034-1033

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034-1033 Coaxial Connector (RF)

RF coaxial connectors are devices widely used for transmitting radio frequency signals between two pieces of equipment. They are commonly found in both laboratory and industrial settings, and are also sometimes referred to as either RF connectors or coax connectors. They are designed to provide a reliable connection for high frequency signals, which require low-loss transmission that minimizes interference and signal degradation.

Application Field

RF coaxial connectors are often used to link antennas with other radio equipment, to interconnect amplifier stages in broadcast transmitters for television and radio broadcasting, for antenna broadcasting, and for connecting to radar dishes. They are also often employed in mobile phone and Wi-Fi technologies, as well as in the connecting technologies that support both wireless and satellite systems. As coax connectors are able to conduct high frequencies with minimal interference, they are an integral part of many systems.

Working Principles

Coaxial connectors use two concentric conductive elements in the form of either a tubular conductor (inner) or a thin-walled tube (in the form of an electrical cable), with an insulating layer in between. A coaxial connector typically comprises a center pin, a metallic sleeve, and a shell to house them both. It is the geometry of the way the three elements are put together that allows it to offer high performance transmission and maximum electrical characteristics, by preventing interference and minimizing signal loss.

These connector elements are all precisely dimensioned and constructed to achieve proper assembly. A true coaxial connection ensures the two elements are secured together without any loose parts, which would cause interference caused by stray signals. This in turn creates an effective seal that does not permit electromagnetic leakage (EMI), thereby preserving signal integrity.

The three elements of the coaxial connector are electrically insulated from each other, and the conductive properties of the inner conductor and outer shell provides a pathway for a current to flow. This in turn creates an electrically balanced path, with very low impedance, allowing signals to travel unimpeded and with minimal loss of signal. The main interface between the elements of the coaxial connector is the outer metallic sleeve, with the inner pin maintaining electrical continuity level. There is usually not any contact present between the inner conductor and the outer radiating shield. The outer sleeve is designed to provide the needed shielding to the connector, thereby providing optimal signal integrity.

Conclusion

Coaxial connectors are operational over a wide frequency range, with low loss characteristics and are reliable in maintaining signal integrity. This is achieved by providing electrical insulation between the components of the connector, as well as providing the necessary shielding to protect against electromagnetic interference (EMI). As such, RF coaxial connectors are employed in a wide variety of fields, such as data, radio, mobile telephony, and other broadcast technologies. As the connector becomes an integral part of the system, the quality of it can have a direct impact on the overall performance.

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