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How to choose the RF connector

Stars: 3StarsVisit: -Release time: 2012-12-03 10:52:00
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The mechanical structure, material, surface treatment on the connector performance and price has great influence. Mechanical structure determines the production efficiency and the use of materials, or materials. Connector commonly used are made of brass, bronze, copper, stainless steel, PTFE. Brass and bronze, the price is relatively low, low hardness, easy processing, high production efficiency. Beryllium copper, stainless steel, high price, high hardness, good elasticity, but the process can. RF connector for lower resistivity, excellent corrosion resistance oxidation resistance with precious metal plating, such as gold, silver, nickel, etc.. Especially small size effect on the performance of the center conductor requirements more stringent. As a result of these metal prices, the impact on prices is great, general manufacturers specifications in the book detailed description of plating thickness.
The user can according to the above factors combined with their own conditions of use, environment and reasonable cost performance good connector.
How to choose the RF connector
RF connector for variety, for machine design engineers choose suitable RF connector to ensure that the whole or the whole system reliability is critical, or use a more convenient and practical, more economical. In working practice according to their own needs to choose a suitable RF connector, can consider the following the convenience factor:
1 : Electrical properties
1.1 Characteristic impedance
Radio frequency characteristic impedance of the connector is the most frequently used 50 Ω and 75 Ω two. Many series connector at the same time 50Ω and 75 Ω two specifications.  Normal 50 Ω connector for high frequency, high performance products; 75 Ω connector with lower frequency, frequency below 4GHz, particularly consumer electronics and video of more. Users according to their own product selection and matching the impedance of the connector. If the user is using the 75 Ω RG 59 Cable should choose 75 Ω connector.
1.2 Frequency
Each RF connector has a frequency range of use, users have to understand your product frequency to select connector. Choose below the requirement of working frequency connector can affect overall electrical performance; or expensive high precision high frequency connector waste. Attention should be paid to the different design of connector used frequency of relatively large differences, inferior products using frequency far did not reach the requirements of the industry standard. When selecting a connector user to confirm the electrical products performance specification.
1.3 VSWR
Voltage Standing Wave Ratio is radio frequency connector is one of the most important performance indexes, is the measurement of signals from the connector to return a measure of the standard, it is a vector unit including amplitude and phase components. The same type of connector used in different frequency VSWR is not the same as. Generally speaking, the higher using frequency, VSWR is higher also. If the user wants to know the connector of a given frequency under VWSR can ask manufacturer
2: Connector interface
2.1 Bayonet Interface
Bayonet type connector as long as the characteristics, so long as can be rotated 90 degrees locking, connection speed, stable. Suitable for frequent handling equipment, is widely used in network systems, instrumentation and other fields. The BNC series is a typical bayonet connector.
2.2 Push type
Push type interface is characterized by rapid connection and separation, small volume, light weight. For the shell plate to plate connection, high density mounting. Common type connector has SMB, MCX, MMCX etc..
2.3 Thread interface
Thread interface is characterized by connecting the most reliable, high mechanical strength, good vibration resistance. Due to the mechanical properties of electrical performance for better testing instrument, military aviation. Common thread connector has SMA, N, 7/16, 2.92 etc..
3: Termination
The same series of connector also has different termination
3.1 terminal type
Connection and welding wire and crimping connector. Welding wire is welded center conductor and cable shielding layer. Crimping is crimping the center conductors and the cable shielding layer, pressing type high efficiency and good performance. Wire bonding is stable and reliable. A generally flexible cable by crimping type, cable semi steel cable welding type.
3.2 PCB
When the connector is to be connected to the PCB mostly when inserting plate or patch. In order to accommodate to the tin, and PCB connected to gold or tin metal.
3.3 Panel type
Panel connector is mounted on the casing, connecting internal and external equipment. Flange type is on the main body of the connector panel mounting hole. There is a car in the connector body for screw, screw fixation. The connector is often also called the waterproof function.
4: Mechanical structure, material, surface treatment
The mechanical structure, material, surface treatment on the connector performance and price has great influence. Mechanical structure determines the production efficiency and the use of materials, or materials. Connector commonly used are made of brass, bronze, copper, stainless steel, PTFE. Brass and bronze, the price is relatively low, low hardness, easy processing, high production efficiency. Beryllium copper, stainless steel, high price, high hardness, good elasticity, but the process can. RF connector for lower resistivity, excellent corrosion resistance oxidation resistance with precious metal plating, such as gold, silver, nickel, etc.. Especially small size effect on the performance of the center conductor requirements more stringent. As a result of these metal prices, the impact on prices is great, general manufacturers specifications in the book detailed description of plating thickness.
The user can according to the above factors combined with their own conditions of use, environment and reasonable cost performance good connector.

Keywords in the article: manufacturer of SFP+ and QSFP+   manufacturer Mini-SAS    manufacturer RF connector and RF cable assemblies