Ultra-high RF voltage antenna tuning SP4T with resonance stoppers The BGSA146MN10 is a single-pole four-throw (SP4T) antenna tuning switch optimized for RF applications up to 7.125 GHz. It integrates four low-ON-resistance/low-OFF-capacitance series switches and four shunt-to-ground switches, enabling on-demand open-reflective or short-reflective behavior of the OFF ports.