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See the picture to understand the RF connector

  • Categories:News Center
  • Time of issue:2021-01-28 11:24
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(Summary description)Coaxial connectors are used to transmit radio frequency signals, and their transmission frequency range is very wide, up to 18GHz or higher. They are mainly used for radar, communications, data transmission and aerospace equipment. The basic structure of a coaxial connector includes: the center conductor (male or female center contact); the dielectric material outside the inner conductor, or insulator; the outermost part is the outer contact, which acts as the outer shield of the coaxial cable The same function, that is to transmit signals, as a shielding or circuit grounding element. RF coaxial connectors can be divided into many types, the following are the more common types.

See the picture to understand the RF connector

(Summary description)Coaxial connectors are used to transmit radio frequency signals, and their transmission frequency range is very wide, up to 18GHz or higher. They are mainly used for radar, communications, data transmission and aerospace equipment. The basic structure of a coaxial connector includes: the center conductor (male or female center contact); the dielectric material outside the inner conductor, or insulator; the outermost part is the outer contact, which acts as the outer shield of the coaxial cable The same function, that is to transmit signals, as a shielding or circuit grounding element. RF coaxial connectors can be divided into many types, the following are the more common types.

  • Categories:News Center
  • Author:technology light up the future published in information
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  • Time of issue:2021-01-28 11:24
  • Views:
Information

Coaxial connectors are used to transmit radio frequency signals, and their transmission frequency range is very wide, up to 18GHz or higher. They are mainly used for radar, communications, data transmission and aerospace equipment. The basic structure of a coaxial connector includes: the center conductor (male or female center contact); the dielectric material outside the inner conductor, or insulator; the outermost part is the outer contact, which acts as the outer shield of the coaxial cable The same function, that is to transmit signals, as a shielding or circuit grounding element. RF coaxial connectors can be divided into many types, the following are the more common types.

N type connector


Type N connector is a threaded connection and can be rotated and locked. It was one of the first connectors that could be used to transmit microwave frequency signals. It was invented by Paul Neill of Bell Labs in the 1940s and named after Neill's initials. The signal frequency range supported by the N-type connector is 0 to 11GHz, and the enhanced type can reach 18GHz. There are two types of characteristic impedance, 50 ohms (widely used in mobile communications, wireless data, paging systems, etc.) and 75 ohms (mainly used in cable television systems).

BNC connector

 
The BNC connector is also one of the frequently seen RF connectors. It is a small bayonet connector that can realize fast connection. The full name of BNC is Bayonet Nut Connector (snap-fit ​​connector, which vividly describes This connector shape), the original meaning of BNC (Bayonet Neill-Concelman) actually came from two inventors, Paul Neill and Carl Concelman's initials, Paul Neill is also the inventor of the N-type connector. BNC connectors are widely used in wireless communication systems, televisions, test equipment, and other radio frequency electronic equipment. Early computer networks also used BNC connectors. The signal frequency range supported by the BNC connector is 0 to 4 GHz. There are two types of characteristic impedance: 50 ohms and 75 ohms.

SMA connector

 
SMA connector is a widely used coaxial connector with small threaded connection. It has the characteristics of wide frequency band, excellent performance, high reliability and long life. SMA connectors are suitable for connecting radio frequency cables or microstrip lines in the radio frequency loops of microwave equipment and digital communication systems. They are often used for GPS clock interfaces on single boards and test ports of base station radio frequency modules on wireless equipment. The full name of SMA is SubMiniature version A, which was invented in the 1960s. The signal frequency range supported by SMA connectors is from DC to 18GHz, and some types can support up to 26.5GHz. The characteristic impedance is 50 ohms.

SMB connector


The full name of SMB is SubMiniature version B. It is a small push-lock type radio frequency coaxial connector. It has the characteristics of small size, light weight, convenient use, and excellent electrical performance. It is suitable for high-frequency circuits of radio equipment and electronic instruments. For connecting coaxial cables. It is often used in wireless equipment to connect the base station side E1 transmission cable to the base station DDF small transmission box. The SMB connector was invented in the 1960s and has a smaller size than the SMA connector. There are two types of characteristic impedance: 50 ohms and 75 ohms. It has excellent electrical characteristics in the frequency range of DC to 4GHz. SSMB is a mini version of SMB connector that can support up to 12.4GHz.

SMC connector


The full name of SMC is SubMiniature version C, which is also a radio frequency coaxial connector invented in the 1960s. It uses #10-32 UNF threaded interface, which can provide excellent electrical performance in the range of DC to 10GHz. The SMC male head has external threads, and the SMC female head has matching nuts. There are two types of characteristic impedance: 50 ohms and 75 ohms, which provide interconnection methods for small coaxial cables and printed circuit boards that care about size.

F connector


The F-type connector is a radio frequency connector that everyone will see in daily life. It is widely used in the connection of cable TV, satellite TV, cable modem and TV. It can be used in occasions where impedance matching is required, and it can also be used in non-matching places. It is characterized by screw connection and convenient insertion. Stable performance. The F-type connector was invented by Eric Winston in the early 1950s. In the 1970s, it has become a common connector for VHF TV antennas in the United States. The price of the F-type connector is very low, the characteristic impedance is 75 ohms, and the highest frequency can generally be supported to 1GHz or 2.4GHz.

RCA connector


RCA is the abbreviation of Radio Corporation of American, because the RCA connector was invented by this company in the 1940s. RCA is commonly known as lotus socket, also known as AV terminal, AV interface, almost all TV sets and DVD players have this interface. It is not specifically designed for which kind of interface, it can be used for both audio and ordinary video signals. The typical bearer signal range is 0-100MHz.

7/16 DIN connector


DIN type (also called 7/16 or L29) series coaxial connector is a larger 50 ohm impedance threaded connector, which has the characteristics of sturdiness, stability, low loss, high working voltage, etc., and most of them have waterproof structure, which can be used outdoors as Connectors for medium and high energy transmission are widely used in microwave transmission and mobile communication systems. Commonly used in base station antenna feeder connectors, antenna connectors, etc. DIN is the abbreviation of the German Institute for Standardization and a series of connector standards developed by it. The DIN connector is very similar to the N-type connector. The DIN head has a large diameter, which is about twice the diameter of the N head.

TNC connector


TNC is the abbreviation of Threaded Neill-Concelman, do you see Neill-Concelman a bit familiar? By the way, TNC's NC is the same as BNC's NC, which means that it has the same inventor. The TNC connector is a variant of the BNC connector, which uses a threaded connection. The characteristic impedance is 50 ohms, and the best operating frequency range is 0-11GHz. In the microwave frequency band, TNC connectors perform better than BNC connectors. It has the characteristics of strong vibration resistance, high reliability, excellent mechanical and electrical performance, etc., and is widely used to connect radio frequency coaxial cables in radio equipment and electronic instruments.

UHF connector

 
This type of connector has a long history, and it has been used in the period before World War II. Another name "UHF connector" comes from the definition of UHF at that time (frequency higher than 30MHz is the UHF frequency range). And now the test of this connector shows that its characteristics are mainly suitable for use at frequencies around 100MHz and below. This is the VHF frequency band that is now usually referred to.

The most significant feature of this connector is a thicker center conductor (about 4mm thick) in the middle of the plug. The connection and fixing adopts the way that the internal thread on the joint and the external thread on the socket engage with each other. This kind of plug is not waterproof, so you should be especially careful about the impact on natural conditions such as rain when installing it outdoors.

MCX connector


The MCX connector was invented in the 1980s. It has the same internal contact and insulator dimensions as the SMB connector, but it is 30% smaller than the SMB. The full name of MCX is Mirco Coaxial. The relevant standards are stipulated in European CECC 22220. Because the MCX connector uses a push-in connection, it makes the connection and separation of the connector very fast, and shortens the installation time of the connector. The MCX connector still has good electrical performance when the frequency reaches 6GHz, and can also be adapted to various cables including semi-rigid cables and flexible cables, with reliable connection and long life.

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