H - Electricity – 01 – P
Patent
H - Electricity
01
P
333/10
H01P 5/18 (2006.01)
Patent
CA 1085472
DIRECTIONAL COUPLER Abstract of the Disclosure The invention is an improvement over the conventional branch guide directional coupler and gives better performance by provid- ing flatter coupling over a broader band. A branch guide (line) directional coupler fundamentally is a four port electrical network. The invention improves the performance of the convention- al branch guide coupler by employing matching devices at the ports of the fundamental network. In most embodiments of the invention, it is contemplates that matching devices will be used at each of the ports and that all those matching devices will be of like construction. However, it is not essential that a matching device be employed at every port nor is it essential that all the match- ing devices be of like construction. For example, in some embodiments of the invention, matching structures need be employed only at the output ports. In the stripline and microstrip embodi- ments of the invention the matching device can be formed by a half wavelength open-circuited stub in combination with A quarter wavelength transformer or by a short-circuited quarter wavelength stub in combination with a quarter wavelength transformer. Although the invention is described principally in stripline or microstrip form, the invention can also be embodied in waveguide or coaxial form. 1.
279339
Ogilvy Renault
Riblet Gordon P.
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