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Is WIFI dual-band antenna better or single-ba✔λ↕γnd antenna better?

Time:2020-09-05 18:30:20  ≠≈↑ ;   Edit:ShenXun     PV:814 ₹∏

The WiFi signal of 2.4GHz and 5GHz dual-b• ↓✘and antennas is quite differen↕  t. Generally, the 2.★≈☆4GHz and 5GHz dual-band antennas are independent★<•. To ensure the best Wiφ✘≠✔Fi performance, keep the antennas£ ✔→ of the same frequency band as f'≈↓§ar apart as possible. The antenna layout is♦σ× then staggered as in the p♥‌¶icture above.

The 2.4GHz spectrum ranges from 2.4GH€¥₩←z to 2.4835GHz, with a total bandwidth of 83.€¶&5M, divided into 13 channels, and each channel $<£is 20M wide. Its theoretical ma♥±ximum downlink bandwidth is 600M ®bps.

It can be seen from the f≠∏igure that these 13 channels of∏‍α the 2.4G frequency spectrum overlap closel∞​y and interference i ¶$s inevitable. Note that the 14th channel on the w÷←≈±ay is not allowed in China. The interference pβ€roblem is also one of the biggest disadvan‍δ αtages of WiFi in the 2.4GH£δz band.

The 5GHz spectrum ranges from 4.910GHz →↕≥to 5.875GHz, and the spectrum bandwidth is m™​↑ uch larger than the 2.4GHz b €•∏and. And there is basically no interferenceβ‌ between 5G spectrum. Its theoretical maximu∞φm downlink bandwidth is 1730Mbps H€∑πowever, the disadvan₽₹€¥tage of 5G band WiFi is that its high frequen♣→"♥cy and short wavelength, large si≤←‍≈gnal loss and weak penetration ability, which →∞‌results in the signalφ•" coverage below the 2.4GHz band.

Now that the two are ≠∑combined to complement each other£Ω→, dual-band routers have emerged. This not only$↔π± ensures the compatibility of connected¥∑ devices, but also t ♥akes into account the WiFi covera ≠ge and network connection speed.

The dual-band antenna router Wi≈¶λ'Fi has the blessing of MIMO technology. Among t∑₽hem, the 2.4GHz band¶γ uses 2-4 antennas to achieve 2x2MIMO mo✘ ♠de or even 4x4MIMO, making the wireless ra₹€≈→te up to 600Mbps; thφ¥>e 5GHz band uses another 2-4 antenna™πs to achieve 2x2MIMO or 4x4MIMO ef₽φ≥←fects, making the wireless rate up to 1730Mbps©✘. Obviously, dual-frequency an✔≤∞tennas are more secure than sinπ​γgle-frequency antennas in terms of signa₩♦≥δl stability.

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