5GHz Wi-Fi感覺更快是因為其更高的頻段支持更大的數據吞吐量，但傳輸距離不如2.4GHz。 1. 5GHz具有更短的波長，穿透障礙物能力差，導致覆蓋範圍較??；2. 相比之下，2.4GHz波長更長，繞射能力強，適合大空間和多障礙環(huán)境；3. 5GHz擁有23個非重疊頻道，干擾少、帶寬大，速度可達1.3Gbps以上；4. 2.4GHz因廣泛使用而易擁堵，僅有3個非重疊頻道；5. 推薦近距離使用5GHz以獲得高速體驗，如流媒體和遊戲；6. 遠距離或戶外建議使用2.4GHz以確保連接穩(wěn)定性；7. 支持雙頻或三頻的路由器可自動切換，兼顧速度與覆蓋範圍。因此，5GHz並非在所有場景下都更優(yōu)，而是適用於特定環(huán)境。

5GHz Wi-Fi feels faster because it can handle more data at once, but it doesn't reach as far as 2.4GHz. That's not a bug — it's just how radio waves work.

Higher Frequency Means Shorter Range

Radio signals at higher frequencies (like 5GHz) have shorter wavelengths. These waves are worse at going through walls, furniture, or even people. So while 5GHz can give you speeds up to 1.3 Gbps or more, that signal drops off faster the farther you get from the router.

In contrast, 2.4GHz uses longer wavelengths that bend around obstacles better and travel farther. That makes it slower overall but more reliable in larger spaces or rooms with lots of barriers.

• Thick walls or metal objects really cut down 5GHz signal
• Distance has a bigger impact on 5GHz than 2.4GHz
• Even things like mirrors or fish tanks can weaken 5GHz

More Channels, Less Congestion

One reason 5GHz feels faster is that it has more available channels and less interference. In a typical home or apartment building, dozens of devices might be using the 2.4GHz band — everything from routers to microwaves and Bluetooth devices. That creates traffic jams.

5GHz avoids most of this because it's not as widely used, and the channels are wider. Think of it like having a multi-lane highway instead of a two-lane road.

• 5GHz has 23 non-overlapping channels vs. just 3 on 2.4GHz
• Wider channels = more data moved at once = faster speeds
• Less interference = smoother streaming and quicker downloads

When to Use 5GHz (and When Not To)

If you're close to your router — say, in the same room or one floor away — 5GHz is great for streaming 4K video, gaming, or big file transfers. But if you're upstairs, outside, or in another part of a large house, 2.4GHz might be more stable, even if it's slower.

Some newer routers support dual-band or tri-band , letting you switch automatically or choose based on where you are. If your router doesn't do that, manually picking the right band can make a noticeable difference.

• Use 5GHz for speed-sensitive tasks nearby the router
• Stick with 2.4GHz when moving around the house or outdoors
• Dual-band routers help balance speed and range automatically

So yeah, 5GHz isn't always better — it's just built for different situations. It's fast, but only if you're within a reasonable distance and have a clear path. Beyond that, 2.4GHz keeps the connection alive even if it's slower.

基本上就這些。

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