Electronic tuning circuit having image trapping element

Details Electronic tuning circuit having image trapping element Electronic tuning circuit having image trapping element

H - Electricity

03

J

365/9

H03J 7/08 (2006.01) H01P 1/203 (2006.01) H03D 7/18 (2006.01) H03J 3/18 (2006.01)

Patent

CA 1130937

ABSTRACT OF THE DISCLOSURE: A tuning circuit comprises a pair of identical resonant circuits each including a transmission line and a capacitive element, a coupling circuit associated with each transmission line to inject microwave energy into the resonant circuits and extract the tuned energy therefrom. An image trapping circuit is included which comprises a first section which intersects one of the tranmission lines and connected to the coupling circuit associated with the intersected trans- mission line and a second section which extends from the point of connection of the first section with that coupling element to the opposite transmission line in a direction skewed relative to each transmission line. The second section of the image trap circuit provides a smooth interstage coupling between the two transmission lines over a range of resonant frequencies.

321478

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