A medical carrier device integrated with wireless data communication function

Abstract

The application discloses a medical carrying device integrated with a wireless data communication function, and the medical carrying device comprises a bed body, a bed plate, a signal processing module and an antenna, the signal processing module is arranged on the bed plate or the bed body and is provided with a radio frequency signal port, the antenna is arranged on the bed plate or the bed body and is provided with a radio frequency feeding port, and the radio frequency feeding port is connected with the radio frequency signal port through a radio frequency connecting line. In the above manner, the medical carrying device has the wireless communication function, so that the information level of the medical carrying device is improved.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a medical transport device integrating wireless data communication functionality. Background Technology

[0002] Medical transport devices are specialized equipment used for the safe and rapid transfer of patients or injured persons within medical institutions or between different medical facilities. They mainly include medical beds and transport beds. Medical beds and transport beds are important components of modern medical equipment, serving as basic devices to support patient examinations and treatments.

[0003] Currently, medical transport devices (such as medical beds and transfer beds) mainly provide a stable and comfortable surface to facilitate physical examinations and diagnoses of patients, such as endoscopy, ultrasound, and CT scans. They primarily rely on their mechanical structures to physically support the patient's body and have relatively limited functions. For example, medical beds need to be equipped with bedside call devices to help patients contact medical staff in a timely manner. Summary of the Invention

[0004] The main technical problem addressed by this application is to provide a medical transport device and antenna that integrates wireless data communication functions, enabling the medical transport device to have wireless communication capabilities, thereby improving the information level of the medical transport device.

[0005] In a first aspect, embodiments of this application provide a medical transport device integrating wireless data communication functionality, comprising:

[0006] Bed frame;

[0007] A bed board is installed on the bed frame;

[0008] A signal processing module is disposed on the bed board or the bed body, and the signal processing module has a radio frequency signal port; and,

[0009] An antenna is mounted on the bed board or the bed body. The antenna has an RF feed port, which is connected to the RF signal port via an RF connection line.

[0010] Secondly, embodiments of this application provide an antenna, the antenna comprising:

[0011] Dielectric substrate;

[0012] Two metal patches are respectively disposed on the first surface and the second surface of the dielectric substrate, with the second surface opposite to the first surface;

[0013] A microstrip feed line is disposed on the first surface, and its two ends are respectively connected to a metal patch and an RF feed port on the first surface; wherein...

[0014] The two metal patches are arranged symmetrically about the center of the dielectric substrate at 180°. The projections of the two metal patches on the dielectric substrate in a first direction are spaced apart, and their projections on the dielectric substrate in a second direction overlap. The first direction and the second direction are perpendicular.

[0015] Unlike existing technologies, the advantages of this application are: by installing an antenna on the bed frame or bed board, communication with the patient's wearable wireless monitoring device and signal processing module is possible, enabling the medical transport device to have wireless communication capabilities and transmit data in real time. This improves the informatization level of the medical transport device, thus providing a hardware foundation for improving medical efficiency, enhancing nursing quality, and supporting telemedicine. Furthermore, the antenna can be mounted on the bed board and can be a planar antenna structure to conform to the bed board, reducing the space requirements on the bed board.

[0016] Furthermore, the antenna of this application can be configured by setting two metal patches on two opposing surfaces of a dielectric substrate, and setting a microstrip feed line on one of the surfaces. The two ends of the microstrip feed line are respectively connected to the metal patch and the RF feed port on the surface. The two metal patches are arranged 180° rotationally symmetrically about the center of the dielectric substrate, and their projections in the first direction of the dielectric substrate are spaced apart, while their projections in the second direction of the dielectric substrate overlap. The first direction and the second direction are perpendicular, thereby achieving circularly polarized ultra-wideband performance, strong anti-interference capability, efficient broadband coverage, and good directional adaptability. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0018] Figure 1 This is a schematic diagram of the structure of a medical transport device provided in one embodiment of this application;

[0019] Figure 2 This is a schematic diagram of the connection between the antenna and the signal processing module in a medical transport device provided in one embodiment of this application;

[0020] Figure 3 This is a side view of a medical transport device provided in one embodiment of this application;

[0021] Figure 4 This is a schematic diagram of the planar antenna structure in a medical transport device provided in one embodiment of this application;

[0022] Figure 5 yes Figure 4 A side view of the planar antenna shown;

[0023] Figure 6 yes Figure 4 A schematic diagram showing the simulation results of the reflection coefficient of the planar antenna structure shown;

[0024] Figure 7 yes Figure 4 A schematic diagram of the simulation results for the axial ratio of the planar antenna structure shown;

[0025] Figure 8 yes Figure 4 The diagram shows the simulation results of the yoz plane of the planar antenna structure. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0027] Communication technology plays an indispensable role in the current development of informatization and intelligentization. Wireless communication, with its wireless characteristics, offers greater convenience and flexibility, making it a widely used technology in the field. The technological foundation of wireless communication primarily lies in the transmission and reception of radio waves via antennas.

[0028] The embodiments of this application provide a medical transport device with integrated wireless data communication function, including a medical bed and / or a transport bed.

[0029] like Figure 1 and Figure 2 As shown, this application provides a medical transport device integrating wireless data communication functionality, comprising:

[0030] Bed 1;

[0031] Bed board 2 is installed on bed frame 1;

[0032] Signal processing module 3, mounted on bed board 2 or bed body 1, has a radio frequency signal port 31; and,

[0033] Antenna 4 is mounted on bed board 2 or bed body 1. Antenna 4 has an RF feed port 41, which is connected to RF signal port 31 via RF connection line 5.

[0034] The medical transport device provided in this embodiment can achieve wireless communication functionality by installing antenna 4, thereby enabling communication with medical-related equipment. For example, signal processing module 3 can communicate with a patient-wearable wireless monitoring device through antenna 4, receiving monitoring signals generated by the wireless monitoring device from physiological parameters (such as heart rate, blood pressure, body temperature, blood oxygen, etc.), and sending the monitoring signals to signal processing module 3. After processing by signal processing module 3, the signals are sent to external devices such as an external data center, facilitating timely acquisition of patient physiological parameters and other information by external devices. In this way, the medical transport device has wireless communication capabilities, enabling real-time transmission of patient physiological parameters and other information to external devices, improving data timeliness. Of course, in some embodiments, signal processing module 3 may not be connected to external devices, and after acquiring the data received by antenna 4, it may perform relevant processing and storage itself.

[0035] The antenna 4 and the signal processing module 3 can both be mounted on the bed board 2, or both on the bed body 1; alternatively, one can be mounted on the bed board 2 and the other on the bed body 1. Since the patient is located on the bed board 2, in order for the antenna 4 to receive the monitoring signals from the wireless monitoring device worn by the patient more efficiently, the distance between the antenna 4 and the wireless monitoring device worn by the patient should be as close as possible, so the antenna 4 can be mounted on the bed board 2.

[0036] In some embodiments, the signal processing module 3 is further provided with a data transmission port 32, through which the signal processing module 3 can communicate wirelessly or wiredly with external devices. In this embodiment, the external device is an external data center, which is wirelessly connected to the patient's wearable wireless monitoring device and medical terminal device.

[0037] In some embodiments, combined with Figure 1 and Figure 3 The medical transport device also includes a guide rail 11 fixedly connected to the bed 1, and a bed board 2 slidably connected to the guide rail 11, which facilitates examination or care for the patient. Figure 3 The diagram shows the bed board 2 and bed frame 1 separately, clearly illustrating the sliding connection between them. For example, the top of bed frame 1 has a support plate 12 for supporting the bed board 2. The support plate 12 has a recessed accommodating space, and a pair of guide rails 11 with dovetail grooves are fixedly connected to its two long sides. The back of bed board 2 has a dovetail-shaped sliding strip structure 21 that matches the dovetail grooves, enabling the sliding connection between bed board 2 and bed frame 1. It should be noted that... Figure 1 , Figure 3 The structure of the medical transport device shown is for illustrative purposes only and should not be construed as limiting the scope of this application.

[0038] When the bed board 2 is slidably connected to the bed body 1, the patient moves with the bed board 2. In order to ensure good communication between the antenna 4 and the wireless monitoring device worn by the patient, the antenna 4 is preferably set on the bed board 2. When the antenna 4 is set on the bed board 2 and the bed board 2 is slidably connected to the bed body 1, considering that the antenna 4 is wired to the signal processing module 3, the signal processing module 3 is preferably also set on the bed board 2.

[0039] In some embodiments, since the front of the bed board is mainly used to support the patient and the space on the front of the bed board for placing other components is limited, at least one of the antenna 4 and the signal processing module 3 is located on the back of the bed board 2.

[0040] The bed board 2 is located on the upper end face of the bed body 1, and the upper end face has a recess 13. The recess 13 on the upper end face and the back of the bed board 2 form an accommodating space to accommodate at least one of the antenna 4 and the signal processing module 3.

[0041] Reference Figure 1 and Figure 3 The top of the bed 1 has a support plate 12, and the upper surface of the support plate 12 is the upper surface of the bed 1. The recess 13 of the upper surface forms an accommodating space with the bed board 2. When both the antenna 4 and the signal processing module 3 are mounted on the bed board 2, it is preferable that both the antenna 4 and the signal processing module 3 are mounted on the back of the bed board 2.

[0042] In some embodiments, antenna 4 is a planar antenna. The space behind the bed board 2 of the medical transport device is limited. To maintain the existing frame structure of the medical transport device as much as possible, antenna 4 is designed as a planar antenna. This allows antenna 4 to easily conform to the bed board 2 and be easily installed and connected to it, effectively reducing the space requirements on the back of the bed board and improving the space utilization efficiency of the back of the bed board.

[0043] In some implementations, such as Figure 4 and Figure 5 As shown, the planar antenna structure includes:

[0044] Dielectric substrate 401;

[0045] Two metal patches 402 are respectively disposed on the first surface and the second surface of the dielectric substrate 401, with the second surface facing away from the first surface;

[0046] A microstrip feed line 403 is disposed on the first surface, and the two ends of the microstrip feed line 403 are respectively connected to a metal patch 402 and an RF feed port 41 on the first surface.

[0047] The two metal patches 402 are arranged symmetrically about the center of the dielectric substrate 401 at 180°. The projections of the two metal patches 402 in the first direction of the dielectric substrate 401 are spaced apart, and the projections in the second direction of the dielectric substrate 401 overlap. The first direction and the second direction are perpendicular.

[0048] The planar antenna installed in the medical transport device provided in this embodiment comprises a three-layer structure (top, middle, and bottom). It is a low-profile planar structure, easily conforming to the bed board of the medical transport device, reducing space requirements on the back of the bed board and improving space utilization efficiency. Based on the relative positional relationship of the two metal patches 402 and the design of the single-feed microstrip feed line 403, the microstrip feed line 403 excites horizontal and vertical orthogonal currents on the two metal patches 402. This gives the planar antenna excellent circular polarization and ultra-wideband performance. Good circular polarization significantly reduces polarization mismatch problems that may occur during antenna transmission and reception, resulting in strong anti-interference capabilities. Ultra-wideband performance greatly improves data transmission efficiency, enabling multiple frequency bands to be reused and achieving efficient bandwidth coverage. Thus, the medical transport device equipped with this planar antenna has excellent wireless communication capabilities.

[0049] For ease of description, the dielectric substrate 401 has a first direction (illustrated in conjunction with the y-direction in the figure) and a second direction (illustrated in conjunction with the x-direction in the figure) that are perpendicular to each other, as well as a third direction (perpendicular to both the first and second directions, illustrated as the z-direction); the two metal patches 402 are distinguished as a first metal patch 4021 located on the first surface and a second metal patch 4022 located on the second surface, the projections of the first metal patch 4021 and the second metal patch 4022 in the y-direction are spaced apart, and the projections in the x-direction overlap.

[0050] It should be noted that in the embodiments of this application, the projections of the two metal patches 402 on the dielectric substrate 401 in the second direction overlap. This can be understood as: when viewed from a third party upwards, the orthographic projection of the first metal patch 4021 in the x direction and the orthographic projection of the second metal patch 4022 in the x direction overlap.

[0051] In some implementations, the two metal patches 402 have the same geometry, which can form double-sided radiation. Through the electromagnetic coupling effect of the dielectric substrate, the overall radiation efficiency of the antenna can be effectively improved.

[0052] In some embodiments, the microstrip feed line 403 extends along a second direction, and the centerline of the microstrip feed line 403 in the second direction is located at the center of the overlapping region in the first direction. This single-feeder, center-fed design avoids complex feed networks and enables a low-profile design.

[0053] In some embodiments, at least one metal patch 402 is a rectangular patch, wherein the patch length in a first direction is the product of the initial patch length of the metal patch 402 and a first adjustment ratio, and the patch width in a second direction is the product of the initial patch width and a second adjustment ratio, wherein the initial patch width is a first ratio of the initial patch length. Two metal patches 402 are arranged symmetrically about the center of the dielectric substrate at 180° rotation. Preferably, both metal patches 402 are rectangular patches. (Refer to...) Figure 4 .

[0054] For ease of description, the initial patch length is L2(0), the initial patch width is W2(0), the first adjustment ratio is λ1, the second adjustment ratio is λ2, the first ratio is α1, the patch length of the metal patch 402 in the first direction is L2, and the patch width of the metal patch 402 in the second direction is W2. Then, the following relationship exists:

[0055] L2=λ1 L2(0), W2=λ2 W2(0)=λ2 α1 L2(0).

[0056] The first ratio α1 can be, but is not limited to, 1 / 2.

[0057] Based on the initial patch length and initial patch width, the size of the rectangular patch can be initially determined. Combined with the first adjustment ratio and the second adjustment ratio, the patch length and patch width of the metal patch are determined to balance impedance matching and radiation efficiency, thereby achieving a wide bandwidth.

[0058] In the embodiments of this application, the initial patch length is the ratio of the product of the speed of light in vacuum and a constant, where the constant is the product of the center frequency of the planar antenna and the square root of the relative permittivity of the dielectric substrate 401. The formula for calculating the initial patch length L2(0) is: Where C0 is the speed of light in vacuum, f0 is the center frequency of the planar antenna, and ε r is the relative permittivity of the dielectric substrate.

[0059] In this embodiment, the patch size of the metal patch is determined by the center frequency of the planar antenna and the relative permittivity of the dielectric substrate. Both the center frequency of the planar antenna and the relative permittivity of the dielectric substrate affect the radiation efficiency and bandwidth.

[0060] Furthermore, at least one of the first adjustment ratio λ1 and the second adjustment ratio λ2 can be determined based on the antenna's bandwidth and efficiency. For example, the first adjustment ratio λ1 is 0.8-1.2, and the second adjustment ratio λ2 is 0.5-1.5. That is, the first adjustment ratio λ1 can be selected from the range of 0.8-1.2, and the second adjustment ratio λ2 can be selected from the range of 0.5-1.5, based on the required antenna bandwidth and efficiency.

[0061] In some embodiments, at least one metal patch 402 is provided with a loading branch 404 extending along a first direction. The branch width of the loading branch 404 in a second direction is smaller than the patch width of the metal patch 402 in the second direction. The loading branch 404 can perform impedance matching and work in conjunction with the metal patch 402 to achieve bandwidth extension. Figure 4 As shown, both metal patches 402 are provided with loading stubs 404. The dual stubs can balance bandwidth and directivity, effectively improve the bandwidth of the antenna, and make the antenna have good directivity.

[0062] In some embodiments, at least one metal patch 402 is a rectangular patch with a chamfered corner, the chamfer being located between a first side 4023 and a second side 4024 of the rectangular patch. The first side 4023 is the side of the rectangular patch closer to the edge of the dielectric substrate 401 among the two sides in the second direction, and the second side 4024 is the side of the rectangular patch closer to the middle of the dielectric substrate 401 among the two sides in the first direction. The metal patch being a rectangular patch with a chamfered corner can improve impedance matching, extend the operating bandwidth, and enhance radiation directivity, thus enabling the antenna to have good wireless communication capabilities, thereby enabling the medical vehicle device to have good wireless communication capabilities. Figure 4 As shown, both metal patches 402 are rectangular patches with chamfered corners.

[0063] In the embodiments of this application, by reasonably setting the size of the loaded stub and the size of the chamfer, the circular polarization radiation purity within the antenna's operating frequency band can be further improved.

[0064] Optionally, the width of the loaded stub 404 in the second direction is the same as the width of the microstrip feed line 403 in the first direction, which can reduce impedance abrupt changes, improve the impedance continuity between the microstrip feed line and the metal patch, and the stub with matching width can effectively couple the feed line energy, broaden the operating frequency band of the antenna, and also simplify the manufacturing process.

[0065] The length of the stub 404 in the first direction is less than the overlap length of the two metal patches 402 in the first direction, which can effectively suppress in-band interference frequency bands.

[0066] Optionally, the stub length of the loaded stub 404 in the first direction is the product of the initial stub length and the third adjustment ratio. The initial stub length is a second ratio of the initial patch length of the metal patch 402. The initial patch length of the metal patch 402 is determined by the center frequency of the planar antenna structure and the relative permittivity of the dielectric substrate. By combining the second ratio and the third adjustment ratio, the stub length of the loaded stub 404 in the first direction can be determined.

[0067] Optionally, the angle formed by the chamfer with the first side 4023 and the second side 4024 is 45 degrees. The chamfer length in the first direction and the chamfer width in the second direction are both the product of the initial chamfer side length and the third adjustment ratio. The initial chamfer side length is the second ratio of the initial patch length of the metal patch 402.

[0068] Optionally, the linewidth of the microstrip feed 403 in the first direction is determined using the calculation principle of the characteristic impedance of the microstrip feed. The linewidth of the microstrip feed affects the characteristic impedance Z0 and bandwidth of the antenna; both excessively narrow and excessively wide linewidths will lead to impedance mismatch.

[0069] Optionally, the overlap length of the two metal patches 402 in the first direction is the product of the initial overlap length and the fourth adjustment ratio, where the initial overlap length is the third ratio of the initial patch lengths of the metal patches 402. The gap width between the two metal patches 402 in the second direction is the same as the feed width of the microstrip feed line 403 in the first direction. The overlap of the two metal patches 402 in the first direction can increase the impedance bandwidth, but excessive overlap will cause the impedance bandwidth to narrow. An excessively large gap between the two metal patches 402 in the second direction will cause the bandwidth to narrow, while an excessively small gap will affect impedance matching. Furthermore, both the overlap length and the gap width affect the axial ratio bandwidth. By rationally designing the overlap length of the two metal patches 402 in the first direction and the gap width of the two metal patches 402 in the second direction, the antenna can achieve good impedance bandwidth and axial ratio bandwidth.

[0070] For ease of description, the width of the loaded branch 404 in the second direction is W3, the length of the loaded branch in the first direction is L3, and the initial branch length is L3(0).

[0071] The overlap length of the two metal patches 402 in the first direction is L5, the gap width of the two metal patches 402 in the second direction is W5, and the initial overlap length is L5(0).

[0072] The microstrip feed line 403 has a feed line width of W6 in the first direction and an initial feed line width of W6(0). The microstrip feed line 403 has a length of L6 in the second direction.

[0073] The chamfer length is L4, the chamfer width is W4, and the initial chamfer side length is L4(0) or W4(0);

[0074] The third adjustment ratio is λ3, and the second ratio is α2; the fourth adjustment ratio is λ4, and the third ratio is α3; the fifth adjustment ratio is λ5.

[0075] Then the following relationship exists:

[0076] L3=λ3 L3(0) = λ3 α2 L2(0); W3=W6;

[0077] L4=W4=λ3 L4(0) = λ3 W4(0)=λ3 α2 L2(0);

[0078] L5=λ4 L5(0)=λ4 α3 L2(0); W5=W6;

[0079] W6=λ5 W6(0), L6=W2+W5;

[0080] Where L2(0) is the initial patch length of the metal patch 402, ;

[0081] W6(0) ,

[0082] Coefficient B is ;

[0083] C0 is the speed of light in vacuum, f0 is the center frequency of the planar antenna, and ε r Z0 is the relative permittivity of the dielectric substrate, h is the thickness of the dielectric substrate, Z0 is the characteristic impedance of the microstrip feed line (50Ω), and Z0 is the relative permittivity of the dielectric substrate. f The vacuum wave impedance is 376.8Ω.

[0084] In some embodiments, the second ratio α2 may be, but is not limited to, 1 / 6, and the third ratio α3 may be, but is not limited to, 1 / 2.

[0085] To improve the circular polarization radiation purity within the antenna's operating frequency band, the third adjustment ratio λ3 can be between 0.5 and 1.5, and the fourth adjustment ratio λ4 can also be between 0.5 and 1.5. That is, at least one of the third adjustment ratio λ3 and the fourth adjustment ratio λ4 can be selected from the range of 0.5 to 1.5 to improve the circular polarization radiation purity within the antenna's operating frequency band. Furthermore, to ensure the antenna has good impedance bandwidth and axial ratio bandwidth, the fifth adjustment ratio λ5 can be between 0.5 and 1.5. That is, the fifth adjustment ratio λ5 can be selected from the range of 0.5 to 1.5 to improve impedance bandwidth and axial ratio bandwidth.

[0086] The shape of the dielectric substrate is not particularly limited in this application. It can be rectangular, circular, regular hexagonal or other shapes. It is preferred that the dielectric substrate is rectangular. Rectangular dielectric substrates are usually used in conjunction with rectangular metal patches, which have a simple structure and are easy to manufacture. In order to save costs, the metal patches are distributed on the dielectric substrate. Preferably, the outer edges of the metal patches are distributed on the edge of the rectangular dielectric substrate. The length of the dielectric substrate in the first direction is L1 and the width in the second direction is W1, where L1 = 2L2 - L5 and W1 = 2W2 + W5.

[0087] This application does not impose any particular limitation on the material of the dielectric substrate. The preferred dielectric substrate material is Rogers 5880, with a relative permittivity of 2.2, a loss tangent of 0.0009, and a thickness of 0.762 mm.

[0088] Combination Figure 4 and Figure 5 The antenna parameters in a medical transport device provided in one embodiment of the present invention are as follows:

[0089] ;

[0090] ;

[0091] ;

[0092] ;

[0093] ;

[0094] =

[0095] ,

[0096] ;

[0097] L6 = W2 + W5;

[0098] L1 = 2L2 - L5, W1 = 2W2 + W5;

[0099] C0 is the speed of light in vacuum, f0 is the center frequency of the planar antenna, and ε r Z is the relative permittivity of the dielectric substrate. f Z0 is the vacuum wave impedance of 376.8Ω and Z0 is the characteristic impedance of the microstrip feed line of 50Ω.

[0100] It is important to note that although the calculation formulas for L3 and L4 (or W4) are the same, the dimensions of L3 and L4 will be different if the selected λ3 values ​​in the two formulas are different; similarly, although the calculation formulas for W2 and L5 are essentially the same, the dimensions of W2 and L5 will also be different if the selected λ2 and λ4 values ​​are different.

[0101] In this design, the planar antenna is an ultra-wideband circularly polarized antenna. The simulation results of the reflection coefficient of the planar antenna are as follows: Figure 6 As shown, the simulation results of its shaft ratio are as follows: Figure 7 As shown in the simulation results, the planar antenna achieves an impedance bandwidth of 125.4% (0.39GHz-1.7GHz) and an axial ratio bandwidth of 70.5% (0.68GHz-1.42GHz), while the impedance bandwidth of antennas in the prior art is generally less than 70%, and the axial ratio bandwidth is generally less than 20%. Clearly, the planar antenna in the medical vehicle provided in this application embodiment has excellent ultra-wideband circular polarization performance.

[0102] Simulation results of the yoz plane of the planar antenna structure are as follows: Figure 8 As shown in the simulation results, the main lobe of the yoz plane radiation pattern of the planar antenna points to the upper and lower sides of the planar antenna. This can effectively cover the patient area on the medical transport device and is beneficial for receiving wireless signals containing patient monitoring data emitted by the wireless monitoring device worn on the patient's body.

[0103] The medical transport device provided in the above embodiments of this application is equipped with an antenna, enabling the medical transport device to have wireless communication capabilities. This wireless communication capability can transmit physiological parameters collected by the patient's wearable wireless monitoring device to external devices in real time, reducing errors from manual recording and improving the timeliness and accuracy of data. It also facilitates medical terminal devices to obtain the patient's physiological parameters in a timely manner, improving medical efficiency, enhancing the quality of care, and optimizing the patient experience. Wireless communication technologies between external devices (external data centers) and medical terminal devices are already in use, and will not be elaborated upon in this application.

[0104] Another embodiment of this application provides an antenna, referring to... Figure 4 The antenna includes:

[0105] Dielectric substrate 401;

[0106] Two metal patches 402 are respectively disposed on the first surface and the second surface of the dielectric substrate 401, with the second surface facing away from the first surface;

[0107] A microstrip feed line 403 is disposed on the first surface, and its two ends are connected to a metal patch 402 and an RF feed port 41 on the first surface, respectively; wherein,

[0108] Two metal patches 402 are arranged symmetrically about the center of the dielectric substrate 401 at 180°. The projections of the two metal patches 402 on the dielectric substrate 401 in the first direction (in conjunction with the y-direction in the figure) are spaced apart, and the projections on the dielectric substrate 401 in the second direction (in conjunction with the x-direction in the figure) overlap. The first direction and the second direction are perpendicular.

[0109] The antenna structure provided in this embodiment is the same as that in the aforementioned embodiment of the medical transport device. Please refer to the description of the antenna structure in the embodiment of the medical transport device, which will not be repeated here.

[0110] This antenna is a low-profile planar structure antenna with excellent circular polarization performance, ultra-wideband performance, good anti-interference capability, and efficient broadband coverage. Its radiation pattern has a main beam perpendicular to the plane in which the antenna is located, resulting in good directional adaptability. This antenna can be used not only in medical vehicles but also in other equipment (such as seats), requiring little installation space and maximizing space utilization.

[0111] It should be noted that the terms "first" and "second" in this application are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0112] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A medical transport device integrating wireless data communication function, characterized in that, include: Bed frame; A bed board is installed on the bed frame; A signal processing module is disposed on the bed board or the bed body, and the signal processing module has a radio frequency signal port; as well as, An antenna is mounted on the bed board or the bed body. The antenna has an RF feed port, which is connected to the RF signal port via an RF connection line. The antenna is a planar antenna, comprising a dielectric substrate, two metal patches, and a microstrip feed line. The two metal patches are respectively disposed on a first surface and a second surface of the dielectric substrate, with the second surface opposite to the first surface. The microstrip feed line is disposed on the first surface, with its two ends connected to a metal patch on the first surface and an RF feed port, respectively. The two metal patches are arranged symmetrically about the center of the dielectric substrate at a 180° rotational angle. The projections of the two metal patches onto the first direction of the dielectric substrate are spaced apart, and on the second surface of the dielectric substrate… The projections in the two directions overlap, the first direction and the second direction are perpendicular, the metal patch has a loading branch, the loading branch extends along the first direction, the branch width of the loading branch in the second direction is smaller than the patch width of the metal patch in the second direction, the metal patch is a rectangular patch with a chamfer, the chamfer is located between the first side and the second side of the rectangular patch, the first side is the side of the rectangular patch closer to the edge of the dielectric substrate in the second direction, and the second side is the side of the rectangular patch closer to the middle of the dielectric substrate in the first direction.

2. The medical transport device according to claim 1, characterized in that, The rectangular patch has a patch length in the first direction that is the product of the initial patch length of the metal patch and a first adjustment ratio. The rectangular patch has a patch width in the second direction that is the product of the initial patch width and a second adjustment ratio. The initial patch width is a first ratio of the initial patch length.

3. The medical transport device according to claim 1, characterized in that, The width of the loaded stub in the second direction is the same as the width of the microstrip feed line in the first direction; The length of the loaded branch in the first direction is less than the overlap length of the two metal patches in the first direction, and / or the length of the loaded branch in the first direction is the product of the initial branch length and the third adjustment ratio, wherein the initial branch length is a second ratio of the initial patch length of the metal patch.

4. The medical transport device according to claim 1, characterized in that, The angle formed by the chamfer with the first side and the second side is 45 degrees. The chamfer length in the first direction and the chamfer width in the second direction are both the product of the initial chamfer side length and the third adjustment ratio. The initial chamfer side length is the second ratio of the initial patch length of the metal patch.

5. The medical transport device according to claim 1, characterized in that, The overlap length of the two metal patches in the first direction is the product of the initial overlap length and the fourth adjustment ratio, wherein the initial overlap length is the third ratio of the initial patch length of the metal patches. The gap width between the two metal patches in the second direction is the same as the feed width of the microstrip feed line in the first direction.

6. The medical transport device according to any one of claims 2, 3-5, characterized in that, The initial patch length is the ratio of the product of the speed of light in vacuum and a constant, where the constant product is the product between the center frequency of the planar antenna and the square root of the relative permittivity of the dielectric substrate.

7. The medical transport device according to claim 1, characterized in that, The feed width of the microstrip feed line in the first direction is determined using the calculation principle of the characteristic impedance of the microstrip feed line. And / or, the microstrip feed line extends along the second direction, and the center line of the microstrip feed line in the second direction is located at the center of the first direction of the overlap region.

8. The medical transport device according to claim 1, characterized in that, The two metal patches have the same geometry.

9. The medical transport device according to claim 1, characterized in that, At least one of the antenna and the signal processing module is located on the back of the bed board; The bed board is located on the upper end surface of the bed body, and the upper end surface has a recess. The recess on the upper end surface and the back of the bed board form an accommodating space to accommodate at least one of the antenna and the signal processing module.

10. The medical transport device according to claim 1, characterized in that, The signal processing module is also provided with a data transmission port, through which the signal processing module can communicate with external devices; And / or, the medical transport device further includes a guide rail fixedly connected to the bed body, and the bed board is slidably connected to the guide rail.

11. An antenna, characterized in that, The antenna includes: Dielectric substrate; Two metal patches are respectively disposed on the first surface and the second surface of the dielectric substrate, with the second surface opposite to the first surface; A microstrip feed line is disposed on the first surface, and its two ends are respectively connected to a metal patch and an RF feed port on the first surface; wherein... The two metal patches are arranged symmetrically about the center of the dielectric substrate at 180°. The projections of the two metal patches in the first direction of the dielectric substrate are spaced apart, and their projections in the second direction of the dielectric substrate overlap. The first direction and the second direction are perpendicular. The metal patches are provided with loading branches that extend along the first direction. The width of the loading branches in the second direction is smaller than the patch width of the metal patch in the second direction. The metal patches are rectangular patches with chamfers. The chamfers are located between the first side and the second side of the rectangular patch. The first side is the side of the rectangular patch closer to the edge of the dielectric substrate in the second direction, and the second side is the side of the rectangular patch closer to the middle of the dielectric substrate in the first direction.

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