An electromagnetic wave transmission board includes a composite board and a plated metal layer. The composite board has a plurality of inner walls surroundingly defining an elongated channel in an interior of the composite board. The plated metal layer is formed on at least part of the inner walls so as to jointly form an inner channel structure in the channel. The inner channel structure surroundingly defines a predetermined space filled with air, and the inner channel structure has two entrances in air communication with the predetermined space. The predetermined space of the inner channel structure is configured to receive and output an electromagnetic wave signal through the two entrances, respectively, and the electromagnetic wave transmission board is configured to transmit the electromagnetic wave signal by using the air in the predetermined space of the inner channel structure as a conductive medium.

A filter assembly is disclosed that includes a monolithic filter having a surface and a heat sink coupled to the surface of the monolithic filter. The heat sink includes a layer of thermally conductive material that can have a thickness greater than about 0.02 mm. The heat sink may provide electrical shielding for the monolithic filter. In some embodiments, the filter assembly may include an organic dielectric material, such as liquid crystalline polymer or polyphenyl ether. In some embodiments, the filter assembly may include an additional monolithic filter.

A storage module structure of a storage assembly includes an upper shielding component, a lower shielding component and a memory component. An outer surface of the upper shielding component has a plurality of heat-conducting units. The lower shielding component is located above the upper shielding component, and an accommodating space is defined between the upper shielding component and the lower shielding component. The memory component is located in the accommodating space. The heat-conducting units contact an external structure, and a thermal energy generated by the memory component is conducted to the external structure through the plurality of heat-conducting units.

A leakage magnetic field shielding device includes: a leakage magnetic field determining unit for determining phase and magnitude of a leakage magnetic field based on information obtained from a power supply device and a current collector device; a shielding current controller for determining a shielding current based on the phase and magnitude of the leakage magnetic field and supplying the determined shielding current to the leakage magnetic field shielding device; and a shielding unit for shielding the leakage magnetic field by generating a shielding magnetic field in accordance with the supply of the shielding current. The shielding unit has a multiple resonance characteristic depending on an arrangement of capacitors and coils and is disposed to surround the power supply device or the current collector device. The shielding magnetic field has resonance frequencies canceling magnetic fields corresponding to fundamental frequency and multiple frequency of the leakage magnetic field.

The present invention provides an electromagnetic wave suppression sheet provided with: an absorption layer which has surface resistivity of at least 100 / and which contains an electrical conductive material and an insulating material in the state where the electrical conductive material and the insulating material are in direct contact with each other, the insulating material having a dielectric loss tangent of 0.01 or larger at a frequency of 60 Hz at 20 C.; and a contact layer which is formed on a surface, of the absorption layer, opposite to a surface to be irradiated with electromagnetic waves and of which a surface in contact with the absorption layer has surface resistivity of at least 20 /.

The system and method for dynamically reducing the peak electromagnetic interference produced by a group of electrical or electronic switching devices connected to a common communications bus. The system and method includes a fixed range of frequencies that includes frequencies emitted by the group of switching devices during normal operation and subranges of frequencies within the fixed range of frequencies, each subrange of frequencies being associated with a unique bus address of one switching device in the group of switching devices. Each subrange of frequencies being determined by the unique bus address of its associated switching device and characteristic weights dynamically determined and/or assigned to its associated switching device and/or load by a microprocessor implemented algorithm.

Electromagnetic shields for sub-modules of electronic modules are disclosed. Electronic modules may include multiple sub-modules arranged on a substrate with an electromagnetic shield arranged to conformally cover the sub-modules as well as portions of the substrate that are uncovered by the sub-modules. Electromagnetic shields are disclosed that are configured to extend between sub-modules to form one or more divider walls. The one or more divider walls may be configured to extend below mounting surfaces of electronic components in the sub-modules to provide improved reduction of electromagnetic interference (EMI) or crosstalk between various sub-modules. Electromagnetic shields are also disclosed that form perimeter sidewalls that extend below mounting surfaces of electronic components of sub-modules to provide improved reduction of EMI from other modules or other external sources.

An induction heating system and methods of forming an induction heating system are presented. The induction heating system comprises a conductor, a susceptor surrounding the conductor, and magnetic field reduction. The susceptor has a Curie temperature. The magnetic field reduction is configured to reduce magnetic fields escaping the induction heating system when the susceptor is at the Curie temperature independent of a layout of the induction heating system within an induction heating device.

A system for reducing a specific absorption rate includes a source field generation unit wound with a first cylindrical coil and accommodating a source material therein, and generating a source field by applying a periodic input signal to the first cylindrical coil; a physical property change unit wound with a second cylindrical coil disposed adjacent to the first cylindrical coil and accommodating a transfer target therein, and changing a physical property of the transfer target based on the generated source field; and a target field circuit unit controlling the transfer target to form a target field by a PCB substrate with a power supply interface connected to a power supply and an input of the power supply.

An electronic device having a shield structure is disclosed. The shield structure includes a conductive heat diffusion plate that is provided in a position facing a mounting surface of an electronic circuit board on which electronic components, such as a CPU, are mounted, and diffuses heat generated from the CPU, etc.; and a conductive sponge-like member that is firmly fixed to at least either the mounting surface of the electronic circuit board or a surface of the conductive heat diffusion plate which faces the mounting surface of the electronic circuit board, and is provided to separate the CPU, etc. which generate electromagnetic wave noise from antennas.