The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 24, 1998
Filed:
Oct. 13, 1995
Frank A Hegmann, Santa Barbara, CA (US);
Steven H Moffat, Hamilton, CA;
John S Preston, Dundas, CA;
Darcy G Poulin, Ontario, CA;
Com Dev Ltd., Cambridge, CA;
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.