A new type of microwave three-dimensional imaging array device

Abstract

The present invention relates to a novel microwave three-dimensional imaging array device, comprising: at least two transmitting antennas for transmitting microwave signals, at least two receiving antennas for receiving echoes, and a three-dimensional radar feeding network for respectively controlling each of the transmitting antennas and each of the receiving antennas to form different array combinations. The three-dimensional radar feeding network selects the corresponding array according to the total strength of the actual signal to be transmitted. When the three-dimensional radar feeding network sets the array as a time division multiplexing array, the three-dimensional radar feeding network selects the corresponding array shape according to the number of the transmitting antennas and the number of the receiving antennas. The present invention can effectively improve the working efficiency of the device and enhance the imaging accuracy and resolution through the flexible use of different antenna array structures and sizes. At the same time, the imaging device has a wider range of applications and more fields.

Description

Technical Field

[0001] The invention relates to the technical field of microwave three-dimensional imaging, and in particular to a novel microwave three-dimensional imaging array device. Background Art

[0002] The performance of the microwave three-dimensional imaging single-device single-transmitting and receiving antenna solution is affected by the performance of the configured transceiver antenna (such as gain, radiation range, etc.). It can realize basic ranging, vital sign detection and material analysis functions, but without the help of other auxiliary tools, it cannot effectively take into account the positioning and tracking functions, as well as the imaging function that is the most advantageous of ultra-wideband sensing technology.

[0003] Although the microwave three-dimensional imaging multi-device single transceiver antenna solution can be used in positioning and tracking applications, it requires multiple devices to operate simultaneously, and the synchronization and communication of multiple devices are difficult. Summary of the invention

[0004] To this end, the present invention provides a novel microwave three-dimensional imaging array device to overcome the problem of difficulty in synchronization and communication of multiple devices in the prior art.

[0005] To achieve the above-mentioned object, the present invention provides a novel microwave three-dimensional imaging array device, comprising: at least two transmitting antennas for transmitting microwave signals, at least two receiving antennas for receiving ultra-wideband echoes, and a three-dimensional radar feeding network for respectively controlling the transmitting antennas and the receiving antennas to form different array combinations, wherein the three-dimensional radar feeding network selects a corresponding array according to the actual total intensity of the ultra-wideband to be transmitted, when the three-dimensional radar feeding network sets the array as a time division multiplexing array, the three-dimensional radar feeding network selects a corresponding array shape according to the number of the transmitting antennas and the number of the receiving antennas, and when the three-dimensional radar feeding network sets the array as a multi-channel array, the three-dimensional radar feeding network corrects the number of transmitting antennas that simultaneously transmit wideband signals according to the actual total intensity of the echoes.

[0006] Furthermore, when the three-dimensional radar feed network selects an array shape, the three-dimensional radar feed network obtains an actual ultra-wideband total intensity Qa of the ultra-wideband to be transmitted, and sequentially compares the actual ultra-wideband total intensity Qa with the maximum value Qmax of the ultra-wideband intensity transmitted by each transmitting antenna to select a corresponding array shape;

[0007] When Qa≤Qmax, the three-dimensional radar feeding network sets the array as a time division multiplexing array;

[0008] When Qa>Qmax, the three-dimensional radar feed network sets the array into a multi-channel array.

[0009] Further, when the three-dimensional radar feed network sets the array shape to a time division multiplexing array, the three-dimensional radar feed network selects a corresponding array shape according to the number M of the transmitting antennas and the number N of the receiving antennas;

[0010] When M=N, the three-dimensional radar feeding network sets the array shape so that one transmitting antenna corresponds to one receiving antenna, and synchronously controls the transmitting antenna and the receiving antenna to work in time-sharing at a first preset time interval Ta;

[0011] When M≠N, the three-dimensional radar feeding network sets the array shape so that one transmitting antenna corresponds to multiple receiving antennas, and when controlling the transmitting antenna to transmit an ultra-wideband, the three-dimensional radar feeding network controls the multiple receiving antennas to work in time-sharing at a second preset time interval Tb.

[0012] Furthermore, when the three-dimensional radar feed network controls multiple receiving antennas to work in time-sharing mode, the three-dimensional radar feed network obtains the actual echo time T, and corrects the second preset time interval Tb according to the actual echo time T. The three-dimensional radar feed network records the corrected second preset time interval as Tb1, and sets Tb1=Tbⅹ(T / Tb).

[0013] Furthermore, the three-dimensional radar feed network is also provided with a second preset time interval minimum value Tbmin. When the three-dimensional radar feed network compares the corrected second preset time interval Tb1 with the second preset time interval minimum value Tbmin, when Tb1≥Tbmin, the three-dimensional radar feed network corrects the second preset time interval to Tb1. When Tb1<Tbmin, the three-dimensional radar feed network corrects the number of the receiving antennas and does not correct the second preset time interval. The three-dimensional radar feed network records the corrected number of receiving antennas as N1, sets N1=N×(1+Tbmin / Tb), and when N1 is not an integer, rounds up.

[0014] Further, when the three-dimensional radar feeding network sets the array shape to a multi-channel array, the three-dimensional radar feeding network obtains the actual total echo intensity Qb received by the receiving antenna, and corrects the number of transmitting antennas that simultaneously transmit ultra-wideband according to the actual total echo intensity. The three-dimensional radar feeding network records the corrected number of transmitting antennas as M1, and sets M1=M0×(Qb / Q0), wherein M0 is the preset number of transmitting antennas that simultaneously transmit ultra-wideband, and Q0 is the preset total echo intensity.

[0015] Furthermore, the array shape also includes an orthogonal antenna array, wherein the number of transmitting antennas in the orthogonal antenna array is four, and the angle between each transmitting antenna is 90°.

[0016] Furthermore, it also includes a rotating element, which is used to drive the transmitting antenna to rotate, and the number of the rotating elements is the same as the number of the transmitting antennas.

[0017] Further, each edge of each transmitting antenna is aligned with an edge of an adjacent rotating element.

[0018] Furthermore, it is characterized in that the ultra-wideband transmission mode of the transmitting antenna is end-fire or side-fire.

[0019] Compared with the prior art, the beneficial effect of the present invention is that the novel microwave three-dimensional imaging array device proposed by the present invention can realize basic ranging, vital sign detection, material analysis and other functions through a single device with multiple transmitting and receiving antenna structures, including a three-dimensional radar feed network, at least two transmitting antennas and at least two receiving antennas, and can also realize the positioning and tracking functions of a single device with multiple antennas, as well as perspective and imaging functions without the need for other auxiliary tools and without increasing the space occupied by the device. On the one hand, the space occupied by the device can be reduced, and different arrays can be selected according to actual conditions through the three-dimensional radar feed network, which can also effectively improve the working efficiency of the device and enhance the accuracy and resolution of positioning, tracking and imaging. On the other hand, the three-dimensional radar feed network of the present invention controls the switching, switching and feeding of the transmitting antenna and the receiving antenna, and cooperates with the flexible use of different types and different antenna array structures and sizes, which effectively improves the working efficiency of the device, enhances the accuracy and resolution of positioning, tracking and imaging, and makes the application range of the sensor wider and more fields.

[0020] Furthermore, when the three-dimensional radar feed network of the present invention selects the corresponding array, the three-dimensional radar feed network selects the corresponding array by obtaining the actual total intensity of the ultra-wideband to be transmitted. When the actual total intensity of the ultra-wideband to be transmitted is greater than the maximum intensity of the ultra-wideband that can be transmitted by a single transmitting antenna, the three-dimensional radar feed network determines that it cannot control the single transmitting antenna to work. The three-dimensional radar feed network is set as a multi-channel array through the array to simultaneously control multiple transmitting antennas to transmit. When the actual total intensity of the ultra-wideband to be transmitted is less than or equal to the maximum intensity of the ultra-wideband that can be transmitted by a single transmitting antenna, the three-dimensional radar feed network controls a single transmitting antenna to work, and the three-dimensional radar feed network is set as a time division multiplexing array through the array to simultaneously control a single transmitting antenna to transmit. As a result, the three-dimensional radar feed network selects different arrays according to actual conditions to effectively improve the working efficiency of the device and enhance the accuracy and resolution of positioning, tracking and imaging.

[0021] Furthermore, when the three-dimensional radar feed network of the present invention sets the array as a time-division multiplexing array, the three-dimensional radar feed network determines the array shape by comparing the number of actual transmitting antennas and receiving antennas. When the number of transmitting antennas and receiving antennas is the same, the three-dimensional radar feed network groups the transmitting antennas and receiving antennas, wherein the number of transmitting antennas in each group is the same as the number of receiving antennas, and the three-dimensional radar feed network performs time-sharing operation by controlling each group. When the number of transmitting antennas is different from that of receiving antennas, the three-dimensional radar feed network performs time-sharing operation by controlling the receiving antennas. Furthermore, the three-dimensional radar feed network controls the switching, switching and feeding of the transmitting antennas and receiving antennas, and cooperates with the flexible use of different types, antenna array structures and sizes, so as to effectively improve the working efficiency of the device, enhance the accuracy and resolution of positioning, tracking and imaging, and make the application range of the sensor wider and more fields.

[0022] Furthermore, the three-dimensional radar feed network of the present invention corrects the working time interval of each receiving antenna by the actual echo time. When the echo time is short, the working time interval of each receiving antenna is reduced to ensure that the receiving antenna works efficiently. Furthermore, the three-dimensional radar feed network controls the switching, switching and feeding of the transmitting antenna and the receiving antenna, and cooperates with the flexible use of different types, different antenna array structures and sizes, which can effectively improve the working efficiency of the device, enhance the accuracy and resolution of positioning tracking and imaging, and make the application range of the sensor wider and more fields.

[0023] Furthermore, the three-dimensional radar feed network of the present invention also sets a minimum working time interval of the receiving antenna. When the corrected working time interval of the receiving antenna is less than the minimum value, the number of receiving antennas is increased to ensure the working efficiency of the device. Furthermore, the three-dimensional radar feed network can effectively improve the working efficiency of the device and enhance the accuracy and resolution of positioning, tracking and imaging while making the application range of the sensor wider and more fields by controlling the switching, switching and feeding of the transmitting antenna and the receiving antenna, and coordinating the flexible use of different types, antenna array structures and sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic structural diagram of the novel microwave three-dimensional imaging array device of the present invention;

[0025] Figure 2 This is a schematic diagram of a time-division multiplexing array of the novel microwave three-dimensional imaging array device described in the present invention. DETAILED DESCRIPTION

[0026] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0027] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0028] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0029] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] See also Figure 1 As shown, the structural schematic diagram of the novel microwave three-dimensional imaging array device provided by an embodiment of the present invention includes: at least two transmitting antennas for transmitting microwave signals, at least two receiving antennas for receiving ultra-wideband echoes, and a three-dimensional radar feeding network for respectively controlling each of the transmitting antennas and each of the receiving antennas to form different array combinations, wherein the three-dimensional radar feeding network selects the corresponding array according to the actual total intensity of the ultra-wideband to be transmitted, when the three-dimensional radar feeding network sets the array as a time-division multiplexing array, the three-dimensional radar feeding network selects the corresponding array shape according to the number of the transmitting antennas and the number of the receiving antennas, and when the three-dimensional radar feeding network sets the array as a multi-channel array, the three-dimensional radar feeding network corrects the number of transmitting antennas that simultaneously transmit the ultra-wideband according to the actual total intensity of the echo.

[0031] Specifically, in order to match the distribution and configuration of different antenna arrays, the three-dimensional radar feed network proposed in the present invention has three typical working modes that can be freely selected and configured, including time division multiplexing array, multi-channel array, orthogonal antenna array, etc. The ultra-wideband transmitting and receiving antenna proposed in the present invention can operate at a bandwidth of up to 10 GHz, using end-fire or side-fire radiation mode, which is convenient for forming an array of a specific structure and used in conjunction with a three-dimensional radar feed network to meet different application scenarios.

[0032] Specifically, the novel microwave three-dimensional imaging array device proposed in the embodiment of the present invention can realize basic ranging, vital sign detection, material analysis and other functions through a single device with multiple transmitting and receiving antenna structures, including a three-dimensional radar feed network, at least two transmitting antennas and at least two receiving antennas, and can also realize the positioning and tracking functions of a single device with multiple antennas, as well as perspective and imaging functions without the need for other auxiliary tools and without increasing the space occupied by the device. On the one hand, the space occupied by the device can be reduced, and different arrays can be selected according to actual conditions through the three-dimensional radar feed network, which can also effectively improve the working efficiency of the device and enhance the accuracy and resolution of positioning, tracking and imaging. On the other hand, the three-dimensional radar feed network of the present invention controls the switching, switching and feeding of the transmitting antenna and the receiving antenna, and cooperates with the flexible use of different types and antenna array structures and sizes, which effectively improves the working efficiency of the device, enhances the accuracy and resolution of positioning, tracking and imaging, and makes the application range of the sensor wider and more fields.

[0033] Please continue to refer to Figure 2, which is a schematic diagram of the time-division multiplexing array of the novel microwave three-dimensional imaging array device provided in an embodiment of the present invention. In the time-division multiplexing array, M ultra-wideband transmitting antennas and N ultra-wideband receiving antennas work in time-sharing. If M=N, the three-dimensional radar feed network synchronously controls each group of transmitting and receiving antennas to work in time-sharing. Specifically, those skilled in the art can realize single-device positioning and tracking according to the actual antenna position differences, in conjunction with the positioning and tracking algorithms, thereby effectively saving device space and increasing the precision and accuracy of positioning. Please continue to refer to Figure 2 As shown, the M transmitting antennas and N receiving antennas may not be allocated in groups. When any transmitting antenna transmits in time-sharing mode, all receiving antennas receive in time-sharing mode. This implementation method can increase the combination of transmitting and receiving antenna arrays, provide sufficient imaging aperture, and realize trackless imaging of a single device without the need for auxiliary configuration, thereby reducing the cost of the imaging device. In this embodiment, the 4-transmitting and 4-receiving antenna combination with M=N=4 is designed by changing the design of the three-dimensional radar feed network so that when the transmitting antenna T1 transmits, the receiving antennas R1 to R4 receive in time-sharing mode at the second preset time interval Tb, and then transmit through the transmitting antenna T2, and the receiving antennas R1 to R4 receive in time-sharing mode at the second preset time interval Tb, and so on, and T1 to T4 transmit in time-sharing mode.

[0034] Specifically, when the three-dimensional radar feed network selects the array shape, the three-dimensional radar feed network obtains the actual ultra-wideband total intensity Qa of the ultra-wideband to be transmitted, and compares the actual ultra-wideband total intensity Qa with the maximum value Qmax of the ultra-wideband intensity transmitted by each transmitting antenna in turn to select the corresponding array shape as follows:

[0035] When Qa≤Qmax, the three-dimensional radar feeding network sets the array as a time division multiplexing array;

[0036] When Qa>Qmax, the three-dimensional radar feed network sets the array into a multi-channel array.

[0037] Specifically, when the three-dimensional radar feed network of the embodiment of the present invention selects the corresponding array, the three-dimensional radar feed network obtains the actual total intensity of the ultra-wideband to be transmitted to select the corresponding array: when the actual total intensity of the ultra-wideband to be transmitted is greater than the maximum intensity of the ultra-wideband that can be transmitted by a single transmitting antenna, the three-dimensional radar feed network determines that it cannot control the single transmitting antenna to work, and the three-dimensional radar feed network is set as a multi-channel array through the array to control multiple transmitting antennas to transmit at the same time; when the actual total intensity of the ultra-wideband to be transmitted is less than or equal to the maximum intensity of the ultra-wideband that can be transmitted by a single transmitting antenna, the three-dimensional radar feed network controls a single transmitting antenna to work, and the three-dimensional radar feed network is set as a time division multiplexing array through the array to control a single transmitting antenna to transmit at the same time. Furthermore, the three-dimensional radar feed network selects different arrays according to actual conditions to effectively improve the working efficiency of the device and enhance the accuracy and resolution of positioning, tracking and imaging.

[0038] Specifically, in the embodiment of the present invention, the multi-channel array supports multi-channel simultaneous transmission and reception, and the array selection control mode supports the selection of M'(≤M) and N'(≤N) numbers and combinations of transceiver channels, and configures N' receiving channels and digital-to-analog conversion modules. In turn, it can support multi-channel simultaneous transmission or simultaneous reception, so that more efficient and high-precision positioning and imaging can be achieved, saving device operation time.

[0039] Specifically, when the three-dimensional radar feed network sets the array shape to a time division multiplexing array, the three-dimensional radar feed network selects the corresponding array shape according to the number M of the transmitting antennas and the number N of the receiving antennas as follows:

[0040] When M=N, the three-dimensional radar feeding network sets the array shape so that one transmitting antenna corresponds to one receiving antenna, and synchronously controls the transmitting antenna and the receiving antenna to work in time-sharing at a first preset time interval Ta;

[0041] When M≠N, the three-dimensional radar feeding network sets the array shape so that one transmitting antenna corresponds to multiple receiving antennas, and when controlling the transmitting antenna to transmit an ultra-wideband, the three-dimensional radar feeding network controls the multiple receiving antennas to work in time-sharing at a second preset time interval Tb.

[0042] Specifically, when the three-dimensional radar feed network of the embodiment of the present invention sets the array as a time-division multiplexing array, the three-dimensional radar feed network determines the array shape by comparing the number of actual transmitting antennas and receiving antennas. When the number of transmitting antennas and receiving antennas is the same, the three-dimensional radar feed network groups the transmitting antennas and receiving antennas; wherein the number of transmitting antennas in each group is the same as the number of receiving antennas, and the three-dimensional radar feed network performs time-sharing work by controlling each group. When the number of transmitting antennas is different from that of receiving antennas, the three-dimensional radar feed network performs time-sharing work by controlling the receiving antennas. Furthermore, the three-dimensional radar feed network controls the switching, switching and feeding of the transmitting antennas and receiving antennas, and cooperates with the flexible use of different types, different antenna array structures and sizes, which can effectively improve the working efficiency of the device, enhance the accuracy and resolution of positioning tracking and imaging, and make the application range of the sensor wider and more fields.

[0043] Specifically, when the three-dimensional radar feed network controls multiple receiving antennas to work in time-sharing mode, the three-dimensional radar feed network obtains the actual echo time T, and corrects the second preset time interval Tb according to the actual echo time T. The three-dimensional radar feed network records the corrected second preset time interval as Tb1, and sets Tb1=Tbx(T / Tb), where the number of receiving antennas N≥3.

[0044] Specifically, the three-dimensional radar feed network of the embodiment of the present invention corrects the working time interval of each receiving antenna through the actual echo time. When the echo time is short, the working time interval of each receiving antenna is reduced to ensure that the receiving antenna works efficiently, and then the three-dimensional radar feed network controls the switching, switching and feeding of the transmitting antenna and the receiving antenna. With the flexible use of different types, different antenna array structures and sizes, the working efficiency of the device can be effectively improved, and the accuracy and resolution of positioning tracking and imaging can be enhanced, making the application range of the sensor wider and more fields.

[0045] Specifically, the three-dimensional radar feed network is also provided with a second preset time interval minimum value Tbmin. When the three-dimensional radar feed network compares the corrected second preset time interval Tb1 with the second preset time interval minimum value Tbmin: when Tb1≥Tbmin, the three-dimensional radar feed network corrects the second preset time interval to Tb1; when Tb1<Tbmin, the three-dimensional radar feed network corrects the number of the receiving antennas and does not correct the second preset time interval. The three-dimensional radar feed network records the corrected number of receiving antennas as N1, sets N1=N×(1+Tbmin / Tb), and when N1 is not an integer, rounds up.

[0046] Specifically, the three-dimensional radar feed network of the embodiment of the present invention also sets a minimum working time interval of the receiving antenna. When the corrected working time interval of the receiving antenna is less than the minimum value, the number of receiving antennas is increased to ensure the working efficiency of the device. Then, the three-dimensional radar feed network controls the switching, switching and feeding of the transmitting antenna and the receiving antenna, and cooperates with the flexible use of different types, different antenna array structures and sizes, which can effectively improve the working efficiency of the device, enhance the accuracy and resolution of positioning tracking and imaging, and make the application range of the sensor wider and more fields.

[0047] Specifically, when the three-dimensional radar feed network sets the array shape to a multi-channel array, the three-dimensional radar feed network obtains the actual total echo intensity Qb received by the receiving antenna, and corrects the number of transmitting antennas that simultaneously transmit ultra-wideband according to the actual total echo intensity. The three-dimensional radar feed network records the corrected number of transmitting antennas as M1, and sets M1=M0×(Qb / Q0), where M0 is the number of transmitting antennas that are preset to simultaneously transmit ultra-wideband, and Q0 is the preset total echo intensity.

[0048] Specifically, the array shape also includes an orthogonal antenna array, wherein the number of the transmitting antennas in the orthogonal antenna array is four, and the angle between each of the transmitting antennas is 90°.

[0049] Specifically, the orthogonal antenna array of the embodiment of the present invention is implemented by feeding the output of the feeding network to four identical opposite antenna arrays, which are rotated 90° in turn to radiate circularly polarized signals. Each edge of the antenna is aligned with the edge of its adjacent rotating element. Specifically, left circular polarization (LHCP) radiation is achieved by feeding the advanced phase output (270°) of the three-dimensional radar feeding network to the left unit relative to the top unit to which the 0° output is fed. The remaining three-dimensional radar feed network output ports are respectively fed to the antenna units that rotate in turn. The isolation port is connected to a 50 ohm load. The orthogonal antenna array is used in high-resolution ground penetration sensing and material characterization, etc., and it can receive reflected waves from multiple scatterers, improve the working efficiency of the device, and enhance the accuracy and resolution of positioning tracking and imaging.

[0050] Specifically, it also includes a rotating element, which is used to drive the transmitting antenna to rotate, and the number of the rotating elements is the same as the number of the transmitting antennas.

[0051] Specifically, each edge of each of the transmitting antennas is aligned with an edge of an adjacent rotating element.

[0052] Specifically, the transmitting antenna transmits the ultra-wideband in an end-fire or side-fire manner.

[0053] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A novel microwave three-dimensional imaging array device, characterized in that: include: At least two transmitting antennas for transmitting microwave signals, at least two or more receiving antennas for receiving ultra-wideband echo signals, and a three-dimensional radar feed network for respectively controlling the transmitting antennas and the receiving antennas to form different array combinations, wherein the three-dimensional radar feed network selects a corresponding array according to the total strength of the actual signal to be transmitted, when the three-dimensional radar feed network sets the array as a time division multiplexing array, the three-dimensional radar feed network selects a corresponding array shape according to the number of the transmitting antennas and the number of the receiving antennas, and when the three-dimensional radar feed network sets the array as a multi-channel array, the three-dimensional radar feed network corrects the number of transmitting antennas transmitting simultaneously according to the total strength of the actual echo; When the three-dimensional radar feed network selects an array shape, the three-dimensional radar feed network obtains the actual total signal strength Qa to be transmitted, and compares the actual total signal strength Qa with the maximum value Qmax of the transmitted signal strength of each transmitting antenna in turn to select the corresponding array shape; When Qa≤Qmax, the three-dimensional radar feeding network sets the array as a time division multiplexing array; When Qa>Qmax, the three-dimensional radar feed network sets the array to a multi-channel array; When the three-dimensional radar feed network sets the array shape to a time division multiplexing array, the three-dimensional radar feed network selects a corresponding array shape according to the number M of the transmitting antennas and the number N of the receiving antennas; When M=N, the three-dimensional radar feeding network sets the array shape so that one transmitting antenna corresponds to one receiving antenna, and synchronously controls the transmitting antenna and the receiving antenna to work in time-sharing at a first preset time interval Ta; When M≠N, the three-dimensional radar feed network sets the array shape so that one transmitting antenna corresponds to a plurality of receiving antennas, and when controlling the transmitting antenna to transmit an ultra-wideband, the three-dimensional radar feed network controls the plurality of receiving antennas to perform time-sharing operation at a second preset time interval Tb; When the three-dimensional radar feed network controls the multiple receiving antennas to work in time-sharing mode, the three-dimensional radar feed network obtains an actual echo time T, and corrects the second preset time interval Tb according to the actual echo time T, and the three-dimensional radar feed network records the corrected second preset time interval as Tb1; The three-dimensional radar feed network is also provided with a second preset time interval minimum value Tbmin. When the three-dimensional radar feed network compares the corrected second preset time interval Tb1 with the second preset time interval minimum value Tbmin, when Tb1≥Tbmin, the three-dimensional radar feed network corrects the second preset time interval to Tb1. When Tb1<Tbmin, the three-dimensional radar feed network corrects the number of the receiving antennas and does not correct the second preset time interval. The three-dimensional radar feed network records the corrected number of receiving antennas as N1, sets N1=Nx(1+Tbmin / Tb), and when N1 is not an integer, rounds up.

2. The novel microwave three-dimensional imaging array device according to claim 1 is characterized in that: When the three-dimensional radar feeding network sets the array shape to a multi-channel array, the three-dimensional radar feeding network obtains the actual total echo intensity Qb received by the receiving antenna, and corrects the number of transmitting antennas that simultaneously transmit ultra-wideband according to the actual total echo intensity. The three-dimensional radar feeding network records the corrected number of transmitting antennas as M1, and sets M1=M0×(Qb / Q0), where M0 is the preset number of transmitting antennas that simultaneously transmit ultra-wideband, and Q0 is the preset total echo intensity.

3. The novel microwave three-dimensional imaging array device according to claim 1 is characterized in that: The array shape also includes an orthogonal antenna array, wherein the number of the transmitting antennas in the orthogonal antenna array is four, and the angle between each of the transmitting antennas is 90°.

4. The novel microwave three-dimensional imaging array device according to claim 3 is characterized in that: The invention also includes a rotating element, wherein the rotating element is used to drive the transmitting antenna to rotate, and the number of the rotating elements is the same as the number of the transmitting antennas.

5. The novel microwave three-dimensional imaging array device according to claim 4 is characterized in that: Each edge of each of the transmitting antennas is aligned with an adjacent edge of the rotating element.

6. The novel microwave three-dimensional imaging array device according to any one of claims 1 to 5, characterized in that: The transmitting antenna transmits the ultra-wideband in an end-fire or side-fire manner.

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