 Housing      Header      Contacts-Terminals and pins      Metal for RF connectors      plug and socket      cladding material      The key and positioning      Circuit identification      Wire gauge (wire number)      Housing，Commonly known as the plastic shell，      The connector seat body has the following functions     Support contact parts：     To insert a needle, reed, etc.Position it firmly and correctly,     Prevent dust, dirt and moisture, protect contact parts and conductors,Insulate circuits from each other,     In-line connectors: A straight coaxial connector is characterized by a wire being connected from half of the connector assembly,Take out the other half,These two parts of a connector are called a plug (male) and a socket (female).     Header,Commonly known as the needle base,A connector mounted on a printed circuit board,The body used is called the header, also known as the base or wafer,The main difference between the base and the base is that the base is always mounted together with the circuit pin,The seat is just an empty shell,The base comes in two forms: covered and uncovered,The guard is the connector pin and socket,A protective cover made of a seat or skirt around the mating part,header also have friction lock style,It is a partially covered base,But it has a locking device,It makes the combination of base and base body more reliable.

    In today’s society, the development of science and technology is faster and faster, people also gradually to electronic, technology development, and electronic connector is such a new thing. At both ends of a loop, there are two conductors, and there may be no connection between the two conductors. The role of electronic connector is to make the two conductors well connected, so that different currents or communication signals can effectively flow between the two conductors.     It is widely used in all kinds of electrical engineering. And it is simple and convenient that we can make a temporary connection through electronic rf connector adaptor, which can be inserted and pulled at will to solve the problem for a while. It can also be a permanent connection in the middle of many electrical devices, or a permanent node can be established between different wires.     The material sort of electronic connector is very much, the connector of different sort, having different effect, the degree of difficulty of machining, also can affect the effect that USES greatly. The materials we use to make electronic coaxial connectors generally include materials that can be insulated such as plastic, and some materials that can conduct electricity, such as phosphorous copper or brass. When we choose electronic connectors with different functions, we should pay attention to the choice of appropriate products according to the specific situation.

    With the use of more and more electronic products, mobile phones, computers, cameras and so on, the demand for RF coaxial connectors is also increasingly high. At present, the top five application fields in global connector sales are automobile, computer and its peripherals, communication, industrial equipment, aerospace and military, while the top five applications in growth are consumer electronics, transportation electronics, medical electronics, communication electronics, computer and so on.     RF connector adaptor, as an indispensable part of electronic products, plays an increasingly important role in the diversified functions and modular design of electronic products.     The CAGR (annual compound growth rate) of China’s coaxial connector adaptor market in the past five years was 27.2%, and the CAGR in the past 10 years was as high as 42.7%, far higher than the world’s growth level in the same period, and the country is the fourth largest connector market leading the global rapid growth. China’s connectors are mainly low-end, high-end connectors accounted for a relatively low, but the demand growth is fast.     Facing the market and technological changes of connectors, enterprises should keep track of cutting-edge connector technologies, learn new connector technologies, gradually get rid of the competition of low-end products and develop high-end product lines.

For FPC antennas, Many of us have no concrete idea,So what is a antenna? The antenna is the computer we use in cars, cell phones and all kinds of home appliances are indispensable components, It is an important bridge connecting all parts, It is widely used,at present, China is the world’s largest antenna manufacturing base, FPC antenna is a kind of antenna,Mostly for mobile applications.     What is FPC? It is a PCB antenna made of soft materials, The phone can be used for simple circuit links, This is what we know as a row line, It can also be used as a complex circuit, With the gradual increase of mobile application functions, The use of FPC antennas will also increase, The types of FPC antennas are also varied, LED display with PCB connection requires FPC antenna, The 0.3mm products have been put into use in large quantities, But as technology continues to evolve, Is gradually moving in the direction of 0.4.     In the future, the number of FPC pins will be reduced, The implementation is placed in the LED frame along with other components of the phone, The development of board–to–board connectors is also evolving,The height of the pins and the spacing of the pins will become smaller, Although now it is still mainly 0.4mm, But it is moving in the direction of 0.35, It’s going to get smaller and smaller, I/O connector as a mobile phone in and out of an important channel, Volume reduction is an inevitable trend, In the meantime, visual effect and waterproof function also are the trend that will develop in the future, As a kind of FPC antenna, battery antenna will be more miniaturized,Low contact impedance and improved connection reliability.

    RF connector insulator material usually have: PBT、NYLON、ABS、PC、LCP such material.But in principle, the material with better flame resistance is adopted.     a. PBT material:     PBT material is usually added 20-30%fiberglass, with anti – crack anti – shock, anti – electricity ability. Friction coefficient is low. Good self-lubrication effect. Good oil and chemical resistance. Both heat and humidity have excellent dielectric strength. Its shrinkage is between 0.6% and 3.0%. Its heat resistance is about 230 ℃. Good molding and fire resistance. It is a common adhesive for coaxial connector products.     b. NYLON66、NYLON6T、PC、LCP.     Its shrinkage is 1.0%-0.3%.The temperature resistance is better than PBT. Usually, NYLON66 resistant 260℃–280℃.NYLON6T resistant 280℃–300℃. LCP resistant 290℃–320℃. But its water absorption is larger. Generally used for high temperature resistance and PITCH Fewer products(like SMD、HOUSING、PLCC).     c. ABS：     Good impact toughness, oil resistance, abrasion resistance, easy to shape, good hardness, good rigidity. Heat resistance around 100℃. Generally used for auxiliary products in RF connectors.

    In many applications, screw-on RF connections can sometimes appear stretched and even unusable: for example, panels, daughter cards, or inserts with multiple RF connection points.     In these cases, the spacing between the connectors must be set to be very small, so that the nut cannot be accommodated; or the card/combination sometimes cannot be operated due to the need to be inserted into the slot.     For these reasons, people have developed push-in connectors, also called blind-mate connectors. The common blind-mate connector in military, aerospace, satellite communications and radar fields is the Blind-mate A/BMA (Blind-mate A/BMA) connector developed in the 1980s.     BMA connector     In the initial period, the registered trademark used by the BMA connector was OSP, so it is often called OSP connector.     The advantage of the BMA connector is that even if there is a slight degree of misalignment, the mating can be easily achieved by pressing the plug into the socket with sufficient pressure, and then the internal mechanical mechanism ensures a firm electrical connection and correct alignment. Thanks to this high-precision alignment method, the operating frequency of the standard BMA connector is as high as 22/26.5 GHz, the voltage standing wave ratio is as low as 1.2:1, and the typical insertion loss is about 0.1dB.     In view of the practicality of BMA connectors, people have subsequently developed a variety of alienation styles suitable for different installation types, including BMA coaxial plug/jack connectors, BMA through-wall connectors, BMA panel mount connectors, BMA PCB connectors and screw-in sealed connectors. Generally, the housing and mounting parts of BMA connectors are made of stainless steel or passivated stainless steel, and sometimes gold-plated stainless steel is used. In addition, BMA connectors generally use gold-plated beryllium copper internal contacts and PTFE dielectric materials.     Because some BMA connectors have mechanical grooves or mechanical ridges, which help maintain the mating "snap" structure, if there is a sliding-in blind mating connector in the application environment, it will be disconnected due to external force. In the situation, the problem can be solved by using BMA connectors. Since the electrical connection in the BMA connector is achieved through 360-degree contact, it also has a certain degree of vibration resistance and impact resistance.     The construction quality and materials used in BMA coaxial connectors allow this type of connector to generally withstand thousands of mating cycles, which is superior to other mechanical retention mechanisms. For measurement test applications and automatic test applications, the BMA connector can be used as a high-reliability connection interface, which not only improves the connection and disconnection speed at the hardware level, but also achieves stronge...

    What is the advantage and disadvantages if nickle plating of rf connector? And how about the gold plating of rf coaxial connector? When post the pcb mount. Why the nickle plated is more convenient to solder the tin? There are many false solder in the nickle plating,But few in the gold plating, That’s why?     Answer 1: We know only the weld ability and conductivity of gold, its stability is the best among metals,It is widely used in PCB board. Nickel, good stability, but poor weld ability,But the temperature is better, It is rare to hear of nickel plating on the gold fingers of PCB boards.     Answer 2: Connector adaptor plating a single coating is very few, generally after nickel plating and then a layer of gold. Gold electroplates better conductivity and weld ability than nickel, but costs more. The cost of nickel is low, used in the ground coating on the substrate play a filling role, and subsequent coating capacity.     Answer 3: The electroplating physical properties are relatively stable, electrical conductivity is better, but the material is more expensive, general electroplating in the contact layer of the terminal.     Answer 4: The nickel itself electroplating is not good, generally will not be directly plated nickel for welding, is now the so-called solderable nickel, but it is a layer of flux after nickel plating.

    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.