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US4982164A
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Method of calibrating a network analyzer
Assignee: Rohde and Schwarz GmbH and Co KG
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Filing: 1989-04-17
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Granted: 1991-01-01
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Expires: 2009-04-17
Abstract
Abstract For calibrating a network analyzer, calibration measurements are successively performed in any desired order on three different calibration standards connected between the two test ports; the first calibration standard is a two-port circuit all of whose complex scatter parameters are known and which is, for example, implemented by a direct connection of the two test ports; the second calibration standard is an attenuator of random transmission but known reflection; the third calibration standard preferably is a two-port circuit exhibiting random reflection which, however, is equal on both sides and different from the reflection of the second calibration standard.
Inventors
- 👤 Burkhard Schiek
- 👤 Eul-Hermann-Josef
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:31
CPC Classifications
G; G01; G01R; G01R27/00; G01R27/28; G01R35/00; G01R35/005
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
89 words
A method of calibrating a network analyzer, in which calibration measurements are performed successively in any desired order on three different calibration standards linked between the two test ports, characterized by using as the first calibration standard a two-port all of whose complex scattering parameters are known, using as the second calibration standard an attenuator of arbitrary transmission but known reflection, and measuring on both test ports by means of a third calibration standard an arbitrary reflection which is, however, different from the reflection of the second calibration standard.
Claim 2
Independent Claim
89 words
A method of calibrating a network analyzer, in which calibration measurements are performed successively in any desired order on three different calibration standards linked between the two test ports, characterized by using as the first calibration standard a two-port all of whose complex scattering parameters are known, using as the second calibration standard an attenuator of arbitrary transmission but known reflection, and measuring on both test ports by means of a third calibration standard an arbitrary reflection which is, however, different from the reflection of the second calibration standard.
Claim 3
Dependent Claim
38 words
The method as claimed in claim 1, characterized by using as said third calibration standard a two-port circuit with arbitrary reflection which is, however, equal on either side and different from the reflection of the second calibration standard.
Claim 4
Dependent Claim
23 words
The method as claimed in claim 2, characterized in that the two-port circuit used as said third calibration standard is a series impedance.
Claim 5
Dependent Claim
23 words
The method as claimed in claim 2, characterized in that the two port used as said third calibration standard is a shunt impedance.
Claim 6
Dependent Claim
26 words
The method as claimed in claim 1, characterized in that the first calibration two-port circuit is implemented by a direct linking of the two test ports.
Claim 7
Dependent Claim
18 words
The method as claimed in claim 5, characterized in that the said calibration attenuator is non reflectively matched.
Claim 8
Dependent Claim
16 words
The method as claimed in claim 1, characterized in that said calibration attenuator is non-reflectively matched.
Claim 9
Dependent Claim
21 words
The method as claimed in claim 1, characterized in that said calibration attenuator exhibits equal transmission in forward and reverse directions.
Claim 10
Dependent Claim
22 words
The method as claimed in claim 1, characterized in that said calibration attenuator exhibits different transmission in forward and reverse directions (insulator).
Claim 11
Dependent Claim
31 words
The method as claimed in claim 1, characterized by using as said third calibration standard a one-port circuit of known reflection which is linked to only one of the test ports.
Claim 12
Dependent Claim
33 words
The method as claimed in claim 1, characterized by using as said third calibration standard a one-port circuit of unknown reflection which is linked to each of the two test ports in succession.
Claim 13
Independent Claim
92 words
A method of calibrating a network analyzer, in which calibration measurements are performed successively in any desired order on three different calibration standards linked between the two test ports, characterized by using as the first calibration standard a two-port circuit all of whose complex scatter parameters are known, using as the second calibration standard a line of arbitrary length but known reflection, and using as the third calibration standard a two-port circuit with arbitrary reflection which is, however, equal on both sides and different from the reflection of said second calibration standard.
Claim 14
Independent Claim
92 words
A method of calibrating a network analyzer, in which calibration measurements are performed successively in any desired order on three different calibration standards linked between the two test ports, characterized by using as the first calibration standard a two-port circuit all of whose complex scatter parameters are known, using as the second calibration standard a line of arbitrary length but known reflection, and using as the third calibration standard a two-port circuit with arbitrary reflection which is, however, equal on both sides and different from the reflection of said second calibration standard.
Claim 15
Dependent Claim
26 words
The method as claimed in claim 12, characterized in that said first calibration two-port circuit is implemented by a direct linking of the two test ports.
Claim 16
Independent Claim
108 words
A method of calibrating a network analyzer, in which calibration measurements are performed successively in any desired order on three calibration standards linked between the two test ports, characterized by using as the first calibration standard a two-port circuit all of whose complex scattering parameters are known, using as the second calibration standard a one-port circuit of known reflection which is linked to each of the two test ports in succession, and using as the third calibration standard a one-port circuit of arbitrary reflection which, however, differs from the reflection of said second calibration standard, said oneport being linked to each of the two test ports in succession.
Claim 17
Independent Claim
108 words
A method of calibrating a network analyzer, in which calibration measurements are performed successively in any desired order on three calibration standards linked between the two test ports, characterized by using as the first calibration standard a two-port circuit all of whose complex scattering parameters are known, using as the second calibration standard a one-port circuit of known reflection which is linked to each of the two test ports in succession, and using as the third calibration standard a one-port circuit of arbitrary reflection which, however, differs from the reflection of said second calibration standard, said oneport being linked to each of the two test ports in succession.
Claim 18
Dependent Claim
23 words
The method as claimed in claim 14, characterized in that the one-port circuit used as said second calibration standard is a non-reflective termination.
Claim 19
Dependent Claim
21 words
The method as claimed in claim 15, characterized in that said third calibration one-port circuit is formed by a short circuit.
Claim 20
Dependent Claim
21 words
The method as claimed in claim 15, characterized in that said third calibration one-port circuit is formed by an open circuit.
Claim 21
Dependent Claim
26 words
The method as claimed in claim 14, characterized in that said first calibration two-port circuit is implemented by a direct linking of the two test ports.
Claim 22
Dependent Claim
23 words
The method as claimed in claim 18, characterized in that the one-port circuit used as said second calibration standard is a non-reflective termination.
Claim 23
Dependent Claim
31 words
The method as claimed in claim 19, characterized in that said third calibration one-port circuit is formed by a short circuit which is linked to only one of the test ports.
Claim 24
Dependent Claim
31 words
The method as claimed in claim 19, characterized in that said third calibration one-port circuit is formed by an open circuit which is linked to only one of the test ports.
Claim 25
Dependent Claim
21 words
The method as claimed in claim 18, characterized in that said third calibration one-port circuit is formed by a short circuit.
Claim 26
Dependent Claim
21 words
The method as claimed in claim 18, characterized in that said third calibration one-port circuit is formed by an open circuit.
Claim 27
Dependent Claim
31 words
The method as claimed in claim 14, characterized in that said third calibration one-port circuit is formed by a short circuit which is linked to only one of the test ports.
Claim 28
Dependent Claim
31 words
The method as claimed in claim 14, characterized in that said third calibration one-port circuit is formed by an open circuit which is linked to only one of the test ports.
References Cited (Backward Citations)
US4853613A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-12-31 | 1994-07-02 | 1995-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-31 | 1998-07-02 | 1999-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-31 | 2002-07-02 | 2003-01-01 | $7700.00 | Window Closed / Lapsed |