Antenna classification

Antenna classification

1, according to the nature of work can be divided into transmitting antenna and receiving antenna.

2, according to the use can be divided into communications antenna, radio antenna, TV antenna, radar antenna.

3, according to the direction can be divided into omnidirectional antenna and directional antenna.

4, according to the working wavelength can be divided into long-wave antenna, long-wave antenna, antenna, shortwave antenna, shortwave antenna, microwave antenna.

5, according to the structure and working principle can be divided into line antenna and surface antenna. Describe the antenna characteristics of the parameters of the directional pattern, the directivity coefficient, gain, input impedance, radiation efficiency, polarization and bandwidth

6, according to the number of points can be divided into two types: one-dimensional antenna and two-dimensional antenna

One-Dimensional Antenna: Consists of a number of wires, either as straight lines used on a cell phone or some smart shape, like the old rabbit's ear used on a television before the cable appears. Unipolar and two-stage antennas are the two most basic one-dimensional antennas.

Two-dimensional Antenna: Varied, there are flake (a square metal), the array (well-organized two-dimensional mode of a beam), as well as trumpet-shaped, dish.

7, Antenna According to the use of different occasions can be divided into: handheld antenna, car antenna, base antenna three categories.

Handheld Antenna: Antenna is the personal use of handheld walkie-talkie, a common rubber antenna and rod antenna two broad categories.

Car antenna: refers to the original design and installation of communication antennas in the vehicle, the most common application is the most common suction cup antenna. Car antenna structure is also shortened, a quarter-wavelength, the central sense of the flu, five-fifths wavelength, one-half wavelength and other forms of antenna.

Base Station Antenna: It plays a crucial role in the whole communication system, especially as a communication station as a communication hub. Commonly used base station antennas are high-gain glass fiber reinforced antenna, four-ring array antenna (eight ring array antenna), directional antenna.