Band elimination filter and composite filter
US-10848128-B2 · Nov 24, 2020 · US
Surface acoustic wave device
US8994479B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8994479-B2 |
| Application number | US-201013390905-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 25, 2010 |
| Priority date | Aug 25, 2009 |
| Publication date | Mar 31, 2015 |
| Grant date | Mar 31, 2015 |
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- Title
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Abstract
Official abstract text for this publication.
A surface acoustic wave SAW (SAW) device has a substrate and a filter provided at the substrate. The filter has a plurality of interdigital transducers (IDT) electrodes arranged along a propagation direction of a SAW. Each of the plurality of IDT electrodes has an electrode finger group including a plurality of electrode fingers which extent in a direction orthogonal to the propagation direction and are arranged along the propagation direction. At least one of the plurality of IDT electrodes has a wide pitch section including an adjacent first and second electrode finger among the plurality of electrode fingers. The interval between the first electrode finger and the second electrode finger is larger than the average value of the intervals between the remaining electrode fingers of the plurality of electrode fingers.
First claim
Opening claim text (preview).
The invention claimed is: 1. A surface acoustic wave device, comprising: a piezoelectric substrate and a surface acoustic wave filter comprising a plurality of interdigital transducer (IDT) electrodes which are provided on the piezoelectric substrate and are arranged along a propagation direction of a surface acoustic wave, wherein each of the plurality of IDT electrodes comprises a group of electrode fingers which extend in a direction orthogonal to the propagation direction…
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Classifications
- H03H9/14582Primary
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
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Frequently asked questions
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- What does patent US8994479B2 cover?
- A surface acoustic wave SAW (SAW) device has a substrate and a filter provided at the substrate. The filter has a plurality of interdigital transducers (IDT) electrodes arranged along a propagation direction of a SAW. Each of the plurality of IDT electrodes has an electrode finger group including a plurality of electrode fingers which extent in a direction orthogonal to the propagation directio…
- Who is the assignee on this patent?
- Shimozono Masahisa, Kyocera Corp
- What technology area does this patent fall under?
- Primary CPC classification H03H9/14582. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Mar 31 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).