Have you ever wondered why some routers look like hedgehogs with dozens of antennas, while others make do with just a couple of modest antennas? Marketers claim that "more antennas = better signal," but is that really true? In this article, we'll figure out how. number and configuration of antennas affect the operation of Wi-Fi, what technologies are behind multi-antenna monsters like ASUS RT-AX88U or TP-Link Archer AX11000, and do you need to overpay for 8 antennas if you have an apartment of 40 m².
Spoiler: The antennas in the router don't act as signal amplifiers, but as part of a MIMO system that divides the data stream into multiple channels—this is a fundamentally different approach than simply "increasing power."But there are some nuances: in some scenarios, 4 antennas will perform better than 8, and sometimes even 2 are more than enough. Let's dig deeper.
How Antennas Affect Wi-Fi Speed: MIMO Technology in Simple Terms
If you think that each antenna in a router is responsible for its own coverage angle—like a radar—this is a common misconception. In fact, modern routers use technology MIMO (Multiple Input Multiple Output), where the antennas work together, not individually. Here's how it works:
- 📡 SISO (Single Input Single Output)One antenna for transmitting, one for receiving. Maximum speed is limited by physics—like driving on a single-lane road. This is how older routers with one or two antennas work.
- 🚀 MIMO 2×2Two antennas for transmitting and two for receiving. Data is divided into two streams, doubling the speed (theoretically). This is the minimum for the standard. Wi-Fi 5 (802.11ac).
- 🌐 MU-MIMO: An advanced version of MIMO, where the router can communicate with multiple devices simultaneously (and not one at a time). Requires at least 4 antennas.
- 🔥 MIMO 4×4 or 8×8: Four or eight data streams. Used in high-end routers (Netgear Nighthawk RAXE500, ASUS GT-AX6000) for speeds above 1 Gbps.
Key point: MIMO increases throughput, But not the coverage radiusIf your smartphone only supports 1x1 MIMO (like many budget models), then a router with 8 antennas won't give you any speed boost—you simply won't be able to utilize all the available streams. It's like trying to pour water from eight taps into one bottle.
2, 4, 6, or 8 antennas: what to choose for different tasks
The number of antennas is directly related to the supported Wi-Fi standards and usage scenarios. Here's a quick comparison:
| Number of antennas | Supported technologies | Max. speed (theoretical) | Who is it suitable for? |
|---|---|---|---|
| 2 antennas | MIMO 2×2, Wi-Fi 4/5 | Up to 867 Mbps (802.11ac) | Apartments up to 50 m², 1-2 devices (smartphone + laptop) |
| 4 antennas | MIMO 4×4, MU-MIMO, Wi-Fi 6 | Up to 2.4 Gbps (802.11ax) | Homes 100+ m², 5-10 devices, 4K streaming |
| 6 antennas | MIMO 4×4 + additional for the 5 GHz band | Up to 3.6 Gbps | Offices, gamers, smart homes with 15+ devices |
| 8 antennas | MIMO 8×8, OFDMA, Wi-Fi 6E | Up to 6 Gbps | Professional tasks, servers, VR/AR |
Please note: real speed will be lower than the theoretical minimum by 2 times due to interference, distance and limitations of client devices. For example, iPhone 13 only supports MIMO 2×2, so even with a router with 8 antennas you won’t get speeds higher than ~1 Gbps.
⚠️ Attention: Manufacturers often indicate total speed across all ranges (e.g., "5400 Mbps"), but in practice, the device cannot use 2.4 GHz and 5 GHz simultaneously. Actual speed is limited to one band.
Myths about "multi-antenna" routers: what really matters
Advertising loves to exploit the myth that "the more antennas, the better." Let's address the most common misconceptions:
- 📶 Myth 1: "8 antennas will give a signal through 3 walls." Reality: The number of antennas doesn't affect signal penetration through obstacles. What's more important is transmitter power (measured in dBm) and receiver sensitivity.
- ⚡ Myth 2: "Many antennas = high speed on all devices." Reality: The speed is limited by the client device. If your laptop only supports 1x1 MIMO, a router with 8x8 MIMO won't help.
- 🔄 Myth 3: "Antennas can be replaced with more powerful ones to strengthen the signal." Reality: Replacing antennas with uncertified ones may violate legal standards for radiation power (in the Russian Federation, up to 100 mW for 2.4 GHz) and lead to fines.
- 🌍 Myth 4: "A router with 6 antennas will cover a large house without repeaters." Reality: For areas >150 m², a Mesh system is more effective (for example, TP-Link Deco or Google Nest Wi-Fi) than one "multi-antenna" router.
So why do manufacturers stuff routers with eight antennas? The answer is simple: Marketing and Future ProofThe top models are designed for Wi-Fi 6E/7, where the number of streams is truly critical for speeds of 5+ Gbps. But for most users in 2026, this is excessive.
When Multiple Antennas Are Really Needed: 5 Real-World Scenarios
Despite the marketing hype, there are situations where routers with 6+ antennas are justified:
- Gaming and cloud services. For GeForce NOW, Xbox Cloud Gaming or competitive shooters, it's not just speed that matters, but also connection stabilityMIMO 4x4 reduces latency (ping) by redundantly redundant streams.
- 4K/8K streaming to multiple devices. If everyone in the house is watching Netflix on a TV, YouTube on a tablet, and streaming Twitch on a PC, MU-MIMO will distribute the load.
- Smart home with 20+ devices. Cameras, sensors, and speakers all take up bandwidth. A multi-antenna router can handle the load better.
- Local network with NAS or home server. When transferring large files (for example, backups) between devices on a local network, MIMO 8×8 provides a speed increase of up to 2-3 times.
- Offices with high device density. In a coworking space or small office, where 30+ devices are connected to a single access point, MU-MIMO is critical for stability.
In all these cases it is important that client devices also supported modern standards. For example, 4K streaming requires a TV with Wi-Fi 6 (LG OLED C2, Sony X90K).
Make sure your devices support MIMO 2×2 or higher|Check if you need speeds >1 Gbps (500 Mbps is enough for most tasks)|Evaluate your coverage area: for a home >100 m², a mesh system is better|Check reviews on the model's stability—some routers get hot under load-->
How does the physical placement of antennas affect the signal?
Few people know, but angle and position of antennas can either improve or worsen the coverage. Here are a few rules:
- 📐 Vertical vs. Horizontal: If the router is placed on a table, it's best to position the antennas vertically (at 90°). If it's mounted to a wall, position them horizontally. This is due to the polarization of radio waves.
- 🔄 Antenna diversity: Routers with 4+ antennas are often spaced apart to reduce interference. Avoid placing the router in a corner—the antennas need space.
- 🚫 What not to do: Don't point all the antennas in one direction (like at a sofa). It's better to fan them out for even coverage.
- 📶 For dual-band routers: Typically, even antennas are responsible for 2.4 GHz, and odd ones for 5 GHz. However, this depends on the model (check the manual).
Interesting fact: in some routers (for example, Ubiquiti UniFi) antennas built-in, but it also supports 4x4 MIMO. This proves that external antennas aren't always a sign of "advanced" technology.
⚠️ Attention: In routers with external removable antennas (For example, TP-Link Archer C5400) You cannot use antennas from other models - this may lead to impedance incompatibility and signal degradation.
Antennas vs. Mesh Systems: Which is Better for a Large Home?
If your goal is to cover a 150+ sq. m. home, the choice between a multi-antenna router and a mesh system isn't obvious. Let's compare:
| Criterion | Router with 6-8 antennas | Mesh system (2-3 nodes) |
|---|---|---|
| Max. coverage area | Up to 120 m² (with interference) | Up to 300 m² (without “dead zones”) |
| Speed at the edge of the zone | It falls by 2-3 times | Stable (thanks to automatic roaming) |
| Price | From 8,000 ₽ (ASUS RT-AX82U) | From 15,000 ₽ (TP-Link Deco X20) |
| Difficulty of setup | Requires manual optimization | Automatic configuration |
Mesh systems win in most large-area scenarios, but there are exceptions:
- 🎮 For gamers: Multi-antenna router with QoS (traffic prioritization) will give lower ping than Mesh.
- 🖥️ For local network: If you need high speeds between devices (for example, for a NAS), a single powerful router will do the job better.
Why is Mesh better for multi-story buildings?
In mesh systems, nodes are connected by wires or a dedicated radio channel (5 GHz), whereas in conventional routers with repeaters, traffic is cut in half. For example, if a router delivers 1 Gbps, then after the repeater, the remaining speed is ~500 Mbps. In mesh systems, the speed remains close to the maximum on all nodes.
The Future: Wi-Fi 7 and Next-Generation Antennas
With the release of the standard Wi-Fi 7 (802.11be) In 2026–2026, antennas in routers will become even more important. New technologies that will require multi-antenna configurations:
- 🔢 320 MHz channels: Doubling the channel width (compared to Wi-Fi 6) will require more streams to operate stably.
- 🔄 Multi-Link Operation (MLO): The device can use 2.4 GHz, 5 GHz and 6 GHz simultaneously, but this requires additional antennas.
- 📈 4K-QAM: Higher modulation density (up to 4096 states) requires a clearer signal, which is provided by high-order MIMO.
Routers with this technology are already appearing 12 and even 16 antennas (For example, ASUS ROG Rapture GT-BE98). But for most users, this is still excessive - even for flagship smartphones of 2026 (like iPhone 16 Pro) do not support all Wi-Fi 7 features.
⚠️ Please note: The Wi-Fi 7 standard has not yet been finalized, and some features may change. Before purchasing a router with 802.11be support, check which features are included with your specific model.
FAQ: Answers to Frequently Asked Questions
Is it possible to add antennas to the router myself?
Technically yes, if the router has ports. RP-SMA or IPEX. But:
- ⚠️ Using uncertified antennas may violate radiated power laws.
- ⚠️ Impedance mismatch (usually 50 ohms) will result in signal loss.
- ⚠️ The router warranty will be voided.
It's better to buy a router with the required number of antennas at once.
Why does my router have 4 antennas, but the speed is lower than my friend's with 2 antennas?
There are several reasons:
- 📶 Your router may be operating in a busy band (for example, 2.4 GHz with interference from neighbors).
- 🖥️ Your device (laptop/smartphone) only supports MIMO 1×1, while your friend supports MIMO 2×2.
- ⚙️ An outdated standard is enabled in the router settings (for example, 802.11n instead of 802.11ac/ax).
Check the settings in Wireless Mode → Wi-Fi Standard and select 802.11ax (Wi-Fi 6).
Does antenna material affect signal?
Yes, but not as much as marketing makes it out to be:
- 📡 Plastic antennas cheaper, but may dissipate heat worse (important for powerful routers).
- 🔰 Metal antennas stronger and better protected from interference, but do not provide an increase in range.
- 🌐 Rubber coating (like Ubiquiti) improves moisture protection but does not affect the signal.
Much more important gain (measured in dBi). For example, an antenna with 5 dBi will cover a larger area than one with 2 dBi.
How can I check how many antennas are actually working in my router?
Methods:
- 🔍 Check the specifications on the manufacturer's website (look for lines like "4×4 MIMO").
- 📊 Find the section in the router's web interface
System Information → Wireless Network(sometimes the number of threads is indicated there). - 🛠️ Use utilities like Wi-Fi Analyzer (Android) or NetSpot (macOS/Windows) for stream analysis.
If the router has 4 physical antennas, but only MIMO 2×2 works, it means two of them are used for a different range (for example, 5 GHz).
Is it worth buying a router with 8 antennas for an apartment?
Most likely not. Here's why:
- 🏠 For an apartment up to 100 m², a router with 2-4 antennas will be enough (for example, Xiaomi AX3000 or TP-Link Archer AX21).
- 💰 Overpayment for 8 antennas can amount to 5,000–10,000 ₽ without any real return.
- ⚡ Your devices (smartphone, TV) most likely do not support MIMO 4×4+.
Exception: If you plan to upgrade all your equipment to Wi-Fi 6E/7 within the next 2 years.