Compared with other electronic components, RF connectors have a short history. The UHF connector, which appeared in 1930, was the earliest RF connector.To the second world war, because of the war, with the development of radar, radio and microwave communication, the N, C, BNC, TNC connector series, such as medium, appeared after 1958 the miniaturization of products such as SMA, SMC, SMB connector, in 1964 established the United States military standard MIL - C - 39012 "standard of RF coaxial connector total", from then on, the RF connector began to develop in the direction of standardization, seriation, generalization.     The United States, the United Kingdom, France and other countries RF connector development technology is in a leading position, its design, production, testing, use of technology has become a complete set, tends to improve, not only formed a complete standard system, and raw materials, auxiliary materials, testing system, assembly tools and other has been standardized, and professional scale production.RF connector has gradually shown its own professional characteristics:     1. More varieties: more than 20 international series, more varieties.     2. Rely on mechanical structure to ensure electrical characteristics, is an mechatronics products, and other low-frequency connectors are fundamentally different.     3. The parts processing is mainly the turning machine processing, the assembly manual work is too much, it is difficult to carry out automatic assembly.     4. Product upgrading is slow.     5. It is an important part of the electrical connector and a labor-intensive product with certain technical content.     6. Product reliability, failure mode and failure mechanism are complex.     With the development of science and technology, RF connector appears more and more important, new technology and new products emerge in an endless stream.The rf coaxial connector industry will be a big market.

The Process of RF Cable Assembly : 1. Cutting line: check whether the specifications and models of the wires are correct;Whether the size meets the requirements;The cut must be level, not scratch the wire, the wire is not dirty and so on. 2. Skin peeling: check whether the skin opening is flat, and do not peel the damaged core wire, braided wire, etc., and whether the skin size is correct. 3. Marshalling treatment: trim the size correctly, trim flat, and do not hurt the core wire while trimming the marshalling. 4. Endothelial peeling: check whether the peeling opening is flat;Whether the peeling size is correct;There is no stripping core wire, broken copper wire;The insulator shall not come off when half stripped. 5. Sleeve shrinkage tube: check whether the size and type of shrinkage tube are correct. 6. Prepare soldering tin: check whether the temperature of the tin furnace is correct;Before preparing solder, whether the core wire copper wire is arranged, whether there is a fork, bending, discounting phenomenon;After preparing solder whether there are copper wire bifurcation, big head, copper wire and scalded insulation skin phenomenon. 7. Solder: check the temperature of the electric soldering iron is correct;Do not burn insulation skin, tin point should be smooth, wuxi tip, not fake welding, virtual welding. 8. Terminal pressing: confirm whether the specification of terminal and wire is correct;Whether the terminal is pressed too long or too short with or without bell-mouth, tilt, insulation and core wire exposed. 9. Terminal insertion: check whether the connector and terminal model are correct;Whether the terminal is damaged or deformed;Whether the terminal is missing, wrong, not in place and so on. 10. Line pressing: check whether the RF connector model is correct;Whether the alignment direction is correct;Whether the core wire is damaged, exposed copper or scalded;Whether the compression is in place. 11. Blow shrink tube: if the shrink tube is in good condition, do not burn the insulation skin. 12. Assembly shell: whether the shell is wrongly installed, whether there is any scratch or rough edge, whether there is any missing assembly part, whether there is any screw with unscrewed hair, oxidation, discoloration, looseness, etc., and no bad anastomosis after RF connector assembly;If the shell is oriented, it must be assembled according to the requirements. 13. Labeling: check whether the content of the label is correct, clear and without hyphenation;Whether the size of the label is correct;Whether the label is dirty or damaged;Whether the label is pasted in the correct position. 14. Tie tape: check whether the specification, color and position of tie tape are correct;No fracture or loosening. 15. Injection molding: check whether there is dirt on the mold, whether there is lack of materials, bubbles, bad adhesion, bad hardening, etc. 16. Plug molding: check whether the plug molding is damaged, uneven, lack of materials, rough edges, sundries,...

    In the field of wireless communication, microwave RF test cable is a kind of commonly used high-precision system test consumable, which is used in conjunction with test instruments.      Any DUT is located between the signal generator and the analyzer, and the bridge between the DUT and the instrument is the test attachment or test system.Do not neglect these test accessories, when possible, it is best to solidify these test accessories into a standardized measurement system.When the instrument supplier provides the complete machine, the maximum test cable will be provided in accordance with the highest operating frequency of the instrument.However, in the real test process, there will be a variety of different situations that require the use of different attachments, all of which will affect the accuracy of the measurement results, which requires the tester to have an in-depth understanding of the relevant test attachments.     When selecting the specification of the cable in the test system, in addition to considering insertion loss and VSWR, the stability of the cable must be better.In the frequency and microwave frequency bands, the commonly used cables are divided into semi-rigid cables, semi-flexible cables and flexible braided cables.Flexible cable as a "test - level" cable.Compared with semi-rigid and semi-flexible cables, the cost of flexible cables is relatively high, which is because more factors should be considered in the design of flexible cables.Flexible cables that are easy to bend multiple times and still maintain performance are essential for testing cables.Soft and good electrical indicators are a pair of contradictions, is also the main reason for the increase in costs.The flexible cable must be stable in amplitude and phase under bending conditions.     Generally speaking, single-stranded inner conductor cable is conducive to amplitude stability;Multi-strand inner conductor cable is conducive to the stability of the phase, it can be seen that only these two indicators are difficult to complete..Pay attention to the joint and cable connection parts of the process, which will affect the life of the cable.In this area, the traditional cable and connectors between a hard point of contact, it is easy to cause the fracture of the cable, which is most of the test engineer in the use of traditional cable testing the most headache problem in the process, and this is not a simple use heat shrinkable casing can solve, because this kind of fracture is often hard contact test cable after frequent bending, tension by cable transmission to hard contact, aging and rupture caused by hard contact.It is needless to say that the traditional flexible test cable without armoring can not effectively extend the service life of the test cable even if the enhanced heat-shrinkable sleeve is used at the cable and the joint because there is no armoring protection.     However, due to the gap betw...

    From the application field, the largest market segment of RF connector adapters is telecommunications or data communication, consumer electronics and electronic computers and peripheral equipment.The second is automobile, industrial automation and instrumentation.connector adapters are less important in China's domestic market than globally;The third largest market is medical equipment, aerospace military, railway and traffic control, and power supply and distribution equipment.      The importance of RF coaxial connector adapters in electronic systems is often underestimated.Many designers of electronic systems have had similar experiences: using the cheapest connector, but often ending up paying more.Faulty connector selection and use can result in system failure, product recall, product liability cases, circuit board damage, rework and repair, which in turn can lead to sales and customer loss.Therefore, in the design of electronic products, please do not underestimate the importance of connector adapters, or it will only be penny wise and pound foolish.The importance of selecting a suitable connector for electronic devices can be seen.     So, how do you choose a connector adapters?Due to the impact of the economic crisis, cost will be taken into account in the design, but in addition, more attention should be paid to the high quality and stability of the product, as well as the design characteristics of the connector itself.I think the following aspects of the innovative design of ERNI connector can provide some reference for electronic designers:     First: the idea of dual-rod design.In the ERNI connector series, the dual rod design idea runs through the whole process.Figuratively speaking, the double bar design can be described as "kill two birds with one stone".Optimized terminal design ADAPTS to high speed signal transmission and provides higher directional tolerance.In comparison of inductance, capacitance, impedance, etc., the two-bar terminal structure is reduced for high-speed applications and optimized to minimize discontinuity.The dual rod design allows multiple connector adapters to be placed on a single circuit board without plug or short circuit problems, eliminating the need for a large number of signals on a single connector.The simple wiring of the two rods can save space, make the connector smaller and simplify the detection of welding pins.Like 12 on a board.It also reduces rework costs.Practical applications such as telecommunication end-user equipment.     Second: design of pin without depression in assembly process.Traditional stamping will cause bending or deformation pin due to improper handling, the bending process will cause capillary cracks, from the long-term product is not desirable, but also affect the circuit performance and cost.ERNI USES the direct stamping to the bending Angle, the stamping terminal can avoid the capillary crack caused by the ben...

    Main name:     The main nomenclature of the RF coaxial connector adopts the international common nomenclature nomenclature, and the nomenclature of the different structural forms of the specific product is specified by the detailed specification.     Structural form code:     Table 1: classification of structural forms and codes (separated by "-")     Example of model composition of RF connector:     Example 1: SMA-JW3 represents SMA connector bent radio frequency plug, the conductor of the plug is the pin contact, with syv-50-2-1, RG316/RG316D, sff-50-1.5-1 and other radio frequency cables.     Example 2: SMA - 75 JHD said SMB straight type ha ha the impedance of the condensation on the circuit board is 75 Ω radio frequency socket.     Model name and composition of adapter:     Adaptor and impedance adaptor models are derived from the plug or socket models. Generally, the main designation of the adaptor model is indicated by the connector master designation (within the series adaptor) or in the form of a score (between the series adaptor).     Case 1: SMA - JK said adapter in the SMA type 50 Ω series, end of the needle of the side hole for contact and contact.     Case 2: N/SMA - JK says end for N type needle contact element, the other end for SMA type hole contact element, the impedance of 50 Ω adapter.     Example 3: SMB said end of 50 to 50 j / 75 k Ω needle contact element, the other end of the 75 Ω hole contact type of SMB adapter.

    Many customers do not know how to weld after purchasing a part of the N type rf coaxial connector. In this regard, ROHO will teach you step by step to practice the welding knowledge of N type RF coaxial connector.     Step 1: peel the cable and decompose the N connector, put on the connector, gasket and washer.     Step 2: install the gasket on the shielding first.     Step 3: peel off the insulation of the exposed wire.     Step 4: Put a pin on it, not too long or too short.     Step 5: put the main body of the connector and observe the correct position of the pin.     Step 6:Tighten with a wrench.

    The waterproof RF coaxial connector is usually working in the water.and they are waterproof. The power cable and net cable can be put in their internal.They can not only provide normal and reliable power,single transmission,but also can be waterproof ans dust-proof.     At present.The standard for waterproof is according to IP waterproof grade standard.You can see the number XX after IPXX to estimate the waterproof performance, The first number X is from zero to six.the maximum is 6,The second number is from zero to eight,so the maximum waterproofing grade is IP68.     With the development of technology,We use many application in our daily life.And the thing with electric are not very good at our safety.so It’s very important if the the application is waterproof.The waterproof connector has excellent sealing performance,reliable waterproof performance,For example,some device need to be fixed in the water or at the button of the water,Then if we use waterproof RF coaxial connectors,we don’t need to worry about the water especially the water contains many chemical substances destroy the devices.     The appearance of waterproof RF connector can be said to be a great blessing for us,It is widely used,We use waterproof RF coaxial connectors in many areas.Like in an industrial environment,LED lighting, urban outdoor lighting project, lighthouse, cruise ship, aviation, industrial equipment, cable, sprinkler and so on.which are all use waterproof connectors.Military field due to the application of strict requirements,Many waterproof connector are used, such as submarine connector, submarine-launched missile connector and so on.

    The basic properties of RF connectors can be divided into three categories: mechanical, electrical, and environmental.Another important mechanical property is the mechanical life of the connector. Mechanical Life is actually a durability indicator, they are referred to as mechanical operation in NATIONAL standard GB5095.It takes one insert and one pull out as a cycle, and judges whether the RF coaxial connector can normally complete its connecting function (such as contact resistance value) after the specified insert and pull cycle.     1.Mechanical property As far as connection function is concerned, plug and pull force is an important mechanical property.Plug and pull force is divided into insertion force and pull out force (pull out force is also called separation force), the two requirements are different.In the relevant standards, the maximum insertion force and minimum separation force are stipulated, which indicates that, from the perspective of use, the insertion force should be small (hence the structure of low insertion force LIF and no insertion force ZIF), while the separation force if too small will affect the reliability of contact.The plug and pull force and mechanical life of the connector are related to the coating quality (sliding friction coefficient) of the contact part and the dimension precision (alignment) of the contact part.      2.Electrical Properties The main electrical properties of connectors include contact resistance, insulation resistance and electrical strength.      (1) High quality electrical connectors should have low and stable contact resistance.The contact resistances of connectors vary from a few to tens of milliohms.      (2) Insulation resistance measures the insulation performance between the contacts of electrical connectors and between the contacts and the housing. Its order of magnitude varies from hundreds to thousands of megohm.      (3) The electrical strength, or voltage and dielectric resistance, is the ability to withstand the rated test voltage between the connector contacts or between the contacts and the housing.      Other electrical properties.Electromagnetic interference leakage attenuation is used to evaluate the electromagnetic interference shielding effect of the connector, which is generally tested within the range of 100MHz~10GHz frequency.For RF coaxial connectors, there are electrical indicators such as characteristic impedance, insertion loss, reflection coefficient, voltage standing wave ratio (VSWR), etc.Due to the development of digital technology, in order to connect and transmit high-speed digital pulse signals, a new type of connector, namely high-speed signal connector, has appeared. Correspondingly, in terms of electrical performance, in addition to characteristic impedance, some new electrical indicators have appeared, such as Crosstalk, transmission delay, and delay.  ...