US3601701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bi-phase keyed modulator-demodulator system
Assignee: Collins Radio Co
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Filing: 1969-09-25
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Granted: 1971-08-24
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Expires: 1989-09-25
Abstract
Abstract At the transmitter, a first switching means connects first symmetric ports of an E plane T junction and an H plane T junction together and a second switching means connects the other symmetric ports of the two T junctions together. Modulating means operates the two switches in an alternate manner so that an input signal supplied to the collinear port of one T junction will have either a 0* or a 180* phase shift at the collinear port of the other output T junction, depending upon which switching means is conductive. At the receiver a hybrid T junction is provided with the output signal of said output T junction being supplied to one symmetric port thereof and a constant phase reference signal to the other symmetric port. An output signal will appear either at the H port or the E port of the hybrid T junction depending upon the phase of the received signal.
Inventors
- 👤 Robert F Salmon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:22
CPC Classifications
H; H04; H04L; H04L27/00; H04L27/18; H04L27/20; H04L27/2032; H04L27/2053; H04L27/206; H04L27/2064; H04L27/22; H04L27/227; H04L27/2275
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
272 words
A data encoding system comprising modulator means and demodulator means comprising: a first H plane T junction having first and second symmetric ports and a collinear port; means for supplying an input carrier signal into said collinear port; and a first E plane T junction means having first and second symmetric ports and a collinear port; first switching means constructed to respond to a control signal to connect or to disconnect the first symmetric port of said H plane T junction to the first symmetric port of said E plane T junction; second switching means constructed to respond to a control signal to connect or to disconnect said second symmetric port of said H plane T junction to said second symmetric port of said E plane T junction; means for generating and supplying to said first and second switching means a control signal having at least a first state and a second state to cause each of said first and second and switching means to become conductive in response to said first and second states, respectively, of said control signal; demodulator means including further T junction means comprising first and second symmetric input ports and at least one output port; means for supplying the signal output from said collinear port of said E plane T junction to said first symmetric input port of said further T junction means of said demodulator means; and means for generating and supplying a reference signal, which is phase locked to one of the output signals from said collinear port of said first H plane T junction, to said second symmetric port of said further T junction.
Claim 2
Dependent Claim
272 words
A data encoding system comprising modulator means and demodulator means comprising: a first H plane T junction having first and second symmetric ports and a collinear port; means for supplying an input carrier signal into said collinear port; and a first E plane T junction means having first and second symmetric ports and a collinear port; first switching means constructed to respond to a control signal to connect or to disconnect the first symmetric port of said H plane T junction to the first symmetric port of said E plane T junction; second switching means constructed to respond to a control signal to connect or to disconnect said second symmetric port of said H plane T junction to said second symmetric port of said E plane T junction; means for generating and supplying to said first and second switching means a control signal having at least a first state and a second state to cause each of said first and second and switching means to become conductive in response to said first and second states, respectively, of said control signal; demodulator means including further T junction means comprising first and second symmetric input ports and at least one output port; means for supplying the signal output from said collinear port of said E plane T junction to said first symmetric input port of said further T junction means of said demodulator means; and means for generating and supplying a reference signal, which is phase locked to one of the output signals from said collinear port of said first H plane T junction, to said second symmetric port of said further T junction.
Claim 3
Dependent Claim
62 words
A data encoding system in accordance with Claim 1 in which said further T junction means is a hybrid comprising first and second symmetric input ports, an E output port, and a H output port and said demodulator means further comprises: means for detecting the output of at least one of said H and E ports of said hybrid further T junction.
Claim 4
Dependent Claim
53 words
A data encoding system in accordance with Claim 1 in which said further T junction means is an E plane comprisIng first and second symmetric input ports and E output port and said demodulator means further comprises: means for detecting the output of said E port of said E plane further T junction.
Claim 5
Dependent Claim
54 words
A data encoding system in accordance with Claim 1 in which said further T junction means is an H plane comprising first and second symmetric input ports and an H output port and said demodulator means further comprises: means for detecting the output of said H port of said H plane further T junction.
Claim 6
Dependent Claim
293 words
A date encoding system comprising modulator means and demodulator means, with said modulator means with said modulator means comprising: a first E plane T junction having first and second symmetric ports and a collinear port; means for supplying an input carrier signal into said collinear port; a first H plane T junction having first and second symmetric ports and a collinear port; first switching means constructed to respond to a control signal to connect or to disconnect the first symmetric port of said first E plane T junction to the first symmetric port of said first H plane T junction; second switching means constructed to respond to a control signal to connect or to disconnect said second symmetric port of said first E plane T junction to said second symmetric port of said first H plane T junction; means for generating and supplying a two-level control signal to said first switching means and an inverted form of said two-level control signal to said second switching means to cause first said switching means to become conductive during a first level of said two-level control signal and said second switching means to become conductive during said second level of said two-level control signal; demodulator means including further T junction means comprising first and second symmetric input ports and at least one output port; means for supplying the signal output from said collinear port of said H plane T junction to said first symmetric input port of said further T junction means of said demodulator means; and means for generating and supplying a reference signal, which is phase locked to one of the output signals from said collinear port of said first E plane T junction, to said second symmetric port of said further T junction.
Claim 7
Dependent Claim
293 words
A date encoding system comprising modulator means and demodulator means, with said modulator means with said modulator means comprising: a first E plane T junction having first and second symmetric ports and a collinear port; means for supplying an input carrier signal into said collinear port; a first H plane T junction having first and second symmetric ports and a collinear port; first switching means constructed to respond to a control signal to connect or to disconnect the first symmetric port of said first E plane T junction to the first symmetric port of said first H plane T junction; second switching means constructed to respond to a control signal to connect or to disconnect said second symmetric port of said first E plane T junction to said second symmetric port of said first H plane T junction; means for generating and supplying a two-level control signal to said first switching means and an inverted form of said two-level control signal to said second switching means to cause first said switching means to become conductive during a first level of said two-level control signal and said second switching means to become conductive during said second level of said two-level control signal; demodulator means including further T junction means comprising first and second symmetric input ports and at least one output port; means for supplying the signal output from said collinear port of said H plane T junction to said first symmetric input port of said further T junction means of said demodulator means; and means for generating and supplying a reference signal, which is phase locked to one of the output signals from said collinear port of said first E plane T junction, to said second symmetric port of said further T junction.
Claim 8
Dependent Claim
46 words
A data encoding system in accordance with Claim 5 wherein said output port of said further T junction means is a collinear port and said demodulator means further comprises: means for detecting the output signal appearing at said collinear port of said further T junction means.
Claim 9
Dependent Claim
54 words
A data encoding system in accordance with Claim 5 in which said further T junction means is an E plane comprising first and second symmetric input ports and an E output port and said demodulator means further comprises: means for detecting the output of said E port of said E plane further T junction.
Claim 10
Dependent Claim
54 words
A data encoding system in accordance with Claim 5 in which said further T junction means is an H plane comprising first and second symmetric input ports and an H output port and said demodulator means further comprises: means for detecting the output of said H port of said H plane further T junction.
Claim 11
Dependent Claim
239 words
A data encoding system comprising modulator means and demodulator means, with said modulator means comprising: a first E plane T junction and a first H plane T junction, each comprising first and second symmetric ports and a collinear port; first and second switching means constructed to respond to a control signal to connect the first and second ports, respectively, of said H plane T junction to the first and second ports, respectively, of said E plane T junction; means for supplying an input carrier signal to a first of said collinear ports; means for generating and supplying to said first and second switching means a control signal having at least a first state and a second state to cause each of said first and second switching means to become conductive in response to said first and second states, respectively, of said control signal; demodulator means including further T junction means comprising first and second symmetric input ports and at least one output port; means for supplying an output signal from the other of said collinear ports to said first symmetric input port of said further T junction means of said demodulator means; and means for generating and supplying a reference signal, which is phase locked to a signal appearing at one of said collinear ports of said first E plane T junction and said first H plane T junction, to said second symmetric port of said further T junction.
Claim 12
Dependent Claim
239 words
A data encoding system comprising modulator means and demodulator means, with said modulator means comprising: a first E plane T junction and a first H plane T junction, each comprising first and second symmetric ports and a collinear port; first and second switching means constructed to respond to a control signal to connect the first and second ports, respectively, of said H plane T junction to the first and second ports, respectively, of said E plane T junction; means for supplying an input carrier signal to a first of said collinear ports; means for generating and supplying to said first and second switching means a control signal having at least a first state and a second state to cause each of said first and second switching means to become conductive in response to said first and second states, respectively, of said control signal; demodulator means including further T junction means comprising first and second symmetric input ports and at least one output port; means for supplying an output signal from the other of said collinear ports to said first symmetric input port of said further T junction means of said demodulator means; and means for generating and supplying a reference signal, which is phase locked to a signal appearing at one of said collinear ports of said first E plane T junction and said first H plane T junction, to said second symmetric port of said further T junction.
Claim 13
Dependent Claim
54 words
A data encoding system in accordance with Claim 9 in which said further T junction means is an E plane comprising first and second symmetric input ports and an E output port and said demodulator means further comprises: means for detecting the output of said E port of said E plane further T junction.
Claim 14
Dependent Claim
62 words
A data encoding system in accordance with Claim 9 in which said further T junction means is a hybrid comprising first and second symmetric input ports, an E output port, and an H output port and said demodulator means further comprises: means for detecting the output of at least one of said H or E ports of said hybrid further T junction.
Claim 15
Dependent Claim
52 words
A data encoding system in accordance with Claim 9 in which said further T junction means is an H plane comprising first and second symmetric ports and an H port and said demodulator means further comprises: means for detecting the output of said H port of said second H plane T junction.
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) | 1974-08-23 | 1975-02-22 | 1975-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-23 | 1979-02-22 | 1979-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-23 | 1983-02-22 | 1983-08-24 | $7700.00 | Window Closed / Lapsed |