which is better bandwidth 20mhz or 40mhz

Settingyour 802.11ac AP in channel 149 doesn't necessarily limit your AP to less than 80MHz as this band (called UNII-3) can be used in the U.S. without bandwidth limitation. Channel 149 itself is not the 80MHz channel (it is ch155 *) but usually, in commercial APs, you only set the primary 20MHz channel of the 80MHz one. Bandwidth Specify radio frequency bandwidth, either 20MHz or 40MHz (dual channel), that the gateway will use if 802.11n mode is configured as Automatic and the Control Channel is configured as Automatic. If the gateway detects other adjacent wireless networks, it will use 20 MHz operation so as to not interfere with the networks. Accordingto the WiFi 802.11b/g/n standard, channel widths of 20MHz or 40MHz can be configured in 2.4GHz WiFi networks. For simplicity, 20MHz channels have been represented, but the same situation occurs with 40MHz channels, occupying in this case twice the width. This is the reason why it is said that the best channels are 1, 6 and 11. Having Asshown below, 5 dB is converted to mW, which is then multiplied by the channel width (20 MHz, etc.). You can convert it back to dBm for the results. 5 dBm = 3.162278 mW x 20 MHz = 63.24556 mW or 18 dBm for a 20 MHz channel. 5 dBm = 3.162278 mW x 40 MHz = 126.4911 mW or 21 dBm for a 40 MHz channel Vay Tiền Online Chuyển Khoản Ngay.

which is better bandwidth 20mhz or 40mhz