Filter and radio communication apparatus using the same

Details Filter and radio communication apparatus using the same Filter and radio communication apparatus using the same

2006-09-13

2009-02-24

Jeanglaude, Jean B (Department: 2819)

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

C333S132000

Reexamination Certificate

active

07495531

ABSTRACT:
A filter contains first and second resonators adjacent to each other in a first direction, each of the first resonator and the second resonator comprising a pair of first microstrip lines formed on a first region in a second direction perpendicular to the first direction and each having an open end and other end and a first width, and a second microstrip line arranged on a second region in the second direction, and connected between other ends of the pair of first microstrip lines, and having a second width smaller than the first width, wherein a minimum distance between the first microstrip lines adjacent to the first resonator and the second resonator is set at a value smaller than a minimum distance between the second microstrip lines adjacent to the first resonator and the second resonator.

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