Diplexer
AssigneeMurata Manufacturing Co., Ltd.
InventorsAkira TANAKA, Hiroto MOTOYAMA
Life of this patent
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Abstract
A diplexer includes a first filter defining a high-pass filter, and a second filter defining a low-pass filter adjacent to the first filter. The first filter includes a first electrode in a first dielectric layer, a second electrode defining a ground electrode in a second dielectric layer, capacitor electrodes between the first electrode and the second electrode, open vias respectively connecting the first electrode and the capacitor electrodes, and short-circuit vias connecting the first and second electrodes. At least one of the open vias is located at a position closer to a boundary surface between the first and second filters than at least one of the short-circuit vias.
Claims17
A diplexer comprising:
- a plurality of dielectric layers that are laminated;
- a first filter defining a high-pass filter;
- and
- a second filter defining a low-pass filter adjacent to the first filter to pass signals in a frequency band lower than a passband of the first filter;
- wherein
- the first filter includes:
- a first electrode in a first dielectric layer among the plurality of dielectric layers;
- a second electrode defining a ground electrode in a second dielectric layer different from the first dielectric layer among the plurality of dielectric layers;
- a plurality of capacitor electrodes between the first electrode and the second electrode;
- a plurality of open vias respectively connecting the first electrode and the plurality of capacitor electrodes;
- and
- a plurality of short-circuit vias connecting the first electrode and the second electrode;
- and
- at least one of the plurality of open vias is located at a position closer to a boundary surface between the first filter and the second filter than at least one of the plurality of short-circuit vias.
Dependencies are inferred from the claim text.