CN109728444A - Double-frequency omnidirectional antenna - Google Patents
Double-frequency omnidirectional antenna Download PDFInfo
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- CN109728444A CN109728444A CN201811421990.0A CN201811421990A CN109728444A CN 109728444 A CN109728444 A CN 109728444A CN 201811421990 A CN201811421990 A CN 201811421990A CN 109728444 A CN109728444 A CN 109728444A
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Abstract
The invention discloses a kind of double-frequency omnidirectional antennas, including high frequency double-sided copper-clad pcb board, coaxial cable and radio frequency connector, the front of high frequency double-sided copper-clad pcb board is equipped with the first 2.4GHz band radiation oscillator, first 5GHz band radiation oscillator, frequency dividing unification route, feed connection point, first 2.4GHz band transmissions route and the first 5GHz band transmissions route, the back side of high frequency double-sided copper-clad pcb board is equipped with the 2nd 2.4GHz band radiation oscillator, 2nd 5GHz band radiation oscillator, balanced-to-unblanced transformer, 2nd 2.4GHz band transmissions route and the 2nd 5GHz band transmissions route；An impedance matching box is equipped with close to one end of the first 5GHz band radiation oscillator in frequency dividing unification route.Small volume of the present invention, gain is higher, structure is relatively simple, it is easy for installation, low in cost, there is while be easy to large-scale production two-band to cover and excellent radiance index again.
Description
Technical field
The present invention relates to field of antenna, in particular to a kind of double-frequency omnidirectional antenna.
Background technique
It is covered in the network of WLAN (the entitled Wireless Local Area Networks of English, be abbreviated as WLAN)
Gai Zhong in order to meet lesser antenna size and prevent the interference of other electromagnetic waves, while covering the requirement of multiple communications bands,
Double frequency and multifrequency antenna come into being.The double-frequency omnidirectional antenna of existing WLAN largely uses two width different frequencies
For antenna in antenna shell, such structure is bound to cause that antenna volume is big, and installation difficulty increases, at high cost, uncomfortable
Batch production is closed, and is also easy to produce interference between two width antennas, debugging is difficult, and the effect that product uses is poor.Small part double frequency omnibearing day
Line due to the problem of not can solve low standing wave, low-loss, high-gain and good directionality, there is bandwidth not enough,
The problems such as gain is high, radiance index error, it is difficult to meet WLAN platform equipment answering in wireless network covering
With.
Summary of the invention
The technical problem to be solved in the present invention is that in view of the above drawbacks of the prior art, a kind of small volume, increasing are provided
Benefit is higher, structure is relatively simple, it is easy for installation, low in cost, there is while be easy to large-scale production two-band covering and excellent again
The double-frequency omnidirectional antenna of good radiance index.
The technical solution adopted by the present invention to solve the technical problems is: constructing a kind of double-frequency omnidirectional antenna, including high frequency
The front of double-sided copper-clad pcb board, coaxial cable and radio frequency connector, the high frequency double-sided copper-clad pcb board is equipped with the first 2.4GHz
Band radiation oscillator, the first 5GHz band radiation oscillator, frequency dividing unification route, feed connection point, the first 2.4GHz band transmissions
Route and the first 5GHz band transmissions route, the first 2.4GHz band transmissions route become equipped with more piece 2.4GHz frequency range impedance
Thread-changing, the first 5GHz band transmissions route are equipped with more piece 5GHz frequency range impedance transformation line, the high frequency double-sided copper-clad pcb board
The back side be equipped with the 2nd 2.4GHz band radiation oscillator, the 2nd 5GHz band radiation oscillator, balanced-to-unblanced transformer, second
2.4GHz band transmissions route and the 2nd 5GHz band transmissions route, the balanced-to-unblanced transformer are arranged in the high frequency
The middle position at the back side of double-sided copper-clad pcb board；
The outer conductor of described coaxial cable one end and the first 2.4GHz band transmissions route welding be connected, inner conductor with
Route is unified by the frequency dividing after the feed connection point welding connection and is respectively communicated with the first 2.4GHz band transmissions line
Road and the first 5GHz band transmissions route, the first 2.4GHz band transmissions route also with the first 2.4GHz band radiation
Oscillator connection, the first 5GHz band transmissions route are also connected to the first 5GHz band radiation oscillator, the coaxial electrical
The other end of cable is connect with the radio frequency connector to be connected and by being welded and fixed；
Three group first is equipped with close to one end of the first 2.4GHz band radiation oscillator in the frequency dividing unification route to open
Route terminated line is equipped with two group of second open-circuit line terminated line, institute close to one end of the first 5GHz band radiation oscillator
It states in frequency dividing unification route and is equipped with an impedance matching box close to one end of the first 5GHz band radiation oscillator.
In double-frequency omnidirectional antenna of the present invention, the first 2.4GHz band radiation oscillator, the first 5GHz frequency range
The height of radiating doublet, the 2nd 2.4GHz band radiation oscillator and the 2nd 5GHz band radiation oscillator is 1/4 λ0, wherein λ0For
The free wavelength in the space of center frequency point, the first 2.4GHz band radiation oscillator, the first 5GHz band radiation oscillator, second
It is the half-wave radiation vibration of the double-frequency omnidirectional antenna after 2.4GHz band radiation oscillator and the 2nd 5GHz band radiation oscillator feed
Son.
In double-frequency omnidirectional antenna of the present invention, the first 2.4GHz band radiation oscillator and the first 5GHz frequency range
Radiating doublet is printed on the front of the high frequency double-sided copper-clad pcb board with microstrip line, the 2nd 2.4GHz band radiation vibration
Son and the 2nd 5GHz band radiation oscillator are printed on the back side of the high frequency double-sided copper-clad pcb board with microstrip line.
In double-frequency omnidirectional antenna of the present invention, the high frequency double-sided copper-clad pcb board with a thickness of 0.80mm~
1.20mm, length are 297.85mm~299.25mm, and width is 26.46mm~27.55mm.
In double-frequency omnidirectional antenna of the present invention, the length of the impedance matching box is 4.30mm~5.20mm, wide
Degree is 3.80mm~4.40mm.
In double-frequency omnidirectional antenna of the present invention, the shape of the balanced-to-unblanced transformer is in convex shape.
Implement double-frequency omnidirectional antenna of the invention, has the advantages that the front due to high frequency double-sided copper-clad pcb board
The first 2.4GHz band radiation oscillator 11, the first 5GHz band radiation oscillator 12 and the 2nd 2.4GHz band radiation at the back side vibration
After son, the 2nd 5GHz band radiation oscillator feed, then the half-wave radiation oscillator of double-frequency omnidirectional antenna is constituted, simultaneously because high frequency is double
The front that copper pcb board is covered in face is equipped with a set of division and unifies route, 2.4GHz frequency range and 5GHz frequency range can be passed through frequency dividing unification
Route links up, and can expand significantly the bandwidth of antenna frequency band, to realize the multifrequency and broadband properties of frequency range；In transmission line roadlock
In anti-matching, the front of high frequency double-sided copper-clad pcb board is equipped with more piece impedance transformation line, open-circuit line terminated line and impedance matching
Device, the back side of high frequency double-sided copper-clad pcb board is equipped with balanced-to-unblanced transformer to be made to reach the perfect matching of antenna impedance
The double-frequency omnidirectional antenna small volume, gain is higher, structure is relatively simple, it is easy for installation, low in cost, be easy to large-scale production
While have again two-band cover and excellent radiance index.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the structural schematic diagram in double-frequency omnidirectional antenna one embodiment of the present invention；
Fig. 2 is the positive structure schematic of the embodiment medium-high frequency double-sided copper-clad pcb board；
Fig. 3 is the structure schematic diagram of the embodiment medium-high frequency double-sided copper-clad pcb board；
Fig. 4 is the structural schematic diagram of frequency dividing unification route in the embodiment；
Fig. 5 is the structural schematic diagram of balanced-to-unblanced transformer in the embodiment；
Fig. 6 is the standing wave pattern surveyed in the embodiment；
Fig. 7 is double-frequency omnidirectional antenna in the embodiment in low frequency 2450MHz measured pattern schematic diagram；
Fig. 8 is double-frequency omnidirectional antenna in the embodiment in high frequency 5500MHz measured pattern schematic diagram.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In order to realize the dual frequency characteristics of antenna and in the broadband properties of high band, and the loss of high band is reduced, and real
Existing good standing wave, gain and directional diagram, the present invention provides a kind of completely new double-frequency omnidirectional antennas, that is, are suitable for wireless local area
The double-frequency omnidirectional antenna that the 2.4GHz frequency range and 5.0GHz frequency range platform equipment of net use.Implement in double-frequency omnidirectional antenna of the present invention
In example, the structural schematic diagram of the double-frequency omnidirectional antenna is as shown in Figure 1.In Fig. 1, which includes high frequency double-sided copper-clad
Pcb board 1, coaxial cable 2 and radio frequency connector 3.In the present embodiment, the high frequency double-sided copper-clad pcb board 1 with a thickness of 0.80mm~
1.20mm, length are 297.85mm~299.25mm, and width is 26.46mm~27.55mm, the thickness of high frequency double-sided copper-clad pcb board 1
Degree is preferably 1.0mm.The length of impedance matching box 133 is 4.30mm~5.20mm, and width is 3.80mm~4.40mm.
Fig. 2 is the positive structure schematic of the present embodiment medium-high frequency double-sided copper-clad pcb board.In the present embodiment, high frequency is two-sided
The front for covering copper pcb board 1 is equipped with the first 2.4GHz band radiation oscillator 11, the first 5GHz band radiation oscillator 12, frequency dividing unification
Route 13, feed connection point 14, the first 2.4GHz band transmissions route 15 and the first 5GHz band transmissions route 16, first
2.4GHz band transmissions route 15 is equipped with (the first 2.4GHz frequency range resistance in referring to fig. 2 of more piece 2.4GHz frequency range impedance transformation line
Resistance thread-changing 151 and the 2nd 2.4GHz frequency range impedance transformation line 152), the first 5GHz band transmissions route 16 is equipped with more piece 5GHz
Frequency range impedance transformation line (the first 5GHz frequency range impedance transformation line 161 and the 2nd 5GHz frequency range impedance transformation line in referring to fig. 2
162).It has been designed to more piece impedance transformation line in the impedance matching of transmission line, it is humorous that coupling can be played in terms of impedance matching
The effect of vibration, to reach the conjugate impedance match of antenna impedance.
The outer conductor of 2 one end of coaxial cable and the welding of the first 2.4GHz band transmissions route 15 are connected, inner conductor and feed
The first 2.4GHz band transmissions route 15 and first is respectively communicated with by frequency dividing unification route 13 after the welding connection of tie point 14
5GHz band transmissions route 16, the first 2.4GHz band transmissions route 15 are also connected to the first 2.4GHz band radiation oscillator 11,
First 5GHz band transmissions route 16 is also connected to the first 5GHz band radiation oscillator 12, the other end and radio frequency of coaxial cable 2
The connection of connector 3 is connected and by being welded and fixed.
Fig. 3 is the structure schematic diagram of the present embodiment medium-high frequency double-sided copper-clad pcb board.In Fig. 3, the high frequency double-sided copper-clad
The back side of pcb board 1 is equipped with the 2nd 2.4GHz band radiation oscillator 21, the 2nd 5GHz band radiation oscillator 22, balanced-unbalanced and turns
Parallel operation 23, the 2nd 2.4GHz band transmissions route 24 and the 2nd 5GHz band transmissions route 25, balanced-unbalanced are converted 23 devices and are set
Set the middle position at the back side of high frequency double-sided copper-clad pcb board 1.
The height of the radiating doublet of the front and back of high frequency double-sided copper-clad pcb board 1 is 1/4 λ0(λ0For the sky of center frequency point
Between free wavelength), then constitute double-frequency omnidirectional antenna after the front and back radiating doublet of high frequency double-sided copper-clad pcb board 1 feed
Half-wave radiation oscillator.Specifically, the first 2.4GHz band radiation oscillator 11, the first 5GHz band radiation oscillator 12, second
The height of 2.4GHz band radiation oscillator 21 and the 2nd 5GHz band radiation oscillator 22 is 1/4 λ0, wherein λ0For center frequency point
The free wavelength in space, the first 2.4GHz band radiation oscillator 11, the first 5GHz band radiation oscillator 12, the 2nd 2.4GHz frequency range
It is the half-wave radiation oscillator of double-frequency omnidirectional antenna after radiating doublet 21 and the 2nd 5GHz band radiation oscillator 22 feed.
Fig. 4 is the structural schematic diagram of frequency dividing unification route in the present embodiment, in Fig. 4, close to the in frequency dividing unification route 13
One end of one 2.4GHz band radiation oscillator 11 is equipped with three group of first open-circuit line terminated line 131, close to the first 5GHz frequency range spoke
The one end for penetrating oscillator 12 is equipped with two group of second open-circuit line terminated line 132, close first 5GHz frequency range in frequency dividing unification route 13
One end of radiating doublet 12 is equipped with an impedance matching box 133.Multiple groups open-circuit line matched line is set in frequency dividing unification route 13
Road and impedance matching box 133 are able to achieve multifrequency unification and obtain biggish bandwidth and improve the effect of radiance index, can obtain
Relatively wide frequency bandwidth and directional diagram can be obtained under the premise of voltage standing wave ratio is relatively low by obtaining good broadband properties
Characteristic can be good at the requirement for meeting operators communication system.
Fig. 5 is the structural schematic diagram of balanced-to-unblanced transformer in the present embodiment, and in the present embodiment, balanced-unbalanced turns
The shape of parallel operation 23 is in convex shape.Using the design of balanced-to-unblanced transformer 23, it can both increase bandwidth, while in impedance
Matching aspect also plays the effect of coupled resonance, so that the imbalance of electric current becomes balancing, forms broadband and low standing wave
Characteristic, to reach the conjugate impedance match of antenna impedance.
Double-frequency omnidirectional antenna of the invention be it is a apply WLAN covering platform equipment on, it is micro- using medium
Band technology, multifrequency and broadband technology, frequency dividing unification technique and impedance match technique, make the equipment of WLAN, work in
Centre frequency is 2.4GHz (2400MHz~2500MHz) and two frequency ranges of 5.0GHz (5150MHz~5850MHz), so that equipment
The signal with received centre frequency for two frequency ranges of 2.4GHz and 5.0GHz can be emitted, and it is double to reach realization on a port
The effect of frequency resonance, realizes the telecommunications use of two-band.The small volume of double-frequency omnidirectional antenna of the invention, gain is higher, ties
Structure is relatively simple, it is easy for installation, low in cost, there is while be easy to large-scale production two-band to cover and excellent radiativity again
It can index.
It is noted that in the present embodiment, the first 2.4GHz band radiation oscillator 11 and the vibration of the first 5GHz band radiation
Son 12 is printed on the front of high frequency double-sided copper-clad pcb board 1 with microstrip line, the 2nd 24GHz band radiation oscillator 21 and second
5GHz band radiation oscillator 22 is printed on the back side of high frequency double-sided copper-clad pcb board 1 with microstrip line.
The sample of double-frequency omnidirectional antenna of the invention through multiple improve and perfect, realize by the most detection verifying through instrument afterwards
The resonance of double frequency inside a port, frequency range are 2400MHz~2500MHz/5150MHz-5850MHz, and standing-wave ratio exists
1.7 or less (below Industry code requirements 2.0), low-frequency range 2400MHz~2500MHz gain reach 5dBi (Industry code requirements
4dBi), high band 5150MHz~5850MHz gain reaches 6dBi (Industry code requirements 5dBi), and horizontal radiation pattern is non-round
Degree is within ± 1dB (out-of-roundness of Industry code requirements horizontal radiation pattern is within ± 2dB), such as Fig. 6, Fig. 7 and Fig. 8 institute
Show, Fig. 6 is the standing wave pattern surveyed in the present embodiment；Fig. 7 is that double-frequency omnidirectional antenna is surveyed in low frequency 2450MHz in the present embodiment
Directional diagram schematic diagram；Fig. 8 is double-frequency omnidirectional antenna in the present embodiment in high frequency 5500MHz measured pattern schematic diagram.
The performance indicator of double-frequency omnidirectional antenna of the invention is far better than same type antenna；The double-frequency omnidirectional antenna not only property
Energy index is excellent, and small volume, and lighter in weight is easy for installation, and cost is relatively low, is easy to large-scale production, is able to satisfy
WLAN covers the demand of two communications bands simultaneously, while being also able to satisfy equipment operator low cost and high performance wanting
It asks, and has the characteristics that structure is simple and high-performance.
In short, compared with the prior art, the advantages of double-frequency omnidirectional antenna of the invention, is as follows: 1) breaking through conventional omni-directional antenna
The limitation of single frequency band system radiation can solve traditional double-frequency omnidirectional antenna difficulty processing, hardly possible is debugged, at high cost and performance is poor
Problem is able to achieve multiband and wide band omnidirectional radiation.2) low in cost, production is simple, is easy to large-scale production.3) volume compared with
It is small, lighter in weight, convenient for the installation of antenna.4) loss is smaller, and gain is higher, and directional diagram out-of-roundness is preferable, and standing-wave ratio is low, can subtract
The debug time of few antenna, improves production efficiency.5) antenna two-band covers, and can overcome the disadvantages that the narrow deficiency of same type antenna frequency band,
Meet the needs of telecom equipment vendor covers multiple communications bands, while being also able to satisfy equipment operator low cost and high performance
It is required that.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (6)
1. a kind of double-frequency omnidirectional antenna, which is characterized in that including high frequency double-sided copper-clad pcb board, coaxial cable and radio frequency connector,
The front of the high frequency double-sided copper-clad pcb board is equipped with the first 2.4GHz band radiation oscillator, the first 5GHz band radiation oscillator, divides
Frequency unification route, feed connection point, the first 2.4GHz band transmissions route and the first 5GHz band transmissions route, described first
2.4GHz band transmissions route is equipped with more piece 2.4GHz frequency range impedance transformation line, and the first 5GHz band transmissions route is equipped with more
Save 5GHz frequency range impedance transformation line, the back side of the high frequency double-sided copper-clad pcb board is equipped with the 2nd 2.4GHz band radiation oscillator, the
Two 5GHz band radiation oscillators, balanced-to-unblanced transformer, the 2nd 2.4GHz band transmissions route and the 2nd 5GHz band transmissions
The middle position at the back side of the high frequency double-sided copper-clad pcb board is arranged in route, the balanced-to-unblanced transformer；
The outer conductor of described coaxial cable one end and the first 2.4GHz band transmissions route welding be connected, inner conductor with it is described
Feed connection point welding connection after by the frequency dividing unification route be respectively communicated with the first 2.4GHz band transmissions route with
First 5GHz band transmissions route, the first 2.4GHz band transmissions route also with the first 2.4GHz band radiation oscillator
Connection, the first 5GHz band transmissions route are also connected to the first 5GHz band radiation oscillator, the coaxial cable
The other end is connect with the radio frequency connector to be connected and by being welded and fixed；
Three group of first open-circuit line is equipped with close to one end of the first 2.4GHz band radiation oscillator in the frequency dividing unification route
Terminated line, close to the first 5GHz band radiation oscillator one end be equipped with two group of second open-circuit line terminated line, described point
An impedance matching box is equipped with close to one end of the first 5GHz band radiation oscillator in frequency unification route.
2. double-frequency omnidirectional antenna according to claim 1, which is characterized in that the first 2.4GHz band radiation oscillator,
The height of first 5GHz band radiation oscillator, the 2nd 2.4GHz band radiation oscillator and the 2nd 5GHz band radiation oscillator is 1/
4λ0, wherein λ0For the free wavelength in space of center frequency point, the first 2.4GHz band radiation oscillator, the first 5GHz frequency range spoke
Penetrating after oscillator, the 2nd 2.4GHz band radiation oscillator and the 2nd 5GHz band radiation oscillator are fed is the double-frequency omnidirectional antenna
Half-wave radiation oscillator.
3. double-frequency omnidirectional antenna according to claim 2, which is characterized in that the first 2.4GHz band radiation oscillator and
First 5GHz band radiation oscillator is printed on the front of the high frequency double-sided copper-clad pcb board with microstrip line, and described second
2.4GHz band radiation oscillator and the 2nd 5GHz band radiation oscillator are printed on the high frequency double-sided copper-clad pcb board with microstrip line
On the back side.
4. according to claim 1 to double-frequency omnidirectional antenna described in 3 any one, which is characterized in that the high frequency double-sided copper-clad
Pcb board with a thickness of 0.80mm~1.20mm, length is 297.85mm~299.25mm, and width is 26.46mm~27.55mm.
5. according to claim 1 to double-frequency omnidirectional antenna described in 3 any one, which is characterized in that the impedance matching box
Length is 4.30mm~5.20mm, and width is 3.80mm~4.40mm.
6. according to claim 1 to double-frequency omnidirectional antenna described in 3 any one, which is characterized in that the balanced-unbalanced turns
The shape of parallel operation is in convex shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811421990.0A CN109728444A (en) | 2018-11-27 | 2018-11-27 | Double-frequency omnidirectional antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811421990.0A CN109728444A (en) | 2018-11-27 | 2018-11-27 | Double-frequency omnidirectional antenna |
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| Publication Number | Publication Date |
|---|---|
| CN109728444A true CN109728444A (en) | 2019-05-07 |
Family
ID=66295101
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811421990.0A Pending CN109728444A (en) | 2018-11-27 | 2018-11-27 | Double-frequency omnidirectional antenna |
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| CN104064876A (en) * | 2014-06-16 | 2014-09-24 | 北京理工大学 | Micro-strip array omnidirectional communication antenna |
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| CN206820111U (en) * | 2017-02-16 | 2017-12-29 | 深圳市仁丰电子科技有限公司 | A kind of high-gain omni-directional antenna |
| CN108172986A (en) * | 2017-12-06 | 2018-06-15 | 广州创锦通信技术有限公司 | Dual-frequency P CB plate antennas |
| CN108598699A (en) * | 2018-05-16 | 2018-09-28 | 广东通宇通讯股份有限公司 | Vertical polarization full-wave dipole array antenna and directional radiation antenna |
-
2018
- 2018-11-27 CN CN201811421990.0A patent/CN109728444A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2645254Y (en) * | 2003-09-05 | 2004-09-29 | 陈晖� | Microstrip omnidirectional antenna |
| CN200993999Y (en) * | 2006-11-03 | 2007-12-19 | 寰波科技股份有限公司 | Dual-frequency omni directional antenna |
| CN104064876A (en) * | 2014-06-16 | 2014-09-24 | 北京理工大学 | Micro-strip array omnidirectional communication antenna |
| CN205376749U (en) * | 2016-01-07 | 2016-07-06 | 常熟市泓博通讯技术股份有限公司 | Unmanned aerial vehicle high -gain multielement antenna |
| CN206820111U (en) * | 2017-02-16 | 2017-12-29 | 深圳市仁丰电子科技有限公司 | A kind of high-gain omni-directional antenna |
| CN108172986A (en) * | 2017-12-06 | 2018-06-15 | 广州创锦通信技术有限公司 | Dual-frequency P CB plate antennas |
| CN108598699A (en) * | 2018-05-16 | 2018-09-28 | 广东通宇通讯股份有限公司 | Vertical polarization full-wave dipole array antenna and directional radiation antenna |
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Application publication date: 20190507 |