Below you will find the interface mating dimensions of different KMCO RF connectors. Whether a high quality male and female connector can mate together without any mechanical harm depends on the dimensions c, d, e, f, g and the thread type.
The table below shows IEEE-std-287 RF connector standards. The combinations with a check mark share the same specifications for the dimensions c, d, e, f, g and the thread type. Thus, these are mechanically compatible.
|SMA||3.50 mm||2.92 mm||2.40 mm||1.85 mm||1.00 mm|
Although mechanically compatible, the different interfaces still have different dimensions of the inner and outer connector (the dimensions a and b). Mechanically, this means that a conductor with a larger diameter connects with a smaller diameter conductor. The junction is not as smooth as if two connectors of the same type would mate. This “impurity” does influence the electrical performance. However, practically this influence is very small. In particular for data signals it is not noticeable.
IEEE-std-287 defines the interface names according to the inner diameter of the outer conductor (dimension b). Some manufactures, however, designate parts with their own names. These are not different connector standards; just different names. Thus they mate perfectly. The list below shows which designations are essentially referring to the same interface.
2.92 mm = K
1.85 mm = V
1.00 mm = W1
SMPM = Mini-SMP = GPPO™ = SSMP