Resonant circuit, filter circuit, and antenna device

Details Resonant circuit, filter circuit, and antenna device Resonant circuit, filter circuit, and antenna device

2007-05-21

2010-11-02

Cho, James H. (Department: 2819)

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

C333S219100, C333S230000

Reexamination Certificate

active

07825751

ABSTRACT:
In resonant elements102to105constituting a resonant circuit, an uncontrolled cross coupling which exists between two resonant elements is controlled by using a coupling element106which is newly arranged between the resonant elements, whereby it is possible to create a state where two resonant elements are not coupled with each other or a state where the amount of the coupling is reduced, which states are difficult to be realized on a plane. As a result, it is possible to improve characteristics of a planar filter.

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