50 Ohm RF DC Return

An extension of the low-resonance broadband bias tee technology developed by SHF has led to broadband DC return devices, the SHF DCR65 and SHF DCR45. Digital modules often need a 50 Ohm path to ground so that a current is able to flow, but this current may be undesirable in the rest of the circuit. An unterminated optical detector (PIN without internal on-chip resistor) would require such a DC return to sink the photocurrent as well as minimizing unwanted reflections due to long physical length between the detector and the external load.