US4884078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antenna test and measurement system
Assignee: Raytheon Co
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Filing: 1986-08-01
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Granted: 1989-11-28
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Expires: 2006-08-01
Abstract
Abstract An improved antenna test and measurement system including a transmit antenna; means for providing a test signal to said transmit antenna and initiating the transmission thereof; a receive antenna adapted to receive the test signal as transmitted by said transmit antenna; an amplitude detector for detecting the amplitude of the received test signal; and an open loop phase detector for measuring the phase of the received test signal relative to a reference signal.
Inventors
- 👤 Theodore S. Fishkin
- 👤 Mark Skidmore
- 👤 Peter Dimitrijevic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:57
CPC Classifications
G; G01; G01R; G01R29/00; G01R29/08; G01R29/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
89 words
An antenna test and measurement system for use in far field and near field antenna test ranges comprising: a transmit antenna; means for providing a test signal to said transmit antenna and initiating the transmission thereof; a receive antenna adapted to receive said test signal transmitted by said transmit antenna; means for detecting the amplitude of the received test signal; an open loop phase detector for measuring the phase of the received test signal relative to a reference signal; and means for detecting the amplitude of the reference signal.
Claim 2
Dependent Claim
89 words
An antenna test and measurement system for use in far field and near field antenna test ranges comprising: a transmit antenna; means for providing a test signal to said transmit antenna and initiating the transmission thereof; a receive antenna adapted to receive said test signal transmitted by said transmit antenna; means for detecting the amplitude of the received test signal; an open loop phase detector for measuring the phase of the received test signal relative to a reference signal; and means for detecting the amplitude of the reference signal.
Claim 3
Dependent Claim
123 words
An antenna test and measurement system for use in far field and near field antenna test ranges comprising: a transmit antenna; means for providing a test signal to said transmit antenna and initiating the transmission thereof; a receive antenna adapted to receive said signal transmitted by said transmit antenna; means for providing a reference signal which is substantially equal to said test signal; first means for downconverting said received test signal; second means for downconverting said reference signal; first detector means for detecting the amplitude of the downconverted received test signal; second detector means for detecting the amplitude of said downconverted reference signal; and an open loop phase detector for measuring the phase of the received test signal relative to said reference signal.
Claim 4
Dependent Claim
123 words
An antenna test and measurement system for use in far field and near field antenna test ranges comprising: a transmit antenna; means for providing a test signal to said transmit antenna and initiating the transmission thereof; a receive antenna adapted to receive said signal transmitted by said transmit antenna; means for providing a reference signal which is substantially equal to said test signal; first means for downconverting said received test signal; second means for downconverting said reference signal; first detector means for detecting the amplitude of the downconverted received test signal; second detector means for detecting the amplitude of said downconverted reference signal; and an open loop phase detector for measuring the phase of the received test signal relative to said reference signal.
Claim 5
Dependent Claim
80 words
An improved method of testing and measuring an antenna comprising the steps of: (a) initiating the transmission of a test signal from a transmit antenna; (b) receiving the transmitted signal; (c) detecting the amplitude of the received test signal; (d) providing a reference signal which is substantially equal to said test signal; (e) detecting the amplitude of the reference signal; and (f) detecting the phase of the received test signal relative to the reference signal using open loop phase detection.
Claim 6
Dependent Claim
80 words
An improved method of testing and measuring an antenna comprising the steps of: (a) initiating the transmission of a test signal from a transmit antenna; (b) receiving the transmitted signal; (c) detecting the amplitude of the received test signal; (d) providing a reference signal which is substantially equal to said test signal; (e) detecting the amplitude of the reference signal; and (f) detecting the phase of the received test signal relative to the reference signal using open loop phase detection.
References Cited (Backward Citations)
US2701876A
Cited
US3166748A
Cited
US3939474A
Cited
US3378846A
Cited
US3662389A
Cited
US3825931A
Cited
US3999117A
Cited
CA1067202A
Cited
US4199668A
Cited
US4118668A
Cited
US4197856A
Cited
US4396918A
Cited
US4510622A
Cited
US4488155A
Cited
US4553145A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-11-27 | 1993-05-29 | 1993-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-27 | 1997-05-29 | 1997-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-27 | 2001-05-29 | 2001-11-28 | $7700.00 | Window Closed / Lapsed |