CN112688054A - High-performance wearable AIS antenna - Google Patents
High-performance wearable AIS antenna Download PDFInfo
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- CN112688054A CN112688054A CN202011442437.2A CN202011442437A CN112688054A CN 112688054 A CN112688054 A CN 112688054A CN 202011442437 A CN202011442437 A CN 202011442437A CN 112688054 A CN112688054 A CN 112688054A
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- 238000005452 bending Methods 0.000 claims abstract description 45
- 230000005855 radiation Effects 0.000 claims abstract description 45
- 238000004891 communication Methods 0.000 claims abstract description 6
- 230000005284 excitation Effects 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 abstract description 5
- 230000005684 electric field Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 7
- 230000008901 benefit Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000003071 parasitic effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical compound C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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Abstract
A high performance wearable AIS antenna comprising: a flexible circuit board for providing a mounting surface; a dipole antenna for communication; the dipole antenna is attached to the mounting surface; the bending matching balun line is used for improving the impedance matching of the dipole antenna; the bending matching balun line is arranged around the dipole antenna; the radio frequency coaxial line is used for feeding and exciting the dipole antenna; the radio frequency coaxial line is respectively connected with the flexible circuit board, the dipole antenna and the bending matching balun line. According to the antenna, the dipole antenna is loaded on the flexible circuit board, and the AIS antenna can be flexibly bent, so that the antenna is convenient for a human body to wear; the bending matching balun line is designed, so that the impedance matching of the dipole antenna is improved, and the influence of human bodies and equipment on the performance of the antenna is avoided; a hollow area is formed at the radiation tail end of the antenna radiation pole, an electric field transmission path is extended, the equivalent physical wavelength of the AIS antenna is increased, and the size of the antenna is effectively reduced.
Description
Technical Field
The invention belongs to the technical field of AIS communication, and particularly relates to a high-performance wearable AIS antenna.
Background
As an emergency life-saving alarm device for daily work, an AIS (Automatic identification system) positioning life jacket can be widely used for water-borne operation ships such as various working ships, engineering ships, fishing ships, passenger ships and the like. With the continuous development and application of AIS technology and GPS/big dipper technology, in order to let the personnel of falling into the water obtain effective rescue in the shortest time, higher requirement has been proposed to AIS life saving equipment. Because the AIS works in VHF (Very high frequency), the quiet zone level radius of the antenna is about 0.45m, and in practical application, human bodies and equipment are in the quiet zone level range of the antenna, so that the performance of the antenna is greatly influenced, and the search and rescue time efficiency of the AIS search and rescue equipment is directly influenced.
Disclosure of Invention
In view of the above, the present invention provides a high performance wearable AIS antenna that overcomes or at least partially solves the above mentioned problems.
In order to solve the technical problem, the invention provides a high-performance wearable AIS antenna, which comprises:
a flexible circuit board for providing a mounting surface;
a dipole antenna for communication; the dipole antenna is attached to the mounting surface;
the bending matching balun line is used for improving the impedance matching of the dipole antenna; the bending matching balun line is arranged around the dipole antenna;
the radio frequency coaxial line is used for feeding and exciting the dipole antenna; the radio frequency coaxial line is respectively connected with the flexible circuit board, the dipole antenna and the bending matching balun line.
Preferably, the thickness H of the flexible circuit board satisfies: 0.025mm ≦ H ≦ 1 mm; the dielectric constant epsilon satisfies: 2 ≦ ε ≦ 10; a loss tangent of 0.02 or less.
Preferably, the dipole antenna comprises: first antenna radiation pole and second antenna radiation pole, first antenna radiation pole with pass through between the second antenna radiation pole the radio frequency coaxial line is connected.
Preferably, a hollow area is formed at the radiation tail end of the first antenna radiation pole and/or the second antenna radiation pole.
Preferably, a GPS antenna or a Beidou antenna is integrated in the excavated area.
Preferably, the length e and the width f of the hollowed area satisfy: 2mm < e < 25mm, 1mm < f < 20 mm.
Preferably, the radio frequency coaxial line comprises: the coaxial radio frequency feeder comprises a coaxial radio frequency feeder inner core and a radio frequency feeder outer shielding layer, wherein the radio frequency feeder outer shielding layer wraps the coaxial radio frequency feeder inner core, the coaxial radio frequency feeder inner core is communicated with the first antenna radiation pole to carry out excitation feeding, and the radio frequency feeder outer shielding layer is communicated with the second antenna radiation pole to form a loop.
Preferably, the bending matching balun line comprises: the antenna comprises a first bending matching balun arm, a second bending matching balun arm and a bending matching balun short-circuit tail end, wherein the first bending matching balun arm and the second bending matching balun arm are parallel to each other and surround a second antenna radiation pole in the dipole antenna, a first end of the first bending matching balun arm is connected with a coaxial radio frequency feeder inner core in the radio frequency coaxial line, a second end of the first bending matching balun arm is connected with a first end of the bending matching balun short-circuit tail end, a first end of the second bending matching balun arm is connected with a radio frequency feeder outer shielding layer in the radio frequency coaxial line, a second end of the second bending matching balun arm is connected with a second end of the bending matching balun short-circuit tail end, and the bending matching balun short-circuit tail end is in short circuit with the radio frequency feeder outer shielding layer.
Preferably, the length L of the first bending matching balun arm satisfies: 300mm ≦ L ≦ 550mm, and a distance D between the second bent matching balun arm and the second antenna radiating pole satisfies: 1mm < D < 10mm, and the distance D between the first and second curved matching balun arms satisfies: 0.2mm ≦ d ≦ 5 mm.
Preferably, the width W of the bend matching balun line satisfies: 0.05mm ≦ W ≦ 5 mm.
One or more technical solutions in the embodiments of the present invention have at least the following technical effects or advantages: according to the high-performance wearable AIS antenna, the dipole antenna is loaded on the flexible circuit board, and the AIS antenna can be flexibly bent, so that the antenna is convenient for a human body to wear; the bending matching balun line is designed, so that the impedance matching of the dipole antenna is improved, and the influence of human bodies and equipment on the performance of the antenna is avoided; a hollow area is formed at the radiation tail end of the antenna radiation pole, an electric field transmission path is extended, the equivalent physical wavelength of the AIS antenna is increased, and the size of the antenna is effectively reduced; meanwhile, a GPS antenna/Beidou antenna is integrated in a hollowed area, and the application of antenna modes is widened. Compared with the conventional scheme, the high-performance wearable AIS antenna provided by the invention has high flexibility and can be used for wearable equipment; the antenna impedance matching is good, the influence of human bodies and equipment on the antenna performance is avoided, and the overall performance of the search and rescue equipment is effectively improved; the antenna has small size, complete functions and can be conformal.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
Fig. 1 is a schematic side view of a high performance wearable AIS antenna provided in an embodiment of the present invention;
fig. 2 is a schematic top view of a high-performance wearable AIS antenna according to an embodiment of the present invention.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments and examples, and the advantages and various effects of the present invention will be more clearly apparent therefrom. It will be understood by those skilled in the art that these specific embodiments and examples are for the purpose of illustrating the invention and are not to be construed as limiting the invention.
Throughout the specification, unless otherwise specifically noted, terms used herein should be understood as having meanings as commonly used in the art. Accordingly, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. If there is a conflict, the present specification will control.
Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by existing methods.
As shown in fig. 1-2, in the embodiment of the present application, the present invention provides a high performance wearable AIS antenna, including:
a flexible circuit board 1 for providing a mounting surface;
a dipole antenna 2 for communication; the dipole antenna 2 is attached to the mounting surface;
the bending matching balun line 3 is used for improving the impedance matching of the dipole antenna 2; the bent matching balun line 3 is arranged around the dipole antenna 2;
the radio frequency coaxial line is used for feeding and exciting the dipole antenna 2; the radio frequency coaxial line is respectively connected with the flexible circuit board 1, the dipole antenna 2 and the bending matching balun line 3.
In this application embodiment, dipole antenna 2, bend and match balun line 3 and radio frequency coaxial line are installed on flexible circuit board 1, and flexible circuit board 1 self has the flexibility, can bend to can drive dipole antenna 2 and bend and match balun line 3 and bend together, make things convenient for human wearing. The dipole antenna 2 is used for communication, the bend matching balun wire 3 is used for improving impedance matching of the dipole antenna 2, and the radio frequency coaxial wire is used for feeding excitation of the dipole antenna 2. The bending matching balun line 3 improves the impedance matching of the dipole antenna 2, so that the influence of human bodies and equipment on AIS antenna resonance in actual use can be avoided.
In the embodiment of the application, the thickness H of the flexible circuit board satisfies the following conditions: 0.025mm ≦ H ≦ 1 mm; the dielectric constant epsilon satisfies: 2 ≦ ε ≦ 10; a loss tangent of 0.02 or less.
As shown in fig. 1-2, in the embodiment of the present application, the dipole antenna 2 includes: a first antenna radiation pole 201 and a second antenna radiation pole 202, wherein the first antenna radiation pole 201 and the second antenna radiation pole 202 are connected through the radio frequency coaxial line. The first antenna radiation pole 201 and the second antenna radiation pole 202 are connected by a radio frequency coaxial line, thereby realizing feed excitation of the dipole antenna 2.
As shown in fig. 1-2, in the embodiment of the present application, a hollowed area 4 is formed at the radiation tail end of the first antenna radiation pole 201 and/or the second antenna radiation pole 202. The hollowed area 4 can extend the equivalent capacitive reactance of the electric field transmission path and the circuit parasitics and the inductive reactance of the snake-shaped wiring parasitics, the resonance point is an AIS working frequency band, and the tail end is hollowed to have the benefits of reducing the size of the antenna and improving the working resonance. The length e and the width f of the hollowed area 4 satisfy: 2mm < e < 25mm, 1mm < f < 20 mm.
In the embodiment of the present application, as shown in fig. 1-2, a GPS antenna 5 or a beidou antenna is integrated in the hollowed area 4. The functions of the AIS antenna can be expanded by integrating the GPS antenna 5 or the Beidou FPC antenna in the hollowed area 4.
As shown in fig. 1-2, in the embodiment of the present application, the radio frequency coaxial line includes: a coaxial rf feed inner core 601 and an rf feed outer shielding layer 602, wherein the rf feed outer shielding layer 602 wraps the coaxial rf feed inner core 601, the coaxial rf feed inner core 601 is communicated with the first antenna radiation pole 201 for excitation feeding, and the rf feed outer shielding layer 602 is communicated with the second antenna radiation pole 202 for forming a loop.
As shown in fig. 1-2, in the embodiment of the present application, the bending matching balun line 3 includes: the antenna comprises a first bent matching balun arm 301, a second bent matching balun arm 302 and a bent matching balun short-circuit tail end 303, wherein the first bent matching balun arm 301 and the second bent matching balun arm 302 are parallel to each other and surround a second antenna radiation pole 202 in the dipole antenna 2, a first end of the first bent matching balun arm 301 is connected with a coaxial radio frequency feeder inner core 601 in the radio frequency coaxial line, a second end of the first bent matching balun arm is connected with a first end of the bent matching balun short-circuit tail end 303, a first end of the second bent matching balun arm 302 is connected with a radio frequency feeder outer shielding layer 602 in the radio frequency coaxial line, a second end of the second bent matching balun short-circuit tail end 303 is connected with a second end of the bent matching balun short-circuit tail end 303, and the bent matching balun short-circuit tail end 303 is in short circuit with the radio frequency feeder outer shielding layer 602.
In the embodiment of the present application, the second curved matching balun arm 302 is disposed close to the second antenna radiation pole 202, and the first curved matching balun arm 301 is located outside the second curved matching balun arm 302 and is parallel to the second curved matching balun arm 302. The first bending matching balun arm 301 and the second bending matching balun arm 302 surround the second antenna radiation pole 202, and are connected through a bending matching balun short-circuit tail end 303.
As shown in fig. 1-2, in the embodiment of the present application, the length L (L — L1+ L2+ L3+ L4 in fig. 2) of the first folded matching balun arm 301 satisfies: 300mm ≦ L ≦ 550mm, and a distance D between the second bent matching balun arm 302 and the second antenna radiating pole 202 satisfies: 1mm ≦ D ≦ 10mm, and a spacing D between the first curved matching balun arm 301 and the second curved matching balun arm 302 satisfies: 0.2mm ≦ d ≦ 5 mm.
As shown in fig. 1-2, in the embodiment of the present application, the width W of the bend matching balun line 3 satisfies: 0.05mm ≦ W ≦ 5 mm.
As shown in fig. 1-2, in the present embodiment, the length a of the flexible circuit board 1 is 260mm, and the width b thereof is 64 mm. The first antenna radiation pole 201 and the second antenna radiation pole 202 are close to the compact snake-shaped wires, so that the overall size of the AIS antenna can be reduced, and the total length of the wires is one half of the equivalent physical wavelength of the central working frequency band of the antenna. The coaxial radio frequency feeder inner core 601 is communicated with the first antenna radiation pole 201 for excitation feeding, and the radio frequency feeder outer shielding layer 602 is communicated with the second antenna radiation pole 202; the first bent matching balun arm 301 is connected to the feeding point of the first antenna radiation pole 201, and the second bent matching balun arm 302 is connected to the shielding ground point of the second antenna radiation pole 202.
According to the design, the physical simulation practical use condition of the AIS antenna is simulated, a human body wears the AIS antenna provided by the application and tests in a microwave darkroom, and the test results are as follows:
(1) within the frequency band of 154 MHz-170 MHz, the standing wave ratio of the antenna is less than 2, wherein within the frequency band of 162MHz +/-25 KHz of the central working frequency band, the standing wave ratio of the antenna is less than 1.3;
(2) in the frequency band of 154 MHz-170 MHz, the antenna gain is more than 3dBi, the effective radiation wave width of the antenna is more than 120 degrees, and the full-angle effect coverage of the practical application scene is met.
The AIS antenna has the advantages of wide working frequency band and high gain. For a conventional life jacket AIS antenna, the antenna has the defects of being influenced by human bodies and equipment in actual use, adapting to the antenna and reducing the performance. Meanwhile, the antenna is large in size and is not easy to conform to life-saving equipment. The antenna working bandwidth is expanded, the frequency deviation influence of human bodies and equipment on the antenna is avoided, the antenna is guaranteed to work in an optimal frequency band at high performance all the time, meanwhile, the tail end of the antenna radiation pole is hollowed, an electric field transmission path is effectively extended, the equivalent physical wavelength of the antenna is increased, the size of the antenna is greatly reduced, a GPS (global positioning system) line/Beidou antenna can be integrated in the hollowed area, and the AIS (antenna identification system) antenna can be used for multi-mode work.
According to the high-performance wearable AIS antenna, the dipole antenna is loaded on the flexible circuit board, and the AIS antenna can be flexibly bent, so that the antenna is convenient for a human body to wear; the bending matching balun line is designed, so that the impedance matching of the dipole antenna is improved, and the influence of human bodies and equipment on the performance of the antenna is avoided; a hollow area is formed at the radiation tail end of the antenna radiation pole, an electric field transmission path is extended, the equivalent physical wavelength of the AIS antenna is increased, and the size of the antenna is effectively reduced; meanwhile, a GPS antenna/Beidou antenna is integrated in a hollowed area, and the application of antenna modes is widened. Compared with the conventional scheme, the high-performance wearable AIS antenna provided by the invention has high flexibility and can be used for wearable equipment; the antenna impedance matching is good, the influence of human bodies and equipment on the antenna performance is avoided, and the overall performance of the search and rescue equipment is effectively improved; the antenna has small size, complete functions and can be conformal.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be 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. Also, 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 an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element. The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. 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 application. Thus, the present application 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.
In short, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A wearable AIS antenna of high performance, characterized in that includes:
a flexible circuit board for providing a mounting surface;
a dipole antenna for communication; the dipole antenna is attached to the mounting surface;
the bending matching balun line is used for improving the impedance matching of the dipole antenna; the bending matching balun line is arranged around the dipole antenna;
the radio frequency coaxial line is used for feeding and exciting the dipole antenna; the radio frequency coaxial line is respectively connected with the flexible circuit board, the dipole antenna and the bending matching balun line.
2. The high performance wearable AIS antenna of claim 1, wherein a thickness H of the flexible circuit board satisfies: 0.025mm ≦ H ≦ 1 mm; the dielectric constant epsilon satisfies: 2 ≦ ε ≦ 10; a loss tangent of 0.02 or less.
3. The high performance wearable AIS antenna of claim 1, wherein the dipole antenna comprises: first antenna radiation pole and second antenna radiation pole, first antenna radiation pole with pass through between the second antenna radiation pole the radio frequency coaxial line is connected.
4. The high performance wearable AIS antenna of claim 3 wherein a radiating tail end of the first antenna radiating pole and/or the second antenna radiating pole is formed with a hollowed out area.
5. The high performance wearable AIS antenna of claim 4 wherein a GPS antenna or Beidou antenna is integrated within the excavated region.
6. The high performance wearable AIS antenna of claims 4 or 5, wherein the length e and width f of the hollowed out area satisfy: 2mm < e < 25mm, 1mm < f < 20 mm.
7. The high performance wearable AIS antenna of claim 3, wherein the radio frequency coaxial line comprises: the coaxial radio frequency feeder comprises a coaxial radio frequency feeder inner core and a radio frequency feeder outer shielding layer, wherein the radio frequency feeder outer shielding layer wraps the coaxial radio frequency feeder inner core, the coaxial radio frequency feeder inner core is communicated with the first antenna radiation pole to carry out excitation feeding, and the radio frequency feeder outer shielding layer is communicated with the second antenna radiation pole to form a loop.
8. The high performance wearable AIS antenna of claim 1, wherein the bent matching balun line comprises: the antenna comprises a first bending matching balun arm, a second bending matching balun arm and a bending matching balun short-circuit tail end, wherein the first bending matching balun arm and the second bending matching balun arm are parallel to each other and surround a second antenna radiation pole in the dipole antenna, a first end of the first bending matching balun arm is connected with a coaxial radio frequency feeder inner core in the radio frequency coaxial line, a second end of the first bending matching balun arm is connected with a first end of the bending matching balun short-circuit tail end, a first end of the second bending matching balun arm is connected with a radio frequency feeder outer shielding layer in the radio frequency coaxial line, a second end of the second bending matching balun arm is connected with a second end of the bending matching balun short-circuit tail end, and the bending matching balun short-circuit tail end is in short circuit with the radio frequency feeder outer shielding layer.
9. The high performance wearable AIS antenna of claim 8, wherein a length L of the first folded matching balun arm satisfies: 300mm ≦ L ≦ 550mm, and a distance D between the second bent matching balun arm and the second antenna radiating pole satisfies: 1mm < D < 10mm, and the distance D between the first and second curved matching balun arms satisfies: 0.2mm ≦ d ≦ 5 mm.
10. The high-performance wearable AIS antenna according to claim 1 or 8, wherein the width W of the bent matching balun line satisfies: 0.05mm ≦ W ≦ 5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011442437.2A CN112688054B (en) | 2020-12-08 | High-performance wearable AIS antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011442437.2A CN112688054B (en) | 2020-12-08 | High-performance wearable AIS antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112688054A true CN112688054A (en) | 2021-04-20 |
| CN112688054B CN112688054B (en) | 2024-05-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114421121A (en) * | 2022-03-30 | 2022-04-29 | 陕西海积信息科技有限公司 | Wearable antenna |
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|---|---|---|---|---|
| CN101065882A (en) * | 2004-09-24 | 2007-10-31 | 贾斯特有限公司 | Planar antenna for mobile satellite applications |
| JP2008153854A (en) * | 2006-12-15 | 2008-07-03 | Toppan Forms Co Ltd | Dipole antenna |
| CN103646277A (en) * | 2013-12-03 | 2014-03-19 | 北京中电华大电子设计有限责任公司 | Self-similar structure broadband radio frequency identification tag |
| CN106133747A (en) * | 2013-10-13 | 2016-11-16 | 麦拉普斯有限责任公司 | wearable motion timing label assembly |
| US20170018843A1 (en) * | 2015-07-17 | 2017-01-19 | Ohio State Innovation Foundation | Stretchable and flexible electronics and methods of making and using the same |
| CN211578981U (en) * | 2020-02-12 | 2020-09-25 | 普联技术有限公司 | Dipole printed antenna and electronic device |
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101065882A (en) * | 2004-09-24 | 2007-10-31 | 贾斯特有限公司 | Planar antenna for mobile satellite applications |
| JP2008153854A (en) * | 2006-12-15 | 2008-07-03 | Toppan Forms Co Ltd | Dipole antenna |
| CN106133747A (en) * | 2013-10-13 | 2016-11-16 | 麦拉普斯有限责任公司 | wearable motion timing label assembly |
| CN103646277A (en) * | 2013-12-03 | 2014-03-19 | 北京中电华大电子设计有限责任公司 | Self-similar structure broadband radio frequency identification tag |
| US20170018843A1 (en) * | 2015-07-17 | 2017-01-19 | Ohio State Innovation Foundation | Stretchable and flexible electronics and methods of making and using the same |
| CN211578981U (en) * | 2020-02-12 | 2020-09-25 | 普联技术有限公司 | Dipole printed antenna and electronic device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114421121A (en) * | 2022-03-30 | 2022-04-29 | 陕西海积信息科技有限公司 | Wearable antenna |
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