What's the difference between K and SMA connectors?

[fishyxl]

What's the difference between K and SMA connectors?
I'm looking forward to your help.

 

[vfone]

K connectors have better quality and could be used up to 46GHz, when standard SMA could be used up to 26GHz
http://www.wa1mba.org/rfconn.htm

 

[fishyxl]

Are they of same dimensions?

 

[vfone]

Yes, K connector it is compatible with SMA

 

[marcomdd]

Are they of same dimensions?

They are mechanical compatible, but their dimensions are not exactly the same:

the inner diameter of the external conductor of the coaxial structure is 2.92 mm for the K connector and 3.5 mm for the sma connector.

In addition the dielectric material isn't the same:

SMA --> teflon
K --> air

They are not electricatly compatible.

Obviously these mismatch effectes could be often neglected .

 

[marcomdd]

Are they of same dimensions?

They are mechanical compatible, but their dimensions are not exactly the same:

the inner diameter of the external conductor of the coaxial structure is 2.92 mm for the K connector and 3.5 mm for the sma connector.

There is an arror in the previous post: (as SERGIO MARIOTTI told me) the diameter for the SMA is 4.3mm and not 3.5mm.

Sorry.

 

[Puppet1]

check new thomas lee book: planar microwave engineering