The series of SMA connector is a precision sub-minimal connector interface for coaxial cable with a screw type coupling mechanism. The connector has 50 ohm impedance. It offers excellent electrical performance from DC to 18Ghz. It is often used for providing RF connectivity between cables, boards, and many microwave components including filters, attenuators, mixers, and oscillators. SMA and precision SMA-like connectors are by far the most popular, small, threaded coaxial connectors.
![SMA射频同轴连接器]( "SMA射频同轴连接器")
The main technical specifications of SMA connectors are as follows:
Temperature range: - 65 ~ + 165 ° C (PE Cable - 40 ~ + 85 ° C)
Vibration: Vibration mil-std-202,Method 213
The characteristic impedance: 50 Ω Ω / 75
Frequency range: DC ~ 12.4ghz (semi-rigid cable 0 ~ 18GHz)
Operating voltage: 335V Max (effective value)
Pressure resistance: 1000V RMS (minimum sea level)
Contact resistance:
Between the inner conductor: 3 m or less Ω
Between the outer conductor: Ω 2 m or less
Insulation resistance: 5000 M Ω or higher
Insertion loss: 0.15db /6GHz
Voltage standing wave ratio :Straight :Straight flexible cable 1.10+0.002f semi-rigid cable 1.05+0.001f
Bending type Right Angle soft cable 1.20+0.003f semi-rigid cable 1.10+0.001f
Durability: cycles
Material and coating
Case: brass (plating: gold plated, nickel plated, ternary alloy) [or stainless steel passivation]
Central conductor: brass, beryllium copper, phosphorous copper (plating: gold plated, nickel plated
Elastic contacts: beryllium bronze plated hard gold
Insulator: ptfe
Compression sleeve: copper alloy nickel plated or gold plated
O seal: silicone rubber
SMA connector APPLICABLE STANDARD
MIL - C - 39012.
CECC 22110;
IEC 60169-15.