The SOLT-AUTO-F from Pico Technology is a 2-Port Automated Calibration Kit that operates from 300 kHz to 8.5 GHz. It is designed for PicoVNA Vector Network Analyzers and just requires one connection to conduct all calibrations. The process becomes automatic and highly repeatable, with power, control, and data read all managed by the PicoVNA software over a USB interface.
The SOLT-AUTO-F has a USB 2.0 (micro) port for control and power. It is available in an enclosure that measures 65 x 43 x 15 mm with 2x SMA-female (50-ohm) ports.