RF coaxial connectors have a very important role to play in all major fields.

RF coaxial connectors are found in a variety of fields today, so those in the connector industry should be aware of certain types of RF coaxial connectors. Coaxial connectors are used to transmit RF signals in the frequency range up to 18 GHz or higher. The basic structure of coaxial connectors for radar, communications, data transmission and aerospace equipment includes: a center conductor (positive) or negative center contact); an inner conductor or insulator outside the dielectric material; and the outermost layer is the outer contact, which acts similarly to the shielding on the outside of the coaxial cable, i.e., transmits the signal as a shield or as a grounded element of the circuit.RF coaxial connectors can be classified into various types. The following are some of the more common types.

N-type connector (N-type connector), threaded connection that locks rotatably. It was one of the first connectors used to transmit microwave frequency signals, invented by Paul Neill of Bell Labs in the 1940s and named after Neill's initials.N-type connectors support a signal frequency range for 0 to 11 GHz, with enhancements up to 18 GHz.Characteristic impedances are of two types: 50 ohms (widely used in mobile communications, wireless data There are two types of characteristic impedance: 50 Ohm (widely used in mobile communications, wireless data, paging systems, etc.) and 75 Ohm (mainly used in cable television systems). It is a small bayonet connector that can be connected quickly.The full name of BNC is "Bayonet Nut Connector" (bayonet connector, this name is vividly described). The shape of the joint, the original meaning of BNC (Bayonet Neill-Concelman) actually comes from the names of two inventors, Paul Neill and Carl Concelman, the initials of Paul Neill, also the inventor of the N-type connector.BNC connectors are widely used in wireless communication systems, televisions, test equipment and other RF electronic devices. Radio Frequency (RF) electronics. Early computer networks also used BNC connectors.BNC connectors support a range of characteristic frequencies from 0 to 4 GHz. There are two types of impedance: 50 ohms and 75 ohms.SMA connectors are a widely used small threaded coaxial connector with frequency bandwidth, excellent performance, high reliability, and long life.SMA connectors are suitable for connections in RF loops in microwave equipment and digital communication systems. RF cables or microstrip cables are commonly used in wireless equipment as on-board GPS clock interfaces and test ports for base station RF modules.The full name of SMA is SubMiniature Version A, which was invented in the 1960's.The signal frequencies supported by SMA connectors. The range is from DC to 18 GHz, with some types supporting up to 26.5 GHz.The characteristic impedance is 50 ohms.The full name of the SMB is SubMiniature version B. It is a small push-to-lock RF coaxial connector that offers small size, light weight, ease of use and excellent electrical performance. Suitable for radio equipment and electronic instruments with high frequency. Connects coaxial cable to the loop. Commonly used on wireless equipment for base station side E1 transmission cable connection, base station DDF small transmission box use.SMB connectors were invented in the 1960s and are smaller in size than SMA connectors. There are two types of characteristic impedance: 50 Ohm and 75 Ohm with excellent electrical characteristics over the frequency range of DC to 4 GHz.SSMB is a miniature version of the SMB connector that supports up to 12.4 GHz.The full name of the SMC is SubMiniature C version, which is also an RF coaxial connector invented in the 1960's. It uses #10-32 UNF to connect to a base station side E1 transmission cable, which is used in base station DDF mini transmission boxes. It uses a #10-32 UNF threaded interface to provide excellent electrical performance from DC to 10 GHz.The SMC male connector has male threads and the SMC male connector has a mating nut. Impedance is available in two types: 50 ohms and 75 ohms. Interconnects are used for small coaxial cables and very large size printed circuit boards.F-type connector is an RF connector that everyone sees in their daily life. It is widely used in cable TV, satellite TV, cable modem and TV field. It can be used in applications with impedance matching requirements or mismatched areas. It features a threaded connection and is easy to plug in. The F-type connector was invented by Eric Winston in the early 1950s and later became the connector for VHF TV antennas, which were common in the United States in the 1970s. The connector is very inexpensive, has a characteristic impedance of 75 ohms, and the frequency can often support up to 1 GHz or 2.4 GHz.RCA is an American acronym, as the RCA connector was invented by the company in the 1940s.The RCA is often referred to as a Lotus socket, and is also known as an AV terminal, an AV interface, which is found on almost all televisions, and DVD players. It is not designed for either interface, it can be used for audio and general video signals. Typical carrier signal range is 0-100 MHz.DIN (also known as 7/16 or L29) series coaxial connector is a 50 ohm impedance large threaded connector with stable stability, low loss, high operating voltage and most of them are waterproof, can be used outdoors as medium strength and high energy transmission connector, widely used in microwave transmission and mobile communication system, usually used for Base station antenna feeder connectors, antenna connectors, etc. DIN is the abbreviation of the German Association for Standardization, a series of connectors. N connectors are very similar.DIN headers have a larger diameter, about twice the diameter of the header.TNC stands for Threaded Neill-Concelman.Is Neill-Concelman familiar? Correct, the NC of TNC is the same as the NC of BNC, i.e. it has the same inventor.TNC connectors are BNC connectors. A variant that uses a threaded connection. The characteristic impedance is 50 ohms and the operating frequency range is 0-11 GHz.In the microwave band, the TNC connector outperforms the BNC connector. It has strong vibration resistance, high reliability, excellent mechanical and electrical properties, and is widely used in radio equipment and electronic instruments to connect RF coaxial cables.

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