Patent US3845387A successfully refreshed from Google Patents.
US3845387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-reactive electromagnetic sensor
Assignee: United States Department of the Army
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Filing: 1973-08-27
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Granted: 1974-10-29
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Expires: 1993-08-27
Abstract
Abstract The sensor consists of a rhombic plate having its larger diagonal aligned with the direction of propagation of the electromagnetic wave. This plate is spaced from a transmission line plate and has connections at the ends of its length through the transmission line plate to two readout devices. Readout devices consists of RC integrators connected to an oscillator.
Inventors
- 👤 L Humphrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:48
CPC Classifications
G; G01; G01R; G01R27/00; G01R27/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
174 words
In a system for measuring field strengths of incident and reflected waveforms from a signal being propagated through a transmission line which contains at least one plate; the improvement comprising a sensor having length and width dimensions; first and second supporting means connected to opposite sides of the length dimension of said sensor so as to support said sensor in spaced relationship above one plate of the transmission line; said first and second supporting means supporting said sensor such that its length dimension is in parallel with the propaation direction of the signal; said sensor having a configuration of a rhombic plate bent at its smaller diagonal so as to provide a constant characteristic impedance for its entire length above said one plate of the transmission line; first and second terminal means located on the opposite side of said one plate from said sensor; and said first and second supporting means also serving to connect the ends of said sensor through said one plate of the transmission line to said first and second terminals.
Claim 2
Dependent Claim
174 words
In a system for measuring field strengths of incident and reflected waveforms from a signal being propagated through a transmission line which contains at least one plate; the improvement comprising a sensor having length and width dimensions; first and second supporting means connected to opposite sides of the length dimension of said sensor so as to support said sensor in spaced relationship above one plate of the transmission line; said first and second supporting means supporting said sensor such that its length dimension is in parallel with the propaation direction of the signal; said sensor having a configuration of a rhombic plate bent at its smaller diagonal so as to provide a constant characteristic impedance for its entire length above said one plate of the transmission line; first and second terminal means located on the opposite side of said one plate from said sensor; and said first and second supporting means also serving to connect the ends of said sensor through said one plate of the transmission line to said first and second terminals.
Claim 3
Dependent Claim
50 words
A system as set forth in claim 1 further comprising first and second insulators mounted in said transmission line plate such that said first and second supporting means may provide connections through the transmission line plate to said first and second terminals without making contact to said transmission line plate.
Claim 4
Dependent Claim
35 words
A system as set forth in claim 2 further comprising first and second detecting means each having an input and an output connected respectively between said first and second terminals and said transmission line plate.
Claim 5
Dependent Claim
54 words
A system as set forth in claim 3 wherein said first and second detector means comprises first and second integrators having outputs and inputs connected respectively across said first and second terminals and said transmission line plate; and first and second oscilloscopes having inputs connected respectively to outputs of said first and second integrators.
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) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |