Coaxial connector, (some people also call it radio frequency connector or RF connector. In fact, radio frequency connector is not exactly equivalent to coaxial connector. Radio frequency connector is from the perspective of the frequency of use of the connector. Coaxial 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, such as common audio earphones. 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. In the GHz category, the term radio frequency has always been used, overlapping 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 The interference acts on the inner surface of the outer conductor, and the shielding of the external electromagnetic field from the internal interference acts on the outer surface of the outer conductor. This feature gives the coaxial connector great space and structural advantages. The outer surface of the inner conductor of the coaxial connector and the inner surface of 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 because of their outstanding advantages (simple structure, high space utilization, easier **, and superior transmission performance). Demand, the coaxial connector will be applied. Due to the superiority of the coaxial structure, the continuity of the characteristic impedance of the (coaxial) connector (relative 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. Different from the electrical performance requirements of other connectors.
