Coaxial connector and plug and socket thereof

Abstract

The invention relates to the field of electrical connectors, in particular to a coaxial connector and a plug and a socket thereof. The coaxial connector comprises the plug and the socket, wherein the plug comprises an outer plug conductor and a connection nut; the connection nut is rotationally assembled on the outer plug conductor; the socket comprises an outer socket conductor; the outer plug conductor is provided with an insertion part which is used for inserting of the outer socket conductor; a set distance is formed between the outer wall surface of the insertion part and the inner wall surface of the connection nut; a thickening part is arranged on an outer layer of the insertion part; expansion parts matched with the thickening part are arranged in holes of the outer socket conductor and the connection nut; the set distance is the distance between the outer side surface of the thickening part and the inner wall surface of the expansion part in the hole of the connection nut; and an outer thread matched with the connection nut is formed in the outer socket conductor. By the coaxial connector, the strength, the reliability and the characteristic impedance can be improved under the condition of not increasing the boundary dimension of the SMA radio-frequency coaxial connector and reserving the mechanical property and the environmental resistance of the SMA connector.

Description

technical field [0001] The invention relates to the field of electrical connectors, in particular to a coaxial connector and its plug and socket. Background technique [0002] The SMA series RF coaxial connector is a widely used small threaded coaxial connector, suitable for connecting RF cables or microstrip lines or other microstrip circuits in RF circuits of electronics, microwave equipment and digital communication systems, etc. It has the characteristics of wide frequency range, excellent performance, small structure size, and is suitable for matching with microstrip circuits. [0003] The main components of the plug of the existing SMA series radio frequency coaxial connector assembly include a central conductor, an insulating medium, an outer conductor and a connecting nut that are coaxially arranged sequentially from the inside to the outside, wherein the central conductor, the insulator and the outer conductor form The microwave transmission path is used to realize...

AI Technical Summary

Problems solved by technology

In the prior art, due to the strict restrictions on the dimensions of the SMA connector, on the one hand, the dimensions of the connecting nut are limited to standard values, and on the other hand, the wall thickness of the outer conductor of the socket is also limited to standard values. , thereby limiting the distance between the inner wall of the connecting nut and the part of the outer conductor of the plug that is used to be mated with the socket, so that the wall thickness of the part of the outer conductor of the plug that is used to be mated with the socket is limited, not only There are problems of low strength and poor reliability, and it also affects the characteristic impedance of the connector. In view of the above reasons, there is currently no screw-connected radio frequency at home and abroad that can reach 6GHz and characteristic impedance can reach 75Ω in line with international or domestic standards. Coaxial Connector Products

[0004] In addition, in the current SMA series RF coaxial connector assembly, the inner and outer conductors of the plug and the inner and outer conductors of the socket have the situation that the inner conductor has begun to contact when the outer conductor has not been completely aligned, which will There may be a radial position deviation or deflection between the inner conductors, and forced insertion will cause damage to the inner conductors

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