Ultra-wideband radar antenna device and human body monitoring system

Abstract

The utility model provides an ultra wide band radar antenna device and a human body monitoring system, the antenna device comprises an antenna unit array and a power divider circuit, the antenna unit array comprises a plurality of antenna units arranged in an array; the antenna unit comprises a feed column, a first radiator provided with a first via hole, and a second radiator sleeved with the feed column; the second radiator and the first radiator are positioned on the same plane; the power divider is in line connection with the feed column, and the second radiator sleeved on the feed column is in coupling connection with the first radiator through the first via hole. The first radiating body is not directly connected with the feed column, but forms a coupling effect with the second radiating body sleeved on the feed column through a certain gap, so that the bandwidth of the antenna can be increased, the antenna is convenient to adjust, the performance of the antenna is remarkably improved, and the requirements of various monitoring environments can be met to a great extent.

Description

Technical Field

[0001] The utility model relates to the technical field of ultra-wideband radar, in particular to an ultra-wideband radar antenna device and a human body monitoring system. Background Art

[0002] As a time-domain imaging detection system working in a carrier-free nanosecond pulse system, ultra-wideband pulse radar involves various disciplines and technologies, such as ultra-wideband antenna technology, transient signal detection and processing technology, etc. It is currently widely used in various monitoring environments, such as drone radar inspections and vehicle-mounted living motion detection.

[0003] Regardless of which of the above-mentioned monitoring environments it is applied to, the role of ultra-wideband radar antennas cannot be ignored. For example, for drone radar inspections, the antenna on the drone needs to point to the ground to image the area directly below. For vehicle-mounted liveness detection, the movement characteristics of liveness can be detected within the radiation range of the antenna.

[0004] However, the existing ultra-wideband radar antennas have poor antenna performance due to their own defects, and thus cannot adapt well to the needs of the above-mentioned various monitoring environments. Utility Model Content

[0005] The embodiments of the utility model at least provide an ultra-wideband radar antenna device and a human body monitoring system to improve antenna performance and thus meet the needs of various monitoring environments.

[0006] In a first aspect, an embodiment of the utility model provides an ultra-wideband radar antenna device, comprising: an antenna unit array, and a power divider circuit, wherein the antenna unit array comprises a plurality of antenna units arranged in an array;

[0007] The antenna unit comprises a feeding post, a first radiator provided with a first via hole, and a second radiator sleeved with the feeding post; the second radiator and the first radiator are in the same plane;

[0008] The power divider circuit is connected to the feeding column, and the second radiator sleeved on the feeding column is coupled and connected to the first radiator through the first via hole.

[0009] In a possible implementation manner, the second radiator is at a preset distance from the first radiator.

[0010] In a possible implementation manner, a hollow structure made of metal material is provided on the first radiator;

[0011] The hollow structure is used to ensure that the current signal connected to the feeding post is distributed as a whole on the metal edge, thereby increasing the antenna bandwidth.

[0012] In a possible implementation manner, the cross-section of the hollow structure is in one of the following shapes:

[0013] Rhombus, circle, rectangle, square, trapezoid, regular polygon.

[0014] In a possible implementation manner, the antenna element array is located at the antenna radiator layer, and the power divider circuit is located at the power divider layer; and further includes a ground layer between the antenna radiator layer and the power divider layer;

[0015] A second via hole is provided on the stratum;

[0016] The first radiator is connected to the power divider circuit through the first via hole, the feeding post, and the second via hole in sequence.

[0017] In a possible implementation, it further includes a first dielectric layer and a second dielectric layer;

[0018] The first dielectric layer is disposed between the antenna radiator layer and the ground layer, and the second dielectric layer is disposed between the ground layer and the power divider layer.

[0019] In a possible implementation manner, the antenna radiator layer, the ground layer, and the power divider layer are all copper layers.

[0020] In a possible implementation, it further includes a metal shielding layer;

[0021] The metal shielding layer is arranged on the outer side of the power divider layer, and is used to protect the power divider layer and the cable welding points involved.

[0022] In a possible implementation manner, the antenna element array consists of 4 antenna elements in 2 rows and 2 columns;

[0023] The power divider circuit is provided with four-way power dividers, and the four-way power dividers are provided corresponding to the four antenna units.

[0024] In a possible implementation manner, a feeding point is further provided on the power divider circuit, and the feeding point is electrically connected to the four-way power divider;

[0025] The feeding point is used to access the feeding system and transmit the accessed electric energy to the four-way power divider.

[0026] In a possible implementation, it further includes a transmission line with an impedance of 50 ohms;

[0027] One end of the transmission line is connected to the feeding point, and the other end is connected to the input end of the access device.

[0028] In a possible implementation manner, a first antenna grounding structure is disposed on the power divider layer, a plurality of rows of metal vias are disposed on the ground layer, and the first antenna grounding structure is disposed corresponding to the plurality of rows of metal vias;

[0029] The first antenna ground structure is connected to the ground layer through the multiple rows of metal vias.

[0030] In a possible implementation manner, a second antenna grounding structure is further provided on the power divider layer, a plurality of metal vias are provided along the periphery of the ground layer, and the second antenna grounding structure is provided corresponding to the plurality of metal vias;

[0031] The second antenna ground structure is connected to the ground layer through the plurality of metal vias.

[0032] In a possible implementation manner, the metal shielding layer disposed outside the power divider layer is welded to the power divider layer through the second antenna grounding structure.

[0033] In a possible implementation manner, the distance between the antenna units included in the antenna unit array is determined by one or more of the following data:

[0034] Radiation angle, transmission frequency, antenna size, center frequency, material length.

[0035] In a possible implementation manner, the feeding post is a hollow copper-plated feeding post adapted for a printed circuit board PCB antenna.

[0036] In a second aspect, the utility model further provides a human body monitoring system, comprising: an ultra-wideband radar antenna device as described in any one of the first aspect and various embodiments thereof.

[0037] The above-mentioned ultra-wideband radar antenna device and human body monitoring system are adopted, wherein the ultra-wideband radar antenna device mainly includes an antenna unit array and a power divider circuit, wherein the antenna unit array includes a plurality of antenna units arranged in an array; wherein the antenna unit includes a feed post, a first radiator provided with a first via hole, and a second radiator sleeved with the feed post; the second radiator and the first radiator are in the same plane; the power divider circuit is connected to the feed post, and the second radiator sleeved on the feed post is coupled and connected with the first radiator through the first via hole. It can be known that the first radiator here is not directly connected to the feed post, but forms a coupling effect with the second radiator sleeved on the feed post through a certain gap, which can increase the bandwidth of the antenna, facilitate antenna adjustment, and significantly improve the antenna performance, so as to meet the needs of various monitoring environments to a large extent.

[0038] Other advantages of the present invention will be explained in more detail with reference to the following description and accompanying drawings.

[0039] It should be understood that the above description is only an overview of the technical solution of the utility model, so that the technical means of the utility model can be generally understood and then implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described below by example. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the following is a brief introduction to the drawings required for use in the embodiment. The drawings herein are incorporated into the specification and constitute a part of this specification. These drawings illustrate embodiments that conform to the utility model and are used together with the specification to illustrate the technical solution of the utility model. It should be understood that the drawings only illustrate certain embodiments of the utility model and should not be regarded as limiting the scope of protection. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work. Moreover, the same reference numerals are used to represent the same components throughout the drawings. In the drawings:

[0041] Figure 1 A schematic structural diagram of an ultra-wideband radar antenna device provided by an embodiment of the utility model is shown;

[0042] Figure 2 A schematic diagram of the structure of an ultra-wideband radar antenna device provided by an embodiment of the utility model in a top-down view is shown;

[0043] Figure 3 A schematic diagram of the structure of an ultra-wideband radar antenna device provided by an embodiment of the utility model at a horizontal viewing angle is shown;

[0044] Figure 4 A schematic diagram showing the structure of a stratum in an ultra-wideband radar antenna device provided by an embodiment of the utility model is shown;

[0045] Figure 5 A schematic structural diagram of a power divider layer in an ultra-wideband radar antenna device provided by an embodiment of the utility model is shown;

[0046] Figure 6 An antenna return loss effect diagram of an ultra-wideband radar antenna device provided by an embodiment of the utility model is shown;

[0047] Figure 7 An antenna efficiency effect diagram of an ultra-wideband radar antenna device provided by an embodiment of the utility model is shown;

[0048] Figure 8 The 2D radiation pattern of an ultra-wideband radar antenna device provided by an embodiment of the utility model at a frequency point of 8.25 GHz is shown.

[0049] Illustration Description:

[0050] 1-antenna unit array; 2-power divider circuit; 11-antenna unit; 22-power divider; 33-second via; 111-feeding post; 112-first radiator; 113-second radiator; 1121-first via; 1122-hollow slot; A-antenna radiator layer; B-power divider layer; G-ground layer; C-metal shielding layer; K-feeding point; P1-first dielectric layer; P2-second dielectric layer; G1-first antenna grounding structure; G2-second antenna grounding structure. DETAILED DESCRIPTION

[0051] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0052] In the description of the embodiments of the present invention, it should be understood that terms such as "including" or "having" are intended to indicate the presence of disclosed features, numbers, steps, behaviors, components, parts, or a combination thereof in the specification, and do not exclude the possibility of the presence of one or more other features, numbers, steps, behaviors, components, parts, or a combination thereof.

[0053] Unless otherwise specified, “ / ” means or. For example, a / b can mean a or b. The “and / or” in this article is merely a way to describe the association relationship between associated objects, indicating that three relationships can exist. For example, a and / or b can mean: a exists alone, a and b exist at the same time, and b exists alone.

[0054] The terms "first", "second", etc. are used only to distinguish the same or similar technical features for the convenience of description, and should not be understood as indicating or implying the relative importance or quantity of these technical features. Thus, the features defined by "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present utility model, unless otherwise specified, the term "plurality" means two or more than two.

[0055] Research has found that the existing ultra-wideband radar antennas have poor antenna performance due to their own defects, and thus cannot adapt well to the needs of various monitoring environments such as drone radar inspections and vehicle-mounted living motion detection.

[0056] In order to at least partially solve one or more of the above-mentioned problems and other potential problems, the utility model provides an ultra-wideband radar antenna device and a human body monitoring system to improve antenna performance and meet the needs of various monitoring environments including human presence monitoring.

[0057] Next, the ultra-wideband radar antenna device provided by the present utility model will be introduced in detail in combination with the following multiple embodiments.

[0058] Embodiment 1

[0059] like Figure 1 As shown, an embodiment of the utility model provides an ultra-wideband radar antenna device, comprising: an antenna unit array 1 (not shown), and a power divider circuit 2, the antenna unit array 1 comprising a plurality of antenna units 11 arranged in an array;

[0060] The antenna unit 11 includes a feeding post 111, a first radiator 112 provided with a first via hole 1121, and a second radiator 113 sleeved with the feeding post 111; the second radiator 113 and the first radiator 112 are in the same plane;

[0061] The power divider circuit 2 is connected to the feeding post 111 , and the second radiator 113 sleeved on the feeding post 111 is coupled to the first radiator 112 through the first via 1121 .

[0062] In order to facilitate the understanding of the ultra-wideband radar antenna device provided by the utility model, the application scenario of the device is briefly introduced below. The above ultra-wideband radar antenna device is mainly used in ultra-wideband radar systems. Ultra-wideband (UWB) radar refers to a radar whose fractional bandwidth (FBW) of the radar transmission signal is greater than 0.25. The main feature of the ultra-wideband technology is that the occupied bandwidth is very large, and a series of processing and processing of very short single pulses are performed to achieve functions such as communication, detection and remote sensing.

[0063] However, the ultra-wideband radar antenna provided in the related art has poor antenna performance due to the defects of the components themselves, and thus cannot meet the ultra-wideband radar system's needs for ultra-large bandwidth. Based on this, the embodiment of the utility model provides an ultra-wideband radar antenna device that increases the antenna bandwidth based on the coupling effect formed by the via structure, and the antenna performance is better, sufficient to meet the needs of more actual monitoring environments.

[0064] The ultra-wideband radar antenna device provided by the embodiment of the utility model is mainly composed of an antenna unit array 1 and a power divider circuit 2. The antenna unit array 1 here realizes signal transmission or reception through a plurality of antenna units 11. With respect to the antenna unit 11, the embodiment of the utility model realizes the above-mentioned function of the antenna through a feed post 111, a first radiator 112 provided with a first via 1121, and a second radiator 113 sleeved with the feed post 111.

[0065] The two radiators here (i.e., the first radiator 112 and the second radiator 113) are mainly used to support the antenna to radiate electromagnetic waves to the surrounding space. In order to meet the ultra-bandwidth transmission requirements, the second radiator 113 sleeved on the feeding column 111 is coupled and connected to the first radiator 112 through the first via 1121 in the embodiment of the utility model. That is, the first radiator 112 and the second radiator 113 are not directly connected, and a coupling effect is formed through a certain gap, which can increase the bandwidth of the antenna, facilitate the adjustment of the antenna, and improve the radiation performance of the antenna.

[0066] In order to achieve a better coupling effect, the first radiator 112 and the second radiator 113 can be arranged in the same plane, so that after receiving the current signal transmitted by the feeding column 111, the second radiator 113 can be better coupled to the first radiator 112 around the first via 1121, thereby further increasing the bandwidth of the antenna and improving the antenna performance.

[0067] At the same time, the feeding pole 111 in the embodiment of the utility model is directly connected to the line end of the power divider, rather than being directly connected to the stratum in the traditional technology. This will enable the signal energy introduced by the power divider line 2 to be directly transmitted to the radiator through the feeding pole 111 to complete electromagnetic wave transmission under better conditions, or, it can also achieve electromagnetic wave reception under better conditions.

[0068] Embodiment 2

[0069] like Figures 1-2 As shown, there is a certain gap (corresponding to a preset distance) between the first radiator 112 and the second radiator 113. The gap distance here can be determined by the antenna performance that the user actually needs to achieve. For example, it is determined here in combination with the impedance of the antenna. For example, for an impedance of 50 ohms, the required distance is different from the distance required for an impedance of 100 ohms. The appropriate gap distance can be calculated through software simulation, which will not be elaborated here.

[0070] Embodiment 3

[0071] In order to further improve the performance of the antenna, the first radiator 112 in the ultra-wideband radar antenna device provided in the embodiment of the utility model is also provided with a hollow structure made of metal material. Through this hollow structure, the ultra-wideband current signal connected to the feeding column 111 can be distributed as a whole on the metal edge, thereby increasing the antenna bandwidth.

[0072] In a specific application, the hollow structure here can be a hollow groove 1122, such as Figures 1-2 As shown, when the second radiator 113 is coupled to the first radiator 112, a skin effect of current will be generated on the metal hollow groove 1122 set on the first radiator 112, that is, the high-frequency current forms different magnetic field strengths inside and on the surface of the conductor, and the current will be concentrated on the surface of the conductor rather than inside, and the impedance of the current flowing through the surface of the conductor is smaller. For the first radiator 112 with the hollow groove 1122 added, some signal energy will be concentrated on the periphery and some will be distributed on the edge of the hollow groove 1122, which significantly increases the bandwidth of the antenna and is beneficial to improving the antenna performance.

[0073] The hollow groove 1122 is not limited to Figure 1 The rhombus shown may also be other shapes, such as circle, rectangle, square, trapezoid, regular polygon, etc., which can be determined according to the actual needs of the user and are not specifically limited here.

[0074] Embodiment 4

[0075] The ultra-wideband radar antenna device provided by the embodiment of the utility model has a rich functional layer structure, such as an antenna radiator layer, a power divider layer, a ground layer, etc. Corresponding dielectric layers can be set between the functional layers based on actual needs, that is, the functional layers are not directly attached to each other, and the functions of different functional layers are improved by the intervening dielectric layers.

[0076] like Figure 3 As shown, the ultra-wideband radar antenna device provided by the embodiment of the utility model mainly includes an antenna radiator layer A set by the antenna unit array 1, a power divider layer B set by the power divider line 2, and a stratum G between the antenna radiator layer A and the power divider layer B.

[0077] The antenna radiator layer A, the ground layer G, and the power divider layer B are all copper layers.

[0078] Here, a second via hole 33 is provided on the ground layer G, such as Figure 4 As shown, in this way, the second radiator 113 is connected to the power divider circuit 2 through the first via hole 1121, the feeding column 111, and the second via hole 33 in sequence.

[0079] Each feeding post 111 here is connected to the corresponding second radiator 113 on the antenna radiator layer A, and is connected to the corresponding power divider arranged on the power divider layer B.

[0080] In addition to the above-mentioned functional layers, the embodiment of the utility model further includes a first dielectric layer P1 and a second dielectric layer P2. Figure 3 As shown, the first dielectric layer P1 is arranged between the antenna radiator layer A and the ground layer G to assist in realizing the radiation function of the radiator; the second dielectric layer P2 is arranged between the ground layer G and the power divider layer B to assist in realizing the diversion function of the power divider line 2.

[0081] Regardless of the first dielectric layer P1 or the second dielectric layer P2, the electrical performance parameters of the dielectric layer can be selected according to the actual application of the antenna. For example, a dielectric layer with a dielectric constant of 6.15 and a dielectric loss of 0.003 can be selected.

[0082] Depend on Figure 3 From the antenna layer diagram shown, the top copper layer is the antenna radiator layer A (on which four antenna units 11 are arranged as shown in the figure). Next is the first dielectric layer P1, and the second copper layer is the ground layer G. Next is the second dielectric layer P2, and the third copper layer is the power divider layer B. The bottom layer is the metal shielding layer C, which can be used to protect the power divider layer B and the cable welding point on the one hand, and can also facilitate the assembly of the antenna device provided by the embodiment of the utility model on the motherboard of the user end on the other hand.

[0083] Embodiment 5

[0084] The power divider circuit 2 of the ultra-wideband radar antenna device provided by the embodiment of the utility model is provided with a power divider, and the number of the power dividers provided is related to the number of antenna units 11 included in the antenna unit array 1. For example, four antenna units 11 will be provided with four power dividers 22 (such as Figure 1 As shown), similarly, six antenna units 11 will be provided with six-way power dividers 22 accordingly.

[0085] The antenna unit array 1 here can adopt various array composition modes, such as 2 rows and 2 columns, 3 rows and 3 columns, 4 rows and 4 columns, etc.; for example, 2 rows and 3 columns, 4 rows and 3 columns, etc., can be determined in combination with actual application requirements, and no specific limitation is made here.

[0086] Take the antenna element array 1 composed of 4 antenna elements 11 in 2 rows and 2 columns as an example. Figure 2 As shown, the four antenna units 11 are spaced apart by a certain distance d to form an array antenna (corresponding to the antenna unit array 1).

[0087] The spacing d between the antenna units 11 can be calculated to a more appropriate value based on software simulation, and in the embodiment of the utility model, it can be determined based on one or more of the data such as radiation angle, transmission frequency, antenna size, center frequency, material length, etc. When actually determining the spacing, it can be determined based on the overall gain of the antenna, and antenna performance parameters such as 3dB lobe width, which will not be described in detail here.

[0088] Embodiment 6

[0089] like Figure 5 FIG. 1 is a schematic diagram of the structure of the power divider layer B according to an example of an embodiment of the present utility model, which includes four power dividers 22 in total, and the four power dividers 22 correspond to the following respectively: Figures 1-2 Four antenna units 11 are shown as being arranged.

[0090] A feeding point K is also provided on the power divider circuit 2 here, and the feeding point K is electrically connected to the four-way power divider 22 for accessing the feeding system and transmitting the accessed electric energy to the four-way power divider 22, so as to facilitate the use of the four-way power divider 22 for diversion, and then the diverted signal energy is transmitted to each antenna unit 11. Equal diversion or unequal diversion can be used here, and no specific limitation is made here.

[0091] like Figure 5 As shown, K is the feeding point of the four-in-one antenna, and lines L1, L2, L3, and L4 are the routing of each power divider 22. In the embodiment of the utility model, a reasonable routing width and length can be designed according to the impedance required by the antenna and the lobe width of the gain diagram. In practical applications, the numerical values ​​based on simulation design are generally used first, and no detailed limitation is made here.

[0092] In the ultra-wideband radar antenna device provided in the embodiment of the utility model, a transmission line with a specific impedance (such as 50 ohm impedance) can also be provided, one end of the transmission line is connected to the above-mentioned feeding point K, and the other end can be connected to the input end of the access device for accessing the current signal.

[0093] The length of the transmission line and the connector model can be selected according to the actual equipment and no specific restrictions are made here.

[0094] Embodiment 7

[0095] In order to better achieve stratum fusion, such as Figure 5 A first antenna grounding structure G1 is provided on the power divider layer B as shown. Figure 4 As shown, multiple rows of metal vias are arranged on the ground layer G, and the first antenna ground structure G1 is arranged corresponding to the multiple rows of metal vias, so that the first antenna ground structure G1 is connected to the ground layer G through the multiple rows of metal vias. That is, the first antenna ground structure G1 is connected to the ground layer G through several rows of metal vias, realizing the overall ground layer concept.

[0096] At the same time, Figure 5 A second antenna grounding structure G2 is also provided on the power divider layer B as shown. Figure 4 As shown, multiple metal vias are arranged around the upper edge of the formation G, and the second antenna grounding structure G2 is arranged corresponding to the multiple metal vias, so that the second antenna grounding structure G2 is connected to the formation G through multiple metal vias. That is, the second antenna grounding structure G2 is connected to the formation G through a circle of metal vias, realizing the overall formation concept. In addition, the copper leakage of the second antenna grounding structure G2 can also be used for welding the metal shielding layer, which provides a simpler installation and splicing method while protecting the power divider layer B, and is more practical.

[0097] It should be emphasized that no matter which of the above embodiments provides the ultra-wideband radar antenna device, in practical applications, it can be a printed circuit board (PCB) antenna, and the feed post 111 can be a hollow copper-plated feed post adapted to the PCB antenna. For other types of antennas, the feed post 111 here can also be a solid feed post, which will not be described in detail here.

[0098] By using the ultra-wideband radar antenna device provided in Embodiments 1 to 7 of the present invention, antenna performance with a wider bandwidth can be achieved, and antenna adjustment is facilitated, thereby being able to meet the needs of various monitoring environments to a large extent.

[0099] like Figure 6 As shown, the antenna return loss effect diagram provided by the embodiment of the utility model, the values ​​within the working frequency range are all less than -10db. For a physical structure with a very low height and small size, achieving a return loss within the frequency band of less than -10db is sufficient to indicate that this is an antenna device with good performance.

[0100] Figure 7 As shown, it is an antenna efficiency effect diagram provided by an embodiment of the utility model. The efficiency values ​​within the working frequency band are all greater than -1db, which is enough to show that this is an antenna device with good performance.

[0101] like Figure 8 As shown, it is the 2D radiation pattern of the antenna provided by the embodiment of the utility model at the frequency point of 8.25GHz. It can be seen from the data in the figure that the 2D maximum gains are all greater than 7dBi, and the lobe width is about 60 degrees, which is in line with the radiation range of the antenna device and is more applicable.

[0102] Based on the ultra-wideband radar antenna device provided in embodiments 1 to 7 of the present invention, the embodiment of the present invention also provides a human body monitoring system. The antenna device here serves as a component in the human body monitoring system. It can identify signals through the radiation gain intensity of the antenna and within a specific gain radiation angle, that is, a special lobe width, thereby facilitating more accurate human body monitoring.

[0103] The embodiments of the utility model can work well even under monitoring conditions with low visibility and high flexibility. This is mainly because the ultra-wideband electromagnetic wave scattering of human body movement forms a complex return signal structure, which can be approximated as a mirror multipath scattering model. Therefore, living body movement, life characteristics, etc. can be detected in the vehicle. It is more practical for escorting more and more passengers in vehicles and serving vehicle users well.

[0104] In the description of this specification, the description with reference to the terms "some possible embodiments", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the utility model, and the above terms do not necessarily represent the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0105] Although the spirit and principle of the present invention have been described above with reference to several specific embodiments, it should be understood that the present invention is not limited to the disclosed specific embodiments, and the division of various aspects does not mean that the features in these aspects cannot be combined. The present invention is intended to cover various modifications and equivalent arrangements included in the spirit and scope of the attached claims.

Claims

1. An ultra-wideband radar antenna device, characterized in that: include: An antenna unit array and a power divider circuit, wherein the antenna unit array includes a plurality of antenna units arranged in an array; The antenna unit comprises a feeding post, a first radiator provided with a first via hole, and a second radiator sleeved with the feeding post; the second radiator and the first radiator are in the same plane; The power divider circuit is connected to the feeding column, and the second radiator sleeved on the feeding column is coupled and connected to the first radiator through the first via hole.

2. The ultra-wideband radar antenna device according to claim 1, characterized in that: The first radiator is provided with a hollow structure made of metal material; The hollow structure is used to ensure that the current signal connected to the feeding post is distributed as a whole on the metal edge, thereby increasing the antenna bandwidth.

3. The ultra-wideband radar antenna device according to claim 2, characterized in that: The cross-section of the hollow structure is one of the following shapes: Rhombus, circle, rectangle, square, trapezoid, regular polygon.

4. The ultra-wideband radar antenna device according to any one of claims 1 to 3, characterized in that: The antenna unit array is located at the antenna radiator layer, and the power divider circuit is located at the power divider layer; and also includes a stratum between the antenna radiator layer and the power divider layer; A second via hole is provided on the stratum; The second radiator is connected to the power divider circuit through the first via hole, the feeding post, and the second via hole in sequence.

5. The ultra-wideband radar antenna device according to claim 4, characterized in that: Also includes a first dielectric layer and a second dielectric layer; The first dielectric layer is disposed between the antenna radiator layer and the ground layer, and the second dielectric layer is disposed between the ground layer and the power divider layer.

6. The ultra-wideband radar antenna device according to claim 4, characterized in that: Also includes a metal shielding layer; The metal shielding layer is arranged on the outer side of the power divider layer, and is used to protect the power divider layer and the cable welding points involved.

7. The ultra-wideband radar antenna device according to claim 4, characterized in that: The antenna element array consists of 4 antenna elements in 2 rows and 2 columns; The power divider circuit is provided with four-way power dividers, and the four-way power dividers are provided corresponding to the four antenna units.

8. The ultra-wideband radar antenna device according to claim 4, characterized in that: A first antenna grounding structure is disposed on the power divider layer, a plurality of rows of metal vias are disposed on the ground layer, and the first antenna grounding structure is disposed corresponding to the plurality of rows of metal vias; The first antenna ground structure is connected to the ground layer through the multiple rows of metal vias.

9. The ultra-wideband radar antenna device according to claim 4, characterized in that: A second antenna grounding structure is also provided on the power divider layer, a plurality of metal vias are provided along the periphery of the ground layer, and the second antenna grounding structure is provided corresponding to the plurality of metal vias; The second antenna ground structure is connected to the ground layer through the plurality of metal vias.

10. A human body monitoring system, characterized in that: include: The ultra-wideband radar antenna device according to any one of claims 1 to 9.

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