System and method for detecting an assymetrically positioned internal object in a body
Inventors
Fhager, Andreas • Persson, Mikael • Jacobsson, Harald • VINGE, Rikard
Assignees
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Publication Number
US-11857305-B2
Publication Date
2024-01-02
Expiration Date
Abstract
Disclosed is a system for detecting an internal object in a body. The system includes at least one antenna pair including two antennas which are adapted to be symmetrically positioned around the body in relation to a line of symmetry. The system is adapted to transmit microwave signal into the body which are reflected and/or scattered from the internal object. The system is adapted to receive the reflected and/or scattered microwave signals, and to compare the received microwave signals at the symmetrically positioned antennas. The system is adapted to detect the internal object or a change in an already detected internal object when there is a difference between the received microwave signals at symmetric antenna pairs. The difference is related to the different dielectric properties between the internal object and the body.
Core Innovation
The invention relates to a system for detecting an internal object in a body, where the internal object and the body have different dielectric properties. The body is initially substantially symmetric and has a symmetry line dividing the body into two body parts that are counterparts, with each counterpart substantially symmetric in shape and in content when no internal object is located in the body.
The system includes at least one antenna pair with two antennas configured to be positioned directly opposite one another in relation to the body and on opposite sides of the symmetry line in the respective counterparts. One antenna is symmetrically positioned around the body with respect to the other antenna and in relation to the symmetry line, and the antennas of each antenna pair are directly opposite one another on a plane passing through the body and perpendicular to the symmetry line.
The system transmits at least one microwave signal into the body from at least one antenna, where the transmitted microwave signal is reflected and/or scattered from the internal object, and the system receives reflected and/or scattered signals at symmetrically positioned antennas. Detection is performed by comparing received microwave signals at symmetrically positioned antennas and analyzing one or more of a plurality of asymmetries and changes in asymmetries in the received microwave signals, including asymmetries in received p-n sequence data.
Claims Coverage
The independent claims explicitly cover a microwave detection system and a corresponding method that analyze dielectric-related asymmetries between symmetrically positioned antenna pairs. Across the independent claims, the inventive features concentrate on symmetric antenna placement around a body symmetry line and detection based on asymmetries, including asymmetries in received p-n sequence data, and changes in those asymmetries.
Microwave antenna-pair sensing of a dielectric-contrasting internal object
A system transmits at least one microwave signal into a body from at least one antenna, receives reflected and/or scattered microwave signals at symmetrically positioned antennas, compares the received signals at symmetrically positioned antennas, and detects an internal object or a change in an already-detected internal object when differences between symmetric antenna-pair responses are related to different dielectric properties between the internal object and the body.
Symmetry-line-based antenna pairing directly opposite across body counterparts
The system uses at least one antenna pair comprising two antennas positioned directly opposite one another in relation to the body on opposite sides of a symmetry line, where one antenna in the antenna pair is configured to be symmetrically positioned around the body with respect to the other antenna and in relation to the symmetry line, and where the antennas of each antenna pair are directly opposite one another on a plane passing through the body and perpendicular to the symmetry line.
Asymmetry and temporal change analysis using p-n sequence data
The system detects based on an analysis of one or more of a plurality of asymmetries and changes in asymmetries in the received microwave signals, where the asymmetries include asymmetries in received p-n sequence data of the received microwave signals.
Symmetry-line-based microwave detection method for internal objects
A method transmits at least one microwave signal into the body from at least one antenna, receives reflected and/or scattered microwave signals at one or more of the other antenna and the transmitting antenna with defined receiver operation, compares received microwave signals at symmetrically positioned antennas, and detects an internal object or a change in an already-detected internal object based on dielectric-related differences between received signals at symmetric antenna pairs, using asymmetries including asymmetries in received p-n sequence data and changes in asymmetries.
The independent claims broadly require symmetric antenna-pair sensing across a body symmetry line and detection by comparing received microwave responses at symmetric antenna pairs using dielectric-related asymmetry measures, including asymmetries in received p-n sequence data and analysis of changes in asymmetries.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Not explicitly described in patent.
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