Some Trivia About Antennas
2023-12-26
Antennas are an important and indispensable part of any radio communication system.
Although the tasks to be performed by various types of radio equipment are different, the role of the antenna in the equipment is basically the same.
Any radio equipment transmits information through radio waves, so it is necessary to have devices that can radiate or receive electromagnetic waves.
Therefore, the first role of the antenna is to radiate and receive electromagnetic waves. Of course, can radiate or receive electromagnetic waves of things that can not always be used as an antenna.
Another function of the antenna is "energy conversion".
As we all know, the transmitter through the feeder into the antenna is not a radio wave, the receiving antenna can not directly send radio waves into the receiver, where there is an energy conversion process, that is, the transmitter generated by the high-frequency oscillating current through the feeder into the antenna input, the antenna should be converted to high-frequency current into high-frequency electromagnetic waves in space, in the form of a wave of radiation to the surrounding space.
Conversely, when receiving, also through the receiving antenna to intercept the high-frequency electromagnetic wave energy into high-frequency current energy, and then sent to the receiver. Obviously, there is a conversion efficiency problem.
The higher the antenna gain, the higher the conversion efficiency.
Although the tasks to be performed by various types of radio equipment are different, the role of the antenna in the equipment is basically the same.
Any radio equipment transmits information through radio waves, so it is necessary to have devices that can radiate or receive electromagnetic waves.
Therefore, the first role of the antenna is to radiate and receive electromagnetic waves. Of course, can radiate or receive electromagnetic waves of things that can not always be used as an antenna.
Another function of the antenna is "energy conversion".
As we all know, the transmitter through the feeder into the antenna is not a radio wave, the receiving antenna can not directly send radio waves into the receiver, where there is an energy conversion process, that is, the transmitter generated by the high-frequency oscillating current through the feeder into the antenna input, the antenna should be converted to high-frequency current into high-frequency electromagnetic waves in space, in the form of a wave of radiation to the surrounding space.
Conversely, when receiving, also through the receiving antenna to intercept the high-frequency electromagnetic wave energy into high-frequency current energy, and then sent to the receiver. Obviously, there is a conversion efficiency problem.
The higher the antenna gain, the higher the conversion efficiency.
ZD Power Amplifier Module Development
Scientific knowledge-Difference between combiner and multiplexer
