Ultra-Broadband Silicon Capacitors Murata Ultra-Broadband Silicon Capacitors are ideal for optical communication systems (ROSA/TOSA, SONET, and all optoelectronics) as well as high-speed data systems or products. These deep trench silicon capacitors are designed for DC blocking, feedback, coupling, and bypass grounding applications. The modules offer low insertion loss, low reflection, and high phase stability from 16kHz to 60GHz for the UBSC/UBEC series and up to 20GHz for the ULSC series as well as high rejection up to 26GHz for the UWSC devices. Murata Ultra-Broadband Silicon Capacitors have been developed with a semiconductor MOS process.