GT21 Automotive Antenna Coaxial Cable Connectors Hirose Electric GT21 Automotive Antenna Coaxial Cable Connectors feature a coaxial termination system that allows crimping of the center and outer conductors in one easy step. The cable assembly is finished without touching the center conductor providing precise center conductor positioning and consistent, repeatable cable assemblies. A one-step termination process delivers precision assembly in significantly less time. GT21 enhanced connectors are designed to save space and are up to 10% smaller than competing designs. GT21 devices significantly reduce the required PCB real estate, resulting in a more compact antenna design solution. With a voltage standing wave ratio (VSWR) of 1.5 maximum (DC to 2.5GHz), the compact GT21 connectors feature excellent performance characteristics in a small space. GT21 Automotive Antenna Connector provides a reliable, positive lock structure with visual indication and a positive tactile click. This structure helps to provide a secure lock and prevent incomplete locking.