SWITCHED YBA2CU3O7 LUMPED ELEMENT BANDSTOP FILTER

The switching capability of a simple high temperature superconducting (HTS) lumped element bandstop filter is demonstrated. A bias current o f the order of the critical current of the HTS material is necessary t o switch the filter response from high to low attenuation at the stop- band frequency. A simple theoretical model to describe the ON and OFF states is presented. First measurements of the response time to a puls ed bias current show that the switching time is < 2 mu s.