What is a radio frequency coaxial connector
Radio frequency coaxial connectors (also called radio frequency connectors or RF connectors, in fact, strictly speaking, radio frequency connectors are not completely equivalent to coaxial connectors. Radio frequency connectors are classified from the perspective of the frequency of use of the connector. Shaft connectors are classified from the structure of the connector. Some connectors are not necessarily coaxial, but they are also used in the radio frequency field. Coaxial connectors can also be used in low frequencies.
For example, a very common audio headphone plug, the frequency does not exceed 3MHz. From a traditional point of view, radio frequency refers to the MHz category. Nowadays, coaxial connectors are often used in the microwave field and the GHz category. The term “radio frequency” has always been used. Overlaid on the term “microwave”), it is a branch of the connector, which has the commonality of the connector and its particularity.
The coaxial connector has an inner conductor and an outer conductor. The inner conductor is used to connect the signal line and the outer conductor is not only the ground wire of the signal line (reflected on the inner surface of the outer conductor), but also plays a role in shielding the electromagnetic field (shielding the internal electromagnetic waves from the outside Interference works through the inner surface of the outer conductor, and shielding the external electromagnetic field from the internal interference works through the outer surface of the outer conductor). This feature gives the coaxial connector a lot of space and structural advantages. The outer surface of the inner conductor of the coaxial connector The inner surface of the outer conductor and the outer conductor are basically cylindrical-special cases are often required for mechanical fixing, and have a common axis, so they are called coaxial connectors.
Among the several forms of transmission lines, coaxial cables are commonly used due to their outstanding advantages (simple structure, high space utilization, easier manufacturing, superior transmission performance…) to connect coaxial cables. The demand for cables, the application of coaxial connectors was born. Due to the superiority of the coaxial structure, the continuity of the characteristic impedance of the (coaxial) connector (compared to other connectors) is more easily guaranteed, the transmission interference and interference (EMI) are very low, and the transmission loss is almost unique. The ground is used in radio frequency and microwave fields. And because it is almost absolutely used at high frequencies, it produces some electrical performance requirements that are different from other connectors.
