58.0 GHz Band
Understanding the 58.0 GHz Band
The 58.0 GHz frequency is exactly "Channel 2" of the global WiGig standard. It is the heart of the unlicensed V-Band spectrum.
The Unlicensed Advantage
If an enterprise business or an internet service provider (ISP) wants to beam a wireless 1 Gigabit connection from Building A to Building B using a traditional microwave band (like 11 GHz or 23 GHz), they must hire a lawyer, perform an expensive frequency coordination study, and pay the FCC thousands of dollars for a specific license.
The 58.0 GHz band completely bypasses this bureaucratic nightmare.
Because the frequency is unlicensed (Part 15 rules), anyone can buy a pair of 58 GHz radios online, bolt them to the roofs of the two buildings, and instantly establish a multi-gigabit link for free.
The Physics of Security
Why does the FCC allow people to use 58 GHz without a license? Because the band physically polices itself.
- The 58 GHz frequency is violently absorbed by oxygen molecules in the air.
- A powerful 58 GHz radio beam will simply run out of energy and die after roughly half a mile.
- Because the signal cannot travel for miles, it physically cannot jam or interfere with other telecom networks in the city. You can have a hundred different companies running 58 GHz links in downtown Manhattan, and they will never cross paths.
Furthermore, because the 5.1mm wavelength requires a parabolic dish that generates a highly focused, 1-degree 'pencil beam', a hacker would have to physically fly a drone directly into the invisible beam to intercept the data.
Key Equations
The 58.0 GHz Band is a massive block of unlicensed millimeter-wave spectrum residing squarely within the V-Band (operating at a microscopic 5.1-millimeter wavelength). Falling under...
Key specifications:
58.0 GHz | 60 GHz | 802.11 a | 58 GHz
Power: P(dBm) = 10log(PmW), 0dBm = 1mW
Comparison
| Band | Range | Wavelength | Application | Standard |
|---|---|---|---|---|
| 58.0 GHz Band | 58 GHz region | 5.2 mm | Primary use | ITU allocation |
| Adjacent lower | 52.2 GHz | 5.7 mm | Related band | Shared spectrum |
| Adjacent upper | 63.8 GHz | 4.7 mm | Related band | Guard band |
| Harmonic 2f | 116.0 GHz | 2.6 mm | Spurious | Filter required |
| Sub-harmonic | 29.0 GHz | 10.3 mm | LO option | Mixer design |
Frequently Asked Questions
Can rain destroy a 58 GHz link?
Absolutely. Rain Fade is the ultimate enemy of the V-Band. Physical raindrops are larger than the 5.1mm radio wave. During a heavy thunderstorm, the water violently scatters the beam. An ISP must strictly limit the distance of a 58 GHz link (usually to under 500 meters) to ensure it has enough raw power to blast through the rain without dropping the connection.
How wide is a 58 GHz channel?
Massive. A standard WiGig channel at 58.32 GHz (Channel 2) is a staggering 2,160 MHz wide. To put that in perspective, a standard 4G LTE cell tower uses a tiny 20 MHz channel. This astronomical bandwidth allows cheap 58 GHz radios to easily push 1 Gbps to 2 Gbps of raw throughput.
Is this the same as 5 GHz Wi-Fi?
No, it is an entirely different world of physics. Standard 5 GHz Wi-Fi easily punches through drywall to cover your house. A 58 GHz radio wave cannot penetrate a piece of paper, and will instantly drop the connection if a bird flies in front of the dish.