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:
Dec. 11, 1979
Filed:
Mar. 27, 1978
David J Gunton, West Malvern, GB;
Abstract
A microstrip or stripline coupling device in which coupling is effected between two spaced transmission line electrodes at least one of which is a comb electrode comprising a bus bar having a series of electrode fingers projecting transversely from both sides thereof along the coupled length. Preferably both electrodes are comb electrodes, the fingers of which are interdigitated to improve the coupling. In a broadband coupler in accordance with the invention, the difference between the phase constants of the two electrodes is varied along the coupled length, e.g. by varying the lengths of the fingers, enabling the concept of warped mode coupling to be realized. Preferably also the coupling coefficient between the two electrodes is varied along the coupled length, e.g. by varying the spacing between the electrodes or the degree of overlap between the electrode fingers.