CN105119053A - Novel wearable antenna diversity method - Google Patents
Novel wearable antenna diversity method Download PDFInfo
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- CN105119053A CN105119053A CN201510508947.8A CN201510508947A CN105119053A CN 105119053 A CN105119053 A CN 105119053A CN 201510508947 A CN201510508947 A CN 201510508947A CN 105119053 A CN105119053 A CN 105119053A
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Abstract
The invention discloses a novel wearable antenna diversity method and belongs to the technical field of microwaves. A pair of circularly-polarized antennas with opposite rotation directions and end-on-fire wave beams is developed in the invention and is put on a human body back to back. The maximum wave beam directions of the two antennas point to the directions far from the human body. The two antennas are mutually aligned in the opposite rotation directions so as to reduce cross coupling and improve isolation. The antennas have end-on-fire wide wave beam circular polarization characteristics and radiation direction in parallel with an antenna plane, can be concealed in a plane in order to be easy to wear, and may receive multipath components from different wave directions in order to be beneficial to diversity reception. The pair of circularly-polarized antennas with opposite rotation directions achieves coaxial feeding and is easy to produce and install. Feed lines, buttons, and clothes are formed at one time. The pair of circularly-polarized antennas has characteristics of simple structure, low profile, small size, and low manufacture cost.
Description
Technical field
The present invention relates to a kind of deversity scheme of novel Wearable antenna, belong to microwave technical field.
Background technology
The research of circular polarized antenna can trace back to 1940.Because circular polarized antenna can resist the interference of rainfall, the ripple of polarization arbitrarily can be accepted, the circularly polarised wave of circular polarized antenna radiation also can be received by the antenna polarized arbitrarily, do not need complicated tracking system just can realize good coupling, thus have broad application prospects at numerous areas such as RFID, radio communication, satellite communications yet.
The fast development of wireless communication technology, the growing tension of frequency spectrum resource, makes communication system face more and more stern challenge, also proposes more and more higher requirement to antenna simultaneously.In order to capacity, improve the availability of frequency spectrum, there has been proposed polarization diversity technique.Dual circularly polarized antenna for polarization diversity system becomes one of the study hotspot in Present Domestic outside antenna field.
Growing along with wireless communication technology, the introduction of Personal Communication Technology, portable, Wearable, implantation type wireless communication system receive increasing concern.Such as, afterwards, various consumer electronics product will be implanted in clothes.In personal electric product, antenna wearable with portable unit in play extremely important role.Nowadays the wireless communication system centered by human body becomes the chief component of mobile communication system, and such system completes wireless interaction by the element that can be through with it.Research relates to military affairs, medical science, the fields such as location.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of deversity scheme of novel Wearable antenna, the method adopts two derotations with end-fire characteristic to flat circle poliarizing antenna, its wave beam derotation dorsad, two back-to-back placements of opposite hand circular polarization antenna, isolation is high, therefore the degree of correlation is low, effectively reduces the mutual coupling of antenna.Two derotations to circular polarized antenna can receive the incoming wave of polarization arbitrarily, effectively improve incoming level.
The present invention is for solving the problems of the technologies described above by the following technical solutions:
The invention provides a kind of deversity scheme of novel Wearable antenna, the flat circle poliarizing antenna of two contrary rotation directions is worn on human body both sides respectively, two antennas are aimed at mutually with contrary rotation direction, the maximum beam direction of two antennas points to outside human body respectively, two antennas have the wave beam of end-fire characteristic, and the maximum direction of wave beam is parallel to the plane at antenna place.
As further prioritization scheme of the present invention, two flat circle poliarizing antennas adopt coaxial probe feed.
As further prioritization scheme of the present invention, two flat circle poliarizing antennas adopt the anti-phase feed of constant amplitude.
As further prioritization scheme of the present invention, flat circle poliarizing antenna comprises medium substrate; The upper surface of medium substrate is provided with connected top layer galvanic couple polar arm, top layer phase shift line, and lower surface is provided with bottom galvanic couple polar arm, bottom phase shift line; Wherein, the structure of top layer galvanic couple polar arm, bottom galvanic couple polar arm and measure-alike, and arrange relative to medium substrate antisymmetry; The structure of top layer phase shift line, bottom phase shift line and measure-alike, and arrange relative to medium substrate antisymmetry; Top layer galvanic couple polar arm and bottom galvanic couple polar arm form plane electric dipole structure; A nonocclusive cuboid resonant cavity of one side is formed between the upper and lower surface of medium substrate, the non-close face of this resonant cavity is perpendicular to the surface of medium substrate, and the top and bottom in the non-close face of this resonant cavity are connected with top layer phase shift line, bottom phase shift line respectively by grading structure.
As further prioritization scheme of the present invention, flat circle poliarizing antenna comprises medium substrate; The upper surface of medium substrate is provided with the top layer anti-pode V-arrangement radiating element, top level of matched minor matters, the top layer phase transition band line that connect successively; The lower surface of medium substrate be provided with connect successively bottom anti-pode V-arrangement radiating element, bottom coupling minor matters, bottom phase transition band line; Wherein, top layer anti-pode V-arrangement radiating element has identical structure and size with bottom anti-pode V-arrangement radiating element, and arranges relative to medium substrate antisymmetry; Top level of matched minor matters and bottom mate minor matters and have identical structure and size, and arrange relative to medium substrate antisymmetry; Top layer phase transition band line has identical structure and size with bottom phase transition band line, and relative to medium substrate symmetry arrangement; A nonocclusive cuboid resonant cavity of one side is formed between the upper and lower surface of medium substrate, the non-close face of this resonant cavity is perpendicular to the surface of medium substrate, and the top and bottom in the non-close face of this resonant cavity are connected with top layer phase transition band line, bottom phase transition band line respectively by grading structure; Top layer anti-pode V-arrangement radiating element, bottom anti-pode V-arrangement radiating element form an opening symmetrical loop, and its opening direction is towards the non-close face of resonant cavity, and the projected position of opening symmetrical loop on medium substrate is not overlapping with the position of resonant cavity.
The present invention adopts above technical scheme compared with prior art, has following technique effect:
The present invention adopts two derotations with end-fire characteristic to flat circle poliarizing antenna, its wave beam derotation dorsad, and two back-to-back placements of opposite hand circular polarization antenna, can reduce mutual coupling, improves isolation; Have the characteristic of end-fire broad beam circular polarization, radiation direction is parallel to the plane at antenna place simultaneously, can plane hide, and is convenient to dress, and can receive again the multipath component of different arrival bearing and be convenient to make and install; Feeder line just and button, dress material once-forming, has the features such as structure is simple, section is low, volume is little, cost of manufacture is cheap.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the inventive method.
Wherein, 1 is left-hand face circular polarized antenna, and 2 is right-hand face circular polarized antennas.
Fig. 2 is the antenna pattern adopting HFSS software to calculate, and wherein, (a) is the xoy-plane pattern of two circular polarized antennas at 5.80GHz, and (b) is the xoz-plane pattern of two circular polarized antennas at 5.80GHz.
Fig. 3 is the directional diagram of circular polarized antenna and the inverse-F antenna adopting HFSS software to calculate.
Fig. 4 is the transmission coefficient frequency characteristic figure of circular polarized antenna, micro-strip paster antenna and the inverse-F antenna utilizing HFSS Software simulation calculation to obtain.
Embodiment
Be described below in detail embodiments of the present invention, the example of described execution mode is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the execution mode be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
Those skilled in the art of the present technique are understandable that, unless otherwise defined, all terms used herein (comprising technical term and scientific terminology) have the meaning identical with the general understanding of the those of ordinary skill in field belonging to the present invention.Should also be understood that those terms defined in such as general dictionary should be understood to have the meaning consistent with the meaning in the context of prior art, unless and define as here, can not explain by idealized or too formal implication.
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:
Contrast accompanying drawing 1, the present invention is employing a pair contrary rotation direction and has the circular polarized antenna (left-hand face circular polarized antenna 1 and right-hand face circular polarized antenna 2) of end-fire wave beam, is worn on it human body.The maximum beam direction of two antennas points to outside human body respectively.Two antennas are always aimed at mutually with contrary rotation direction; Two flat circle poliarizing antennas have the wave beam of end-fire characteristic, and the maximum direction of wave beam is parallel to the plane at antenna place, i.e. xoy face.
Described two flat circle poliarizing antennas 1 and 2 adopt coaxial probe feed; Described two flat circle poliarizing antennas 1 and 2 adopt the anti-phase feed of constant amplitude.
Described two flat circle poliarizing antennas 1 and 2 can be made up of magnetic dipole unit (namely above-mentioned resonant cavity) and loop unit, also can be made up of magnetic dipole unit and electric dipole unit, (concrete structure of flat circle poliarizing antenna repeats no more here).Broadside coupled two-wire can be adopted between two kinds of unit to connect, and the length of broadside coupled two-wire is the 1/3-1/5 of operating frequency corresponding wavelength.
Reference frame in contrast accompanying drawing 1 and (a) and (b) in accompanying drawing 2, Fig. 2 sets forth two the main working face directional diagrams (xoy-plane and xoz-plane) of two circular polarized antennas at 5.80GHz.As seen from Figure 2, in whole working frequency range, antenna has broad beam end-fire characteristic (its main beam pointing+x direction).
Reference frame in contrast accompanying drawing 1 and accompanying drawing 3, accompanying drawing 3 is circular polarized antenna and inverse-F antenna xoz-plane pattern at 5.80GHz.In figure, solid line is the directional diagram of circular polarized antenna, and chain-dotted line is the directional diagram of inverse-F antenna.The result of 3 is visible with reference to the accompanying drawings, and circular polarized antenna gain is in the direction of the x axis greater than inverse-F antenna, and the average level of circular polarized antenna is greater than the about 2.5dB of inverse-F antenna.
Contrast accompanying drawing 4, accompanying drawing 4 is the circular polarized antennas adopting a pair contrary rotation direction respectively and have end-fire wave beam, the micro-strip paster antenna of a pair polarization orthogonal and the inverse-F antenna of a pair polarization orthogonal, be worn on it human body, the transmission coefficient frequency characteristic of the circular polarized antenna, micro-strip paster antenna and the inverse-F antenna that utilize HFSS Software simulation calculation to obtain.Solid line in figure is the transmission coefficient characteristic curve of circular polarized antenna, and dotted line is the transmission coefficient characteristic curve of micro-strip paster antenna, and chain-dotted line is the transmission coefficient characteristic curve of inverse-F antenna.The result of 4 is visible with reference to the accompanying drawings, and the transmission coefficient of circular polarized antenna is lower than micro-strip paster antenna and inverse-F antenna, and namely the isolation of circular polarized antenna is higher than micro-strip paster antenna and inverse-F antenna.
In sum, adopt a pair contrary rotation direction and have the circular polarized antenna of end-fire wave beam, be worn on it human body, the maximum beam direction of two antennas points to outside human body respectively, have that isolation is high, the characteristic of end-fire broad beam circular polarization, and radiation direction is parallel to antenna plane, plane can hide, be convenient to dress, the multipath component of different arrival bearing can be received again, more favourable to diversity reception, and adopt coaxial feed, be convenient to make and install; Feeder line (namely connecting the longer coaxial line between power supply and distributing point) just can with button, dress material once-forming, there is the features such as structure is simple, section is low, volume is little, cost of manufacture is cheap.
The above; be only the embodiment in the present invention; but protection scope of the present invention is not limited thereto; any people being familiar with this technology is in the technical scope disclosed by the present invention; the conversion or replacement expected can be understood; all should be encompassed in and of the present inventionly comprise within scope, therefore, protection scope of the present invention should be as the criterion with the protection range of claims.
Claims (5)
1. the deversity scheme of a novel Wearable antenna, it is characterized in that, the flat circle poliarizing antenna of two contrary rotation directions is worn on human body both sides respectively, two antennas are aimed at mutually with contrary rotation direction, the maximum beam direction of two antennas points to outside human body respectively, two antennas have the wave beam of end-fire characteristic, and the maximum direction of wave beam is parallel to the plane at antenna place.
2. the deversity scheme of a kind of novel Wearable antenna according to claim 1, is characterized in that, two flat circle poliarizing antennas adopt coaxial probe feed.
3. the deversity scheme of a kind of novel Wearable antenna according to claim 1, is characterized in that, two flat circle poliarizing antennas adopt the anti-phase feed of constant amplitude.
4. the deversity scheme of a kind of novel Wearable antenna according to claim 1, it is characterized in that, flat circle poliarizing antenna comprises medium substrate; The upper surface of medium substrate is provided with connected top layer galvanic couple polar arm, top layer phase shift line, and lower surface is provided with bottom galvanic couple polar arm, bottom phase shift line; Wherein, the structure of top layer galvanic couple polar arm, bottom galvanic couple polar arm and measure-alike, and arrange relative to medium substrate antisymmetry; The structure of top layer phase shift line, bottom phase shift line and measure-alike, and arrange relative to medium substrate antisymmetry; Top layer galvanic couple polar arm and bottom galvanic couple polar arm form plane electric dipole structure; A nonocclusive cuboid resonant cavity of one side is formed between the upper and lower surface of medium substrate, the non-close face of this resonant cavity is perpendicular to the surface of medium substrate, and the top and bottom in the non-close face of this resonant cavity are connected with top layer phase shift line, bottom phase shift line respectively by grading structure.
5. the deversity scheme of a kind of novel Wearable antenna according to claim 1, it is characterized in that, flat circle poliarizing antenna comprises medium substrate; The upper surface of medium substrate is provided with the top layer anti-pode V-arrangement radiating element, top level of matched minor matters, the top layer phase transition band line that connect successively; The lower surface of medium substrate be provided with connect successively bottom anti-pode V-arrangement radiating element, bottom coupling minor matters, bottom phase transition band line; Wherein, top layer anti-pode V-arrangement radiating element has identical structure and size with bottom anti-pode V-arrangement radiating element, and arranges relative to medium substrate antisymmetry; Top level of matched minor matters and bottom mate minor matters and have identical structure and size, and arrange relative to medium substrate antisymmetry; Top layer phase transition band line has identical structure and size with bottom phase transition band line, and relative to medium substrate symmetry arrangement; A nonocclusive cuboid resonant cavity of one side is formed between the upper and lower surface of medium substrate, the non-close face of this resonant cavity is perpendicular to the surface of medium substrate, and the top and bottom in the non-close face of this resonant cavity are connected with top layer phase transition band line, bottom phase transition band line respectively by grading structure; Top layer anti-pode V-arrangement radiating element, bottom anti-pode V-arrangement radiating element form an opening symmetrical loop, and its opening direction is towards the non-close face of resonant cavity, and the projected position of opening symmetrical loop on medium substrate is not overlapping with the position of resonant cavity.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510508947.8A CN105119053B (en) | 2015-08-19 | 2015-08-19 | A kind of deversity scheme of new wearable antenna |
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| CN201510508947.8A CN105119053B (en) | 2015-08-19 | 2015-08-19 | A kind of deversity scheme of new wearable antenna |
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| CN105119053A true CN105119053A (en) | 2015-12-02 |
| CN105119053B CN105119053B (en) | 2018-03-09 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109326864A (en) * | 2017-08-01 | 2019-02-12 | 宏达国际电子股份有限公司 | The method that the antenna structure and folding and extension of WiGig the frequency range antenna structure can be transmitted |
| CN113067126A (en) * | 2021-03-11 | 2021-07-02 | 中国人民解放军空军通信士官学校 | Wearable short wave communication antenna |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000114848A (en) * | 1998-10-01 | 2000-04-21 | Yokowo Co Ltd | Diversity antenna |
| JP2002280828A (en) * | 2001-03-21 | 2002-09-27 | Ee C Ii Tec Kk | Antenna system |
| CN1734833A (en) * | 2004-08-09 | 2006-02-15 | 电子科技大学 | Wearable diversity antenna apparatus for wireless communication terminal |
| JP2013145961A (en) * | 2012-01-13 | 2013-07-25 | Hitachi Cable Ltd | Antenna device |
| CN104617380A (en) * | 2015-01-08 | 2015-05-13 | 南京邮电大学 | Plane aperture-symmetric ring combined antenna with circularly-polarized end emission characteristics |
-
2015
- 2015-08-19 CN CN201510508947.8A patent/CN105119053B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000114848A (en) * | 1998-10-01 | 2000-04-21 | Yokowo Co Ltd | Diversity antenna |
| JP2002280828A (en) * | 2001-03-21 | 2002-09-27 | Ee C Ii Tec Kk | Antenna system |
| CN1734833A (en) * | 2004-08-09 | 2006-02-15 | 电子科技大学 | Wearable diversity antenna apparatus for wireless communication terminal |
| JP2013145961A (en) * | 2012-01-13 | 2013-07-25 | Hitachi Cable Ltd | Antenna device |
| CN104617380A (en) * | 2015-01-08 | 2015-05-13 | 南京邮电大学 | Plane aperture-symmetric ring combined antenna with circularly-polarized end emission characteristics |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109326864A (en) * | 2017-08-01 | 2019-02-12 | 宏达国际电子股份有限公司 | The method that the antenna structure and folding and extension of WiGig the frequency range antenna structure can be transmitted |
| CN113067126A (en) * | 2021-03-11 | 2021-07-02 | 中国人民解放军空军通信士官学校 | Wearable short wave communication antenna |
| CN113067126B (en) * | 2021-03-11 | 2023-03-21 | 中国人民解放军空军通信士官学校 | Wearable short wave communication antenna |
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| CN105119053B (en) | 2018-03-09 |
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