Microwave antenna and cerebral hemorrhage detection system

Abstract

The utility model discloses a microwave antenna and a cerebral hemorrhage detection system, and relates to the technical field of biomedical engineering. Wherein the microwave antenna comprises a first curved surface dielectric layer (1a) and a second curved surface dielectric layer (1b); the first curved surface dielectric layer (1a) and the second curved surface dielectric layer (1b) are respectively provided with a first excitation port (36) and a second excitation port (55); wherein the first curved surface dielectric layer (1a) and the second curved surface dielectric layer (1b) are respectively provided with a plurality of groups of first radiation patches connected with the first excitation port (36) and a plurality of groups of second radiation patches connected with the second excitation port (55). The objective of the utility model is to solve at least one of the technical problems of ionizing radiation, high cost, high probability of missing gold first-aid time due to overlong time, unsuitability for bedside detection and pre-hospital first aid and the like in current CT and MRI brain image examination.

Description

TECHNICAL FIELD

[0001] The utility model relates to biomedical engineering technology, specifically a microwave antenna and cerebral hemorrhage detection system. BACKGROUND

[0002] At present, computed tomography (CT) and magnetic resonance imaging (MRI) are commonly used means for detecting cerebral hemorrhage in clinic. CT technology is the gold standard for early craniocerebral hemorrhage examination, which can accurately locate the hemorrhagic focus. But it uses X-ray as imaging medium, and the ionizing radiation generated during examination can cause cell deformation and canceration. MRI has high sensitivity to the slight changes of blood metabolites and brain tissue water content, but its examination time is too long, and it will take more than 15 minutes for a patient to perform a head scan, which may miss the golden emergency time. The above two devices also have the problem of high price, and the high equipment cost leads to hundreds of yuan for a craniocerebral CT or MRI examination. Moreover, the two devices are bulky and difficult to move, which are not suitable for bedside detection and pre-hospital emergency. Therefore, it is of great significance to develop a low-cost, non-invasive, non-ionizing radiation, rapid and portable detection technology for the early diagnosis and treatment of cerebral hemorrhage patients. SUMMARY

[0003] Therefore, the utility model provides a microwave antenna and cerebral hemorrhage detection system to solve at least one of the technical problems of ionizing radiation, high cost, long time, easy to miss the golden emergency time, not suitable for bedside detection and pre-hospital emergency, etc. in the current CT and MRI brain image examination.

[0004] In the first aspect, the utility model provides a microwave antenna, which comprises: a first curved surface dielectric layer and a second curved surface dielectric layer; a first excitation port and a second excitation port are respectively arranged on the first curved surface dielectric layer and the second curved surface dielectric layer.

[0005] Wherein, a plurality of groups of first radiation patches connected with the first excitation port and a plurality of groups of second radiation patches connected with the second excitation port are respectively arranged on the first curved surface dielectric layer and the second curved surface dielectric layer.

[0006] Preferably, the plurality of groups of first radiation patches and / or the plurality of groups of second radiation patches are respectively provided with at least one radiation patch or sub-radiation patch; wherein the at least one radiation patch or sub-radiation patch is connected with the first excitation port and / or the second excitation port through a feeding mechanism.

[0007] Preferably, each radiation patch or each sub-radiation patch in the plurality of groups of first radiation patches and / or the plurality of groups of second radiation patches is provided with an inward recess on one side of the feeding mechanism connected thereto, and the feeding mechanism is connected to the corresponding each radiation patch through the recess.

[0008] Preferably, each radiation patch or sub-radiation patch of the plurality of groups of first radiation patches is respectively configured with a corresponding first feeding mechanism slot on the corresponding first curved dielectric layer; wherein the feeding mechanism respectively connected to each radiation patch or sub-radiation patch of the plurality of groups of first radiation patches and the first excitation port is arranged in the first feeding mechanism slot.

[0009] Preferably, each radiation patch or sub-radiation patch of the plurality of groups of second radiation patches is respectively configured with a corresponding second feeding mechanism slot on the corresponding second curved dielectric layer; wherein the feeding mechanism respectively connected to each radiation patch or sub-radiation patch of the plurality of groups of second radiation patches and the second excitation port is arranged in the second feeding mechanism slot.

[0010] Preferably, the first feeding mechanism and / or the second feeding mechanism comprises a feeding line and first and second feeding points at both ends of the feeding line; wherein the first feeding point is connected to the plurality of groups of first radiation patches or the plurality of groups of second radiation patches; and the second feeding point is connected to the first excitation port and / or the second excitation port.

[0011] Preferably, each group of radiation patches in the plurality of groups of first radiation patches and / or the plurality of groups of second radiation patches is respectively provided with two sub-radiation patches; wherein the two sub-radiation patches are respectively provided with an inward recess on one side of the feeding mechanism connected thereto, and the feeding mechanism is connected to the corresponding radiation patch through the recess.

[0012] Preferably, the set distance between the opposite ends of the first curved dielectric layer with a first set curved arc and the second curved dielectric layer with a second set curved arc satisfies that the beam width corresponding to the set decibel on the main lobe of the directional diagram at the working frequency reaches a set angle.

[0013] Preferably, at the working frequency, the set decibel on the main lobe of the directional diagram corresponding to the microwave antenna is configured as 3 decibels.

[0014] Preferably, at the working frequency, the beam width corresponding to the set decibel on the main lobe of the directional diagram corresponding to the microwave antenna reaches a set angle of 120 degrees.

[0015] Preferably, the set distance between the opposite ends of the first curved dielectric layer with a first set arc and the second curved dielectric layer with a second set arc is configured as 177.50 millimeters.

[0016] Preferably, the first curved dielectric layer and the second curved dielectric layer correspond to the same shape.

[0017] Preferably, the first curved dielectric layer and the second curved dielectric layer correspond to the same shape.

[0018] Preferably, each sub-radiating patch in each group of first radiating patches corresponds to the same shape.

[0019] Preferably, each sub-radiating patch in each group of first radiating patches corresponds to the same shape.

[0020] Preferably, each sub-radiating patch in each group of second radiating patches corresponds to the same shape.

[0021] Preferably, each sub-radiating patch in each group of second radiating patches corresponds to the same shape.

[0022] Preferably, each sub-radiating patch in each group of first radiating patches and each sub-radiating patch in each group of second radiating patches correspond to the same shape; each sub-radiating patch in each group of first radiating patches and each sub-radiating patch in each group of second radiating patches correspond to a rectangular shape.

[0023] Preferably, the microwave antenna further comprises: a first ground layer; the first ground layer is arranged on one side of the first curved dielectric layer; the other side of the first curved dielectric layer is provided with the plurality of groups of first radiating patches.

[0024] Preferably, the first ground layer arranged on one side of the first curved dielectric layer covers one side of the first curved dielectric layer.

[0025] Preferably, the first ground layer arranged on one side of the first curved dielectric layer is made of metal material.

[0026] Preferably, the first ground layer arranged on one side of the first curved dielectric layer is made of copper.

[0027] Preferably, the microwave antenna further comprises: a second ground layer; the second ground layer is arranged on one side of the second curved dielectric layer; the other side of the second curved dielectric layer is provided with the plurality of groups of second radiating patches.

[0028] Preferably, the second ground layer arranged on one side of the second curved dielectric layer covers one side of the second curved dielectric layer.

[0029] Preferably, the material of the second ground layer arranged on one side of the second curved dielectric layer is configured as a metal material.

[0030] Preferably, the corresponding metal material of the second ground layer arranged on one side of the second curved dielectric layer is configured as copper.

[0031] Preferably, the first excitation port and the second excitation port are respectively configured as SMA interfaces.

[0032] Preferably, the microwave antenna further comprises an excitation source connected to the first excitation port and / or the second excitation port; wherein the excitation source is configured to send an excitation signal to the plurality of first radiation patches and / or the plurality of second radiation patches.

[0033] Preferably, the material of the first curved dielectric layer and the second curved dielectric layer is configured as one of the existing high molecular compounds formed by polymerization of polytetrafluoroethylene, Ticona, ceramic, polyimide, and tetrafluoroethylene.

[0034] Preferably, the first curved dielectric layer and the second curved dielectric layer are configured as one of a polytetrafluoroethylene plate, a Teflon plate, a Gore-Tex plate, and a Teflon plate.

[0035] Preferably, the material of each first radiation patch in the plurality of first radiation patches and each second radiation patch in the plurality of second radiation patches is configured as a metal material.

[0036] Preferably, the metal material of each first radiation patch in the plurality of first radiation patches and each second radiation patch in the plurality of second radiation patches is configured as copper.

[0037] In a second aspect, the utility model provides a kind of cerebral hemorrhage detection system, including or applying the microwave antenna as described above.

[0038] Preferably, a brain containing space is formed inside the first curved dielectric layer and the second curved dielectric layer; wherein the microwave antenna is configured to receive an input reflection coefficient signal (input reflection coefficient) corresponding to the brain in the brain containing space; wherein the input reflection coefficient signal is related to electromagnetic parameters corresponding to cerebral hemorrhage or brain hematoma or brain tissue.

[0039] Preferably, the cerebral hemorrhage detection system further comprises a processor; wherein the processor is configured to determine one or more of the presence of a hematoma corresponding to cerebral hemorrhage, the degree of cerebral hemorrhage and the location of the hematoma in the brain containing space based on the input reflection coefficient.

[0040] Preferably, the brain hemorrhage detection system further comprises a processor, wherein the processor is configured to control the excitation source to send microwave signals to the brain containing space through the corresponding microwave antenna of the first curved dielectric layer (1a) and the second curved dielectric layer (1b), and control the microwave antenna to receive the input reflection coefficient signal.

[0041] The utility model at least has following beneficial effect:

[0042] The utility model provides a microwave antenna and brain hemorrhage detection system to solve at least one technical problem of current CT and MRI brain image examination existing ionizing radiation, high cost, time is too long to cause easily missing golden first-aid time, not applicable to bedside detection and pre-hospital emergency etc. BRIEF DESCRIPTION OF DRAWINGS

[0043] The above and other objects, features and advantages of the utility model will become more apparent from the following description of the utility model embodiments with reference to the accompanying drawings, in which:

[0044] Figure 1 It is the structure schematic drawing of the microwave antenna of the utility model embodiment;

[0045] Figure 2 It is the first feed mechanism slot schematic drawing of the first curved dielectric layer of the microwave antenna of the utility model embodiment;

[0046] Figure 3 It is the RC equivalent circuit of biological tissue of the utility model embodiment;

[0047] Figure 4 It is the biological tissue complex resistance impedance track diagram of the utility model embodiment;

[0048] Figure 5 It is the structure schematic drawing of the microwave antenna of the utility model embodiment;

[0049] Figure 6 It is the standing wave ratio of each subradiation patch of the microwave antenna of the utility model embodiment;

[0050] Figure 7 It is the gain of 2D and 3D direction of each subradiation patch of the microwave antenna of the utility model embodiment;

[0051] Figure 8 It is the port schematic drawing of the vector network analyzer of the S parameter of each subradiation patch of the microwave antenna;

[0052] Figure 9 It is the S parameter of each subradiation patch of the microwave antenna of the utility model embodiment;

[0053] Figure 10 is a structure parameter diagram corresponding to the microwave antenna measured by the embodiment of the utility model;

[0054] Figure 11 is the S parameter of the microwave antenna corresponding to the microwave antenna measured by the embodiment of the utility model;

[0055] Figure 12 is the standing wave ratio of the microwave antenna corresponding to the microwave antenna measured by the embodiment of the utility model;

[0056] Figure 13 is the gain corresponding to the 2D and 3D direction of the microwave antenna of the embodiment of the utility model;

[0057] Figure 14 is the curve comparison diagram corresponding to the microwave antenna and the microwave antenna with the head part bionic model of the embodiment of the utility model;

[0058] Figure 15 is the curve of three kinds of bleeding amount under 1.94-1.96GHz of the embodiment of the utility model;

[0059] Figure 16 is the curve of two different positions under 1.94-1.96GHz of the embodiment of the utility model. DETAILED DESCRIPTION

[0060] The utility model is described below based on the embodiments, but it is worth mentioning that the utility model is not limited to these embodiments. In the following detailed description of the utility model, some specific details are described in detail. However, those skilled in the art can also fully understand the utility model for the part not described in detail.

[0061] In addition, those skilled in the art should understand that the provided drawings are only for the purpose of illustrating the purpose, features and advantages of the utility model, and the drawings are not actually drawn according to the proportion.

[0062] At the same time, unless the context clearly requires, the "includes", "contains" and similar words in the entire specification and claims should be interpreted as the inclusive meaning rather than the exclusive or exhaustive meaning; that is, the meaning of "including but not limited to".

[0063] Figure 1 is the structure diagram corresponding to the microwave antenna of the embodiment of the utility model. As Figure 1 ​​​As shown, the proposed microwave antenna is applied to different tissues in the brain, including: a first curved dielectric layer 1a and a second curved dielectric layer 1b; the first curved dielectric layer 1a and the second curved dielectric layer 1b are respectively provided with a first excitation port 36 and a second excitation port 55; wherein the first curved dielectric layer 1a and the second curved dielectric layer 1b are respectively provided with a plurality of groups of first radiation patches connected with the first excitation port 36 and a plurality of groups of second radiation patches connected with the second excitation port 55. To solve at least one of the technical problems of the current CT and MRI brain image examination, such as ionizing radiation, high cost, long time, easy to miss the golden first-aid time, not suitable for bedside detection and pre-hospital emergency, etc.

[0064] In embodiments of the present disclosure, the plurality of groups of first radiation patches and / or the plurality of groups of second radiation patches are respectively provided with at least one radiation patch or sub-radiation patch; wherein the at least one radiation patch or sub-radiation patch is respectively connected with the first excitation port 36 and / or the second excitation port 55 through a feeding mechanism. Wherein the at least one radiation patch or sub-radiation patch corresponding to each group of radiation patches in the plurality of groups of first radiation patches and / or the plurality of groups of second radiation patches is respectively uniformly distributed on the first curved dielectric layer 1a and / or the second curved dielectric layer 1b.

[0065] In embodiments of the present disclosure and other possible embodiments, each group of radiation patches in the plurality of groups of first radiation patches and / or the plurality of groups of second radiation patches is respectively provided with two sub-radiation patches. Wherein the two radiation patches corresponding to each group of radiation patches in the plurality of groups of first radiation patches and / or the plurality of groups of second radiation patches are respectively uniformly distributed on the first curved dielectric layer 1a and / or the second curved dielectric layer 1b. Wherein the first excitation port 36 and the second excitation port 55 are respectively configured as an SMA (SubMiniature version A) interface.

[0066] In embodiments of the present disclosure, the first curved dielectric layer 1a and the second curved dielectric layer 1b correspond to the same shape; wherein the first curved dielectric layer 1a and the second curved dielectric layer 1b correspond to the same shape, which is configured as a rectangle.

[0067] In embodiments of the present disclosure, each sub-radiation patch in each group of first radiation patches in the plurality of groups of first radiation patches corresponds to the same shape; wherein each sub-radiation patch in each group of first radiation patches with the same shape corresponds to a rectangular shape.

[0068] In the embodiments of this disclosure, each sub-radiating patch in each group of the plurality of second radiating patches has the same shape; wherein, the shape of each sub-radiating patch in each group of second radiating patches with the same shape is configured as a rectangle.

[0069] In the embodiments of this disclosure, each sub-radiating patch of each group of first radiating patches and each sub-radiating patch of each group of second radiating patches have the same shape; wherein, the shape of each sub-radiating patch of each group of first radiating patches and each sub-radiating patch of each group of second radiating patches with the same shape is configured as a rectangle.

[0070] In the embodiments of this disclosure, each of the plurality of first radiating patches and / or the plurality of second radiating patches is provided with two sub-radiating patches; wherein, each of the two sub-radiating patches is provided with an inward groove on one side of the power feeding mechanism connected to it, and the power feeding mechanism is connected to the corresponding radiating patch through the groove.

[0071] For example, in embodiments of this disclosure and other possible embodiments, such as Figure 1 As shown, the number of the first groups corresponding to the multiple groups of first radiating patches is configured as 4, and each of the 4 groups of first radiating patches includes two radiating patches. The 8 radiating patches corresponding to the 4 groups of first radiating patches are evenly distributed on the first curved dielectric layer 1a.

[0072] Specifically, in the embodiments of this disclosure and other possible embodiments, such as Figure 1 As shown, the first radiation patch corresponding to the first group includes: a first sub-radiation patch 21 and a second sub-radiation patch 22; the first radiation patch corresponding to the second group includes: a third sub-radiation patch 23 and a fourth sub-radiation patch 24; the first radiation patch corresponding to the third group includes: a fifth sub-radiation patch 25 and a sixth sub-radiation patch 26; and the first radiation patch corresponding to the fourth group includes: a seventh sub-radiation patch 27 and an eighth sub-radiation patch 28.

[0073] More specifically, in embodiments of this disclosure and other possible embodiments, such as Figure 1As shown, the first, second, third, fourth, fifth, sixth, seventh and eighth sub-radiation patches 21, 22, 23, 24, 25, 26, 27 and 28 correspondingly have the same shape. Further, the first, second, third, fourth, fifth, sixth, seventh and eighth sub-radiation patches 21, 22, 23, 24, 25, 26, 27 and 28 correspondingly have the shape of a rectangle.

[0074] For example, in embodiments of the present disclosure and other possible embodiments, as Figure 1 As shown, the four groups of second radiation patches correspondingly have the number of 4, and each of the four groups of second radiation patches includes two radiation patches. The eight radiation patches of the four groups of second radiation patches are uniformly distributed on the second curved dielectric layer 1b.

[0075] Specifically, in embodiments of the present disclosure and other possible embodiments, as Figure 1 As shown, the first group of second radiation patches includes the ninth and tenth sub-radiation patches 29 and 40, the second group of second radiation patches includes the eleventh and twelfth sub-radiation patches 41 and 42, the third group of second radiation patches includes the thirteenth and fourteenth sub-radiation patches 43 and 44, and the fourth group of second radiation patches includes the fifteenth and sixteenth sub-radiation patches 45 and 46.

[0076] More specifically, in embodiments of the present disclosure and other possible embodiments, Figure 1 As shown, the ninth, tenth, eleventh, twelfth, thirteenth, fourteenth, fifteenth and sixteenth sub-radiation patches 29, 40, 41, 42, 43, 44, 45 and 46 correspondingly have the same shape. Further, the ninth, tenth, eleventh, twelfth, thirteenth, fourteenth, fifteenth and sixteenth sub-radiation patches 29, 40, 41, 42, 43, 44, 45 and 46 correspondingly have the shape of a rectangle.

[0077] In embodiments of the present disclosure, each radiation patch or sub-radiation patch of the plurality of groups of first radiation patches is respectively configured with a corresponding first feeding mechanism slot on the corresponding first curved dielectric layer la; wherein the feeding mechanism respectively connected with each radiation patch or sub-radiation patch of the plurality of groups of first radiation patches and the first excitation port 36 is arranged in the first feeding mechanism slot.

[0078] In embodiments and other possible embodiments of the present disclosure, the first feeding mechanism slot is configured, including: a plurality of groups of first patch feeding mechanism slots consistent with the number of the plurality of groups of first radiation patches and a plurality of groups of first summary feeding mechanism slots connected with the plurality of groups of first patch feeding mechanism slots; wherein one end of each group of first patch feeding mechanism slots in the plurality of groups of first patch feeding mechanism slots is respectively connected with each radiation patch or sub-radiation patch of the corresponding each group of first radiation patches, the other end of each group of first patch feeding mechanism slots in the plurality of groups of first patch feeding mechanism slots is connected with one end of the plurality of groups of first summary feeding mechanism slots, and the other end of the plurality of groups of first summary feeding mechanism slots is connected with the first excitation port 36.

[0079] In embodiments and other possible embodiments of the present disclosure, as shown in Figure 1 The plurality of groups of first patch feeding mechanism slots includes: a first sub-feeding mechanism slot respectively connected with the first sub-radiation patch 21 and the second sub-radiation patch 22, a second sub-feeding mechanism slot respectively connected with the third sub-radiation patch 23 and the fourth sub-radiation patch 24, a third sub-feeding mechanism slot respectively connected with the fifth sub-radiation patch 25 and the sixth sub-radiation patch 26, and a fourth sub-feeding mechanism slot respectively connected with the seventh sub-radiation patch 27 and the eighth sub-radiation patch 28.

[0080] In embodiments and other possible embodiments of the present disclosure, the shape of each group of first patch feeding mechanism slots (i.e., the first sub-feeding mechanism slot, the second sub-feeding mechanism slot, the third sub-feeding mechanism slot, and the fourth sub-feeding mechanism slot) in the plurality of groups of first patch feeding mechanism slots is respectively configured as a concave shape; the concave arm of each group of first patch feeding mechanism slots is respectively connected with each radiation patch or sub-radiation patch of the corresponding plurality of groups of first radiation patches.

[0081] In embodiments and other possible embodiments of the present disclosure, the first group of sub-summation feeding mechanism slots includes a first sub-summation feeding mechanism slot 31, a second sub-summation feeding mechanism slot 32, a third sub-summation feeding mechanism slot 33, and a fourth sub-summation feeding mechanism slot 34, and a first general feeding mechanism slot 35 connected to the first sub-summation feeding mechanism slot 31, the second sub-summation feeding mechanism slot 32, the third sub-summation feeding mechanism slot 33, and the fourth sub-summation feeding mechanism slot 34, respectively. One end of the first general feeding mechanism slot 35 is connected to the first sub-summation feeding mechanism slot 31, the second sub-summation feeding mechanism slot 32, the third sub-summation feeding mechanism slot 33, and the fourth sub-summation feeding mechanism slot 34, respectively, and the other end of the first general feeding mechanism slot 35 is connected to the first excitation port 36.

[0082] In embodiments and other possible embodiments of the present disclosure, as shown in Figure 1 The shapes of the first sub-feeding mechanism slot 31, the second sub-feeding mechanism slot 32, the third sub-feeding mechanism slot 33, and the fourth sub-feeding mechanism slot 34 are respectively configured as concave shapes. The concave arms corresponding to each of the first sub-feeding mechanism slot 31, each of the second sub-feeding mechanism slot 32, each of the third sub-feeding mechanism slot 33, and each of the fourth sub-feeding mechanism slot 34 are respectively connected to the first sub-radiating patch 21, the second sub-radiating patch 22, the third sub-radiating patch 23, the fourth sub-radiating patch 24, the fifth sub-radiating patch 25, the sixth sub-radiating patch 26, the seventh sub-radiating patch 27, and the eighth sub-radiating patch 28.

[0083] In embodiments and other possible embodiments of the present disclosure, the first group of sub-summation feeding mechanism slots includes a first sub-summation feeding mechanism slot 31, a second sub-summation feeding mechanism slot 32, a third sub-summation feeding mechanism slot 33, and a fourth sub-summation feeding mechanism slot 34, and a first general feeding mechanism slot 35 connected to the first sub-summation feeding mechanism slot 31, the second sub-summation feeding mechanism slot 32, the third sub-summation feeding mechanism slot 33, and the fourth sub-summation feeding mechanism slot 34, respectively. One end of the first general feeding mechanism slot 35 is connected to the first sub-summation feeding mechanism slot 31, the second sub-summation feeding mechanism slot 32, the third sub-summation feeding mechanism slot 33, and the fourth sub-summation feeding mechanism slot 34, respectively, and the other end of the first general feeding mechanism slot 35 is connected to the first excitation port 36.

[0084] In embodiments and other possible embodiments of the present disclosure, as shown in Figure 1As shown, the shapes of the adjacent first sub-aggregated feeding mechanism groove 31, the second sub-aggregated feeding mechanism groove 32, the third sub-aggregated feeding mechanism groove 33 and the fourth sub-aggregated feeding mechanism groove 34 are respectively configured as concave shapes; wherein the corresponding concave arms of each first sub-aggregated feeding mechanism groove 31, each second sub-aggregated feeding mechanism groove 32, each third sub-aggregated feeding mechanism groove 33 and each fourth sub-aggregated feeding mechanism groove 34 are respectively connected with the first, second, third and fourth sub-radiating patches 21, 22, 23 and 24 through the corresponding first patch feeding mechanism grooves (i.e. first, second, third and fourth sub-feeding mechanism grooves).

[0085] Figure 2 is a schematic view of a first feeding mechanism groove provided by a first curved dielectric layer in a microwave antenna according to an embodiment of the present application. As shown, Figure 2 the first feeding mechanism groove provided by the first curved dielectric layer in the microwave antenna is configured as a concave shape. For example, one end of the first and second concave arms 212 and 222 of the first sub-feeding mechanism groove in the first feeding mechanism groove is respectively connected with the first and second sub-radiating patches 21 and 22, and the other end of the first sub-feeding mechanism groove in the first feeding mechanism groove is connected with the first sub-aggregated feeding mechanism groove 31; one end of the third and fourth concave arms 232 and 242 of the second sub-feeding mechanism groove in the first feeding mechanism groove is respectively connected with the third and fourth sub-radiating patches 23 and 24, and the other end of the second sub-feeding mechanism groove in the first feeding mechanism groove is connected with the second sub-aggregated feeding mechanism groove 32.

[0086] In an embodiment of the present application, each radiation patch or each sub-radiation patch in the plurality of groups of first radiation patches and / or the plurality of groups of second radiation patches is provided with an inward groove on one side of the feeding mechanism connected therewith, and the feeding mechanism is connected with each corresponding radiation patch through the groove.

[0087] As shown, Figure 2As shown, the first sub-radiating patch 21 and the second sub-radiating patch 22 are respectively provided with a first recess 211 and a second recess 221, and one end of a first concave arm 212 and a second concave arm 222 of a first sub-feeding mechanism groove in the first feeding mechanism groove is respectively connected with the first recess 211 provided in the first sub-radiating patch 21 and the second recess 221 provided in the second sub-radiating patch 22. For another example, the third sub-radiating patch 23 and the fourth sub-radiating patch 24 are respectively provided with a third recess 231 and a fourth recess 241, and one end of a third concave arm 232 and a fourth concave arm 24 of a second sub-feeding mechanism groove in the first feeding mechanism groove is respectively connected with the third recess 231 provided in the third sub-radiating patch 23 and the fourth recess 241 provided in the fourth sub-radiating patch 24. Similarly, each radiating patch or each sub-radiating patch in the plurality of groups of second radiating patches is provided with an inward recess on one side of the feeding mechanism connected therewith, and the feeding mechanism is connected with each corresponding radiating patch through the recess in the connection mode of the plurality of groups of first radiating patches, which will not be described in detail herein.

[0088] In the embodiments of the present disclosure, each radiating patch or sub-radiating patch of the plurality of groups of second radiating patches is respectively configured with a corresponding second feeding mechanism groove on the corresponding second curved dielectric layer 1b; and the feeding mechanism respectively connected with the plurality of groups of second radiating patches and the second excitation port 55 is arranged in the second feeding mechanism groove.

[0089] In the embodiments of the present disclosure and other possible embodiments, the second feeding mechanism groove is configured, including a plurality of groups of second patch feeding mechanism grooves consistent with the number of the plurality of groups of second radiating patches and a plurality of groups of second summary feeding mechanism grooves connected with the plurality of groups of second patch feeding mechanism grooves; one end of each group of second patch feeding mechanism grooves in the plurality of groups of second patch feeding mechanism grooves is respectively connected with each radiating patch or sub-radiating patch of each corresponding group of second radiating patches, the other end of each group of second patch feeding mechanism grooves in the plurality of groups of second patch feeding mechanism grooves is connected with one end of the plurality of groups of second summary feeding mechanism grooves, and the other end of the plurality of groups of second summary feeding mechanism grooves is connected with the second excitation port 55.

[0090] In the embodiments of the present disclosure and other possible embodiments, as Figure 1As shown, the plurality of groups of second patch feeding mechanism slots include: a fifth sub feeding mechanism slot connected with the ninth sub-radiating patch 29 and the tenth sub-radiating patch 40 respectively, a sixth sub feeding mechanism slot connected with the eleventh sub-radiating patch 41 and the twelfth sub-radiating patch 42 respectively, a seventh sub feeding mechanism slot connected with the thirteenth sub-radiating patch 43 and the fourteenth sub-radiating patch 44 respectively, and an eighth sub feeding mechanism slot connected with the fifteenth sub-radiating patch 45 and the sixteenth sub-radiating patch 46 respectively.

[0091] In embodiments and other possible embodiments of the present disclosure, the shape corresponding to each group (one) of the plurality of groups of second patch feeding mechanism slots (i.e., the fifth sub feeding mechanism slot, the sixth sub feeding mechanism slot, the seventh sub feeding mechanism slot, and the eighth sub feeding mechanism slot) is respectively configured as a concave shape; the concave arms of each group of second patch feeding mechanism slots are respectively connected with each radiating patch or sub-radiating patch of the corresponding plurality of groups of second radiating patches.

[0092] In embodiments and other possible embodiments of the present disclosure, the plurality of groups of second summary feeding mechanism slots include: a fifth sub summary feeding mechanism slot 51, a sixth sub summary feeding mechanism slot 52, a seventh sub summary feeding mechanism slot 53, an eighth sub summary feeding mechanism slot 54, and a second overall feeding mechanism slot 54-1 connected with the fifth sub summary feeding mechanism slot 51, the sixth sub summary feeding mechanism slot 52, the seventh sub summary feeding mechanism slot 53, and the eighth sub summary feeding mechanism slot 54 respectively; wherein one end of the second overall feeding mechanism slot 54-1 is connected with the fifth sub summary feeding mechanism slot 51, the sixth sub summary feeding mechanism slot 52, the seventh sub summary feeding mechanism slot 53, and the eighth sub summary feeding mechanism slot 54 respectively, and the other end of the second overall feeding mechanism slot 54-1 is connected with the second excitation port 55.

[0093] In embodiments and other possible embodiments of the present disclosure, as Figure 1As shown, the shapes of the fifth, sixth, seventh and eighth sub-aggregated feeding mechanism grooves 51, 52, 53 and 54 are respectively configured as concave shapes; wherein the corresponding concave arms of each first, second, third and fourth sub-feeding mechanism groove 31, 32, 33 and 34 are respectively connected with the ninth, tenth, eleventh, twelfth, thirteenth, fourteenth, fifteenth and sixteenth radiation patches 29, 40, 41, 42, 43, 44, 45 and 46 through the second patch feeding mechanism groove (i.e., fifth, sixth, seventh and eighth sub-feeding mechanism grooves).

[0094] Similarly, Figure 2 , the second feeding mechanism groove of the second curved dielectric layer in the microwave antenna is configured as a concave shape. For example, one end of the fifth and sixth concave arms of the fifth sub-feeding mechanism groove in the second feeding mechanism groove is respectively connected with the ninth and tenth radiation patches 29 and 40, and the other end of the fifth sub-feeding mechanism groove in the second feeding mechanism groove is connected with the eighth aggregated feeding mechanism groove 54; one end of the seventh and eighth concave arms of the sixth sub-feeding mechanism groove in the first feeding mechanism groove is respectively connected with the eleventh and twelfth radiation patches 41 and 42, and the other end of the sixth sub-feeding mechanism groove in the second feeding mechanism groove is connected with the seventh aggregated feeding mechanism groove 53.

[0095] In an embodiment of the present disclosure, the first feeding mechanism corresponding to the plurality of groups of first radiation patches and / or the second feeding mechanism corresponding to the plurality of groups of second radiation patches comprises: a feeding wire and first and second feeding points at both ends of the feeding wire; wherein the first feeding point is connected with the plurality of groups of first radiation patches or the plurality of groups of second radiation patches; and the second feeding point is connected with the first and / or second excitation port 36 and 55.

[0096] In an embodiment and other possible embodiments of the present disclosure, the feeding wire corresponding to the first feeding mechanism is laid in the first feeding mechanism groove, and the first feeding point corresponding to the first feeding mechanism is arranged at the connection of each radiation patch or sub-radiation patch of each group of first radiation patches corresponding to the plurality of groups of first radiation patches or each radiation patch or sub-radiation patch inward recess.

[0097] Similarly, in the embodiments of the present disclosure and other possible embodiments, the second feeding mechanism corresponds to a feeding line laid in a second feeding mechanism groove, and the first feeding point corresponding to the second feeding mechanism is arranged at the connection of each radiation patch or sub-radiation patch of each group of first radiation patches corresponding to the second radiation patches.

[0098] In the embodiments of the present disclosure, the microwave antenna further comprises: a first ground layer; the first ground layer is arranged on one side of the first curved dielectric layer 1a; the other side of the first curved dielectric layer 1a is provided with the plurality of groups of first radiation patches; wherein the first ground layer arranged on one side of the first curved dielectric layer 1a covers one side of the first curved dielectric layer 1a; wherein the material of the first ground layer arranged on one side of the first curved dielectric layer 1a is configured as a metal material; wherein the metal material corresponding to the first ground layer arranged on one side of the first curved dielectric layer 1a is configured as copper.

[0099] In the embodiments of the present disclosure, the microwave antenna further comprises: a second ground layer; the second ground layer is arranged on one side of the second curved dielectric layer 1b; the other side of the second curved dielectric layer 1b is provided with the plurality of groups of second radiation patches; wherein the second ground layer arranged on one side of the second curved dielectric layer 1b covers one side of the second curved dielectric layer 1b; wherein the material of the second ground layer arranged on one side of the second curved dielectric layer 1b is configured as a metal material; wherein the metal material corresponding to the second ground layer arranged on one side of the second curved dielectric layer 1b is configured as copper.

[0100] In the embodiments of the present disclosure and other possible embodiments, the first ground layer and the second ground layer are made of a material with good electrical conductivity. For example, brass, which is tightly attached to the first curved dielectric layer 1a and the second curved dielectric layer 1b (dielectric layer, including: the first curved dielectric layer 1a and the second curved dielectric layer 1b); the corresponding areas of the first ground layer and the second ground layer respectively cover the entire lower surface of the dielectric substrate (dielectric layer, including: the first curved dielectric layer 1a and the second curved dielectric layer 1b).

[0101] In the embodiments of the present disclosure, the material corresponding to each first radiation patch in the plurality of groups of first radiation patches and each second radiation patch in the plurality of groups of second radiation patches is configured as a metal material; and / or, the metal material corresponding to each first radiation patch in the plurality of groups of first radiation patches and each second radiation patch in the plurality of groups of second radiation patches is configured as copper.

[0102] In the embodiments and other possible embodiments of the present disclosure, the shapes corresponding to the first sub-radiating patch 21, the second sub-radiating patch 22, the third sub-radiating patch 23, the fourth sub-radiating patch 24, the fifth sub-radiating patch 25, the sixth sub-radiating patch 26, the seventh sub-radiating patch 27, the eighth sub-radiating patch 28 of the plurality of groups of first radiating patches and the ninth sub-radiating patch 29, the tenth sub-radiating patch 40, the eleventh sub-radiating patch 41, the twelfth sub-radiating patch 42, the thirteenth sub-radiating patch 43, the fourteenth sub-radiating patch 44, the fifteenth sub-radiating patch 45, the sixteenth sub-radiating patch 46 of the plurality of groups of second radiating patches are rectangular, and the area corresponding to each rectangle is 2732.05mm 2 The copper has high electrical conductivity.

[0103] In the embodiments and other possible embodiments of the present disclosure, the shapes corresponding to the first sub-radiating patch 21, the second sub-radiating patch 22, the third sub-radiating patch 23, the fourth sub-radiating patch 24, the fifth sub-radiating patch 25, the sixth sub-radiating patch 26, the seventh sub-radiating patch 27, the eighth sub-radiating patch 28 of the plurality of groups of first radiating patches and the ninth sub-radiating patch 29, the tenth sub-radiating patch 40, the eleventh sub-radiating patch 41, the twelfth sub-radiating patch 42, the thirteenth sub-radiating patch 43, the fourteenth sub-radiating patch 44, the fifteenth sub-radiating patch 45, the sixteenth sub-radiating patch 46 of the plurality of groups of second radiating patches are rectangular, and the area corresponding to each rectangle is 2732.05mm

[0104] In the embodiments and other possible embodiments of the present disclosure, in combination with the electromagnetic properties of brain hemorrhage tissue and normal brain tissue at different microwave frequencies, the initial working frequency range of 1-3 GHz is set as a relatively wide microwave frequency range. The selection of 1-3 GHz has the following advantages: first, the microwave in this frequency range has a certain penetration into biological tissue, such as in medical imaging applications, microwave in this frequency range can realize imaging detection of internal human tissue; second, the microwave in this frequency range is mature and easy to implement in terms of generation, transmission, reception, and detection of related equipment and technology, and related technologies and equipment such as common Wi-Fi have been widely applied and developed; third, the electromagnetic properties of brain hemorrhage tissue and normal brain tissue in this frequency range are significantly different, which helps to improve the accuracy and sensitivity of detection; fourth, the thermal effect and other potential biological effects of microwave energy in this frequency range on human tissue are relatively small, and reasonable power control ensures the safety of experimental research.

[0105] In embodiments of the present disclosure, the first curved dielectric layer 1a and the second curved dielectric layer 1b are configured with a material selected from one of PTFE (polytetrafluoroethylene), Taconic, ceramic, polyimide, and a high polymer compound formed by polymerization of tetrafluoroethylene.

[0106] In embodiments of the present disclosure and other possible embodiments, the material selection of the first curved dielectric layer 1a and the second curved dielectric layer 1b (antenna substrate or dielectric layer 1) mainly considers low dielectric loss, low dielectric constant, and the need to adapt to high-frequency applications. Suitable substrate materials include PTFE (polytetrafluoroethylene), Taconic, ceramic filling, polyimide (PI), and F4B (a high polymer compound formed by polymerization of tetrafluoroethylene) board.

[0107] Considering the performance, plasticity, and cost-effectiveness of the material, F4B (a high polymer compound formed by polymerization of tetrafluoroethylene, special polytetrafluoroethylene) is selected as the main material. This material has the characteristics of low dielectric constant, low dielectric loss, low moisture absorption, and isotropy. It can be easily cut into various shapes and can resist the erosion of solutions and reagents used in the etching and through-hole plating processes. It is commonly used in the manufacture of high-frequency PCB boards such as power dividers, couplers, combiners, power amplifiers, dry amplifiers, base stations, and 4G antennas.

[0108] In embodiments of the present disclosure, the set distance between the opposite ends of the first curved dielectric layer 1a with a first set curvature and the second curved dielectric layer 1b with a second set curvature satisfies that the beam width corresponding to the set decibels on the main lobe of the directional diagram at the working frequency reaches a set angle; wherein the set decibels on the main lobe of the directional diagram corresponding to the microwave antenna at the working frequency are configured as 3 decibels; wherein the beam width corresponding to the set decibels on the main lobe of the directional diagram corresponding to the microwave antenna at the working frequency reaches a set angle of 120 degrees; and wherein the set distance between the opposite ends of the first curved dielectric layer 1a with a first set curvature and the second curved dielectric layer 1b with a second set curvature is configured as 177.50 millimeters.

[0109] In the embodiments and other possible embodiments of the present disclosure, the working principle of the microwave antenna is introduced as follows. Electromagnetic waves with a wavelength between 1 m and 1 mm and a frequency between 300 MHz and 300 GHz are called microwaves, which have the characteristics of short wavelength and high frequency. Considering the penetration of microwaves into the brain, the frequency of microwaves used for brain detection is usually below 3 GHz. When microwaves pass through the interface between two different media, transmission, absorption and reflection phenomena occur. Generally, the waves passing through the interface of the first medium, the waves reflected back from the interface of the first medium and the waves entering the second medium are defined as incident waves, reflected waves and transmitted waves respectively. The transmission characteristics of microwaves in the medium can be characterized by the related parameters of incident waves, reflected waves and transmitted waves, which are directly related to the properties of the medium, which constitutes the theoretical basis for microwave detection of dielectric properties of the medium. At the same time, in the embodiments and other possible embodiments of the present disclosure, the basic theory of electromagnetic field is introduced as follows.

[0110] Conductivity, commonly denoted by , is used to describe the ease of flow of electric charge in a substance. The larger the dielectric constant , the stronger the ability to bind electric charges. The relationship between the electric field strength and the conductivity , the dielectric constant can be represented by Maxwell's equations:

[0111] (2-1)

[0112] (2-2)

[0113] (2-3)

[0114] (2-4)

[0115] where represents the vector differential operator, which is used to represent the curl of the electric field strength .

[0116] where represents the electric field strength, unit ( ); represents the magnetic field strength, unit ( ); represents the magnetic flux strength, unit (T); represents the electric displacement, unit ( ); represents the current intensity, unit ( ); ρ (C / m3) is the position vector; is the angular frequency, and

[0117] magnetic flux density and electric displacement are determined by the electromagnetic properties of the medium, when the medium is a homogeneous medium, the relationship between the vector field and the medium can be expressed as:

[0118] (2-5)

[0119] (2-6)

[0120] (2-7)

[0121] wherein =8.854×10 -12 is the permittivity in vacuum; denotes the relative permittivity of the medium; is the permeability in vacuum; denotes the relative permeability of the medium; denotes the electrical conductivity of the medium, with the unit (S / m).

[0122] An insulator that can be polarized by an electric field is called a dielectric. In an ideal dielectric, there are bound charges, when an external electric field is applied, these bound charges move within a small local range, generating polarization, so that the dielectric shows electrical properties on a macroscopic scale, and these polarized charges will produce a new electric field that affects the original external electric field.

[0123] In electromagnetics, the dielectric properties of an object are usually described by electrical conductivity and permittivity. Permittivity represents the ability of a dielectric to bind charges, and electrical conductivity is used to describe the size of the electric field generated by a unit of charge during polarization. When the permittivity is expressed in the form of a complex number, we can get:

[0124] (2-8)

[0125] wherein, denotes the permittivity in vacuum; denotes the relative permittivity; denotes the dielectric loss; denotes the electrical conductivity; denotes the angular frequency, represents the current density, in electromagnetic detection, is usually negligible.

[0126] Figure 3 ​​It is the RC equivalent circuit of the biological tissue of the embodiment of the utility model. Figure 3 As shown in the figure, Re represents extracellular fluid resistance, Ri represents intracellular fluid resistance, and Rm and Cm represent the resistance and capacitance of the cell membrane respectively. There are conductive ions in the intercellular substance of the biological tissue, and the cell membrane is a semi-permeable membrane that can selectively pass part of the ions, so the structure and physiological and pathological state of the biological tissue can be directly or indirectly reflected by the dielectric properties of the biological tissue. Since the phospholipid bilayer of the cell membrane has capacitance characteristics, the electrical properties of the biological tissue will change with the change of the frequency of the applied excitation signal, and can be roughly represented by the cell RC equivalent circuit as shown in the figure. Figure 3

[0127] On this basis, the Cole brothers proposed the Cole-Cole theory to more accurately represent the impedance properties of the biological tissue, which uses a constant phase element (CPE) related to the frequency to replace the equivalent membrane capacitance in the formula (2-8), and the complex impedance of the constant phase element is represented as follows: Figure 1

[0128] (2-9)

[0129] Wherein represents the complex impedance of the constant phase element, represents the current density, c represents the capacitance value of the capacitor, is the frequency; , which depends on factors such as the capacitive component of the cell membrane, the resistive component of the cell membrane, and the roughness of the cell membrane. When , the CPE is regarded as an ideal capacitor.

[0130] Figure 4 It is the complex resistance impedance locus diagram of the biological tissue of the embodiment of the utility model. As shown in the figure, Figure 4 represents impedance, the abscissa ( ) represents equivalent resistance, and the ordinate ( ) represents equivalent capacitance; is the intersection of the low-frequency end and the real axis, that is, the impedance value of direct current; is the intersection of the high-frequency end and the real axis, that is, the impedance value when the frequency is infinite; is the characteristic frequency (CF) of the tissue. As can be seen from the figure, when the frequency of the applied excitation signal is equal to CF, the absolute value of the equivalent capacitance ( ) is maximum. The impedance properties of the biological tissue can be described by the following formula:

[0131] ​​​(2-10)

[0132] wherein, is the dispersion coefficient, and when = 1, the center of the impedance circular arc trajectory falls exactly on the R axis.

[0133] In the embodiments of the present disclosure and other possible embodiments, the human head is symmetrical, composed of left and right hemispheres, and has a complex shape and curve, and the radiation range of the traditional planar antenna is difficult to completely cover the entire head. Further, the present disclosure proposes a conformal array microwave antenna, the shape of which is consistent with the head shape, and the antenna array surface (the first curved dielectric layer 1a and the second curved dielectric layer 1b respectively provided with a plurality of groups of first radiation patches and a plurality of groups of second radiation patches) of the microwave antenna is "conformal" to the head shape, enhancing the adaptability of the microwave antenna, while reducing the attenuation and distortion of the signal in the transmission path due to factors such as path changes, reflections and scattering. For the conformal array microwave antenna, since the antenna is placed on the surface of the head, the conformal array microwave antenna must have the characteristics of low profile, i.e. the height or thickness of the antenna should be as small as possible, to avoid causing more electromagnetic radiation to the human body, while ensuring the comfort and safety of wearing. The conformal array microwave antenna also needs to have the characteristics of easy conforming, i.e. the constituent units of the antenna array should be able to adjust the shape and layout flexibly to match the complex curve of the head surface.

[0134] A symmetrical dual-channel conformal array antenna (microwave antenna) that directly matches the head tissue is designed in this paper, and the CST electromagnetic simulation software is used to optimize the design of the dielectric matching antenna unit, finally determine the size of the antenna, and test the performance.

[0135] According to the theoretical analysis in the foregoing, the design steps of the antenna unit can be summarized.

[0136] (1) Determine the set resonant frequency of the antenna , select the appropriate dielectric substrate (the first dielectric layer and the second dielectric layer corresponding to the first curved dielectric layer 1a or the second curved dielectric layer 1b, respectively corresponding to the set size 1× 1× h ), representing the conductivity of the dielectric base, the thickness of the dielectric substrate and the relative dielectric constant :

[0137] (2) In order to produce high-efficiency radiation, the width of the rectangular patch of the microstrip antenna (each radiation patch or sub-radiation patch of the plurality of groups of first radiation patches and the plurality of groups of second radiation patches) is calculated from formula (3-1) :

[0138] (3-1)

[0139] (3) The equivalent dielectric constant of the microstrip transmission line (the feeding mechanism or the feeding line corresponding to the feeding mechanism) is calculated from formula (3-2) :

[0140] (3-2)

[0141] (4) The stretching length is calculated by substituting the sub-radiating patch width calculated in formula (3-1) into formula (3-3) :

[0142] (3-3)

[0143] (5) The and calculated in steps (3) and (4) are substituted into formula (3-4) to calculate the sub-radiating patch length :

[0144] (3-4)

[0145] (6) The parameters of the microwave antenna are optimized to obtain the required size.

[0146] Based on the 1× 1× (first sub-length, first sub-width and first thickness) corresponding to the first dielectric layer and the 2× 2 corresponding to each radiating patch or sub-radiating patch on the first dielectric layer and the number of radiating patches or sub-radiating patches, the first length, the first width and the first thickness of the first curved dielectric layer 1a are determined. For example, the number of radiating patches or sub-radiating patches is 8, and every 2 radiating patches or sub-radiating patches form a group of first radiating patches, and there are 4 groups of first radiating patches, so the first length, the first width and the first thickness of the first curved dielectric layer 1a are respectively configured as 1× 1× . Among them, the 8 radiating patches or sub-radiating patches are evenly distributed on one side of the first curved dielectric layer 1a.

[0147] Based on the 2× 2× (second sub-length, second sub-width and second thickness) corresponding to the second dielectric layer and the 2× 2 and the number of radiation patches or sub-radiation patches corresponding to the number of the second length, the second width and the second thickness of the second curved dielectric layer 1b are determined. For example, the number of radiation patches or sub-radiation patches corresponding to the number of the second length, the second width and the second thickness of the second curved dielectric layer 1b is 8, and every 2 radiation patches or sub-radiation patches form a group of second radiation patches, and there are 4 groups of second radiation patches, so that the second length, the second width and the second thickness of the second curved dielectric layer 1b are respectively configured as 1x 1x . Wherein, the 8 radiation patches or sub-radiation patches are uniformly distributed on one side of the second curved dielectric layer 1b.

[0148] In the feed method of the microstrip antenna, coaxial feed or microstrip line feed is generally used, the structure of the coaxial feed is relatively complex, is not convenient for being closely integrated with other electronic elements or systems, and increases the complexity and cost of overall design. In particular in this subject itself, in order to obtain very high gain and improve the directivity of the antenna, the number of array elements is very large, and the mutual coupling between the array elements becomes more complex. In the application of the antenna array, the processing workload is large, and the production cycle and cost are increased. Therefore, the microstrip line feed method is adopted here, which can maintain low transmission loss and noise interference, and ensure high-quality transmission of signals.

[0149] Figure 5 is a structure diagram of a microwave antenna corresponding to an embodiment of the utility model. As shown in Figure 5 , the microstrip patch antenna (microwave antenna) is composed of a ground layer (a first ground layer and a second ground layer), a dielectric layer (a first curved dielectric layer 1a and a second curved dielectric layer 1b) and a patch layer (a plurality of groups of first radiation patches and a plurality of groups of second radiation patches respectively arranged on the first curved dielectric layer 1a and the second curved dielectric layer 1b). Wherein, the material of the first ground layer and the second ground layer adopts brass, and the size is 1x 1x , the dielectric layer (the first curved dielectric layer 1a and the second curved dielectric layer 1b) adopts bendable F4B material, the relative dielectric constant is 2.2, and the thickness is , a rectangular radiation patch (each radiation patch or sub-radiation patch of the plurality of groups of first radiation patches and the plurality of groups of second radiation patches) and a microstrip strip (the first feeding mechanism and / or the second feeding mechanism; wherein the first feeding mechanism and / or the second feeding mechanism respectively includes: a feeding line and first feeding points and second feeding points at both ends of the feeding line) are printed on the dielectric layer, 、 、 represent length, width and height, and the specific parameter values of the first curved dielectric layer 1a or the second curved dielectric layer 1b of the microwave antenna and each radiation patch or sub-radiation patch are shown in the following table.

[0150] Parameter table of each radiation patch or sub-radiation patch corresponding structure of microwave antenna

[0151]

[0152] Based on the above, the parameters of each radiation patch or sub-radiation patch corresponding structure of the microwave antenna, the performance of the designed microwave antenna is evaluated. The microwave antenna is a converter which can convert the guided wave on the transmission line and the electromagnetic wave in the free space. Different structures can realize different performance parameters, and the main performance parameters are the standing wave ratio, the gain, the S parameter and the Smith chart.

[0153] The standing wave ratio is full name for voltage standing wave ratio, also known as VSWR. Or , refers to the ratio of the amplitude of the transmission line crest voltage and the trough voltage, that is:

[0154] (3-5)

[0155] (3-6)

[0156] In the formula, is the reflection coefficient, and are the output impedance and the input impedance respectively.

[0157] When the values of the two impedances are the same, that is, the complete matching is achieved, the reflection coefficient is equal to 0, and the standing wave ratio is 1. When the antenna standing wave ratio is closer to 1, it indicates that the antenna system is matched with the transmission line or the load impedance, and the signal can be transmitted to the target device to the maximum extent, and the best transmission quality is achieved. When is larger, it indicates that the reflection is larger, and the impedance matching is worse. The reasonable range of the antenna standing wave ratio is usually between 1 and 1.5.

[0158] Figure 6 The standing wave ratio corresponding to each sub-radiation patch in the microwave antenna of the embodiment of the utility model. As Figure 6 shown, the standing wave ratio of a single antenna unit (only one radiation patch or one sub-radiation patch is arranged) is stabilized at 1.2-1.5 under the working frequency of 2.050GHz to 2.063GHz, which basically meets the requirement of the antenna standing wave ratio.

[0159] The gain of the antenna refers to the ratio of the power density of the signal generated by the actual microwave antenna and the ideal radiation unit at the same point in space under the condition of the same input power, and the most commonly used antenna gain unit is dBi. The radiation pattern of the microwave antenna includes the main lobe, the side lobe and the back lobe. Among them, the narrower the main lobe, the smaller the side lobe, and the higher the gain.

[0160] The higher the antenna gain, the greater the radiated power of the antenna in its main radiation direction, which means that the signal coverage of the antenna will also be wider. Figure 7 is the gain corresponding to the 2D and 3D directional diagram of each sub-radiation patch in the microwave antenna of the embodiment of the utility model. As shown in Figure 7 , the maximum gain of the microwave corresponding to the microwave antenna with only one radiation patch or one sub-radiation patch is 16.8dBi, the energy is concentrated in the main lobe, the 3db beam width of the main lobe reaches 94.6°, and it has strong directivity, and its microwave field can cover a long distance.

[0161] Figure 8 is the port schematic diagram corresponding to the vector network analyzer for measuring the S parameter of each sub-radiation patch in the microwave antenna. The S parameter is also called scattering parameter, which mainly describes the electromagnetic characteristics of the antenna in the signal transmission and reception process. The vector network analyzer can collect the change of the signal, as shown in Figure 8 , a classical two-port network. Among them, is the input reflection coefficient, which represents the proportion of the signal reflected back from the input end of the antenna, and reflects the matching performance of the microwave antenna. is the forward transmission coefficient, which represents the signal loss from one port input to the microwave antenna to the output of another port; represents the influence of the output end on the input end; is the output reflection coefficient, also known as output return loss. In the intracranial hemorrhage model, has the best sensitivity, so the is extracted as the evaluation parameter.

[0162] In the embodiments of the present disclosure and other possible embodiments, each sub-radiation patch (microwave antenna with only one radiation patch or one sub-radiation patch) in the microwave antenna in the first set working frequency band (for example, 2.04-2.06GHz frequency band), the working bandwidth of the microwave antenna with only one radiation patch or one sub-radiation patch is-10dBi; the gain of the microwave antenna with only one radiation patch or one sub-radiation patch is 16.8dB in the main radiation direction; the standing wave ratio of the microwave antenna with only one radiation patch or one sub-radiation patch is not more than 1.5 in the working frequency band.

[0163] Figure 9 is the S parameter corresponding to each sub-radiation patch in the microwave antenna of the embodiment of the utility model. As can be seen from Figure 9 , the microwave antenna corresponding to the microwave antenna with only one radiation patch or one sub-radiation patch, the The working frequency is between 2.04-2.06 GHz, and the maximum gain is 16.8 dB, indicating that the antenna unit has good radiation performance.

[0164] As Figure 1 shown, the conformal array antenna (i.e., microwave antenna) designed by the present disclosure is composed of 16 antenna unit corresponding radiation patches or sub-radiation patches, which are distributed in a symmetrical ring around the head curve. The antenna is divided into left and right two part sub-arrays, corresponding to the first curved dielectric layer 1a and the second curved dielectric layer 1b respectively; wherein the first curved dielectric layer 1a and the second curved dielectric layer 1b are also respectively provided with a plurality of groups of first radiation patches connected with the first excitation port 36 and a plurality of groups of second radiation patches connected with the second excitation port 55.

[0165] As Figure 1 shown, the plurality of groups of first radiation patches includes 8 uniformly arranged radiation patches or each sub-radiation patch. For example, the 8 uniformly arranged radiation patches or sub-radiation patches are respectively set as the first sub-radiation patch 21, the second sub-radiation patch 22, the third sub-radiation patch 23, the fourth sub-radiation patch 24, the fifth sub-radiation patch 25, the sixth sub-radiation patch 26, the seventh sub-radiation patch 27, and the eighth sub-radiation patch 28, forming a corresponding first sub-array, the first sub-array is configured as a 1x8 first surface array, and the 1x8 first surface array corresponding to the first sub-array is configured as a left or right half brain surface array.

[0166] As Figure 1 shown, similarly, the plurality of groups of second radiation patches includes 8 uniformly arranged radiation patches or sub-radiation patches. For example, the 8 uniformly arranged radiation patches or sub-radiation patches are respectively set as the ninth sub-radiation patch 29, the tenth sub-radiation patch 40, the eleventh sub-radiation patch 41, the twelfth sub-radiation patch 42, the thirteenth sub-radiation patch 43, the fourteenth sub-radiation patch 44, the fifteenth sub-radiation patch 45, and the sixteenth sub-radiation patch 46, forming a corresponding second sub-array, the second sub-array is configured as a 1x8 second surface array, and the 1x8 second surface array corresponding to the second sub-array is configured as a left or right half brain surface array.

[0167] Specifically, as Figure 1 shown, when the 1x8 first surface array corresponding to the first sub-array is configured as a left half brain surface array, the 1x8 second surface array corresponding to the second sub-array is configured as a right half brain surface array; or, when the 1x8 first surface array corresponding to the first sub-array is configured as a right half brain surface array, the 1x8 second surface array corresponding to the second sub-array is configured as a left half brain surface array.

[0168] In the embodiments and other possible embodiments of the present disclosure, the diameter of the whole conformal array antenna (i.e., the microwave antenna) is 573.04 mm, the height is 193.35 mm, and the thickness is 2.08 mm, which can realize full coverage of the head and has good inclusiveness. In terms of the feeding form, the microstrip line feeding mode adopted by the antenna can effectively suppress the influence of the intercoupling effect between patches and other electromagnetic interference factors while ensuring low-loss signal transmission, thereby ensuring that the whole array antenna can provide accurate, stable and repeatable measurement results during detection.

[0169] In the embodiments of the present disclosure, when the first set curvature and the second set curvature are set to 0, and the first curved dielectric layer 1a and the second curved dielectric layer 1b are in a straight plate state, the performance corresponding to the microwave antenna satisfies that the operating bandwidth is 0.02 GHz, the gain in the main radiation direction is 30.95G dB, and the VSWR is not more than 2 in the second set operating frequency band (for example, the 2.01-2.03 GHz frequency band).

[0170] Figure 10 is a schematic diagram of a structure parameter corresponding to the measurement microwave antenna according to the embodiments of the present disclosure. As shown in Figure 10 , as shown in Figure 10 (a) is a front view corresponding to the measurement microwave antenna; Figure 10 (b) is a top view corresponding to the measurement microwave antenna; Figure 10 (c) is a left (right) view corresponding to part of the structure of the measurement microwave antenna. In Figure 10 (a), since the sizes of the first curved dielectric layer 1a and the second curved dielectric layer 1b are the same, in the front view corresponding to the measurement microwave antenna, the first curved dielectric layer 1a forms an obstruction to the second curved dielectric layer 1b or the second curved dielectric layer 1b forms an obstruction to the first curved dielectric layer 1a.

[0171] In the embodiments and other possible embodiments of the present disclosure, the feeding mechanisms respectively connected with each radiation patch or sub-radiation patch of the plurality of groups of first radiation patches and the first excitation port 36, and the feeding mechanisms respectively connected with the plurality of groups of second radiation patches and the second excitation port 55 form a feeding network (a first feeding network and a second feeding network).

[0172] In addition, in the embodiments and other possible embodiments of the present disclosure, the number of the first power distributor or the second power distributor connected with the first excitation port 36 or the second excitation port 55 or the power corresponding distribution number is determined according to the multiple groups of the first radiation patch or the multiple groups of the second radiation patch, respectively. The first excitation port 36 is connected with each of the first radiation patch or each of the sub-radiation patch through the corresponding first power distributor and the first feed network; the second excitation port 55 is connected with each of the second radiation patch or each of the sub-radiation patch through the corresponding second power distributor and the second feed network; the number of the first power distributor or the power corresponding distribution number is the same as the group number corresponding to the multiple groups of the first radiation patch; similarly, the number of the second power distributor or the power corresponding distribution number is the same as the group number corresponding to the multiple groups of the second radiation patch.

[0173] Specifically, in the embodiment shown in Figure 10 , the first feed network and the second feed network respectively adopt 4-way power distributors to uniformly transmit the energy provided by the first excitation port 36 and the second excitation port 55 to 4 groups of the first radiation patch and 4 groups of the second radiation patch. The width of the transmission line (feed line) near the bottom of each radiation patch (each sub-radiation patch) is slightly wider than the width of the distal transmission line (feed line), which is used to adjust the matching degree between the upper 4 groups of the first radiation patch and / or the 4 groups of the second radiation patch and the corresponding feed line.

[0174] Parameter table of microwave antenna corresponding structure

[0175]

[0176] In the CST software, the excitation power is set to 1mW, and the simulation of the microwave antenna is carried out. Figure 11 The S parameter of the microwave antenna corresponding to the microwave antenna is measured in the embodiment of the present application. The S parameter (i.e. scattering parameter, which is used to describe the key index of the reflection and transmission characteristics at the antenna port) of the microwave antenna. As shown in Figure 11 When the microwave antenna works at the center frequency 1.967GHz, the gain of the microwave antenna is 24.52dBi at this time, which is significantly higher than that of a single antenna unit (each radiation patch or sub-radiation patch of the microwave antenna), which means that it has stronger penetration than a single antenna unit, and enhances the signal strength and coverage.

[0177] Figure 12 The standing wave ratio of the microwave antenna corresponding to the microwave antenna is measured in the embodiment of the present application. As shown in Figure 12As shown, the standing wave ratio (VSWR) of the microwave antenna is in the range of 1.13 to 1.34, which low standing wave ratio characteristic indicates that good impedance matching is achieved between the antenna and the feeder line, reduces energy reflection, thereby improving energy transmission efficiency and reducing system loss. This characteristic is one of the important indicators for evaluating the radiation performance of the antenna, and is directly related to the overall performance of the microwave antenna.

[0178] In the embodiment of the present disclosure, the set distance between the opposite ends of the first curved surface dielectric layer 1a with the first set curved surface radian and the second curved surface dielectric layer 1b with the second set curved surface radian satisfies that the beam width corresponding to the set decibel on the main lobe of the directional diagram at the working frequency reaches the set angle; wherein, the set decibel on the main lobe of the directional diagram corresponding to the microwave antenna at the working frequency is configured as 3 decibels; wherein, the beam width corresponding to the set decibel on the main lobe of the directional diagram corresponding to the microwave antenna at the working frequency reaches the set angle of 120 degrees; wherein, the set distance between the opposite ends of the first curved surface dielectric layer 1a with the first set radian and the second curved surface dielectric layer 1b with the second set radian is configured as 177.50 millimeters.

[0179] Figure 13 The 2D and 3D direction corresponding gain of the microwave antenna of the embodiment of the present utility model. As shown in the figure, Figure 12 The curved surface arc degree of the first curved surface dielectric layer 1a and the second curved surface dielectric layer 1b, and the distance L5 between the two ends of the first curved surface dielectric layer 1a and the second curved surface dielectric layer 1b affect the beam width to reach the set angle of 120°. At the working frequency of 1.967GHz, the main lobe 3db beam width of the antenna reaches 120° (the arc degree of the antenna, L5 affects the beam width to reach 120°), which wide beam width ensures that the antenna can fully cover the target area in the detection application, and the circularity of the directional diagram of the microwave antenna is good. In the application scenario of head detection, the antenna can completely cover the left brain area and the right brain area.

[0180] In the embodiment of the present disclosure, a cerebral hemorrhage detection system is also provided, which comprises or applies the microwave antenna described above. Wherein, the inside of the first curved surface dielectric layer 1a and the second curved surface dielectric layer 1b forms a brain containing space; wherein, the microwave antenna is used for receiving the input reflection coefficient corresponding to the brain in the brain containing space; wherein, the input reflection coefficient is related to the electromagnetic parameters corresponding to the cerebral hemorrhage or the cerebral hematoma or the brain tissue.

[0181] In the embodiment of the present disclosure, the brain hemorrhage detection system further comprises a processor, wherein the processor is configured to control the excitation source to send microwave signals to the brain containing space through the corresponding microwave antenna of the first curved medium layer 1a and the second curved medium layer 1b, and control the microwave antenna to receive the input reflection coefficient signal.

[0182] In the embodiment and other possible embodiments of the present disclosure, the head model is derived from the CQ500 public data set of New Delhi, USA. In the analysis of the head structure, the main body is subdivided into four key components, i.e., skull, brain parenchyma, cerebrospinal fluid and hematoma, to accurately simulate the complex anatomical structure of the head. In this study, the 3DSlicer medical image processing and analysis software platform is used to identify and mark the boundaries of the skull, brain parenchyma, cerebrospinal fluid and hematoma layer by layer through manual segmentation technology, to ensure the accuracy and consistency of the segmentation, and the 3D reconstruction module is used to generate a biomimetic head model.

[0183] In the embodiment and other possible embodiments of the present disclosure, the segmented data is then exported to the CST simulation software for subsequent electromagnetic field simulation and analysis. In the CST software, according to the dielectric constant and conductivity data of each part of the brain tissue, as shown in the following table, the four materials of skull, brain parenchyma, cerebrospinal fluid and hematoma are newly created in the material selection interface, and the corresponding parameters of the four structures are set one by one, so as to simulate the head model of hematoma.

[0184] Electromagnetic parameters of main human brain tissues at 1.967 GHz

[0185]

[0186] The head biomimetic model (head model) is located in the center of the two conformal array antennas, and the excitation power of the vector network analyzer connected to the two conformal array antennas in the CST microwave studio (CSTMICROWAVE STUDIO) is set to 1mW. Figure 14 is the input reflection coefficient (Input Reflection Coefficient, ) curve corresponding to the scattering parameters of the antenna itself and the input reflection coefficient (Input Reflection Coefficient, ) curve corresponding to the scattering parameters of the added biomimetic head.

[0187] Figure 14 is the input reflection coefficient (Input Reflection Coefficient, ) curve corresponding to the scattering parameters of the microwave antenna of the embodiment of the utility model and the input reflection coefficient (Input Reflection Coefficient, Figure 14It can be seen that the antenna's operating frequency band below -10 dB is 1.94–1.96 GHz. After adding the human head model, the entire curve shifts to the left to 1.93–1.98 GHz, and the corresponding maximum gain changes from 24.52 dBi to 18.41 dBi. Within the head simulation calculation region, the maximum electric field strength is 32.65... The maximum permissible radiation energy density to the human body under the corresponding frequency according to the IEEE standard is 7.2. .

[0188] The energy density can be converted into electric field strength using equation (3-9), which is 110.9. 32.65 It is much smaller than that value. At a power of 1 mW, the electric field intensity radiated by the antenna to the human head is much lower than the maximum allowable value according to IEEE standards, indicating that the antenna used for detecting cerebral hemorrhage complies with electromagnetic radiation standards.

[0189] (3-9)

[0190] A sphere was inserted into the brain of a head model, and the sphere was given the dielectric constant and tangential loss of blood to create a simulation model of cerebral hemorrhage. In this experiment, blood cells with radii of 10, 20, and 40 mm were used to simulate hemorrhage volumes of 3.14, 12.56, and 50.24 mL, respectively, corresponding to mild, moderate, and severe hemorrhage levels.

[0191] Figure 15 This invention relates to three types of bleeding at 1.94–1.96 GHz. Curve. For example... Figure 15 As shown, Figure 15 (b) is Figure 15 (a) A magnified view of the area between 1.94 and 1.96 GHz. From Figure 15 It can be seen from the three types of bleeding volume There are significant differences; as the frequency increases, The phase value shows a trend of first decreasing and then increasing. SPSS 26 was used to analyze three different bleed values ​​in the antenna's operating frequency band of 1.94–1.96 GHz. The simulation results were subjected to Friedman's test on multiple relevant samples, and the test results are shown in the table. The test results show that under the antenna operating frequency band (1.94–1.96 GHz), three different degrees of cerebral hemorrhage... The difference was statistically significant (P<0.05), indicating that the antenna can detect cerebral hemorrhage of different degrees.

[0192] Three types of hemorrhage at 1.94–1.96 GHz Friedman test results for amplitude values ​​across multiple correlated samples

[0193]

[0194] Figure 16 is 1.94~1.96GHz under 2 different positions of the embodiment of the utility model Curve. As Figure 16 shown, 2 different positions are configured as left and right brain respectively. In the brain, the corpus callosum is the interval between the left and right brain, and in the left and right brain of the brain, a sphere with a radius of 10, 20 and 40 mm is set to simulate blood clots at different positions. From Figure 16 it can be seen that the values of the left and right brain are obviously different, when the blood clots are 10mm and 20mm, the resonance frequency of the left brain is slightly smaller than that of the right brain, and the resonance depth is slightly larger than that of the right brain. With the increase of the volume of the blood clots, the working frequency band of the antenna remains almost unchanged, and the resonance depth changes. In the working frequency range, the left and right brain with small blood clots have greater phase difference.

[0195] SPSS 26 is used to perform two independent sample tests on the simulation results of the 3 groups of different positions of the antenna working frequency band 1.94~1.96GHz The test results are shown in the table. The test results show that the difference of 3 different positions under the working frequency band of the antenna (1.94~1.96GHz) has statistical significance (P<0.05), which shows that the antenna can detect brain hemorrhage at different positions.

[0196] The amplitude value of 2 different positions of the blood clots under 1.94~1.96GHz Two independent sample test results

[0197]

[0198] In summary, the present disclosure designs a symmetrical dual-channel conformal array microwave antenna, which is optimized by CST microwave software for the structure and parameters of the antenna, and can be used for cerebral hemorrhage detection. Combined with the symmetry of the human brain, the structure of the microwave antenna closely surrounds the skull curve, and the microwave field direction can completely cover the left and right hemispheres. The microwave antenna selects a frequency of 1-3 GHz, and the microwaves in this frequency band have a certain penetration to biological tissues, which helps to improve the accuracy and sensitivity of detection, and the selection of microwave antenna materials considers the performance, plasticity and cost performance of the materials. In this study, F4B is selected as the substrate, and the characteristics of this material include low dielectric constant, low dielectric loss, low moisture absorption rate, isotropy, etc. In terms of feeding form, microstrip line feeding is adopted, which can effectively suppress interference while ensuring low-loss signal transmission. The results show that the conformal array microwave antenna has the characteristics of low operating frequency and high in-band gain. At the same time, the present disclosure uses 3DSlicer software to reconstruct the cerebral hemorrhage bionic model, ensuring the high accuracy and consistency of the reconstructed model in the anatomical structure, so that the finally generated cerebral hemorrhage bionic model can restore the complex physical structure and electromagnetic distribution characteristics of the human brain more realistically. In addition, the microwave detection technology used for cerebral hemorrhage detection is very safe, and the thermal effect and other potential biological effects on human tissues are relatively small, and under reasonable power control, the safety of experimental research can be ensured. As a natural and green prevention and control method, it reduces the medical intervention and the use of chemical drugs on patients, and meets the development requirements of green medicine. Moreover, the product of the project can be designed into wearable and soft bioelectronic products, like a skin patch, which can be used as an adhesive bandage, making it an instant diagnostic technology. Finally, the research on non-invasive methods for measuring intracranial pressure in clinical practice includes transcranial Doppler ultrasound (TCD), magnetic resonance imaging (MRI), computed tomography (CT), optic nerve sheath diameter (ONSD) measurement and tympanic membrane displacement. These methods eliminate the risk of infection and bleeding, but their accuracy is limited, they require expensive professional equipment, and they cannot be used in pre-hospital emergency and primary care, greatly increasing the patient's time to seek medical treatment and increasing the economic burden. Compared with traditional manual detection methods, patch antenna detection can reduce labor costs and improve detection efficiency, reduce production costs and be more accurate.

[0199] The above-described embodiments are only to express the implementation of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications, equivalent replacements, improvements, etc. can be made, which are all within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A microwave antenna, characterized by The application relates to a curved surface dielectric layer and a curved surface dielectric layer antenna. The first curved surface dielectric layer (1a) and the second curved surface dielectric layer (1b) are respectively provided with a first excitation port (36) and a second excitation port (55). The first curved surface dielectric layer (1a) and the second curved surface dielectric layer (1b) are respectively provided with a plurality of groups of first radiation patches connected with the first excitation port (36) and a plurality of groups of second radiation patches connected with the second excitation port (55).

2. The microwave antenna according to claim 1, characterized in that Each radiation patch or each sub-radiation patch in the plurality of groups of first radiation patches and / or the plurality of groups of second radiation patches is provided with an inward groove on one side of a feeding mechanism connected with the radiation patch or the sub-radiation patch.

3. The microwave antenna according to claim 2, characterized in that Each radiation patch or sub-radiation patch of the plurality of groups of first radiation patches is respectively provided with a corresponding first feeding mechanism slot on the corresponding first curved surface dielectric layer (1a); wherein the feeding mechanism respectively connected with each radiation patch or sub-radiation patch of the plurality of groups of first radiation patches and the first excitation port (36) is arranged in the first feeding mechanism slot; and / or, Each radiation patch or sub-radiation patch of the plurality of groups of second radiation patches is respectively provided with a corresponding second feeding mechanism slot on the corresponding second curved surface dielectric layer (1b); wherein the feeding mechanism respectively connected with each radiation patch or sub-radiation patch of the plurality of groups of second radiation patches and the second excitation port (55) is arranged in the second feeding mechanism slot.

4. The microwave antenna according to any of claims 2-3, characterized in that The corresponding first feeding mechanism of the plurality of groups of first radiation patches and / or the corresponding second feeding mechanism of the plurality of groups of second radiation patches comprises a feeding line and first and second feeding points at two ends of the feeding line; wherein the first feeding point is connected with the plurality of groups of first radiation patches or the plurality of groups of second radiation patches; the second feeding point is connected with the first excitation port (36) and / or the second excitation port (55); and / or, Each group of radiation patches in the plurality of groups of first radiation patches and / or the plurality of groups of second radiation patches is respectively provided with two sub-radiation patches; wherein the two sub-radiation patches are respectively provided with inward grooves on one side of a feeding mechanism connected with the sub-radiation patches.

5. The microwave antenna according to any of claims 1-3, characterized in that The set distance between opposite ends of the first curved surface dielectric layer (1a) with a first set curved surface radius and the second curved surface dielectric layer (1b) with a second set curved surface radius satisfies that the beam width corresponding to a set decibel on a main lobe of a directional diagram reaches a set angle under a working frequency; and / or, The first curved surface dielectric layer (1a) and the second curved surface dielectric layer (1b) have the same shape.

6. The microwave antenna according to claim 4, characterized in that The set distance between opposite ends of the first curved surface dielectric layer (1a) with a first set curved surface radius and the second curved surface dielectric layer (1b) with a second set curved surface radius satisfies that the beam width corresponding to a set decibel on a main lobe of a directional diagram reaches a set angle under a working frequency; and / or, The first curved dielectric layer (1a) and the second curved dielectric layer (1b) have the same shape.

7. The microwave antenna according to any of claims 1-3, 6, characterized by Further comprising: A first ground layer; the first ground layer is arranged on one side of the first curved dielectric layer (1a); The other side of the first curved dielectric layer (1a) is provided with the plurality of groups of first radiation patches; and / or, Further comprising: a second ground layer; the second ground layer is arranged on one side of the second curved dielectric layer (1b); the other side of the second curved dielectric layer (1b) is provided with the plurality of groups of second radiation patches.

8. The microwave antenna according to claim 4, characterized in that Further comprising: A first ground layer; the first ground layer is arranged on one side of the first curved dielectric layer (1a); The other side of the first curved dielectric layer (1a) is provided with the plurality of groups of first radiation patches; and / or, Further comprising: a second ground layer; the second ground layer is arranged on one side of the second curved dielectric layer (1b); the other side of the second curved dielectric layer (1b) is provided with the plurality of groups of second radiation patches.

9. The microwave antenna according to claim 5, characterized in that Further comprising: A first ground layer; the first ground layer is arranged on one side of the first curved dielectric layer (1a); The other side of the first curved dielectric layer (1a) is provided with the plurality of groups of first radiation patches; and / or, Further comprising: a second ground layer; the second ground layer is arranged on one side of the second curved dielectric layer (1b); the other side of the second curved dielectric layer (1b) is provided with the plurality of groups of second radiation patches.

10. A cerebral hemorrhage detection system characterized by, The microwave antenna comprises or applies any one of claims 1-9; the inside of the first curved dielectric layer (1a) and the second curved dielectric layer (1b) forms a brain containing space; wherein the microwave antenna is used to receive the input reflection coefficient signal corresponding to the brain in the brain containing space; the input reflection coefficient signal is related to the electromagnetic parameters corresponding to the brain hemorrhage or brain hematoma or brain tissue.

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