Patent US6768396B2 successfully refreshed from Google Patents.
US6768396B2
Expired / Lapsed
US
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Filter arrangement
Assignee: Qorvo US Inc
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Filing: 2000-12-21
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Granted: 2004-07-27
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Expires: 2020-12-21
Abstract
Abstract The invention describes a filter arrangement comprising a bandpass filter and a notch filter. The coupling of a notch filter, which consists of a capacitor and an inductance, to a bandpass filter comprising resonators achieves a better suppression outside the passband. The two filters can be manufactured on one substrate ( 1 ) in a small space through the use of thin-film techniques. Moreover, a transmitter, a receiver, a mobile telephone appliance, and a wireless data transfer system with such a filter arrangement are disclosed, as is a method of manufacturing such a filter arrangement.
Inventors
- 👤 Mareike Katharine Klee
- 👤 Hans Peter Löbl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:39
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/46; H03H9/54; H03H9/58; H03H9/60; H03H9/605; H03H3/00; H03H3/007; H03H3/02; H03H9/02; H03H9/02007; H03H9/02086; H03H9/02094; H03H9/02149; H03H9/542; H03H9/581
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
127 words
A method of manufacturing a filter arrangement, which comprises a substrate and provided thereon a bandpass filter of bulk acoustic wave resonators and a notch filter, by which method a second electrode ( 5 ), a piezoelectric layer ( 4 ), and a first electrode ( 3 ) are provided sequentially on a carrier layer with said second electrode ( 5 ) adjoining said carrier layer, and are structured such that at least one resonator unit, a capacitor, and an inductance are created, a reflection element ( 2 ) is deposited on those portions of the first electrode ( 3 ) which belong to the resonator unit, a substrate ( 1 ) is fastened on said first electrode ( 3 ), and the carrier layer is removed.
Claim 2
Independent Claim
127 words
A method of manufacturing a filter arrangement, which comprises a substrate and provided thereon a bandpass filter of bulk acoustic wave resonators and a notch filter, by which method a second electrode ( 5 ), a piezoelectric layer ( 4 ), and a first electrode ( 3 ) are provided sequentially on a carrier layer with said second electrode ( 5 ) adjoining said carrier layer, and are structured such that at least one resonator unit, a capacitor, and an inductance are created, a reflection element ( 2 ) is deposited on those portions of the first electrode ( 3 ) which belong to the resonator unit, a substrate ( 1 ) is fastened on said first electrode ( 3 ), and the carrier layer is removed.
Claim 3
Dependent Claim
18 words
The method of claim 1 characterized in that the bandpass filter and the notch filter are thin-film filters.
Claim 4
Dependent Claim
31 words
The method of claim 1 , wherein said carrier layer consist of a ceramic material, a ceramic material with a planarizing layer of glass, a glass-ceramic material, silicon, GaAs or sapphire.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2007-07-27 | 2008-01-26 | 2008-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-07-27 | 2012-01-26 | 2012-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-07-27 | 2016-01-26 | 2016-07-27 | $7700.00 | Window Closed / Lapsed |