US3662261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic frequency meter
Assignee: EIP LABS
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Filing: 1969-06-03
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Granted: 1972-05-09
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Expires: 1989-06-03
Abstract
Abstract An automatic frequency meter is disclosed including a resonant frequency structure coupled to a transmission line with the frequency of the resonant structure continuously swept and change in level of the signal on the transmission line detected for a determination of the resonant frequency of the structure and therefore the frequency of the signal. The resonant frequency structure can be YIG coupled to the transmission line in an absorbtion mode. The YIG can be coupled to the line by positioning adjacent a slot in the center conductor with the slot aligned parallel to the magnetic field for coupling to the 210 mode or perpendicular to the magnetic field for coupling to the 110 mode of the YIG.
Inventors
- 👤 Roy R Barthold
- 👤 William J Keane
- 👤 Lawrence F Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:13
CPC Classifications
H; H03; H03J; H03J7/00; H03J7/18; H03J7/32; G; G01; G01R; G01R23/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
144 words
An automatic frequency meter comprising: a transmission line for carrying a signal to be measured, a sphere of yttrium-iron-garnet having resonant frequency, means for continuously sweeping the resonant frequency of said sphere across a band of frequencies, a coaxial conductor coupling means for coupling said sphere to said transmission line and having a center conductor with a slot therein, means for positioning said sphere adjacent said slot in said center conductor, said sweeping means including means applying a changing magnetic field perpendicular to the axis of said center conductor, means for detecting a change in the level of the signal from said transmission line, means for determining the resonant frequency of said structure from the sweeping means with a detected change in said output signal, and means for indicating the frequency of the input signal corresponding to the determined resonant frequency of said structure.
Claim 2
Dependent Claim
144 words
An automatic frequency meter comprising: a transmission line for carrying a signal to be measured, a sphere of yttrium-iron-garnet having resonant frequency, means for continuously sweeping the resonant frequency of said sphere across a band of frequencies, a coaxial conductor coupling means for coupling said sphere to said transmission line and having a center conductor with a slot therein, means for positioning said sphere adjacent said slot in said center conductor, said sweeping means including means applying a changing magnetic field perpendicular to the axis of said center conductor, means for detecting a change in the level of the signal from said transmission line, means for determining the resonant frequency of said structure from the sweeping means with a detected change in said output signal, and means for indicating the frequency of the input signal corresponding to the determined resonant frequency of said structure.
Claim 3
Dependent Claim
37 words
The frequency meter of claim 1 wherein said slot of said center conductor is aligned with the major axis thereof parallel to the direction of said magnetic field for coupling to the 210 mode of said yttrium-iron-garnet.
Claim 4
Dependent Claim
37 words
The frequency meter of claim 1 wherein said slot of said center conductor is aligned with the major axis thereof perpendicular to the direction of said magnetic field for coupling to the 110 mode of said yttrium-iron-garnet.
Claim 5
Dependent Claim
214 words
An automatic frequency meter comprising: a coaxial transmission line for carrying the signal to be measured; yttrium-iron-garnet material, means for applying a continuously sweeping magnetic field to said material for sweeping the resonant frequency of said material across a bond of frequencies containing the signal frequency, means for coupling said material to said coaxial line for absorption of signal energy by said material from said line when the resonant frequency of said material is swept past the frequency of the signal, means for detecting the signal conducted on said line past said coupling means, logarithmic amplifiEr means for amplifying the detected signal, means for detecting occurrence of the maximum change of the signal on said line due to absorption by said material, means for determining from the sweeping means the resonant frequency of said material at occurrence of said maximum change, means for indicating the frequency of the signal corresponding to the determined resonant frequency of said structure, said magnetic field being directed perpendicular to the center conductor of said coaxial line, said coupling means including a slot in the center conductor of said coaxial line aligned parallel with the direction of said magnetic field, and means for positioning said structure adjacent to said slot for coupling to the 210 mode of said structure.
Claim 6
Dependent Claim
214 words
An automatic frequency meter comprising: a coaxial transmission line for carrying the signal to be measured; yttrium-iron-garnet material, means for applying a continuously sweeping magnetic field to said material for sweeping the resonant frequency of said material across a bond of frequencies containing the signal frequency, means for coupling said material to said coaxial line for absorption of signal energy by said material from said line when the resonant frequency of said material is swept past the frequency of the signal, means for detecting the signal conducted on said line past said coupling means, logarithmic amplifiEr means for amplifying the detected signal, means for detecting occurrence of the maximum change of the signal on said line due to absorption by said material, means for determining from the sweeping means the resonant frequency of said material at occurrence of said maximum change, means for indicating the frequency of the signal corresponding to the determined resonant frequency of said structure, said magnetic field being directed perpendicular to the center conductor of said coaxial line, said coupling means including a slot in the center conductor of said coaxial line aligned parallel with the direction of said magnetic field, and means for positioning said structure adjacent to said slot for coupling to the 210 mode of said structure.
Claim 7
Dependent Claim
213 words
An automatic frequency meter comprising: a coaxial transmission line for carrying the signal to be measured, yttrium-iron-garnet material, means for applying a continuously sweeping magnetic field to said material for sweeping the resonant frequency of said material across a band of frequencies containing the signal frequency, means for coupling said material to said coaxial line for absorption of signal energy by said material from said line when the resonant frequency of said material is swept past the frequency of the signal, means for detecting the signal conducted on said line past said coupling means, logarithmic amplifier means for amplifying the detected signal, means for detecting occurrence of the maximum change of the signal on said line due to absorption by said material, means for determining from the sweeping means the resonant frequency of said material at occurrence of said maximum change, means for indicating the frequency of the signal corresponding to the determined resonant frequency of said structure, said magnetic field being directed perpendicular to the center conductor of said coaxial line, said coupling means including a slot in the center conductor of said coaxial line aligned perpendicular to the direction of said magnetic field, and means for positioning said structure adjacent said slot for coupling to the 110 mode of said structure.
Claim 8
Dependent Claim
213 words
An automatic frequency meter comprising: a coaxial transmission line for carrying the signal to be measured, yttrium-iron-garnet material, means for applying a continuously sweeping magnetic field to said material for sweeping the resonant frequency of said material across a band of frequencies containing the signal frequency, means for coupling said material to said coaxial line for absorption of signal energy by said material from said line when the resonant frequency of said material is swept past the frequency of the signal, means for detecting the signal conducted on said line past said coupling means, logarithmic amplifier means for amplifying the detected signal, means for detecting occurrence of the maximum change of the signal on said line due to absorption by said material, means for determining from the sweeping means the resonant frequency of said material at occurrence of said maximum change, means for indicating the frequency of the signal corresponding to the determined resonant frequency of said structure, said magnetic field being directed perpendicular to the center conductor of said coaxial line, said coupling means including a slot in the center conductor of said coaxial line aligned perpendicular to the direction of said magnetic field, and means for positioning said structure adjacent said slot for coupling to the 110 mode of said structure.
References Cited (Backward Citations)
US3374436A
Cited
US3541444A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |