SMA
SubMiniature version A
Invented in
1960s
Invented by
Bert Weinschel & James Cheal
Availability
Common (RF)
A small threaded RF connector found on Wi-Fi and radio antennas, SDRs and test equipment. Gold-plated and screw-coupled for a stable high-frequency connection.
Technical specifications
Introduced1960s
SignalRF microwave
Impedance50 Ω
RangeDC to 18 GHz
Found on
a routeran antenna
Recommended brands
01Amphenol
02Huber+Suhner
03Telegärtner
Where to buy
Europe-focused retailer searches. Some links are affiliate links and may earn a commission.
Common adapters and cables
Fun fact
It works cleanly all the way up to 18 GHz, which is why it sits on everything from router antennas to lab signal generators.
Tips & tricks
Finger-tight is enough; a torque wrench avoids under- or over-tightening lab gear.
Philosophy
Tiny, golden and precise. The SMA is what RF engineers reach for when the signal is fast and the budget for loss is zero.
Applications
InternetVideo / SAT
