CN114284706B - Double-lens capsule - Google Patents
Double-lens capsule Download PDFInfo
- Publication number
- CN114284706B CN114284706B CN202111679346.5A CN202111679346A CN114284706B CN 114284706 B CN114284706 B CN 114284706B CN 202111679346 A CN202111679346 A CN 202111679346A CN 114284706 B CN114284706 B CN 114284706B
- Authority
- CN
- China
- Prior art keywords
- lens
- circuit board
- antenna
- capsule
- spiral antenna
- 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.)
- Active
Links
- 239000002775 capsule Substances 0.000 title claims abstract description 50
- 239000002184 metal Substances 0.000 claims description 13
- 230000009977 dual effect Effects 0.000 claims description 7
- 239000004020 conductor Substances 0.000 claims description 4
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 230000005855 radiation Effects 0.000 abstract description 21
- 238000004891 communication Methods 0.000 abstract description 15
- 239000007769 metal material Substances 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- 230000010287 polarization Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009713 electroplating Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
Landscapes
- Aerials With Secondary Devices (AREA)
Abstract
The invention discloses a double-lens capsule, comprising: the device comprises a first lens and a second lens which are respectively arranged at two ends of the capsule, a battery and a circuit board which are sequentially arranged between the first lens and the second lens, and a spiral antenna which is arranged at the periphery of the circuit board and connected with the circuit board. The double-lens capsule adopts the spiral antenna, and the spiral antenna is arranged on the periphery of the circuit board, and because the current on the side surface of the circuit board is smaller, the interference of the circuit board on the antenna radiation signals can be reduced, the reflection of the metal material on the surface of the battery on the radiation signals can be reduced, the overall radiation efficiency of the antenna can be improved, the communication quality of the capsule system can be guaranteed, and the communication distance between the recorder and the communication quality can be increased.
Description
Technical Field
The invention relates to the technical field of capsule endoscopes, in particular to a double-lens capsule.
Background
The problem of dual-lens capsule communication is always a big difficulty that puzzles dual-lens capsule design, because there is the camera lens on both sides of dual-lens capsule, receives the structure restriction, and the antenna in prior art can only design at the capsule middle part, specifically sets up between battery and circuit board (as shown in fig. 1), but because there is the electric current in the circuit board can produce the interference to the antenna again, and the battery surface is metal material, has the effect of reflection again to the radiation signal, leads to the antenna radiation efficiency very poor, makes the communication distance between dual-lens capsule and the record appearance short.
In view of this, how to provide a dual lens capsule solving the above technical problems is a problem that needs to be solved by those skilled in the art.
Disclosure of Invention
The embodiment of the invention aims to provide a double-lens capsule, which can improve the overall radiation efficiency of an antenna in the use process, is beneficial to ensuring the communication quality of a capsule system and increasing the communication distance between the capsule system and a recorder.
In order to solve the above technical problems, an embodiment of the present invention provides a dual-lens capsule, including: the device comprises a first lens and a second lens which are respectively arranged at two ends of the capsule, a battery and a circuit board which are sequentially arranged between the first lens and the second lens, and a spiral antenna which is arranged at the periphery of the circuit board and connected with the circuit board.
Optionally, the antenna further comprises a shielding framework arranged on the periphery of the circuit board, and the spiral antenna is arranged on the outer side wall of the shielding framework.
Optionally, the inner side wall of the shielding framework is provided with a ground plane.
Optionally, the ground plane is a grounded electroplated metal layer.
Optionally, the antenna further comprises a coaxial line corresponding to the spiral antenna, wherein the spiral antenna is connected with the circuit board through one end of the coaxial line, and the outer conductor side of the coaxial line is connected with the ground plane.
Optionally, the spiral antenna is tightly wound on the outer side wall of the shielding framework.
Optionally, the shielding framework is made of polytetrafluoroethylene.
The embodiment of the invention provides a dual-lens capsule, which comprises: the device comprises a first lens and a second lens which are respectively arranged at two ends of the capsule, a battery and a circuit board which are sequentially arranged between the first lens and the second lens, and a spiral antenna which is arranged at the periphery of the circuit board and connected with the circuit board.
Therefore, the dual-lens capsule provided by the embodiment of the invention adopts the spiral antenna, and the spiral antenna is arranged on the periphery of the circuit board, so that the interference of the circuit board on the antenna radiation signal can be reduced, the reflection of the battery surface metal material on the radiation signal can be reduced, the overall radiation efficiency of the antenna can be improved, the communication quality of a capsule system can be ensured, and the communication distance between the recorder and the antenna can be increased.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required in the prior art and the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a dual lens capsule;
fig. 2 is a schematic structural diagram of a dual-lens capsule according to an embodiment of the present invention;
fig. 3 is a schematic cross-sectional view of a dual-lens capsule according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a spiral antenna and a shielding framework of a dual-lens capsule according to an embodiment of the present invention;
FIG. 5 is a circular symmetry pattern corresponding to the plane of the helical axis of the helical antenna according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a helical antenna according to an embodiment of the present invention;
fig. 7 is a schematic diagram corresponding to fig. 6.
Detailed Description
The embodiment of the invention provides a double-lens capsule, which can improve the overall radiation efficiency of an antenna in the use process, is beneficial to ensuring the communication quality of a capsule system and increasing the communication distance between the capsule system and a recorder.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a dual-lens capsule according to an embodiment of the invention. The dual lens capsule includes: the first lens 1 and the second lens 2 are respectively arranged at two ends of the capsule, the battery 3 and the circuit board 4 are sequentially arranged between the first lens 1 and the second lens 2, and the spiral antenna 5 is arranged at the periphery of the circuit board 4 and connected with the circuit board 4.
It should be noted that, in the embodiment of the present invention, the first lens 1 and the second lens 2 of the dual-lens capsule are disposed at two ends of the capsule, and the battery 3 and the circuit board 4 are sequentially disposed between the first lens 1 and the second lens 2, and the antenna in the embodiment of the present invention adopts the spiral antenna 5, and the spiral antenna 5 can be disposed at the periphery of the circuit board 4 and connected with the circuit board 4, and since the interference current on the side surface of the circuit board 4 is smaller, the effect of the current in the circuit board 4 on the radiation signal of the spiral antenna 5 can be reduced by disposing the spiral antenna 5 at the periphery of the circuit board 4. In addition, the spiral antenna 5 is arranged on the periphery of the circuit board 4 and is far away from the battery, so that reflection of a metal material on the surface of the battery on radiation signals can be reduced, and the overall radiation efficiency of the spiral antenna 5 can be improved.
Further, please refer to fig. 3 to 4. The dual-lens capsule may further include a shielding frame 6 disposed at the periphery of the circuit board 4, and the helical antenna 5 is disposed on an outer sidewall of the shielding frame 6.
Specifically, in order to further reduce the influence of the current in the circuit board 4 on the radiation signal of the spiral antenna 5 in the embodiment of the present invention, a shielding framework 6 may be disposed at the periphery of the circuit board 4, the spiral antenna 5 is disposed on the outer side wall of the shielding framework 6, and may be tightly wound on the outer side wall of the shielding framework 6, where the shielding framework 6 is used to shield the interference signal generated by the current of the circuit board 4, so as to improve the signal radiation efficiency of the spiral antenna 5, and further improve the communication quality of the capsule system.
The shielding skeleton 6 may be specifically a shielding skeleton made of polytetrafluoroethylene, so as to further improve the shielding effect on the interference signal generated by the current in the circuit board 4.
Furthermore, the inner side wall of the shielding framework 6 in the embodiment of the invention is provided with a ground plane 7, wherein the ground plane 7 is a grounded electroplated metal layer.
It should be noted that, specifically, the electroplated metal layer can be made on the inner wall of the shielding framework 6 by electroplating metal powder, and the electroplated metal layer is grounded, so that the electroplated metal layer is used as the ground plane 7 of the spiral antenna 5, the metal spiral line with good conductivity is fixed on the shielding framework 6, the spiral antenna 5 and the shielding framework 6 can be integrally formed, the design of the ground plane 7 can effectively improve the signal gain of the spiral antenna 5 in the double-lens capsule, effectively improve the radiation level of the capsule antenna, and ensure the communication quality of the capsule system.
Furthermore, the dual-lens capsule according to the embodiment of the present invention may further include a coaxial line corresponding to the spiral antenna 5, wherein the spiral antenna 5 is connected to the circuit board 4 through one end of the coaxial line, and an outer conductor side of the coaxial line is connected to the ground plane.
It will be appreciated that the helical antenna is a helical antenna, and is fed by a coaxial line, and in practical application, in order to better shield external interference signals, the helical antenna may be further disposed on a coaxial line corresponding to the helical antenna 5, and connected to one end of the helical antenna through the core line of the coaxial line, and the outer conductor side of the coaxial line is connected to the ground plane.
The advantages of a helical antenna are presented below:
because the spiral antenna has the characteristics of wide frequency band, circular polarization and low section, the spiral antenna 5 in the embodiment of the invention has the advantages that the circular polarization antenna can receive incoming waves with arbitrary polarization, the radiation waves can also be received by any polarization antenna, the circular polarization antenna has the orthogonality of the rotation direction, the rotation direction is reversed when the polarization waves are incident to symmetrical targets (such as a plane, a spherical surface and the like), and the electromagnetic waves with different directions have polarization isolation with larger values.
The design of the spiral antenna 5 in the embodiment of the invention can realize impedance matching between the antenna and the feeder, and the characteristic impedance of the transmitting antenna is equal to the characteristic impedance of the feeder when transmitting signals, so that the best signal gain can be obtained:
wherein the input impedance expression is as follows:
where C' represents the circumference of the helical antenna and λ represents the wavelength.
The spiral antenna 5 in the embodiment of the invention has a 8-shaped directional diagram on a plane containing the spiral axis, has maximum radiation on a plane perpendicular to the spiral axis, and obtains a circularly symmetrical directional diagram on the plane (as shown in fig. 5), so that the external recorder can receive the image signals transmitted back by the capsule no matter any angle in the body.
Specifically, referring to fig. 6 and 7, the principle of the helical antenna is as follows:
where D in fig. 6 and 7 represents the diameter of the helical antenna, L represents the length of the helical antenna, ρ represents the pitch, I and II represent two corresponding points on the helical antenna, respectively, C represents the speed of light, and θ represents the lead angle of the pitch.
The electromagnetic wave moves at constant speed along the metal spiral line at the light speed C, and the required time is from the point I to the point II, namely, a spiral is carried out:
T＝πD/C
for a helical antenna, the axial electromagnetic wave only moves by a pitch ρ, and the axial equivalent rate is as follows:
υ＝ρ/t＝ρ/C(πD)
specifically, as shown in FIG. 7, v=Csin θ=C ρ/(pi D) is less than or equal to C
As can be seen from the above formula, v is always less than or equal to C, so that the spiral antenna can slow down the motion speed of electromagnetic waves, and is a slow wave system, and the equivalent wavelength lambda of the slow wave system is equivalent to or less than the working wavelength lambda. For helical antennas, it should resonate at 1/4 of its equivalent wavelength, thus enabling the geometric length of the helical antenna to be shortened.
In practical application, for a dual-lens capsule operating at a certain center frequency, the number of coils N required to be wound by the spiral antenna can be approximately calculated by the following formula:
wherein f is the center frequency of the dual lens capsule.
Therefore, the dual-lens capsule in the embodiment of the invention adopts the spiral antenna, and the spiral antenna is arranged on the periphery of the circuit board, and because the current on the side surface of the circuit board is smaller, the interference of the circuit board on the antenna radiation signals can be reduced, the reflection of the battery surface metal material on the radiation signals can be reduced, the overall radiation efficiency of the antenna can be improved, the communication quality of a capsule system can be ensured, and the communication distance between the recorder and the antenna can be increased.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
It should also be noted that in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (3)
1. A dual lens capsule, comprising: the device comprises a first lens and a second lens which are respectively arranged at two ends of a capsule, a battery and a circuit board which are sequentially arranged between the first lens and the second lens, and a spiral antenna which is arranged at the periphery of the circuit board and is connected with the circuit board; wherein:
the spiral antenna is tightly wound on the outer side wall of the shielding framework;
the inner side wall of the shielding framework is provided with a ground plane;
the ground plane is a grounded electroplated metal layer, and the grounded electroplated metal layer is formed by manufacturing the grounded electroplated metal layer on the inner side wall of the shielding framework in a mode of electroplated metal powder and grounding the electroplated metal layer.
2. The dual lens capsule of claim 1, further comprising a coaxial line corresponding to the helical antenna, the helical antenna being connected to the circuit board through one end of the coaxial line, an outer conductor side of the coaxial line being connected to the ground plane.
3. The dual lens capsule of claim 1, wherein the shielding framework is a polytetrafluoroethylene-based shielding framework.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111679346.5A CN114284706B (en) | 2021-12-31 | 2021-12-31 | Double-lens capsule |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111679346.5A CN114284706B (en) | 2021-12-31 | 2021-12-31 | Double-lens capsule |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114284706A CN114284706A (en) | 2022-04-05 |
| CN114284706B true CN114284706B (en) | 2024-04-05 |
Family
ID=80879859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111679346.5A Active CN114284706B (en) | 2021-12-31 | 2021-12-31 | Double-lens capsule |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114284706B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001251132A (en) * | 2000-03-03 | 2001-09-14 | Sharp Corp | Quadrilateral spiral antenna |
| KR20040056425A (en) * | 2002-12-23 | 2004-07-01 | 엘지전자 주식회사 | Helical antenna |
| CN102089929A (en) * | 2008-05-13 | 2011-06-08 | 萨恩特尔有限公司 | A dielectrically-loaded antenna |
| CN209661592U (en) * | 2018-12-14 | 2019-11-22 | 重庆金山医疗器械有限公司 | Double lens type capsule endoscope |
| CN211743378U (en) * | 2020-04-09 | 2020-10-23 | 深圳市资福医疗技术有限公司 | Antenna structure of double-lens capsule endoscope |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2908931B1 (en) * | 2006-11-21 | 2009-02-13 | Centre Nat Rech Scient | INTEGRATED TERAHERTZ ANTENNA AND TRANSMITTER / RECEIVER, AND PROCESS FOR THEIR MANUFACTURE. |
| US20140358140A1 (en) * | 2008-10-21 | 2014-12-04 | Microcube, Llc | Microwave treatment devices and methods |
| US9985334B2 (en) * | 2015-10-21 | 2018-05-29 | Johnson & Johnson Vision Care, Inc. | Antenna mandrel with multiple antennas |
| US20170149125A1 (en) * | 2015-11-19 | 2017-05-25 | Getac Technology Corporation | Helix antenna device |
-
2021
- 2021-12-31 CN CN202111679346.5A patent/CN114284706B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001251132A (en) * | 2000-03-03 | 2001-09-14 | Sharp Corp | Quadrilateral spiral antenna |
| KR20040056425A (en) * | 2002-12-23 | 2004-07-01 | 엘지전자 주식회사 | Helical antenna |
| CN102089929A (en) * | 2008-05-13 | 2011-06-08 | 萨恩特尔有限公司 | A dielectrically-loaded antenna |
| CN209661592U (en) * | 2018-12-14 | 2019-11-22 | 重庆金山医疗器械有限公司 | Double lens type capsule endoscope |
| CN211743378U (en) * | 2020-04-09 | 2020-10-23 | 深圳市资福医疗技术有限公司 | Antenna structure of double-lens capsule endoscope |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114284706A (en) | 2022-04-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2863148A (en) | Helical antenna enclosed in a dielectric | |
| US20150214634A1 (en) | Dual-polarized dipole antenna | |
| JP2013013084A (en) | Antenna and communication device thereof | |
| US20210234279A1 (en) | Circularly polarized antenna | |
| US3503075A (en) | Helix antenna with polarization control | |
| CN109346830B (en) | All-metal four-arm equiangular spiral circularly polarized antenna unit | |
| JP7460100B2 (en) | A novel H-plane SIW horn antenna based on metasurface units | |
| CN106654540B (en) | Antenna element assembly and spotlight antenna | |
| CN114284706B (en) | Double-lens capsule | |
| CN211743403U (en) | Circularly polarized positioning antenna and wearable equipment | |
| CN111029766B (en) | Horizontal polarization omnidirectional antenna based on artificial local surface plasmon | |
| CN111490352A (en) | Circularly polarized positioning antenna and wearable equipment | |
| CN115939740A (en) | Omnidirectional circularly polarized antenna, cascade antenna and antenna array | |
| CN103682665B (en) | A kind of metamaterial microwave antenna | |
| US9831554B2 (en) | Antenna apparatus | |
| US11682839B2 (en) | Antenna, transmitting device, receiving device and wireless communication system | |
| TWI515960B (en) | Antenna and communication device thereof | |
| CN103594786B (en) | Miniaturization spiral PIFA antenna with UHF band | |
| CN103682663B (en) | A kind of metamaterial microwave antenna | |
| CN210129582U (en) | Coplanar dual-frequency horizontal omnidirectional WIFI antenna | |
| CN110011042A (en) | Small-sized linear polarization transceiver common-frequency aerial | |
| CN110854519B (en) | Conformal antenna device | |
| KR102003955B1 (en) | Compact Broadband Dipole Antenna | |
| CN114300833B (en) | Cone antenna and digital broadcasting antenna | |
| CN103682671B (en) | A kind of metamaterial microwave 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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |