US3704409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital reflection coefficient detector
Assignee: JM Huber Corp
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Filing: 1971-05-24
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Granted: 1972-11-28
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Expires: 1991-05-24
Abstract
Abstract There are shown herein an apparatus and method for indicating and storing the modulus of the reflection coefficient in a radio frequency system. The apparatus makes use of voltages Er and Ef. Voltage Er is a measure of the power reflected back from the load. Voltage Ef is a measure of the forward power sent toward the load by the source. The analog quantities Er and NEf are applied to a comparator, the output of which is utilized to control an up-down counter which stores the quantity N, the modulus of the reflection coefficient. The up-down counter controls a digital to analog converter which utilizes the quantity Ef as a reference and produces the analog output NEf.
Inventors
- 👤 Johannes A F Oomen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:11
CPC Classifications
G; G01; G01R; G01R27/00; G01R27/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
165 words
In a radio frequency system in which power is transferred from a source to a load, the combination of: means for deriving the reflected voltage or quantity Er, means for deriving the forward voltage or quantity Ef, and a feedback voltage input encoder comprising: a comparator having a first input for the voltage Er and also a second input, an up-down counter, a digital to analog converter having an output coupled to the comparator and having also an input, the quantity Ef being applied to said converter input and the quantity NEf being the converter output so that the comparator output produces a signal indicating whether Er or NEf is greater, a source of clock pulses, and means coupled to the comparator for channeling the pulses to the up-down counter in such fashion as to increase the count when the quantity Er prevails and to decrease the count when the quantity NEf prevails, whereby the up-down counter registers the modulus N of the reflection coefficient.
Claim 2
Dependent Claim
165 words
In a radio frequency system in which power is transferred from a source to a load, the combination of: means for deriving the reflected voltage or quantity Er, means for deriving the forward voltage or quantity Ef, and a feedback voltage input encoder comprising: a comparator having a first input for the voltage Er and also a second input, an up-down counter, a digital to analog converter having an output coupled to the comparator and having also an input, the quantity Ef being applied to said converter input and the quantity NEf being the converter output so that the comparator output produces a signal indicating whether Er or NEf is greater, a source of clock pulses, and means coupled to the comparator for channeling the pulses to the up-down counter in such fashion as to increase the count when the quantity Er prevails and to decrease the count when the quantity NEf prevails, whereby the up-down counter registers the modulus N of the reflection coefficient.
Claim 3
Dependent Claim
121 words
In a radio frequency system in which power is transferred from a source to a load, a reflection coefficient modulus detector comprising: means for deriving the reflected voltage or quantity Er, means for deriving the forward voltage or quantity Ef, converter means providing digital storage and having an input to which the voltage Ef is applied as a reference and also an analog output producing a voltage equal the product of Ef and N, means for comparing the quantities Ef and NEr and producing a bidirectional control signal, and means coupled to the converter means for utilizing the bidirectional control signal to establish the digital settings of said converter, whereby said settings are a measure of N, the reflection coefficient modulus.
Claim 4
Dependent Claim
121 words
In a radio frequency system in which power is transferred from a source to a load, a reflection coefficient modulus detector comprising: means for deriving the reflected voltage or quantity Er, means for deriving the forward voltage or quantity Ef, converter means providing digital storage and having an input to which the voltage Ef is applied as a reference and also an analog output producing a voltage equal the product of Ef and N, means for comparing the quantities Ef and NEr and producing a bidirectional control signal, and means coupled to the converter means for utilizing the bidirectional control signal to establish the digital settings of said converter, whereby said settings are a measure of N, the reflection coefficient modulus.
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) | 1975-11-28 | 1976-05-29 | 1976-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-28 | 1980-05-29 | 1980-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-28 | 1984-05-29 | 1984-11-28 | $7700.00 | Window Closed / Lapsed |