Patent US1473308A successfully refreshed from Google Patents.
Patent US6373350B1 successfully refreshed from Google Patents.
US6373350B1
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US
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Branching filter with saw-resonator transmitting and receiving filters in separate packages and receiving-branch lines in both packages
Assignee: Intellectual Ventures Holding 81 LLC
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Filing: 1999-12-01
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Granted: 2002-04-16
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Expires: 2019-12-01
Abstract
Abstract A branching filter includes a transmitting filter and a receiving filter, both of the SAW-resonator type. The transmitting filter and receiving filter are housed in separate packages. The packages also include coupling circuitry and other necessary circuit elements such as inductor-capacitor chips. Accommodation of the SAW-resonator-type filters and other circuit elements in two separate packages leads to improved performance characteristics.
Inventors
- 👤 Yoshiaki Fujita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:03
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/38; H04B1/40; H04B1/50; H04B1/52; H03; H03H; H03H9/00; H03H9/02; H03H9/05; H03H9/0538; H03H9/0566; H03H9/0576; H03H9/70; H03H9/72; H03H9/725
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
93 words
A branching filter employing surface-acoustic-wave-resonator-type filters as a transmitting filter and a receiving filter, having an antenna terminal for coupling the transmitting filter and the receiving filter to an antenna, the transmitting filter and receiving filter having different passbands, comprising: a first package accommodating said transmitting filter; a second package accommodating said receiving filter; and a receiving-branch signal line coupling the receiving filter to the antenna terminal, the receiving-branch signal line being divided into a first signal line accommodated in said first package and a second signal line accommodated in said second package.
Claim 2
Dependent Claim
93 words
A branching filter employing surface-acoustic-wave-resonator-type filters as a transmitting filter and a receiving filter, having an antenna terminal for coupling the transmitting filter and the receiving filter to an antenna, the transmitting filter and receiving filter having different passbands, comprising: a first package accommodating said transmitting filter; a second package accommodating said receiving filter; and a receiving-branch signal line coupling the receiving filter to the antenna terminal, the receiving-branch signal line being divided into a first signal line accommodated in said first package and a second signal line accommodated in said second package.
Claim 3
Dependent Claim
21 words
The branching filter of claim 1 , further comprising a transmitting-branch signal line coupling the transmitter filter to said antenna terminal.
Claim 4
Dependent Claim
59 words
The branching filter of claim 1 , wherein: said first package is a multilayer package and said first signal line comprises a first stripline formed in an internal layer of said first package; and said second package is a multilayer package and said second signal line comprises a second stripline formed in an internal layer of said second package.
Claim 5
Dependent Claim
25 words
The branching filter of claim 1 , wherein said first signal line and said second signal line are coupled in series with said receiving filter.
Claim 6
Dependent Claim
29 words
The branching filter of claim 1 , further comprising chips disposed in said first package and said second package, each of said chips comprising an inductor and a capacitor.
Claim 7
Dependent Claim
37 words
The branching filter of claim 5 , wherein one of said chips is disposed between said transmitting filter and a transmitting terminal and another of said chips is disposed between said receiving filter and a receiving terminal.
Claim 8
Dependent Claim
25 words
The branching filter of claim 5 , wherein one of said chips couples said antenna terminal with said transmitting filter and said receiving-branch signal line.
References Cited (Backward Citations)
JPH0229109A
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JPH066170A
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JPH0697761A
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JPH0738376A
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JPH07226607A
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JPH0884045A
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JPH08191230A
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JPH09181567A
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JPH1117495A
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JPH10270976A
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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) | 2005-04-15 | 2005-10-15 | 2006-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-04-15 | 2009-10-15 | 2010-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-04-15 | 2013-10-15 | 2014-04-16 | $7700.00 | Window Closed / Lapsed |