How to choose BNC jack connector
A BNC jack connector is an electromechanical element that connects a conductor (wire) with an appropriate mating element to connect and disconnect a circuit. Also known as connectors, plugs and sockets in China. With the different application objects, frequency, power and application environment, there are various forms of connectors. For example, there are aviation plugs and sockets in aviation, while waterproof connectors and cable connectors can be used in life. In today's society, connectors are widely used in military systems such as aviation, aerospace and national defense.
The selection of connector series is based on the application environment of the required product:
Wireless base station
Transmission equipment and switching equipment
Backplane, set-top box and network card
The selection of connector series is based on product performance and mechanical requirements, such as impedance matching, VSWR, maximum frequency, transmission power matching, etc. A typical application environment can guide you to connect the parts of this product catalog.
1. Wireless base station
Wireless base stations need to transmit high-power RF signals, high-speed digital signals, and similar signals.
The input / output ports of the equipment casing generally use n-type and 7 / 16 type connectors. The embedded RF modules need blind series, such as BMA series, DIN series embedded modules (Marconi) and panel connectors. The input / output modules apply MCX, surface mount series, panel and cable connectors. Finally, semi-rigid cable assembly and flexible cable assembly are used to complete the signal connection of each part of the whole equipment.
2. Transmission equipment and switching equipment
In today's high-capacity transmission equipment market, such as voice transmission, data transmission and image transmission, Jipin provides a large number of high-performance RF connection products. Including connectors, cable components and various consumables, small RF coaxial connectors are used from the office end to users, from basic equipment to set-top box, from 50 Ω to 75 Ω; Such as BNC series, TNC series, to subminiature such as MCX, SMA, SMB, SMC and their miniaturized versions SSMA, SSMB, SSMC. Miniature such as MMCX provides very high installation density. In the interface between din and IEC standards, high-speed signal transmission requires high-performance BNC jack connector in GHz band.
Wiring equipment is used between transmission equipment and switching equipment. This requires DDF series connectors.
Digital distribution frames (DDF): with the development of communication technology, high-capacity SDH, ATM and other equipment are widely used, which requires the corresponding development of the RF coaxial connector of its basic components. It should have smaller volume, wider frequency band, better performance and more reliable connection. Jipin relies on its own RF / microwave connector transition compensation CAD system, Re optimized L9 (Siemens) series, C3 (at t) series, C5 (NEC) series, C6 (Fujitsu) series, ERI (Ericsson) series and other series connectors widely used in China. Make it more reliable and better adapt to the requirements of future high-speed communication.
The C4, SMZ and CC4 series wiring systems developed by Jipin with reference to international standards use connectors, innovative modular design, smaller volume, high applicable frequency and excellent electrical performance.
3. Backplane, network card and set-top box.
In recent years, with the rapid development of coaxial connector market, BNC jack connector accounts for a large number of applications in coaxial export Ethernet applications that provide high-speed path.
In the lower layer of communication link, BNC series connectors are widely used. BNC series is widely used because of its unique bayonet locking mode and convenient plug-in characteristics.
Recently, because SMB series connectors can improve the installation density of connectors, and because of their excellent performance, they can be used not only for general commercial applications, but also for military applications, so some users gradually choose them
In fact, there are many options for the same application, and users can choose their own appropriate connectors according to their needs.
Selection of connector:
The connection mechanism makes it possible for the two connectors to connect with each other. It depends on the required quality and impedance characteristics of the two interfaces, as well as the frequency of operation. The connection mechanism has a great influence on the performance of the connector. Here are five common connection mechanisms.
Threaded coupling mechanism uses a connecting nut to connect. Pay attention to limit the maximum torque to prevent the nut from slipping. The connectors with threaded connection mechanism include the following series, SMC, SMA, TNC, N, 7 / 16, SSMA, CC4 and L9, because the threaded connection is firm and reliable; It is mainly used for testing equipment, military and telecommunications equipment.
Snap on coupling mechanism push on coupling mechanism is mainly used for connectors with small interfaces, and its installation density is relatively high. Because this connection mechanism is relatively convenient and easy to use, it is often used for connection on printed circuit board (PCB).
Push in connection has a locking reed, which has the advantage of very fast and convenient insertion and dialing. This connection mechanism is mainly used in small connector series, such as MMCX, MCX, SMB, SSMB and SMZ series.
Slide on coupling mechanism slide on coupling mechanism is generally used for high-density installation, and its insertion and dialing is very easy. This type of connector is mainly used in board to board coaxial connection system. This connection mechanism is mainly used in small DIN multi terminal connectors, such as BMA, C4, C5, C6 and ERI. They are usually modular installation.
Bayonet coupling mechanism bayonet coupling mechanism has a pair of locking slots, which is unique to BNC (bayonet Navy connector).
Bayonet connection mechanism is usually used in applications requiring reliable connection and rapid plug-in, such as test and measurement equipment and military equipment.
Push pull self-locking this connection mechanism has a unique self-locking mode.
The plug-in connection is as fast and convenient as the sliding connection, but it is very reliable. When it is self-locking, it will not unlock even if the cable is dragged. The push-in self-locking is usually used on small connectors installed with high density, such as 1.0 / 2.3 and 1.6 / 5.6 series. It inserts and dials quickly and locks reliably.