This paper proposes several solutions for RF coaxial connector compatibility upgrade, including I, II, III and IV. The common feature of the I scheme, the II scheme, the III scheme and the IV scheme is that the electrical reference surface and the electrical signal are electrically connected, and the elastic contact is included to make it conductive. This product has a very low and stable dynamic intermodulation characteristic value, and is not affected by the connection torque and axial clearance. It also implements the dual function of a quick-connect connection and a threaded connection; it has compatibility with the threaded connection of the old version. It can also realize the characteristics of the plug and the RF cable following the connection between the socket and the plug; it can effectively prevent the screw sleeve from being loosened, or prevent accidents that may be sprained or even spoiled when the RF cable is subjected to a large torque. . The RF connector is an important connection and disconnection component in the microwave transmission system. At the same time, it is also the interface (or port) component of various RF circuits in the microwave transmission system. It must be globally compatible and interchangeable to have vitality. The IEC international standard coaxial connector has been developed and developed over the past century. There are hundreds of standard interface (or port) interfaces, also known as standard models, which are derived from non-standard models. Even more is countless. With the continuous development of wireless communication industry around the world, especially in recent decades, its RF coaxial connector has been continuously developed and upgraded; however, the technical transformation of communication equipment is continuous, that is, old The equipment has been upgraded step by step, and the new equipment is being updated step by step. As the connection and disconnection component of the wireless communication microwave transmission system—the RF coaxial connector, its electrical performance, mechanical performance and environmental resistance are unprecedented. The new technical requirements (that is, the old technical indicators can not meet the technical requirements of the new equipment), at the same time, also put forward the challenge of compatibility upgrade design. Therefore, the RF coaxial connector that meets the new requirements and the RF coaxial connector that will be eliminated, the port interface compatibility upgrade design is indispensable to fall on the industry arm of RF interconnect components at home and abroad. The typical standard interface interface structure of the existing IEC international standard RF coaxial connector is shown in Figure 1: Figure 1. Typical standard interface interface structure The socket 1 is composed of a socket outer conductor 11, a socket inner conductor 12 and a socket insulating support 13; the plug is composed of a plug outer conductor 21, a plug inner conductor 22, a plug insulating support 23, a plug sealing ring 24 and a screw sleeve 25. When the socket is connected to the plug, the internal thread 251 on the screw sleeve 25 and the external thread 110 on the outer conductor 11 of the socket are screwed together; the mechanical and electrical reference surface 1212 is disposed on the shaft end surface of the plug outer conductor 21 and the socket. The bottom surface of the conductor 11 is sealed, and the seal ring 24 is compressed to maintain the gap 1010a. However, RF coaxial connectors of this type have the following drawbacks and deficiencies in terms of new requirements for modern communication equipment: 1. It is impossible to realize the connection quick insertion and disconnection quick release, which causes many defects and damages in construction installation and debugging, as well as production and testing. 2. The important intermodulation indicators required by modern communication equipment require sufficient pre-tightening force to maintain the good intermodulation index; however, if the pre-tightening force is insufficient or the thread is slightly slack, the intermodulation interference will occur randomly; Excessive preload also often damages the contact area, ie the silver plating on the mechanical and electrical reference surfaces (the plating is crushed/cracked), damaging the contact resistance and electrical continuity of the RF electrical signal, resulting in contact failure. The occurrence or aggravation of sex makes the intermodulation indicators worse. At the same time, it also reduces the service life of the product. 3. In the prior art, although the design of the outer conductor is separated from the electrical reference plane, the outer conductor is only a slotted split design, which increases the manufacturing cost and the interconnection between the outer conductors. The design has no gap; however, in the vibrating environment, the electrical contact area of ​​the latched RF connector will also randomly wander (the signal current path is disordered); thus, the electrical signal drifts. Make intermodulation performance and return loss performance turbulent. 4. Since the socket is generally installed at the device port, the plug is connected with the RF cable; the RF cable with a considerable length during construction and installation will inevitably be rotated. At this time, the RF plug that has been tightened by the screw sleeve cannot follow the rotation; the consequence is The screw that has been tightened may be loosened, or the RF cable may be sprained or even spoiled. This article is about a high-compatibility fast-locking RF coaxial connector: it has the dual function of threaded and quick-connect connection compared with the prior art products; it has the characteristics of compatibility with the old version; it is stable and reliable. The advantages of the dynamic intermodulation index and the return loss index; the characteristics of the plug random rotation to prevent the looseness of the thread or the sprain of the RF cable (twisted). At the same time, simple and reliable structural design is achieved to achieve the purpose of effectively reducing manufacturing costs and improving manufacturing precision. The high compatibility and fast locking RF coaxial connector can be upgraded in various ways. For the convenience of description, we define I, II, III and IV solutions; the common feature is the socket 1a. 1b includes outer conductors 11a, 11b; inner conductor 12; and insulating support 13. The I, II, and III schemes are characterized in that the plugs 2a, 2b, 2c include outer conductors 21a, 21b, 21c; the inner conductor 22; the insulating support 23; the sealing ring 24; the unlocking sleeve 25a; the compression spring 26a; 27a; circlip 28a. The IV scheme is characterized in that the plug 2d includes an outer conductor 21d, an inner conductor 22, an insulating support 23, a sealing ring 24, and a screw sleeve 25b. The I, II, III, and IV schemes are also characterized in that the electrical signals of the electrical reference planes 1212b and 1212c are electrically connected, including the contacts of the resilient contacts 211b, 111b, 211a, and 111c. Conducted. The outer conductors 11a, 11b are also characterized in that an external thread 110 is provided on the outer circumference; a V-shaped groove 111a is provided in the middle of the external thread 110. The outer conductors 11a, 11b of the sockets 1a, 1b are coupled to the front end face of the hole, and the outer conductors 21a, 21b, 21c of the plugs 2a, 2b, 2c are coupled to the bottom end surface of the shaft, and the common feature is that the front end The face and the bottom end face are provided as mechanical reference faces 1212a.
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