74 results about "Microwave imaging" patented technology

The invention discloses an oil-water well acidification continuous construction electric control system based on multi-parameter monitoring, and relates to the technical field related to acidification control in oil-gas field development, and the system comprises a multi-source data fusion monitoring module which integrates wellhead pressure, temperature, flow, pH value, H2S concentration and acid liquid conductivity, and an underground microwave imaging sensor carries out multi-physical quantity collection; a multi-objective optimization controller is designed, and the acid etching depth, the crack flow conductivity and the construction cost are balanced; the self-adaptive construction control module is based on a variable-frequency and variable-speed acid pump system controlled by a fuzzy sliding mode and is used for realizing stepless regulation of displacement; an intelligent shunting system is arranged, and acid liquor distribution is dynamically adjusted according to the suction volume of each layer section. According to the variable-frequency acid pump system based on fuzzy sliding mode control, stepless adjustment of the displacement is achieved; the intelligent flow distribution system dynamically prepares liquid according to the suction volume of each layer section; and through a three-stage safety interlocking mechanism, power can be cut off and emergency acid discharge can be started within 0.5 second when the temperature rise is greater than or the pressure suddenly changes, so that the well control risk is reduced.

The invention discloses a working temperature control method of a Josephson probe and a method for regulating and controlling the thickness of an Nb film, the working temperature of the Nb-based probe is increased to 7.2 K by regulating and controlling the film thickness parameter and controlling the working temperature of the probe, and the highest record of similar probes is created. According to the method for regulating and controlling the thickness of the Nb film, a four-groove quartz tube is selected as a substrate, and after ultrasonic cleaning, a nano needle tip is drawn by adopting a laser heating method, so that a needle tip structure with a clean surface and a controllable geometric structure is obtained; and horizontally fixing the prepared nano needle tip on a probe bracket, depositing a niobium film by adopting a magnetron sputtering process, and controlling the thickness of the Nb film to prepare the Josephson probe. According to the invention, the dependence of the probe on an extremely low temperature environment is obviously reduced, the limitation of the original process is broken, the available film thickness range is effectively widened, the preparation yield and the performance consistency of the probe are obviously improved, and a reliable device basis is provided for the practical development of near-field microwave imaging and quantum sensing technologies.

A substrate edge detection system including a substrate material having the substrate edge with a surface; a coating disposed on the surface of the substrate edge; a probe in operative communication with the coating and the substrate edge; and a controller in operative communication with the probe.

The invention relates to the technical field of brain imaging, in particular to a microwave imaging detection method and device based on a fusion algorithm, electronic equipment and a medium, and the method comprises the steps: S1, collecting actual microwave scattering electric field distribution; s2, inputting the acquired actual microwave scattering electric field distribution into a Born approximation algorithm model, and performing inversion to obtain a first brain foreign body initial imaging result; s3, inputting the first brain foreign body initial imaging result into a deep learning neural network model to obtain first microwave scattering electric field distribution; s4, inputting the first microwave scattering electric field distribution into the Born approximation algorithm model again to continue iterative calculation to obtain a second brain foreign body initial imaging result, and inputting the second brain foreign body initial imaging result into the deep learning neural network model again to obtain second microwave scattering electric field distribution; s5, the microwave scattering electric field distribution is continuously iteratively updated in the step S4 until the difference value between the updated microwave scattering electric field distribution and the actual microwave scattering electric field distribution is smaller than a preset threshold value, and at the moment, the brain foreign body initial imaging result corresponding to the updated microwave scattering electric field distribution is a high-resolution brain foreign body imaging result; and S6, further judging whether the brain foreign body exists or not according to the high-resolution brain foreign body imaging result. According to the method, the microwave signal features are automatically extracted by using the deep learning model, and fine physical modeling is performed through the Born iteration method, so that the accuracy and reliability of detection are remarkably improved.

The present invention relates to the fields of optical imaging, microwave imaging, radar detection, sonar, ultrasonic imaging, and target detection, imaging recognition, and wireless communication technologies based on acoustic, optical, and electrical media. Specifically, it relates to a method for rapid imaging of curved arrays and its applications in these fields. The method of the present invention enables rapid imaging of curved arrays and is applicable to various non-planar and conformal arrays, enabling rapid imaging and target detection. Furthermore, the method of the present invention has the advantages of good compatibility, low computational complexity, excellent imaging quality, and a wide range of applications.

This application discloses an imaging method, apparatus, storage medium, and electronic device. The method includes: transmitting pulse signals to an object to be imaged from multiple transmission positions, and converting the received multiple target echo pulse signals into corresponding multiple complex signals; acquiring the round-trip time of the pulse signal transmitted from each transmission position to each of the multiple imaging positions corresponding to the object to be imaged, thus obtaining multiple round-trip times corresponding to each imaging position; performing coherent accumulation processing on the multiple complex signals based on the multiple round-trip times corresponding to each imaging position, thus obtaining accumulated data corresponding to each imaging position; and performing imaging processing on the object to be imaged based on the accumulated data corresponding to each imaging position to obtain an image. This application can realize microwave imaging.

A microwave imaging radar sensor for creating an image of at least a part of its surrounding space includes at least one transmitter unit, a receiver unit and an evaluation unit having an output port to output an image connected to the transmitter and receiver units. The image has fields related to a pair of a transmit channel and a receive channel, where at least two transmit channels and at least two receive channels each correspond to a fan shaped beam having a first dimension (D1) which is significantly larger than and perpendicular to a second dimension (D2). The field is assigned to a radar result characteristic (RC) provided by the receive channel whose fan shaped receive beam overlaps with the fan shaped transmit beam of the transmit channel defining an overlap area. The transmit channel correlates with the transmitter unit, which comprises a refractive beamformer having a transmit reference plane to which the fan shaped transmit beams of the transmit channels are perpendicular with their first dimension (D1). The transmitter unit embodies transmit transition structures associated with the refractive beamformer at different transition positions, so that each transmit channel is related to at least one transmit transition structure. The receive channel correlates with the receiver unit that has a refractive beamformer having a receive reference plane to which the fan shaped receive beams of the receive channels are perpendicular with their first dimension (D1). The receiver unit includes receive transition structures associated with the refractive beamformer at different transition positions, so that each receive channel is related to at least one receive transition structure.

The invention relates to the technical field of space imaging, and provides a space target space-based microwave imaging system design method and device. The method comprises the following steps: firstly, determining an intersection process of an observation satellite and a space target based on an orbit dynamics simulation method, and further determining an imaging observation window; determining beam scanning geometry by combining relative motion characteristics of an observation satellite and a space target in the imaging observation window and the maximum scanning capability of the phased-array antenna, and generating a beam scanning strategy; secondly, realizing accurate capturing and locking of a wave beam by optimizing an orbit forecast error of a space target; and finally, according to the beam scanning strategy and the optimized orbit parameters of the space target, high-precision imaging of the space target is realized in combination with a synthetic aperture imaging algorithm and error compensation, double-high-speed motion imaging feasible position determination can be realized, a stable and efficient phased array beam scanning strategy is constructed, and the imaging accuracy is improved. High-precision beam pointing of a non-cooperative target is realized, and the precision and reliability of space target imaging are improved.

This invention relates to the field of microwave imaging technology and discloses a nonlinear depth-sensing microwave imaging method and system. The method transmits microwave signals to the area to be imaged via a transmitting antenna and receives the corresponding high-dimensional echo signals via a receiving antenna array. Then, a pre-defined target nonlinear depth-sensing sub-network adaptively compresses the high-dimensional echo signals into optimal low-dimensional nonlinear measurement values; the dimension of the low-dimensional nonlinear measurement values ​​is smaller than the dimension of the high-dimensional echo signals. Finally, a pre-defined target physical embedding reconstruction sub-network performs nonlinear inverse scattering on the low-dimensional nonlinear measurement values ​​to obtain a high-resolution image of the area to be imaged. By combining the advantages of physical laws and deep learning through the target nonlinear depth-sensing sub-network and the target physical embedding reconstruction sub-network, this method not only possesses strong generalization ability and is applicable to various practical application scenarios, but also can handle microwave imaging tasks in complex scenarios, achieving high-resolution imaging.

This application relates to the field of space imaging technology and provides a method for decoupling translational and rotational motion in space-based microwave imaging of space targets based on parameter estimation. The method first uses adjacent cross-correlation and self-focusing methods to perform preliminary compensation for the translational motion components of the microwave imaging echo data. Then, using the first-order translational motion parameters fitted by the former as initial values ​​and minimizing the image entropy of the echo data as the cost function, it combines Keystone transform to optimize and compensate for the translational linear phase components. Next, it uses Keystone transform to compensate for the spatially varied range cell migration caused by the rotational motion components. Finally, it performs a second compensation for the residual translational motion components, obtaining echo data after almost complete compensation of the translational and rotational MTRC. By performing spatially varied phase error compensation and azimuth compression on this data, the imaging result of the space target can be obtained. This method achieves a balance between the efficiency and accuracy of parameter estimation, effectively improving imaging quality.

The application discloses a super-structure surface based on a multi-unit periodic array distribution, the super-structure surface is mainly formed by a plurality of micro-structure units arranged periodically, each micro-structure unit comprises a sub-unit A1, a sub-unit B1, a sub-unit A2 and a sub-unit B2, wherein the sub-unit A1 and the sub-unit A2 are in a central symmetric structure, and the sub-unit B1 and the sub-unit B2 are in a central symmetric structure; a wave absorber formed by the super-structure surface comprises a plurality of periodically arranged wave absorption units, each wave absorption unit comprises, from bottom to top, a conductive reflection layer, a medium interlayer, a micro-structure unit layer and a medium top layer; the wave absorber can realize more than 90% electromagnetic wave absorption rate on a frequency band of 8.31-41.75 GHz, and ensures no electromagnetic wave transmission, so that most of electromagnetic wave energy entering the wave absorber is lost under the action of medium loss and ohmic loss; meanwhile, the wave absorber has the characteristics of flexibility, easy preparation, good wave absorption effect and facilitation of integration, and is suitable for technical fields of electromagnetic shielding and microwave imaging.

The invention relates to the technical field of space imaging, and provides a space target space-based microwave imaging parameter optimization method and device. According to the method, through predicting a target intersection section of a detection satellite and a space target, an average relative speed, a minimum intersection distance and an orbit prediction error component of the detection satellite and the space target are extracted from the target intersection section; determining the optimized detection time length and the optimized detection frequency of the detection satellite at least based on the minimum intersection distance and the orbit forecast error component, and determining the optimized imaging time length of the detection satellite at least based on the average relative speed and the minimum intersection distance, and multi-constraint cooperative solution is carried out on the pulse repetition frequency PRF of the detection satellite at least based on the average relative speed and the minimum intersection distance to obtain the optimized PRF, microwave imaging parameter optimization design of quantitative model and actual scene constraint is realized, the efficiency is high, the application scene is wide, and the method is suitable for large-scale popularization and application. And powerful support is provided for precision improvement and engineering landing of a space-based microwave imaging technology.

The invention discloses an in-orbit calibration method for correcting self-radiation of a heat mirror of a microwave imager based on reference radiation. The method comprises the following steps: calculating an included angle between the heat mirror of the microwave imager and the sun; calculating the earth observation brightness temperature of the microwave imager; calculating the observed brightness temperature of the reference microwave radiometer; simulation brightness temperature of the reference microwave radiometer and the microwave imager is obtained based on radiation transmission model simulation; calculating an observation brightness temperature deviation and a simulation brightness temperature deviation, and calculating a system error between the reference microwave radiometer and the microwave imager; based on the system error, the included angle between the microwave imager heat mirror and the sun is adopted for function relation fitting, and the heat mirror self-radiation brightness temperature of the reference microwave radiometer is calculated; the included angle between the microwave imager heat mirror and the sun is calculated on orbit in real time, and the earth observation brightness temperature of the microwave imager is corrected based on the self-radiation brightness temperature of the heat mirror. The self-radiation of the heat mirror is solved in real time by taking double deviations of observation brightness temperature and simulation brightness temperature as constraints, and the problem that the temperature of the heat mirror of the microwave imager cannot be actually measured in orbit is solved.

The application discloses a low cross-polarization Vivaldi antenna and belongs to the technical field of electromagnetic fields and antennas. The low cross-polarization Vivaldi antenna comprises a dielectric substrate, a pair of radiation arms and a balanced radiation arm are arranged on the dielectric substrate, and the pair of radiation arms and the balanced radiation arm are oppositely arranged. Metal through holes are formed in the dielectric substrate, and the pair of radiation arms and the balanced radiation arm are electrically connected through the metal through holes. A dielectric director is arranged on one side of the dielectric substrate, and a reflecting floor is arranged on the other side of the dielectric substrate. The dielectric director is used for adjusting the phase difference of electromagnetic waves at the opening of the Vivaldi antenna. The reflecting floor is used for improving the front-to-back ratio of electromagnetic waves. Electromagnetic waves are radiated from the reflecting floor to the direction of the dielectric director. The application further reduces the cross-polarization level of the Vivaldi antenna and can be applied to the fields of satellite communication, ground penetrating radar, microwave imaging and UWB ultra-wideband communication.

The application relates to the technical field of space imaging, and provides a space target space-based microwave imaging system design method and device. The method firstly determines the intersection course of an observation satellite and a space target based on an orbit dynamics simulation method, and then determines an imaging observation window; then, the relative motion characteristics of the observation satellite and the space target in the imaging observation window and the maximum scanning capability of a phased array antenna are combined to determine a beam scanning geometry and generate a beam scanning strategy; next, precise acquisition and locking of the beam are realized by optimizing the orbit prediction error of the space target; finally, high-precision imaging of the space target is realized by combining a synthetic aperture imaging algorithm and error compensation according to the beam scanning strategy and the optimized orbit parameters of the space target, double high-speed motion imaging feasible position determination is realized, a stable and efficient phased array beam scanning strategy is constructed, high-precision beam pointing of a non-cooperative target is realized, and the precision and reliability of space target imaging are improved.

The invention relates to a small broadband microwave anechoic chamber based on a non-uniform artificial surface, the small broadband microwave anechoic chamber comprises a 36-polygon cylindrical shell, a broadband artificial medium wave-absorbing unit and a transmitting antenna, the broadband artificial medium wave-absorbing unit is attached to the inner wall of the 36-polygon cylindrical shell, edges are uniformly arranged on the 36-polygon cylindrical shell at intervals along the perimeter direction of the outer side of the 36-polygon cylindrical shell, and the transmitting antenna is arranged on the outer side of the 36-polygon cylindrical shell. A transmitting antenna is attached between every two adjacent edges, and the transmitting antennas are microstrip patch antennas. The broadband artificial medium wave-absorbing unit can effectively absorb 8-12 GHz electromagnetic waves incident at 0-70 degrees, has the advantages of multiple angles, broadband and high absorptivity, and provides a high-quality low-reflection test environment for scenes such as antenna measurement and microwave imaging which have strict requirements on the electromagnetic environment; the device is small in size, compact in structure and easy to install and integrate, the used materials are common materials, large-scale expansion is easy, and the device has the advantages of being passive, easy to machine and low in cost.

The invention discloses an expanded random irradiation phase-free microwave imaging method for generative adversarial network augmentation. An echo measurement value is obtained according to scattered echo processing, a real backscattering coefficient is obtained according to target scatterer processing, and a microwave imaging data set is constructed by matching with a fixed observation matrix; inputting the microwave imaging data set into a random irradiation microwave imaging network to obtain a trained random irradiation microwave imaging network; and inputting an echo measurement value of a to-be-measured target and the observation matrix into the trained network to obtain a backscattering coefficient of the target scatterer, and constructing a target scatterer image. According to the invention, the initial value generated by the generative adversarial network with physical characteristics is obviously superior to the initial value generated by the traditional spectrum method in the aspect of iteration stability, and benefits from the high-dimensional input after feature enhancement and the screening capability of the gating module in the iteration process; and the gated recurrent neural network can be quickly and accurately solved by virtue of a small number of iterations, so that high-quality image reconstruction is realized.

The usage of microwave imaging for biomedical (BMWI) applications is still challenging due to the imprecise reconstruction of the relative permittivity of tissues and the ill-posed inverse scattering problem. Anomaly detection in biological tissues demand in-vivo, non-invasive, and non-contact measurements. Considering and proving the anomaly as a point object in the microwave imaging is erroneous and results in false implications about the anomaly's presence, location, and characteristics. Present disclosure provides systems and methods for anomaly detection in biological tissues. An intensity map of target region is generated to detect tumor. Area around the tumor is processed to obtain a refined image. As the tumor is embedded in tissues of higher dielectric constant, image thus formed is larger in size than actual tumor. An iterative numerical computation method is implemented to estimate relative permittivity. Subsequently, the effective size of the anomaly is approximately estimated, which is close to their actual values.

The present invention belongs to the technical field of digital image processing, and specifically relates to an intracranial microwave imaging method, device and storage medium with adaptive hierarchical confocal. When using antenna arrays with different numbers of antennas and antenna arrangement structures, the algorithm can adaptively optimize antenna selection, select the best calculated antenna pairs for imaging at different target positions, and achieve hierarchical imaging of the intracranial region; calculate the transmission time of the microwave signal emitted from antenna #imgabs0#, reflected at the target point #imgabs1# and received by antenna #imgabs2#, calculate the propagation speed of the signal in the skull, introduce a gain coefficient, perform time shift summation on the reflected signals received by different antenna pairs, reconstruct the relative gray-scale image of the target area, and detect the intracranial hemorrhage area. The present invention optimizes the imaging process by adaptively selecting antenna combinations, improves the algorithm performance, image quality and reduces the positioning error.

The invention relates to a wearable breast cancer intelligent screening system which comprises a wearable detection unit which is symmetrically designed on two sides, senses resistance change under the action of external force or pressure through an integrated flexible sensing film, collects voltage through a sampling chip, calculates resistance and sends the resistance to a main control processing unit; the main control processing unit obtains the resistance data, controls transmitting and receiving antenna pairs in the antenna array and measures S21 parameters of the transmitting and receiving antenna pairs; and the PC generates a mammary gland internal dielectric characteristic image without deformation errors through various algorithms, and screens the breast cancer according to the image. According to the method, the flexible sensing technology and the microwave imaging technology are deeply fused, so that real-time sensing and self-adaptive correction of the geometric attitude of the antenna array are realized, and the accuracy and repeatability of a detection result are ensured.

The invention discloses a pipeline deformation detection device combining microwave imaging with ray positioning and a use method, and relates to the technical field of pipeline deformation detection.The pipeline deformation detection device comprises a deformation positioning emitter and a positioning receiver which are connected with each other, the deformation positioning emitter is carried on a pipe cleaner in a target pipeline, and the positioning receiver is carried on a pipe cleaner in the target pipeline; wherein the deformation positioning transmitter is used for carrying out deformation monitoring along with the movement of the pipe cleaner in a target pipeline and obtaining a detection result, the detection result comprises abnormal deformation and normal deformation, and the deformation positioning transmitter is also used for transmitting the detection result and positioning information of the detection result to the positioning receiver when the detection result is abnormal deformation; the positioning receiver is used for receiving the detection result and the positioning information, acquiring the deformation information from the detection result and acquiring the earth surface position from the positioning information; the deformation positioning emitter comprises a microwave imager, a controller, an electromagnetic generator and a ray generator, and the microwave imager, the electromagnetic generator and the ray generator are all connected with the controller; the problems that according to an existing diameter measuring plate method, self-deformation is generated due to collision, the pipe wall is damaged, and positioning of the pipeline deformation position is not accurate enough are solved.

The invention belongs to the technical field of medical rehabilitation assessment, and provides a urinary surgery postoperative wound rehabilitation assessment method based on artificial intelligence, electronic equipment and a storage medium. The method comprises the steps of multi-source data acquisition, data preprocessing, spatial alignment, normalization processing, three-branch network feature extraction, feature integration, feature compression, feature mapping and wound rehabilitation grade matching. Through three-mode objective data of microwave imaging, electrical impedance imaging and bioelectrical impedance, the whole data acquisition process is free of invasion and interference, and errors caused by individual differences are reduced; through a three-branch feature extraction network and a deep fusion process, different types of data characteristics are adapted, cross-modal information complementation is realized, and wound rehabilitation multi-dimensional key signals are captured.

This invention relates to a miniature dual-frequency microwave anechoic chamber based on spatially distributed ultrathin absorbing materials. It includes a rigid cylindrical shell mounted on a support. An ultrathin dual-frequency electromagnetic wave absorbing unit and a transmitting antenna are attached to the inner wall of the rigid cylindrical shell. The ultrathin dual-frequency electromagnetic wave absorbing unit and the transmitting antenna are integrally formed, and the transmitting antenna is a microstrip patch antenna. This invention, through research on spatially distributed ultrathin electromagnetic wave absorbing materials, realizes a wavelength-scale miniature dual-frequency microwave anechoic chamber. The shape and size of the microwave anechoic chamber can be customized according to actual application requirements, and it is expected to be widely used in antenna measurement, microwave imaging, and other fields. This invention features low cost, simple construction, and portability.

There is a need to address the problem of compressed scanning in SAR acquisitions for microwave imaging. Embodiments of the present disclosure provide microwave imaging with multiple-input and multiple-output synthetic aperture radar using compressed multi-coset range migration technique. The present disclosure reduces the SAR acquisition time by compressed scanning, where a compressed scanning acquisition setup captures radar measurements to obtain a microwave image of a target scene by intermittently skipping blocks during SAR acquisition. Further, reconstruction of a microwave image of a target scene is performed using 2D Fourier Transform (FT) of the radar measurements based on a multi-coset range-migration framework. The multi-coset range migration framework makes use of intermittent scanning and formulates a compressed sensing-based architecture by leveraging block-sparsity constraints. Subsequently, a denoising convolutional neural network (DnCNN) is used to enhance and denoise the reconstructed microwave image to obtain a high-resolution image of the target scene.

The embodiment of the invention provides a microwave hyperthermia device for noninvasive measurement of tumor body temperature, and the device comprises a solid-state microwave source, and the bottom of one end of the solid-state microwave source is provided with a connector in an embedded manner; the microwave conduction device is fixedly installed in the connector, a treatment application device is installed at the bottom end of the microwave conduction device, and the treatment application device is connected with the solid-state microwave source through the microwave conduction device and the connector; the detection frame is fixedly mounted on one side of the solid-state microwave source, a plurality of microwave imaging devices are mounted in the detection frame, each microwave imaging device comprises a mounting seat, a microwave emission head and a receiving probe, the mounting seat is fixedly mounted in the detection frame, the microwave emission head is mounted at one end of the mounting seat in an embedded manner, and the receiving probe is mounted at the other end of the mounting seat. The microwave imaging device is adopted to carry out non-contact imaging scanning and temperature measurement on a focus, temperature distribution data images of the surface and the interior of a tumor are directly obtained, and accurate tumor positioning is achieved by fusing the temperature distribution data images with CT and nuclear magnetic resonance examination results.

This invention relates to the field of microwave power imaging technology, specifically to a power imaging method for high-power microwaves based on solid-state quantum spin. To address the problem of existing technologies' difficulty in achieving power imaging of high-power microwaves based on solid-state quantum spin, this invention provides a novel power imaging method for high-power microwaves based on solid-state quantum spin, comprising the following steps: 1) introducing local homologous microwaves; 2) obtaining correlated microwaves; 3) obtaining ODMR curves; 4) calculating the correlated microwave power; 5) inversely calculating the power of the microwave to be measured to obtain an image of the power of the microwave to be measured. The imaging method of this invention reduces microwave power by introducing correlated microwaves, effectively controlling the saturation effect of the full width at half maximum (FWHM) of the ODMR curve resonance peak caused by excessively high microwave power during fixed quantum spin microwave imaging detection, thereby achieving power imaging of high-power microwaves based on solid-state quantum spin.

The application relates to the field of magnetic confinement nuclear fusion tokamak physics research, in particular to a microwave imaging system and a measuring method for measuring the two-dimensional structure of instability, the system comprising a focusing assembly, a local oscillator link, a first power divider, a mixing link, a second power divider and an intermediate frequency link, the focusing assembly performing focusing and high-pass filtering on an electron cyclotron radiation signal emitted by plasma; the local oscillator link generates a local oscillator signal which is distributed to multiple mixing links through the first power divider; the mixing link receives the signal processed by the focusing assembly through a horn antenna, mixes the signal with the local oscillator signal, and then transmits the mixed signal to the intermediate frequency link; the intermediate frequency link performs filtering, detection and amplification processing on the mixed signal; the measuring method calculates the relative change amount of each channel signal, performs band-pass filtering and two-dimensional pseudo-color drawing, combines time delay correlation analysis and Gaussian fitting, and obtains the poloidal and radial correlation lengths and propagation speed of instability.

A microwave imaging radar sensor (10) for generating an image of at least a portion of its surrounding space wherein the sensor (10) comprises at least one transmitting unit (12), a receiving unit (14) and an evaluation unit (15). The evaluation unit (15) has an output port (38) for outputting an image and is connected to the transmitting unit (12) and the receiving unit (14). The image comprises a plurality of regions associated with pairs of transmit channels (TX.X) and receive channels (RX.X), where at least two transmit channels (TX.X) and at least two receive channels (RX.X) correspond to fan beams (BT.X, BR.X). The fan beam has a first dimension (D1) substantially greater than a second dimension (D2), and the first dimension (D1) is perpendicular to the second dimension (D2). The area is assigned to a radar result characteristic (RC) provided by the receiving channel (RX.X), the fan-shaped receiving beam (BR.X) of the receiving channel (RX.X) overlapping with the fan-shaped transmitting beam (BT.X) of the transmitting channel (TX.X) to define an overlapping area (OA, OA.X).