Using our proprietary EO sensor probes, we directly probe the electric field around a device under test and visualize the measured amplitude and phase distribution in space. Covering 1 GHz to 330 GHz — microwave through terahertz — this is a versatile measurement technology: evaluating radar-transparent materials for automotive millimeter-wave radar, characterizing complex reflection/scattering fields such as metasurfaces, and antenna near-field measurement. Available as systems or as a contract measurement service, to suit your situation.
We probe the electric field in the space around an antenna or device and acquire amplitude and phase distributions as maps. Because you obtain the same kind of field information as a simulation — but from the real object — you can directly confirm where and how the radio wave propagates. It excels at problems that are difficult to solve in simulation, and at evaluating complex reflection and scattering fields.
The probe element is an EO (nonlinear optical) crystal. Being a small, metal-free, fiber-optic probe, it probes the field while barely disturbing it, enabling low-invasive measurement up to several hundred GHz.
Concept of field measurement with EO sensor probes
The technique is not tied to any particular band. Automotive radar bands (76–81 GHz), the 28 GHz band used for 5G/6G and metasurfaces, and terahertz applications — all can be visualized within the same framework.
Supported frequency range
The figure shows the aperture of a 76.5 GHz gain horn antenna, measured and compared with simulation. Even at millimeter-wave frequencies, measurement yields the same field information (amplitude and phase) as simulation. Cross-checking basic conditions between measurement and simulation raises confidence when analyzing complex fields, and can be used to improve the accuracy of the analysis itself.
The figure shows measurement of a 28 GHz-band metasurface reflector, designed for anomalous reflection: here the wave reflects 30° away from the specular direction. Both the field strength (amplitude/phase) near the object and the wave propagating away are visible in measurement, so you can confirm at what angle and how strongly the wave actually reflects — an ideal tool for design evaluation and feedback.
Field disturbance and leakage behind radomes, emblems, and bumpers can be visualized directly at the field level. Use it to assess whether a cover material could cause radar angle errors, or to pinpoint the cause of anomalies found in radar performance evaluation or dielectric characterization.
The low-invasive EO sensor probe is also suited to measuring fields close to antennas. Since amplitude and phase are acquired without disturbing the near field, near-field-to-far-field transformation is computed correctly, extending the technique to radiation-pattern evaluation.
System sales, contract measurement, and more — we adapt to your situation.
Contract R&D, custom measurement instruments, software development, joint research — we work in whatever form suits your project.
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