Voltage controlled superconducting microwave switch and method of operation thereof
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United States of America Patent
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Nov 24, 1998
Grant Date -
N/A
app pub date -
Oct 13, 1995
filing date -
Oct 13, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A low insertion loss, wide bandwidth, microwave switch has a superconducting transmission line that can reversibly go from a superconducting state to a normal state by the application of a DC voltage. When in the normal state, the switch is 'off' and microwave signals are attenuated. To reduce the voltage necessary to cause switching, the width of the transmission line is decreased. This decrease in voltage is accomplished in a controlled manner so that there are no spurious reflections produced on the line, resulting in a wide operating bandwidth. Previous microwave switches use other means to switch between superconducting and normal and suffer from disadvantages such as relatively slow switching time, complexity or narrow bandwidths as a result.
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