Some introduction of the characteristics of commonly used RF connectors

Radio frequency signals have their own characteristics, so the transmission of radio frequency signals requires a special medium, and the corresponding connectors are also special. As a practitioner of radio frequency connectors, you need to understand some of the characteristics of this product, which will be helpful for purchasing products.

the choice of ordinary coaxial connector:

1. BNC is bayonet type, used for radio frequency connection with frequency less than 4GHz, widely used in instrument and computer interconnection.

2. TNC is a threaded connection, similar to BNC in size, working frequency up to 11GHz, thread for vibration environment.

3. SMA is the most widely used, the impedance is divided into 50 and 75 ohms, of which 50 ohm SMA, the frequency of flexible cable assembly is lower than 12.4Ghz, and the frequency of semi-rigid cable assembly is as high as 18GHz. Another 3.5mm plug, similar to SMA, but thicker than SMA, is compatible with SMA, and the cable assembly frequency can reach 26.5GHz.

4. SMB volume is smaller than SMA, in order to quickly connect the plug-in self-locking structure, usually used for digital communication, is L9 replacement, 50 ohm to 4GHz,75 ohm to 2GHz.

5. SMC is a threaded connection and other similar SMB, with a wider frequency range, usually used in military or high vibration environments. 5. The N-type connector is a threaded connection with air as an insulating material. It has a low cost and a frequency of up to 12GHz. It is often used in test equipment with an impedance of 50 and 75 ohms.

MCX and MMCX connectors are small and generally used for dense connections.

7. BMA is used for blind plug connection of low power microwave systems up to 18GHz.

Each connector has military standards and commercial standards, military standards are generally copper, PTFE insulation, inside and outside gold-plated, the most reliable performance, of course, the cost is higher; commercial standard design using cheap materials, such as brass castings, polypropylene insulation, silver coating, reliability is relatively poor.

The connector body materials are mostly 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; N-type, TNC-type and BNC silver plating, but because silver is more prone to oxidation, most users prefer nickel plating.

Insulation materials are polytetrafluoroethylene, polypropylene and toughened polystyrene, of which polytetrafluoroethylene has the best insulation performance and higher cost.

Shenzhen Edelle Electronics Co., Ltd. is a professional manufacturer of RF coaxial connectors and cable assemblies. It has been deeply engaged in the processing and manufacturing industry of RF coaxial connectors and RF cable assemblies for many years, and has a highly specialized management team and senior technicians who have worked for many years. Elder can accept the market high-end product development customization and production, regular products are also based on the principle of quality first production and processing, production equipment and monitoring means perfect. The company has developed more than 40 series in strict accordance with national and industry standards. Its main products include SSMP, SMP, MMCX, MCX, MKZ, SMB, SSMA, SMA, 2.4, 2.92, 3.5, SBMA, BMA, BNC, TNC, N, L29, J599 series of high and low frequency integrated systems, inter-series adapters, coaxial adapters, coaxial attenuators, adjustable coaxial attenuators, coaxial loads, etc. The factory provides the assembly of cable assemblies. The available radio frequency cable models include: RG-179, RG-178, RG-142, RG-214, RG-316 cable, RF1/2 ", 7/8" feeder, etc. At the same time, it is equipped with network analyzers that can meet the testing needs of various products and wire stripping machines and high-frequency welding machines that meet the processing needs of cable assemblies, so as to achieve a benign balance in product quality and quality, taking into account and committed to the best customer service, is your best partner. The company always keeps pace with the times and is in line with international standards. We are full of confidence to respond to your requirements at any time with high-quality products and services close to customers, and provide high-quality, convenient and satisfactory services.