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Different kinds of antennas are used in different occasions
You should also know that the set-top boxes and routers we usually use have wireless functions, but do you know that they are also composed of different antennas? Today, Xiaobian will classify all antennas of electronic antenna manufacturers.
1. It can be divided into transmitting antenna and receiving antenna according to their working properties.
2. It can be divided into communication antenna, broadcast antenna, TV antenna, radar antenna, etc. according to the use.
3. According to directivity, it can be divided into omnidirectional antenna and directional antenna.
4. 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.
5. According to the structure and working principle, it can be divided into line antenna and surface antenna. The characteristic parameters of the antenna include pattern, directivity coefficient, gain, input impedance, radiation efficiency, polarization and bandwidth.
6. According to the dimension, it can be divided into two types: one-dimensional antenna and two-dimensional antenna
One dimensional antenna: composed of many wires, these wires are either like straight lines used in mobile phones, or some smart shapes, like the old rabbit ears used in TV sets before the emergence of cables. Monopole and bipolar antennas are two basic one-dimensional antennas.
Two dimensional antenna: there are various types, including sheet (a square metal), array (a beam of organized two-dimensional mode), horn and dish.
7. Antennas can be divided into three categories according to different applications: Handheld station antenna, vehicle antenna and base antenna.
Handset antenna: it refers to the antenna for personal use of handheld walkie talkie. There are two common types: rubber antenna and rod antenna.
On board antenna: refers to the communication antenna originally designed to be installed on the vehicle, and the common application is the sucker antenna. In the structure of vehicle mounted antenna, there are also shortened type, quarter wavelength, middle enhanced type, five eighth wavelength, double half wavelength and other forms of antenna.
Base station antenna: it plays a very key role in the whole communication system, especially the communication station as the communication hub. Common base station antennas include FRP high gain antenna, four loop array antenna (eight loop array antenna) and directional antenna.