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US 2023/0282952 A1Published application
Filter device
AssigneeFujikura Ltd.
InventorYusuke Uemichi
Life of this patent
Estimating the term…
Abstract
This invention can reduce the size of a filter device as compared to a conventional filter device having the same coupling degree. A filter device (1) includes: a substrate (11); strip-shaped conductors (12a1 to 12a5); and a ground conductor layer (13), an area facing an area interposed between adjacent ones of the strip-shaped conductors (between 12a1 and 12a2 and between 12a2 and 12a3) having a first recessed portion (recessed portions 11a1 and 11a2) having a surface covered with the ground conductor layer (13).
Claims7
A filter device comprising:
- a substrate which is made of a dielectric and which includes a first main surface and a second main surface facing each other;
- strip-shaped conductors which are provided to the first main surface and adjacent ones of which are electromagnetically coupled to each other;
- and
- a ground conductor layer provided at least to the second main surface, wherein
- an area of the first main surface which area is interposed between adjacent ones of the strip-shaped conductors is designated as an intermediate area, and an area of the second main surface which area faces the intermediate area has one or more first recessed portions having a surface covered with the ground conductor layer.
2 more elements
Dependencies are inferred from the claim text.