Selection of RF connector

Selection of RF connector

Choose RF connector to consider the following and aspects:

Connector Interface(SMA,SMB,BNCWait)

Electrical properties, cables and cable connections

Terminal form(PCBoards, cables, panels, etc.)

Mechanical structure and plating

1. Connector Interface

The connector interface is usually determined by the application, but at the same time to meet the electrical and mechanical performance requirements.

BMAType connectors are used for frequencies up18GHzBlind plug connections for low power microwave systems.

BNCThe type connector adopts bayonet connection and is mostly used for frequency lower4GHzThe radio frequency connection is widely used in the field of network systems, instrumentation and computer interconnection.

TNCIn addition to the screw, its interface andBNCsimilar in11GHzCan still use excellent performance under vibration conditions.

SMAScrew connectors are widely used in aviation, radar, microwave communications, digital communications and other fields. Its impedance has50When Ω is used with flexible cable, the operating frequency is lower12.4GHzWhen equipped with semi-rigid cables, the highest frequency of use is up26.5GHz,75Ω has broad application prospects in digital communication.

SMBvolume lessSMA, For the insertion of self-locking structure, easy to quickly connect, the most typical application is digital communication isL9Business of replacement products50Nmeet4GHz,75Ω is used2GHz.

SMCwithSMBThe similar screw ensures stronger mechanical properties and a wider frequency range, mainly used in military or high vibration environments.

NThe type screw connector uses air as the insulating material at low cost, and the impedance is50Ω and75Ω, frequency up11GHzIt is usually used on regional networks, media dissemination and test instruments.

MCX,MMCXThe series connectors are small in size and reliable in contact. They are the preferred products to meet the needs of intensive and miniaturization, and have a wide range of applications.

• Electrical properties, cables and cable connections

A.Impedance:

The connector should match the impedance of the system and cable, and it should be noted that not all connector interfaces meet the requirements.50Ω or75Ω impedance, impedance mismatch will cause system performance degradation.

B.Voltage:

Ensure that the maximum withstand voltage of the connector cannot be exceeded during use.

3. Maximum operating frequency
4. Cable

3. termination form

Connectors can be used for RF coaxial cables, printed wiring boards, and other connection interfaces. Practice has proved that a certain form of connector and a certain type of cable match, generally small diameter of the cable andSMA,SMBandSMCSuch as small coaxial connector.

• Mechanical structure and plating layer

The material and structure of the connector affect the processing difficulty and processing efficiency of the connector, so the user should reasonably choose the connector with good performance-price ratio according to their application environment.