US3818385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hybrid junction and mixer or modulator
Assignee: Fei Microwave Inc
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Filing: 1972-09-21
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Granted: 1974-06-18
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Expires: 1992-09-21
Abstract
Abstract A double balanced mixer or modulator utilizing a hybrid junction in which the junction port of the isolated arm is equally excited by two arms connected in parallel to the excited input port. The hybrid junction is formed of compensated baluns which according to one embodiment are connected together with a star arrangement of diodes to form a bias/modulation port resulting in a double balanced mixer or modulator.
Inventors
- 👤 R Mouw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:19
CPC Classifications
H; H03; H03D; H03D9/00; H03D9/06; H03D9/0608; H03D9/0633; H03C; H03C1/00; H03C1/52; H03C1/54; H03C1/56; H03C1/58; H03C7/00; H03C7/02; H03C7/025; H03C7/027; H03D2200/00; H03D2200/0001; H03D2200/0011; H03D2200/0015; H03D2200/0023; H03D7/00; H03D7/14; H03D7/1408
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
348 words
In an electromagnetic hybrid junction, first, second, third and fourth baluns, each of said baluns including a first and second ends and further each of said baluns comprising a conductor pair forming transmission lines in which one conductor of said pair is grounded at both said first and second ends and has an open-circuited portion intermediate said first and second ends, said conductor pairs of each of said first, second, third and fourth baluns being open-circuited with respect to each other at said second ends thereof, said balun being formed thereby into a first impedance matching portion and a second compensating portion connected in series with each other and separated by said open-circuited portion, means connecting said first ends of the other conductor of said first and second baluns in parallel to form a first port to the junction, means connecting said first ends of the other conductor of said third and fourth baluns in parallel to form a second port to the junction, means connecting said one conductor of said conductor pair of said first balun at its portion electrically contiguous to its first end to said one conductor of said conductor pair of said third balun at its portion electrically contiguous to its second end, and means connecting said one conductor of said conductor pair of said second balun at its portion electrically contiguous to its second end to said one conductor of said fourth balun at its portion electrically contiguous to its first end whereby terminal pairs are formed defining a third port, means connecting said one conductor of said conductor pair of said second balun at its portion electrically contiguous to its first end to said one conductor of said conductor pair of said third balun at its portion electrically contiguous to its first end and means connecting said one conductor of said terminal pair of said first balun at its portion electrically contiguous to its second end to said one conductor of said fourth balun at its portion electrically contiguous to its second end whereby terminal pairs are formed defining a fourth port.
Claim 2
Dependent Claim
348 words
In an electromagnetic hybrid junction, first, second, third and fourth baluns, each of said baluns including a first and second ends and further each of said baluns comprising a conductor pair forming transmission lines in which one conductor of said pair is grounded at both said first and second ends and has an open-circuited portion intermediate said first and second ends, said conductor pairs of each of said first, second, third and fourth baluns being open-circuited with respect to each other at said second ends thereof, said balun being formed thereby into a first impedance matching portion and a second compensating portion connected in series with each other and separated by said open-circuited portion, means connecting said first ends of the other conductor of said first and second baluns in parallel to form a first port to the junction, means connecting said first ends of the other conductor of said third and fourth baluns in parallel to form a second port to the junction, means connecting said one conductor of said conductor pair of said first balun at its portion electrically contiguous to its first end to said one conductor of said conductor pair of said third balun at its portion electrically contiguous to its second end, and means connecting said one conductor of said conductor pair of said second balun at its portion electrically contiguous to its second end to said one conductor of said fourth balun at its portion electrically contiguous to its first end whereby terminal pairs are formed defining a third port, means connecting said one conductor of said conductor pair of said second balun at its portion electrically contiguous to its first end to said one conductor of said conductor pair of said third balun at its portion electrically contiguous to its first end and means connecting said one conductor of said terminal pair of said first balun at its portion electrically contiguous to its second end to said one conductor of said fourth balun at its portion electrically contiguous to its second end whereby terminal pairs are formed defining a fourth port.
Claim 3
Dependent Claim
47 words
A hybrid junction as in claim 1 wherein each of said baluns comprises transmission line sections each having at least a strip conductor and one ground plane conductor separated by dielectric and wherein said ground plane conductor has an open-circuited portion intermediate its first and second ends.
Claim 4
Dependent Claim
44 words
A hybrid junction as in claim 1 wherein each of said baluns comprises a coaxial wire transmission line section having an inner conductor and a coaxial outer conductor and wherein said coaxial outer conductor has an open-circuited portion intermediate its first and second ends.
Claim 5
Dependent Claim
110 words
A hybrid junction as in claim 1 including a star diode network consisting of at least four diodes connected together in star configuration in which one end of each diode is connected to a common terminal and the other end of each diode is connected to one of the terminals of said third and fourth ports, said diodes being oriented in opposite conduction direction to each other across each of said third and fOurth ports and being further oriented in a conduction direction at the third port which is opposite that of the fourth port, said diodes and hybrid junction together forming a double balanced three port mixer or modulator.
Claim 6
Dependent Claim
110 words
A hybrid junction as in claim 2 including a star diode network consisting of at least four diodes connected together in star configuration in which one end of each diode is connected to a common terminal and the other end of each diode is connected to one of the terminals of said third and fourth ports, said diodes being oriented in opposed conduction direction to each other across each of said third and fourth ports and being further oriented in a conduction direction at the third port which is opposite that of the fourth port, said diodes and hybrid junction together forming a double balanced three port mixer or modulator.
Claim 7
Dependent Claim
41 words
A hybrid junction double balanced mixer or modulator as in claim 5 wherein each of the electrically contiguous portions of said ground plane is approximately one-fourth wave length for signals at the center frequency of the desired frequency band of operation.
Claim 8
Dependent Claim
109 words
A hybrid junction as in claim 3 including a star diode network consisting of at least four diodes connected together in star configuration in which one end of each diode is connected to a common terminal and the other end of each diode is connected to one of the terminals of said third and fourth port, said diode being oriented in opposed conduction direction to eachother across each of said third and fourth ports and being further oriented in a conduction direction at the third port which is opposite that of the fourth port, said diodes and hybrid junctions together forming a double balanced three port mixer or modulator.
Claim 9
Dependent Claim
42 words
A hybrid junction coupled, double balanced mixer or modulator as in claim 7 wherein each of the electrically contiguous portions of said ground planes is approximately one-fourth wave length for signals at the center frequency of the desired frequency band of operation.
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) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |