Patent US4940955A successfully refreshed from Google Patents.
US4940955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature compensated stripline structure
Assignee: CTS Corp
•
Filing: 1989-01-03
•
Granted: 1990-07-10
•
Expires: 2009-01-03
Abstract
Abstract A stripline structure has a stabilized resonant frequency against temperature variations. It includes a lower and an upper substrate of ceramic materials, each substrate having opposing inner and outer surfaces. Each of the outer surfaces are covered with a layer of conductive material constituting ground planes. Resonator strips of conductive material are situated on each of the inner surfaces, and each have one end connected to the ground, while the opposite end is an open circuit. The upper and lower substrates are bonded together along the length of their respective resonator strips, thereby producing the stripline structure. The length of the resonator determines the resonant frequency of the stripline structure. The two substrates are made of materials having opposite dielectric temperature coefficient. The physical parameters of the stripline structure, such as, thicknesses of the substrates, the widths of the resonator strips, or both can be adjusted in order to produce a net zero, positive or negative frequency temperature coefficient. Furthermore the substrates can be made of dielectric or ferrite materials.
Inventors
- 👤 Robert J. Higgins, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:06
CPC Classifications
H; H01; H01P; H01P7/00; H01P7/08; H01P7/084; H01P1/00; H01P1/20; H01P1/201; H01P1/203; H01P1/30
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
155 words
A stripline structure, comprising: a first substrate having inner and outer opposed surfaces, and having a first temperature coefficient and a first thickness; a second substrate having inner and outer opposed surfaces, and having a second temperature coefficient and a second thickness; said outer surfaces of first and second substrate each being covered by a conductive material constituting ground planes; at least one resonator device comprising a first conductor having a first width, situated on the inner surface of said first substrate, and a second conductor having a second width, situated on the inner surface of said second substrate; said first and second substrates being constructed and arranged with their respective inner surfaces facing each other and said first and second temperature coefficients having opposite effect on resonant frequency; wherein said first and said second thicknesses of said first and second substrate are selected such as to produce a net temperature coefficient of resonant frequency.
Claim 2
Dependent Claim
155 words
A stripline structure, comprising: a first substrate having inner and outer opposed surfaces, and having a first temperature coefficient and a first thickness; a second substrate having inner and outer opposed surfaces, and having a second temperature coefficient and a second thickness; said outer surfaces of first and second substrate each being covered by a conductive material constituting ground planes; at least one resonator device comprising a first conductor having a first width, situated on the inner surface of said first substrate, and a second conductor having a second width, situated on the inner surface of said second substrate; said first and second substrates being constructed and arranged with their respective inner surfaces facing each other and said first and second temperature coefficients having opposite effect on resonant frequency; wherein said first and said second thicknesses of said first and second substrate are selected such as to produce a net temperature coefficient of resonant frequency.
Claim 3
Dependent Claim
12 words
Stripline structure of claim 1, wherein said net temperature coefficient is zero.
Claim 4
Dependent Claim
12 words
Stripline structure of claim 1, wherein said net temperature coefficient is negative.
Claim 5
Dependent Claim
12 words
Stripline structure of claim 1, wherein said net temperature coefficient is positive.
Claim 6
Dependent Claim
11 words
Stripline structure of claim 1, wherein said substrates comprise dielectric materials.
Claim 7
Dependent Claim
11 words
Stripline structure of claim 1, wherein said substrates comprise ferrite materials.
Claim 8
Dependent Claim
19 words
Stripline structure of claim 1, wherein said first substrate comprise dielectric materials and said second substrate comprise ferrite materials.
Claim 9
Dependent Claim
158 words
A stripline structure, comprising: a first substrate having inner and outer opposed surfaces, and having a first temperature coefficient and a first thickness; a second substrate having inner and outer opposed surfaces, and having a second temperature coefficient and a second thickness; said outer surfaces of first and second substrate each being covered by a conductive material constituting ground planes; at least one resonator device comprising a first conductor having a first width, situated on the inner surface of said first substrate, and a second conductor having a second width, situated on the inner surface of said second substrate; said first and second substrates being constructed and arranged with their respective inner surfaces facing each other and said first and second temperature coefficients having opposite effect on resonant frequency; wherein said first and said second widths of said first and second coductors of said resonator are selected such as to produce a net temperature coefficient of resonant frequency.
Claim 10
Dependent Claim
158 words
A stripline structure, comprising: a first substrate having inner and outer opposed surfaces, and having a first temperature coefficient and a first thickness; a second substrate having inner and outer opposed surfaces, and having a second temperature coefficient and a second thickness; said outer surfaces of first and second substrate each being covered by a conductive material constituting ground planes; at least one resonator device comprising a first conductor having a first width, situated on the inner surface of said first substrate, and a second conductor having a second width, situated on the inner surface of said second substrate; said first and second substrates being constructed and arranged with their respective inner surfaces facing each other and said first and second temperature coefficients having opposite effect on resonant frequency; wherein said first and said second widths of said first and second coductors of said resonator are selected such as to produce a net temperature coefficient of resonant frequency.
Claim 11
Dependent Claim
12 words
Stripline structure of claim 8, wherein said net temperature coefficient is zero.
Claim 12
Dependent Claim
12 words
Stripline structure of claim 8, wherein said net temperature coefficient is negative.
Claim 13
Dependent Claim
12 words
Stripline structure of claim 8, wherein said net temperature coefficient is positive.
Claim 14
Dependent Claim
11 words
Stripline structure of claim 8, wherein said substrate comprise dielectric materials.
Claim 15
Dependent Claim
11 words
Stripline structure of claim 8, wherein said substrates comprise ferrite materials.
Claim 16
Dependent Claim
19 words
Stripline structure of claim 8, wherein said first substrate comprise dielectric materials and said second substrate comprise ferrite materials.
Claim 17
Dependent Claim
173 words
A stripline structure, comprising: a first substrate having inner and outer opposed surfaces, and having a first temperature coefficient and a first thickness; a second substrate having inner and outer opposed surfaces; and having a second temperature coefficient and a second thickness; said outer surfaces of first and second substrate each being covered by a conductive material constituting ground planes; at least one resonator device comprising a first conductor having a first width, situated on the inner surface of said first substrate, and a second conductor having a second width, situated on the inner surface of said second substrate; said first and second substrates being constructed and arranged with their respective inner surfaces facing each other and said first and second temperature coefficients having opposite effect on resonant frequency; wherein combination of said first and said second thicknesses of said first and second substrate, and said first and said second widths of said first and second conductors of said resonator are selected such as to produce a net temperature coefficient of resonant frequency.
Claim 18
Dependent Claim
173 words
A stripline structure, comprising: a first substrate having inner and outer opposed surfaces, and having a first temperature coefficient and a first thickness; a second substrate having inner and outer opposed surfaces; and having a second temperature coefficient and a second thickness; said outer surfaces of first and second substrate each being covered by a conductive material constituting ground planes; at least one resonator device comprising a first conductor having a first width, situated on the inner surface of said first substrate, and a second conductor having a second width, situated on the inner surface of said second substrate; said first and second substrates being constructed and arranged with their respective inner surfaces facing each other and said first and second temperature coefficients having opposite effect on resonant frequency; wherein combination of said first and said second thicknesses of said first and second substrate, and said first and said second widths of said first and second conductors of said resonator are selected such as to produce a net temperature coefficient of resonant frequency.
Claim 19
Dependent Claim
12 words
Stripline structure of claim 15, wherein said net temperature coefficient is zero.
Claim 20
Dependent Claim
12 words
Stripline structure of claim 15, wherein said net temperature coefficient is negative.
Claim 21
Dependent Claim
12 words
Stripline structure of claim 15, wherein said net temperature coefficient is positive.
Claim 22
Dependent Claim
11 words
Stripline structure of claim 15, wherein said substrates comprise dielectric materials.
Claim 23
Dependent Claim
11 words
Stripline structure of claim 15, wherein said substrates comprise ferrite materials.
Claim 24
Dependent Claim
19 words
Stripline structure of claim 15, wherein said first substrate comprise dielectric materials and said second substrate comprise ferrite materials.
References Cited (Backward Citations)
US3534301A
Cited
US3798578A
Cited
US3840828A
Cited
US4218664A
Cited
US4661790A
Cited
US4580116A
Cited
US4609892A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-07-09 | 1994-01-08 | 1994-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-09 | 1998-01-08 | 1998-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-09 | 2002-01-08 | 2002-07-10 | $7700.00 | Window Closed / Lapsed |