The principle of coaxial connector?
Release time: 2023-01-09
The emergence and development of any industry is inseparable from the progress of science and technology, which is also the promotion of the industry caused by the continuous expansion of market demand, and promotes the continuous upgrading of products by relevant personnel. Then in the processing industry, this requirement is even more. For example, the processing of coaxial connectors is also moving from traditional technology to more advanced technology processing, so what are its principles? At the same time, what should we pay attention to when using it?
The emergence and development of any industry is inseparable from the progress of science and technology, which is also the promotion of the industry caused by the continuous expansion of market demand, and promotes the continuous upgrading of products by relevant personnel. Then in the processing industry, this requirement is even more. For example, the processing of coaxial connectors is also moving from traditional technology to more advanced technology processing, so what are its principles? At the same time, what should we pay attention to when using it?
Coaxial connectors have several important frequency-dependent characteristics that determine their application potential-skin depth and cut-off frequency. The depth describes what happens to a high frequency signal propagating along a coaxial line. The higher the frequency, the more electrons move to the conductor surface of the coaxial line. The skin effect of the coaxial connector leads to increased attenuation and dielectric heating, resulting in increased resistive losses on the coaxial line. To reduce skin-effect losses, a larger diameter coaxial cable may be used.
Of course, improving the performance of the coaxial connector is a more attractive solution, but increasing the size of the coaxial cable will reduce the frequency that the coaxial cable can transmit. The coaxial cable cutoff frequency occurs when the wavelength of the EM energy exceeds the transverse electromagnetic mode (TEM) and begins to "bounce" along the coaxial line to the transverse electrical mode 11(TE11). This new frequency pattern creates several problems. Since the propagation speed of the new frequency mode is different from the TEM mode, the coaxial connector will reflect and interfere with the TEM mode signal transmitted through the coaxial cable. The size of the coaxial cable should be reduced and the cutting frequency should be increased. Coaxial cables and coaxial connectors are now available for millimeter wave frequencies -1.85mm and 1mm coaxial connectors. It is worth noting that the physical size of the coaxial connector is reduced to accommodate higher frequencies, the loss in the coaxial cable is increased, and the power handling capacity is reduced. Another challenge in manufacturing these very small components is the tight control of mechanical tolerances to reduce significant electrical defects and impedance variations along the lines. This is costly for relatively sensitive cables. The coaxial connector is a broadband transmission line with low loss and high isolation. A coaxial cable consists of two concentric cylindrical conductors separated by a dielectric spacer. The distributed capacitance and inductance along the coaxial line will produce distributed impedance, I .e. characteristic impedance, in the whole structure.
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