The most important factor affecting the effect of the antenna


Release time:

2019-09-27

The most important factor affecting the effect of the antenna

① according to the nature of the work can be divided into transmitting antenna and receiving antenna.
According to the purpose, it can be divided into communication antenna, broadcast antenna, TV antenna, radar antenna, etc.
According to the working wavelength, it can be divided into ultra long wave antenna, long wave antenna, medium wave antenna, short wave antenna, ultrashort wave antenna, microwave antenna and so on.
According to the structure and working principle, it can be divided into line antenna and surface antenna. Describe the characteristic parameters of the antenna, such as pattern, directivity coefficient, gain, input impedance, radiation efficiency, polarization and frequency
Antennas can be divided into two types by dimension:
Antenna
One-dimensional antenna and two-dimensional antenna
The one-dimensional antenna consists of many wires, which are either straight lines like those used on mobile phones, or some smart shapes, like the old rabbit ears used on TV before the appearance of cables. Monopole and dual stage antennas are two of the most basic one-dimensional antennas.
Two-dimensional antennas vary from sheet-like (a square piece of metal) to array-like (a bundle of well-organized two-dimensional patterns) to trumpet-like and dish-like.
According to the use of different occasions can be divided:
Handheld antenna, vehicle antenna, base antenna three categories.
Handheld antenna is the personal use of handheld radio antenna, common rubber antenna and rod antenna two categories.
Vehicle antenna refers to the original design installed on the vehicle communication antenna, the most common application is the most common suction cup antenna. The vehicle-mounted antenna structure also has a shortened type, a 1/4 wavelength, a central plus sensing type, a 5/8 wavelength, a dual 1/2 wavelength and other forms of antenna.
The base station antenna plays a very important role in the whole communication system, especially the communication station as the communication hub. Commonly used base station antenna has glass fiber reinforced plastic high gain antenna, four ring array antenna (eight ring array antenna), directional antenna.

According to the above. The effect of the antenna is affected. Natural objects, such as mountains, trees, houses, etc. There is also the weather, because the clouds will have a reflective effect on the antenna. The second is the mutual interference of antennas. Finally, other electromagnetic interference, such as cell phone tower, TV signal tower, broadcast signal tower.

Keywords: digital TV antenna, vehicle antenna, RF line/feeder, suction cup antenna