The question of how many meters a 5 GHz Wi-Fi signal penetrates is a concern for anyone who has encountered "dead zones" in their home or office. Standard router specifications often promise tens of meters, but in reality, the numbers can be significantly lower due to the propagation characteristics of high-frequency radio waves.
Unlike the older 2.4 GHz band, which is renowned for its long range, the frequency 5 GHz It has high bandwidth but low penetration. This is a fundamental law of physics: the higher the frequency, the faster the signal attenuates when it encounters obstacles. Therefore, if you plan to cover a large area, you'll need to consider many planning details.
In this article, we'll take a detailed look at real-world range figures, compare them to previous-generation networks, and provide practical tips for optimizing coverage. You'll learn how to properly position your router and which technologies can help expand your coverage area without sacrificing speed.
Actual 5GHz signal range under ideal conditions
When considering theoretical performance and open-air conditions, free of walls, furniture, and other obstacles, the 5 GHz band delivers impressive results. In a field or an empty hangar, the signal can reliably reach distances of up to 70-100 metersHowever, such conditions are extremely rare in everyday life.
The situation changes dramatically indoors. Even in a spacious studio apartment without internal partitions, the range router The range rarely exceeds 30-40 meters. This is due to signal dispersion and the presence of household appliances that create background interference. It's important to understand that the manufacturer's stated range is always calculated for an ideal environment.
The key factors here are the transmitter power and receiver sensitivity of your smartphone or laptop. It often happens that the router "sees" the device from 50 meters away, but the phone itself can no longer "call back" to the access point due to its lower antenna power.
⚠️ Attention: Don't blindly trust the numbers on the router box. The phrase "coverage up to 100 m²" often means there will be a signal, but the connection speed may drop to a minimum unsuitable for video streaming.
Range Comparison: 5 GHz vs. 2.4 GHz
To understand the real picture, it is necessary to compare the behavior of the high-frequency and low-frequency ranges. Range 2.4 GHz Traditionally considered "long-range," its waves bend better around obstacles and pass through walls, allowing the signal to reach distant rooms, albeit at a loss of speed.
The 5 GHz band operates differently. Its wavelengths are shorter and less able to penetrate solid objects. While 2.4 GHz can penetrate two brick walls and reach the kitchen, 5 GHz often trips over the first structural element. The indoor range difference can be as much as 30-40%, favoring lower frequencies.
However, 5 GHz has a huge advantage: clear airwaves. In apartment buildings, the 2.4 GHz band is often clogged with neighbors' signals, creating a "mess" and reducing the effective range of a stable connection. With 5 GHz, you can get a shorter range, but at least stable speed without jerks and pings.
Below is a table showing a rough comparison of range under various conditions:
| Conditions | 2.4 GHz range (approximately) | 5GHz range (approximately) |
|---|---|---|
| Open space | up to 100 meters | up to 70 meters |
| Office (plasterboard) | up to 30 meters | up to 15 meters |
| Apartment (brick/concrete) | 1-2 rooms | 1 room (within sight) |
Why is 5GHz faster but shorter?
High frequencies allow for more data to be transmitted per unit of time (a wider channel), but the energy of such waves is more quickly absorbed by wall materials. This is a tradeoff between speed and range.
Influence of wall and obstacle materials
The main enemy of the 5 GHz signal is dense materials. If you're wondering why there's no internet in the next room, it's likely due to the wall structure. The high-frequency signal is almost completely reflected by metal reinforcement in concrete and shielded by foil-clad insulation.
Mirrors, especially large ones, also pose a significant obstacle. The metal layer on the back of the glass acts as a shield, blocking the propagation of radio waves. Therefore, a router placed opposite a mirrored wardrobe will operate ineffectively, creating a "dead zone" behind the reflection.
Water is another signal absorber. Aquariums, heating pipes, and even houseplants with a lot of moisture in their leaves can weaken the signal. If there's a thick concrete wall with rebar between the router and your device, the 5 GHz range can be reduced to 5-10 meters.
⚠️ Attention: When installing a network in a new home, keep in mind that modern energy-saving glass (i-glass) has a metallic coating that can shield the Wi-Fi signal, preventing it from even passing through the window into the room.
To overcome these barriers, manufacturers are using technology BeamformingThis feature allows the router to determine the client's location and direct the signal specifically toward them, rather than distributing it uniformly in all directions. This helps overcome some obstacles, but it's not a panacea.
How does the number of antennas affect coverage?
Many users mistakenly believe that the more antennas a router has, the further it will penetrate a wall. In fact, the number of antennas primarily affects data transfer speed and MIMO (Multiple Input Multiple Output) technology, rather than transmit power.
The radiated power is limited by law and is typically around 100 mW (20 dBm), regardless of how many antennas protrude from the device's body. Adding antennas allows for more data streams to be transmitted simultaneously, increasing the overall channel capacity, but does not increase the physical range of the radio wave.
However, external antennas allow for their positioning. Proper antenna orientation can improve coverage in certain directions. For example, pointing one antenna vertically and the other horizontally will cover more devices with different receiving antenna orientations (phones often have horizontal antenna orientations).
Methods for increasing the range of a 5 GHz signal
If you find that 5 GHz isn't reaching the room you need, don't rush to buy the most expensive router. Often, the problem can be solved with proper configuration and changes to the network topology. The first step is to relocate the access point. The router should be located in the center of the apartment, preferably on a higher elevation.
If rearranging furniture is not possible, it is worth considering installing additional equipment. Mesh systems Mesh systems are the modern standard for large areas. They consist of multiple modules that create a single, seamless network. Unlike simple repeaters, mesh systems intelligently switch clients between nodes, ensuring a stable connection.
For those who aren't ready to replace their equipment, the only option is to use repeaters. They receive the signal from the main router and broadcast it further. However, at 5 GHz, repeaters often cut the speed in half, as they can't simultaneously receive and transmit data on the same frequency (unless a tri-band model is used).
☑️ Action plan for a weak signal
Another method is to use a cabled access point. If there's a LAN outlet in a distant room, connecting a separate access point or an old router in access point mode will provide 100% coverage in that area with maximum speed.
Choosing equipment: what to look for
When choosing a new router for large area coverage, pay attention not only to the number of antennas, but also to the device class. Standard Wi-Fi 6 (802.11ax) Offers improved multi-device capabilities and better spectrum efficiency than Wi-Fi 5 (802.11ac).
An important parameter is the presence of signal amplifiers FEM (Front End Module). In budget models, amplifiers are often integrated into the chip and have low power. High-end models feature separate, powerful amplifiers that can actually increase signal penetration, albeit within reasonable limits.
It is also worth paying attention to technology support 160 MHzWhile it doesn't increase range, it allows for faster data transfer, which compensates for speed losses at the edge of the coverage area. However, keep in mind that at 5 GHz, the 160 MHz channel is often occupied by radar, and the router may automatically switch to 80 MHz.
⚠️ Attention: Equipment specifications and communication standards are subject to change. Before purchasing an expensive mesh system or router, check the latest reviews and specifications on the manufacturer's official website, as device revisions may vary.
Frequently Asked Questions (FAQ)
Can a 5GHz router penetrate two concrete walls?
Most likely, no, you won't be able to establish a stable signal for comfortable use. The signal will either disappear completely, or the speed will drop to a few kilobits per second, allowing only text messaging. For such cases, you'll need a repeater or a mesh system.
Is the 5 GHz signal harmful to health?
No, Wi-Fi router radiation is classified as non-ionizing radiation and is within safe limits established by international standards. The power of household routers is thousands of times lower than the maximum permissible limits.
Why is the speed higher at 5 GHz, but the range is smaller?
This is a physical property of radio waves. High frequencies (5 GHz) allow more data to be packed into a wave (a wider channel), but such waves have less energy to penetrate solids than low-frequency waves (2.4 GHz).
Should I disable 2.4 GHz if I have 5 GHz?
Disabling it completely is not recommended. The 2.4 GHz band is essential for smart home devices (light bulbs, outlets), older gadgets, and as a backup channel if you're far from the router and 5 GHz isn't enough.