Coaxial arrester is a kind of common protection device in the antenna-fed system, which protects the back-end equipment by releasing the high RF voltage to the ground. Today we are going to disassemble a poly Frost's coaxial arrester to see the mysterious inner structure of the coaxial arrester.
This is the protagonist we are going to dismantle today--poly Frost Is-mu50ln, 2.4-3 0G, maximum withstand power of 100 watts.
With a screwdriver to remove the surface of the four screws, Coaxial Lightning Arrestor the surface cover and the shell combination is very close, with the blade of the wallpaper knife along the gap into the surrounding, slowly pry open the lid, lift up your hijab.
is not good simple good simple ah, this is the value of hundreds of yuan coaxial arrester? Indeed, this is the coaxial arrester.
The working principle is that the antenna signal is transmitted by coupling the capacitance of the two bronze pieces to the device, or from the device transmitting the wave through the capacitor to the antenna. How do you avoid thunder? Oh, the original transmitter section of the line through an inductance isolated AC signal after the connection to the gas discharge tube, is that white dongdong, and then to the shell, Coaxial Lightning Arrestor arrester shell grounding, so high voltage is leaked to the ground.
The coaxial arrester comprises a transverse shell and a longitudinal shell having a perpendicular, an insulator and a transverse central conductor arranged in the transverse shell, and a coaxial joint at both ends of the transverse shell and the transverse center conductor, the longitudinal shell body is provided with a longitudinal central conductor, the lower end of the longitudinal center conductor is connected with the transverse center conductor, the longitudinal center conductor is a hollow tubular structure, Coaxial Lightning Arrestor the inner and outer spiral groove is opened on the pipe wall, and the internal thread is arranged in the longitudinal shell, and the longitudinal shell is provided with a The upper end of the longitudinal center conductor is connected with the nut in the longitudinal shell. After adopting the above structure, the required electrical performance parameters can be obtained with shorter longitudinal lengths. The shorter longitudinal center conductor has better stability, and the whole longitudinal center conductor has some flexibility in the axial upward, which can maintain the contact pressure, improve the reliability of the connection and facilitate the adjustment of the performance parameter.