Patent US7183963B2 successfully refreshed from Google Patents.
US7183963B2
Expired / Lapsed
US
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System and method for inspecting transportable items using microwave imaging
Assignee: Agilent Technologies Inc
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Filing: 2005-03-24
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Granted: 2007-02-27
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Expires: 2025-03-24
Abstract
Abstract An inspection system uses microwave radiation to capture a microwave image of a transportable item. The system includes a transmit scanning panel including a transmit array of transmit antenna elements, each being programmable with a respective phase delay to direct a transmit beam of microwave radiation toward a target of the transportable item for transmission of the microwave radiation through the target. The system further includes a receive scanning panel including a receive array of receive antenna elements, each being programmable with a respective phase delay to receive a receive beam of microwave radiation from the target. A processor measures the amplitude and phase of the microwave radiation in the receive beam to determine a relative value of a pixel within the microwave image of the transportable item based on a reference value of the pixel.
Inventors
- 👤 Gregory Steven Lee
- 👤 Robert C. Taber
- 👤 Izhak Baharav
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 03:30
CPC Classifications
G; G01; G01N; G01N22/00; G01S; G01S13/00; G01S13/87; G01S13/88; G01S13/89; G01V; G01V8/00; G01V8/005
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
133 words
A microwave inspection system for inspecting transportable items, comprising: a transmit scanning panel including a transmit array of transmit antenna elements, each of the transmit antenna elements being programmably controllable to implement a respective phase delay to direct a transmit beam of microwave radiation toward a target of the transportable item for transmission therethrough; a receive scanning panel including a receive array of receive antenna elements, each of the receive antenna elements being programmably controllable to implement a respective phase delay to receive a receive beam of microwave radiation from the target; and a processor operable to measure an amplitude and phase of the microwave radiation in the receive beam to determine a relative value of a pixel within an image of the transportable item based on a reference value of the pixel.
Claim 2
Dependent Claim
133 words
A microwave inspection system for inspecting transportable items, comprising: a transmit scanning panel including a transmit array of transmit antenna elements, each of the transmit antenna elements being programmably controllable to implement a respective phase delay to direct a transmit beam of microwave radiation toward a target of the transportable item for transmission therethrough; a receive scanning panel including a receive array of receive antenna elements, each of the receive antenna elements being programmably controllable to implement a respective phase delay to receive a receive beam of microwave radiation from the target; and a processor operable to measure an amplitude and phase of the microwave radiation in the receive beam to determine a relative value of a pixel within an image of the transportable item based on a reference value of the pixel.
Claim 3
Dependent Claim
36 words
The system of claim 1 , wherein each of the transmit array and the receive array is a reflector antenna array, and wherein the transmit antenna elements and the receive antenna elements are reflecting antenna elements.
Claim 4
Dependent Claim
44 words
The system of claim 2 , wherein the transmit antenna elements are configured to receive microwave radiation from a microwave source and reflect the microwave radiation based on the respective programmed phase delays to direct the transmit beam of microwave radiation toward the target.
Claim 5
Dependent Claim
32 words
The system of claim 3 , wherein the receive antenna elements are further configured to receive the receive beam from the target and reflect the receive beam towards a receive microwave antenna.
Claim 6
Dependent Claim
22 words
The system of claim 1 , wherein at least one of the transmit array and the receive array is an active array.
Claim 7
Dependent Claim
29 words
The system of claim 1 , wherein the transmit scanning panel is capable of simultaneously directing multiple microwave beams of different frequencies towards different targets of the transportable item.
Claim 8
Dependent Claim
22 words
The system of claim 1 , further comprising: an imaging region defined between the transmit scanning panel and the receive scanning panel.
Claim 9
Dependent Claim
20 words
The system of claim 7 , further comprising: a conveyor belt for moving the transportable item through the imaging region.
Claim 10
Dependent Claim
38 words
The system of claim 8 , wherein the processor is operable to determine the relative value of the pixel using transmissive properties of the target when the target is spatially located near a center of the imaging region.
Claim 11
Dependent Claim
38 words
The system of claim 7 , wherein the processor is operable to determine the relative value of the pixel using scattering properties of the target when the target is spatially located near an edge of the imaging region.
Claim 12
Dependent Claim
50 words
The system of claim 7 , wherein the reference value of the pixel is measured at a spatial location in the imaging region associated with the target without the presence of the transportable item, and wherein the system further comprises: a memory for storing the reference value of the pixel.
Claim 13
Dependent Claim
65 words
The system of claim 11 , wherein the processor is operable to determine a current value of the pixel based on the amplitude and phase of the microwave radiation in the receive beam, and wherein the processor is further operable to determine the relative value of the pixel by computing an absolute value of the complex difference between the current value and the reference value.
Claim 14
Dependent Claim
12 words
The system of claim 1 , wherein the pixel is a voxel.
Claim 15
Independent Claim
154 words
A method for inspection of transportable items, comprising: providing a transmit array including a plurality of transmit antenna elements and a receive array including a plurality of receive antenna elements, each of the transmit antenna elements and the receive antenna elements being programmably controllable to implement a respective phase delay; directing a transmit beam of microwave radiation towards a target of a transportable item for transmission therethrough based on the phase delay of each of the transmit antenna elements; receiving a receive beam of microwave radiation from the target at the receive array based on the phase delay of each of the receive antenna elements; measuring an amplitude and phase of the microwave radiation in the receive beam to determine a current value of the pixel; and determining a relative value of the pixel based on the current value and a reference value of the pixel measured without the presence of the transportable item.
Claim 16
Independent Claim
154 words
A method for inspection of transportable items, comprising: providing a transmit array including a plurality of transmit antenna elements and a receive array including a plurality of receive antenna elements, each of the transmit antenna elements and the receive antenna elements being programmably controllable to implement a respective phase delay; directing a transmit beam of microwave radiation towards a target of a transportable item for transmission therethrough based on the phase delay of each of the transmit antenna elements; receiving a receive beam of microwave radiation from the target at the receive array based on the phase delay of each of the receive antenna elements; measuring an amplitude and phase of the microwave radiation in the receive beam to determine a current value of the pixel; and determining a relative value of the pixel based on the current value and a reference value of the pixel measured without the presence of the transportable item.
Claim 17
Dependent Claim
45 words
The method of claim 14 , wherein the directing further comprises: receiving microwave radiation at the transmit array from a microwave source; and reflecting the microwave radiation based on the respective programmed phase delays to direct the tansmit beam of microwave radiation toward the target.
Claim 18
Dependent Claim
39 words
The method of claim 15 , wherein the receiving further comprises: receiving the receive beam from the target at the receive array; and reflecting the receive beam towards a receive microwave antenna based on the respective programmed phase delays.
Claim 19
Dependent Claim
48 words
The method of claim 14 , wherein the measuring further comprises: determining the relative value of the pixel using scattering properties of the target when the target is spatially located near an edge of an imaging region defined between the transmit scanning panel and the receive scanning panel.
Claim 20
Dependent Claim
48 words
The method of claim 14 , wherein the measuring further comprises: determining the relative value of the pixel using transmissive properties of the target when the target is spatially located near a center of an imaging region defined between the transmit scanning panel and the receive scanning panel.
Claim 21
Dependent Claim
40 words
The method of claim 14 , further comprising: scanning the transportable item by repeating the directing, the receiving and the measuring for each of a plurality of targets of the transportable item to construct the image of the transportable item.
Claim 22
Dependent Claim
36 words
The method of claim 19 , wherein the scanning further comprises: scanning the transportable item while the transportable item is moving through an imaging region defined between the transmit scanning panel and the receive scanning panel.
References Cited (Backward Citations)
US4502025A
Cited
US4521861A
Cited
US4649393A
Cited
US4825215A
Cited
US5081456A
Cited
US4885592A
Cited
US5227800A
Cited
US5027125A
Cited
US5170170A
Cited
US5557283A
Cited
US5365237A
Cited
US5557108A
Cited
US5438336A
Cited
US5986590A
Cited
US6359582B1
Cited
US6037908A
Cited
US5940045A
Cited
US6353224B1
Cited
US6057761A
Cited
US6043786A
Cited
US5982326A
Cited
US6242740B1
Cited
US5940030A
Cited
US6130641A
Cited
US6480141B1
Cited
US6703964B2
Cited
US6507309B2
Cited
US6501414B2
Cited
US20030034916A1
Cited
US6549166B2
Cited
US20040056790A1
Cited
US20040080448A1
Cited
US6937182B2
Cited
US20030189510A1
Cited
US6894636B2
Cited
US6642889B1
Cited
US6876322B2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2010-02-26 | 2010-08-28 | 2011-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2014-02-26 | 2014-08-28 | 2015-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2018-02-26 | 2018-08-28 | 2019-02-27 | $7700.00 | Window Closed / Lapsed |