SMA Connector Frequency Range Guide
That is where many SMA sourcing problems begin. The drawing says “SMA cable.” The buyer asks for RG58. The prototype radio works on the bench. Then the same assembly is used closer to the upper band, or routed through a tighter enclosure, or measured on a VNA instead of a basic functional test. Suddenly the result looks different: higher VSWR, more loss, unstable readings after the cable is moved.



















