Industry news

　　As an important electrical connection component, SMA RF connector plays an important role in various electronic equipment, instruments and electronic information systems. After decades of development, RF coaxial connector has formed an independent and complete professional system and become an important part of the connector family. The rapid development of the domestic information industry is a powerful impetus to the continuous growth of the RF connector market.

　　In addition to the pursuit of miniaturization and high frequency, RF coaxial connector manufacturers are constantly improving the multi-function and reliability of their products. Now the RF connector not only plays the role of signal connection, but also has the function of signal processing, such as filtering, phase modulation, mixing, attenuation, detection, amplitude limiting and so on. In addition, low standing wave, low loss, large capacity, high power and ease of installation have become the goal of manufacturers. "With the change of production process, stamping technology has emerged. It used to be turning, but now it can be formed by stamping once. In this way, the volume can be made smaller, and the height of the whole connector is less than 2 or 3 mm. Now some coaxial connectors are as small as sesame.

　　Basic parameters of SMA connector:

　　Insulation resistance refers to the resistance value of the insulation part of the connector when voltage is applied to the insulation part of the connector, so as to produce leakage current in or on the surface of the insulation part. It is mainly affected by insulation material, temperature, humidity, fouling and other factors. The insulation resistance values provided on the connector samples are generally the index values under the standard atmospheric conditions. Under some environmental conditions, the insulation resistance values will decrease to some extent.

　　security parameter

　　Insulation resistance refers to the resistance value of the insulation part of the connector when voltage is applied to the insulation part of the connector, so as to produce leakage current in or on the surface of the insulation part. It is mainly affected by insulation material, temperature, humidity, fouling and other factors. The insulation resistance values provided on the connector samples are generally the index values under the standard atmospheric conditions. Under some environmental conditions, the insulation resistance values will decrease to some extent. In addition, pay attention to the test voltage value of insulation resistance. According to the insulation resistance (m Ω) = the voltage (V) / leakage current (μ a) applied on the insulator, different voltages are applied, and the result is unnecessary. In the connector test, the applied voltage is generally 10V, 100V and 500V.

　　Withstand voltage

　　Withstand voltage refers to the critical voltage that can withstand higher than the rated voltage without breakdown phenomenon between the mutually insulated parts of the contact pair or between the insulated part and the grounding within the specified time. It is mainly affected by contact distance, creepage distance, geometry, insulator material, ambient temperature, humidity and atmospheric pressure.

　　Flammability

　　Any connector can not work without current, so there is a risk of fire. Therefore, the connector should not only be able to prevent ignition, but also be able to self extinguish in a short time in case of ignition and fire. The electrical connector with flame retardant and self extinguishing insulating material should be selected.

　　Termination method of SMA RF connector

　　1. Wiring type

　　Wiring is divided into wire welding and crimping connectors. Wire bonding is to weld the central conductor and cable shield. Crimping type is to crimp the central conductor and cable shielding layer, which has high efficiency and good performance. The welding wire type is stable and reliable. Generally, the flexible cable is mostly of crimping type, and the semi flexible cable and semi steel cable are mostly of welding type.

　　2. Connect to PCB (printed circuit board)

　　When the connector is connected with PCB, it is usually through hole or SMT. In order to tin easily, and PCB connection metal is mostly gold or tin plating.

　　3. Panel type

　　Panel connectors are mostly installed on the casing, connecting internal and external equipment. The flange type connector is fixed by drilling holes on the main body panel of the connector. Another is to make screw teeth on the connector body and fix them with screw teeth. This type of connector often also requires waterproof function.

　　The development trend of SMA RF connector will have the following characteristics:

　　1. Miniaturization of SMA RF connector: with the miniaturization of the whole system, the volume of RF connector is getting smaller and smaller, such as SSMB, MMCX series, the volume is very small.

　　2. High frequency of SMA RF connector: HP in the United States has launched RF connector with frequency up to 110ghz several years ago. The frequency of domestic general products is not more than 40GHz. The frequency of flexible cable is not more than 10 GHz, and that of semi-rigid cable is not more than 20 GHz.

　　3. Multi function of SMA RF connector: in addition to bridge function, it also has signal processing functions, such as filtering, phase modulation, mixing, attenuation, detection, amplitude limiting, etc.

　　4. Low standing wave, low loss: meet the needs of weapon system and precision measurement.

　　5. Large capacity and power of SMA RF connector: large capacity and power mainly meet the development needs of information highway.

　　6. Surface mount: mainly adapt to the development needs of SMT technology (surface mount technology), and help to simplify the wiring structure design of multilayer printed circuit board.

　　Yangzhou Hongbo Electronic Industry Co., Ltd. is located in Yangzhou, a famous economic development city in the Yangtze River Delta. It focuses on the production, sales, research and development of GATV, posts and telecommunications, radio communication and RF connectors. It is one of the more mature connector manufacturers in China. Products through the national supervision and inspection center inspection, quality first, is the cable manufacturers at home and abroad, connector fixed-point suppliers.