In wireless video surveillance, we use wireless transmission methods to transmit video signals. This wireless transmission method is a wireless microwave method. There are many types of microwaves, and the use of microwaves is also different. Under normal circumstances, microwaves need to be transmitted in an open space. Row. Let's talk about the classification of wireless microwave frequency bands in wireless video surveillance:
1. Very low frequency: This frequency band belongs to ultra-long wave, its operating frequency is 3-30KHz, and its propagation characteristics are mainly space waves;
2. Low frequency: This frequency band belongs to long wave, its operating frequency is 30-300KHz, and the propagation characteristic is mainly ground wave;
3. Intermediate frequency: This frequency band belongs to medium wave, its operating frequency is 0.3-3MHz, and its propagation characteristics are ground wave and sky wave;
4, high frequency: This frequency band belongs to the short wave, its working frequency is 3-30MHz, the propagation characteristic is the sky wave and the ground wave;
5, VHF: This frequency band belongs to Mibo, its operating frequency is 30-300MHz, the propagation characteristics are spatial waves;
6, ultra-high frequency: This frequency band belongs to the decimeter wave, its operating frequency is 0.3-3GHz, the propagation characteristic is the spatial wave;
7, special high frequency: This frequency band belongs to the centimeter wave, its operating frequency is 3-30GHz, the propagation characteristic is the space wave;
8, extremely high frequency: This frequency band belongs to the millimeter wave, its operating frequency is 30-300GHz, the propagation characteristic is the space wave.
The article comes from the classification of wireless microwave frequency band in the wireless video surveillance of Lehman Technology. Please indicate, thank you!
1. Very low frequency: This frequency band belongs to ultra-long wave, its operating frequency is 3-30KHz, and its propagation characteristics are mainly space waves;
2. Low frequency: This frequency band belongs to long wave, its operating frequency is 30-300KHz, and the propagation characteristic is mainly ground wave;
3. Intermediate frequency: This frequency band belongs to medium wave, its operating frequency is 0.3-3MHz, and its propagation characteristics are ground wave and sky wave;
4, high frequency: This frequency band belongs to the short wave, its working frequency is 3-30MHz, the propagation characteristic is the sky wave and the ground wave;
5, VHF: This frequency band belongs to Mibo, its operating frequency is 30-300MHz, the propagation characteristics are spatial waves;
6, ultra-high frequency: This frequency band belongs to the decimeter wave, its operating frequency is 0.3-3GHz, the propagation characteristic is the spatial wave;
7, special high frequency: This frequency band belongs to the centimeter wave, its operating frequency is 3-30GHz, the propagation characteristic is the space wave;
8, extremely high frequency: This frequency band belongs to the millimeter wave, its operating frequency is 30-300GHz, the propagation characteristic is the space wave.
The article comes from the classification of wireless microwave frequency band in the wireless video surveillance of Lehman Technology. Please indicate, thank you!
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