
Year Published: 2000
Abstract: A theory for active containment of electrical noise within a region is presented. A technique called the ultraguard, based on this theory, is presented and experimentally verified. The ultraguard is demonstrated to prohibit undesired charge flow in a signal-carrying conductor from arising due to noise signals that develop between a regions conductive boundary and a signal-carrying conductor passing through the region. The technique is experimentally demonstrated to operate despite distributed and randomly varying impedance between the signal conductor and the conductive region boundary. The region can be volumetric (i.e. within the shield of a signal cable or within an enclosure surrounding a system or subsystem) semivolumetric (i.e. within a partially-open container) or planar (i.e. within a conductive boundary such as a guard ring or channel on a printed circuit board surface).

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