CN106654557A - Dual-frequency-point broadband dipole antenna - Google Patents
Dual-frequency-point broadband dipole antenna Download PDFInfo
- Publication number
- CN106654557A CN106654557A CN201611169706.6A CN201611169706A CN106654557A CN 106654557 A CN106654557 A CN 106654557A CN 201611169706 A CN201611169706 A CN 201611169706A CN 106654557 A CN106654557 A CN 106654557A
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- antenna
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- balun
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/10—Resonant antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
- H01Q9/20—Two collinear substantially straight active elements; Substantially straight single active elements
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- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention discloses a dual-frequency-point broadband dipole antenna. The dual-frequency-point broadband dipole antenna comprises a balun and two antenna radiation arms arranged on a substrate, wherein the two antenna radiation arms are connected with the output end of the balun through transmission lines which are perpendicularly connected to one ends of the two antenna radiation arms respectively; the other ends of the antenna radiation arms are used as open-circuit ends which are step-shaped and retracted to the transmission line sides; the widths of the antenna radiation arms are greater than that of the transmission lines; and chamfers are arranged on the opposite side of the end parts, connected with the transmission lines, of the antenna radiation arms. By additionally adding the transmission lines to the single dipole antenna, the antenna generates a second resonant frequency point, and the widths of the radiation arms of the antenna are improved; by setting the open-circuit ends of the antenna radiation arms into step shape and by combination with the chamfers, multiple current paths of different lengths are formed, and multi-frequency-band coverage is realized; by virtue of the single antenna, the gain of different frequency bands is the same, so that signal processing difficulty of the system is greatly lowered; and furthermore, the dual-frequency-point broadband dipole antenna is high in radiation omnidirectivity and stable in-band gain.
Description
Technical field
The present invention relates to dipole antenna field, and in particular to a kind of dual-frequency point broadband dipole antenna.
Background technology
In GSM, antenna as wireless signal gateway, it is channel capacity, transmission speed to system, logical
There is crucial effect in letter quality and coverage.Into 3G（The Third Generation Mobile
Communication）Since epoch, GSM is more and more to the type of service that mobile subscriber provides, these business
Different radio bands are dispensed on, need to use different antennas；But multiple antennas are when closely installing, each other
Coupled interference is serious, so the built-in aerial of the antenna in Modern Mobile Communications Systems, especially mobile terminal, should adopt as far as possible
With broad-band antenna, realize that multiband is covered, to reduce antenna usage quantity.
In order to realize that multiband is covered, it is modern mobile logical that research staff is usually taken multiple radiating element integrated technology designs
Letter antenna.《Chun-I Lin , Kin-Lu Wong,Printed Monopole Slot Antenna for Internal
Multiband Mobile Phone Antenna,IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION,
VOL. 55, NO. 12, DECEMBER 2007,pp:3690-3697.》Disclose single with straight slot radiation on earth conductor plate
First and curved gap radiation unit realizes a broadband built-in antenna of mobile phone；《Kin-Lu Wong, Wei-Ji Chen, Ting-
Wei Kang,Small-Size Loop Antenna With a Parasitic Shorted Strip Monopole for
Internal WWAN Notebook Computer,IEEE TRANSACTIONS ON ANTENNAS AND
PROPAGATION, VOL. 59, NO. 5, MAY 2011,pp:1733-1738.》Disclose with ring radiation unit with post
Raw monopole radiating element integration realization broadband embedded antenna for mobile terminal；《HanJiang Liu, RongLin Li, Yan
Pan,et al.A Multi-Broadband Planar Antenna for GSM/ UMTS/LTE and WLAN/WiMAX
Handsets, IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL. 62, NO. 5, MAY
2014, pp：2856-2860.》Disclose and be bent into monopole radiating element of different shapes with many length difference microband pastes
Realize that mobile terminal is built-in antenna integrated；《Chuan-Ling Hu, Wen-Feng Lee, Ye-Ee Wu, et al.A
Compact Multiband Inverted-F Antenna for LTE/WWAN/GPS/WiMAX/WLAN Operations
in the Laptop Computer,IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS, VOL.
9, 2010,pp:1169-1173.》Disclose and the built-in IFA antennas of notebook are realized with radiating element multiple-branching construction.Above-mentioned text
Data result in offering all reflects some common problems：The antenna integrated gain phase in different frequency range of this kind of many radiating elements
Difference is larger, and to the signal transacting of system difficulty is brought；Differ larger in different directions radiation intensity, for position time-varying, direction
The mobile terminal of time-varying, such case will affect communication quality.
The content of the invention
The invention discloses a kind of dual-frequency point broadband dipole antenna, can solve prior art using many radiating elements
It is antenna integrated come realize multiband cover, cause different frequency range gain differ it is larger, bring difficulty to the signal transacting of system
Degree, and differ larger problem in different directions radiation intensity.
The present invention is achieved through the following technical solutions：
A kind of dual-frequency point broadband dipole antenna, including the balun being arranged on substrate and two strip antenna radiation arms, described two
Strip antenna radiation arm connects respectively the output end of balun by being vertically connected at the transmission line of its one end, the aerial radiation arm
The other end is respectively the stairstepping drawn in transmission line place side as open end；The width of the aerial radiation arm is more than transmission
The width of line, the aerial radiation arm end couple positioned opposite that transmission line is connected has chamfering.
The further scheme of the present invention is that the two strip antennas radiation arm is respectively arranged at the obverse and reverse of substrate, institute
Stating balun includes being respectively arranged at second of substrate positive first and substrate reverse side, and described first and second passes through
Metallic vias through substrate are turned on.
The further scheme of the present invention is that second of the balun includes that first level portion and four one end side by side connect
The vertical portion in first level portion is connected to, four vertical portions are parallel with transmission line, the length per vertical portion described in bar is equal to day
The a quarter of line resonance wavelength；It is C microstrip lines positioned at two vertical portions in outside, is that B is micro- positioned at two middle vertical portions
Band line, is connected with the second horizontal part between the other end of two B microstrip lines, two B microstrip lines, first level portion and
Second horizontal part is surrounded in the window region of formation and is provided with A microstrip lines, and the first level portion and the second horizontal part are relative
Outside is respectively arranged with first input end and the first output end；First of the balun include two port lines, described two
Respectively as the second input and the second output end, the inner extends respectively to window region in the positive throwing of substrate for the outer end of port lines
Shadow zone, and respectively by metallic vias and the conducting of A microstrip lines.
The further scheme of the present invention is that the window region is additionally provided with parasitic patch in the positive projected area of substrate.
Present invention advantage compared with prior art is：
First, electrode couple sub-antenna sets up transmission line, makes antenna produce second resonance frequency, increases aerial radiation arm width, and
Aerial radiation arm open end is set to into stairstepping, with reference to the setting of chamfering, the current path of a plurality of different length is formed, is realized
Multiband is covered；Due to using single antenna, gain stabilization in working frequency range, the signal transacting difficulty of system significantly drops
It is low and radiate omni-directional it is good, it is to avoid mobile terminal Orientation differences cause signal blind zone；
2nd, balun aerial radiation arm adopts antarafacial structure, realizes the miniaturization of antenna；
3rd, A microstrip lines and B microstrip lines offset uneven feed as transmission circuit by the C microstrip lines parallel with transmission circuit
The cross radiance for causing, realizes uneven-balance conversion；
4th, parasitic patch introduces lumped capacity and makes second resonance frequency to low frequency wonder, coverage goal frequency range.
Description of the drawings
Fig. 1 is the antenna face structural representation of the present invention.
Fig. 2 is the antenna reverse structure schematic of the present invention.
Fig. 3 is the antenna return loss curve map of different in width aerial radiation arm.
Fig. 4 is the different antenna return loss curve map of two kinds of aerial radiation arm open ends.
Fig. 5 is to introduce the antenna return loss curve map before and after parasitic patch.
Fig. 6 is the antenna return loss curve map in embodiment.
Fig. 7 is the antenna maximum gain simulation curve figure in embodiment.
H face directional diagrams of the Fig. 8 for the antenna in embodiment when the signal of 2.3GHz is encouraged.
E face directional diagrams of the Fig. 9 for the antenna in embodiment when the signal of 2.3GHz is encouraged.
Specific embodiment
A kind of dual-frequency point broadband dipole antenna as depicted in figs. 1 and 2, including the balun that is arranged on substrate 1 and
Two strip antenna radiation arms 2, the two strip antennas radiation arm 2 is respectively arranged at the obverse and reverse of substrate 1, per strip antenna radiation arm
2 one side is free space, and another side is substrate 1, and the coupled wavelength between two strip antenna radiation arms 2 in substrate 1 significantly subtracts
It is short；The balun includes being respectively arranged at second of substrate 1 positive first and the reverse side of substrate 1, and the second of the balun
Portion includes that first level portion 5 and four one end side by side are connected to the vertical portion in first level portion 5, per the length of vertical portion described in bar
A quarter of the degree equal to antenna resonance wavelength；Gap is left between adjacent vertical portion, is C positioned at two vertical portions in outside
Microstrip line 6, is B microstrip lines 7 positioned at two middle vertical portions, and between the other end of two B microstrip lines 7 second is connected with
Horizontal part 8, two B microstrip lines 7, the horizontal part 8 of first level portion 5 and second are surrounded in the window region 9 for being formed and are provided with A
Microstrip line 10, between being respectively kept between the A microstrip lines 10 and two B microstrip lines 7, the horizontal parts 8 of first level portion 5 and second
Gap, the horizontal part 8 of the first level portion 5 and second is respectively arranged with first input end and the first output end in opposite exterior lateral sides；Institute
Stating first of balun includes two port lines 11, and the outer end of two port lines 11 is respectively as the second input and second
Output end, the inner extends respectively to window region 9 in the positive projected area 12 of substrate 1, and respectively by metallic vias 4 and A micro-strips
Line 10 is turned on, and the projected area 12 is additionally provided with parasitic patch 13.The two strip antennas radiation arm 2 is respectively by being vertically connected at
The transmission line 3 of its one end connects the first output end, second output end of balun, and the transmission line 3 is parallel with four vertical portions, institute
The other end for stating aerial radiation arm 2 is respectively the stairstepping drawn in the place side of transmission line 3 as open end；The aerial radiation
The width of arm 2 is more than the width of transmission line 3, and the end couple positioned opposite of aerial radiation arm 2 that transmission line 3 is connected has chamfering.
Gap very little between A microstrip lines 10, B microstrip lines 7 and C microstrip lines 6, stronger coupling makes electricity on A microstrip lines 10
Stream is symmetrically distributed near the both sides in gap, the distribution of the inner side of B microstrip lines 7 and the equivalent reversing the current of A microstrip lines 10；When C microstrip lines 6
When being equal to antenna resonance wavelength a quarter with the length of B microstrip lines 7, mismatch current is by between C microstrip lines 6 and B microstrip lines 7
The equivalent reversely distribution in gap both sides, realizes that balanced-unbalanced is matched.
Chinese T D-LTE standard business frequency range is：
Covering whole TD-LTE 7 business frequency ranges of standard as 2.3GHz, less than -10dB frequency bands as main resonance frequency with target is
Example, adopts thickness for 1.6mm, relative dielectric constant εr=4.4 substrate 1, the first input end of balun and the second input connect
Characteristic impedance is that 50 ohm of coaxial feeder is fed；Each structural parameters in Fig. 1 and Fig. 2（Unit：mm）It is as follows：
| L1 | W1 | L2 | W2 | L3 | W3 | a | b | c | d | G |
| 23.5 | 5.1 | 24.5 | 2.2 | 6 | 2.2 | 2.7 | 8.5 | 2.1 | 0.9 | 0.3 |
The most long part of total length of two strip antenna radiation arms 2 is only 49.2mm, and《Liu Qi. Meta Materials are in UHF RFID antenna
In application study [D]. Nanjing Aero-Space University, 2015.》With《Wang C, Ge Y. Broadband printed
dipole an-tenna with T-shape loadings[C]. Antenna Tec-hnology:" Small
Antennas, Novel EM Struct-ures and Materials, and Applications"(iWAT), 2014
International Works-hop on. IEEE, 2014: 322-324.》Disclosed in resonant frequency be 2.45GHz, adopt
The coplanar element antenna of both arms is taken, two-arm overall length is 72mm, and free space medium frequency is slightly long for the electromagnetic wavelength of 2.3GHz
In 2.45GHz, but the bright aerial radiation arm antarafacial of above aerial radiation brachium contrast table is placed and can significantly reduce antenna length.
Dipole antenna belongs to resonant antenna, and it is the key parameter for determining resonance frequency to radiate arm lengths, and radiation arm
Width mainly affects the bandwidth of operation of antenna.When remaining parameter constant, when radiation arm width W1 changes, as shown in figure 3, with W1
Increase, the return loss of corresponding frequency higher frequency band（S11）Increase therewith less than -10dB bandwidth；During W1 values 5.1mm,
When S11 is bigger less than -10dB, but W1 values between 2.06～2.60GHz, antenna low frequency characteristic is degraded, correspondence in such as Fig. 3
The return loss of W1=5.78mm（S11）Curve；Because TD-LTE standard highest frequency ranges are 2635～2655MHz of China Telecom,
To avoid continuing to widen radiation arm deterioration low frequency characteristic, the open end of radiation arm is set to when radiation arm width 5.1mm is kept
Stairstepping is gradually shortened, and reduces radiation electric flow path journey, makes return loss（S11）The frequency band upper limit less than -10dB is lifted.
Radiation arm length and width is identical, and open end is respectively the return loss of concordant and step-like two kinds of antenna structures
（S11）Simulation curve as shown in figure 4, the concordant antenna of radiation arm open end high frequency band in 2.06～2.60GHz echo
Loss（S11）Less than -10dB, and the high frequency band of the antenna that radiation arm open end is stepped echo in 2.10～3GHz is damaged
Consumption（S11）It is below -10dB.
Chinese T D-LTE standard in addition to distributing in 2300～2655MHz 6 frequency ranges, also at China Mobile one
In the relatively low-frequency range of 1880～1890MHz.Transmission line 3 can be equivalent to the part-structure of aerial radiation arm and extend bending, so as to increase
Plus resonance current path, produce second new resonance frequency in stability at lower frequencies.The each physical dimension of antenna is carried out with HFSS
Optimization, as a result shows that length of transmission line L3 and width W3 is respectively 6mm and 2.2mm in this antenna, and overall target is optimal, but
Return loss at second resonance point（S11）It is 1890～1920MHz less than -10dB band limits, for this purpose, introducing parasitic patch
13, increase capacitive reactance in antenna feeding circuit, the simulation result according to Fig. 5 shows, introduce parasitic patch after second it is humorous
Return loss at shaking（S11）It is 1870-1910MHz less than -10dB band limits, allows antenna that Chinese T D- is completely covered
All of 7 frequency ranges of LTE standards.
As shown in fig. 6, in the range of 1.8GHz to 3GHz, emulating and surveying return loss（S11）Curves are preferable, and two
Individual resonance frequency is essentially coincided.Simulated return loss（S11）Curve in 1.88～1.92GHz and 2.1～3GHz frequency ranges,
Actual measurement return loss（S11）- 10dB is less than in 1.87～1.91GHz and 2.1GHz～2.72 frequency range, meeting engineering should
With, and whole business frequency ranges of Chinese T D-LTE standard shown in table one can be covered.If according to the mobile terminal such as mobile phone day
Line S11 meets the index request of application less than -6dB, and the antenna has broader bandwidth of operation.
Fig. 7 is that HFSS emulation obtains maximum gain curve to the antenna at each frequency in the range of 1.8～3GHz, and the curve can
To find out in the frequency range analyzed, in addition to being slightly less than 2dB less than maximum gain in the range of 2GHz very littles, other frequencies
The maximum gain of point is substantially Stationary Distribution in the range of 2～2.6dB.
Fig. 8 and Fig. 9 are respectively the E faces of antenna and H faces directional diagram, two width when being encouraged with the signal of main resonatnt frequency 2.3GHz
Emulation and measured curve in figure coincide preferably, embodies the radiation characteristic of dipole antenna.In Fig. 8, H faces directional diagram is emulated
, in 0.5dB or so, omnidirectional's characteristic is preferably, slightly larger to out-of-roundness after the directional diagram of actual measurement H faces, this is because fixing during actual measurement for out-of-roundness
The support of antenna generates impact to radiation.In Fig. 9, emulate and survey directional diagram all to embody dipole antenna E faces is in " 8 " shape
, rear to 15 degree or so of main radiation direction is all slightly offset, this is because balun is present for radiation characteristic, emulation and actual measurement directional diagram
Frequency characteristic, perfect can not realize uneven-balance conversion at non-central frequency；Emulation forward-wave is wider than before actual measurement to lobe
Lobe, reason is the test condition that the microwave dark room of 3m × 4m × 3m cannot meet far field.
In sum, -10dB the frequency bands of the antenna of the present embodiment can cover the TD-LTE standards whole 7 of Chinese 4G standards
Gain stabilization, radiation omni-directional are good in individual business frequency range, frequency band, are different from other many radiating elements of 4G mobile communication broad band antennas
Integrated method for designing, the design realizes wideband and double frequency with single dipole, possesses other 4G antennas incomparable
Radiation characteristic and stable gain, the transmission quality of communication system can be effectively improved.
Claims (4)
1. a kind of dual-frequency point broadband dipole antenna, including the balun being arranged on substrate and two strip antenna radiation arms, it is special
Levy and be：The two strip antennas radiation arm connects respectively the output end of balun, institute by being vertically connected at the transmission line of its one end
The other end for stating aerial radiation arm is respectively the stairstepping drawn in transmission line place side as open end；The aerial radiation arm
Width more than transmission line width, the aerial radiation arm end couple positioned opposite that transmission line is connected has chamfering.
2. a kind of dual-frequency point broadband dipole antenna as claimed in claim 1, it is characterised in that：The two strip antennas radiation
Arm is respectively arranged at the obverse and reverse of substrate, and the balun includes being respectively arranged at substrate positive first and substrate reverse side
Second, described first and second by through substrate metallic vias turn on.
3. a kind of dual-frequency point broadband dipole antenna as claimed in claim 2, it is characterised in that：Second of the balun
The vertical portion in first level portion, four vertical portions and transmission line are connected to including first level portion and four one end side by side
Parallel, the length per vertical portion described in bar is equal to a quarter of antenna resonance wavelength；It is that C is micro- positioned at two vertical portions in outside
Band line, is B microstrip lines positioned at two middle vertical portions, and between the other end of two B microstrip lines the second level is connected with
Portion, two B microstrip lines, first level portion and the second horizontal part are surrounded in the window region of formation and are provided with A microstrip lines, institute
State first level portion and the second horizontal part and be respectively arranged with first input end and the first output end in opposite exterior lateral sides；The balun
First includes two port lines, and the outer end of two port lines is inner respectively as the second input and the second output end
Window region is extended respectively in the positive projected area of substrate, and respectively by metallic vias and the conducting of A microstrip lines.
4. a kind of dual-frequency point broadband dipole antenna as claimed in claim 3, it is characterised in that：The window region is in substrate
Positive projected area is additionally provided with parasitic patch.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611169706.6A CN106654557B (en) | 2016-12-16 | 2016-12-16 | Double-frequency-point broadband dipole antenna |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611169706.6A CN106654557B (en) | 2016-12-16 | 2016-12-16 | Double-frequency-point broadband dipole antenna |
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| CN106654557A true CN106654557A (en) | 2017-05-10 |
| CN106654557B CN106654557B (en) | 2023-09-29 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107317106A (en) * | 2017-07-05 | 2017-11-03 | 中国人民解放军国防科学技术大学 | Wide band miniaturization Vivaldi antennas can be achieved in one kind |
| CN108346855A (en) * | 2018-03-02 | 2018-07-31 | 深圳市信维通信股份有限公司 | A kind of millimeter wave antenna monomer |
| CN109326877A (en) * | 2018-11-15 | 2019-02-12 | 江苏捷士通射频***有限公司 | Ultra wideband dual polarization radiating element |
| CN111224224A (en) * | 2018-11-27 | 2020-06-02 | 华为技术有限公司 | Antenna and array antenna |
| CN112751158A (en) * | 2019-10-31 | 2021-05-04 | 华为技术有限公司 | Antenna assembly and communication equipment |
| CN112909505A (en) * | 2019-12-27 | 2021-06-04 | 华为技术有限公司 | Antenna and electronic equipment |
| CN113300110A (en) * | 2021-04-25 | 2021-08-24 | 中国电子科技集团公司第二十九研究所 | Quasi-coaxial slot feed cavity-backed antenna |
| CN113937490A (en) * | 2020-07-13 | 2022-01-14 | 华为技术有限公司 | Antenna and wireless device |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107317106A (en) * | 2017-07-05 | 2017-11-03 | 中国人民解放军国防科学技术大学 | Wide band miniaturization Vivaldi antennas can be achieved in one kind |
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| CN108346855A (en) * | 2018-03-02 | 2018-07-31 | 深圳市信维通信股份有限公司 | A kind of millimeter wave antenna monomer |
| CN108346855B (en) * | 2018-03-02 | 2024-04-16 | 深圳市信维通信股份有限公司 | Millimeter wave antenna monomer |
| CN109326877A (en) * | 2018-11-15 | 2019-02-12 | 江苏捷士通射频***有限公司 | Ultra wideband dual polarization radiating element |
| CN111224224A (en) * | 2018-11-27 | 2020-06-02 | 华为技术有限公司 | Antenna and array antenna |
| US11901633B2 (en) | 2018-11-27 | 2024-02-13 | Huawei Technologies Co., Ltd. | Antenna and array antenna |
| CN112751158B (en) * | 2019-10-31 | 2022-05-17 | 华为技术有限公司 | Antenna assembly and communication equipment |
| CN112751158A (en) * | 2019-10-31 | 2021-05-04 | 华为技术有限公司 | Antenna assembly and communication equipment |
| CN112909505A (en) * | 2019-12-27 | 2021-06-04 | 华为技术有限公司 | Antenna and electronic equipment |
| CN113937490A (en) * | 2020-07-13 | 2022-01-14 | 华为技术有限公司 | Antenna and wireless device |
| CN113937490B (en) * | 2020-07-13 | 2023-05-16 | 华为技术有限公司 | Antenna and wireless device |
| CN113300110A (en) * | 2021-04-25 | 2021-08-24 | 中国电子科技集团公司第二十九研究所 | Quasi-coaxial slot feed cavity-backed antenna |
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