Amphenol RF AMC Connector Series Amphenol RF's AMC (Micro Coaxial) Connector series family is used in applications with 50Ω impedance requirements. AMC Connector is low profile (2.5mm of the board) and offers an extremely small board footprint (3mm x 3mm). Amphenol RF manufactured the AMC connector for wireless internet, RFID, Bluetooth, Inventory/Barcode Scanners, and handheld device applications.