Samtec - Specialized Electronic Interconnects - https://www.samtec.com/

Bulls Eye Test point system for reduced board trace lengths, higher performance and lower cost compared to traditional SMA test systems. The high-density array designs provide up to 4x the high-bandwidth signals in the same real estate as SMA connectors.
SAMTEC USA
520 Park East Boulevard, P.O. Box 1147, New Albany, IN 47151-1147, USA