2.4GHz or 5GHz, Which One is Better to Used in WiFi Wireless Security System
Time:2017-10-13
Most home users like using the WiFi IP cameras security system, because there is no need Ethernet cable to be used for the network connection, easy installation and operation. As a video surveillance solution provider, we often have been asked many questions about the WiFi, such as how far can a WiFi signal reach? 2.4 Ghz or 5Ghz which is better or what else. In this article, we intend to offer you these basic knowledge allowing you to find answers.
As we know, 2.4GHz is the most widely used WiFi band, it includes 802.11 b/g/n standards; 5GHz is another wireless band for dual-band WiFi devices, including 802.11 n/ac standard; Perhaps many people are inclined to think the new WiFi standard will be better than previous one, 5 > 2.4, is this true? Let‘s compare they two as following aspects.
1. Transmission Speed:
It‘s easy to compare the transmission speed data, however there are some differences. 2.4GHz band is the public channel has been widely used by diversity electronics, so interference is particularly serious. If you are in an office building or an apartment, a room will be covered by dozens of different WiFi signals, signal congestion will reduce the network transmission speed. When using 5GHz band, utilizing MIMO technology can double the network bandwidth.
2. Transmission Distance:
No accurate data for the transmitting distance of WiFi, we only can find the general data which has been acknowledged by many users. According to the published data by Wikipedia,we find the following approximate WiFi range:
【Return list】
1. Transmission Speed:
--2.4GHz: max. 300Mbps transmission speed, this is the maximum data speed what the 802.11n router can achieve when using 2x2 MIMO antenna. Some products claim to support 600Mbps, because under 40Mbps condition, it adds 4x4 MIMO antenna design.
--5GHz: max. 867Mbps, you can find many dual-band WiFi routers from TP-LINK and Tenda etc manufacturers. Typically these products claim to offer 1167Mbps bandwidth, it‘s the total bandwidth that has included 300Mbps offered by 2.4GHz band.
It‘s easy to compare the transmission speed data, however there are some differences. 2.4GHz band is the public channel has been widely used by diversity electronics, so interference is particularly serious. If you are in an office building or an apartment, a room will be covered by dozens of different WiFi signals, signal congestion will reduce the network transmission speed. When using 5GHz band, utilizing MIMO technology can double the network bandwidth.
2. Transmission Distance:
No accurate data for the transmitting distance of WiFi, we only can find the general data which has been acknowledged by many users. According to the published data by Wikipedia,we find the following approximate WiFi range:
--2.4GHz: 70M(indoor), 250M(outdoor)
--5GHz: 35M (indoor)
According the the "signal attenuation" phenomenon in physics, the higher of frequency, the shorter of signal transmission distance. However, the clever engineers invented the "beamforming" technology, to make up a little. While the general (2.4GHz, 5GHz) WiFi, the signal will be spread around, so WiFi signal can even cover every corners of the house. The "beamforming" allows the signal concentrated in a certain direction, by increasing the transmit power to ensure that this signal can be transmitted farther. But the beamforming technology has its limitation, you can‘t expect the 5GHz‘s transmission distance can exceed 2.4GHz.
In summary, which WiFi signal is fast and good among 2.4GHz, 5GHz? You may have the answer, if you expect a long transmission distance, 2.4GHz can penetrate walls to offer you good signal coverage; if want to use WiFi in commercial building, 5GHz can be your choice.
According the the "signal attenuation" phenomenon in physics, the higher of frequency, the shorter of signal transmission distance. However, the clever engineers invented the "beamforming" technology, to make up a little. While the general (2.4GHz, 5GHz) WiFi, the signal will be spread around, so WiFi signal can even cover every corners of the house. The "beamforming" allows the signal concentrated in a certain direction, by increasing the transmit power to ensure that this signal can be transmitted farther. But the beamforming technology has its limitation, you can‘t expect the 5GHz‘s transmission distance can exceed 2.4GHz.
In summary, which WiFi signal is fast and good among 2.4GHz, 5GHz? You may have the answer, if you expect a long transmission distance, 2.4GHz can penetrate walls to offer you good signal coverage; if want to use WiFi in commercial building, 5GHz can be your choice.
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