EMC’04/Sendai INVASIVENESS OF OPTICAL MAGNETIC FIELD PROBES WITH A LOOP ANTENNA ELEMENT
نویسندگان
چکیده
Electromagnetic field probes inevitably change the original field distribution to some extent when they are positioned close to a device. That change affects measurement accuracy and the device operation. We have developed optical magnetic field probes, which comprise a loop antenna element and an electro-optic crystal, to perform magnetic nearfield measurement with high accuracy in the GHz frequency band. This study analyzes the invasiveness of the optical magnetic field probes quantitatively by experiment and finite difference time domain (FDTD) method simulation. We found that the electromagnetic field disturbance is reduced greatly by eliminating a metallic cable. In addition, the optical magnetic field probes were found to offer the advantage of accurate measurement.
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