A radiofrequency filter utilizing a common mode choke both as a traditional common mode choke as well as the inductance in a low pass filter. Filter topology as well as component selection is optimized for wide band operation. Common mode chokes allow differential currents to pass with little attenuation while common mode currents are effectively presented with an inductance in the common current path. This inductance is used in a low pass filter configuration to present an even higher attenuation to common mode currents. The use of multiple chokes and/or differing core materials contributes to wider band operation without pronounced resonances. The capacitance used in the low pass filter is connected in a way as to reduce its effect on the data signals while still being effective in filtering.

Apparatus and techniques for implementing an isolation chamber, and more particularly for implementing an EMF shielded isolation chamber. In various embodiments, an isolation tank includes a shell having an upper cover and a lower tank portion having one or more sidewalls connected to a floor. The lower tank portion is configured to hold liquid and the lower tank portion and the upper cover together define an interior chamber configured to receive a user. The isolation tank further includes a conductive shield associated with at least a portion of the shell and configured to shield at least a portion of the interior chamber from external electromagnetic fields. In various additional embodiments, the isolation tank includes a shield ground for electrically grounding the shield and/or a liquid ground for electrically grounding the liquid.

A glove assembly is provided for coupling an electrically-conductive glove to an enclosure wall of a radio frequency shielded enclosure. Exemplary embodiments of the glove assembly and associated shielded enclosure comprise a glove interface element, a glove and a glove securement element. The glove interface element has a cylindrical flange member, a wall securement portion extending laterally of the flange member, and a glove port extending through the flange member. The glove interface element is configured to be affixed to the enclosure wall. The glove securement element is configured to clampingly secure an open end of the glove to the flange member in mutual RF-signal-sealed engagement. Resultingly, the glove is also held in electrically-conductive communication with the shielding layer of the shielded enclosure by way of the glove interface element. The glove securement element is preferably actuatable to enable a user to selectively cause and release the clamped securement.

An electromagnetic-wave-absorbing composite sheet comprising an electromagnetic-wave-absorbing film, and an electromagnetic-wave-shielding film laminated on the electromagnetic-wave-absorbing film; the electromagnetic-wave-absorbing film comprising a thin Ni or conductive polymer film having surface resistance in a range of 50-200 /square, which is formed on a surface of a plastic film; and an area ratio of the electromagnetic-wave-shielding film to the electromagnetic-wave-absorbing film being 10-80%.

An electromagnetic-wave-absorbing composite sheet comprising an electromagnetic-wave-shielding film laminated on an electromagnetic-wave-absorbing film; the electromagnetic-wave-absorbing film comprising a single- or multi-layer thin metal film formed on a surface of a plastic film, the thin metal film being provided with large numbers (pluralities) of substantially parallel, intermittent, linear scratches with irregular widths and intervals in plural directions; the electromagnetic-wave-shielding film being a conductive metal foil, a plastic film having a thin conductive metal film or coating, or a carbon sheet; and an area ratio of the electromagnetic-wave-shielding film to the electromagnetic-wave-absorbing film being 10-80%.

Apparatus for protecting sensitive equipment from impact, dust, dirt, moisture, smoke, and flame comprised of a container that attaches to load bearing equipment used by military, law enforcement and related professions. Apparatus for an attachable protective case capable isolating sensitive equipment from electromagnetic radiation. The apparatus can include an attachment component pivotably associated with the container. A distal end of the attachment component can include a locking feature releasably engageable with a corresponding locking feature disposed on a portion of the container such that the attachment component captures a portion of material of a separate device between the attachment component and the container.

Apparatus and techniques for implementing an isolation chamber, and more particularly for implementing an EMF shielded isolation chamber. In various embodiments, an isolation tank includes a shell having an upper cover and a lower tank portion having one or more sidewalls connected to a floor. The lower tank portion is configured to hold liquid and the lower tank portion and the upper cover together define an interior chamber configured to receive a user. The isolation tank further includes a conductive shield associated with at least a portion of the shell and configured to shield at least a portion of the interior chamber from external electromagnetic fields. In various additional embodiments, the isolation tank includes a shield ground for electrically grounding the shield and/or a liquid ground for electrically grounding the liquid.

A magnetically shielded room includes an upper shielding body, a side peripheral shielding body and a lower shielding body, all of which define a magnetically shielded inner space. The magnetically shielded inner space is divided into first and second inner spaces by a partition member which is a magnetic shielding body. A door, which is a magnetic shielding body, is provided for commonly closing the first and second inner spaces.

A shield enclosure includes a housing with a peripheral wall that defines a cavity, and a cover removably coupleable to the housing to at least partially seal the cavity. The cavity is sized to receive a printed circuit board therein. The housing shields the printed circuit board from electromagnetic interference and noise during noise figure testing of a radiofrequency component on the printed circuit board.

A magnetically shielded room, that is capable of suppressing positional deviation of a measuring tool in an internal space, has an upper shielding body, a side periphery shielding body, and a lower shielding body, which form a magnetically shielded internal space of the magnetically shielded room. A pedestal has a higher rigidity than the lower shielding body, and is located on an under surface of the lower shielding body. First and second supporting members are located on and stand erect from the pedestal. The first and second supporting members penetrate the lower shielding body and extend into the internal space.