US4083004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expendable repeater employing harmonic mixing
Assignee: Westinghouse Electric Corp
•
Filing: 1976-06-08
•
Granted: 1978-04-04
•
Expires: 1996-06-08
Abstract
Abstract An expendable signal repeater for transmitting a replica of received signals in which the received signals are converted to an intermediate frequency by mixing in a down-converter with an upper harmonic of a heterodyning signal provided by a local oscillator; the intermediate frequency signals are delayed; and the delayed, intermediate frequency signals are converted to the transmitted signal by mixing in an up-converter with the upper harmonic of the amplified, local oscillator heterodyning signal. A mechanism is provided for switching the local oscillator between the down-converter and the up-converter during the delay of the intermediate frequency signals to prevent feedback of the transmitted signal.
Inventors
- 👤 Marvin Cohn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:23
CPC Classifications
H; H04; H04B; H04B7/00; H04B7/14; H04B7/15
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
144 words
A signal repeater for providing a transmitted signal in response to a received signal, said repeater comprising: an oscillator for providing a heterodyning signal; means for down-converting the received signal by mixing the received signal with a harmonic of the fundamental heterodyning signal of said oscillator to provide an intermediate frequency signal; means for delaying the propagation of said intermediate frequency signal for a predetermined time; means for up-converting the intermediate frequency signal by mixing the intermediate frequency signal with a harmonic of the heterodyning signal of said oscillator to provide the transmitted signal having a frequency which is substantially equal to the frequency of the received signal; and means for switching the heterodyning signal of said oscillator between said down-converting means and said up-converting means in response to the propagation of said intermediate frequency signal between said down-converting means and said up-converting means.
Claim 2
Dependent Claim
144 words
A signal repeater for providing a transmitted signal in response to a received signal, said repeater comprising: an oscillator for providing a heterodyning signal; means for down-converting the received signal by mixing the received signal with a harmonic of the fundamental heterodyning signal of said oscillator to provide an intermediate frequency signal; means for delaying the propagation of said intermediate frequency signal for a predetermined time; means for up-converting the intermediate frequency signal by mixing the intermediate frequency signal with a harmonic of the heterodyning signal of said oscillator to provide the transmitted signal having a frequency which is substantially equal to the frequency of the received signal; and means for switching the heterodyning signal of said oscillator between said down-converting means and said up-converting means in response to the propagation of said intermediate frequency signal between said down-converting means and said up-converting means.
Claim 3
Dependent Claim
54 words
The signal repeater as claimed in claim 1 further comprising: a first amplifier for amplifying the intermediate frequency signal of said down-converting means before it is provided to said delaying means; and a second amplifier for amplifying the intermediate frequency signal delayed by said delaying means before it is provided to said up-converting means.
Claim 4
Dependent Claim
23 words
The signal repeater as claimed in claim 1 further comprising: an oscillator amplifier for amplifying the heterodyning signal provided to said up-converting means.
Claim 5
Dependent Claim
18 words
The apparatus of claim 3 in which said oscillator amplifier is comprised of a Class C type amplifier.
Claim 6
Dependent Claim
50 words
The signal repeater as claimed in claim 1 in which said down-converting means mixes the received signal with an even harmonic of the heterodyning signal of said oscillator; and in which said up-converting means mixes the intermediate frequency signal with an even harmonic of the heterodyning signal of said oscillator.
Claim 7
Dependent Claim
24 words
The signal repeater as claimed in claim 5 in which said down-converting means is comprised of an anti-parallel diode pair mounted across a waveguide.
Claim 8
Dependent Claim
24 words
The signal repeater as claimed in claim 6 in which said up-converting means is comprised of an anti-parallel diode pair mounted across a waveguide.
Claim 9
Dependent Claim
25 words
The signal repeater as claimed in claim 6 in which said up-converting means is comprised of an anti-parallel varactor diode pair mounted across a waveguide.
Claim 10
Dependent Claim
191 words
A signal repeater for providing a transmitted signal in response to a received signal, said repeater comprising: an oscillator for providing a heterodyning signal; means for down-converting the received signal by mixing the received signal with a harmonic of the heterodyning signal of said oscillator to provide an intermediate frequency signal; a first amplifier for amplifying the intermediate frequency signal of said down-converting means; means for delaying the propagation of said intermediate frequency signal amplified by said first amplifier for a predetermined time; a second amplifier for amplifying the intermediate frequency signal delayed by said delaying means; an oscillator amplifier for amplifying the heterodyning signal; means for up-converting the intermediate frequency signal amplified by said second amplifier by mixing the amplified, intermediate frequency signal with a harmonic of the heterodyning signal amplified by said oscillator amplifier to provide the transmitted signal having a frequency which is substantially equal to the frequency of the received signal; and means for switching the heterodyning signal of said oscillator between said down-converting means and said oscillator amplifier in response to the propagation of said intermediate frequency signal between said down-converting means and said up-converting means.
Claim 11
Dependent Claim
191 words
A signal repeater for providing a transmitted signal in response to a received signal, said repeater comprising: an oscillator for providing a heterodyning signal; means for down-converting the received signal by mixing the received signal with a harmonic of the heterodyning signal of said oscillator to provide an intermediate frequency signal; a first amplifier for amplifying the intermediate frequency signal of said down-converting means; means for delaying the propagation of said intermediate frequency signal amplified by said first amplifier for a predetermined time; a second amplifier for amplifying the intermediate frequency signal delayed by said delaying means; an oscillator amplifier for amplifying the heterodyning signal; means for up-converting the intermediate frequency signal amplified by said second amplifier by mixing the amplified, intermediate frequency signal with a harmonic of the heterodyning signal amplified by said oscillator amplifier to provide the transmitted signal having a frequency which is substantially equal to the frequency of the received signal; and means for switching the heterodyning signal of said oscillator between said down-converting means and said oscillator amplifier in response to the propagation of said intermediate frequency signal between said down-converting means and said up-converting means.
Claim 12
Dependent Claim
165 words
The apparatus of claim 9 in which said switching means comprises: a first directional coupler providing an output in response to the output of said first amplifier; a first video detector for providing the envelope of the output of said first directional coupler; a first differentiator for providing an output signal which is representative of the differential of the output of said first video detector; a second directional coupler providing an output in response to the output of said second amplifier; a second video detector for providing the envelope of the output of said second directional coupler; a second differentiator for providing an output signal which is representative of the differential of the output of said second video detector; a switch driver for providing an output in response to said first differentiator and in response to said second differentiator; and a switch for selectively connecting said oscillator to said down-converting means and to said oscillator amplifier in response to the output of said switch driver.
Claim 13
Independent Claim
106 words
A method for providing a transmitted signal in response to a received signal, said method comprising: providing a heterodyning signal; down-converting the received signal by a harmonic of the heterodyning signal to provide an intermediate frequency signal; delaying the propagation of said intermediate frequency signal for a predetermined time; up-converting the intermediate frequency signal by a harmonic of the heterodyning signal to provide the transmitted signal having a frequency which is substantially equal to the frequency of the received signal; and switching the heterodyning signal in response to the propagation of said intermediate frequency signal to prevent said transmitted signal from appearing as a received signal.
Claim 14
Independent Claim
106 words
A method for providing a transmitted signal in response to a received signal, said method comprising: providing a heterodyning signal; down-converting the received signal by a harmonic of the heterodyning signal to provide an intermediate frequency signal; delaying the propagation of said intermediate frequency signal for a predetermined time; up-converting the intermediate frequency signal by a harmonic of the heterodyning signal to provide the transmitted signal having a frequency which is substantially equal to the frequency of the received signal; and switching the heterodyning signal in response to the propagation of said intermediate frequency signal to prevent said transmitted signal from appearing as a received signal.
References Cited (Backward Citations)
US2228815A
Cited
US2369268A
Cited
US2489273A
Cited
US2561363A
Cited
US2674692A
Cited
US2671850A
Cited
US3127603A
Cited
US3113268A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-04-03 | 1981-10-03 | 1982-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-03 | 1985-10-03 | 1986-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-03 | 1989-10-03 | 1990-04-04 | $7700.00 | Window Closed / Lapsed |