AFI RF Connector Interface Amphenol AFI RF Connector Interface solves packaging design issues by compensating for mechanical misalignment in stacked PCBs and daughterboard / motherboard applications. The AFI interface utilizes a proprietary configuration that allows for an industry-leading 'float' to compensate for the axial and radial misalignment due to packaging tolerances. This float results in a maximum misalignment allowed by the system of ±0.38mm (0.015') radial float and ±0.50mm (0.020') axial float. The AFI interface is available in both 75Ω and 50Ω configurations. Amphenol AFI RF Connector Interface is ideal for military and broadband applications.