1. According to the nature of work, it can be divided into transmitting antenna and receiving antenna.
2. According to the purpose, it can be divided into communication antennas, broadcast antennas, TV antennas, radar antennas, etc.
3. According to the working wavelength, it can be divided into ultra long wave antenna, long wave antenna, medium wave antenna, short wave antenna, ultra short wave antenna, microwave antenna, etc.
4. According to the structure and working principle, it can be divided into line antennas and surface antennas. The characteristic parameters describing the antenna are the pattern, directivity coefficient, gain, input impedance, radiation efficiency, polarization and frequency.
Antennas can be divided into two types according to the number of dimensions: one-dimensional antennas and two-dimensional antennas. One-dimensional antennas are composed of many wires. These wires are either straight lines used in mobile phones, or some smart shapes, just like cables. Old bunny ears previously used on TV sets. Monopole and dual-stage antennas are the two most basic one-dimensional antennas. Two-dimensional antennas vary widely, including sheet-like (a square piece of metal), array-like (a bunch of pieces in a well-organized two-dimensional pattern), as well as horn-like and dish-like shapes.
The base station antenna plays a very critical role in the entire communication system, especially the communication station as a communication hub. Commonly used base station antennas include glass fiber reinforced plastic high-gain antennas, four-ring array antennas (eight-ring array antennas), and directional antennas.
According to the above. There are some that affect the effect of the antenna. Natural objects, such as mountains, trees, houses, etc. There is also the weather, because the clouds reflect the antenna. The second is the mutual interference of antennas. Finally, there are other electromagnetic interferences, such as cell phone towers, TV towers, and broadcast towers.
Post time: Dec-13-2021