CN202772257U - Dual-frequency antenna for human communication system - Google Patents
Dual-frequency antenna for human communication system Download PDFInfo
- Publication number
- CN202772257U CN202772257U CN2012202051220U CN201220205122U CN202772257U CN 202772257 U CN202772257 U CN 202772257U CN 2012202051220 U CN2012202051220 U CN 2012202051220U CN 201220205122 U CN201220205122 U CN 201220205122U CN 202772257 U CN202772257 U CN 202772257U
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- China
- Prior art keywords
- dual
- communication system
- human body
- ring
- band antenna
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Abstract
The utility model belongs to the technical field of communication antenna, and discloses a dual-frequency antenna for a human communication system. The dual-frequency antenna comprises a dielectric substrate (1), a circular patch (2), a round patch (3), a ground floor (4), and a short circuit pin (5). The probe is used to feed, thus the antenna has a simple structure, low profile and simultaneously realizes radiation pattern functions respectively in omnidirectional and unidirectional ways.
Description
Technical field
The utility model relates to the communication antenna field, relates in particular to a kind of dual-band antenna that can be used for human body communication system.
Background technology
In recent years, human body communication system is subject to extensive concern.In human body communication system, all terminal equipments lay respectively at surface or the inside of human body of human body.In order can effectively to work, above-mentioned terminal must be set up three kinds of communication links simultaneously: the communication link of the link between human body surface and Exterior Communications System, the communication link between human body surface, human body surface and inside of human body.Therefore, above-mentioned three kinds of communication links just need to have the antenna pattern that function with it adapts.The antenna pattern that just need to have unidirectional (vertical with human body surface and outwards) such as, human body surface and link between Exterior Communications System; Communication link between human body surface then needs along the antenna pattern of human body surface omnidirectional.Terminal equipment can realize simultaneously that above-mentioned antenna pattern is desirable just, but at present less to the research of this respect.
The utility model content
Technical problem: the technical problems to be solved in the utility model provides a kind of simple in structure, has low section, and can realize simultaneously the antenna of the antenna pattern function of omnidirectional and unidirectional two kinds of forms.
Technical scheme: the utility model proposes the dual-band antenna that can be used for human body communication system, by dielectric substrate, the ring-type paster, circular patch, ground plate, shorting pin forms, adopt fed by coaxial probe, circular patch is arranged in the semi-open chamber of ring-type paster, ground plate, shorting pin formation.
It is that 1/2, rb is 1/4 of design work wavelength that the internal diameter ra of ring-type paster satisfies ra/rb with the ratio of external diameter rb.
Shorting pin (5) is positioned on the ring circumference of ring-type paster, and is and is equally spaced, and makes ring-type paster and ground plate short circuit.
Beneficial effect: compare with the existing Monopole class of omnidirectional radiation directional diagram or its deformed aerial realized, the dual-band antenna of realizing human body communication system of the present utility model, longitudinal size only has the former 1/20; Secondly, circular patch is arranged in the semi-open chamber of ring-type paster, ground plate, shorting pin formation so that structure is compacter; Moreover because the existence of shorting pin so that the isolation between the two-port improve.Thereby the utility model satisfies the requirement of human body communication system by encouraging different patterns can realize simultaneously the antenna pattern function of omnidirectional and unidirectional two kinds of forms.
Description of drawings
Fig. 1 is the end view of the general structure of the dual-band antenna that is used for human body communication system that provides of the utility model;
Fig. 2 is the top view of the general structure of the dual-band antenna that is used for human body communication system that provides of the utility model;
Fig. 3 is that the dual-band antenna that is used for human body communication system that provides of the utility model is at design frequency f
1The upper elevation radiation patytern of=2.4GHz;
Fig. 4 is that the dual-band antenna that is used for human body communication system that provides of the utility model is at design frequency f
1=2.4GHz upper horizontal plane directional diagram;
Fig. 5 is that the dual-band antenna that is used for human body communication system that provides of the utility model is at design frequency f
2The upper elevation radiation patytern of=5.8GHz;
Fig. 6 is the two-port return loss plot of the dual-band antenna that is used for human body communication system that provides of the utility model;
Fig. 7 is the two-port isolation view of the dual-band antenna that is used for human body communication system that provides of the utility model;
Have among the above figure: medium substrate 1, annular paster 2, circular patch 3, ground plate 4, shorting pin 5.R wherein
a, r
bBe respectively the interior outer radius of annular paster, r
pBe the radius of circular patch, f
x, f
yBe respectively the distance at two distributing points and center.
Embodiment
Below with reference to accompanying drawings the utility model is described.
The utility model provides a kind of dual-band antenna that has omnidirectional and directed radiation directional diagram when can be used for human body communication system, by dielectric substrate 1, ring-type paster 2, circular patch 3, ground plate 4, shorting pin 5 forms.Adopt probe feed;
Wherein, the circular patch at center is arranged in the semi-open chamber of ring-type paster, ground plate, shorting pin formation.The inside and outside radius ratio of ring-type paster meets some requirements r
a/ r
bBe about 1/2, r
bBe about 1/4 of design work wavelength.Shorting pin is positioned on the ring circumference of ring-type paster, and is and is equally spaced, and makes ring-type paster and ground plate short circuit.Referring to Fig. 1 and Fig. 2
Referring to Fig. 3～Fig. 7 for the utility model provide can be used for human body communication system the performance curve of dual-band antenna.Fig. 3-Fig. 5 is respectively for the dual-band antenna of human body communication system E face and the H face directional diagram in two centre frequencies of design; Fig. 6, Fig. 7 for be used for human body communication system return loss and the isolation of dual-band antenna two-port; Above-mentioned curve draws under above-mentioned specified criteria, if the curve that change structure parameter etc. also can be similarly.The curve negotiating computer simulation emulation obtains, and available simulation software is just like the HFSS of Ansoft company, the high frequency simulation softwares such as Microwave Studio CST of CST company.
But the utility model continuation is contained: when the polarization of electromagnetic wave of feed radiation is oriented to left/right circular polarization, namely realize having the human body communication system dual-band antenna of circular polarization by choosing suitable distributing point.Secondly, when choosing wearable braid as dielectric substrate, above-mentioned parameter appropriately adjusts and gets final product.
Be convenient to illustrate the design process of each structural parameters, below the statement based on given structural parameters, but this and be without loss of generality.Given parameters: the thickness t=1.5mm of dielectric substrate, the inside and outside radius r of ring-type paster
a=17.5mm, r
b=35mm.Two distributing points and center apart from f
x=3.5mm, f
y=26.5mm.Two central task frequency f
1=2.4GHz, f
2=5.8GHz.
The above only is better embodiment of the present utility model; protection range of the present utility model is not limited with above-mentioned execution mode; as long as the equivalence that those of ordinary skills do according to the utility model institute disclosure is modified or changed, all should include in the protection range of putting down in writing in claims.
Claims (3)
1. dual-band antenna that can be used for human body communication system, it is characterized in that: by dielectric substrate (1), ring-type paster (2), circular patch (3), ground plate (4), shorting pin (5) forms, and adopts fed by coaxial probe, and circular patch (3) is arranged in the semi-open chamber of ring-type paster (2), ground plate (4), shorting pin (5) formation.
2. the dual-band antenna that can be used for human body communication system according to claim 1, it is characterized in that: it is that 1/2, rb is 1/4 of design work wavelength that the internal diameter ra of ring-type paster satisfies ra/rb with the ratio of external diameter rb.
3. the dual-band antenna that can be used for human body communication system according to claim 1, it is characterized in that: shorting pin (5) is positioned on the ring circumference of ring-type paster (2), and is and is equally spaced, and makes ring-type paster (2) and ground plate (4) short circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202051220U CN202772257U (en) | 2012-05-09 | 2012-05-09 | Dual-frequency antenna for human communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202051220U CN202772257U (en) | 2012-05-09 | 2012-05-09 | Dual-frequency antenna for human communication system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202772257U true CN202772257U (en) | 2013-03-06 |
Family
ID=47778807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012202051220U Expired - Lifetime CN202772257U (en) | 2012-05-09 | 2012-05-09 | Dual-frequency antenna for human communication system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202772257U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103390791A (en) * | 2012-05-09 | 2013-11-13 | 中博信息技术研究院有限公司 | Double-band antenna for human body communication system |
| CN103594786A (en) * | 2013-10-30 | 2014-02-19 | 航天恒星科技有限公司 | Miniaturization spiral PIFA antenna with UHF band |
-
2012
- 2012-05-09 CN CN2012202051220U patent/CN202772257U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103390791A (en) * | 2012-05-09 | 2013-11-13 | 中博信息技术研究院有限公司 | Double-band antenna for human body communication system |
| CN103390791B (en) * | 2012-05-09 | 2016-03-30 | 中博信息技术研究院有限公司 | A kind of dual-band antenna that can be used for human body communication system |
| CN103594786A (en) * | 2013-10-30 | 2014-02-19 | 航天恒星科技有限公司 | Miniaturization spiral PIFA antenna with UHF band |
| CN103594786B (en) * | 2013-10-30 | 2017-05-10 | 航天恒星科技有限公司 | Miniaturization spiral PIFA antenna with UHF band |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130306 |