• 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 that can disturb neighboring circuitry. Emission scan technologies that API have 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) as well as identify FF sources and NF hot spots. SEE (Shielding Effectiveness Evaluation) scan is one of the hottest applications of EMI scanning today.

EMI Scan:

EMI Scan may be the most common NF emission scan. It picks up fields at reactive near field (NF) regions. Selection of proper probes is the most vital step for precise NF measurement. API developed the SEE (Shielding Effectiveness Evaluation) test, and is working with leading hand-held device manufacturers and their suppliers. Field calculations enable users to expand the depth of information that can be collected from NF regions.
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ESM Scan:

Fields are scanned in non-reactive near field regions (2~3 lambda away from the source) where most evanescent waves die 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 ability to have automated measuring of phases in broad-band makes API's phase measurement technology unique.
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NF to FF Transformation:

NF to FF Transformation 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 the SmartScan software.
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Resonance Scan:

The presence of unintended resonators in the circuit can be a significant cause of immunity or emission failures. The resonance scan detects whether such resonators exist, and if they exist, their respective locations and resonating frequencies.
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