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US 2026/0171641 A1Published application
Filter group and wireless communication module
AssigneeFujikura Ltd.
InventorYuta Hasegawa
Life of this patent
Estimating the term…
Abstract
To improve isolation between a plurality of filters formed in a single multilayer substrate, in a filter group (10), a first filter and a second filter (filters 10a and 10b) formed in the multilayer substrate (11) each include a strip line constituted by a signal pattern (14a, 14b) and paired ground conductor layers (12, 13), and a first area (area 13a) and a second area (area 13b) in the ground conductor layer (13) are disconnected from each other.
Claims6
A filter group including a first filter and a second filter that are formed in a single multilayer substrate,
- the first filter and the second filter each including a strip line constituted by a signal pattern formed in an inner layer of the multilayer substrate and paired ground conductor layers that are formed on respective paired main surfaces of the multilayer substrate and that sandwich the signal pattern,
- the paired ground conductor layers each including, in a case where the signal pattern is seen in a plan view, a first area overlapping the signal pattern of the first filter and a second area overlapping the signal pattern of the second filter,
- the first area and the second area in at least one of the paired ground conductor layers being disconnected from each other.
Dependencies are inferred from the claim text.