CN204464476U - Low section high-gain broadband spiral antenna with circular polarization - Google Patents
Low section high-gain broadband spiral antenna with circular polarization Download PDFInfo
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- CN204464476U CN204464476U CN201520208719.4U CN201520208719U CN204464476U CN 204464476 U CN204464476 U CN 204464476U CN 201520208719 U CN201520208719 U CN 201520208719U CN 204464476 U CN204464476 U CN 204464476U
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- spiral
- circular polarization
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- low section
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Abstract
The utility model discloses a kind of low section high-gain broadband spiral antenna with circular polarization, for solving the problem that existing spiral antenna with circular polarization section is high and gain is low.Comprise base plate (1), radiant body (2), feeding network (5), the first feeding coaxial lines (6) and the second feeding coaxial lines (7); Two radiant bodies (2) are made up of open column shape dielectric-slab (3) and the spiral radiation unit (4) that is wound on its outer surface, are fixed on base plate (1) side by side; The number of turns of spiral radiation unit (4) more than three circles, its helical angle 85 °≤α <90 °, the initiating terminal position difference 90 degree in a circumferential direction of two spiral radiation unit (4), and around to identical; Two feeding networks (5) all adopt micro-band transition line structure, and orthogonal thereto arrangement; The length of the first feeding coaxial lines (6) is less than the second feeding coaxial lines (7).The utility model has the advantage that section is low and gain is high, can be widely used in radio communication.
Description
Technical field
The utility model belongs to antenna technical field, relates to a kind of low section high-gain broadband spiral antenna with circular polarization, can be widely used in radio communication.
Background technology
The antenna of circular polarization characteristics common are axial mode helical antenna, microstrip antenna, four arms or the form such as eight arm helical antennas and flat helical antenna.Wherein, helical antenna due to structure simple, radiation efficiency is high and be widely used in the communications field, and its mode of operation is divided into normal direction mould spiral and two kinds, axial mode spiral.As ratio D/ λ < 0.18 with wavelength of the diameter of spiral, the greatest irradiation direction of antenna is at horizontal plane and produce line polarization wave.When spiral with wavelength than D/ λ=0.25 ~ 0.46 (namely one enclose spiral girth be about a wavelength) time, antenna has greatest irradiation in the axial direction, now choose suitable spiral angle and be generally greater than 12 °, antenna will produce circularly polarised wave at axis direction.When needs produce high-gain circular polarization radiation, increase the number of turns of axial mode spiral, generally enclose more than 6 to improve gain, or axial mode helical antenna is carried out the design of group battle array, no matter use which kind of scheme, due to by the restriction of pitch, it is very low that the height of antenna all can not become, and is not suitable for the Miniature Terminal of wireless communication system.
Microstrip antenna has low section characteristic, is carried out group battle array and can realize high-gain circular polarization radiation, but the circular polarization bandwidth of microstrip antenna itself is narrower, and radiation efficiency is not high yet, and thus the scope of application is also subject to certain restrictions.
Four arms or eight arm helical antennas need the feeding network by design is comparatively complicated to realize circular polarization usually, and the gain of the antenna of this form is also lower simultaneously, generally at below 5dBi.
Flat helical antenna has the feature of broadband, broad beam and low section, but because its gain is generally at below 7dBi, and due to feeder line and radiant body difficulty of matching comparatively greatly, thus can not meet the needs of more users.
Multi-form circular polarized antenna respectively has superiority, but there is the defect self being difficult to overcome simultaneously.In order to improve the combination property of antenna, the research staff of recent domestic has done various trial, as Chinese patent grant number CN 103943954 A, name is called " a kind of ultra broadband low section printed form spiral antenna with circular polarization ", its structure as shown in Figure 1, this invention comprises radiant body and base plate, radiant body is made up of open column shape dielectric-slab and printing helical metal band on its outer surface, the width of this helical metal band is 10mm ~ 40mm, the number of turns is 1.0 ~ 1.5, spiral angle is 20 ° ~ 30 °, this invention significantly reduces antenna section, but due to the wider width of helical metal band, helical angle can not reduce further, namely section can not reduce further, and due to the number of turns few, the gain of this antenna is lower.
Utility model content
The purpose of this utility model is the defect solving the existence of above-mentioned prior art, proposes a kind of low section high-gain broadband spiral antenna with circular polarization, to solve the problem that existing printed form spiral antenna with circular polarization section is higher and gain is lower.
For achieving the above object, the utility model takes following technical scheme:
A kind of low section high-gain broadband spiral antenna with circular polarization, comprise radiant body and base plate, described radiant body is fixed on base plate; Described radiant body comprises two radiant bodies 2 be fixed on side by side on base plate 1, distance L=0.4 λ therebetween
0~ 0.65 λ
0, λ
0for the free space wavelength of center of antenna frequency; This radiant body 2 is by open column shape dielectric-slab 3 and form at the spiral radiation unit 4 of its outer surface around the home, and the spiral number of turns of described spiral radiation unit 4 is enclosed more than three, helical angle 85 °≤α <90 °; The initiating terminal position difference 90 degree in a circumferential direction of two spiral radiation unit 4; Two feeding networks 5 all adopt micro-band transition line structure, and orthogonal thereto arrangement, its output is connected with the initiating terminal of two spiral radiation unit 4 respectively, and for realizing Broadband Matching, input is connected with the inner core of the first coaxial feeder 6 with the second coaxial feeder 7 respectively; The length of the first coaxial feeder 6 is less than the second coaxial feeder 7, for realizing circular polarization.
Above-mentioned low section high-gain broadband spiral antenna with circular polarization, described open column shape dielectric-slab 3 adopts FR4 material, its outer diameter D=0.25 λ
0~ 0.4 λ
0.
Above-mentioned low section high-gain broadband spiral antenna with circular polarization, described spiral radiation unit 4 adopts enamel covered wire, and the spiral number of turns is set to 3 ~ 5 circles.
Above-mentioned low section high-gain broadband spiral antenna with circular polarization, described base plate 1 is made up of the medium substrate of FR4 material, the feeding network 5 being printed on its upper and lower surface and metal patch.
Above-mentioned low section high-gain broadband spiral antenna with circular polarization, described feeding network 5 transition length is 1/4 λ
0.
Above-mentioned low section high-gain broadband spiral antenna with circular polarization, the length of described two coaxial feeders 6 and 7 is respectively L
1and L
2, L
2-L
1=1/4 λ
0, in order to produce the phase of 90 °.
Compared with prior art, tool has the following advantages the utility model:
1, the utility model is owing to have employed larger helical angle, namely very little pitch, makes helical length reduce like this, realizes low section.
2, the utility model is owing to adopting less pitch, make element antenna radiation polarized wave, by two orthogonal placements of element antenna, composition binary arrays, two the quadrature linear polarization ripples produced are at space combination circularly polarised wave, simultaneously because the number of turns of pitch I coiling increases, thus the gain of antenna is greatly improved.
3, utility model works is in 1526-1659MHz, and its feeding network is made up of gradual change microstrip line, achieves the Broadband Matching of coaxial feeder and antenna radiation unit.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of existing helical antenna;
Fig. 2 is overall structure schematic diagram of the present utility model;
Fig. 3 is the structural representation of spiral radiation body of the present utility model;
Fig. 4 is base plate vertical view of the present utility model;
Fig. 5 is the standing-wave ratio measured result figure of the utility model embodiment 1;
Fig. 6 is the axial ratio measured result figure of the utility model embodiment 1;
Fig. 7 is the XOZ surface radiation directional diagram of the utility model embodiment 1.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is further described:
Embodiment 1
With reference to Fig. 2, radiant body comprises two radiant bodies 2 be fixed on side by side on base plate 1, and the specification of these two radiant bodies 2 is identical, and its central axis, perpendicular to the cross section of base plate 1, is fixed by screw and base plate 1 and formed binary arrays, distance L=114mm between the two; The initiating terminal of two spiral radiation unit 4 position difference 90 degree in a circumferential direction, and around to identical, two quadrature linear polarization ripples of generation are circularly polarised wave at space combination; The feeding network 5 of two orthogonal thereto arrangements is printed with at the upper surface of Rectangular Enclosure with Participating Media substrate, these two feeding networks 5 all adopt micro-band transition line structure, its output welds with the initiating terminal of two spiral radiation unit 4 respectively, for realizing Broadband Matching, the input of feeding network 5 welds respectively with through the first coaxial feeder 6 of through wires hole on base plate 1 and the inner core of the second coaxial feeder 7, the metal patch that the lower surface of Rectangular Enclosure with Participating Media substrate is printed welds with the outer core of the first coaxial feeder 6 and the second coaxial feeder 7, the length L of the first coaxial feeder 6
1=15mm, the length L of the second coaxial feeder 7
2=45mm, so just can ensure that the two differs 90 ° in phase place, thus achieve right-handed circular polarization radiation.
With reference to Fig. 3, radiant body 2 is made up of open column shape dielectric-slab 3 and coiling spiral radiation unit 4 on its outer surface; Open column shape dielectric-slab 3 adopts FR4 material, outer diameter D=62mm, and height G=36mm, thickness P=3mm, be carved with helicla flute at its outer surface, spiral radiation unit 4 is embedded in helicla flute.Spiral radiation unit 4 adopts diameter to be the enamel covered wire of 1.5mm, and be wound on open column shape dielectric-slab 3 with α=87 °, the number of turns is 3.5 circles.
With reference to Fig. 4, base plate 1 is made up of the Rectangular Enclosure with Participating Media substrate of FR4 material, the feeding network 5 being printed on its upper and lower surface and metal patch, the length L of medium substrate
3=208mm, width W
1=99mm, thickness H=2mm; Adopt the form of micro-band transition line, wherein broadside portion width W=3.5mm, length L
4=32mm, transition line part overall length L
5=22mm, width can adjust, and the width like this by changing transition line can adjust gradual change form to realize the impedance matching of coaxial feeder and radiating element.
Embodiment 2
The structure of embodiment 2 is identical with the structure of embodiment 1, and following parameter makes an adjustment:
Spiral radiation body pitch angle alpha will=86 °, the outer diameter D=60mm of open column shape dielectric-slab 3, the distance L=108mm between two radiant bodies 2, feeding network 5 broadside portion width W=3.5mm, length L
4=25mm, transition line part overall length L
5=17mm, width can adjust.
Embodiment 3
The structure of embodiment 3 is identical with the structure of embodiment 1, and following parameter makes an adjustment:
Spiral radiation body pitch angle alpha will=85 °, the outer diameter D=64mm of open column shape dielectric-slab 3, the distance L=112mm between two radiant bodies 2, feeding network 5 broadside portion width W=3.5mm, length L
4=25mm, transition line part overall length L
5=17mm, width can adjust.
Below in conjunction with test result, effect of the present utility model is further described:
With reference to Fig. 5, utilize Agilent 8753ES to test standing wave of the present utility model at microwave dark room, be less than 2 for standard with standing-wave ratio, at utility model works frequency range 1526-1659MHz scope standing internal wave than all below 2.
With reference to Fig. 6, test half space Circular polarization ratio of the present utility model at microwave dark room, be less than 3dB for standard with axial ratio, within the scope of utility model works frequency range 1526-1659MHz, axial ratio is all at below 3dB.
With reference to Fig. 7, measure radiate pattern of the present utility model at Airlink 3D microwave dark room, measured result can be found out, within the scope of utility model works frequency range 1526-1659MHz, directional diagram is regular, and back lobe is very little, and radiance is good, principal direction gain can reach 14dBi, achieves high-gain.
Above measured result illustrates, the utility model antenna has broadband, high-gain and circular polarization characteristics.
Claims (6)
1. a low section high-gain broadband spiral antenna with circular polarization, comprise radiant body and base plate, described radiant body is fixed on base plate; It is characterized in that, described radiant body comprises two radiant bodies (2) be fixed on side by side on base plate (1), distance L=0.4 λ therebetween
0~ 0.65 λ
0, λ
0for the free space wavelength of center of antenna frequency; This radiant body (2) is made up of open column shape dielectric-slab (3) and the spiral radiation unit (4) that is wound on its outer surface, the spiral number of turns of described spiral radiation unit (4) is enclosed more than three, helical angle 85 °≤α <90 °; The initiating terminal position difference 90 degree in a circumferential direction of two spiral radiation unit (4); Two feeding networks (5) all adopt micro-band transition line structure, and orthogonal thereto arrangement, its output is connected with the initiating terminal of two spiral radiation unit (4) respectively, for realizing Broadband Matching, input is connected with the inner core of the first coaxial feeder (6) with the second coaxial feeder (7) respectively; The length of the first coaxial feeder (6) is less than the second coaxial feeder (7), for realizing circular polarization.
2. low section high-gain broadband spiral antenna with circular polarization according to claim 1, is characterized in that, described open column shape dielectric-slab (3) adopts FR4 material, its outer diameter D=0.25 λ
0~ 0.4 λ
0.
3. low section high-gain broadband spiral antenna with circular polarization according to claim 1, is characterized in that, described spiral radiation unit (4) adopts enamel covered wire, and the spiral number of turns is set to 3 ~ 5 circles.
4. low section high-gain broadband spiral antenna with circular polarization according to claim 1, it is characterized in that, described base plate (1) is made up of the medium substrate of FR4 material, the feeding network (5) being printed on its upper and lower surface and metal patch.
5. low section high-gain broadband spiral antenna with circular polarization according to claim 4, it is characterized in that, described feeding network (5) transition length is 1/4 λ
0.
6. low section high-gain broadband spiral antenna with circular polarization according to claim 1, is characterized in that: the length of described two coaxial feeders (6,7) is respectively L
1and L
2, L
2-L
1=1/4 λ
0, in order to produce the phase of 90 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520208719.4U CN204464476U (en) | 2015-04-08 | 2015-04-08 | Low section high-gain broadband spiral antenna with circular polarization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520208719.4U CN204464476U (en) | 2015-04-08 | 2015-04-08 | Low section high-gain broadband spiral antenna with circular polarization |
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|---|---|
| CN204464476U true CN204464476U (en) | 2015-07-08 |
Family
ID=53671312
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|---|---|---|---|
| CN201520208719.4U Expired - Fee Related CN204464476U (en) | 2015-04-08 | 2015-04-08 | Low section high-gain broadband spiral antenna with circular polarization |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105633573A (en) * | 2016-01-05 | 2016-06-01 | 上海海积信息科技股份有限公司 | Navigation positioning antenna |
| CN107394381A (en) * | 2017-07-18 | 2017-11-24 | 东南大学 | A kind of broadband circle polarized array antenna of low section using stacking travelling-wave aerial unit |
| CN107732404A (en) * | 2017-08-31 | 2018-02-23 | 西安空间无线电技术研究所 | A kind of integrated dual spiral antenna |
| CN109037917A (en) * | 2018-07-23 | 2018-12-18 | 南京华讯方舟通信设备有限公司 | Helical antenna with coupled structure |
| CN111641031A (en) * | 2020-06-11 | 2020-09-08 | 陕西烽火诺信科技有限公司 | High-power wide-beam circularly polarized antenna with lightning protection function |
| CN112385082A (en) * | 2018-06-20 | 2021-02-19 | 电装国际美国公司 | Circular polarized quadrifilar helix antenna |
| CN113224514A (en) * | 2021-07-07 | 2021-08-06 | 中国人民解放军海军工程大学 | Sea surface towing antenna and parameter confirmation device |
| CN116315621A (en) * | 2023-05-25 | 2023-06-23 | 湖南中电星河电子有限公司 | Navigation enhancement type four-arm spiral antenna |
-
2015
- 2015-04-08 CN CN201520208719.4U patent/CN204464476U/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105633573A (en) * | 2016-01-05 | 2016-06-01 | 上海海积信息科技股份有限公司 | Navigation positioning antenna |
| CN105633573B (en) * | 2016-01-05 | 2020-10-27 | 上海海积信息科技股份有限公司 | Navigation positioning antenna |
| US11069965B2 (en) | 2017-07-18 | 2021-07-20 | Southeast University | Low-profile broadband circularly-polarized array antenna using stacked traveling wave antenna elements |
| CN107394381A (en) * | 2017-07-18 | 2017-11-24 | 东南大学 | A kind of broadband circle polarized array antenna of low section using stacking travelling-wave aerial unit |
| CN107394381B (en) * | 2017-07-18 | 2019-11-12 | 东南大学 | A kind of broadband circle polarized array antenna of low section using stacking travelling-wave aerial unit |
| CN107732404A (en) * | 2017-08-31 | 2018-02-23 | 西安空间无线电技术研究所 | A kind of integrated dual spiral antenna |
| CN112385082B (en) * | 2018-06-20 | 2024-02-27 | 电装国际美国公司 | Circular polarized quadrifilar helix antenna |
| CN112385082A (en) * | 2018-06-20 | 2021-02-19 | 电装国际美国公司 | Circular polarized quadrifilar helix antenna |
| CN109037917A (en) * | 2018-07-23 | 2018-12-18 | 南京华讯方舟通信设备有限公司 | Helical antenna with coupled structure |
| CN111641031A (en) * | 2020-06-11 | 2020-09-08 | 陕西烽火诺信科技有限公司 | High-power wide-beam circularly polarized antenna with lightning protection function |
| CN113224514A (en) * | 2021-07-07 | 2021-08-06 | 中国人民解放军海军工程大学 | Sea surface towing antenna and parameter confirmation device |
| CN113224514B (en) * | 2021-07-07 | 2021-09-14 | 中国人民解放军海军工程大学 | Sea surface towing antenna and parameter confirmation device |
| CN116315621A (en) * | 2023-05-25 | 2023-06-23 | 湖南中电星河电子有限公司 | Navigation enhancement type four-arm spiral antenna |
| CN116315621B (en) * | 2023-05-25 | 2023-07-21 | 湖南中电星河电子有限公司 | Navigation enhancement type four-arm spiral antenna |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150708 Termination date: 20160408 |
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| CF01 | Termination of patent right due to non-payment of annual fee |