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3G antenna effect and location
Aug 14, 2017

Radio transmitters output RF signal power, through the feeder (cable) to the antenna, by the antenna to electromagnetic radiation out. After the electromagnetic wave arrives at the receiving address, it is received by the antenna (only a small fraction of the power is received) and fed via a feeder to the radio receiver. It can be seen that the antenna is a major radio device that emits and receives electromagnetic waves, and there is no antenna and no radio communication. Antenna variety, for the same frequency, not the same use, not the same occasion, not the same request is not the same case. There are many types of antennas, the appropriate classification is necessary: according to the use of classification, can be divided into communication antenna, TV antenna, radar antenna; according to job frequency classification, can be divided into shortwave antenna, ultrashort wave antenna, microwave antenna; Antenna according to the direction of classification, can be divided into omnidirectional antenna, directional antenna, etc .; according to the shape classification, can be divided into linear antenna, surface antenna, etc .;

Radiation of electromagnetic waves

When there is alternating current on the wire, it can emit the radiation of the electromagnetic wave, and the radiation ability is related to the length and shape of the wire. If the distance between the two wires is very close, the electric field is bound between the two wires, so the radiation is very small; the two wires open, the electric field spread in the surrounding space, so radiation enhancement. 4G antenna it is necessary to point out that when the length L of the conductor is much smaller than the wavelength λ, the radiation is very small; the length L of the wire is increased to be comparable to the wavelength, the current on the wire will be greatly increased, radiation.