Patent US5767754A successfully refreshed from Google Patents.
US5767754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balanced to unbalanced transmission line impedance transformer exhibiting low insertion loss
Assignee: Arris Enterprises LLC
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Filing: 1997-01-24
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Granted: 1998-06-16
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Expires: 2017-01-24
Abstract
Abstract A balanced to unbalanced transmission line transformer is disclosed performing impedance transformation with improved frequency response across a wide operational bandwidth. The transmission line transformer significantly improves low frequency output balance by adding an additional transformer winding. The additional winding improves the low frequency response to less than 0.2dB across a given design bandwidth.
Inventors
- 👤 Rudy Menna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:30
CPC Classifications
H; H03; H03H; H03H7/00; H03H7/42
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
216 words
A broadband impedance matching device for coupling a signal having a predetermined frequency bandwidth between a balanced circuit having two signal carrying conductors and an unbalanced circuit having one signal carrying conductor comprising: a first node for coupling with a first balanced circuit signal carrying conductor; a second node for coupling with a second balanced circuit signal carrying conductor; a third node for coupling with the unbalanced circuit signal carrying conductor; a fourth node for coupling to a ground; a first transformer having a magnetic core and a first and a second winding, each winding having a predetermined number of turns and a first and second end; a second transformer having a magnetic core and a first, a second and a third winding, each winding having a predetermined number of turns and a first and second end; said first transformer first winding first end coupled to said first node and said first transformer first winding second end coupled to said third node; said second transformer second winding first end coupled to said second node and said second transformer second winding second end coupled to said fourth node; and said second transformer third winding is a balance winding having its first end coupled to said fourth node and its said second end coupled to said first node.
Claim 2
Dependent Claim
216 words
A broadband impedance matching device for coupling a signal having a predetermined frequency bandwidth between a balanced circuit having two signal carrying conductors and an unbalanced circuit having one signal carrying conductor comprising: a first node for coupling with a first balanced circuit signal carrying conductor; a second node for coupling with a second balanced circuit signal carrying conductor; a third node for coupling with the unbalanced circuit signal carrying conductor; a fourth node for coupling to a ground; a first transformer having a magnetic core and a first and a second winding, each winding having a predetermined number of turns and a first and second end; a second transformer having a magnetic core and a first, a second and a third winding, each winding having a predetermined number of turns and a first and second end; said first transformer first winding first end coupled to said first node and said first transformer first winding second end coupled to said third node; said second transformer second winding first end coupled to said second node and said second transformer second winding second end coupled to said fourth node; and said second transformer third winding is a balance winding having its first end coupled to said fourth node and its said second end coupled to said first node.
Claim 3
Dependent Claim
88 words
The broadband impedance matching device of claim 1 wherein: said first transformer second winding first end coupled to said second node and said first transformer second winding second end coupled to an end of a transformer winding which winding has an opposite end coupled to said first node; and said second transformer first winding first end coupled to said first node and said second transformer first winding second end coupled to an end of a transformer winding which winding has an opposite end coupled to said second node.
Claim 4
Dependent Claim
56 words
The broadband impedance matching device of claim 2 wherein said end of a transformer winding which winding has an opposite end coupled to said first node is said second transformer first winding and said end of a transformer winding which winding has an opposite end coupled to said second node is said first transformer second winding.
Claim 5
Dependent Claim
38 words
The broadband impedance matching device of claim 1 further comprising a third transformer having a magnetic core and a first and a second winding, each winding having a predetermined number of turns and a first and second end.
Claim 6
Dependent Claim
88 words
The broadband impedance matching device of claim 4 wherein: said third transformer first winding first end coupled to said first node and said third transformer first winding second end coupled to an end of a transformer winding which winding has an opposite end coupled to said second node; and said third transformer second winding first end coupled to said second node and said third transformer second winding second end coupled to an end of a transformer winding which winding has an opposite end coupled to said first node.
Claim 7
Dependent Claim
56 words
The broadband impedance matching device of claim 5 wherein said end of a transformer winding which winding has an opposite end coupled to said second node is said first transformer second winding and said end of a transformer winding which winding has an opposite end coupled to said first node is said second transformer first winding.
Claim 8
Dependent Claim
84 words
The broadband impedance matching device of claim 4 wherein: said third transformer first winding first end coupled to said first node and said third transformer first winding second end coupled to said first transformer second winding second end; said third transformer second winding first end coupled to said first transformer second winding first end and said third transformer second winding second end coupled to said fourth node; and said second transformer first winding first end coupled to said first transformer second winding first end.
Claim 9
Dependent Claim
24 words
The broadband impedance matching device according to claim 4 wherein said magnetic core of said first, second and third transformers is a ferrite rod.
Claim 10
Dependent Claim
24 words
The broadband impedance matching device according to claim 4 wherein said magnetic core of said first, second and third transformers is a ferrite toroid.
Claim 11
Dependent Claim
22 words
The broadband impedance matching device according to claim 4 wherein said magnetic core of said first, second and third transformers is common.
Claim 12
Dependent Claim
223 words
A broadband impedance matching device for use in a broadband linear amplifier for coupling a signal having a predetermined frequency bandwidth between a balanced circuit having two signal carrying conductors and an unbalanced circuit having one signal carrying conductor comprising: a first node for coupling with a first balanced circuit signal carrying conductor; a second node for coupling with a second balanced circuit signal carrying conductor; a third node, for coupling with the unbalanced circuit signal carrying conductor; a fourth node for coupling to a ground; a first transformer having a magnetic core and a first and a second winding, each winding having a predetermined number of turns and a first and second end; a second transformer having a magnetic core and a first, a second and a third winding, each winding having a predetermined number of turns and a first and second end; said first transformer first winding first end coupled to said first node and said first transformer first winding second end coupled to said third node; said second transformer second winding first end coupled to said second node and said second transformer second winding second end coupled to said fourth node; and said second transformer third winding is a balance winding having its first end coupled to said fourth node and its said second end coupled to said first node.
Claim 13
Dependent Claim
223 words
A broadband impedance matching device for use in a broadband linear amplifier for coupling a signal having a predetermined frequency bandwidth between a balanced circuit having two signal carrying conductors and an unbalanced circuit having one signal carrying conductor comprising: a first node for coupling with a first balanced circuit signal carrying conductor; a second node for coupling with a second balanced circuit signal carrying conductor; a third node, for coupling with the unbalanced circuit signal carrying conductor; a fourth node for coupling to a ground; a first transformer having a magnetic core and a first and a second winding, each winding having a predetermined number of turns and a first and second end; a second transformer having a magnetic core and a first, a second and a third winding, each winding having a predetermined number of turns and a first and second end; said first transformer first winding first end coupled to said first node and said first transformer first winding second end coupled to said third node; said second transformer second winding first end coupled to said second node and said second transformer second winding second end coupled to said fourth node; and said second transformer third winding is a balance winding having its first end coupled to said fourth node and its said second end coupled to said first node.
Claim 14
Dependent Claim
87 words
The broadband impedance matching device of claim 11 wherein: said first transformer second winding first end coupled to said second node and said first transformer second winding second end coupled to an end of a transformer winding which winding has an opposite end coupled-to said first node; and said second transformer first winding first end coupled to said first node and said second transformer first winding second end coupled to an end of a transformer winding which winding has an opposite end coupled to said second node.
Claim 15
Dependent Claim
56 words
The broadband impedance matching device of claim 12 wherein said end of a transformer winding which winding has an opposite end coupled to said first node is said second transformer first winding and said end of a transformer winding which winding has an opposite end coupled to said second node is said first transformer second winding.
Claim 16
Dependent Claim
38 words
The broadband impedance matching device of claim 11 further comprising a third transformer having a magnetic core and a first and a second winding, each winding having a predetermined number of turns and a first and second end.
Claim 17
Dependent Claim
88 words
The broadband impedance matching device of claim 14 wherein: said third transformer first winding first end coupled to said first node and said third transformer first winding second end coupled to an end of a transformer winding which winding has an opposite end coupled to said second node; and said third transformer second winding first end coupled to said second node and said third transformer second winding second end coupled to an end of a transformer winding which winding has an opposite end coupled to said first node.
Claim 18
Dependent Claim
56 words
The broadband impedance matching device of claim 15 wherein said end of a transformer winding which winding has an opposite end coupled to said second node is said first transformer second winding and said end of a transformer winding which winding has an opposite end coupled to said first node is said second transformer first winding.
Claim 19
Dependent Claim
84 words
The broadband impedance matching device of claim 14 wherein: said third transformer first winding first end coupled to said first node and said third transformer first winding second end coupled to said first transformer second winding second end; said third transformer second winding first end coupled to said first transformer second winding first end and said third transformer second winding second end coupled to said fourth node; and said second transformer first winding first end coupled to said first transformer second winding first end.
Claim 20
Dependent Claim
24 words
The broadband impedance matching device according to claim 14 wherein said magnetic structure of said first, second and third transformers is a ferrite rod.
Claim 21
Dependent Claim
24 words
The broadband impedance matching device according to claim 14 wherein said magnetic structure of said first, second and third transformers is a ferrite toroid.
Claim 22
Dependent Claim
22 words
The broadband impedance matching device according to claim 14 wherein said magnetic structure of said first, second and third transformers is common.
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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) | 2001-06-15 | 2001-12-15 | 2002-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-06-15 | 2005-12-15 | 2006-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-06-15 | 2009-12-15 | 2010-06-16 | $7700.00 | Window Closed / Lapsed |