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RF coaxial connector type knowledge

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Nowadays, in our lives, the shadow of RF coaxial connectors can be seen in all fields, so practitioners in the connector industry should know some types of RF coaxial connectors. Below, the Superlink(SLK) technical engineer will sort out the type of RF coaxial connector for you. The article is very detailed and detailed. It is a collection that can be included in your favorites. 

The coaxial connector is used to transmit RF signals and has a wide transmission frequency range of up to 18 GHz or higher. The basic structure of coaxial connectors for radar, communication, data transmission and aerospace equipment includes: center conductor (positive) Or negative center contact); the dielectric material outside the inner conductor, or insulator; the outermost is the outer contact, which acts like a shield outside the coaxial cable, ie transmits a signal as a shield or The grounding element of the circuit. RF coaxial connectors can be divided into many types. The following are some of the more common types.

N type connector
N connector
N-type connector (N-type connector), threaded connection, rotatably locked. It was one of the first connectors to be used to transmit microwave frequency signals and was invented by Paul Neill of Bell Labs in the 1940s and named after Neil's initial letter. The signal frequency range supported by the N-type connector For 0 to 11 GHz, the enhancement type can reach 18 GHz. 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
BNC connector
The BNC connector is also one of the frequently seen RF connectors. It is a small bayonet connector that can be quickly connected. The full name of the BNC is the Bayonet Nut Connector (the snap-fit ??connector, this name is vividly described). The shape of the joint), the original meaning of BNC (Bayonet Neill-Concelman) is actually from the inventor of two inventors, the initials of the names of Paul Neill and Carl Concelman, 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 devices. 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 Ohm and 75 ohms.


SMA connector
SMA connector
The SMA connector is a widely used small-threaded coaxial connector with frequency bandwidth, excellent performance, high reliability and long life. The SMA connector is suitable for connection in the RF loop of microwave equipment and digital communication systems. RF cable or microstrip line is commonly used in wireless devices for the GPS clock interface on the board and the test port of the base station RF module. The full name of the SMA is SubMiniature A version, which was invented in the 1960s. The signal frequency supported by the SMA connector. Ranges range from DC to 18 GHz, and some types can support up to 26.5 GHz. The characteristic impedance is 50 ohms.


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


SMC connector
SMC connector
The full name of SMC is the SubMiniature C version, which was also the RF coaxial connector invented in the 1960s. It uses the #10-32 UNF threaded interface to provide excellent electrical performance from DC to 10 GHz. The SMC male has external threads and the SMC female has matching nuts. There are two types of impedance: 50 ohms and 75 ohms. Interconnected for small coaxial cables and for printed circuit boards of very large size.


F type connector
F connector
F-type connector is a radio frequency connector that everyone can see in daily life. It is widely used in the fields of cable TV, satellite TV, cable modem and TV. It can be used in applications with impedance matching requirements or in non-matching areas. It is characterized by a threaded connection and easy insertion. Stable performance. The F-type connector was invented by Eric Winston in the early 1950s and became the connector of the VHF TV antenna that is commonly seen in the United States in the 1970s. The price of the connector is very low, the characteristic impedance is 75 ohms, and the highest frequency can generally support up to 1 GHz or 2.4 GHz.


RCA connector
RCA connector
RCA is the abbreviation of the United States, because the RCA connector was invented by the company in the 1940s. RCA is commonly known as the Lotus socket, also known as the AV terminal, AV interface, almost all TV sets, DVD players have this interface. It is not designed for which interface, it can be used in both audio and ordinary video signals. Typical bearer signals range from 0-100 MHz.


7/16 DIN connector
DIN connector
The DIN (also known as 7/16 or L29) series of coaxial connectors are a large 50 ohm impedance threaded connector with robust stability, low loss, high operating voltage, and most of them are waterproof and can be used Outdoor as a medium and high energy transmission connector, widely used in microwave transmission and mobile communication systems, commonly used in base station antenna feeder connector, antenna connector, etc. DIN is the abbreviation of the German Institute of Standardization, is a series of connectors The standard .DIN and N-type joints are very similar. The DIN head is large in diameter and is about twice the diameter of the ? head.


TNC connector
TNC connector
TNC is the abbreviation of Threaded Neill-Concelman. Is it true that Neill-Concelman is familiar? Right, the NC of the TNC is the same as the NC of the BNC, that is to say, it has the same inventor. The TNC connector is a BNC connector. A variant that uses a threaded connection. The characteristic impedance is 50 ohms and the optimum operating frequency range is 0-11 GHz. In the microwave band, TNC connectors perform better than BNC connectors. It has strong vibration resistance, high reliability, excellent mechanical and electrical performance, and is widely used in radio equipment and electronic instruments to connect RF coaxial cable.


UHF connector
UHF connector
This type of joint has a long history and has been used since the second world war. Its other name "UHF connector" comes from the definition of UHF at that time (the frequency above 30MHz is the UHF frequency range). Tests on this type of connector now show that its characteristics are mainly suitable for frequencies around 100 MHz. This is the VHF band that is usually referred to now.

The most notable feature of this connector is a thicker center conductor (about 4 mm thick) in the middle of the plug. The connection and fixing are performed by the internal thread on the joint and the external thread on the socket. This type of plug is not waterproof, so special care should be taken during outdoor installation to affect natural conditions such as rain.


MCX connector
MCX connector
Invented in the 1980s, the MCX connector has the same internal contacts and insulator dimensions in the SMB connector, but is 30% smaller than the SMB. The full name of the MCX is Mirco Coaxial. The relevant standards are specified in European CECC 22220. Because the MCX connector adopts the push-in connection method, the connection and separation of the connector are very fast, and the installation time of the connector is shortened. The MCX connector has good electrical performance at a frequency of 6 GHz, and can also be used. The adapter includes a variety of cables such as semi-rigid cables and flexible cables for reliable connection and long life.
 
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