CN101170216A - High gain dipole antenna - Google Patents
High gain dipole antenna Download PDFInfo
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- CN101170216A CN101170216A CNA2006101176020A CN200610117602A CN101170216A CN 101170216 A CN101170216 A CN 101170216A CN A2006101176020 A CNA2006101176020 A CN A2006101176020A CN 200610117602 A CN200610117602 A CN 200610117602A CN 101170216 A CN101170216 A CN 101170216A
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Abstract
A high gain double antenna suitable for the band of wireless local area network 3.5GHz band (3400-3600MHz) comprises a radiation metal sleeve, a medium base plate, a ground metal wire, a ground surface, a matching circuit, a radiation metal wire, a connection metal wire, as well as a feed-in coaxial transmission line. The radiation metal wire is successively comprises a first sub-metal wire, a second sub-metal wire and a third sub-metal wire. The length of the first sub-metal wire approximately is 1/4 wavelength of the antenna center operating frequency, the length of the second sub-metal wire approximately is 1/2 wavelength of the antenna center operating frequency, the second sub-metal wire is provided with buckles more than three times, and the two end points thereof are electrically connected with the first and the third sub-metal wires separately. The length of the third sub-metal wire approximately is 1/2 wavelength of the antenna center operating frequency.
Description
Technical field
The present invention system particularly is applied to the high gain dipole antenna on the radio communication product about a kind of dipole antenna (dipole antenna).
Background technology
Along with the fast development of wireless telecommunications industry in recent years, the demand of various radio communication product on function also promotes gradually.And on WLAN is used, the service range when increasing its communication has high-gain and isotropic bridge contact Antenna Design is also increasingly important.Simultaneously, in order to reduce cost of manufacture, also must consider and simplify its structure and manufacture method.
The known antenna that is applied to the WLAN bridge contact mostly is based on dipole antenna and unipole antenna at present.Fig. 1 shows known dipole antenna, and wherein: radiation metal wires 13 is connected with the center conductor 141 of feed-in coaxial transmission line 14, is the positive end parts of dipole antenna; And hollow metal sleeve 12 is connected in layer earthing conductor 142 outside this feed-in coaxial transmission line, is dipole antenna negative terminal part.This dipole antenna has the radiation field shape of omni-directional, but the only about 2dBi of its gain.Again, No. the 529th, 783, TaiWan, China patent discloses a kind of Improvement type planar dipole antenna about " dipole antenna design ", and it has centre frequency and the stable characteristic of frequency range, but the gain of gain of this antenna and general known dipole antenna there is no too big difference.In the present invention, we propose a kind of design with high gain dipole antenna, but this antenna not only planographic on medium substrate, use and reduce cost, and it is simple in structure, and have characteristics such as omni-directional and high-gain, be the innovative design that has the industry using value.
Summary of the invention
The object of the present invention is to provide a kind of high gain dipole antenna of novelty, its gain can reach about 4.4dBi, and antenna structure is simple, can be formed on the medium substrate with circuit printing or etching technique easily.
This antenna comprises: radiation metal sleeve, medium substrate, grounded metal line, ground plane, match circuit, radiation metal wires, and feed-in coaxial transmission line.The shape of radiation metal sleeve is roughly the hollow cylinder that an end has opening, and comprises a sealing surface relative with this opening, and this sealing surface is provided with a perforate.Medium substrate has a first surface and a second surface, and one of this medium substrate end passes the perforate on this sealing surface of this radiation metal sleeve, and the other end then extends towards the direction away from this radiation metal sleeve.The grounded metal line is positioned at the first surface and the radiation metal sleeve inner of medium substrate, and one of grounded metal line end points has an earth point.Ground plane is positioned at the perforate on the sealing surface of the first surface of this medium substrate and contiguous radiation metal sleeve, and ground plane also is connected to the verge of opening of radiation metal sleeve.Match circuit is positioned at the first surface of medium substrate, and has an input and an output.Radiation metal wires is positioned at the first surface of medium substrate, mainly comprise: the first sub-metal wire, has first end points and with respect to second end points of this first end points, wherein first end points is connected to the output of match circuit, second end points then extends towards the direction away from this radiation metal sleeve, and the length that makes the interest of winning belong to line is roughly 1/4 wavelength of this center of antenna frequency of operation; The second sub-metal wire, have starting point and terminal point, this starting point is roughly 1/2 wavelength of this center of antenna frequency of operation to the length of this terminal point, and has the bending more than 3 times between this starting point and this terminal point, make this second interest belong to line and form a circuitous bending shape that this starting point also is connected to this second end points of this first sub-metal wire; The 3rd sub-metal wire, length are roughly 1/2 wavelength of this antenna operation frequency, and the bearing of trend of its bearing of trend and this first sub-metal wire is roughly the same, and one of the 3rd sub-metal wire end points also is connected to the terminal point of this second sub-metal wire.Connect metal wire and have initiating terminal and end, this initiating terminal is positioned at the perforate on the sealing surface of this radiation metal sleeve, should then be connected with the input of this match circuit by end.The feed-in coaxial transmission line is positioned at this radiation metal sleeve, in order to transmission signal, comprises: a center conductor is connected to the initiating terminal of this connection metal wire; And outer earthing conductor, be connected to this ground plane, and on this skin earthing conductor, have one and be connected with the earth point of this grounded metal line apart from the position of about center frequency of operation 1/4 wavelength of this perforate.
In this design, we can be by the length of the first sub-metal wire of adjusting this radiation metal wires respectively, the second sub-metal wire and the 3rd sub-metal wire, make its 1/4,1/2,1/2 wavelength near the center frequency of operation of this antenna, make its this first sub-metal wire and the 3rd sub-metal wire have the electric current of equidirectional, and with the current opposite in direction of this second sub-metal wire.Simultaneously,, form a circuitous bending shape, can suppress reverse current on this second sub-metal wire effectively the influence of entire antenna omni-directional radiation field shape via with this second sub-metal wire bending.So, the synthetic radiation of the electric current in the same way on this first sub-metal wire and the 3rd sub-metal wire can be so that the design's gain reaches about 4.4dBi.And by the length of adjusting this radiation metal wires and the length and the width of this radiation metal sleeve, frequency of heart is to the necessary operations frequency band among this antenna of may command.And, can make the present invention's antenna obtain better impedance and impedance frequency range by the live width of this first sub-metal wire of adjusting this match circuit and this radiation metal wires.And, can suppress the influence of leakage current of this feed-in coaxial transmission line effectively by the center frequency of operation 1/4 wavelength balancer (balun) that this grounded metal line is formed, and obtain good omni-directional radiation field shape.By last characteristic, can design the antenna that is applicable to WLAN 3.5GHz frequency band operation.
Description of drawings
Fig. 1 is the stereogram of known dipole antenna.
Fig. 2 a is the stereogram of preferred embodiment antenna of the present invention.
Fig. 2 b is the explosive view of preferred embodiment antenna of the present invention.
Fig. 2 c is the I part partial enlarged drawing of the 2b figure of preferred embodiment antenna of the present invention.
Fig. 3 returns the loss measurement result for preferred embodiment antenna of the present invention.
Fig. 4 is the radiation field shape measurement result of preferred embodiment antenna of the present invention.
Fig. 5 is the gain measurement result of preferred embodiment antenna of the present invention.
Embodiment
Fig. 2 a～2c shows the present invention's preferred embodiment respectively, and wherein antenna 2 comprises: radiation metal sleeve 20, medium substrate 21, grounded metal line 22, ground plane 23, match circuit 24, radiation metal wires 25, connection metal wire 26 and feed-in coaxial transmission line 27.Radiation metal sleeve 20 is just as inverted cup, and its shape is roughly the hollow cylinder that an end has opening, and comprises the sealing surface relative with this opening 201, and has perforate 202 in 201 of this sealings.Medium substrate 21 has first surface 211 and second surface 212, and 201 the last perforates 202 of sealing of passing this radiation metal sleeve 20 of one of medium substrate 21 end, and the other end is then towards the direction extension away from this radiation metal sleeve 20.Grounded metal line 22 is positioned at the first surface 211 and the contiguous radiation metal sleeve 20 of medium substrate 21, and one of grounded metal line 22 end has an earth point 221.Ground plane 23 is positioned at the perforate 202 on the sealing surface 201 of the first surface 211 of medium substrate 21 and contiguous radiation metal sleeves 20, and ground plane 23 also is connected to perforate 202 edges of radiation metal sleeve 20.Match circuit 24 is positioned at the first surface 211 of medium substrate 21, and has input 241 and output 242.Match circuit is to be used for the impedance of balancing antenna inside, the L shaped match circuit that its configuration can constitute for the T shape match circuit that is made of 3 electronic building bricks or π shape match circuit or by 2 electronic building bricks or by two L shaped match circuit (not shown) that 4 electronic building bricks constitute depends on the circumstances.Radiation metal wires 25 is positioned at the first surface 211 of medium substrate 21, mainly comprises: first sub-metal wire 251, the second sub-metal wire 252, and the 3rd sub-metal wire 253.The first sub-metal wire 251 has second end points 253 that first end points 252 reaches with respect to first end points 252, wherein first end points 252 is connected to this output 242 of this match circuit 24, second end points 253 then extends towards the direction away from this radiation metal sleeve 20, and its length is roughly 1/4 wavelength of center of antenna frequency of operation.The second sub-metal wire 254 has starting point 255 and terminal point 256, starting point 255 256 length to terminal is roughly 1/2 wavelength of this center of antenna frequency of operation, and has the bending more than 3 times between starting point 255 and the terminal point 256, make the second sub-metal wire 254 form a circuitous bending shape, starting point 255 also is connected to second end points 253 of the first sub-metal wire 251.The length of the 3rd sub-metal wire 257 is roughly 1/2 wavelength of antenna operation frequency, and roughly the same with the bearing of trend of the first sub-metal wire 251, and one of the 3rd sub-metal wire 257 end points also is connected to second interest and belongs to 254 terminal point 256.Connect metal wire 26 and have initiating terminal 261 and terminal 262, initiating terminal 261 is positioned at the perforate 202 on the sealing surface 201 of radiation metal sleeve 20, and terminal 262 then are connected with the input 241 of match circuit 24.Feed-in coaxial transmission line 27 is positioned at radiation metal sleeve 20 inside, in order to transmission signal, comprises: center conductor 271 and outer earthing conductor 272.Center conductor 271 is connected to the initiating terminal 261 that connects metal wire 26.Outer earthing conductor 272 is connected to ground plane 23, and the position apart from these perforate 202 about center frequency of operation 1/4 wavelength has a contact that is connected with the earth point 221 of grounded metal line 22 on outer earthing conductor 271.Grounded metal line 22, ground plane 23, match circuit 24 and radiation metal wires 25 can be formed on the same medium substrate 21 by circuit printing or etching technique.
Fig. 3 show preferred embodiment of the present invention antenna 2 return loss experimental measurement result, the test parameter that we select is:
1. the radiation metal sleeve 20, and length is about 17mm, radius is about 2.5mm;
2. the first sub-metal wire 251, length is about 17mm, width is about 2.3mm;
3. the second sub-metal wire 254, length is about 35mm, width is about 0.3mm, and has about 12 bendings;
4. the 3rd sub-metal wire 255, length is about 34.5mm, width is about 0.76mm;
5. dielectric coefficient is 4.4 glass substrate.
By the gained experimental result, return at 10dB under the definition of loss, the impedance frequency range of its antenna operation mode reaches 200MHz, can contain WLAN (3400-3600MHz) operational frequency bands.
Fig. 4 is the radiation field of aerial shape measurement of the antenna 2 of preferred embodiment of the present invention in 3500MHz.By the gained experimental result, antenna has the field shape of an omnidirectional radiation in the x-y plane, and gain can reach 4.3dBi.
Fig. 5 is the antenna 2 gain measurements of preferred embodiment of the present invention.By the gained experimental result, the antenna gain in the operation mode is about 4.2 ~ 4.4dBi, can satisfy the gain requirements of general 3.5GHz WLAN operation.
Comprehensive above-mentioned explanation, antenna of the present invention simple in structure, cost of manufacture is low, definite functions, so antenna of the present invention very has a high industrial using value, is enough to meet the category of invention.
The embodiment that is narrated only is the principle and the effect thereof of explanation apparatus of the present invention in the above description, and unrestricted the present invention.
Claims (3)
1. a dipole antenna is characterized in that, comprising:
One radiation metal sleeve, it is shaped as the hollow cylinder that an end has opening, and comprise one with described opening
The sealing surface that mouth is relative, described sealing surface is provided with a perforate;
One medium substrate has a first surface and a second surface, and one of described medium substrate end passes
Perforate on the sealing surface of described radiation metal sleeve, the other end are then extended towards the direction away from described radiation metal sleeve;
One grounded metal line is positioned at the first surface and the described radiation metal sleeve of described medium substrate, connects
One end of ground metal wire has an earth point;
One ground plane is positioned at the perforate on the sealing surface of the first surface of described medium substrate and contiguous described radiation metal sleeve, and ground plane also is connected to the verge of opening of described radiation metal sleeve;
One match circuit is positioned at the first surface of described medium substrate, and has an input and an output;
One radiation metal wires is positioned at the first surface of described medium substrate, mainly comprises:
One first sub-metal wire has one first end points and second end points with respect to this first end points, and wherein this first end points is connected to the output of described match circuit, and its length is about 1/4 wavelength of this center of antenna frequency of operation;
One second sub-metal wire, have an a starting point and a terminal point, this starting point length to terminal is about 1/2 wavelength of this center of antenna frequency of operation, and has the bending more than 3 times between this starting point and the terminal point, and this starting point also is connected to second end points of the described first sub-metal wire; And
One the 3rd sub-metal wire, length are about 1/2 wavelength of this center of antenna frequency of operation, and its bearing of trend is identical with the bearing of trend of the described first sub-metal wire, and an end points of the 3rd sub-metal wire also is connected to the terminal point of the described second sub-metal wire;
One connects metal wire, has an initiating terminal and an end, and this initiating terminal is positioned at the perforate central authorities on the sealing surface of described radiation metal sleeve approximately, terminal then be connected with the input of described match circuit; And
One feed-in coaxial transmission line is positioned at this radiation metal sleeve inner, comprises:
One center conductor is connected to the initiating terminal of described connection metal wire; And
One outer earthing conductor is connected to described ground plane, and the position that is about 1/4 wavelength of this antenna operation frequency apart from this perforate on this skin earthing conductor is connected with this earth point of this grounded metal line.
2. dipole antenna as claimed in claim 1 is characterized in that, described grounded metal line, described ground plane and described radiation metal linear system are formed on the same medium substrate with circuit printing or etching technique.
3. dipole antenna as claimed in claim 1 is characterized in that, has 1 time bending between the described grounded metal line, makes described grounded metal line form L shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101176020A CN101170216B (en) | 2006-10-26 | 2006-10-26 | High gain dipole antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101176020A CN101170216B (en) | 2006-10-26 | 2006-10-26 | High gain dipole antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101170216A true CN101170216A (en) | 2008-04-30 |
| CN101170216B CN101170216B (en) | 2011-06-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006101176020A Expired - Fee Related CN101170216B (en) | 2006-10-26 | 2006-10-26 | High gain dipole antenna |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012065420A1 (en) * | 2010-11-16 | 2012-05-24 | 广东盛路通信科技股份有限公司 | Combined small diameter omni-directional antenna with dual-frequency |
| CN110571510A (en) * | 2019-08-28 | 2019-12-13 | 陕西烽火诺信科技有限公司 | Helicopter ultrashort wave conformal antenna |
| CN112216970A (en) * | 2020-09-25 | 2021-01-12 | 杭州泛利科技有限公司 | Miniaturized high-gain flexible unmanned aerial vehicle antenna |
| CN113745824A (en) * | 2021-07-26 | 2021-12-03 | 西安交通大学 | Dipole ground penetrating radar antenna and ground penetrating radar system |
| CN114122690A (en) * | 2021-11-11 | 2022-03-01 | 京信通信技术(广州)有限公司 | Radiation unit, antenna and base station |
-
2006
- 2006-10-26 CN CN2006101176020A patent/CN101170216B/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012065420A1 (en) * | 2010-11-16 | 2012-05-24 | 广东盛路通信科技股份有限公司 | Combined small diameter omni-directional antenna with dual-frequency |
| CN110571510A (en) * | 2019-08-28 | 2019-12-13 | 陕西烽火诺信科技有限公司 | Helicopter ultrashort wave conformal antenna |
| CN112216970A (en) * | 2020-09-25 | 2021-01-12 | 杭州泛利科技有限公司 | Miniaturized high-gain flexible unmanned aerial vehicle antenna |
| CN112216970B (en) * | 2020-09-25 | 2023-02-24 | 杭州泛利科技有限公司 | Miniaturized high-gain flexible unmanned aerial vehicle antenna |
| CN113745824A (en) * | 2021-07-26 | 2021-12-03 | 西安交通大学 | Dipole ground penetrating radar antenna and ground penetrating radar system |
| CN114122690A (en) * | 2021-11-11 | 2022-03-01 | 京信通信技术(广州)有限公司 | Radiation unit, antenna and base station |
| CN114122690B (en) * | 2021-11-11 | 2023-09-19 | 京信通信技术(广州)有限公司 | Radiating element, antenna and base station |
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| Publication number | Publication date |
|---|---|
| CN101170216B (en) | 2011-06-22 |
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Granted publication date: 20110622 Termination date: 20121026 |