57.0 GHz Band
Understanding the 57.0 GHz Band
In standard Wi-Fi (like 2.4 GHz or 5 GHz), the goal is to blast the signal as far as possible, penetrating walls to cover the entire house. The 57.0 GHz Band does the exact opposite.
The WiGig Revolution (802.11ad / 802.11ay)
The 57.0 GHz frequency marks the official start of the unlicensed 'WiGig' spectrum (which stretches from 57 GHz all the way up to 71 GHz).
Because the band sits inside the V-Band Oxygen Absorption Peak, the air literally eats the radio wave. A 57 GHz signal cannot penetrate a piece of drywall, and it struggles to travel further than 30 feet in an open room.
Why is this useful? Extreme Bandwidth without Interference.
- In an apartment building, everyone's 5 GHz Wi-Fi bleeds through the walls and crashes into each other, causing massive network congestion.
- If every apartment uses a 57 GHz WiGig router, the signals instantly die when they hit the drywall. Zero interference.
- Because the band is so massive and empty, a WiGig router uses a staggering 2.16 GHz-wide channel (compared to a tiny 20 MHz channel in standard Wi-Fi).
- This allows the router to instantly blast 7 Gigabits per second of raw data to a device sitting in the exact same room.
Wireless VR and Desktop Hubs
The primary use case for 57 GHz is replacing high-speed cables.
If you have a high-end Virtual Reality (VR) headset, a heavy HDMI cable ruins the experience. By putting a tiny 57 GHz antenna on the headset and another on the PC, you can beam the massive, uncompressed 4K video stream through the air with less than 1 millisecond of latency. If the user walks out of the room, the connection instantly drops, but while they are in the room, it acts exactly like an invisible fiber-optic cable.
Key Equations
The 57.0 GHz Band represents the lowest edge of the massive, globally unlicensed 60 GHz V-Band spectrum. Sitting squarely on the precipice of extreme atmospheric...
Key specifications:
57.0 GHz | 60 GHz | 57 GHz | 802.11 a | 2.16 GHz
Power: P(dBm) = 10log(PmW), 0dBm = 1mW
Comparison
| Band | Range | Wavelength | Application | Standard |
|---|---|---|---|---|
| 57.0 GHz Band | 57 GHz region | 5.3 mm | Primary use | ITU allocation |
| Adjacent lower | 51.3 GHz | 5.8 mm | Related band | Shared spectrum |
| Adjacent upper | 62.7 GHz | 4.8 mm | Related band | Guard band |
| Harmonic 2f | 114.0 GHz | 2.6 mm | Spurious | Filter required |
| Sub-harmonic | 28.5 GHz | 10.5 mm | LO option | Mixer design |
Frequently Asked Questions
Can my smartphone use 57 GHz?
Some can. Several gaming-focused smartphones (like the Asus ROG Phone series) include dedicated WiGig antennas. However, the technology never caught on for mainstream phones (like Apple or Samsung) because the antenna requires perfect line-of-sight. If you hold the phone normally and your hand accidentally covers the tiny mmWave antenna, the 57 GHz signal is instantly destroyed by your skin.
Does 57 GHz use Massive MIMO?
Yes. A 57 GHz WiGig router does not broadcast an omni-directional wave. It uses a microscopic phased-array antenna (often containing 32 or 64 elements) to generate a tight, laser-like beam. The router mathematically sweeps the room to find your laptop, and then locks the beam directly onto it, bouncing the wave off the ceiling if someone walks in front of the router.
Is 57 GHz used outdoors?
Yes, for Point-to-Point links. Telecom companies use highly directional 57 GHz parabolic dishes to beam Gigabit internet from one rooftop to another (like connecting two enterprise buildings across a street). Because the oxygen naturally kills the signal after half a mile, the telecom company doesn't have to worry about the beam accidentally jamming a cell tower miles away.