In the antenna mast products, both antenna and antenna masts, and the introduction to this kind of product that is not yet, still a blank, so this day just borrow site update this opportunity, to the side surface is introduced, so that you can fill the blank in this field, and for us, to learn the knowledge also is very good, can broaden our knowledge, we learned.
Antenna, simply speaking, it is a kind of converter can guide travelling-wave transform into electromagnetic waves, or on the contrary, therefore can be used for radio equipment, used to transmit or receive electromagnetic waves. So for the antenna, it's reversible, and the same antenna can either be used as a transmitter antenna or as a receiving antenna.
1. Classification of antennas
The antenna can be divided into two types: transmitting antenna and receiving antenna.
The antenna can be divided into communication antenna, broadcast antenna, TV antenna and radar antenna.
The antenna can be divided into super long wave antenna, long wave antenna, medium wave antenna, short-wave antenna, ultra-short wave antenna and microwave antenna.
2. Parameters of the antenna
Resonant frequency: it is related to the electrical length of the antenna, and the length is expressed by the wavelength.
Gain: the logarithm of the ratio of the intensity of its radiation direction to the strength of the reference antenna, which is mainly related to "aperture" and "radiation pattern".
Bandwidth: the frequency range of effective work, usually centered on resonant frequency.
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