What is the difference between the purpose of sma connector and Bnc connector

1. SMA Connector

     The applicable frequency range is 0~18GHz. It is an ultra-small, suitable for semi-rigid or flexible RF coaxial cable connection. It has the characteristics of small size, superior performance, high reliability and long service life. However, ultra-small connectors are easily damaged in engineering, and are suitable for microwave applications requiring high performance, such as the internal connection of microwave equipment.

2.BNC Connector

     The applicable frequency range is 0~4GHz, and it is a coaxial cable connector with a bayonet connection mechanism for low power. This connector can be quickly connected and disconnected, and has the characteristics of reliable connection, good vibration resistance, convenient connection and separation, etc. It is suitable for frequent connection and separation occasions, and is widely used in radio equipment and test instruments to connect coaxial RF cables.

     The characteristic impedance is very important, otherwise it will cause mismatch. When the impedance is matched, the maximum output power can be obtained, and the equipment utilization efficiency is extremely high; when the impedance is not matched, the output effective power will be reduced; when the external impedance is equal to the internal impedance of the device, it becomes Impedance matching.