An electronic shielding device used to secure articles like keys and key fobs from radiating signals is disclosed. The electronic shielding device includes a housing having a lid member and a storage member, a locking unit for securing articles utilizing a locking mechanism and a plurality of attachment means connecting the lid member to the storage member. The locking unit is keyed or coded to a customer's own specific key/lock. The electronic shielding device is designed to attach to an object such as but not limited to a vehicle, a door and a window.

An electromagnetic wave shield box 50 accommodates a DUT 100 having an antenna 110 and a coupling antenna 80 that is spatially coupled to the antenna 110, and includes a coupling antenna holding module 70 that arranges a plurality of the coupling antennas 80 annually so that an antenna surface is directed to a center of a ring, and holds the coupling antennas 80. The coupling antenna holding module 70 holds each coupling antenna 80 in a posture in which the coupling antenna 80 is inclined at, for example, 32 degrees with respect to a horizontal surface so that the respective coupling antennas 80 are able to radiate radio waves toward the same radiation point in upper positions, and is rotated by about 5 degrees around a center axis C1 in a direction orthogonal to a circumferential direction of the ring of the coupling antenna 80.

An electromagnetic wave absorber evaluation apparatus including: a housing in which the electromagnetic wave absorber is allowed to be arranged, the housing being made of a conductive material with inner dimensions of a width a, a height b, and a length L, as b<a<L; a substrate arranged inside the housing; an input microstrip line and an output microstrip line formed on the substrate along a length direction of the housing and separated from each other in the length direction; and a signal inspecting unit capable of inputting an input signal having a frequency of 20 GHz or more into the input microstrip line and detecting an output signal output through the output microstrip line, in which an evaluation frequency f.sub.t obtained by the Formula (1) satisfies the Formula (2) in a frequency region of 20 GHz or more.

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.

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.

An apparatus configured to measure electromagnetic radiation coupled from an image sensor integrated circuit (IC) to a nearby cell phone antenna has an image sensor PCB with the image sensor IC on a first side and image sensor decoupling capacitors disposed on a second side, the image sensor PCB disposed within a shielding box. The apparatus also has an image processor PCB with an image processor IC on a first side and at least one image processor decoupling capacitors, the image processor IC electrically coupled to the image sensor IC. The image processor IC is located outside the shielding box, and the at least one image processor decoupling capacitor is within the shielding box. In embodiments, the decoupling capacitors are shielded with separate, additional, metal covers.

Novel tools and techniques are provided for implementing an isolation chamber, and more particularly for implementing an EMF shielded isolation chamber. In various embodiments, an isolation tank might include a shell comprising an upper cover and a lower tank portion having one or more sidewalls connected to a floor. The lower tank portion might be configured to hold liquid and the lower tank portion and the upper cover together might define an interior chamber configured to receive a user. The isolation tank might further include 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 might include a shield ground for electrically grounding the shield and/or a liquid ground for electrically grounding the liquid.

Various devices and techniques help to reduce the entry of unwanted radio waves into an enclosure and reduce the reflection of radio waves inside the enclosure. Such devices and techniques enable a test environment inside the enclosure that provides high-quality functionality and performance testing.

Various devices and techniques help to reduce the entry of unwanted radio waves into an enclosure and reduce the reflection of radio waves inside the enclosure. Such devices and techniques enable a test environment inside the enclosure that provides high-quality functionality and performance testing.

An electromagnetic wave absorber evaluation apparatus including: a housing in which the electromagnetic wave absorber is allowed to be arranged, the housing being made of a conductive material with inner dimensions of a width a, a height b, and a length L, as b<a<L; a substrate arranged inside the housing; an input microstrip line and an output microstrip line formed on the substrate along a length direction of the housing and separated from each other in the length direction; and a signal inspecting unit capable of inputting an input signal having a frequency of 20 GHz or more into the input microstrip line and detecting an output signal output through the output microstrip line, in which an evaluation frequency f.sub.t obtained by the Formula (1) satisfies the Formula (2) in a frequency region of 20 GHz or more.