US4023123A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microstrip reverse-phased hybrid ring coupler
Assignee: United States Department of the Navy
•
Filing: 1975-02-03
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Granted: 1977-05-10
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Expires: 1995-02-03
Abstract
Abstract A microstrip hybrid directional coupler in which the 180° phase sh is effectuated by a twisted pair of parallel conductors.
Inventors
- 👤 John Reindel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:51
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/12; H01P5/16; H01P5/19; H01P5/22; H01P5/225
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
96 words
A microwave directional coupler comprising: a dielectric material having first and second sides; a plurality of interconnected electrical conductors each of a predetermined electrical length fixed to said first side of said dielectric material; a ground plane conductor fixed to said second side of said dielectric material; a phase reversal transmission line connected to two of said plurality of electrical conductors comprising first and second adjacent, substantially parallel conductors each having first and second sides and each being twisted 180° whereby said phase reversal transmission line introduces a 180° phase reversal to microwave signals propagating therethrough.
Claim 2
Dependent Claim
96 words
A microwave directional coupler comprising: a dielectric material having first and second sides; a plurality of interconnected electrical conductors each of a predetermined electrical length fixed to said first side of said dielectric material; a ground plane conductor fixed to said second side of said dielectric material; a phase reversal transmission line connected to two of said plurality of electrical conductors comprising first and second adjacent, substantially parallel conductors each having first and second sides and each being twisted 180° whereby said phase reversal transmission line introduces a 180° phase reversal to microwave signals propagating therethrough.
Claim 3
Dependent Claim
37 words
The directional coupler of claim 1 wherein said first and second conductors are oriented such that said first side of said first conductor faces said first side of said second conductor throughout the lengths of said conductors.
Claim 4
Dependent Claim
26 words
The directional coupler of claim 2 wherein the distance between said first and second conductors is constant throughout the lengths of said first and second conductors.
Claim 5
Dependent Claim
17 words
The directional coupler of claim 3 wherein said first and second conductors are of equal electrical lengths.
Claim 6
Dependent Claim
24 words
The directional coupler of claims 2 wherein one end of each of said first and second conductors is connected to said ground plane conductor.
Claim 7
Dependent Claim
18 words
The directional coupler of claim 5 wherein said plurality of interconnected electrical conductors is three interconnected electrical conductors.
Claim 8
Dependent Claim
24 words
The directional coupler of claim 6 wherein each of said three electrical conductors and said phase reversal electrical conductor are of equal electrical lengths.
Claim 9
Dependent Claim
26 words
The directional coupler of claim 7 wherein said equal electrical lengths are λ/4 where λ is the wavelength at the middle of the operational frequency band.
Claim 10
Dependent Claim
44 words
The directional coupler of claim 5 including a port connected to the junction of each of said plurality of electrical conductors and a port connected to the junction of each of said two of said plurality of electrical conductors with said phase reversal conductor.
Claim 11
Dependent Claim
39 words
The directional coupler of claim 9 wherein each of said plurality of electrical conductors and said phase reversal conductor are of equal electrical length of λ/4 where λ is the wavelength at the middle of the operational frequency band.
Claim 12
Dependent Claim
18 words
The directional coupler of claim 10 wherein said plurality of interconnected electrical conductors is three interconnected electrical conductors.
Claim 13
Dependent Claim
16 words
The directional coupler of claim 11 wherein said first and second conductors are of equal width.
Claim 14
Dependent Claim
17 words
The directional coupler of claim 12 wherein said first and second conductors are of equal electrical lengths.
Claim 15
Dependent Claim
20 words
The directional coupler of claim 13 wherein said first and second conductors extend through an aperture in said dielectric material.
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) | 1980-05-09 | 1980-11-08 | 1981-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-09 | 1984-11-08 | 1985-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-09 | 1988-11-08 | 1989-05-10 | $7700.00 | Window Closed / Lapsed |