The situation when the wireless network signal suddenly becomes unstable or disappears completely in distant rooms is familiar to many equipment owners. MikrotikUsers often encounter problems with the device's stated range, which doesn't match the actual performance in urban areas or complex office layouts. The solution lies not only in replacing the hardware but also in properly configuring the transmitter and receiver software.
In this article we will look at how to increase Wi-Fi power on Mikrotik, using the built-in capabilities of the operating system RouterOSYou'll learn the intricacies of output power settings, choosing the right frequency bands, and physical antenna placement to achieve maximum coverage without sacrificing connection quality.
Before making any changes, it's important to understand that blindly increasing parameters can have the opposite effect—overloading the airwaves and reducing speed. Optimization Requires a comprehensive approach that takes into account your country's legal regulations and the technical limitations of your specific router model. Let's start with the basic operating principles of a wireless module.
⚠️ Note: The maximum permissible transmitter power is regulated by the laws of your country. Exceeding these limits may result in fines from telecommunications regulators. Always check official requirements before changing TX-power settings.
Analysis of the current state of the wireless network
The first step to improving the situation is diagnostics. Don't guess why the signal is weak; it's better to look at the facts. Built-in tools RouterOS allow you to get a detailed picture of the radio frequency environment. Use the command /interface wireless scan in the terminal or graphical interface WinBox to view the list of available networks.
Pay attention to the noise floor and signal-to-noise ratio (SNR). High noise levels can negate even maximum transmitter power. If the airwaves are clogged with neighboring routers operating on the same frequency, increasing the power will only increase interference without increasing speed.
It's also important to check your current interface settings. Often, conservative values are set by default to ensure compatibility with older clients. Check which one security protocol and channel width standard are used because it directly affects throughput.
Setting Output Power (Tx Power) in RouterOS
The main parameter that interests users who want to boost the signal is tx-power. In the interface WinBox it is in the tab Wireless, by double-clicking on your interface, on the tab AdvancedHowever, simply turning the slider to the maximum is not always the right solution.
Each model Mikrotik has its own physical limitations. Exceeding the manufacturer's recommended values can lead to chip overheating and a reduced device lifespan. Furthermore, there is the concept of EIRP (equivalent radiated power), which is the sum of the transmitter power and the antenna gain.
To set up, use the following steps:
- 📡 Open
Wirelessand select the desired interface (usually wlan1 or wlan2). - ⚙️ Go to the tab
Advanced Modeand find the fieldtx-power. - 🔍 Make sure the mode is selected
all-rates-fixedormanual, if the automation does not work correctly. - 💾 Click
ApplyAndOKto save changes.
It's worth noting that increasing power on the router alone doesn't guarantee improved connectivity. The client device (smartphone or laptop) also needs to have sufficient power to respond. If the router is too loud and the phone is too quiet, a stable connection won't be possible.
Selecting the optimal frequency and channel width
Channel frequency and bandwidth play a critical role in connection stability. In the 2.4 GHz band, only three non-overlapping channels are available (1, 6, 11). Channel bandwidth usage 20/40Mhz Ce in this range often leads to the capture of neighboring frequencies and a drop in signal quality in apartment buildings.
The situation is better for the 5 GHz band, but there are still some nuances. Wide channels (80 MHz and above) provide high speeds, but are less able to penetrate walls and are more susceptible to interference. If your goal is to cover a large area rather than maximize speed in a single room, it makes sense to artificially limit the channel width.
Recommended settings for different scenarios:
- 🏢 Office with many walls: 5 GHz frequency, 20 or 40 MHz channel width.
- 🏠 Private home: 2.4 GHz frequency (for range) or 5 GHz (for speed), 20/40 MHz channel.
- 🎮 Gaming and 4K video: 5 GHz frequency, 80 MHz channel, provided there are no neighbors.
⚠️ Note: Interfaces and menu item names may vary depending on the RouterOS version (v6, v7) and the specific device model (hAP, cAP, SXT). Always check the documentation for your software version.
Using antennas and external amplifiers
The physical component of a network is often ignored, although it is the antennas that determine the signal pattern. Built-in antennas in home routers Mikrotik Typically, they have omnidirectional characteristics. To improve coverage in one direction, consider installing an external high-gain antenna.
When connecting an external antenna, consider cable losses. Using long or low-quality pigtails (adapters) can negate the gains of a powerful antenna. Try to minimize the cable length between the router and the antenna.
Comparison of antenna types:
| Antenna type | Gain | Direction | Application |
|---|---|---|---|
| Pin (Omni) | 2-5 dBi | 360 degrees | Apartments, open offices |
| Panel | 10-15 dBi | 60-90 degrees | Transmitting a signal to one room |
| Parabolic | 20+ dBi | Narrow beam | Connecting buildings (Point-to-Point) |
How to calculate EIRP?
EIRP (Effective Isotropic Radiated Power) is the power that would be radiated by an ideal omnidirectional antenna. The formula is: EIRP = Transmitter Power (dBm) + Antenna Gain (dBi) - Cable Loss (dB). Regulations often limit EIRP, not just the chip power.
Optimization of security protocols and standards
The choice of encryption protocol affects not only security but also performance. Older standards, such as WEP or TKIP, are not only vulnerable, but also limit connection speed, forcing the router's processor to operate in an inefficient mode. For maximum power and speed, use WPA2-AES or WPA3.
It's also worth paying attention to wireless standards (802.11 b/g/n/ac/ax). If your network includes very old devices that only support 802.11b, they may slow down the entire network. In the settings Wireless you can set the mode only-g or only-n, disabling support for legacy protocols.
Enabling the function HW Protection (hardware protection) can help in environments with a large number of devices. However, on very powerful processors, it sometimes creates unnecessary load. Experiment with the settings. hw-protection-mode, choosing between rts-cts And cts-to-self depending on customer density.
☑️ Wi-Fi Optimization Checklist
Additional Mesh settings and features
If a single router is physically insufficient to cover the entire area, increasing power to its maximum limits is a dead end. In such cases, it's more efficient to use technology Mesh or setting up multiple access points with roaming. Mikrotik supports the protocol 802.11r (Fast Roaming), which allows clients to quickly switch between access points without losing connection.
To implement roaming, you need to configure the same network names (SSID), channels (preferably different, non-overlapping), and security profile on all devices. It is also recommended to enable hide-ssid=no and set up multicast-helper to improve the performance of broadcast packets.
Don't forget about the function Band Steering, if your equipment supports dual-band operation. It allows you to route 5 GHz clients to the less crowded frequency band, freeing up 2.4 GHz airtime for older devices.
⚠️ Warning: After changing power or frequency settings, always reboot the interface or the entire device. Some parameters in RouterOS are applied only after a complete initialization cycle of the radio module.
Frequently Asked Questions (FAQ)
Is it possible to flash Mikrotik to remove power limitations?
Technically, there are modified versions of firmware, but their use strongly not recommendedThis violates the license agreement, voids the warranty, and may result in physical combustion of the radio module due to excessive current loads. Furthermore, it is illegal in many jurisdictions.
Why did the speed drop after increasing tx-power?
You're most likely experiencing interference or overheating. A signal that's too strong can "saturate" itself (receiver saturation) or interfere with adjacent channels. Also, check the device's temperature in the menu. System -> Health.
What is the maximum power permitted in the Russian Federation?
According to current State Commission for Radio Frequencies (SCRF) decisions, the maximum equivalent output power (EIRP) for indoor user equipment in the 2.4 GHz band is generally limited to 100 mW (20 dBm). The exact figures depend on the specific frequency band and the type of equipment.
Will an external antenna help if the router is in a closet?
Yes, but only if you place the antenna outside. Metal cabinet doors shield the signal almost completely (the Faraday effect). The antenna must be located in an open area to be effective.