24 Ghz WiFi: 20 MHz vs 40 MHz vs 80 MHz If you're using 2.4 GHz, the answer is simple. The best bandwidth for 2.4 Ghz is 20 MHz. In the majority of cases, using wide widths on 2.4 GHz isn't worthwhile. The performance tradeoffs from interference on overlapping channels will likely outweigh the throughput benefits. Theradio-frequency signal of 802.11n can have a bandwidth of 20 MHz or 40 MHz. But even if it is 20 MHz, it can be sampled at 20 MSa/s if an I/Q demodulator is used: at the receiver the radio-frequency signal is downconverted to the baseband. The I/Q demodulator has two lowpass output signals (Inhphase/Quadrature or real/imaginary part) with 40mhz not supported by android device . Only use 40mhz if you want speed higher than 50 mbps . If you want to use with laptop so first download wifi analyser app check if there's channel available like 1-6 or 7-11 if yes then select 40 mhz with based on channel 1 or 11 . Now check on google how to use 40 mhz wifi on windows Youcould try 40mhz channels and see if it works better. You can't change the channel numbers it is using from the client end you must do that on the router. A 90mbit/sec rate is a very common number you would see using only 20mhz bands. 40mhz will not be double but it will be significantly faster and 80mhz even more if you can get it to work. 20mhz5ghz channels are common in very dense deployments. I think for home purposes 40mhz is best practice, you are getting plenty of bandwidth and are narrow enough the channel selection algorithm has options to slot you in around the band instead of simply selecting high or low. I'd only drop to 20mhz if I was seeing channel quality issues. Speedsthat we will achieve with WiFi 5, 1024QAM and 160MHz of channel width in 5GHz. An antenna or a MIMO data stream: 1.083Mbps. Two antennas or two MIMO data streams: 2.167Mbps. Three antennas or three MIMO data streams: 3.248Mbps. Four antennas or four MIMO data streams: 4.334Mbps. Andbased on the screenshots provided, the 2.4ghz could work on 20mhz as well, not only for 40mhz. Currently, the channel and channel width on Deco could not be manually changed but the good news is that this feature has been under re-evaluation。. So besides requesting this feature again, it would be better if you could tell us directly what Whatis WIFI bandwidth 40MHz? Setting the channel width to 40 MHz network will allow you to use 2/3 of the entire Wi-Fi band. Thus having a higher chance of overlapping and interfering with other wireless networks. Meanwhile, if you set the channel width to 20 MHz, the network will only overlap with the two channels before and after that frequency. ทีนี้หน้าการตั้งค่า WIFI จะมี Bandwidth ให้เลือก คือ 20 MHz กับ 20/40 MHz ครับ. ถ้าหากว่าผมตั้งที่ 20 MHz ทุกเครื่องในบ้านใช้ได้ ไม่มีปัญหาอะไรครับ Transmissioncan be on a 22MHz (802.11b), 20MHz (802.11g/n), or 40MHz (802.11n) wide channel Wi-Fi 5 802.11 a/n (5 GHz band) Wi-Fi 5 utilizes multiple-input, multiple-output (MIMO) technology and can offer theoretical data rates of up to 3.5 Gbps ZhVB0.