The LANGER near-field probes RF and LF1 use SMA-BNC, whereas XF1 uses SMA-SMA. Is there a reason for this?

The LANGER near-field probes RF and LF1 use SMA-BNC, whereas XF1 uses SMA-SMA. Is there a reason for this?

XF1 (30MHz to 6GHz) uses SMA-SMA because of its high-frequency characteristics.
BNC connectors support frequencies up to approximately 3GHz. *Reference: The conversion connector for connecting 00-00014A to XF1 is 00-00137A (N(P)-SMA(J)).