CN104882668A - Miniature circular polarized antenna - Google Patents
Miniature circular polarized antenna Download PDFInfo
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- CN104882668A CN104882668A CN201510218239.0A CN201510218239A CN104882668A CN 104882668 A CN104882668 A CN 104882668A CN 201510218239 A CN201510218239 A CN 201510218239A CN 104882668 A CN104882668 A CN 104882668A
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Abstract
The invention relates to a miniature circular polarized antenna, which includes a radiator, a radiation unit and a power dividing feed network. The radiator is shaped like a cuboid, and the radiation unit clings to the surface of the cuboid. The bottom of the power dividing feed network is provided with connector probes. The bottom of the radiation unit is an h-shaped bottom or an h-shaped bottom that turns left and right. The h-shaped structure corresponds to a left-turning circular polarized antenna, and the h-shaped structure that turns left and right corresponds to a right-turning circular polarized antenna. Two bottom pins of the h-shaped body are equipped with a feeding point and a short circuit point respectively, wherein the feeding point is connected to the input end of a first transformation circuit, and the short circuit point is connected to the ground. The advantages of the antenna are that through adoption of a four-arm structure, the antenna is greatly reduced in size compared with a conventional antenna, so the antenna can be better popularized for and applied to miniature wireless devices; with increases of the sides and the height of the square of the antenna, the antenna is also increased in gain; and a circular polarized axial ratio of the antenna is lower than that of the conventional antenna, and also the axial ratio bandwidth is wide.
Description
Technical field
The present invention relates to communication and navigation field, be specifically related to a kind of small-sized circular polarized antenna.
Background technology
In recent years, along with the communication technology is towards Large Copacity, broadband, multi-functional development, the miniaturization of antenna, broadband, high efficiency, high-gain are had higher requirement, and become an important research direction.Be applied to the antenna form of multimodal satellite navigation based on microstrip antenna.Due to the plurality of advantages of microstrip antenna, the extensive attention of the person that receives Antenna Operation in recent years and further investigation.The feeding network of microstrip antenna, the design comparison of radiating element are flexible, be convenient to realize circular polarization radiation, and it are low to have processing cost, are applicable to the advantages such as batch production.
The circular polarized antenna that existing communication and navigation field uses is substantially all microstrip structure, adopts the dielectric material of high-k to reduce the physical dimension of antenna.But adopt the dielectric material of high-k also to have limitation, when dielectric constant reaches more than 20, the consistency of material cannot be protected, and is also limited to reducing of antenna volume; Loss simultaneously due to high dielectric constant material is comparatively large, and the radiation efficiency of antenna is very low.
Summary of the invention
The present invention, for overcoming deficiency of the prior art, provides the small-sized circular polarized antenna that a kind of volume is little, loss is low, radiation efficiency is high.
For achieving the above object, the invention discloses following technical scheme:
A kind of small-sized circular polarized antenna, comprise radiant body, radiating element and merit divide feeding network, described radiant body is cross section is foursquare cuboid, cuboid surface is glued with the identical radiating element of four sides circuit structure, described merit is divided feeding network to comprise merit and is divided phase shifter, first pcb board, second pcb board and the 3rd pcb board, first pcb board is provided with merit and divides phase-shift network to the translation circuit of radiant body, second pcb board and the 3rd pcb board are provided with jointly the translation circuit that input to merit divides phase-shift network, the top of the first pcb board connects radiating element, bottom connects merit and divides phase shifter, merit divides phase shifter to connect the second pcb board, second pcb board connects the 3rd pcb board, connector probe is provided with bottom 3rd pcb board, it is " h " shape of " h " shape or left and right upset bottom radiating element, the corresponding left-hand circular polarization antenna of " h " shape structure, the corresponding right-handed circular polarization antenna of " h " shape structure of left and right upset, two footing of " h " shape are respectively equipped with distributing point and short dot, distributing point connects the input of the first translation circuit, short dot ground connection.
Further, described radiant body is made up of the LDS laser plastic of low-k.
Further, described cuboid is hollow-core construction.
Further, described cuboid is provided with top cover.
Further, described cuboid is solid construction.
Further, other structures in described radiating element except " h " shape that " h " shape or left and right overturn are straight line, curve or broken line form, and every surface radiation unit is only arranged in the one side of cuboid.
Further, other structures in described radiating element except " h " shape that " h " shape or left and right overturn are straight line, curve or broken line form, and every surface radiation unit extends on other adjacent faces.
Further, the described foursquare length of side be greater than 1mm and be less than maximum can processing dimension.
Further, described merit is divided to be arranged with outside phase shifter and is enclosed frame for anti-offset medium.
Further, described medium encloses frame is non-conductive material.
A kind of small-sized circular polarized antenna disclosed by the invention, has following beneficial effect:
1. owing to adopting four arm configurations, antenna volume of the present invention significantly reduces compared with the antenna of traditional type, is more conducive to the promotion and application of this antenna in miniaturized wireless device.
2., along with the increase of the antenna square shape length of side, antenna gain also can increase;
3., along with the increase of the rectangular height of antenna, antenna gain also can increase;
4. comparatively conventional aerial is low for the Circular polarization ratio of antenna, and axial ratio bandwidth is also wider simultaneously;
5. four port constant amplitude feeds, each port is phase shift 90 ° successively, makes antenna in radiative process, synthesize the good circularly polarised wave of axial ratio.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of left-hand circular polarization of the present invention;
Fig. 2 is the schematic diagram of right-handed circular polarization of the present invention;
Fig. 3 is exploded perspective view of the present invention;
Fig. 4 is the schematic diagram of short dot and distributing point;
Fig. 5 is connection diagram of the present invention;
Fig. 6 is the antenna assumption diagram of embodiment 1;
Fig. 7 is the gain pattern of embodiment 1 when 1268MHz;
Fig. 8 is the gain pattern of embodiment 1 when 1256MHz;
Fig. 9 is the gain pattern of embodiment 1 when 1277MHz;
Figure 10 is the axial ratio curve merging figure of embodiment 1 when broadband 1256-1277MHz;
Figure 11 is the antenna assumption diagram of embodiment 2;
Figure 12 is the gain pattern of embodiment 2 when 1555MHz;
Figure 13 is the gain pattern of embodiment 2 when 1560MHz;
Figure 14 is the gain pattern of embodiment 2 when 1566MHz;
Figure 15 is the gain pattern of embodiment 2 when 1575MHz;
Figure 16 is the axial ratio curve chart of embodiment 2 at broadband 1555-1575MHz;
Figure 17 is the antenna assumption diagram of embodiment 3;
Figure 18 is the gain pattern of embodiment 3 when 1606MHz;
Figure 19 is the gain pattern of embodiment 3 when 1612MHz;
Figure 20 is the gain pattern of embodiment 3 when 1615MHz;
Figure 21 is the gain pattern of embodiment 3 when 1621MHz;
Figure 22 is the axial ratio curve chart of embodiment 3 at broadband 1606-1621MHz;
Figure 23 is the antenna assumption diagram of embodiment 4;
Figure 24 is the gain pattern of embodiment 4 when 2485MHz;
Figure 25 is the gain pattern of embodiment 4 when 2490MHz;
Figure 26 is the gain pattern of embodiment 4 when 2495MHz;
Figure 27 is the axial ratio curve chart of embodiment 4 at broadband 2485-2495MHz;
Wherein:
1-radiant body 2-radiating element
3-merit divides feeding network 21-short dot
22-distributing point 31-first pcb board
32-second pcb board 33-the 3rd pcb board
34-merit divides phase shifter
Embodiment
Below in conjunction with embodiment, also with reference to accompanying drawing, the invention will be further described.
Refer to Fig. 3 and Fig. 5, Fig. 3 is exploded perspective view of the present invention, and Fig. 5 is connection diagram of the present invention.A kind of small-sized circular polarized antenna of the present invention, comprises radiant body 1, radiating element 2 and merit and divides feeding network 3.Described radiant body 1 for cross section be foursquare cuboid, cuboid surface is glued with the identical radiating element 2 of four sides circuit structure.Described merit is divided feeding network 3 to comprise merit and is divided phase shifter 34, first pcb board 31, second pcb board 32 and the 3rd pcb board 33, first pcb board 31 is provided with merit and divides phase-shift network to the translation circuit of radiant body, second pcb board 32 and the 3rd pcb board 33 are provided with jointly the translation circuit that input to merit divides phase-shift network, the top of the first pcb board 31 connects radiating element 2, bottom connects merit and divides phase shifter 34, merit divides phase shifter 34 to connect the second pcb board 32, second pcb board 32 connects bottom the 3rd pcb board the 33, three pcb board 33 and is provided with connector probe.It is " h " shape (see Fig. 1 and Fig. 2) of " h " shape or left and right upset bottom radiating element 2, wherein, the corresponding left-hand circular polarization antenna of " h " shape structure, the corresponding right-handed circular polarization antenna of " h " shape of left and right upset, two footing of " h " shape are respectively equipped with distributing point 22 and short dot 21 (see Fig. 4), distributing point 22 connects the input of the first translation circuit, short dot 21 ground connection.
It should be noted that, radiant body 1 is made up of the LDS laser plastic of low-k; Cuboid is hollow-core construction or solid construction, and the cuboid of hollow-core construction both can be provided with top cover can not have top cover yet; Other structures in radiating element 2 except " h " shape that " h " shape or left and right overturn are straight line, curve or broken line form, both can often be arranged in the one side of cuboid by surface radiation unit, and also can often extend on other adjacent faces by surface radiation unit.The foursquare length of side be greater than 1mm and be less than maximum can processing dimension, preferred 10mm.Merit is divided to be arranged with outside phase shifter 34 and is enclosed frame for anti-offset medium, and it is non-conductive material that medium encloses frame.
Consider actual needs, surface emissivity unit 2 can be directly shaping at radiant body 1 surface active by LDS technology, and realized by the heavy copper electroplating technology in later stage, finally realizes the function of stereo circuit.
The physical dimension of radiant body 1 can adjust according to the change of technical indicator, the cross section length of side variable (from 1mm to maximum can the range of work), radiant body 1 alterable height, the version of radiating element 2 has diversity (requiring the various variation shapes in feed end short-circuit structure and bending a period of time), need except feed placement is relevant with operating frequency except fixing design, all the other radiant sections can carry out change design.
Embodiment 1-4 is the result that the some antennas of current field of Beidou navigation designs according to the present invention, and the applicable field of the present invention comprises the equipment of all use circular polarized antennas.
Embodiment 1
Refer to Fig. 6-Figure 10.1268MHz is an operating frequency of Beidou II navigation, the present invention is directed to Beidou II navigation design and be of a size of square length of side 10mm, right-handed circular polarization antenna designed according to this invention efficiency under this volume is high, and the volume of current portable, hand-held class equipment can be made less.Accompanying drawing is this antenna key index---the result of calculation of gain pattern and axial ratio.
Figure 7 shows that the yield value of this antenna under different angles when 1268Mhz;
Figure 8 shows that the yield value of this antenna under different angles when 1256Mhz;
Figure 9 shows that the yield value of this antenna under different angles when 1277Mhz;
Figure 10 shows that the axial ratio curve merging figure when broadband 1256-1277MHz;
As can be seen from above diagram, the right-handed circular polarization antenna axial ratio for Beidou II navigation designed by the present invention is better, efficiency is higher.
Embodiment 2
Refer to Figure 11-Figure 16.1561MHz is an operating frequency of Beidou II navigation, the present invention is directed to Beidou II navigation design and be of a size of square length of side 10mm, right-handed circular polarization antenna designed according to this invention efficiency under this volume is high, the function of gps antenna that this antenna is also compatible simultaneously.The volume of current portable, hand-held class equipment can be made less.Accompanying drawing is this antenna key index---the result of calculation of gain pattern and axial ratio.
Figure 12 shows that the yield value of this antenna under different angles when 1555Mhz;
Figure 13 shows that the yield value of this antenna under different angles when 1560Mhz;
Figure 14 shows that the yield value of this antenna under different angles when 1566Mhz;
Figure 15 shows that the yield value of this antenna under different angles when 1575Mhz;
Figure 16 shows that the axial ratio curve merging figure when broadband 1555-1277MHz;
As can be seen from above diagram, the right-handed circular polarization antenna axial ratio for Beidou II navigation designed by the present invention is better, efficiency is higher.
Embodiment 3
Refer to Figure 17-Figure 22.1616MHz is the tranmitting frequency of Big Dipper generation navigation ground equipment, the present invention is directed to Beidou II navigation design and is of a size of square length of side 10mm, and left-hand circular polarization antenna designed according to this invention efficiency under this volume is high.The volume of current portable, hand-held class equipment can be made less.Accompanying drawing is this antenna key index---the result of calculation of gain pattern and axial ratio.
Figure 18 shows that the yield value of this antenna under different angles when 1606Mhz;
Figure 19 shows that the yield value of this antenna under different angles when 1612Mhz;
Figure 20 shows that the yield value of this antenna under different angles when 1615Mhz;
Figure 21 is depicted as the yield value of this antenna under different angles when 1621Mhz;
Figure 22 is depicted as the axial ratio curve merging figure when broadband 1606-1621MHz;
As can be seen from above diagram, the transmitting left-hand circular polarization antenna axial ratio for Big Dipper generation navigation ground equipment of the present invention's design is better, efficiency is higher.
Embodiment 4
Refer to Figure 23-Figure 26.2492MHz is the receive frequency of Big Dipper generation navigation ground equipment, the present invention is directed to Beidou II navigation design and is of a size of square length of side 10mm, and dextrorotation hand circular polarization antenna efficiency under this volume designed according to this invention is high.The volume of current portable, hand-held class equipment can be made less.Accompanying drawing is this antenna key index---the result of calculation of gain pattern and axial ratio.
Figure 24 is depicted as the yield value of this antenna under different angles when 2485Mhz;
Figure 25 is depicted as the yield value of this antenna under different angles when 2490Mhz;
Figure 26 is depicted as the yield value of this antenna under different angles when 2495Mhz;
Figure 27 is depicted as the axial ratio curve merging figure when broadband 2485-2495MHz;
As can be seen from above diagram, the reception left-hand circular polarization antenna axial ratio for Big Dipper generation navigation ground equipment of the present invention's design is better, efficiency is higher.
Simulation result shows, the technical indicator of this antenna is higher, and along with the increase of the antenna square shape length of side, antenna gain also can increase, and can need to improve antenna structure to touch the mark requirement according to the design of system.
The volume of traditional antenna is approximately 35mm × 35mm × 5mm, and the antenna volume illustrated by the present invention can accomplish 10mm × 10mm × 20mm, and the antenna more of the same type than tradition reduces 68%, is more conducive in the promotion and application of this antenna in miniaturized wireless device.
The above is only the preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art; under the premise of not departing from the present invention; the some improvement can also made the present invention and supplement, these improve and supplement, also should be considered as protection scope of the present invention.
Claims (10)
1. a small-sized circular polarized antenna, it is characterized in that, comprise radiant body, radiating element and merit divide feeding network, described radiant body is cross section is foursquare cuboid, cuboid surface is glued with the identical radiating element of four sides circuit structure, described merit is divided feeding network to comprise merit and is divided phase shifter, first pcb board, second pcb board and the 3rd pcb board, first pcb board is provided with merit and divides phase-shift network to the translation circuit of radiant body, second pcb board and the 3rd pcb board are provided with jointly the translation circuit that input to merit divides phase-shift network, the top of the first pcb board connects radiating element, bottom connects merit and divides phase shifter, merit divides phase shifter to connect the second pcb board, second pcb board connects the 3rd pcb board, connector probe is provided with bottom 3rd pcb board, it is " h " shape of " h " shape or left and right upset bottom radiating element, the corresponding left-hand circular polarization antenna of " h " shape structure, the corresponding right-handed circular polarization antenna of " h " shape structure of left and right upset, two footing of " h " shape are respectively equipped with distributing point and short dot, distributing point connects the input of the first translation circuit, short dot ground connection.
2. a kind of small-sized circular polarized antenna according to claim 1, is characterized in that, described radiant body is made up of the LDS laser plastic of low-k.
3. a kind of small-sized circular polarized antenna according to claim 1, is characterized in that, described cuboid is hollow-core construction.
4. a kind of small-sized circular polarized antenna according to claim 3, is characterized in that, described cuboid is provided with top cover.
5. a kind of small-sized circular polarized antenna according to claim 1, is characterized in that, described cuboid is solid construction.
6. a kind of small-sized circular polarized antenna according to claim 1, it is characterized in that, other structures in described radiating element except " h " shape that " h " shape or left and right overturn are straight line, curve or broken line form, and every surface radiation unit is only arranged in the one side of cuboid.
7. a kind of small-sized circular polarized antenna according to claim 1, it is characterized in that, other structures in described radiating element except " h " shape that " h " shape or left and right overturn are straight line, curve or broken line form, and every surface radiation unit extends on other adjacent faces.
8. a kind of small-sized circular polarized antenna according to claim 1, is characterized in that, the described foursquare length of side be greater than 1mm and be less than maximum can processing dimension.
9. a kind of small-sized circular polarized antenna according to claim 1, is characterized in that, described merit is divided to be arranged with outside phase shifter and enclosed frame for anti-offset medium.
10. a kind of small-sized circular polarized antenna according to claim 9, is characterized in that, it is non-conductive material that described medium encloses frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510218239.0A CN104882668A (en) | 2015-04-30 | 2015-04-30 | Miniature circular polarized antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510218239.0A CN104882668A (en) | 2015-04-30 | 2015-04-30 | Miniature circular polarized antenna |
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| Publication Number | Publication Date |
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| CN104882668A true CN104882668A (en) | 2015-09-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510218239.0A Pending CN104882668A (en) | 2015-04-30 | 2015-04-30 | Miniature circular polarized antenna |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106025516A (en) * | 2016-06-16 | 2016-10-12 | 王博 | Multi-band common-caliber composite miniature cloud tower antenna |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101682120A (en) * | 2007-03-13 | 2010-03-24 | 爱特纳公司 | Structure of a square quadrifilar helical antenna |
| WO2010103264A1 (en) * | 2009-03-12 | 2010-09-16 | Sarantel Limited | A dielectrically loaded antenna |
| CN101931127A (en) * | 2009-06-23 | 2010-12-29 | 深圳富泰宏精密工业有限公司 | Antenna assembly and wireless communication device provided with same |
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2015
- 2015-04-30 CN CN201510218239.0A patent/CN104882668A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101682120A (en) * | 2007-03-13 | 2010-03-24 | 爱特纳公司 | Structure of a square quadrifilar helical antenna |
| WO2010103264A1 (en) * | 2009-03-12 | 2010-09-16 | Sarantel Limited | A dielectrically loaded antenna |
| CN101931127A (en) * | 2009-06-23 | 2010-12-29 | 深圳富泰宏精密工业有限公司 | Antenna assembly and wireless communication device provided with same |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106025516A (en) * | 2016-06-16 | 2016-10-12 | 王博 | Multi-band common-caliber composite miniature cloud tower antenna |
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Application publication date: 20150902 |
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