Patent US3617877A successfully refreshed from Google Patents.
US3617877A
Expired / Lapsed
US
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Coaxial line measurement device having metal strip filter
Assignee: United States Department of the Navy
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Filing: 1969-07-01
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Granted: 1971-11-02
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Expires: 1989-07-01
Abstract
Abstract A coaxial line measurement device having a step function generator connected to the input of a coaxial line to be tested. The output of the coaxial line is connected to a sinusoid impedance anomoly device having a metal strip that has a physical configuration corresponding to the signal to be filtered. The step function signal is filtered and then the filtered signal is reflected back through the coaxial line and is compared to a signal from the step function generator that has been filtered and reflected by the sinusoid impedance anomoly device when the coaxial line is removed. The difference in the compared signals indicates the attenuation by the coaxial line under test. The device may be also used to measure the characteristics of antennas.
Inventors
- 👤 Charles A Hobson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:06
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/08; G01R31/11
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
102 words
A measurement device comprising: a. first means for generating an electrical signal having a plurality of frequencies; b. second means for applying said signal to the input of a device to be tested; c. a metal strip having a physical configuration and dimensions for passing only that frequency of said electrical signal that coincides with the physical configuration and dimensions of said strip; d. said metal strip for being connected to the output of said device to pass only one frequency of said electrical signal; and e. third means operatively connected to the input of said device for observing said electrical signal.
Claim 2
Dependent Claim
102 words
A measurement device comprising: a. first means for generating an electrical signal having a plurality of frequencies; b. second means for applying said signal to the input of a device to be tested; c. a metal strip having a physical configuration and dimensions for passing only that frequency of said electrical signal that coincides with the physical configuration and dimensions of said strip; d. said metal strip for being connected to the output of said device to pass only one frequency of said electrical signal; and e. third means operatively connected to the input of said device for observing said electrical signal.
Claim 3
Dependent Claim
53 words
The device of claim 1 wherein: a. said first means is a step function generator; and b. said device to be tested comprises an antenna having its input operatively connected to the output of said step function generator, to the input of said metal strip and to the input of said third means.
Claim 4
Dependent Claim
57 words
The device of claim 1 wherein: a. said first means is a step function generator; b. said device to be tested comprises a coaxial line having its input connected to the output of said step function generator and to the input of said third means, and having its output connected to the input of said metal strip.
Claim 5
Dependent Claim
36 words
The device of claim 3 wherein: a. the output of said metal strip is connected to a device for selectively shorting or opening said coaxial line or for providing a preselected impedance across said coaxial line.
Claim 6
Dependent Claim
29 words
The device of claim 1 wherein: a. said metal strip has a sine wave configuration where the distance between the peaks of said sine wave is about 1 inch.
Claim 7
Dependent Claim
56 words
The device of claim 1 wherein: a. two dielectric sheets; b. said metal strip comprises a thin metal sheet positioned between two dielectric sheets and said metal strip positioned on the outside surface of one of said dielectric sheets; and c. said outer conductor of said coaxial line being operatively connected to said thin metal sheet.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |