Spectrum Emission Mask Measurements Special Considerations for Millimeter-Wave
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5G promises a robust Internet of Things (IoT) comprised of billions of wireless devices running on a network supported by by mmWave frequencies of 30 GHz and higher. Controlling spurious and other unwanted frequency emissions from these devices becomes more critical as the density of wireless devices increases. The standards for these emissions are set by various regulatory institutions to ensure that every wireless device will minimize interference outside of its channel.
A spectrum emission mask is a convenient way to check if your device meets the relevant standards. The mask is a limit of power at specific frequencies surrounding the carrier channel expressed as a function of the carrier power. The range for spectrum mask measurements has traditionally been in the MHz range, but broadband mmWave signals will require new regulations and test protocols in the 30 to 300 GHz range.