Capsule antenna and enteric capsule

Abstract

This application relates to a capsule antenna and an intestinal capsule. The capsule antenna includes a stimulation unit comprising multiple stacked stimulation circuit boards, with adjacent stimulation circuit boards interconnected; and a transmission unit comprising a transmission circuit board and a feed line. The transmission circuit board is connected to the stimulation circuit board located at the outermost end, and the transmission circuit board covers the edge of the stimulation circuit board along its circumference. The transmission circuit board has an outer surface facing away from the stimulation circuit board, and the feed line is disposed on the outer surface. By covering the edges of the multiple stacked stimulation circuit boards with the transmission circuit board, the radiation efficiency, communication distance, and stability reliability of the capsule antenna can be significantly improved, thereby enhancing the signal transmission performance of the capsule antenna. Simultaneously, the multiple stacked stimulation circuit boards are housed within the housing space enclosed by the transmission circuit board, allowing the stimulation circuit boards to fully utilize this housing space, thereby achieving a miniaturized design of the capsule antenna.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a capsule antenna and an intestinal capsule. Background Technology

[0002] Intestinal capsules can be swallowed. After ingestion, the capsule captures images of the digestive system at a certain photographic speed. These images are then wirelessly transmitted via an antenna inside the capsule to an external recorder, allowing doctors to diagnose digestive system diseases based on the images. Compared to examinations performed through a flexible endoscope, ingesting an intestinal capsule significantly improves patient comfort and reduces surgical risks. However, traditional intestinal capsules typically suffer from large antennas and poor signal transmission performance. Summary of the Invention

[0003] One technical problem addressed by this application is to achieve miniaturization of the capsule antenna while improving signal transmission performance.

[0004] A capsule antenna, comprising:

[0005] The stimulation unit includes multiple stacked stimulation circuit boards, with adjacent stimulation circuit boards interconnected; and

[0006] The transmission unit includes a transmission circuit board and a feed line. The transmission circuit board is connected to the stimulation circuit board located at the outermost end. The transmission circuit board covers the edge of the stimulation circuit board circumferentially. The transmission circuit board has an outer surface facing away from the stimulation circuit board, and the feed line is disposed on the outer surface.

[0007] In one embodiment, the stimulation circuit board and the transmission circuit board are both made of the same material and are integrally formed.

[0008] In one embodiment, both the stimulation circuit board and the transmission circuit board are made of polytetrafluoroethylene (PTFE).

[0009] In one embodiment, with reference to the capsule antenna in a flattened state, the stimulation circuit board is circular and the transmission circuit board is rectangular.

[0010] In one embodiment, the stimulation unit further includes a curved connecting circuit board connected between two spaced and adjacent stimulation circuit boards.

[0011] In one embodiment, the transmission unit further includes a magnetic shielding sheet, and the transmission circuit board has an inner surface facing the stimulation circuit board, the magnetic shielding sheet being disposed on the inner surface.

[0012] In one embodiment, with reference to the capsule antenna in a flattened state, the feed line includes a first connecting segment, an intermediate connecting segment, and a second connecting segment. The intermediate connecting segment is connected between the first connecting segment and the second connecting segment. The first connecting segment and the second connecting segment are perpendicular to each other. The length of the second connecting segment is greater than the length of the first connecting segment and the intermediate connecting segment. The first connecting segment is connected to the stimulation circuit board. The second connecting segment extends along the arrangement direction of the plurality of stimulation circuit boards and is spaced apart from the stimulation circuit boards.

[0013] In one embodiment, the second connecting segment is arc-shaped, the length of the first connecting segment is 1.5mm to 1.7mm, the length of the second connecting segment is 18mm to 19.5mm, and the length of the intermediate connecting segment is 4mm to 4.5mm.

[0014] In one embodiment, the capsule antenna has a thickness of 5.5 mm to 6.5 mm and a diameter of 9 mm to 10 mm.

[0015] An intestinal capsule includes a capsule body and a capsule antenna as described above, wherein the capsule antenna is sleeved in the capsule body.

[0016] One technical advantage of one embodiment of this application is that by covering the edges of multiple stacked stimulation circuit boards with a transmission circuit board, the radiation efficiency, communication distance, and stability reliability of the capsule antenna can be significantly improved, thereby enhancing the signal transmission performance of the capsule antenna. Simultaneously, the multiple stacked stimulation circuit boards are housed within the housing space enclosed by the transmission circuit board, allowing the stimulation circuit boards to fully utilize this housing space, thus achieving a miniaturized capsule antenna. This reduces the volume of the intestinal capsule, and a smaller intestinal capsule improves patient comfort during treatment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the flattened planar structure of a capsule antenna provided in one embodiment.

[0018] Figure 2 This is a schematic diagram of the planar structure of a capsule antenna after it has been wound into a product, as provided in one embodiment.

[0019] Figure 3 for Figure 3 The diagram shows a top view of the capsule antenna.

[0020] Figure 4 This is a schematic diagram of the planar structure of the capsule antenna provided in one embodiment after being flattened out from another view.

[0021] Figure 5 The simulated reflection coefficient S11 parameter diagram of the capsule antenna provided in one embodiment is shown.

[0022] Figure 6 A simulated 3D radiation pattern of a capsule antenna provided in one embodiment.

[0023] Reference numerals: capsule antenna 10, stimulation unit 100, stimulation circuit board 110, connecting circuit board 120, transmission unit 200, transmission circuit board 210, inner surface 211, outer surface 212, feed line 220, first connecting segment 221, second connecting segment 222, intermediate connecting segment 223. Detailed Implementation

[0024] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0025] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0026] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0027] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0028] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0029] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0030] See Figure 1 , Figure 2 , Figure 3 and Figure 4 One embodiment of this application provides an intestinal capsule comprising a capsule body and a capsule antenna 10, the capsule antenna 10 being housed within the capsule body. During use, the intestinal capsule can be swallowed. After ingestion, the capsule captures images of the digestive system at a certain photographic speed. These image signals are wirelessly transmitted via the capsule antenna 10 to an external recorder, allowing doctors to diagnose digestive system diseases based on the images. This improves patient comfort during medical visits.

[0031] See Figure 1 , Figure 2 , Figure 3 and Figure 4The capsule antenna 10 includes a stimulation unit 100 and a transmission unit 200. The stimulation unit 100 includes multiple stimulation circuit boards 110, which are stacked along their thickness direction. A certain spacing can be maintained between adjacent stacked stimulation circuit boards 110, and adjacent stimulation circuit boards 110 are interconnected. After the intestinal capsule enters the body, the stimulation circuit boards 110 can control the electrical stimulation of the intestine. The transmission unit 200 includes a transmission circuit board 210 and a feed line 220. The transmission circuit board 210 is connected to the stimulation circuit board 110 located at the outermost end. The feed line 220 is disposed on the transmission circuit board 210, which serves as the carrier for the feed line 220, which is used to transmit signals. Along the circumference of the stimulation circuit board 110, the transmission circuit board 210 covers the edge of the stimulation circuit board 110, thus making the formed transmission circuit board 210 approximately a cylindrical structure. The axial direction of the transmission circuit board 210 is approximately the thickness direction of the stimulation circuit board 110. Multiple stacked stimulation circuit boards 110 are housed in this cylindrical structure, making the capsule antenna 10 approximately cylindrical. This allows the cylindrical capsule antenna 10 to fit into the cylindrical capsule body, so that the capsule antenna 10 is housed on the capsule body, i.e., the capsule body is fitted over the capsule antenna 10. The transmission circuit board 210 has an outer surface 212 facing away from the outer surface 212 of the stimulation circuit board 110. The feed line 220 is disposed on this outer surface 212, which facilitates the transmission of signals such as images by the feed line 220.

[0032] Since the transmission circuit board 210 covers the edges of the multiple stacked stimulation circuit boards 110, the signal of the capsule antenna 10 can cover the 433MHz frequency band, thereby significantly improving the radiation efficiency, communication distance, and stability reliability of the capsule antenna 10, and thus enhancing the signal transmission performance of the capsule antenna 10. Simultaneously, the multiple stacked stimulation circuit boards 110 are housed within the housing space enclosed by the transmission circuit board 210, allowing the stimulation circuit boards 110 to fully utilize this housing space, thereby achieving a miniaturized configuration of the capsule antenna 10.

[0033] Traditional capsule antennas are relatively large, requiring a large capsule body to house them, resulting in a bulky intestinal capsule that negatively impacts patient comfort. Furthermore, the poor stability and reliability of capsule antennas make it difficult to maintain efficient wireless communication with the outside world amidst the random orientation and multipath loss environment within the intestines, thus affecting the accurate diagnosis of the patient's condition.

[0034] Regarding the capsule antenna 10 in the above embodiments, given its relatively small size, the capsule body used to house it is also small, ensuring a small overall intestinal capsule size. This smaller intestinal capsule improves patient comfort during treatment. Simultaneously, the stability and reliability of the capsule antenna 10 are significantly improved, enabling it to maintain efficient wireless communication with the outside world even under random orientation and multipath loss conditions within the intestines, thereby enhancing the accuracy of patient diagnosis.

[0035] See Figure 1 , Figure 2 , Figure 3 and Figure 4 In some embodiments, the stimulation circuit board 110 and the transmission circuit board 210 are made of the same material and are integrally formed. By using the same material and being integrally formed, the manufacturing process of the capsule antenna 10 can be reduced, thereby lowering the processing difficulty and ultimately improving production efficiency and reducing manufacturing costs. Furthermore, the capsule antenna 10 can integrate both electrical stimulation and signal transmission functions, significantly improving space utilization and reducing the overall volume of the capsule antenna 10 and the intestinal capsule, thus enhancing patient comfort during treatment.

[0036] In some embodiments, the stimulation circuit board 110 comprises polytetrafluoroethylene (PTFE) material, making it a Teflon circuit board. For example, the stimulation circuit board 110 can be a Rogers RT / duroid 6002 low-loss PTFE flexible circuit board. The dielectric loss tangent of this Rogers RT / duroid 6002 low-loss PTFE flexible circuit board is 0.0020°, which is one-tenth of the dielectric loss tangent of ordinary circuit boards. This effectively reduces dielectric loss by more than 90%, breaking through the efficiency bottleneck of traditional flexible circuit boards and meeting the low-loss requirements of implantable medical devices. The thickness of the flexible stimulation circuit board 110 can be approximately 0.2 mm, giving it excellent flexibility and radio frequency performance. Its dielectric constant can be 2.94, further reducing dielectric loss and meeting the low-loss requirements of implantable medical devices.

[0037] In some embodiments, the transmission circuit board 210 comprises polytetrafluoroethylene (PTFE) material, making it a Teflon circuit board. For example, the transmission circuit board 210 can be a Rogers RT / duroid 6002 low-loss PTFE flexible circuit board. The dielectric loss tangent of this Rogers RT / duroid 6002 low-loss PTFE flexible circuit board is 0.0020°, which is one-tenth of the dielectric loss tangent of a conventional circuit board. This effectively reduces dielectric loss by more than 90%, bringing conductor loss close to zero. The radiation efficiency of the transmission unit 200 is significantly improved, breaking through the efficiency bottleneck of traditional flexible circuit boards. This meets the low-loss requirements of implantable medical devices and ultimately reduces signal energy loss to improve the signal transmission performance of the capsule antenna 10. The thickness of the flexible transmission circuit board 210 can be approximately 0.2 mm, giving it excellent flexibility and radio frequency performance. Its dielectric constant can be 2.94, further reducing dielectric loss and meeting the low-loss requirements of implantable medical devices.

[0038] See Figure 1 , Figure 2 , Figure 3 and Figure 4 In some embodiments, with the capsule antenna 10 in a flattened state as a reference, the stimulation circuit board 110 is circular, and the transmission circuit board 210 is rectangular. Therefore, when the flattened capsule antenna 10 is wound to form a coiled finished capsule antenna 10, the transmission circuit board 210 can effectively cover the stimulation circuit board 110, thereby achieving a miniaturized configuration of the capsule antenna 10. The number of stimulation circuit boards 110 can be three, etc. In other embodiments, the shape of the stimulation circuit board 110 can also be elliptical or a regular polygonal structure, or other regular or irregular structures.

[0039] See Figure 1 , Figure 2 , Figure 3 and Figure 4 In some embodiments, the stimulation unit 100 further includes a connecting circuit board 120, which is bent and connected between two spaced and adjacent stimulation circuit boards 110, such that two adjacent stimulation circuit boards 110 are stacked on top of each other. The material of the connecting circuit board 120 can be the same as that of the stimulation circuit boards 110, allowing the connecting circuit board 120 and the stimulation circuit boards 110 to be integrally formed, thereby reducing the manufacturing cost of the stimulation unit 100. By providing the connecting circuit board 120, the connection strength between two adjacent stimulation circuit boards 110 can be improved, which is beneficial to the manufacturing and forming of the capsule antenna 10, and at the same time improves the stability and reliability of the capsule antenna 10 for signal transmission.

[0040] See Figure 1 , Figure 2 , Figure 3 and Figure 4 In some embodiments, the transmission unit 200 further includes a magnetic shielding sheet, which may be a nanocrystalline magnetic shielding sheet. The transmission circuit board 210 has an inner surface 211, and the inner surface 211 and the outer surface 212 are two surfaces disposed opposite to each other in the thickness direction of the transmission circuit board 210. Since the outer surface 212 is disposed away from the stimulation circuit board 110, the inner surface 211 will be disposed towards the stimulation circuit board 110. The magnetic shielding sheet is disposed on the inner surface 211 of the transmission circuit board 210. The magnetic shielding sheet can be disposed on the inner surface 211 of the transmission circuit board 210 by means of adhesive or printing, which can reasonably simplify the manufacturing process of the transmission unit 200 and thus reasonably reduce the manufacturing cost of the transmission unit 200.

[0041] See Figure 1 , Figure 2 , Figure 3 and Figure 4 By setting a magnetic shielding sheet on the inner surface 211 of the transmission circuit board 210, the magnetic shielding sheet can shield the signal to a certain extent. This reflects the radiation from the feed line 220 towards the human tissue to the outside, preventing signal absorption and damage by the human tissue, thereby improving external communication efficiency, the stability and reliability of signal transmission of the capsule antenna 10, and ultimately enhancing the signal transmission performance of the capsule antenna 10. On the other hand, the magnetic shielding sheet can isolate the transmission circuit board 210 from metal components such as batteries and chips inside the capsule body, suppressing electromagnetic interference and energy absorption loss from metal to the feed line 220, preventing severe interference from metal to the resonance of the feed line 220, and avoiding frequency drift and sudden efficiency reduction. Specifically, frequency drift can be controlled within 1MHz, and resonance stability can be improved by more than 5 times, thereby improving the radiation efficiency and transmission distance of the feed line 220, similarly improving external communication efficiency, enhancing the stability and reliability of signal transmission of the capsule antenna 10, and ultimately further improving the signal transmission performance of the capsule antenna 10.

[0042] See Figure 1 , Figure 2 , Figure 3 and Figure 4 In some embodiments, the feed line 220 can be made of rolled copper foil material. The thickness of the feed line 220 made of rolled copper foil material can be 35μm, so that the feed line 220 can cover a skin depth of 433MHz and the conductor loss is close to zero, thereby improving the radiation efficiency and transmission distance of the feed line 220 for the signal, as well as improving the external communication efficiency, and also improving the stability and reliability of the signal transmission of the capsule antenna 10, ultimately further improving the signal transmission performance of the capsule antenna 10.

[0043] See Figure 1 , Figure 2 , Figure 3 and Figure 4 In some embodiments, with the capsule antenna 10 in a flattened state as a reference, the feed line 220 includes three segments, which, for ease of description, are sequentially referred to as a first connecting segment 221, an intermediate connecting segment 223, and a second connecting segment 222. The intermediate connecting segment 223 connects between the first connecting segment 221 and the second connecting segment 222; that is, one end of the intermediate connecting segment 223 is connected to the first connecting segment 221, and the other end is connected to the second connecting segment 222. The length of the second connecting segment 222 is greater than the lengths of the first connecting segment 221 and the intermediate connecting segment 223, making the second connecting segment 222 the longest, the intermediate connecting segment 223 the second longest, and the first connecting segment 221 the shortest. The first connecting segment 221 is connected to the stimulation circuit board 110, and the second connecting segment 222 extends along the arrangement direction of the plurality of stimulation circuit boards 110, such that the second connecting segment 222 and the stimulation circuit boards 110 are spaced apart. The first connecting segment 221 and the second connecting segment 222 can be perpendicular to each other. Therefore, both the first connecting segment 221 and the second connecting segment 222 are straight segments extending along a straight line, while the intermediate connecting segment 223 can be an arc segment, making it a quarter-circle arc segment. This ensures that both ends of the intermediate connecting segment 223 are tangent to the first connecting segment 221 and the second connecting segment 222, guaranteeing a smooth transition throughout the feed line 220. By configuring the feed line 220 as described above, the radiation efficiency and transmission distance of the feed line 220 can be improved, thereby increasing the efficiency of external communication, enhancing the stability and reliability of signal transmission in the capsule antenna 10, and ultimately further improving the signal transmission performance of the capsule antenna 10.

[0044] See Figure 1 , Figure 2 , Figure 3 and Figure 4In some embodiments, the length of the first connecting segment 221 is 1.5mm to 1.7mm, the length of the second connecting segment 222 is 18mm to 19.5mm, and the length of the intermediate connecting segment 223 is 4mm to 4.5mm. For example, the length of the first connecting segment 221 can be 1.5mm, 1.67mm, or 1.7mm, etc., the length of the second connecting segment 222 can be 18mm, 19.25mm, or 19.5mm, etc., and the length of the intermediate connecting segment 223 can be 4mm, 4.268mm, or 4.5mm, etc. For example, when the length of the first connecting segment 221 is 1.67mm, the length of the second connecting segment 222 is 19.25mm, and the length of the intermediate connecting segment 223 is 4.268mm, the total length of the entire feeder 220 is approximately 25.2mm. By designing the lengths of the first connecting segment 221, the second connecting segment 222, and the intermediate connecting segment 223 of the feed line 220, the feed line 220 can be precisely matched to the shape of the capsule antenna 10 with its cylindrical structure.

[0045] In some embodiments, the thickness of the capsule antenna 10 is 5.5 mm to 6.5 mm, such as 5.5 mm, 6 mm, or 6.5 mm. The diameter of the capsule antenna 10 is 9 mm to 10 mm, such as 9 mm, 9.6 mm, or 10 mm. For example, the thickness of the capsule antenna 10 can be 6 mm and the diameter can be 9.6 mm, which ensures that the capsule antenna 10 improves signal transmission performance while maintaining a miniaturized design.

[0046] See Figure 5 Electromagnetic simulation verification of the aforementioned capsule antenna 10 using human tissue showed that its operating bandwidth S11 reached -23.9 dB in the 433 MHz band, and S11 < -10 dB within the 431.5 MHz to 434.9 MHz band. (See reference...) Figure 6 The capsule antenna 10 exhibits good radiation performance in three-dimensional space.

[0047] In summary, by covering the edges of multiple stacked stimulation circuit boards 110 with the transmission circuit board 210, the capsule antenna 10 can cover the 433MHz frequency band, thereby significantly improving the radiation efficiency, communication distance, and stability of the capsule antenna 10, and thus enhancing its signal transmission performance. Simultaneously, the multiple stacked stimulation circuit boards 110 are housed within the space enclosed by the transmission circuit board 210, allowing the stimulation circuit boards 110 to fully utilize this space, thus enabling miniaturization of the capsule antenna 10. This reduces the volume of the intestinal capsule, improving patient comfort during treatment. By incorporating a magnetic shielding sheet and rationally configuring the shape and length of the feeder 220, the effects of dielectric loss, metallic interference, and human energy absorption can be reduced, thereby improving radiation efficiency and frequency stability, ultimately enhancing the signal transmission performance of the capsule antenna 10.

[0048] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0049] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A capsule antenna, characterized by, include: The stimulation unit includes multiple stimulation circuit boards stacked on top of each other, with adjacent stimulation circuit boards interconnected. and The transmission unit includes a transmission circuit board and a feed line. The transmission circuit board is connected to the stimulation circuit board located at the outermost end. The transmission circuit board covers the edge of the stimulation circuit board circumferentially. The transmission circuit board has an outer surface facing away from the stimulation circuit board, and the feed line is disposed on the outer surface.

2. The capsule antenna according to claim 1, characterized in that, The stimulation circuit board and the transmission circuit board are both made of the same material and are integrally molded.

3. The capsule antenna according to claim 2, characterized in that, Both the stimulation circuit board and the transmission circuit board are made of polytetrafluoroethylene (PTFE).

4. The capsule antenna of claim 1, wherein, With the capsule antenna in a flattened state as a reference, the stimulation circuit board is circular and the transmission circuit board is rectangular.

5. The capsule antenna of claim 1, wherein, The stimulation unit also includes a curved connecting circuit board, which is connected between two spaced and adjacent stimulation circuit boards.

6. The capsule antenna of claim 1, wherein, The transmission unit further includes a magnetic shielding sheet, and the transmission circuit board has an inner surface facing the stimulation circuit board, with the magnetic shielding sheet disposed on the inner surface.

7. The capsule antenna of claim 1, wherein, With the capsule antenna in a flattened state as a reference, the feed line includes a first connecting segment, an intermediate connecting segment, and a second connecting segment. The intermediate connecting segment connects the first connecting segment and the second connecting segment. The first connecting segment and the second connecting segment are perpendicular to each other. The length of the second connecting segment is greater than the length of the first connecting segment and the intermediate connecting segment. The first connecting segment is connected to the stimulation circuit board. The second connecting segment extends along the arrangement direction of the plurality of stimulation circuit boards and is spaced apart from the stimulation circuit boards.

8. The capsule antenna according to claim 7, characterized in that, The second connecting segment is arc-shaped, the length of the first connecting segment is 1.5mm to 1.7mm, the length of the second connecting segment is 18mm to 19.5mm, and the length of the intermediate connecting segment is 4mm to 4.5mm.

9. The capsule antenna of claim 1, wherein, The capsule antenna has a thickness of 5.5 mm to 6.5 mm and a diameter of 9 mm to 10 mm.

10. An enteric capsule, characterized in that, It includes a capsule body and a capsule antenna as described in any one of claims 1 to 9, wherein the capsule antenna is sleeved in the capsule body.

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