Patent US855629A successfully refreshed from Google Patents.
US5481231A
Expired / Lapsed
US
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Lumped element four port coupler
Assignee: General Dynamics Mission Systems Inc
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Filing: 1994-06-21
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Granted: 1996-01-02
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Expires: 2014-06-21
Abstract
Abstract A four port coupler includes a first port adapted to impedance match to a first impedance Z o , a second port adapted to impedance match to a second impedance Z 1 different than the first impedance, a third port adapted to impedance match to the first impedance and a fourth port adapted to impedance match to the second impedance.
Inventors
- 👤 Michael Dydyk
- 👤 Craig E. Lindberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:44
CPC Classifications
H; H04; H04L; H04L27/00; H04L27/18; H04L27/20; H04L27/2032; H04L27/2035; H04L27/2039; H03; H03C; H03C3/00; H03C3/10; H03C3/12; H03C3/22; H03H; H03H7/00; H03H7/52; H03C2200/00; H03C2200/0037; H03C2200/0058
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
191 words
A four port coupler comprising: a first port having a first impedance Z o ; a second port having a second impedance Z 1 , wherein said first impedance Z o is related to said second impedance Z 1 by a factor in the range of from one and one half to ten; a third port having said first impedance; and a fourth port having said second impedance; a first inductor having a first lead coupled to said first port and a second lead coupled to ground; a first capacitor having a first lead coupled to said first port and a second lead coupled to said second port; a second inductor having a first lead coupled to said second port and a second lead coupled to ground; a second capacitor having a first lead coupled to said second port and a second lead coupled to said third port; a third inductor having a first lead coupled to said third port and a second lead coupled to said fourth port; and a third capacitor having a first lead coupled to said first port and a second lead coupled to said fourth port.
Claim 2
Dependent Claim
191 words
A four port coupler comprising: a first port having a first impedance Z o ; a second port having a second impedance Z 1 , wherein said first impedance Z o is related to said second impedance Z 1 by a factor in the range of from one and one half to ten; a third port having said first impedance; and a fourth port having said second impedance; a first inductor having a first lead coupled to said first port and a second lead coupled to ground; a first capacitor having a first lead coupled to said first port and a second lead coupled to said second port; a second inductor having a first lead coupled to said second port and a second lead coupled to ground; a second capacitor having a first lead coupled to said second port and a second lead coupled to said third port; a third inductor having a first lead coupled to said third port and a second lead coupled to said fourth port; and a third capacitor having a first lead coupled to said first port and a second lead coupled to said fourth port.
Claim 3
Dependent Claim
36 words
A coupler as claimed in claim 1, wherein said first, second and third capacitors each have a capacitance C given as: C=(2·Z.sub.o ·Z.sub.1).sup.-0.5 ω.sub.o, wherein ω o is a nominal center radian frequency of said coupler.
Claim 4
Dependent Claim
32 words
A coupler as claimed in claim 1, wherein said third inductor has an inductance L given as: L=(2·Z.sub.o ·Z.sub.1).sup.0.5 ω.sub.o, wherein ω o is a nominal center radian frequency of said coupler.
Claim 5
Dependent Claim
25 words
A coupler as claimed in claim 1, wherein said first and second inductors have inductance of one-half of said inductance L of said third inductor.
Claim 6
Dependent Claim
14 words
A coupler as claimed in claim 4, wherein said coupler comprises a monolithic circuit.
Claim 7
Dependent Claim
190 words
A four port coupler comprising: a first port having a first impedance Z o ; a second port having a second impedance Z 1 , wherein said first impedance Z o is related to said second impedance Z 1 by a factor in the range of one and one half to ten; a third port having said first impedance; and a fourth port having said second impedance; a first inductor having a first lead coupled to said first port and a second lead coupled to said second port; a first capacitor having a first lead coupled to said first port and a second lead coupled to ground; a second capacitor having a first lead coupled to said second port and a second lead coupled to ground; a second inductor having a first lead coupled to said second port and a second lead coupled to said third port; a third capacitor having a first lead coupled to said third port and a second lead coupled to said fourth port; and a third inductor having a first lead coupled to said fourth port and a second lead coupled to said first port.
Claim 8
Dependent Claim
190 words
A four port coupler comprising: a first port having a first impedance Z o ; a second port having a second impedance Z 1 , wherein said first impedance Z o is related to said second impedance Z 1 by a factor in the range of one and one half to ten; a third port having said first impedance; and a fourth port having said second impedance; a first inductor having a first lead coupled to said first port and a second lead coupled to said second port; a first capacitor having a first lead coupled to said first port and a second lead coupled to ground; a second capacitor having a first lead coupled to said second port and a second lead coupled to ground; a second inductor having a first lead coupled to said second port and a second lead coupled to said third port; a third capacitor having a first lead coupled to said third port and a second lead coupled to said fourth port; and a third inductor having a first lead coupled to said fourth port and a second lead coupled to said first port.
Claim 9
Dependent Claim
32 words
A coupler as claimed in claim 6, wherein said third capacitor has a capacitance C given as: C=(2·Z.sub.o ·Z.sub.1).sup.-0.5 ω.sub.o, wherein ω o is a nominal center radian frequency of said coupler.
Claim 10
Dependent Claim
25 words
A coupler as claimed in claim 7, wherein said first and second capacitors have a capacitance of twice said capacitance C of said third capacitor.
Claim 11
Dependent Claim
35 words
A coupler as claimed in claim 6, wherein said first, second and third inductors have an inductance L given as: L=(2·Z.sub.o ·Z.sub.1).sup.0.5 /ω.sub.o, wherein ω o is a nominal center radian frequency of said coupler.
Claim 12
Dependent Claim
14 words
A coupler as claimed in claim 9, wherein said coupler comprises a monolithic circuit.
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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) | 1999-01-01 | 1999-07-03 | 2000-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-01-01 | 2003-07-03 | 2004-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-01-01 | 2007-07-03 | 2008-01-02 | $7700.00 | Window Closed / Lapsed |