Provided herein are methods, devices, and systems that relate to electromagnetic interference (EMI) filters that, in certain embodiments, comprise: (a) a housing comprising a substantially enclosed first compartment and a substantially enclosed second compartment; (b) a first circuit card located in the first compartment of the housing that converts a signal transmitted on a conductive based medium to a signal transmitted on a non-conductive based medium; (c) a second circuit card located in the second compartment of the housing that converts a signal transmitted on a non-conductive based medium to a signal transmitted on a conductive based medium; (d) at least one non-conductive based medium that transmits a signal from the first circuit card to the second circuit card; and (e) at least one waveguide through which the non-conductive based medium passes from the first compartment to the second compartment.

The present invention includes one or more adjustment units configured to house one or more electric components that affect impedance in an output of power supply parts in a unit housing in which at least a connection portion has a predetermined shape and size; and a unit support part that is disposed inside the power supply part or between the output of the power supply part and loads and that detachably supports the adjustment unit. When impedance of a wire harness on the output side and the loads changes depending on a difference in a vehicle type, sufficient noise reduction is realized only by replacing the adjustment unit to be mounted without changing a configuration of a main body of the power supply part. Since a component and a component number can be used in common regardless of the difference in the vehicle type, cost can be reduced.

Provided for may be an electromagnetic interference mitigation apparatus comprising a power supply; a power cord; a power supply chassis encapsulating at least the power supply, the power supply physically isolated from the power cord; a low value resistor in electrical communication with at least the power cord and the power supply; and a capacitor disposed between the power supply chassis and an equipment chassis, wherein the equipment chassis encapsulates the power supply chassis, wherein the equipment chassis is disposed a distance from the power supply chassis, and wherein the capacitor is formed by the equipment chassis and the power supply chassis.

An electronic control device includes a housing that stores a substrate on which an electronic component is mounted, a first capacitance unit formed between the housing and the electronic component, and a second capacitance unit formed between the housing and the substrate, in which a noise transmission path is formed between the housing and the substrate via the first capacitance unit and the second capacitance unit.

A process variable transmitter includes a process variable sensor, and an electromagnetic interference (EMI) protection circuit coupled to the process variable sensor. The process variable transmitter also includes a hermetic module enclosing the EMI protection circuit, and electrical connectors coupled to the EMI protection circuit within the hermetic module. The electrical connectors are configurable from outside the hermetic module to connect electronic components of the EMI protection circuit in a configuration that provides transient protection.

A filter can include a monolithic substrate and at least one conductive layer formed over a top surface of the monolithic substrate and along at least a portion of one or more of a first top edge of the monolithic substrate or a second top edge of the monolithic substrate. A cover layer can be arranged over the top surface of the monolithic substrate. A shield layer can connect with one or more of the conductive layer(s) at the first top edge or the second top edge of the monolithic substrate. The shield layer can include a first portion formed over the first side surface of the cover layer, a second portion formed over the top surface of the cover layer, and a third portion formed over the second side surface of the cover layer.

The present disclosure relates to a broadband filter for confining or attenuating electromagnetic interference noise from one or more electrical signal sources, In an embodiment, the broadband filter comprises one or more filter stages electrically coupled by galvanic or by electromagnetic means to the one or more electrical signal sources for confining or attenuating conducted electromagnetic interference noise; one or more conductive shields electrically coupled by galvanic or by electromagnetic means to the electrical signal sources wherein the shields encapsulate the filter stages for confining or attenuating conducted and/or radiated electromagnetic interference noise; and one or more conductive partition layers to encapsulate the one or more filter stages such that the partition layers electromagnetically couple adjacent filter stages for a selected frequency range of the electromagnetic interference noise. The thickness of the conductive partition layers is chosen to control the degree of coupling.

An electronic isolator device arranged for receiving field wiring from a field element includes a connector configured to receive a surge element for providing surge functionality to the electronic isolator device, and to provide surge protection to the connectivity by way of the field wiring. The connector is configured to connect the surge element to the electronic isolator device and to the field wiring. The connector is arranged for parallel connection of the surge element with respect to the field wiring such that the surge element can be connected and disconnected with the isolator device without disrupting the connection of the isolator device with the field elements.

The present invention provides for an electronic isolator, or barrier, device arranged for receiving field wiring from a field element and further including connection means arranged to receive a surge element for providing surge functionality to the device, and to provide surge protection to the connectivity by way of the field wiring, the device arranged such that the surge element connects to the device and to the said field wiring by way of the said connection means so that operational connection/disconnection of the surge element to the device does not require disconnection of the field wiring from the device.

A filter design configured to operate in the medium voltage range of 1000 to 5000 volts, provides protection against Electromagnetic Pulse/High Altitude Electromagnetic Pulse (EMP/HEMP) intentional electromagnetic interference pulses. The filter utilizes no oil filled components to preclude the catastrophic failures (explosions) during operation. Many of the components incorporated in the present design are suited to absorbing harmonics without failing. In addition to mitigating E1 and E2 pulses, the filter is resistant to line harmonics which have proved to cause filter failure in past designs. The filter provides EMP/HEMP conducted pulse protection for downstream electronics inside hardened shelters for medium and high voltage applications.