CN104201475A - Loop antenna - Google Patents
Loop antenna Download PDFInfo
- Publication number
- CN104201475A CN104201475A CN201410492109.1A CN201410492109A CN104201475A CN 104201475 A CN104201475 A CN 104201475A CN 201410492109 A CN201410492109 A CN 201410492109A CN 104201475 A CN104201475 A CN 104201475A
- Authority
- CN
- China
- Prior art keywords
- support arm
- feeder line
- antenna
- loop
- degree
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Details Of Aerials (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention provides a loop antenna comprising a feeder and an antenna body. The feeder comprises an anode and a cathode. The antenna body comprises a plurality of antenna units in a loop structure. The antenna units are symmetrically distributed around the feeder. The antenna units are connected with the anode and the cathode respectively. The loop antenna has the advantages that the frequency characteristics and directional characteristics of small-loop antenna are inherited, the antenna units are arranged on a solid face according to angles, and impedance is changed and reduced by array characteristics, thus directionality, impedance and gaining of the small-loop antenna are improved, low impedance and guaranteed directionality are comprehensively achieved, the gaining rarely greatly decreases, the impedance problem of the small-loop antenna is solved, and efficiency is remarkably improved.
Description
Technical field
The present invention relates to antenna technical field, relate in particular to the loop aerial for passive communication.
Background technology
Antenna, as a kind of parts that are used for launching or receiving radio wave, plays the important and pivotal role in wireless communication system, is indispensable part in wireless communication system.Along with high frequency satellite communication system, radar, wireless communication system, the develop rapidly of especially global 3G and 4G networking, also more and more higher to the requirement of antenna.On the one hand, need to make antenna can be operated in a plurality of frequency bands, there is multiple-working mode and there is good transmission performance; On the other hand, alleviate again the weight of antenna, reduce antenna volume and reduce costs.Just because of such demand, all kinds of antennas are suggested and obtain flourish.
Loop antenna is mainly divided into two classes, and a class is the total length of conductor and the maximum linear dimension of ring one circle with respect to operation wavelength very little small loop antenna all; Another kind of is that the total length of conductor and the size of ring all have the loop antenna of suitable comparativity with operation wavelength.Because the relation of wavelength, antenna has very large volume often.Large loop antenna also wants the conductor of a wavelength or 1/2nd wavelength to form conventionally, and general group formation is square, circular etc.The conductor total length of small loop antenna can be less than 1/10th wavelength.Although greatly reduce on small loop antenna volume, its impedance is very large, and gain reduces violent, and communication is extremely restricted, and is not substantially suitable for passive communication.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of loop aerial, and the impedance of small loop antenna is reduced as much as possible, improves directivity and the impedance gain of small loop antenna, makes gain be difficult for acutely reducing.
A kind of loop aerial provided by the invention, comprise feeder line and antenna body, described feeder line is provided with feeder line positive pole and feeder line negative pole, wherein, described antenna body comprises the antenna element of some structures ringwise, described some antenna elements are symmetrically distributed in the surrounding of described feeder line around described feeder line, described each antenna element is connected with feeder line negative pole with described feeder line is anodal respectively.
Further, the quantity of described antenna element is three, and the angle theta between adjacent two antenna elements is 120 degree.
Further, the quantity of described antenna element is four, and the angle theta between adjacent two antenna elements is 90 degree.
Further, at least one the 3rd support arm that described antenna element comprises the first support arm, the second support arm and connects described the first support arm and the second support arm, described the first support arm is connected with described feeder line is anodal, and described the second support arm is connected with described feeder line negative pole.
Further, described the 3rd support arm is circular-arc, and it is fan-shaped surrounding with described the first support arm, the second support arm the loop configuration forming, and the angle ɑ of the first support arm and the second support arm is between 75 degree to 85 degree.
Preferably, described angle ɑ is 80 degree.
Further, described the first support arm, the second support arm and at least one the 3rd support arm surround the loop configuration forming be triangle, rhombus or square in a kind of.
Further, the angle β of described the first support arm and feeder line axis is between 15 degree to 21 degree.
Preferably, described angle β is 18 degree.
Further, described several antenna elements are positioned at same level height.
Further, described feeder line is anodal coaxial with described feeder line negative pole, and feeder line positive pole is positioned at the inside of described feeder line, and the anodal outside of feeder line is provided with feeder line negative pole.
Beneficial effect of the present invention: a kind of loop aerial provided by the invention, frequency characteristic and the directional characteristic of small loop antenna have been inherited, annular element is arranged by angle at a three-dimensional surface simultaneously, utilize the impedance of array characteristic changing, thereby improve directivity and the impedance gain of small loop antenna, reach the omnidirectional's effect that reduces impedance, guarantor tropism, make gain be difficult for acutely reducing, overcome the impedance problems of small loop antenna, greatly improved efficiency.
Accompanying drawing explanation
Fig. 1 is the front view of embodiment of the present invention loop aerial structure.
Fig. 2 is the upward view of embodiment of the present invention loop aerial structure.
Fig. 3 is the loop aerial antenna pattern that simulation calculation goes out when 1.5GHz of the embodiment of the present invention.
Embodiment
In order to set forth better technical characterstic of the present invention and structure, below in conjunction with the preferred embodiments of the present invention and accompanying drawing thereof, be described in detail.
Consult Fig. 1 and Fig. 2, loop aerial provided by the invention comprises feeder line 100 and antenna body 200, wherein, feeder line 110 is provided with feeder line anodal 110 and feeder line negative pole 120, feeder line anodal 110 is coaxial with feeder line negative pole 120, feeder line positive pole 110 is positioned at the inside of feeder line 100, and feeder line negative pole 120 is the outer medium that makes a circle of parcel feeder line positive pole 110, forms feeder line 100 with feeder line anodal 110.Antenna body 200 comprises the antenna element 210 of some structures ringwise, described some antenna elements 210 are symmetrically distributed in the surrounding of described feeder line 100 around described feeder line 100, wherein, each antenna element 210 is connected with feeder line negative pole 120 with described feeder line anodal 110 respectively, and all antenna elements 210 are positioned at same level height.
Particularly, the response of frequency is had any different considering antenna element 210 sizes, along with increasing of number of rings (quantity of antenna element 210), frequency will increase, selecting in the present embodiment antenna element 210 is three, wherein, angle theta between each antenna element 210 is 120 degree, the total length of each antenna element 210 is about quarter-wave, annular vertical array is on antenna body, the radiating surface that makes integrated antenna is no longer unidirectional axial plane, and whole horizontal plane, as yz plane in Fig. 2.In other embodiments, the quantity of antenna element 210 can be chosen as more, for example, be chosen as 4, and now the angle theta between each antenna element 210 is 90 degree.
Wherein, each antenna element 210 is loop configuration, this kind of loop configuration at least comprises the first support arm 211, the second support arm 212 and at least one the 3rd support arm 213 that connects described the first support arm 211 and the second support arm 212, described the first support arm 211 is connected with described feeder line anodal 110, and described the second support arm 212 is connected with described feeder line negative pole 120.In the present embodiment, as shown in Figure 1, the antenna element 210 of loop configuration comprises the first support arm 211, the second support arm 212 and the 3rd support arm 213 that connects described the first support arm 211 and the second support arm 212, the 3rd support arm 213 is circular-arc, it is fan-shaped surrounding with the first support arm 211, the second support arm 212 loop configuration forming, the angle ɑ of the first support arm 211 and the second support arm 212 is 80 degree, and in some other embodiment, angle ɑ can be chosen between 75 degree to 85 degree.In other embodiments, the 3rd support arm 213 can be other shapes, and its quantity can be set to more, for example: the 3rd support arm 213 is linearity, quantity is 1, and the loop configuration that now the 3rd support arm 213 and the first support arm 211, the second support arm 212 surround formation is triangle; Or the 3rd support arm 213 is linearity, quantity is 2, and now to surround the loop configuration forming be rhombus or square for 2 the 3rd support arms 213 and the first support arm 211, the second support arm 212.Above lifted example just carry out in version preferably, should not be considered as the restriction to specific constructive form.
Wherein, the first support arm 211 with anodal 110 antenna elements that are connected 210 of feeder line, the first support arm 211 between each antenna element 210 can not be overlapped, interfere, be to need to there is gap between the first support arm 211 of each antenna element 210, the angle β of the first support arm and feeder line axis is between 15 degree to 21 degree, and preferably this angle β is 18 degree in the present embodiment.The second straight line 212 of antenna element 210 is connected with feeder line negative pole 120, and feeder line negative pole 120 is for ground connection.
The loop aerial that above embodiment provides, has inherited frequency characteristic and the directional characteristic of small loop antenna; Simultaneously, antenna element is pressed to certain angle permutation and combination at a three-dimensional surface, utilize the impedance of array characteristic changing, thereby improve directivity and the impedance gain of small loop antenna, reach the omnidirectional's effect that reduces impedance, guarantor tropism, make gain be difficult for acutely reducing, overcome the impedance problems of small loop antenna, greatly improved efficiency.
Fig. 3 adopts loop aerial that the method for simulation calculation provides above embodiment to carry out the diagram of Numerical Validation, this loop aerial is when frequency 1.5GHz, can reach-6dBi of gain, half-power angle reaches more than 100 °, this loop aerial directivity maintenance simultaneously omnidirectional is described, overcome the impedance problems of small loop antenna, greatly improved efficiency.
It should be noted that, in this article, the relational terms such as the first and second grades is only used for an entity and another entity to make a distinction, and not necessarily requires or imply relation or the order that has any reality between these entities.
The above embodiment of the present invention is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make on the basis of the above description other multi-form variation or changes.Here exhaustive without also giving all execution modes.All any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in the protection range of the claims in the present invention.
Claims (11)
1. a loop aerial, comprise feeder line (100) and antenna body (200), described feeder line (100) is provided with feeder line positive pole (110) and feeder line negative pole (120), it is characterized in that, described antenna body (200) comprises the antenna element (210) of some structures ringwise, described some antenna elements (210) are symmetrically distributed in the surrounding of described feeder line (100) around described feeder line (100), described each antenna element (210) is connected with feeder line negative pole (120) with described feeder line anodal (110) respectively.
2. loop aerial according to claim 1, is characterized in that, the quantity of described antenna element (210) is three, and the angle theta between adjacent two antenna elements (210) is 120 degree.
3. loop aerial according to claim 1, is characterized in that, the quantity of described antenna element (210) is four, and the angle theta between adjacent two antenna elements (210) is 90 degree.
4. according to arbitrary described loop aerial in claims 1 to 3, it is characterized in that, described antenna element (210) comprises the first support arm (211), the second support arm (212) and connects described the first support arm (212) and at least one the 3rd support arm (213) of the second support arm (212), described the first support arm (211) is connected with described feeder line anodal (110), and described the second support arm (212) is connected with described feeder line negative pole (120).
5. loop aerial according to claim 4, it is characterized in that, described the 3rd support arm (213) is circular-arc, it is fan-shaped surrounding with described the first support arm (211), the second support arm (212) loop configuration forming, and the angle α of the first support arm (211) and the second support arm (212) is between 75 degree to 85 degree.
6. loop aerial according to claim 5, is characterized in that, described angle α is 80 degree.
7. loop aerial according to claim 4, is characterized in that, described the first support arm (211), the second support arm (212) and at least one the 3rd support arm (213) surround the loop configuration forming be triangle, rhombus or square in a kind of.
8. loop aerial according to claim 4, is characterized in that, the angle β of described the first support arm (211) and feeder line (100) axis is between 15 degree to 21 degree.
9. loop aerial according to claim 8, is characterized in that, described angle β is 18 degree.
10. loop aerial according to claim 1, is characterized in that, described several antenna elements (210) are positioned at same level height.
11. loop aerials according to claim 1, it is characterized in that, described feeder line anodal (110) is coaxial with described feeder line negative pole (120), feeder line anodal (110) is positioned at the inside of described feeder line (100), and anodal (110) outside of feeder line is provided with feeder line negative pole (120).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410492109.1A CN104201475B (en) | 2014-09-23 | 2014-09-23 | A kind of loop aerial |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410492109.1A CN104201475B (en) | 2014-09-23 | 2014-09-23 | A kind of loop aerial |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104201475A true CN104201475A (en) | 2014-12-10 |
| CN104201475B CN104201475B (en) | 2018-04-10 |
Family
ID=52086731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410492109.1A Active CN104201475B (en) | 2014-09-23 | 2014-09-23 | A kind of loop aerial |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104201475B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6255998B1 (en) * | 2000-03-30 | 2001-07-03 | James Stanley Podger | Lemniscate antenna element |
| JP2004072432A (en) * | 2002-08-06 | 2004-03-04 | Furukawa Electric Co Ltd:The | Antenna unit, antenna device, and broadcast tower |
| CN1773771A (en) * | 2005-10-21 | 2006-05-17 | 兰州大学 | Orthogonal ring antenna |
| CN204103044U (en) * | 2014-09-23 | 2015-01-14 | 中国科学院深圳先进技术研究院 | A kind of loop aerial |
-
2014
- 2014-09-23 CN CN201410492109.1A patent/CN104201475B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6255998B1 (en) * | 2000-03-30 | 2001-07-03 | James Stanley Podger | Lemniscate antenna element |
| JP2004072432A (en) * | 2002-08-06 | 2004-03-04 | Furukawa Electric Co Ltd:The | Antenna unit, antenna device, and broadcast tower |
| CN1773771A (en) * | 2005-10-21 | 2006-05-17 | 兰州大学 | Orthogonal ring antenna |
| CN204103044U (en) * | 2014-09-23 | 2015-01-14 | 中国科学院深圳先进技术研究院 | A kind of loop aerial |
Non-Patent Citations (1)
| Title |
|---|
| CARL E.BAUM: "Symmetry in Low-Impedance Magnetic Antennas", 《ELECTROMAGNETICS IN ADVANCED APPLICATIONS，2007》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104201475B (en) | 2018-04-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107863996B (en) | Omnidirectional array antenna and beam forming method thereof | |
| EP2631991B1 (en) | Microstrip antenna | |
| US20170346191A1 (en) | Dipole antenna with beamforming ring | |
| CN102110878B (en) | Broadband multi-frequency monopole antenna | |
| CN106299689B (en) | A kind of ultra wide band low section vertical depolarized omnidirectional antenna | |
| CN104037504B (en) | A kind of trumpet type low section wide band high-gain antenna | |
| CN207475549U (en) | omni-directional array antenna | |
| CN107732465A (en) | A kind of Dual-band dual-polarization quickly falls rectangle transmission distance antenna | |
| CN105098345B (en) | A kind of broadband reflection array antenna using double resonance phase-shift unit | |
| US10396471B2 (en) | Three polarization MIMO antenna system | |
| CN105680171A (en) | Omnidirectional ceiling antenna with broadband polarized wave-trapping characteristics | |
| WO2019100376A1 (en) | Omnidirectional array antenna and beamforming method therefor | |
| CN105186137A (en) | Multi-resonant structure based single-feed anti-multipath adaptive antenna | |
| CN204205058U (en) | The double-deck double frequency round polarized antenna of four feedbacks of center short circuit | |
| CN103390791B (en) | A kind of dual-band antenna that can be used for human body communication system | |
| CN204103044U (en) | A kind of loop aerial | |
| CN102904064A (en) | Antenna | |
| CN103337714A (en) | Dielectric resonant antenna array based on electromagnetic band-gap material | |
| CN103311656A (en) | Antenna device | |
| CN107464992B (en) | Ultra-wideband high-gain omnidirectional antenna | |
| CN103354306B (en) | Novel S-wave-band high-gain omnidirectional array antenna | |
| CN104201475A (en) | Loop antenna | |
| JP2017092663A (en) | Broadband non-directional antenna | |
| CN202034481U (en) | Super medium intelligent loaded antenna | |
| CN204205042U (en) | The double-deck double frequency round polarized antenna of four feedbacks |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |