US4430758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suspended-substrate co-planar stripline mixer
Assignee: SCIENTIFIC COMPONENTS Corp 2625 EAST 14TH STREET BROOKLYN NY 11235 A NY CORP
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Filing: 1982-06-03
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Granted: 1984-02-07
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Expires: 2002-06-03
Abstract
Abstract A coplanar strip line compensated balun coupled to a double balanced strip line mixer circuit where the strip lines of the balun have a predetermined radius of curvature and adjusted gap widths to provide for isolation between input and output and for impedance matching over a broad band input. The curvature is adjusted to produce proper inductance for producing input/output isolation. The spacing of the gap width provides for proper capacitive coupling of the transmitted energy between the strip lines since the entire circuit is separated from a ground plane and printed on a lossless dielectric substrate.
Inventors
- 👤 Richard V. Snyder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:11
CPC Classifications
H; H03; H03D; H03D9/00; H03D9/06; H03D9/0608; H03D9/0633; H03D2200/00; H03D2200/0001; H03D2200/0011; H03D2200/0013; H03D2200/0023; H03D2200/0041; H03D2200/009; H03D7/00; H03D7/14; H03D7/1408
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
159 words
A suspended-substrate coplanar mixer comprising: a strip line compensated balun including a first strip line section having (1) a straight portion and (2) a curved portion forming an inner strip line segment and a second strip line section having (1) a straight portion equidistantly spaced apart from said straight portion of said first strip line section and (2) a curved portion forming an outer strip line segment, the curved portions oppositely curved facing away from each other and each having substantially the same radius of curvature, and a strip line mixer including an integrated diode quad having input means, a strip line output terminal directly coupled to said diode quad, a curved interior strip line segment disposed within, equidistantly spaced from and having a smaller radius of curvature than both of said outer and said inner strip line segments for providing electrical isolation between said balun and said output terminal and capacitively coupling energy between equidistantly spaced strip lines.
Claim 2
Dependent Claim
159 words
A suspended-substrate coplanar mixer comprising: a strip line compensated balun including a first strip line section having (1) a straight portion and (2) a curved portion forming an inner strip line segment and a second strip line section having (1) a straight portion equidistantly spaced apart from said straight portion of said first strip line section and (2) a curved portion forming an outer strip line segment, the curved portions oppositely curved facing away from each other and each having substantially the same radius of curvature, and a strip line mixer including an integrated diode quad having input means, a strip line output terminal directly coupled to said diode quad, a curved interior strip line segment disposed within, equidistantly spaced from and having a smaller radius of curvature than both of said outer and said inner strip line segments for providing electrical isolation between said balun and said output terminal and capacitively coupling energy between equidistantly spaced strip lines.
Claim 3
Dependent Claim
19 words
The mixer of claim 1 in which said first strip line section is adapted to transmit local oscillator signals.
Claim 4
Dependent Claim
14 words
The mixer of claim 2 in which said second strip line section is grounded.
Claim 5
Dependent Claim
30 words
The mixer of claims 2 or 3 in which there is provided means for producing an RF mixer input signal for application to said input means of said diode quad.
Claim 6
Dependent Claim
16 words
The mixer of claim 1 in which the thickness of said substrate is greater than 0.060.
Claim 7
Dependent Claim
14 words
The mixer of claim 5 in which said substrate is a low loss dielectric.
Claim 8
Dependent Claim
26 words
The mixer of claim 4 in which said electrical isolation is a function of the radii of curvature of said inner, outer and interior strip lines.
Claim 9
Dependent Claim
43 words
The mixer of claim 7 in which said capacitive coupling is a function of the distance between said equidistantly spaced strip lines and said mixer provides for broad band impedance matching of energy from said first strip line section to said output terminal.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-02-06 | 1987-08-08 | 1988-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-06 | 1991-08-08 | 1992-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-06 | 1995-08-08 | 1996-02-07 | $7700.00 | Window Closed / Lapsed |