解决方案 HT20模式的信道宽度为20MHz，HT40模式的信道带宽为40MHz。. 将两个相邻的20MHz信道捆绑在一起形成一个40MHz的信道，其中一个是主信道，一个是辅信道。. 主信道：发送beacon报文和部分数据报文；辅信道：发送其它报文。. 在2.4GHz使用HT40模式，频段内只有
Thedefault channel width used in the 5GHz band is 20 or 40MHz but with Wi-Fi 6E this can be easily bumped up to 80 and 160MHz. This gives Wi-Fi 6E a benefit over existing Wi-Fi 5 and WiFi 6 deployment. These channels are essentially 4 x 20MHz channels apart from each other. With Wi-Fi 6E using 80MHz channels is going to be the new standard
InLTE, the maximum carrier bandwidth is limited to 20 MHz and aggregating multiple 20 MHz carriers paved the way towards Gigabit-LTE. In 5G, Carrier Aggregation is supported for low and mid-band frequencies below 7 GHz (Frequency Range 1 or FR1) and for high band millimetre wave frequencies above 24 GHz (Frequency Range 2 or FR2).
20MHzchannel 800ns GI 130Mbps. 20Mhz channel 400ns GI 144Mbps. 40MHz channel 800ns GI 270Mbps. 40Mhz channel 400ns GI 300Mbps. Smaller guard interval more bandwidth. Also if you double the channel width you get slightly more throughput than simply doubling the data rate as the bit where the two channels join is used more efficiently.
40MHz. 5 Ghz offers significantly more bandwidth than 2.4 GHz. All of the 5 GHz channels offered support at least 20MHz channel width without overlap. When using 5 GHz, it is recommended to use at least 40 MHz channel width, as some client devices may not prefer 5 GHz unless it offers a greater channel width than 2.4 GHz.
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which is better bandwidth 20mhz or 40mhz
