Help me choose between SMA and N connector

Hi all,

I'am planning to build some RF modules, so I need informations about
connectors.
I must decide between N and/or SMA connectors.
My application should lie in region some GHz.
What types of connectors should I choose?

If I will buy the connectors in small quantities (10 to 20 pieces)
where can I get it in cheap prices ?

thanks and regards

above 1 giga is better SMA, you can buy it from jameco

SMA is much more mechanically convenient but has lower power rating compared to N. I assume you are operating under tens of Watts when I suggest SMA.

If you look at the minicircuits catalog, their N connector attenuators are rated to 6 GHz and the SMA ones are rated to 18 GHz.

Here's some info. Search Google for more:
http://www.wa1mba.org/rfconn.htm

In USA, Mouser has a pretty good selection of RF connectors. They sell small quantities.
http://www.mouser.com/

how much power rating of your system, if the power is low, you can choose the SMA, if the power rating is high(>100W), then use the N connector, that is OK?

N type is more rugger than SMA.
N is more "intuitive" if non-expert person should connect or disconnect.
Once connected to the opposite sex, N is splash proof, but remember that N and SMA are not rated as waterproof.
The cost and the rugger index depend on metal alloy. Stainless Steel is more expensive and more robust than Brass made connectors.

Hello,

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B/R
Daisy

Besides,SMA has smaller size which is also in sonsideration.

All the above are good to consider. Also, N type connectors can be tightened by hand (finger tight), whereas SMA should be tightened with a torque wrench.