US3757334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized communication and control system
Assignee: International Business Machines Corp
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Filing: 1968-02-29
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Granted: 1973-09-04
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Expires: 1988-02-29
Abstract
Abstract The disclosure provides a stabilized retrodirective oscillating loop or link for a channel of a communication and control system incorporating a pair of remotely located retrodirective antenna array terminals wherein the mechanical and electrical design parameters of the terminals and the circuits thereat contribute to frequency stabilization of the loop. Translational and rotational motions of the retrodirective terminals introduce frequency shifts into the communication channel between the pair of remotely located terminals. Doppler frequency shifts and local oscillator shifts are compensated by the electronic circuitry which stabilizes the retrodirective oscillating loop of the communication and control channel through voltage control of at least one local oscillator in each oscillating loop. The design of the retrodirective terminal separates the receive and transmit antenna elements from each other by placing them on separate spatial surfaces with identical geometrical shapes. Preferably, the two geometrical shapes are scaled in size in a ratio as the oscillation wavelengths being received and transmitted. The surfaces are rigidly interconnected by a communicating tubular member. The system permits high amplification and independent signal modulation in both directions between the antenna arrays at the remotely located terminals of the loop.
Inventors
- 👤 H Raabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:55
CPC Classifications
H; H01; H01Q; H01Q15/00; H01Q21/00; H01Q21/06; H01Q21/20; H01Q3/00; H01Q3/26; H01Q3/30; H01Q3/34; H01Q3/42; H01Q3/44; H01Q3/46; H04; H04B; H04B7/00
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
97 words
A system for transferring radiant wavefront energy comprising: first and second antenna means spaced from each other and respectively adapted to receive radiant wavefront energy of one phase and to transmit phase inverted radiant wavefront energy, said first and second antenna means having respective geometrically similar deviated surface configurations relative to said wavefronts of said radiant energies; and means for electrically isolating said first and second antenna means from each other comprising a structural member rigidly interconnecting and maintaining in fixed spacial relationship said respective geometrically similar deviated surface configurations of said first and second antenna means.
Claim 2
Independent Claim
97 words
A system for transferring radiant wavefront energy comprising: first and second antenna means spaced from each other and respectively adapted to receive radiant wavefront energy of one phase and to transmit phase inverted radiant wavefront energy, said first and second antenna means having respective geometrically similar deviated surface configurations relative to said wavefronts of said radiant energies; and means for electrically isolating said first and second antenna means from each other comprising a structural member rigidly interconnecting and maintaining in fixed spacial relationship said respective geometrically similar deviated surface configurations of said first and second antenna means.
Claim 3
Dependent Claim
20 words
A system for transferring radiant energy as set forth in claim 1 wherein said structural member is a hollow member.
Claim 4
Dependent Claim
27 words
A syStem as set forth in claim 2 wherein said hollow member contains electrical circuitry for electrically interconnecting said first and second antenna means with each other.
Claim 5
Independent Claim
82 words
A system for transferring radiant wavefront energy comprising: first and second remotely located retrodirective terminals defining a retrodirective oscillating loop having a carrier oscillation frequency for transferring radiant wavefront energy between said terminals; voltage controllable oscillator means located at one of said terminals defining said carrier oscillation frequency; and means controlling said oscillator means for stabilizing said carrier oscillation frequency against both Doppler frequency shift due to relative motion of said terminals and frequency drift of said carrier oscillation frequency defining meanS.
Claim 6
Independent Claim
82 words
A system for transferring radiant wavefront energy comprising: first and second remotely located retrodirective terminals defining a retrodirective oscillating loop having a carrier oscillation frequency for transferring radiant wavefront energy between said terminals; voltage controllable oscillator means located at one of said terminals defining said carrier oscillation frequency; and means controlling said oscillator means for stabilizing said carrier oscillation frequency against both Doppler frequency shift due to relative motion of said terminals and frequency drift of said carrier oscillation frequency defining meanS.
Claim 7
Dependent Claim
38 words
A system for transferring radiant wavefront energy as set forth in claim 4 wherein there is included means for shifting a transmitted frequency of radiant energy into the negative spectrum relative to a received frequency of radiant energy.
Claim 8
Dependent Claim
28 words
A system for transferring radiant energy as set forth in claim 5 wherein the magnitude of the transmitted frequency is different than the magnitude of the received frequency.
Claim 9
Dependent Claim
43 words
A system as set forth in claim 5 wherein said received radiant energy frequency is partially defined by one of two side bands of a carrier oscillation and said transmitted frequency is partially defined by said other side band of said carrier oscillation.
Claim 10
Dependent Claim
24 words
A system as set forth in claim 4 which includes a frequency discriminator monitoring said local oscillator frequency to stabilize received and transmitted frequencies.
Claim 11
Independent Claim
86 words
A system for transferring radiant wavefront energy comprising: retrodirective antenna means each adapted to receive radiant wavefront energy of a first carrier oscillation frequency and to transmit phase inverted radiant wavefront energy of a second carrier oscillation frequency; means for providing an electrical waveform frequency for determining said received and transmitted radiant wavefront energy frequencies; and means for stabilizing said received and transmitted frequencies against both Doppler frequency shift of said received and transmitted frequencies and drift of said means for providing an electrical waveform frequency.
Claim 12
Independent Claim
86 words
A system for transferring radiant wavefront energy comprising: retrodirective antenna means each adapted to receive radiant wavefront energy of a first carrier oscillation frequency and to transmit phase inverted radiant wavefront energy of a second carrier oscillation frequency; means for providing an electrical waveform frequency for determining said received and transmitted radiant wavefront energy frequencies; and means for stabilizing said received and transmitted frequencies against both Doppler frequency shift of said received and transmitted frequencies and drift of said means for providing an electrical waveform frequency.
Claim 13
Dependent Claim
25 words
A system for transferring radiant wavefront energy in accordance with claim 9 wherein said means for providing an electrical waveform frequency comprises a local oscillator.
Claim 14
Dependent Claim
38 words
A system for transferring radiant wavefront energy as set forth in claim 9 wherein there is included means for shifting said transmitted frequency of radiant energy into the negative spectrum relative to said received frequency of radiant energy.
Claim 15
Dependent Claim
28 words
A system for transferring radiant energy as set forth in claim 11 wherein the magnitude of the transmitted frequency is different than the magnitude of the received frequency.
Claim 16
Dependent Claim
48 words
A system for transferring radiant energy as set forth in claim 11 wherein said received radiant energy frequency is partially defined by one of two possible side bands of a carrier oscillation and said transmitted frequency is partially defined by said other side band of said carrier oscillation.
Claim 17
Dependent Claim
29 words
A system for transferring radiant energy as set forth in claim 10 which includes a frequency discriminator monitoring said local oscillator frequency to stabilize said received and transmitted frequencies.
Claim 18
Dependent Claim
92 words
A system for transferring radiant wavefront energy as set forth in claim 9 wherein said means for stabilizing said received and transmitted wavefront energies comprises: a voltage controlled oscillator providing a first electrical waveform frequency; means for mixing said first frequency with said received frequency to provide a second local electrical waveform frequency; frequency discriminator means for monitoring said second local frequency to provide a voltage related thereto and being connected to said voltage controlled osciLlator; and means for mixing said second frequency with said first frequency to provide said transmitted frequency.
Claim 19
Dependent Claim
111 words
In a retrodirective oscillating loop: first and second remotely located retrodirective antenna terminals disposed within the field of view of each other for transferring radiant wavefront energy between said terminals; first and second antenna meanS at one of said retrodirective antenna terminals having respective geometrically similar deviated surfaces for receiving and transmitting respectively said radiant wavefront energies; means located at one of said terminals for providing an electrical waveform frequency for determining said received and transmitted radiant wavefront energy frequencies; and means for stabilizing said received and transmitted frequencies against both Doppler frequency shift of said received and transmitted frequencies and drift of said means for providing an electrical waveform frequency.
Claim 20
Dependent Claim
111 words
In a retrodirective oscillating loop: first and second remotely located retrodirective antenna terminals disposed within the field of view of each other for transferring radiant wavefront energy between said terminals; first and second antenna meanS at one of said retrodirective antenna terminals having respective geometrically similar deviated surfaces for receiving and transmitting respectively said radiant wavefront energies; means located at one of said terminals for providing an electrical waveform frequency for determining said received and transmitted radiant wavefront energy frequencies; and means for stabilizing said received and transmitted frequencies against both Doppler frequency shift of said received and transmitted frequencies and drift of said means for providing an electrical waveform frequency.
Claim 21
Dependent Claim
29 words
The combination of claim 16 wherein said second antenna means transmits radiant wavefront energy in automatic fixed correspondence with the radiant wavefront energy received by said first antenna means.
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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |