CN116979252A - Small circularly polarized implantable antenna for capsule endoscope - Google Patents
Small circularly polarized implantable antenna for capsule endoscope Download PDFInfo
- Publication number
- CN116979252A CN116979252A CN202310910028.8A CN202310910028A CN116979252A CN 116979252 A CN116979252 A CN 116979252A CN 202310910028 A CN202310910028 A CN 202310910028A CN 116979252 A CN116979252 A CN 116979252A
- Authority
- CN
- China
- Prior art keywords
- ground plane
- coaxial feed
- center line
- short
- circuit probe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002775 capsule Substances 0.000 title claims abstract description 37
- 239000000523 sample Substances 0.000 claims abstract description 49
- 230000005855 radiation Effects 0.000 claims abstract description 38
- 239000000758 substrate Substances 0.000 claims abstract description 31
- 238000003466 welding Methods 0.000 claims description 28
- 230000010287 polarization Effects 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 9
- 239000004642 Polyimide Substances 0.000 claims description 8
- 229920001721 polyimide Polymers 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 6
- 238000009434 installation Methods 0.000 abstract description 3
- 238000004804 winding Methods 0.000 description 23
- 210000001519 tissue Anatomy 0.000 description 14
- 210000003205 muscle Anatomy 0.000 description 9
- 210000000813 small intestine Anatomy 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000006187 pill Substances 0.000 description 1
- 210000004761 scalp Anatomy 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/50—Feeding or matching arrangements for broad-band or multi-band operation
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention provides a small circularly polarized implantable antenna facing a capsule endoscope, which comprises: the device comprises a dielectric substrate and a covering layer, wherein the covering layer is positioned at the top of the dielectric substrate; the radiation surface is printed on the top of the medium substrate, the ground plane is printed on the bottom of the medium substrate, the radiation surface is communicated with the ground plane through the short-circuit probe and the coaxial feed center line, the short-circuit probe and the coaxial feed center line are symmetrically distributed with respect to the center of the medium substrate, and the cover layer is positioned on the top of the radiation surface. The small circularly polarized implantable antenna for the capsule endoscope has the advantages of simple structure, convenient installation, small size, low section and large channel capacity.
Description
Technical Field
The invention relates to the field of antennas, in particular to a small circularly polarized implantable antenna for a capsule endoscope.
Background
With the improvement of human living standard and the relatively stable international situation, the population aging problem of various countries in the world is becoming serious, and the demand of people for medical care service is also necessarily increased. Nowadays, china becomes the second major economy of the world, the life quality of people is obviously improved, and people put higher demands on the medical care service industry of China. The wireless biomedical equipment is utilized to improve the service level of the medical care industry, and is a main trend of the current and future development of the medical care service industry. At present, the wireless medical technology has a plurality of design problems to be solved and has wide application prospect, so that the wireless medical technology is focused by more and more domestic and foreign students. Ambulatory medical devices utilize wireless communication technology to improve medical service levels including telemedicine, appointment platforms, hospital information mobilization solutions, and the like. At present, research on implantable antennas by research teams at home and abroad has initially formed a theoretical system. The industrial, scientific and medical frequency bands (ISM for short, the main communication frequency bands comprise 433.1-434.8MHz,902-928MHz,2.4-2.48GHz and 5.725-5.875 GHz) have the advantages of available frequency bandwidth, large channel capacity and the like, so that the terminal antenna of the implantable medical device is more common to cover the ISM frequency band. The implanted antenna can be implanted into the scalp, heart and other tissues of a person by utilizing operation, and can be bent and put into the capsule equipment to enter the interior of the human body by being swallowed by a patient. For miniaturized implantable antennas, various nationists have proposed different schemes such as inverted F antennas (PIFAs), slot antennas, fractal structure antennas, etc. The design of DesignandinVitronTestonafacifferentialyFedDual-BandImplantable AntennaOperatingatMICSandISMBands designs a capacitively loaded circularly polarized antenna operating at 2.4GHz with dimensions of 10mm by 1.27mm, which has a relatively high profile and limited channel capacity; a capacitively loaded circular polarized antenna operating at 2.4GHz with dimensions of 10mm by 1.27mm is proposed in Designatory VitogestrafailyFedDual-BandImplantable AntennaOperatingatMICSandISMBands, which has a relatively high profile and limited channel capacity; a compact dual-frequency implantable antenna with the size of 10mm multiplied by 1.27mm for biomedical treatment is proposed in coplanar waveguide feed dual-frequency implantable antenna for biomedical treatment, but the size and the section of the antenna are larger. The three antennas have the same size, have different radiation characteristics due to different radiation surface structures, and all have the problems of large plane size and high section. Therefore, the design of the small circularly polarized implantable antenna for the capsule endoscope has the advantages of simple structure, small size, low section and large channel capacity, and has great significance.
Disclosure of Invention
The invention aims to provide a small circularly polarized implantable antenna for a capsule endoscope, which has the advantages of simple structure, convenient installation, small size, low section and large channel capacity.
In order to achieve the above object, the present invention provides the following solutions:
a small circularly polarized implantable antenna for a capsule endoscope, comprising: the capsule comprises a capsule shell, a medium substrate and a covering layer, wherein the medium substrate and the covering layer are arranged in the capsule shell, and the covering layer is positioned at the top of the medium substrate;
the top of the medium substrate is printed with a radiation surface, the bottom of the medium substrate is printed with a ground plane, the radiation surface is communicated with the ground plane through a short circuit probe and a coaxial feed center line, the short circuit probe and the coaxial feed center line are symmetrically distributed about the center of the medium substrate, and the cover layer is positioned at the top of the radiation surface;
the radiating surface is provided with a radiating surface short-circuit probe welding spot and a radiating surface coaxial feed center line welding spot corresponding to the short-circuit probe and the coaxial feed center line, the radiating surface short-circuit probe welding spot and the radiating surface coaxial feed center line welding spot are symmetrically distributed relative to the radiating surface top center, the radiating surface short-circuit probe welding spot is connected with the short-circuit probe, and the radiating surface coaxial feed center line welding spot is connected with the coaxial feed center line;
the ground plane center is provided with a ground plane cross groove, a ground plane short circuit probe welding spot and a ground plane coaxial feed grounding port are arranged on the ground plane corresponding to the short circuit probe and the coaxial feed center line, the ground plane short circuit probe welding spot and the ground plane coaxial feed grounding port are symmetrically distributed with respect to the ground plane bottom center, the ground plane short circuit probe welding spot is connected with the short circuit probe, and the ground plane coaxial feed grounding port is connected with the coaxial feed center line.
Optionally, the first winding structure is an S-shaped winding structure and is formed by connecting a plurality of long rectangles with the same length and width and a plurality of short rectangles with the same length and width, and the second winding structure is formed by connecting an M-shaped winding structure and an N-shaped winding structure, wherein the M-shaped winding structure and the N-shaped winding structure are formed by connecting a plurality of long rectangles with the same length and width and a plurality of short rectangles with the same length and width, and the long rectangles with the same length and width of the first winding structure and the long rectangles with the same length and width of the second winding structure are connected.
Optionally, the ground plane cross-shaped groove is formed by two rectangles which are perpendicular to each other and have the same size, and the aspect ratio of the two rectangles is 35:3.
Optionally, the dielectric substrate and the cover layer are made of rogers RO3010, and have a relative dielectric constant of 10.2.
Optionally, the radiating surface and the ground plane are both circular metal patches, and the short-circuit probe and the coaxial feed center line are both metal cylinders.
Optionally, the capsule shell is made of polyimide material, and the relative dielectric constant epsilon r=3.5.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects: the small circularly polarized implantable antenna for the capsule endoscope provided by the invention adopts a coaxial feed structure, is convenient to install, and further reduces the volume of the antenna by utilizing a short-circuit probe; a novel structure which is approximately symmetrical is designed by a slot loading technology on a square groove which is approximately evenly symmetrical on a radiation surface and adding a winding structure on the radiation surface, so that the antenna has circular polarization characteristics, the actual impedance bandwidth of the antenna is 2.38-2.53GHz, the relative bandwidth reaches 5.8%, compared with the working bandwidth of the antenna, 2.4-2.48GHz, the circular polarization broadband is realized, the center frequency stably works in the bandwidth, the influence of the complex tissue environment of a human body on the performance of the antenna is reduced, the return loss of the antenna at the center frequency respectively reaches-26.6 dB, and meanwhile, the voltage standing wave ratio of the antenna in the whole working bandwidth is smaller than 2. The 3dB axial ratio bandwidth is respectively 2.37-2.67GHz; the effective axial ratio bandwidth is 2.38-2.53GHz, and the relative effective axial ratio bandwidth is 5.8%, so that the circular polarization characteristic is good; the dielectric substrate and the cover layer are made of polyimide flexible materials with dielectric constants of 10.2, and the center frequency of the antenna is tuned by adjusting the size of the winding structure of the radiation surface and the size of the cross-shaped slot of the ground plane, so that broadband characteristics are obtained; the circular polarization characteristic of the antenna is realized by adjusting the positions of the feed point and the short-circuit probe, and the capsule shell is made of polyimide material, so that equipment required by other endoscope systems such as the antenna and the like is prevented from being directly contacted with a human body. .
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic cross-sectional view of an embodiment of the present invention;
FIG. 2 is a schematic diagram of a radiation surface structure according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a ground plane structure according to an embodiment of the present invention;
FIG. 4 is a graph of return loss of an antenna in a multilayer tissue of the small intestine, skin, fat and muscle at a frequency of 2.4GHz in an embodiment of the invention;
FIG. 5 is a graph of the 3dB axial ratio of an antenna in a frequency 2.4GHz multilayer tissue of the small intestine, skin, fat and muscle in an embodiment of the invention;
FIG. 6 is a graph showing the amplitude distribution of radiation surface current in small intestine, skin, fat and muscle multi-layer tissue at a frequency of 2.4GHz for an antenna in accordance with an embodiment of the present invention;
FIG. 7 is a graph showing the magnitude of the ground plane current in the small intestine, skin, fat and muscle multi-layer tissue at a frequency of 2.4GHz for an antenna in accordance with an embodiment of the present invention;
fig. 8 is a radiation pattern of an antenna in a multilayer tissue of the small intestine, skin, fat and muscle at a frequency of 2.4GHz in an embodiment of the invention.
Fig. 9 is a capsule antenna housing in an embodiment of the present invention.
Reference numerals: 1. a dielectric substrate; 2. a cover layer; 3. a radiation surface; 4. square holes; 5. a first serpentine structure; 6. a second serpentine structure; 7. the radiation surface short-circuits the probe welding spots; 8. the radiating surface is coaxial with the feed center line welding spot; 9. ground plane short circuit probe welding spots; 10. ground plane coaxial feed ground port; 11. a ground plane cross-shaped groove; 12. a ground plane; 13. a shorting probe; 14. a coaxial feed center line; 15. a capsule shell.
Detailed Description
The invention aims to provide a small circularly polarized implantable antenna for a capsule endoscope, which has the advantages of simple structure, convenient installation, small size, low section and large channel capacity.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
As shown in fig. 1, the small circularly polarized implantable antenna for a capsule endoscope provided by the present invention includes: the capsule comprises a capsule shell 15, a medium substrate 1 and a cover layer 2, wherein the medium substrate 1 and the cover layer 2 are arranged in the capsule shell 15, and the cover layer 2 is positioned at the top of the medium substrate 1;
the top of the dielectric substrate 1 is printed with a radiation surface 3, the bottom of the dielectric substrate 1 is printed with a ground plane 12, the radiation surface 3 is communicated with the ground plane 12 through a short circuit probe 13 and a coaxial feed center line 14, the short circuit probe 13 and the coaxial feed center line 14 are symmetrically distributed relative to the center of the dielectric substrate 1, and the cover layer 2 is positioned at the top of the radiation surface 3;
as shown in fig. 2, the radiating surface 3 is cut with a square hole 4 with a triangle cut at the center of the top and the triangle cut at the upper left corner and the lower right corner by taking the center of the top as the center, a S-shaped first meandering structure 5 is arranged at the left side of the square hole 4, a second meandering structure 6 formed by an M-shaped connection N-shape is arranged at the right side of the square hole 4, the first meandering structure 5 and the second meandering structure 6 are formed by connecting a plurality of long rectangles with the same length and width and a plurality of short rectangles with the same length and width, the first meandering structure 5 is not communicated with the second meandering structure 6, a radiating surface short-circuit probe welding spot 7 and a radiating surface coaxial feed center line welding spot 8 are arranged on the radiating surface 3 corresponding to the short-circuit probe 13 and the coaxial feed center line 14, the radiating surface short-circuit probe welding spot 7 and the radiating surface coaxial feed center line 8 are symmetrically distributed about the top center of the radiating surface 3, the radiating surface short-circuit probe welding spot 7 is connected with the coaxial feed center line 8, and the radiating surface coaxial feed center line 14 is connected with the coaxial feed center line 14;
as shown in fig. 3, the center of the ground plane 12 is provided with a ground plane cross-shaped groove 11, the ground plane cross-shaped groove 11 is formed by two rectangles which are perpendicular to each other and have the same size, the aspect ratio of the two rectangles is 35:3, the ground plane 12 is provided with a ground plane shorting probe welding spot 9 and a ground plane coaxial feed grounding port 10 corresponding to the shorting probe 13 and the coaxial feed center line 14, the ground plane shorting probe welding spot 9 and the ground plane coaxial feed grounding port 10 are symmetrically distributed about the bottom center of the ground plane 12, the ground plane shorting probe welding spot 9 is connected with the shorting probe 13, and the ground plane coaxial feed grounding port 10 is connected with the coaxial feed center line 14.
The dielectric substrate 1 and the cover layer 2 are made of rogers RO3010, and have a relative dielectric constant of 10.2.
The radiating surface 3 and the ground plane 12 are both circular metal patches, and the shorting probe 13 and the coaxial feed center line 14 are both metal cylinders.
The capsule housing 15 is made of polyimide material, and has a relative dielectric constant epsilonr=3.5.
One embodiment of the invention is:
the dielectric substrate 1 and the cover layer 2 are cylindrical, the material used is RojiesRO 3010, the relative dielectric constant is 10.2, and the planar dimensions of the dielectric substrate 1 and the cover layer 2 are pi×42mm 2 The section thickness was 0.625mm and 0.254mm, respectively.
As shown in fig. 2, a square 4 with a chamfer is cut along the center of the radiation surface 3, the square groove 4 has dimensions of 3.0mm×3.0mm, and the triangle chamfer side lengths are right triangles of 0.3mm, 0.4mm and 0.5mm respectively; an uncut S-shaped first winding structure 5 is arranged on the left side of the square hole, a second winding structure 6 formed by uncut M-shaped connection N shapes is arranged on the left side of the square hole, the first winding structure 5 and the second winding structure 6 are formed by connecting a plurality of long rectangles with the same length and width and a plurality of short rectangles with the same length and width, the first winding structure 5 is not communicated with the second winding structure 6, the length and width of the long rectangles are 2mm and 0.2mm respectively, the distance between a square groove of the radiation surface 3 and the upper side of the edge of the radiation surface 3 is 2.1mm, and the distance between the square groove of the radiation surface 3 and the left side of the edge of the radiation surface 3 is 2.5mm.
As shown in fig. 3, a cross slot 11 of the ground plane is cut in the center of the ground plane 12, two rectangular slots forming the cross slot 11 of the ground plane are perpendicular to each other and have dimensions of 7mm×0.6mm, and the midpoint of the outermost side of the rectangular slot is 0.5mm from the edge of the ground plane 14.
The center of the short-circuit probe is 2.4mm away from the center of the circle of the radiation surface, 1.2mm away from the horizontal distance and 0.3mm in radius; the vertical distance from the center of the coaxial feed center line 14 to the center of the radiation surface is 2.4mm, the horizontal distance is 1.2mm, the radius is 0.3mm, the center of the ground plane coaxial feed ground port 10 is 2.4mm from the vertical axis, and the radius is 0.3mm from the horizontal axis by 1.2 mm;
firstly, cutting a square groove with a chamfer at the center of a radiation surface 3, and then arranging a second winding structure 6 formed by connecting an M shape and an N shape at the left side of the square hole, wherein the first winding structure 5 and the second winding structure 6 are formed by connecting a plurality of long rectangles with the same length and width and a plurality of short rectangles with the same length and width, and the second winding structure is not communicated, so that proper working characteristics are obtained; finally, a ground plane cross groove 11 is formed in the ground plane 12, the antenna obtains circular polarization characteristics, and meanwhile impedance matching of the antenna is optimized.
FIGS. 4 and 5 are respectively a return loss curve and an axial ratio curve of the antenna of the embodiment in the multilayer tissue of the small intestine, skin, fat and muscle with the frequency of 2.4GHz, and as can be seen from FIG. 4, the return loss of the antenna is less than-10 dB in the frequency range of 2.38-2.53GHz, thereby realizing a wide frequency band; from fig. 5, it can be seen that the antenna has an axial ratio of less than 3dB in the frequency band of 2.37-2.53GHz, and circular polarization is achieved. The antenna works in human tissues, the actual bandwidth of the antenna is reduced or offset due to the complex tissue environment, so that the center frequency is not in the bandwidth, and the performance of the antenna is further affected, but the antenna achieves a wide frequency band, the bandwidth is wide enough, the situation that the center frequency of the antenna is not in the bandwidth can be effectively avoided, the antenna has circular polarization characteristics, the influence of polarization mismatch on the communication quality can be reduced, and the antenna can stably work in the frequency band of 2.4-2.48 GHz.
Fig. 6 is a graph showing the current amplitude distribution of the radiation patch of the antenna of the present embodiment in the multilayer tissue of the small intestine, skin, fat and muscle at a frequency of 2.4GHz, and it can be seen from the graph that the current path is increased by the square groove with the cut angle and the short circuit probe 13 is added, effectively reducing the size of the antenna.
Fig. 7 is a graph showing the current amplitude distribution of the ground plane of the antenna of the present embodiment in the multilayer tissue of the small intestine, skin, fat and muscle at a frequency of 2.4GHz, and it can be seen from the graph that by opening the cross-shaped slot, radiation is concentrated mainly near the cross-shaped slot at the frequency point of 2.4 GHz.
Fig. 8 is a radiation pattern of the antenna of the present embodiment in a multilayer tissue of small intestine, skin, fat and muscle at a frequency of 2.4GHz, where E denotes an electric field and H denotes a magnetic field, and it can be seen from the figure that the radiation pattern of the antenna of the present embodiment has a characteristic of being approximately omnidirectional, so as to satisfy engineering requirements.
FIG. 9 shows a capsule antenna housing 15 of the present embodiment, wherein the capsule housing 15 is shaped like a capsule pill for a patient to take, the capsule wall thickness is 0.12mm, and is composed of a cylinder with a radius of 4mm and a height of 8.889mm, and two hemispheres with a radius of 4mm, the two hemispheres are respectively positioned on the upper and lower sides of the cylinder, and the capsule housing 15 is made of polyimide material with a relative dielectric constant epsilon r ＝3.5。
The small circularly polarized implantable antenna for the capsule endoscope provided by the invention adopts a coaxial feed structure, is convenient to install, and further reduces the volume of the antenna by utilizing a short-circuit probe; a novel structure which is approximately symmetrical is designed by a slot loading technology on a square groove which is approximately evenly symmetrical on a radiation surface and adding a winding structure on the radiation surface, so that the antenna has circular polarization characteristics, the actual impedance bandwidth of the antenna is 2.38-2.53GHz, the relative bandwidth reaches 5.8%, compared with the working bandwidth of the antenna, 2.4-2.48GHz, the circular polarization broadband is realized, the center frequency stably works in the bandwidth, the influence of the complex tissue environment of a human body on the performance of the antenna is reduced, the return loss of the antenna at the center frequency respectively reaches-26.6 dB, and meanwhile, the voltage standing wave ratio of the antenna in the whole working bandwidth is smaller than 2. The 3dB axial ratio bandwidth is respectively 2.37-2.67GHz; the effective axial ratio bandwidth is 2.38-2.53GHz, and the relative effective axial ratio bandwidth is 5.8%, so that the circular polarization characteristic is good; the dielectric substrate and the cover layer are made of polyimide flexible materials with dielectric constants of 10.2, and the center frequency of the antenna is tuned by adjusting the size of the winding structure of the radiation surface and the size of the cross-shaped slot of the ground plane, so that broadband characteristics are obtained; the circular polarization characteristic of the antenna is realized by adjusting the positions of the feed point and the short-circuit probe, and the capsule shell is made of polyimide material, so that equipment required by other endoscope systems such as the antenna and the like is prevented from being directly contacted with a human body.
The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to assist in understanding the methods of the present invention and the core ideas thereof; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (6)
1. A small circularly polarized implantable antenna for a capsule endoscope, comprising: the capsule comprises a capsule shell, a medium substrate and a covering layer, wherein the medium substrate and the covering layer are arranged in the capsule shell, and the covering layer is positioned at the top of the medium substrate;
the top of the medium substrate is printed with a radiation surface, the bottom of the medium substrate is printed with a ground plane, the radiation surface is communicated with the ground plane through a short circuit probe and a coaxial feed center line, the short circuit probe and the coaxial feed center line are symmetrically distributed about the center of the medium substrate, and the cover layer is positioned at the top of the radiation surface;
the radiating surface is provided with a radiating surface short-circuit probe welding spot and a radiating surface coaxial feed center line welding spot corresponding to the short-circuit probe and the coaxial feed center line, the radiating surface short-circuit probe welding spot and the radiating surface coaxial feed center line welding spot are symmetrically distributed relative to the radiating surface top center, the radiating surface short-circuit probe welding spot is connected with the short-circuit probe, and the radiating surface coaxial feed center line welding spot is connected with the coaxial feed center line;
the ground plane center is provided with a ground plane cross groove, a ground plane short circuit probe welding spot and a ground plane coaxial feed grounding port are arranged on the ground plane corresponding to the short circuit probe and the coaxial feed center line, the ground plane short circuit probe welding spot and the ground plane coaxial feed grounding port are symmetrically distributed with respect to the ground plane bottom center, the ground plane short circuit probe welding spot is connected with the short circuit probe, and the ground plane coaxial feed grounding port is connected with the coaxial feed center line.
2. The capsule endoscope-oriented compact circular polarization implantable antenna according to claim 1, wherein the first meandering structure is an S-shaped meandering structure formed by a plurality of long rectangles having the same length and width and a plurality of short rectangles having the same length and width, and the second meandering structure is formed by an M-shaped meandering structure and an N-shaped meandering structure connected, wherein the M-shaped meandering structure and the N-shaped meandering structure are each formed by a plurality of long rectangles having the same length and width and a plurality of short rectangles having the same length and width, and the long rectangles having the same length and width of the first meandering structure and the second meandering structure are each formed by a plurality of long rectangles having the same length and width.
3. A compact circular polarized implantable antenna for a capsule endoscope according to claim 1, wherein said ground plane cross-shaped slot is formed as a cross-shape of two rectangular shapes perpendicular to each other and of the same size, and the aspect ratio of the two rectangular shapes is 35:3.
4. The capsule-endoscope-oriented small circularly polarized implantable antenna according to claim 1, wherein the dielectric substrate and the cover layer are formed of rogers RO3010 and have a relative dielectric constant of 10.2.
5. The capsule-endoscope-oriented small circularly polarized implantable antenna according to claim 1, wherein the radiation surface and the ground plane are both circular metal patches, and the shorting probe and the coaxial feed center line are both metal cylinders.
6. The capsule-endoscope-oriented small circularly polarized implantable antenna as claimed in claim 1, wherein the capsule housing is made of polyimide material having a relative dielectric constant ε r ＝3.5。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310910028.8A CN116979252A (en) | 2023-07-24 | 2023-07-24 | Small circularly polarized implantable antenna for capsule endoscope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310910028.8A CN116979252A (en) | 2023-07-24 | 2023-07-24 | Small circularly polarized implantable antenna for capsule endoscope |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116979252A true CN116979252A (en) | 2023-10-31 |
Family
ID=88478931
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310910028.8A Pending CN116979252A (en) | 2023-07-24 | 2023-07-24 | Small circularly polarized implantable antenna for capsule endoscope |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116979252A (en) |
-
2023
- 2023-07-24 CN CN202310910028.8A patent/CN116979252A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109390699B (en) | Small-sized beam controllable patch antenna based on reconfigurable parasitic unit | |
| Liu et al. | A miniaturized CSRR loaded wide-beamwidth circularly polarized implantable antenna for subcutaneous real-time glucose monitoring | |
| KR20030093738A (en) | Chip antenna with parasitic elements | |
| JP2001203521A (en) | Flat microstrip patch antenna | |
| CN113745817B (en) | High-isolation dual-band polarized reconfigurable antenna based on SIW technology | |
| CN105024155A (en) | Circularly polarized antenna provided with complementary split rings and applied to biomedical remote sensing | |
| CN109301475B (en) | Miniaturized broadband flexible implantable antenna | |
| KR20170090026A (en) | implantable antenna having dielectric substrate laminated with ferrite sheet | |
| CN105846074B (en) | A kind of low section differential feed circular polarized antenna for capsule endoscope system | |
| CN116979252A (en) | Small circularly polarized implantable antenna for capsule endoscope | |
| KR100420546B1 (en) | Battery Antenna for portable Wireless Communication Terminal | |
| CN111613871A (en) | Capsule endoscope and dielectric resonator antenna used for same | |
| CN110444879A (en) | A kind of double-frequency broadband implanted antenna loading complementary openings resonance monocycle | |
| CN116130924A (en) | Miniaturized dual-frenquency circular polarization flexible implanted antenna | |
| Ali et al. | Circural planner Inverted-F antenna for implantable biomedical applications | |
| Mainul et al. | A miniaturized triple band DGS implantable antenna for biotelemetry | |
| CN110148832B (en) | Implantable antenna system | |
| JPH09232854A (en) | Small planar antenna system for mobile radio equipment | |
| CN114665254A (en) | Broadband circularly polarized array antenna with sequential phase feed and wearable device | |
| CN118137111A (en) | Miniaturized double-frequency flexible implanted antenna covering ISM frequency band | |
| CN113571884B (en) | Spiral antenna applied to implanted wireless capsule system | |
| CN117977181A (en) | Miniaturized ultra-wideband circularly polarized implantable patch antenna | |
| CN115458932B (en) | Miniaturized flexible wearable antenna capable of improving high-order mode radiation characteristics | |
| CN216450817U (en) | Left-right hand circular polarization reconfigurable implanted antenna and implanted device | |
| CN116505232A (en) | Miniaturized self-duplex implanted antenna |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |