US4716362A
Expired / Lapsed
US
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Surface wave dispersive filter spectrum analyzer
Assignee: Thales SA
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Filing: 1985-10-21
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Granted: 1987-12-29
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Expires: 2005-10-21
Abstract
Abstract A surface wave dispersive filter spectrum analyzer is provided comprising two identical assemblies having "M-C-M" structure (premultiplication, convolution and post-multiplication, respectively by a first, second and third linearly frequency modulated ramps), one analyzing the signal to be analyzed, the other a reference signal, the output signal being obtained after mixing the output signals of the first and second assemblies in a mixer.
Inventors
- 👤 Rene Ambos
- 👤 Gilles Quagliaro
- 👤 Alain Fertil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:28
CPC Classifications
G; G01; G01R; G01R23/00; G01R23/16; G01R23/165
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
257 words
A surface wave dispersive filter spectrum analyzer, comprising: a first M-C-M analyzer including: first dispersive filter means for receiving a first driving signal, and for delivering a first linearly frequency modulated ramp signal; first mixer means for receiving an input signal f (t), and for premultiplying said signal f(t) by said first ramp signal to provide a first multiplied signal; second dispersive filter means for convoluting said first multiplied signal with a second linearly frequency modulated ramp signal to provide a first convoluted signal; third dispersive filter means for receiving a second driving signal, and for delivering a second linearly frequency modulated ramp signal; and second mixer means for postmultiplying said first convoluted signal by said second ramp signal to provide a first analyzed signal; a second M-C-M analyzer including: fourth dispersive filter means for receiving said first driving signal, and for delivering a fourth linearly frequency modulated ramp signal; third mixer means for receiving a reference signal, and for premultiplying said reference signal by said fourth ramp signal to provide a second multiplied signal; fifth dispersive filter means for convoluting said second multiplied signal with a fifth linearly frequency modulated ramp signal to provide a second convoluted signal; sixth dispersive filter means for receiving said second driving signal, and for providing a sixth linearly frequency modulated ramp signal; and fourth mixer means for postmultiplying said second convoluted signal by said sixth ramp signal to provide a second analyzed signal; and fifth mixer means for mixing said first and second analyzed signals to provide an output signal.
Claim 2
Dependent Claim
257 words
A surface wave dispersive filter spectrum analyzer, comprising: a first M-C-M analyzer including: first dispersive filter means for receiving a first driving signal, and for delivering a first linearly frequency modulated ramp signal; first mixer means for receiving an input signal f (t), and for premultiplying said signal f(t) by said first ramp signal to provide a first multiplied signal; second dispersive filter means for convoluting said first multiplied signal with a second linearly frequency modulated ramp signal to provide a first convoluted signal; third dispersive filter means for receiving a second driving signal, and for delivering a second linearly frequency modulated ramp signal; and second mixer means for postmultiplying said first convoluted signal by said second ramp signal to provide a first analyzed signal; a second M-C-M analyzer including: fourth dispersive filter means for receiving said first driving signal, and for delivering a fourth linearly frequency modulated ramp signal; third mixer means for receiving a reference signal, and for premultiplying said reference signal by said fourth ramp signal to provide a second multiplied signal; fifth dispersive filter means for convoluting said second multiplied signal with a fifth linearly frequency modulated ramp signal to provide a second convoluted signal; sixth dispersive filter means for receiving said second driving signal, and for providing a sixth linearly frequency modulated ramp signal; and fourth mixer means for postmultiplying said second convoluted signal by said sixth ramp signal to provide a second analyzed signal; and fifth mixer means for mixing said first and second analyzed signals to provide an output signal.
Claim 3
Dependent Claim
15 words
The analyzer as claimed in claim 1, wherein said reference signal is a Dirac pulse.
Claim 4
Dependent Claim
143 words
A surface wave dispersive filter spectrum analyzer, comprising: first dispersive filter means for receiving a driving signal, and for delivering a first linearly frequency modulated ramp signal; first mixer means for receiving an input signal f(t), and for premultiplying said signal f(t) by said first ramp signal to provide a first multiplied signal; second mixer means for receiving a reference signal, and for premultiplying said reference signal by said first ramp signal to provide a second multiplied signal; second dispersive filter means for convoluting said first multiplied signal with a second linearly frequency modulated ramp signal to provide a first convoluted signal; third dispersive filter means for convoluting said second multiplied signal with a third linearly frequency modulated ramp signal to provide a second convoluted signal; and third mixer means for mixing said first and second convoluted signals to provide an output signal.
Claim 5
Dependent Claim
143 words
A surface wave dispersive filter spectrum analyzer, comprising: first dispersive filter means for receiving a driving signal, and for delivering a first linearly frequency modulated ramp signal; first mixer means for receiving an input signal f(t), and for premultiplying said signal f(t) by said first ramp signal to provide a first multiplied signal; second mixer means for receiving a reference signal, and for premultiplying said reference signal by said first ramp signal to provide a second multiplied signal; second dispersive filter means for convoluting said first multiplied signal with a second linearly frequency modulated ramp signal to provide a first convoluted signal; third dispersive filter means for convoluting said second multiplied signal with a third linearly frequency modulated ramp signal to provide a second convoluted signal; and third mixer means for mixing said first and second convoluted signals to provide an output signal.
Claim 6
Dependent Claim
224 words
A surface wave dispersive filter spectrum analyzer, comprising: first dispersive filter means for receiving a first driving signal, and for delivering a first linearly frequency modulated ramp signal; first mixer means for receiving an input signal f(t), and for premultiplying said signal f(t) by said first ramp signal to provide a first multiplied signal; second dispersive filter means for convoluting said first multiplied signal with a second linearly frequency modulated ramp signal to provide a first convoluted signal; third dispersive filter means for receiving a second driving signal, and for delivering a third linearly frequency modulated ramp signal; second mixer means for postmultiplying said first convoluted signal by said third ramp signal to provide a first analyzed signal; third mixer means for receiving a reference signal, and for premultiplying said reference signal by said first ramp signal to provide a second multiplied signal; fourth dispersive filter means for convoluting said second multiplied signal with a fourth linearly frequency modulated ramp signal to provide a second convoluted signal; fifth dispersive filter means for receiving said second driving signal, and for providing a fifth linearly frequency modulated ramp signal; fourth mixer means for postmultiplying said second convoluted signal by said fifth ramp signal to provide a second analyzed signal; and fifth mixer means for mixing said first and second analyzed signals to provide an output signal.
Claim 7
Dependent Claim
224 words
A surface wave dispersive filter spectrum analyzer, comprising: first dispersive filter means for receiving a first driving signal, and for delivering a first linearly frequency modulated ramp signal; first mixer means for receiving an input signal f(t), and for premultiplying said signal f(t) by said first ramp signal to provide a first multiplied signal; second dispersive filter means for convoluting said first multiplied signal with a second linearly frequency modulated ramp signal to provide a first convoluted signal; third dispersive filter means for receiving a second driving signal, and for delivering a third linearly frequency modulated ramp signal; second mixer means for postmultiplying said first convoluted signal by said third ramp signal to provide a first analyzed signal; third mixer means for receiving a reference signal, and for premultiplying said reference signal by said first ramp signal to provide a second multiplied signal; fourth dispersive filter means for convoluting said second multiplied signal with a fourth linearly frequency modulated ramp signal to provide a second convoluted signal; fifth dispersive filter means for receiving said second driving signal, and for providing a fifth linearly frequency modulated ramp signal; fourth mixer means for postmultiplying said second convoluted signal by said fifth ramp signal to provide a second analyzed signal; and fifth mixer means for mixing said first and second analyzed signals to provide an output signal.
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) | 1990-12-28 | 1991-06-29 | 1991-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-28 | 1995-06-29 | 1995-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-28 | 1999-06-29 | 1999-12-29 | $7700.00 | Window Closed / Lapsed |