CN109149079A - Ultra-wideband monopole antenna - Google Patents
Ultra-wideband monopole antenna Download PDFInfo
- Publication number
- CN109149079A CN109149079A CN201710452818.0A CN201710452818A CN109149079A CN 109149079 A CN109149079 A CN 109149079A CN 201710452818 A CN201710452818 A CN 201710452818A CN 109149079 A CN109149079 A CN 109149079A
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- China
- Prior art keywords
- monopole
- metal floor
- ultra
- wideband
- antenna
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- 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
- H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
Abstract
The invention discloses a kind of ultra-wideband monopole antennas, the antenna includes monopole, metal floor, feedback needle, the feedback needle passes through the metal floor and is connected on the monopole, and is provided with a round gap on the metal floor centered on the feedback needle；The monopole is set to above the metal floor, is vertically connected with by two, the metal cylinder of diameter not etc. is constituted, and top cyclotomy column diameter is greater than lower partial cylinder；The axial cross section outer periphery of the monopole is rectangular step shape.Stepped cylinder monopole compared to existing monopole, antenna impedance bandwidth be improved significantly, UWB band limits can be covered；The design of metal floor can increase aerial radiation intensity；There are many feed structures, meets different the needs of using；Working frequency range covers 3.1GHz-10.6GHz, this frequency range is suitable for ultra wide band (UWB) communication system, is suitable for a wide range of popularization and application, voltage standing wave ratio VSWR is less than 2, and reflection coefficient is less than 0.3.
Description
Technical field
The present invention relates to a kind of antenna applied in ultra-wideband communications more particularly to a kind of ultra-wideband monopole antennas.
Background technique
Ultra wide band (Ultra Wide Band, UWB) technology be a kind of novel short distance high-speed for being concerned at present without
Line communication technology.2 months 2002, Federal Communications Commission (FCC) regulation was permitted UWB technology and is used in civil field, but
It sends power and is lower than -41.3dBm/MHz, the frequency band of 3.1GHz-10.6GHz can be used to be scanned the object of underground and partition wall
Imaging system, automobile collision avoidance radar and ranging and wireless data communication are carried out between household electrical appliance terminal and portable terminal, may be used also
For indoor positioning technologies.
Ultra-wideband antenna and the other mark of general antenna field are big bandwidth of operation.Antenna Operation frequency range meets following
One of two conditions all can be referred to ultra-wideband antenna, and condition is as follows:
1, prescribed bandwidth expression formula is as follows:
In formula, fHFor the upper limit operation frequency of antenna, fLFor the lower limit working frequency of antenna.
2, it is exactly ultra-wideband antenna that bandwidth of operation, which is more than the antenna of 500MHz,.
Antenna is located at the front end in wireless communication system, has and emits and receive electromagnetism wave energy, is wireless communication system
It unites one of most important component.Ultra-wideband antenna has very important effect in ultra-wideband systems, directly restricts ultra wide band
The performance of system.Traditional ultra-wideband monopole antenna is all printed monopole mostly, although printed antenna has at low cost, system
Make the advantages that simple, but the radiation gain of printed antenna is small, H surface radiation out-of-roundness is larger, is not appropriate for for wireless base station
Communication.Existing monopole antenna impedance narrower bandwidth cannot cover UWB frequency range, and cannot use with circuit integration.
Summary of the invention
The technical problem to be solved by the present invention is to, provide a kind of antenna impedance bandwidth be improved significantly, UWB can be covered
Band limits increases the ultra-wideband monopole antenna of aerial radiation intensity.
In order to solve the above technical problems, the technical solution adopted by the present invention is that: the ultra-wideband monopole antenna includes list
Extremely son, metal floor, feedback needle, the feedback needle passes through the metal floor and is connected on the monopole, and is with the feedback needle
Center is provided with a round gap on the metal floor；The monopole is set to above the metal floor, by two
Be vertically connected with, the metal cylinder of diameter not etc. is constituted, top cyclotomy column diameter is greater than lower partial cylinder；The axis of the monopole
It is rectangular step shape to cross sectional periphery side.
Stepped cylinder monopole disclosed in above-mentioned technical proposal is obtained compared to existing monopole, antenna impedance bandwidth
It is obviously improved, UWB band limits can be covered；The design of metal floor can increase aerial radiation intensity；Feed structure has more
Kind, antenna can be used in different equipment, and meet different the needs of using；Based on above-mentioned monopole ultra-wideband antenna, work
3.1GHz-10.6GHz is covered as frequency range, this frequency range is suitable for ultra wide band (UWB) communication system, answers suitable for promoting on a large scale
With voltage standing wave ratio VSWR is less than 2, and reflection coefficient is less than 0.3.
Further improve is that the monopole is connect and fixed using tap structure with the feedback needle；Described
The Teflon medium of cylinder type hollow is provided between monopole and the metal floor as support.
Monopole is connect and is fixed using tap structure with the feedback needle, is facilitated monopole and is fixedly connected with feedback needle；
Using Teflon medium as support.
Further improve is that at the coupling part of the monopole and the feedback needle, the monopole is using empty
Heart tap structure.
Further improve is that dielectric-slab is provided with below the metal floor, and the monopole is located at the gold
The surface of possession plate and the dielectric-slab；The monopole passes through the metal floor and the dielectric-slab by the feedback needle
Microstrip line is connected, the microstrip line is located at the underface of dielectric-slab；Circuit has been routed in the dielectric-slab.
Circuit is routed in this dielectric-slab, realizes integrated, the reduction equipment size of circuit and antenna, the increase device space
Utilization rate；This feeding classification is well-adapted under the trend of present compact apparatus demand, and will not reduce antenna
Performance；FR4 plate can be used in dielectric-slab.
Further improve is that the antenna uses the feed microstrip line, and the microstrip line is printed on the dielectric-slab
In the following, the metal floor is printed on above the dielectric-slab；The metal floor is printing plate.
This printing plate can be used as circuit board, in the back side cloth circuits of printing plate, facilitate the integrated of antenna and circuit board, greatly
The size of big reduction communication equipment, and the performance of antenna is influenced also smaller.
Further improve is that, using bottom feedback sub-miniature A connector feed, the feedback needle passes through the metal floor and is connected to institute
It states on monopole, the outer conductor of the sub-miniature A connector connects the metal floor.
The technical solution is another feed structure, and the design of two kinds of feed structures, antenna can be used to be set in different
It is standby upper, meet different use demands.
Further improve is that the top cyclotomy column length is greater than the lower partial cylinder.
Further improve is that the monopole uses solid cylindrical, copper material or hollow cylindrical copper material
Material.
In order to reduce weight and cost, hollow copper product can be used.
Further improve is that the monopole axial length is 0.29 wavelength of center frequency, the monopole top
Cyclotomy column diameter is 0.16 wavelength of center frequency.
Further improve is that the metal floor shape is round or rectangular or round rectangle.
Detailed description of the invention
It is further described with reference to the accompanying drawing with embodiments of the present invention:
Fig. 1 is existing monopole antenna structural schematic diagram；
Fig. 2 is the schematic diagram of 1 structure of ultra-wideband monopole antenna embodiment of the present invention；
Fig. 3 is the schematic diagram of 2 structure of ultra-wideband monopole antenna embodiment of the present invention；
Surpass when the top view of ultra-wideband monopole antenna, rectangular floor when Fig. 4 (a), 4 (b) are circular metal floor respectively
The top view of wideband monopole sub-antenna；
The frequency response curve of the voltage standing wave ratio of Fig. 5 ultra-wideband monopole antenna of the present invention；
Fig. 6 (a), 6 (b), 6 (c) are ultra-wideband monopole antenna of the present invention respectively in 3.5GHz, 6.5GHz, 10.5GHz frequency
Point E surface radiation directional diagram；
Fig. 7 (a), 7 (b), 7 (c) are ultra-wideband monopole antenna of the present invention respectively in 3.5GHz, 6.5GHz, 10.5GHz frequency
Point H surface radiation directional diagram；
Wherein: 1- monopole；2- metal floor；3- presents needle；4- coaxial connector；5- Teflon medium；6- dielectric-slab；7-
Microstrip line；8- circular metal floor；9- square metal floor.
Specific embodiment
In embodiments of the present invention, the input impedance of antenna is the impedance value of the input terminal presentation of antenna, is inputted for antenna
Hold voltage and current ratio:
Wherein, j is imaginary part unit, i.e.,Rin、XinRespectively input resistance and input reactance, they are respectively corresponded
Active power and reactive power.Active power is dissipated with being lost and radiating two ways, and reactive power then resides near field
Area.
Return loss and voltage standing wave ratio VSWR are two main characteristic parameters for describing impedance bandwidth.Return loss is determined
Justice is the ratio of back wave and incidence wave, and the definition of voltage standing wave ratio is the maximum value of voltage standing wave(VSW) and the ratio of minimum value.Two
The relational expression of person is as follows:
Ultra-wideband monopole antenna in the application is omnidirectional antenna.Generally on two orthogonal principal planes
Two-dimensional directional figure indicate that both principal planes are respectively the face E and the face H, the face E refers to electric field intensity and greatest irradiation direction
The plane at place, the face H refer to the plane where magnetic vector and greatest irradiation direction.
As shown in Figure 1, being existing monopole antenna structure, antenna includes monopole, earth plate and coaxial line.The monopole
Son is an ellipse, and the long axis by choosing different monopoles can achieve Bu Tong frequent bandwidth with short axle.The monopole
Antenna is compared with ultra-wideband monopole antenna of the invention, and monopole size is larger to be not easy to integrate with communication equipment, and ellipse does not have
There is cylindrical easy processing and bandwidth is also relatively narrow.The antenna is emulated with HFSS software, is obtained in 3.4GHz-7GHz work
Making voltage standing wave ratio VSWR in frequency range can be seen that the port resistance when frequency is higher than 7GHz by antenna input impedance less than 2
Anti- real part is greater than 100 Ω, and maximum increases 150 Ω, and imaginary part has also progressively increased to 75 Ω, this causes antenna high band not
It can impedance matching.It finally obtains bandwidth of the antenna VSWR less than 2 and only has 3.6GHz, the entire frequency range of UWB cannot be covered.
Embodiment 1: as shown in Fig. 2, being the side of the ultra-wideband monopole antenna of first form of implementation of the present patent application
Figure, the antenna include monopole 1, metal floor 2, feedback needle 3, and the feedback needle 3 passes through the metal floor 2 and is connected to the monopole
On son 1, and a round gap is provided on the metal floor centered on the feedback needle 3；The monopole 1 is set to institute
The top of metal floor 2 is stated, is vertically connected with by two, the metal cylinder of diameter not etc. is constituted, under top cyclotomy column diameter is greater than
Partial cylinder, top cyclotomy column length are greater than the lower partial cylinder；The axial cross section outer periphery of the monopole 1 is rectangle rank
Hollow copper product, monopole can also be used using solid copper product in order to reduce weight and cost in scalariform, the monopole 1
1 is made of the cylinder that two length and diameters do not wait, this structure can broaden the impedance bandwidth of antenna high frequency.In order to facilitate monopole
Son 1 and the connection and fixation for presenting needle 3 use hollow internal thread structure in the part monopole 1 of connection using tap structure,
It presents 3 shape of needle and uses helicitic texture.In order to realize 50 Ω of antenna input port match and reduce feedback needle 3 diameter, in monopole
Use Teflon (Teflon) medium 5 of a bit of cylinder type hollow as support between son 1 and metal floor 2.Wherein, needle is presented
3, which pass through metal floor 2, is connected on monopole 1, and is provided with a round gap on metal floor 2 centered on presenting needle 3.
Using bottom feedback sub-miniature A connector 4 (i.e. coaxial connector) feed, the feedback needle 3 passes through the metal floor 2 and is connected to the monopole
On 1, the outer conductor of the sub-miniature A connector 4 connects the metal floor 2.The antenna is emulated with HFSS software, antenna is in height
Frequency range port Impedance real and imaginary parts have reduction, broaden the impedance bandwidth of antenna in this way.
Embodiment 2: as shown in figure 3, being the side view of the ultra-wideband monopole antenna of the second embodiment of the present invention, with reality
It applies example 1 and essentially consists in feed structure difference.The ultra-wideband monopole antenna includes monopole 1, dielectric-slab 6, metal floor 2, feedback
Needle 3 and microstrip line 7.Monopole 1 is made of two stair-stepping cylinders, positioned at metal floor 2 and dielectric-slab 6 just on
Side, metal floor 2 are printed on above the dielectric-slab 6, and the metal floor 2 is printing plate, are provided with below metal floor 2
Dielectric-slab 6；Monopole 1 passes through metal floor 2 by feedback needle 3 and dielectric-slab 6 connects microstrip line 7；Centered on presenting needle 3, in gold
Possession plate 2 opens a roundlet above；Microstrip line 7 is located at the underface of dielectric-slab 6；Dielectric-slab 6 uses FR4 plate, and can be with
Circuit is routed in this dielectric-slab 6, is realized the integrated of circuit and antenna, is reduced equipment size, increase the utilization of the device space
Rate.This mode is well-adapted under the trend of present compact apparatus demand, and will not reduce the performance of antenna.
It is bowing for the ultra-wideband monopole antenna of two 2 shapes of different metal floor of the invention respectively such as Fig. 4 (a), 4 (b)
2 shape of metal floor of view, antenna can be chosen according to the requirement of equipment different structure, such as round, rectangular, oval, fillet
Rectangle etc..
Two kinds of embodiments of aforementioned present invention ultra-wideband monopole antenna only change feed structure, to monopole 1
It influences less, to influence the emulation of antenna and test result also little with the size of metal floor 2.Center of antenna frequency is
6.85GHz, 1 top cyclotomy column axial length of monopole are 0.29 wavelength of center frequency, and 1 top cyclotomy column diameter of monopole is
0.16 wavelength of centre frequency, 1 lower part cyclotomy column axial length of monopole are 0.046 wavelength of center frequency, 1 lower part of monopole
Cyclotomy column diameter is 0.068 wavelength of center frequency, and the distance between monopole 1 and metal floor 2 are the 0.041 of center frequency
Wavelength, the diameter of metal floor 2 are 2.74 wavelength of center frequency.
As shown in figure 5, being the frequency response curve of ultra-wideband monopole antenna voltage standing wave ratio VSWR of the present invention, from result
See that VSWR is less than 2 in 3.1GHz-10.6GHz frequency range, antenna-reflected efficiency is greater than 90%.
As shown in Fig. 6 (a), 6 (b), 6 (c), be ultra-wideband monopole antenna of the present invention respectively 3.5GHz, 6.5GHz,
The face 10.5GHz frequency point E is main polarization and Cross polarization pattern.The greatest irradiation direction of antenna is in ultra wide band range, different frequencies
It puts substantially always, and cross polarization level is lower.
As shown in Fig. 7 (a), 7 (b), 7 (c), be ultra-wideband monopole antenna of the present invention respectively 3.5GHz, 6.5GHz,
The face 10.5GHz frequency point H is main polarization and Cross polarization pattern.Antenna is in ultra wide band range, the maximum out-of-roundness of different frequent points
Less than 1.5dB, meet the directional characteristic of omnidirectional antenna.
The face VSWR, E of antenna, the face H directional diagram explanation, antenna meet the application of super broad band radio communication system.
Antenna of the present invention can make day by length, the size of diameter and the ground board size of change monopole 1
Other frequency ranges of line work, meet the requirement of other wireless communication systems, such as wifi, bluetooth.
Above embodiments are only to of the invention for example, those skilled in the art can carry out respectively the present invention
Kind modification and variation is without departing from the spirit and scope of the present invention.In this way, if these modifications and changes of the present invention belongs to this
Within the scope of invention claim and its equivalent technologies, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of ultra-wideband monopole antenna, which is characterized in that include monopole, metal floor, feedback needle, the feedback needle passes through
The metal floor is connected on the monopole, and is provided with a circle on the metal floor centered on the feedback needle
Gap；The monopole is set to above the metal floor, is vertically connected with by two, the metal cylinder structure of diameter not etc.
At top cyclotomy column diameter is greater than lower partial cylinder；The axial cross section outer periphery of the monopole is rectangular step shape.
2. ultra-wideband monopole antenna according to claim 1, which is characterized in that the monopole and the feedback needle use
Tap structure is connected and is fixed；The Teflon that cylinder type hollow is provided between the monopole and the metal floor is situated between
Matter is as support.
3. ultra-wideband monopole antenna according to claim 2, which is characterized in that in the monopole and the feedback needle
At coupling part, the monopole uses cored screw line structure.
4. ultra-wideband monopole antenna according to claim 1, which is characterized in that be provided with below the metal floor
Dielectric-slab, the monopole are located at the surface of the metal floor and the dielectric-slab；The monopole passes through the feedback needle
Microstrip line is connected with the dielectric-slab across the metal floor, the microstrip line is located at the underface of dielectric-slab；It is being given an account of
Circuit has been routed in scutum.
5. ultra-wideband monopole antenna according to claim 4, which is characterized in that the antenna is presented using the microstrip line
Electricity, the microstrip line is printed on the dielectric-slab in the following, the metal floor is printed on above the dielectric-slab；The metal
Plate is printing plate.
6. ultra-wideband monopole antenna according to claim 1, which is characterized in that described using bottom feedback sub-miniature A connector feed
Feedback needle passes through the metal floor and is connected on the monopole, and the outer conductor of the sub-miniature A connector connects the metal floor.
7. ultra-wideband monopole antenna according to claim 1-6, which is characterized in that the top cyclotomy column length
Degree is greater than the lower partial cylinder.
8. ultra-wideband monopole antenna according to claim 1-6, which is characterized in that the monopole is using real
The cylindrical, copper material of the heart or hollow cylindrical, copper material.
9. ultra-wideband monopole antenna according to claim 8, which is characterized in that centered on the monopole axial length
0.29 wavelength of frequency, the monopole top cyclotomy column diameter are 0.16 wavelength of center frequency.
10. ultra-wideband monopole antenna according to claim 9, which is characterized in that the metal floor shape is circle
Or rectangular or round rectangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710452818.0A CN109149079A (en) | 2017-06-15 | 2017-06-15 | Ultra-wideband monopole antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710452818.0A CN109149079A (en) | 2017-06-15 | 2017-06-15 | Ultra-wideband monopole antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109149079A true CN109149079A (en) | 2019-01-04 |
Family
ID=64830092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710452818.0A Pending CN109149079A (en) | 2017-06-15 | 2017-06-15 | Ultra-wideband monopole antenna |
Country Status (1)
| Country | Link |
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| CN (1) | CN109149079A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110474157A (en) * | 2019-08-27 | 2019-11-19 | 南京邮电大学 | A kind of mobile communication frequency range printed monopole antenna |
| CN110518347A (en) * | 2019-08-27 | 2019-11-29 | 南京邮电大学 | A kind of multiband car antenna |
| CN114843759A (en) * | 2022-03-22 | 2022-08-02 | 宁波大学 | Monopole water antenna |
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| EP1542314A1 (en) * | 2003-12-11 | 2005-06-15 | Sony International (Europe) GmbH | Three-dimensional omni-directional monopole antenna designs for ultra- wideband applications |
| CN1862880A (en) * | 2006-03-24 | 2006-11-15 | 中国电子科技集团公司第三十八研究所 | Superwide band single polar antenna |
| CN201408838Y (en) * | 2009-04-29 | 2010-02-17 | 深圳市云海通讯股份有限公司 | ceiling antenna |
| CN102570005A (en) * | 2012-01-02 | 2012-07-11 | 西安电子科技大学 | Wearable combined ultra-wide band antenna |
| CN102570006A (en) * | 2012-01-02 | 2012-07-11 | 西安电子科技大学 | Wearable type ultra-wideband antenna |
| CN103117451A (en) * | 2013-03-04 | 2013-05-22 | 金明涛 | Ultra wide band antenna |
| CN103700932A (en) * | 2013-12-27 | 2014-04-02 | 北京航天时代光电科技有限公司 | Small-sized very-high frequency monopole antenna |
| CN204118265U (en) * | 2014-03-31 | 2015-01-21 | 北京兴科迪科技有限公司 | A kind of GPS and Big Dipper bimodulus ceramic paster antenna and the vehicle of this antenna is installed |
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2017
- 2017-06-15 CN CN201710452818.0A patent/CN109149079A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1542314A1 (en) * | 2003-12-11 | 2005-06-15 | Sony International (Europe) GmbH | Three-dimensional omni-directional monopole antenna designs for ultra- wideband applications |
| CN1862880A (en) * | 2006-03-24 | 2006-11-15 | 中国电子科技集团公司第三十八研究所 | Superwide band single polar antenna |
| CN201408838Y (en) * | 2009-04-29 | 2010-02-17 | 深圳市云海通讯股份有限公司 | ceiling antenna |
| CN102570005A (en) * | 2012-01-02 | 2012-07-11 | 西安电子科技大学 | Wearable combined ultra-wide band antenna |
| CN102570006A (en) * | 2012-01-02 | 2012-07-11 | 西安电子科技大学 | Wearable type ultra-wideband antenna |
| CN103117451A (en) * | 2013-03-04 | 2013-05-22 | 金明涛 | Ultra wide band antenna |
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| CN204118265U (en) * | 2014-03-31 | 2015-01-21 | 北京兴科迪科技有限公司 | A kind of GPS and Big Dipper bimodulus ceramic paster antenna and the vehicle of this antenna is installed |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110474157A (en) * | 2019-08-27 | 2019-11-19 | 南京邮电大学 | A kind of mobile communication frequency range printed monopole antenna |
| CN110518347A (en) * | 2019-08-27 | 2019-11-29 | 南京邮电大学 | A kind of multiband car antenna |
| CN110518347B (en) * | 2019-08-27 | 2020-10-16 | 南京邮电大学 | Multi-band vehicle-mounted antenna |
| CN114843759A (en) * | 2022-03-22 | 2022-08-02 | 宁波大学 | Monopole water antenna |
| CN114843759B (en) * | 2022-03-22 | 2023-04-14 | 宁波大学 | Monopole water antenna |
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Effective date of registration: 20190805 Address after: 45 000 1 15th Floor, Block A1, No. 7 Dongqing Street, Zhengzhou High-tech Zone, Henan Province Applicant after: Locaris Technology Co., Ltd. Address before: 510000 Factory 301, Tian'an Headquarters Center, 555 North Panyu Avenue, Donghuan Street, Panyu District, Guangzhou City, Guangdong Province Applicant before: Hi-Target Positioning Co., Ltd. |
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Application publication date: 20190104 |