In order to deliver the large increase in wireless data transfer needed for the new 5G wireless standard, a spectrum in the millimeter wave range will be needed. There is simply not enough available spectrum in the sub-6GHz range. The millimeter wave range is largely unregulated with wide chunks of available bandwidth making it ideal for data transfer applications. As in lower frequency applications in the RF/microwave bands, control of electromagnetic interference (EMI) is critical in the mmWave bands. Traditional shielding techniques are less effective due to smaller wavelengths. A gap in a shield that is negligible at 3 GHz becomes large in terms of a wavelength at 30 GHz. While higher tolerance manufacturing techniques can mitigate this somewhat, the use of absorbers for EMI control in the mmWave range is critical.
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