Title :
A reflective microwave switch made of Tl-Ca-Ba-Cu-O for signal control applications
Author :
Martens, J.S. ; Hietala, V.M. ; Zipperian, T.E. ; Ginley, D.S. ; Tigges, C.P. ; Hohenwarter, G.K.G.
Author_Institution :
Sandia Nat. Lab., Albuquerque, NM, USA
Abstract :
A thermal thin-film high-temperature superconductor (HTS) switch that is easily inserted into high-performance HTS transmission lines is presented. A microwave switch in Tl-Ca-Ba-Cu-O has been developed based on driving a small bridge, embedded in a transmission line, normal via current in an external control line. In the on-state, insertion loss was less than 1 dB over the tested range of 0.5-8.5 GHz. Isolation in the off-state exceeded 30 dB over this frequency range. Response times are on the order of a microsecond, adequate for many microwave/millimeter-wave applications such as switched phase shifters.<>
Keywords :
barium compounds; calcium compounds; high-temperature superconductors; solid-state microwave devices; superconducting devices; superconducting thin films; switches; thallium compounds; 0.5 to 8.5 GHz; 1 dB; SHF; Tl-Ca-Ba-Cu-O; high-temperature superconductor; insertion loss; reflective microwave switch; signal control applications; thin-film; transmission lines; Bridges; Delay; Frequency; High temperature superconductors; Insertion loss; Phase shifters; Superconducting thin films; Superconducting transmission lines; Switches; Testing;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
