CN216488512U - Electric small-size active antenna suitable for being attached to human body and external receiving instrument - Google Patents
Electric small-size active antenna suitable for being attached to human body and external receiving instrument Download PDFInfo
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- CN216488512U CN216488512U CN202122892372.8U CN202122892372U CN216488512U CN 216488512 U CN216488512 U CN 216488512U CN 202122892372 U CN202122892372 U CN 202122892372U CN 216488512 U CN216488512 U CN 216488512U
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Abstract
The utility model relates to the technical field of medical equipment, and provides an electric small-size active antenna suitable for being attached to a human body and an in-vitro receiver, wherein the electric small-size active antenna comprises: a dielectric substrate; the antenna routing is arranged on the dielectric substrate and is of an inverted F structure, and the radiation part of the antenna routing is distributed along the edge of the dielectric substrate to form a radiation coil; and the radio frequency circuit board is connected with the feed point of the antenna routing. The electric small-size active antenna takes a human body as a loading medium of the antenna by utilizing the characteristic of high dielectric constant of a medium of the human body, is suitable for being attached to the human body, has the characteristics of small size, low cost, high bandwidth, high gain and the like, and can meet the signal transmission requirement between an endoscope and an external receiving instrument only by a single antenna.
Description
Technical Field
The utility model relates to the technical field of medical equipment, in particular to an electric small-size active antenna suitable for being attached to a human body and an in-vitro receiver.
Background
The endoscope is a clinical commonly used auxiliary diagnostic means, with the development of communication technology, a signal transmission cable between the endoscope and the external receiving instrument is replaced by wireless communication, and an antenna is a key device for the wireless communication between the endoscope and the external receiving instrument, so that the transmission effect of image signals is influenced.
At present, an external receiving instrument adopts a multi-antenna structure, a plurality of antennas are arranged on a wearable vest, and image signals collected by an endoscope are obtained. Because the distances between the multiple antennas and the human body are different and are influenced by the human body clothes medium, the working frequency point of the external receiver with the multi-antenna structure is in an unstable state, and the instability of the image signal can be compensated by arranging more than 10 antennas and configuring corresponding algorithms.
SUMMERY OF THE UTILITY MODEL
The utility model provides an electric small-size active antenna suitable for being attached to a human body and an in-vitro receiver, which are used for solving the problem of poor signal transmission quality caused by the structure of the in-vitro receiver in the prior art.
The present invention provides an electrically small-sized active antenna suitable for attachment to a human body, comprising:
a dielectric substrate;
the antenna routing is arranged on the dielectric substrate and is of an inverted F structure, and radiation parts of the antenna routing are distributed along the edge of the dielectric substrate to form radiation coils;
and the radio frequency circuit board is connected with the feed point of the antenna routing.
According to the present invention, there is provided an electrically small-sized active antenna suitable for fitting to a human body, the radio frequency circuit board comprising:
the switch is connected with the feed point of the antenna wiring;
a low noise amplifier connected to the switch;
and the input end of the radio frequency circuit is connected with the low-noise amplifier, and the output end of the radio frequency circuit is connected with the switch.
According to the present invention, there is provided an electrically small-sized active antenna suitable for attachment to a human body, further comprising:
and the feed point of the antenna routing is connected with the radio frequency circuit board through the coaxial line.
According to the active antenna with the small electric size, which is suitable for being attached to a human body, the size of the dielectric substrate is 40mmx40 mm.
According to the small-size active antenna suitable for being attached to a human body, the distance between the dielectric substrate and the radio frequency circuit board ranges from 3mm to 5 mm.
According to the electrically small-sized active antenna suitable for being attached to a human body, the dielectric substrate is prepared from FR4 base materials.
According to the small-size active antenna suitable for being attached to a human body, the first edge of the dielectric substrate is provided with the first through hole and the second through hole, and the feed point of the antenna wiring is close to the first edge of the dielectric substrate;
and a third through hole and a fourth through hole are formed in the second edge of the dielectric substrate, and the third through hole and the fourth through hole are respectively opposite to the first through hole and the second through hole.
According to the electrically small-sized active antenna suitable for being attached to a human body provided by the utility model, the first through hole and the second through hole are positioned outside the radiation coil, and the third through hole and the fourth through hole are positioned inside the radiation coil.
According to the electrically small-sized active antenna suitable for being attached to a human body, the first edge of the dielectric substrate is provided with the copper paving layer.
The utility model also provides an in vitro receiving instrument, comprising:
the equipment body, the equipment body is equipped with as above-mentioned little size active antenna of electricity that is applicable to the laminating human body.
According to the small-size active antenna suitable for being attached to the human body and the in-vitro receiver, the human body is used as a loading medium of the antenna by utilizing the characteristic of high dielectric constant of the medium of the human body, the small-size active antenna is suitable for being attached to the human body, and the small-size active antenna has the advantages of being small in size, low in cost, high in bandwidth, high in gain and the like, and can meet the signal transmission requirement between an endoscope and the in-vitro receiver only through a single antenna.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is one of the structural schematic diagrams of an electrically small-sized active antenna suitable for fitting a human body according to the present invention;
fig. 2 is one of the structural schematic diagrams of the electrically small-sized active antenna suitable for fitting a human body according to the present invention;
fig. 3 is a schematic diagram of the application of the electrically small-sized active antenna suitable for human body fitting provided by the present invention.
Reference numerals:
100: a dielectric substrate; 110: antenna routing; 111: a radiation section;
112: feeding points; 120: a coaxial line; 131: a first via hole;
132: a second via hole; 133: a third via hole; 134: a fourth via hole;
140: copper is paved; 200: a radio frequency circuit board; 210: a switch;
220: a low noise amplifier; 230: a radio frequency circuit; 300: a human body.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.
In embodiments of the utility model, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
An electrically small-sized active antenna suitable for human body fit of the present invention will be described below with reference to fig. 1 to 3.
In the embodiment of the utility model, the small-size active antenna suitable for being attached to a human body is applied to the external receiving instrument, signals are transmitted between the external receiving instrument and the endoscope in a wireless communication mode, and the small-size active antenna suitable for being attached to the human body can effectively improve the transmission effect, safety and reliability of wireless communication between the external receiving instrument and the endoscope.
The electrical dimension is the ratio of the physical length of the signal transmission line to the wavelength, and when the physical dimension of the signal propagation path is sufficiently small compared to the wavelength, the phase shift of the electrical signal after propagation over this distance is negligible, and when the physical dimension of the transmission line is less than 1/10 of the wavelength, it can be considered as the electrically small dimension.
As shown in fig. 1, the electrically small-sized active antenna suitable for human body fitting of the present invention includes: dielectric substrate 100, antenna trace 110 and radio frequency circuit board 200.
The dielectric substrate 100 may mechanically protect and support various components on the electrically small-sized active antenna, and may achieve electrical connection or electrical insulation between the components.
The antenna trace 110 is a component of the electrically small active antenna that receives signals transmitted by the endoscope, and may also be referred to as a receive antenna module.
The antenna trace 110 is disposed on the dielectric substrate 100, and the antenna trace 110 has an inverted F-shaped structure, and has the advantages of small volume, simple structure, easy matching, low manufacturing cost, and the like.
The radiation portion 111 of the antenna trace 110 is a portion of the antenna trace 110 that mainly radiates electromagnetic waves, and the radiation portion 111 of the antenna trace 110 is distributed along an edge of the dielectric substrate 100 to form a radiation coil.
In this embodiment, the radiation portion 111 of the antenna trace 110 is deformed by rotating counterclockwise, so as to extend the path of the radiation portion 111, and form a radiation coil on the dielectric substrate 100.
It is understood that the radiation portions 111 are distributed along the edge of the dielectric substrate 100 to form a radiation coil, and the radiation coil may include a plurality of coils.
On the dielectric substrate 100, the radiation portion 111 of the antenna trace 110 is deformed by rotating counterclockwise, so that the path of the radiation portion 111 is extended, the radiation effect is enhanced, and the size of the antenna can be effectively reduced by the radiation coil.
In this embodiment, the electrically small-sized active antenna is suitable for being attached to a human body, the antenna wiring 110 portion of the electrically small-sized active antenna is attached to the human body, and the human body is used as a loading medium of the antenna by utilizing the characteristic of high dielectric constant of the medium of the human body, so that the size of the antenna is greatly reduced, and the communication requirement between the external receiving instrument and the endoscope can be met by utilizing the structure of the single antenna.
The rf circuit board 200 is a substrate provided with the rf circuit 230, the feed point 112 of the antenna trace 110 is a connection position of the cable and the antenna trace 110, and the rf circuit board 200 is connected to the feed point 112 of the antenna trace 110, so as to realize signal transmission between the antenna trace 110 and the rf circuit board 200.
In actual execution, actual measurement data under simulated human body environment and actual clinical test show that the effective bandwidth of the electric small-size active antenna suitable for being attached to a human body reaches 100MHz, the maximum radiation gain of a far field is-2.7 db, and stable and reliable signal transmission of the in-vitro single-antenna wireless receiving device is met.
In the related technology, the external receiving instrument in the wireless capsule endoscope system adopts multiple antennas, the external receiving instrument is worn on the body through a vest, and because the distance between the antennas and the human body is not fixed and is influenced by the medium of the human body, the working frequency point of the antennas is in an unstable state, more than 10 antennas are needed, and the instability of signals is compensated through an algorithm.
The utility model utilizes the characteristic of high dielectric constant of the medium of the human body, takes the human body as the loading medium of the antenna, and the electrically small-sized active antenna is suitable for being attached to the human body, thereby greatly reducing the size of the antenna, greatly improving the bandwidth of transmission signals between the endoscope and the external receiving instrument, reducing the frequency drift effect generated by the complicated and changeable environment in the human body and having good robustness.
According to the electrically small-sized active antenna suitable for being attached to the human body, the human body is used as a loading medium of the antenna by utilizing the characteristic of high dielectric constant of the medium of the human body, the electrically small-sized active antenna is suitable for being attached to the human body, the electrically small-sized active antenna has the characteristics of small size, low cost, high bandwidth, high gain and the like, and the signal transmission requirement between the endoscope and the in-vitro receiver can be met only by a single antenna.
In some embodiments, as shown in fig. 2, rf circuit board 200 includes: a switch 210, a low noise amplifier 220, and a radio frequency circuit 230.
The switch 210 is connected to the feed point 112 of the antenna trace 110, the switch 210 controls the on/off of the signal transmission between the antenna trace 110 and the rf circuit board 200, the input terminal of the rf circuit 230 is connected to the low noise amplifier 220, and the output terminal of the rf circuit 230 is connected to the switch 210.
The low noise amplifier 220 is connected to the switch 210, and the signal transmitted from the endoscope in the body received by the antenna trace 110 is transmitted to the low noise amplifier 220 for processing.
The low noise amplifier 220 is an amplifier with a very low noise figure, and is generally used as a high frequency or intermediate frequency preamplifier for various radio receivers and an amplifying circuit for a high sensitivity electronic detection device.
In the case of amplifying a weak signal, the noise of the conventional amplifier may cause serious interference to the signal, and the low noise amplifier 220 may reduce the noise and improve the signal-to-noise ratio of the output.
In this embodiment, the low noise amplifier 220 is added to the circuit structure of the rf circuit board 200 to form a complete electrically small-sized active antenna structure, which has the characteristics of low cost, high bandwidth, high gain, low noise, and the like.
In some embodiments, as shown in fig. 3, the feed structure of the electrically small-sized active antenna adapted to fit the human body is a coaxial feed structure, and the dielectric substrate 100 and the rf circuit board 200 are connected together by using the coaxial line 120.
The coaxial line 120 is a broadband microwave transmission line formed by two coaxial cylindrical conductors, and air or a high-frequency medium is filled between the inner conductor and the outer conductor.
In this embodiment, one end of the coaxial line 120 is connected to the feed point 112 of the antenna trace 110, and the other end is connected to the rf circuit board 200.
In some embodiments, as shown in fig. 1, the dielectric substrate 100 may have dimensions of 40mmx40 mm.
The HFSS finite element modeling simulation is used for testing the electric small-size active antenna suitable for being attached to a human body, and the test result shows that the electric small-size active antenna under the size meets the signal transmission requirement between the endoscope and the in-vitro receiver.
In some embodiments, the dielectric substrate 100 can be prepared using FR4 substrate.
FR4 is a code for a grade of flame-resistant material, which refers to a material specification for which the corresponding material must be capable of self-extinguishing when subjected to a fire.
In practical implementation, the FR4 substrate may be a FR4 epoxy fiberglass cloth substrate, a substrate with epoxy resin as an adhesive and electronic grade fiberglass cloth as a reinforcing material, and has the characteristics of excellent electrical performance, high temperature resistance, excellent processability, and the like.
In some embodiments, the dielectric substrate 100 is spaced from the rf circuit board 200 by a distance in a range from 3mm to 5 mm.
The dielectric substrate 100 and the radio frequency circuit board 200 can be folded, the radio frequency circuit board 200 is located below the dielectric substrate 100, and the distance between the dielectric substrate 100 and the radio frequency circuit board 200 ranges from 3mm to 5 mm.
As shown in fig. 3, the dielectric substrate 100 is a substrate attached to a human body 300, the rf circuit board 200 and the dielectric substrate 100 are folded, and the rf circuit board 200 and the dielectric substrate 100 may be connected by a coaxial line 120.
It is understood that the area of the rf circuit board 200 is smaller than that of the dielectric substrate 100, and when the size of the dielectric substrate 100 is 40mmx40mm, the overall size of the dielectric substrate 100 and the rf circuit board 200 can be controlled within 40mmx40mmx6 mm.
That is, the size of the electrically small-sized active antenna suitable for being attached to a human body can be controlled within 40mmx40mmx6mm, the electrically small-sized active antenna has a small size and can be attached to any position of the human body, the antenna routing 110 on the dielectric substrate 100 can greatly improve the bandwidth of signals transmitted between the endoscope and the external receiving instrument, the frequency drift effect generated by a complicated and variable environment inside the human body is reduced, and the robustness is good.
In some embodiments, as shown in fig. 1, the first edge of the dielectric substrate 100 is provided with a first via 131 and a second via 132, and the second edge of the dielectric substrate 100 is provided with a third via 133 and a fourth via 134.
In an electrically small active antenna suitable for fitting to a human body, to reduce the coupling between the antenna trace 110 and the rf circuit 230, an additional metal layer is added between the two layers, which is considered as a ground plane of the electrically small active antenna.
The evenly distributed via holes are connected with the ground plane, the current distribution on the ground plane of the electrically small-sized active antenna changes, and the position and the number of the via holes influence the performance of the electrically small-sized active antenna.
In this embodiment, the dielectric substrate 100 is provided with four vias: the first via hole 131, the second via hole 132, the third via hole 133, and the fourth via hole 134, which are respectively and uniformly distributed at four corners of the dielectric substrate 100, may achieve an effect of increasing a bandwidth of the electrically small-sized active antenna.
In practical implementation, the first via hole 131 and the second via hole 132 are distributed at the position where the feed point 112 of the antenna trace 110 is close to the first edge of the dielectric substrate 100, the third via hole 133 and the fourth via hole 134 are respectively disposed over against the first via hole 131 and the second via hole 132, and the four via holes are respectively and uniformly distributed at four corners of the dielectric substrate 100.
In some embodiments, the first via 131 and the second via 132 are located outside the radiation coil formed by the antenna trace 110, and the third via 133 and the fourth via 134 are located inside the radiation coil formed by the antenna trace 110.
In some embodiments, the first side of the dielectric substrate 100 may be provided with a copper blanket 140.
The copper plating 140 is filled with solid copper in a certain area of the dielectric substrate 100, so as to achieve the purposes of effectively reducing the ground wire impedance, improving the anti-interference capability, reducing the voltage drop and improving the power efficiency.
In this embodiment, the copper layer 140 is disposed on the first side of the dielectric substrate 100, and the first via 131 and the second via 132 are disposed on the first side of the dielectric substrate 100, so that the copper layer 140 is connected to the ground plane, thereby reducing the reflow area of the signal line and reducing the electromagnetic interference of the signal to the outside.
The utility model also provides an in vitro receiving instrument, wherein the equipment body of the in vitro receiving instrument is provided with the electric small-size active antenna suitable for being attached to a human body.
The signal is transmitted between the external receiver and the endoscope in a wireless communication mode, and the small-size active antenna suitable for being attached to a human body can effectively improve the transmission effect, safety and reliability of wireless communication between the external receiver and the endoscope.
In this embodiment, the endoscope is a detection device placed inside the human body, and can collect images inside the human body and transmit the images to an external receiving instrument.
In practical implementation, the endoscope can be a capsule endoscope, the shape of the capsule endoscope is like that of a capsule medicament, the capsule endoscope is swallowed for use, the swallowed capsule endoscope runs along the digestive direction along with the movement of gastrointestinal muscles, images are shot, and then the images are transmitted to an in-vitro receiving instrument.
According to the external receiving instrument provided by the utility model, the human body is used as the loading medium of the antenna by utilizing the characteristic of high dielectric constant of the medium of the human body, the electrically small-sized active antenna is suitable for being attached to the human body, and the external receiving instrument has the characteristics of small size, low cost, high bandwidth, high gain and the like, and can meet the signal transmission requirement between the endoscope and the external receiving instrument only by a single antenna.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. An electrically small-sized active antenna adapted to fit a human body, comprising:
a dielectric substrate;
the antenna routing is arranged on the dielectric substrate and is of an inverted F structure, and radiation parts of the antenna routing are distributed along the edge of the dielectric substrate to form radiation coils;
and the radio frequency circuit board is connected with the feed point of the antenna routing.
2. The electrically small-sized active antenna adapted to fit the human body according to claim 1, wherein the radio frequency circuit board comprises:
the switch is connected with the feed point of the antenna wiring;
a low noise amplifier connected to the switch;
and the input end of the radio frequency circuit is connected with the low-noise amplifier, and the output end of the radio frequency circuit is connected with the switch.
3. The electrically small-sized active antenna adapted to fit the human body according to claim 2, further comprising:
and the feed point of the antenna routing is connected with the radio frequency circuit board through the coaxial line.
4. The electrically small sized active antenna adapted to fit the human body as claimed in claim 1, wherein the dielectric substrate has a size of 40mmx40 mm.
5. The electrically small sized active antenna suitable for fitting human body according to claim 1, wherein the distance between the dielectric substrate and the radio frequency circuit board is in the range of 3mm to 5 mm.
6. The electrically small-sized active antenna suitable for human body fitting according to claim 1, wherein said dielectric substrate is prepared using FR4 substrate.
7. The electrically small-sized active antenna suitable for human body fitting according to any of claims 1 to 6, wherein the first edge of the dielectric substrate is provided with a first via hole and a second via hole, and the feed point of the antenna trace is close to the first edge of the dielectric substrate;
and a third through hole and a fourth through hole are formed in the second edge of the dielectric substrate, and the third through hole and the fourth through hole are respectively opposite to the first through hole and the second through hole.
8. The electrically small-sized active antenna adapted to fit a human body according to claim 7, wherein said first and second vias are located outside said radiating coil, and said third and fourth vias are located inside said radiating coil.
9. An electrically small active antenna suitable for fitting to the human body as claimed in claim 7, wherein the first edge of the dielectric substrate is provided with a copper layer.
10. An extracorporeal receiver, comprising:
device body provided with an electrically small-sized active antenna suitable for fitting to the human body according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122892372.8U CN216488512U (en) | 2021-11-23 | 2021-11-23 | Electric small-size active antenna suitable for being attached to human body and external receiving instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122892372.8U CN216488512U (en) | 2021-11-23 | 2021-11-23 | Electric small-size active antenna suitable for being attached to human body and external receiving instrument |
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| Publication Number | Publication Date |
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| CN216488512U true CN216488512U (en) | 2022-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122892372.8U Active CN216488512U (en) | 2021-11-23 | 2021-11-23 | Electric small-size active antenna suitable for being attached to human body and external receiving instrument |
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| Country | Link |
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| CN (1) | CN216488512U (en) |
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2021
- 2021-11-23 CN CN202122892372.8U patent/CN216488512U/en active Active
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