US3735256A
Expired / Lapsed
US
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Signal spectrum analyzer
Assignee: Raytheon Co
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Filing: 1971-08-26
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Granted: 1973-05-22
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Expires: 1991-08-26
Abstract
Abstract A radio frequency signal spectrum analyzer, suitable for fabrication on a single substrate and adapted to provide a substantially instantaneous indication of the frequency of a signal is disclosed. The spectrum analyzer includes a two dimensional constrained electromagnetic lens system having each one of its input ports coupled to the signal source through an electrical path of different predetermined electrical lengths. The energy of the signal passes through each one of the electrical paths to each one of the input ports and then is focused by the lens system to particular output ports of such antenna in accordance with the frequency of the signal. The frequency of the signal is determined by measuring the energy level in the various output ports of the lens system.
Inventors
- 👤 D Archer
- 👤 R Prickett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:03
CPC Classifications
G; G01; G01R; G01R23/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
80 words
A spectrum analyzer for determining the frequency spectrum of a radio frequency signal, comprising: a. means for coupling the radio frequency signal to each one of a plurality of input ports through paths of different electrical lengths; b. means focusing the signal at each one of the input ports on at least one of a plurality of output ports; and c. means, coupled to the plurality of output ports, for determining which thereof is energized by the signal focused thereon.
Claim 2
Dependent Claim
80 words
A spectrum analyzer for determining the frequency spectrum of a radio frequency signal, comprising: a. means for coupling the radio frequency signal to each one of a plurality of input ports through paths of different electrical lengths; b. means focusing the signal at each one of the input ports on at least one of a plurality of output ports; and c. means, coupled to the plurality of output ports, for determining which thereof is energized by the signal focused thereon.
Claim 3
Dependent Claim
17 words
The spectrum analyzer recited in claim 1 wherein the focusing means includes a two dimensional constrained lens.
Claim 4
Dependent Claim
22 words
The spectrum analyzer recited in claim 1 including a substrate, such substrate having formed thereon the coupling means and the focusing means.
Claim 5
Dependent Claim
17 words
The spectrum analyzer recited in claim 3 wherein the focusing means includes a two dimensional constrained lens.
Claim 6
Dependent Claim
121 words
A spectrum analyzer, comprising: a. means for coupling the analyzer to a source of radio frequency energy; b. a plurality of input ports; c. means for coupling the source to each one of the plurality of input ports, through paths of different electrical lengths; d. means, coupled to the plurality of input ports, for focusing the energy of the signals at each one of the plurality of input ports to at least one of a plurality of output ports, such focusing being in accordance with the relative phase between the signals at successive ones of the plurality of input ports; and e. means, coupled to the plurality of output ports, for determining which thereof is energized by the signal focused thereon.
Claim 7
Dependent Claim
121 words
A spectrum analyzer, comprising: a. means for coupling the analyzer to a source of radio frequency energy; b. a plurality of input ports; c. means for coupling the source to each one of the plurality of input ports, through paths of different electrical lengths; d. means, coupled to the plurality of input ports, for focusing the energy of the signals at each one of the plurality of input ports to at least one of a plurality of output ports, such focusing being in accordance with the relative phase between the signals at successive ones of the plurality of input ports; and e. means, coupled to the plurality of output ports, for determining which thereof is energized by the signal focused thereon.
Claim 8
Dependent Claim
17 words
The spectrum analyzer recited in claim 5 wherein the coupling means includes a plurality of transmission lines.
Claim 9
Dependent Claim
27 words
The spectrum analyzer recited in claim 5 including a substrate, such substrate having formed thereon the plurality of input ports, the coupling means and the focusing means.
Claim 10
Dependent Claim
39 words
The spectrum analyzer recited in claim 7 wherein the adjusting means includes a microstrip line, such microstrip line having a plurality of directional couplers, each one thereof being coupled to a different one of the plurality of input ports.
Claim 11
Dependent Claim
149 words
A spectrum analyzer operative over the frequency range f1 to f2, comprising: a. means for coupling the analyzer to a source of radio frequency energy; b. a plurality of input ports; c. means for coupliNg the source to each one of the plurality of input ports, through paths of different electrical lengths, the electrical length differing between successive ones of the plurality of input ports by an integral multiple of a wavelength lambda o, where lambda o is the wavelength of a signal having a frequency f1 + f2/2; d. means for focusing the signals at each one of the input ports to at least one of a plurality of output ports in accordance with the relative phase between the signals at successive ones of such input ports; and e. means, coupled to the plurality of output ports, for determining which thereof is energized by the signal focused thereon.
Claim 12
Dependent Claim
149 words
A spectrum analyzer operative over the frequency range f1 to f2, comprising: a. means for coupling the analyzer to a source of radio frequency energy; b. a plurality of input ports; c. means for coupliNg the source to each one of the plurality of input ports, through paths of different electrical lengths, the electrical length differing between successive ones of the plurality of input ports by an integral multiple of a wavelength lambda o, where lambda o is the wavelength of a signal having a frequency f1 + f2/2; d. means for focusing the signals at each one of the input ports to at least one of a plurality of output ports in accordance with the relative phase between the signals at successive ones of such input ports; and e. means, coupled to the plurality of output ports, for determining which thereof is energized by the signal focused thereon.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |