System and method for microwave imaging using an interleaved pattern in a programmable reflector array
First Claim
1. A reflector array for use in a microwave imaging system to capture a microwave image of an object, comprising:
- a plurality of reflecting antenna elements capable of being programmed with respective phase-shifts in a first pattern to direct a first beam of microwave radiation towards a first target, and capable of being programmed with respective phase-shifts in a second pattern to direct a second beam of microwave radiation towards a second target;
wherein said plurality of antenna elements are programmed with respective phase-shifts in an interleaved pattern including a portion of said first pattern and a portion of said second pattern to capture said microwave image of said object, wherein each of said plurality of antenna elements are quantized phase-shifted antenna elements, and wherein said phase-shifts of each of said plurality of antenna elements for said first pattern and said second pattern are selected based on an ideal phase, and wherein said portion of said first pattern and said portion of said second pattern in said interleaved pattern are each selected to minimize a quantization error based on a phase offset from said ideal phase for each of said plurality of antenna elements.
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Abstract
An antenna array for use within a microwave imaging system includes a plurality of reflecting antenna elements, each capable of being programmed with respective phase-shifts in a first pattern to direct a first beam of microwave radiation towards a first target, and each being capable of being programmed with respective phase-shifts in a second pattern to direct a second beam of microwave radiation towards a second target. To capture a microwave image of an object, the antenna elements are programmed with respective phase-shifts in an interleaved pattern including a portion of the first pattern and a portion of the second pattern.
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Citations
9 Claims
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1. A reflector array for use in a microwave imaging system to capture a microwave image of an object, comprising:
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a plurality of reflecting antenna elements capable of being programmed with respective phase-shifts in a first pattern to direct a first beam of microwave radiation towards a first target, and capable of being programmed with respective phase-shifts in a second pattern to direct a second beam of microwave radiation towards a second target; wherein said plurality of antenna elements are programmed with respective phase-shifts in an interleaved pattern including a portion of said first pattern and a portion of said second pattern to capture said microwave image of said object, wherein each of said plurality of antenna elements are quantized phase-shifted antenna elements, and wherein said phase-shifts of each of said plurality of antenna elements for said first pattern and said second pattern are selected based on an ideal phase, and wherein said portion of said first pattern and said portion of said second pattern in said interleaved pattern are each selected to minimize a quantization error based on a phase offset from said ideal phase for each of said plurality of antenna elements. - View Dependent Claims (2, 3, 4, 5)
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6. A microwave imaging system for capturing a microwave image of a target, comprising:
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a microwave source for providing microwave radiation; a microwave receiver for receiving microwave radiation; and a reflector antenna array including a plurality of antenna elements, each of said antenna elements being capable of being programmed with respective phase-shifts in a transmit pattern to direct a beam of microwave radiation from said microwave source towards said target, and each being capable of being programmed with respective phase-shifts in a receive pattern to reflect a reflected beam of microwave radiation reflected from said target towards said microwave receiver; wherein said plurality of antenna elements are programmed with respective phase-shifts in an interleaved pattern including a portion of said transmit pattern and a portion of said receive pattern to capture said microwave image of said target, wherein each of said plurality of antenna elements are quantized phase-shifted antenna elements, and wherein said phase-shifts of each of said plurality of antenna elements for said transmit pattern and said receive pattern are selected based on an ideal phase, and wherein said portion of said transmit pattern and said portion of said receive pattern in said interleaved pattern are each selected to minimize a quantization error based on a phase offset from said ideal phase for each of said plurality of antenna elements. - View Dependent Claims (7)
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8. A method for configuring an array of reflecting antenna elements to capture a microwave image of a target, comprising:
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providing an array including a plurality of reflecting antenna elements; designing a transmit pattern of respective phase-shifts for each of the reflecting antenna elements to direct a beam of microwave radiation from a microwave source towards the target; designing a receive pattern of respective phase-shifts for each of the reflecting antenna elements to reflect a reflected beam of microwave radiation reflected from the target towards a microwave receiver; and programming each of the microwave antenna elements with a respective phase-shift in an interleaved pattern including a portion of the transmit pattern and a portion of the receive pattern, wherein said designing the transmit pattern and said designing the receive pattern includes selecting the phase-shifts of each of the plurality of antenna elements for the transmit pattern and the receive pattern based on an ideal phase, and wherein each of the reflecting antenna elements are quantized phase-shifted antenna elements, and wherein said programming further includes selecting the portion of the transmit pattern and the portion of the receive pattern in the interleaved pattern to minimize a quantization error based on a phase offset from the ideal phase for each of the plurality of antenna elements. - View Dependent Claims (9)
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Specification