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What Is the MMCX Interface?


The MMCX interface is a coaxial RF connector that complies with the European Electronic Components Committee 22000 transmission specification.

The MMCX interface was developed in the 1990s and adopts a plug-in connection method that can rotate 360 degrees. Usually, its characteristic impedance is 50 ohms. The MMCX interface is commonly found on the antenna interface on the wireless PC card of personal computers, and on the GPS communication antenna socket of some PDAs and GPS navigation devices. On some in-ear headphones, the MMCX interface is also used to replace the data cable.

Coaxial cable is a kind of wire and signals transmission line. It is generally made of four layers of materials: the innermost is a conductive copper wire, and the outside of the wire is surrounded by a layer of plastic (used as an insulator and dielectric). There is a thin net-like conductor (usually copper or alloy), and then the outermost insulating material is used as the outer skin of the conductor. According to the size, there are different standard specifications for coaxial cables, ranging from 1/8 inch to 9 inches in diameter.

Coaxial RF Connector

Application of coaxial cable

Short-distance coaxial cables are generally also used in home audio-visual equipment or amateur radio equipment. In addition, it was once widely used in Ethernet connection until it was replaced by twisted pair.

Long-distance coaxial cables are often used as TV signal lines in radio or TV station networks. In the future, there will be a trend of being gradually replaced by other high-tech equipment, such as optical fiber, T1/E1, artificial satellite, etc. However, because coaxial cables are relatively cheap and have already been laid, they are still in use today.

Foam Insulated Coaxial Transmission Cable

Main communication applications:

The cellular mobile communication system

Microwave communication system

Shortwave defense system

Broadband network

Land mobile radio system

Leaky Cable

Main communication applications:

Tunnel and basement coverage (road tunnel, railway tunnel, subway)

Commercial mobile communication services and dedicated communication services. For example, FM broadcast in the tunnel, to improve the problem that the wireless broadcast signal cannot be received in the tunnel

Wireless communication coverage of large buildings, such as airports, parks, etc.

Rail transit signal system

Air Insulated Cable

main application:

Radio and TV stations

AM and FM

Wireless analog TV and wireless digital TV


The above information is provided by the coaxial connector factory.