A situation where the router in the living room shows full speed, but in the next bedroom or kitchen Wi-Fi signal The sudden loss of connection is a familiar problem for many home internet users. It's not just an inconvenience, but a real problem that interferes with work, watching high-definition movies, or playing online games. Physical obstructions, improper equipment placement, or outdated settings that have been ignored for years are often the culprits.
Before rushing out to buy expensive new equipment, it's worth conducting a basic diagnostic of your current network. In most cases, the problem can be resolved independently by repositioning the device or adjusting the radio module settings. Understanding the physics of radio wave propagation will help you transform "dead zones" into strong reception zones.
Physical obstacles and the influence of wall materials
Radio waves used for data transmission interact differently with the materials your home is made of. The most serious enemies of a wireless signal are metal structures, reinforced concrete, and thick load-bearing walls. If such an obstacle is between the router and your device, signal attenuation can be critical, up to and including a complete loss of connection.
Mirrors, aquariums, and even thick furniture can create invisible barriers. Water contained in aquariums or even large indoor plants effectively absorbs 2.4 GHz radio waves. Metal elements in walls or foil-lined insulation act as a shield, reflecting the signal back or blocking it.
⚠️ Attention: If your router is installed in a niche behind a TV with a metal back or in a closed electrical panel, you're creating your own shielding effect. Move the device into an open area to check.
Particular attention should be paid to windows. Although glass transmits signals better than concrete, modern double-glazed windows with energy-saving coatings may contain a thin layer of metal, which significantly reduces connection quality. If the router is located on a windowsill, a significant portion of the power is lost to the street, not the apartment.
Correct placement of the router in the apartment
The ideal location for an access point is a central point. Since the signal spreads in all directions (often in a torus or donut shape), placing the device in the geometric center of the home maximizes coverage. If you place the router in a corner, half the signal will be lost to neighbors or the street.
Mounting height is also important. Place the device high—on a cabinet or shelf 1.5–2 meters above the floor. This will help the signal better wrap around furniture and reduce interference from appliances on the floor. Antennas should point vertically upward if they are removable and adjustable.
Avoid proximity to sources of electromagnetic interference. Microwave ovens, baby monitors, older DECT cordless phones, and Bluetooth headsets operate in the same frequency range as Wi-Fi. A microwave oven can completely jam the network while cooking.
Setting up the 2.4 GHz and 5 GHz frequency bands
Modern routers support two main frequency ranges. Range 2.4 GHz It has better penetration and penetrates walls more effectively, but it's heavily congested by neighboring networks and household appliances. Speeds are lower, and connection stability can suffer from interference.
Range 5 GHz Provides high speeds and is less congested, but its range is shorter and it penetrates obstacles less effectively. If your router and client device support both standards, it makes sense to separate them into different networks (SSIDs) or use the Smart Connect feature if it's working correctly.
| Characteristic | 2.4 GHz band | 5 GHz band |
|---|---|---|
| Penetration ability | High (better through walls) | Low (poor penetration of obstacles) |
| Maximum speed | Up to 150-300 Mbps (realistic) | Up to 800+ Mbps |
| Interference level | High (microwaves, Bluetooth) | Short |
| Range of action | Big | Smaller |
For devices located in a distant room behind several walls, it's often more practical to force the device to switch to the 2.4 GHz network. While the speed will be lower, the connection will be more stable. This can be done in the router menu, which can be accessed at 192.168.0.1 or 192.168.1.1.
Selecting a free channel and reducing interference
In apartment buildings, the airwaves are clogged with dozens of neighboring networks. If your router and your neighbor's router are on the same channel, collisions and packet loss occur. It's important to find a free or least congested channel and configure it.
For the 2.4 GHz band, there are only three non-overlapping channels: 1, 6, and 11. Using automatic channel selection often results in the router constantly jumping between them, causing brief connection interruptions. It's better to manually select the clearest channel.
How to find a free channel?
Download the Wi-Fi Analyzer app (or similar) to your smartphone. Run a scan and look at the graph. Select the channel with the fewest neighboring networks and lock it in the Wireless Settings section of your router.
Channel width also affects stability. In a congested environment, setting the width 20 MHz instead of 40 MHz or 80 MHz can significantly improve signal quality in a distant room, sacrificing maximum theoretical speed for stability.
⚠️ Attention: Router interfaces vary from manufacturer to manufacturer (TP-Link, Asus, Keenetic, D-Link). Look for the "Wireless," "Wireless Network," or "Wi-Fi" sections to change the channel.
Firmware update and factory reset
A router's software is a fully-fledged operating system that also requires updates. Manufacturers regularly release patches that fix radio module errors and improve compatibility with new devices. Outdated firmware can cause instability.
Check the software version in the admin panel. If a new version is available, download it from the manufacturer's official website and install it through the "System Tools" or "Administration" menu. The process may take several minutes, during which time the internet will be unavailable.
☑️ Router update checklist
If channel adjustments and reordering don't help, try a full reset. This will restore your device to factory settings. Afterward, reconfigure your internet and Wi-Fi. Sometimes, accumulated configuration errors can be the cause of the problem.
Using repeaters and mesh systems
If the walls are too thick or the distance is too great, no software adjustment will help. In this case, a physical extension of the coverage area is required. The simplest way is to use Wi-Fi repeater (repeater). It receives the signal from the main router and broadcasts it further.
The repeater should be installed in an area with strong primary signal coverage, approximately halfway between the router and the "dead zone." However, repeaters often cut connection speeds in half because they operate in half-duplex mode.
A more modern and effective solution is Mesh systemsThis is a set of several modules that create a single, seamless network. Devices automatically switch between modules without losing connection as you move around the apartment. This is the best option for larger apartments and houses.
Antenna replacement and equipment upgrades
Standard antennas included with budget routers often have minimal gain. They can be replaced with more powerful models with a gain of 5 dBi or 8 dBi. This will physically change the radiation pattern and strengthen the signal in the horizontal plane.
When choosing new antennas, make sure the connector matches (usually SMA or RP-SMA). Also, pay attention to the frequency range the antenna is designed for. Universal models may perform worse than specialized ones.
If your router is more than 5-7 years old, replacing it may be the only reasonable solution. Old standards 802.11n are not capable of providing comfortable operation of modern gadgets. New models with Wi-Fi 6 support (802.11ax) cope better with multiple connected devices and have more advanced algorithms for passing through walls.
⚠️ Attention: Installing antennas with too high a gain (more than 10 dBi) in a small apartment can lead to the opposite effect - the appearance of "lobes" with a poor signal due to a change in the shape of the radiation pattern.
Cable and port diagnostics
Sometimes the problem isn't in the "air" but in the physical connection. A damaged LAN cable coming from the ISP or connecting the router to the computer can cause packet loss. Check the cable for damage, any significant kinks, and secure connections in the RJ-45 connectors.
If you use Powerline adapters (which transmit internet through the electrical wiring), make sure they are plugged directly into a power outlet and not into a surge protector or extension cord. The quality of your home's electrical wiring also directly impacts the data transfer speed of these devices.
Check if your router is overheating. Overheating of the processor or radio module leads to throttling (decreased performance) and unstable Wi-Fi operation. Ensure the device is well-ventilated and cleaned of dust.
Can foil be used to boost signal?
There's a myth about using foil to boost the signal. Theoretically, a directional shield can focus the signal in the desired direction, but in practice, this often leads to router overheating and signal reflection, worsening the situation.
Why does the internet work worse in the evening than during the day?
In the evening, during peak hours (7:00 PM to 11:00 PM), the load on ISP channels and the airwaves increases exponentially. Neighbors turn on their TVs, download files, and play online games. This creates congestion both on the ISP side and on the airwaves, reducing available speeds and increasing ping.
Does the number of connected devices affect the speed in another room?
Yes, it does have a direct impact. The router distributes time slots among all active clients. If someone in the living room is downloading torrents on a PC, and you're trying to watch a video in the bedroom, the router may not be able to handle the data flow, and the connection in the far room will be intermittent.
Is it worth buying a router with external antennas?
Routers with external antennas typically have a more powerful transmitter and a better radiation pattern than compact models with hidden antennas. For wall penetration, having three or four external antennas is a significant advantage.
Can weather affect Wi-Fi inside an apartment?
Severe thunderstorms, heavy rain, or magnetic storms can indirectly impact connection quality by creating additional atmospheric interference or interfering with the operation of provider equipment. However, indoors, this effect is usually minimal compared to indoor obstructions.