• EMC/EMS Evaluation Platform and Solution Provider

Technologies > Emission

Amber Precision Instruments is a research-oriented EMC solution provider and EMC scanner manufacturer.


Electronics emit electromagnetic fields, and they can disturb neighboring circuitry. Emission scan technologies that API has developed enable users to measure near fields (NF) or fields from non-reactive near field region. Measured NF (or non-reactive NF) information can be further processed to project far field (FF), to identify FF sources, NF hot spots. SEE (Shielding Effectiveness Evaluation) scan is one of the hottest EMI scan application recent days.

EMI Scan:

EMI Scan may be the most common NF emission scan. It picks up fields at reactive near field (NF) region. Selection of proper probes is the most vital step for right NF measurement. API has developed SEE (Shielding Effectiveness Evaluation) test, and working with leading hand-held device manufacturers and suppliers to them. Field calculation at the tip of probes from measured power (usual output, dBm, of spectrum analyzer) enables users to expand their capabilities of NF information further.
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ESM Scan:

Fields are scanned in non-reactive near field region (2~3 lambda away from the source), where most evanescent waves died out, processed in k-space for efficiency with the captured phase information, and focused to the DUT surface height to identify propagating wave sources.
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Phase Measurement:

Phases can be measured in many different ways, but the uniqueness of API's phase measurement technology is that it measures phases in broad-band and in automated method.
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NF to FF Transformation:

It has been developed as a specific application of the phase measurement technology. Huygens' surface is defined over a DUT, tangential amplitude and phase information are captured in 3D, and FF transformation is performed within SmartScan software.
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Resonance Scan:

Presence of unintended resonators in the circuit can be the main reason of immunity or emission failures for some cases. The resonance scan tells whether such resonators exist, and if exist, then, location of them and resonating frequencies.
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