Antenna classification:

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

It can be divided into the use of communication antennas, radio antennas, antenna, radar antenna.

③according to the working wavelength can be divided into long wave antenna, broadband antenna,antenna, antenna, antenna, UHF and microwave antennas.

The form of the structure and working principle can be divided into line antenna and antenna.

Describe the antenna characteristic parameters of a pattern, directivity, gain, input impedance, radiation efficiency, polarization and frequency bandwidth

Antenna according to the dimension can be divided into two types:

One-dimensional and two-dimensional antenna antenna

Antenna consists of a number of wires, the wires or the like mobiles phones used on the line, or some neatshape, like appeared before cable television use in old Bunny ears. Single and double stage antenna is one of the two most basic antenna.

Two dimensional antenna diversity, sheet ( a square metal ), array shape ( organization of two-dimensional patterns of a bundle of sheets ), and trumpet-shaped, dish.

Antenna according to different occasions can be divided into:

A hand-held, vehicle mounted antenna, base station antenna antenna three categories.

Handheld wireless station is the personal use of handheld walkie-talkie antenna, common rubber antenna and a whip antenna two categories.

Vehicle mounted antenna refers to the original design and installation in the vehicle communications antenna, the most common application is most commonly suction vehicle antenna structure also has ashorter wavelength, type, 1/4 central loading type, 5/8 wavelength, double 1/2 wavelength antenna in the form.

Base station antenna in the whole communication system is very important, especially as a communications hub of communication station.

Common base station antenna with high gain antenna, glass steel ring array antenna (eight ring array antenna, a directional antenna ).