The structure of waterproof rf connector is generally divided into metal contact conductor and shell metal.     The different between metal and plastic (nylon TA66) shell :     Mechanical life: The mechanical life of waterproof rf connector refers to the number of times of plug and pull, and the industry standard is usually 500 to 1000 times.The contact resistance, insulation resistance and withstand voltage of the waterproof rf connector should not exceed the specified standard value when the mechanical life of the waterproof rf connector is reached. There is little difference between the metal waterproof rf connector and the plastic rf connector.      Behaviour of electricity: Rated voltage, rated current, contact impedance, insulation resistance, etc., according to the required standard value, this metal is the same as the plastic shell.     Enviromental parameter : The main environmental parameters are ambient temperature, humidity, rapid temperature change, atmospheric pressure and corrosion environment. In the use and storage of waterproof rf connectors, the environment in the process of transportation has a significant impact on its performance, so it is necessary to choose the corresponding metal shell according to the actual environmental conditions will be better than plastic.     Termination method: Termination method refers to the connection between the hardware contact and the wire and cable of the waterproof rf connector male and female coaxial connector. The metal as same as plastic shell, it is divided into solder, crimp, clamp, pierce and screw.     Comprehensive analysis shows that there is little difference between metal and nylon TA66 plastic shell except for shielding function of connector. The cost of plastic is lower than that of metal shell, and the structure is more reasonable.

    When the connector is connected, the pin will be expanded with a certain force, but it is easier to separate. Therefore, it is judged that the coupling force of the electronic connector is larger than the separation force, the interaction between the two forces is easy to cause the connector to wear out. If you want to reduce wear and tear, look at the following good ways：     1.Improve the strength of the gold plating layer on the contact surface which can effectively reduce friction.     2.the contact surface of the RF coaxial connector can be nickel plated and then gold plated, which is a little less frictional than gold plated directly on copper.     3.The thicker the nickel layer, the stronger the wear resistance of the gold plating layer.     4.The smoother the surface of the RF connector is, that is, the lower the roughness, so the friction is very small.     5.In the daily use of connectors, we should pay attention to the maintenance of electronic connectors to reduce human damage.

    Connectors are important components that connect two devices,Used to transmit or receive signals and is an essential item,With the development of domestic science and technology and continuous improvement,Domestic connector has gradually replaced the foreign connector,Become the brand type that domestic consumer likes quite.     Domestic rf connectors in the use of the process of a total of three advantages, respectively as follows:     First, it is easy to maintain and can improve the production process.     Because of the existence of domestic coaxial connectors, not only simplify the process of mass production, improve the work efficiency of the enterprise, at the same time when a certain component problems, but also can be replaced quickly, so as to reduce the loss caused by the damage of parts.     Second, upgrading is more convenient.     For the equipment, the upgrade may be slow, but for the domestic rf connector assembly components, it is easier to upgrade, and the connector upgrade will naturally drive the change of other equipment, so as to achieve the effect of enterprise upgrading equipment.     Third, the design is more flexible.     According to statistical data, since there is a domestic connector, China’s designers in the design process, flexibility than before 20%, and this saves 20%, not only improve work efficiency, but also save a lot of cost expenditure, for enterprises kill two birds with one stone.

1. Mobile communication: refers to the use of wireless channels for mutual communication between moving objects or between moving objects and fixed objects. 2. The three basic elements of the communication network are: RF antenna terminal , transmission system and switching system. 3. Analog communication network (frequency division system): Terminals, transmission and switching systems are all communication networks implemented in an analog way. 4. Digital communication network (time division system): Terminals, transmission and switching systems are all digital communication networks. 5. CDMA: Code Division Multiple Access digital mobile communication. Use different coding methods to achieve multiple access communications. 6. TDMA: time division multiple access digital mobile communication. The use of time division method to achieve multiple access communication. At present, the GSM900/1800MHz repeater developed and produced by our company belongs to the TDMA system of GPS Antennas. 7. Channel: The channel through which the signal is transmitted. 8. Base station (BS): also known as wireless base station/base station of WIFI Antennas. It is a set of equipment that serves a wireless cell (usually an omni-directional or three-sector cell). The base station is in a dominant position in the call processing process. The call processing process includes three main contents: 1. Controlling the mobile station in the control channel and providing common information about system parameters; 2. Providing support for the mobile station to access the network; 3. In the voice The mobile station is controlled in the channel. 9. Repeater station: Repeater station with the same frequency and two-way amplification, also known as the same frequency repeater, the transmission method is transparent transmission. The function is to receive and forward the signal between the base station and the mobile station. 10. Cellular: The shape of the entire communication area service area formed by the adjacent hexagonal wireless cells (also called cellular cells) is very similar to that of a honeycomb, so it is vividly called a cellular network (Cellular System), also called cellular mobile communication. 

    Since the products that need to use the coaxial connector are developed in the direction of appearance refinement, installation simplicity and long service life, the existence of the pin probe connector has well solved the needs of the connector manufacturer, the pin probe connector. Therefore, it has become the favor of many connector manufacturers. After a large number of related tests, the factors affecting the life of the pin probe connection are as follows.     1. Frictional corrosion     The friction of the pin probe connector during operation and the corrosion of various corrosive substances in the working environment are important factors for greatly reducing the life of the pin probe RF connector.     2. Electrical accident     This type of fault generally refers to the connection between the wire and the terminal and is a factor that directly affects the life of the pin probe connector. In order to solve this problem effectively, a new type of reinforced crimping technology has emerged, which is an upgraded version of the previous crimping technology. After testing, this technology can greatly reduce the occurrence of electrical faults, and has gradually begun to be applied in actual production.     3. Plugging problem     The problem of plugging and unplugging the pin probe connector adapter has always been an important factor in the failure. The control of the insertion force is difficult, and it is easy to fall off when it is small, and it will be damaged when it is large. This has always been a big problem in this respect, so many designers can’t think of any good way. The more methods used now are to control different insertion and extraction forces depending on the place of use. Although the application of a part of the pin probe connector can be guaranteed to some extent, this problem cannot be completely solved.

    Both types of coaxial cable and fiber optic cable can be used to transmit video, audio, and other forms of data, and both can provide you with significant advantages and disadvantages when establishing a network.     Deciding which is best for your situation depends on the distance of the connection and the amount of data to be sent. Before repeaters are needed, fiber-optic cables carry data signals. Coaxial cables have higher signal losses, so they should be used for shorter distances. Fiber optic cables carry more information. Fiber optic cables are also significantly more expensive. Compared to coaxial cables, fiber optic cables are found to be less frequent in the environment in which they are used.     Coaxial cable assembly are easy to install and very durable. Because optical fibers have higher and faster data transmission than coaxial cables, they are best suited for professional networks, such as those found in business parks or universities. If you are working on a home installation or a medium-capacity data transmission network, it is best not to use coaxial cables.     Many companies today use cable adapter for their commercial broadband services. The biggest drawback of wired Internet is speed fluctuations. Looking at fiber optic Internet and wired Internet, wired Internet services are usually shared among many users. This means that if a large number of users in the cable area use the Internet to run all bandwidth-intensive applications at the same time, everyone's speed may vary between 100% and 25% of the promised speed.     Many companies today use cable connections for their commercial broadband services. The biggest disadvantage of wired Internet is speed fluctuations. Looking at fiber optic Internet and wired Internet, wired Internet services are usually shared among many users. This means that if a large number of users in the cable area use the Internet to run all bandwidth-intensive applications at the same time, everyone's speed may vary between 100% and 25% of the promised speed.

    As industrial and aerospace applications increasingly rely on electronic equipment, manufacturers of RF microwave cable assembly must expand cable products capable of meeting high reliability standards under a variety of environmental and operating conditions. Areas involved in such high-reliability components include space technology, test and measurement, wireless mobile communications, automotive, medical, and industrial applications. Unfortunately, the definition of high-reliability coaxial cables varies widely in different industries: there are also differences in the judgment of reliability standards and the range of acceptance conditions for reliability in the commercial sector, the automotive industry, the United States and the European Union, which causes When you need to compare cables or equipment from a "high reliability" perspective, it can be overwhelming.     Industry Standard     The benchmarks written by industry standards point to the "minimum specifications" of components and the "minimum level of performance" that the system can provide for cable assemblies. On this basis, manufacturers must produce high-quality cables due to industry competition considerations, in order to surpass the current industry standards in performance indicators, so as to obtain relative product advantages. In other words, on the one hand, industry standards help to ensure that the cables provided by manufacturers are compatible with similar products, and on the other hand, they urge manufacturers to show advantages in terms of performance, installation method or cost. In many people's opinion, the industry standard is compulsory, but strictly following the industry standard in the design and manufacture of coaxial cables should be a spontaneous, rational and win-win move in essence. Better promote interoperability, scalability and more efficient cost savings of communication systems.     What is high reliability?     When it comes to "high reliability", the common understanding is the judgment conclusions obtained through reliability measurements, and the conclusion of this conclusion also needs to take actual equipment and applications into consideration. However, for high-reliability coaxial cables, the reliability of the cables can also be determined by comparing the cable parameters with relevant standards. Reliability is used to measure consistency and reusability. Therefore, when using high-reliability coaxial cable, users not only require the cable assembly to operate normally in a preset way, but also need to achieve stable operation from beginning to end . In the RF industry, "reliability" can be described as the typical performance of the cable, maintaining the proper level of performance during the product's life cycle, without performance degradation or performance loss. In actual use, one or more performance indicators involved in determining the reliability of a cable assembly w...

    RF signal has its own characteristics, so the transmission of signal requires a special medium, the corresponding connector is also very special, here is the main description of the common rf coaxial connector, in accordance with gb11316-89, IEC169 standards, mil-c-31012 and other standards.     First. common coaxial connector and main performance table:     In addition to the above connectors, there are MINI BNC, SL16, C3, CC4 (1.0/2.3), SMZ (bt-43), MIM and other connectors, but mainly some of the company's models.     Second. Selection of common coaxial connectors     BNC is bayonet type for RF connections less than 4GHz and is widely used for instrument and computer interconnections.     TNC is thread connection, similar to BNC in size, operating frequency up to 11GHz, thread for vibration environment.     SMA is the most widely used, impedance of 50 and 75 ohms, 50 ohms, soft cable use frequency is lower than 12.4Ghz, semi-rigid cable up to 26.5 Ghz.     SMB connector is smaller than SMA in size and for fast connection inserts self-locking structure, commonly used for digital communication, is L9 replacement, 50 ohm to 4GHz, 75 ohm to 2GHz.     SMC is a threaded joint and other similar SMBS with a wider frequency range and is commonly used in military or high vibration environments.     N Type connector is screw, air insulation material, low cost, frequency up to 11GHz, often used in test equipment, there are 50 and 75 ohms two.     For dense connections, the MCX and MMCX connectors are small.     BMA for blind plug connections for low power microwave systems up to 18 GHz.     Each connector comes with military and commercial standards. The military standard is made by mil-c-39012, copper parts, PTFE insulation, inside and outside gold-plated, most reliable performance, but at a higher cost.     Commercial standard designs use inexpensive materials such as brass castings, polypropylene insulation, and silver coatings, which are less reliable.     The connector materials are brass, beryllium copper and stainless steel, and the center conductor is usually gold-plated to ensure low resistance and corrosion resistance.Military standards require gold plating on SMA and SMB, and silver plating on N, TNC and BNC, because silver is easy to oxidize and users prefer nickel.     Insulation material has polytetrafluoroethylene, polypropylene and toughened polystyrene, polytetrafluoroethylene insulation performance is the best, but the cost is higher.