Designing Circuits for 'Nosebleed' Spectrum a Big Challenge, Lawyer Says
“Nosebleed” or extremely high frequency spectrum being looked at by the FCC for wireless use comes with advantages and disadvantages, Mitchell Lazarus of Fletcher Heald said Thursday in a blog post. Because the wavelength is short, less than three millimeters,…
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“designing circuits is a major challenge,” Lazarus wrote. “A device’s internal components typically have dimensions comparable to this wavelength; without appropriate precautions, they act like little antennas transmitting and receiving to each other within the device, and that impairs performance.” The big advantage is that the high-frequency spectrum is almost empty, he added. “Uniquely in the spectrum, there is enough radio bandwidth here to permit data capacities similar to those of fiber-optic cable,” Lazarus said. “A compact antenna just a few inches across can provide a highly directional beam. The same frequencies can be reused nearby.”