CN104882676B - A kind of low-frequency ultra-wideband plane omnidirectional antenna - Google Patents
A kind of low-frequency ultra-wideband plane omnidirectional antenna Download PDFInfo
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- CN104882676B CN104882676B CN201510222461.8A CN201510222461A CN104882676B CN 104882676 B CN104882676 B CN 104882676B CN 201510222461 A CN201510222461 A CN 201510222461A CN 104882676 B CN104882676 B CN 104882676B
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- 239000002184 metal Substances 0.000 claims abstract description 54
- 229910052751 metal Inorganic materials 0.000 claims abstract description 54
- 239000000758 substrate Substances 0.000 claims abstract description 19
- 230000005855 radiation Effects 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims 1
- 239000010931 gold Substances 0.000 claims 1
- 229910052737 gold Inorganic materials 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 10
- 230000005540 biological transmission Effects 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000005404 monopole Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000002847 impedance measurement Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000010415 tropism Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses a kind of low-frequency ultra-wideband plane omnidirectional antennas.It includes:One piece of medium substrate, metal radiation patch, metal ground plate and loading resistor.Medium substrate material is FR 4, including first surface and the second surface opposite with first surface；Metal radiation patch is set to the first surface of medium substrate, and metal ground plate and loading resistor are set on the second surface of medium substrate；Metal radiation patch is made of a U-shaped paster and disk；Between U-shaped paster end and gradual change microstrip feed line top, it is connected by a up-side down triangle metal patch；Metal ground plate is a rectangle frame metal patch, a trapezoidal patch and two strip patches is then added inside metal rectangular frame, and be loaded with identical resistance at the both ends of metal rectangular frame；Entire antenna passes through 50Coaxial line is fed.A kind of low-frequency ultra-wideband plane omnidirectional antenna provided by the invention, compact-sized, bandwidth range is big, low frequency omni-directional is good.
Description
Technical field
The invention belongs to microstrip antenna fields, are related to a kind of novel plane ultra-wideband Antenna Design, which covers
VHF and uhf band are covered, there is good omnidirectional's characteristic.
Background technology
In Modern Communication System, important component of the antenna as system, there has been proposed higher and higher broadbands
The requirement changed and minimized.The design of antenna must consider bandwidth of operation, the unit for electrical property parameters such as system gain and structure
The various aspects factors such as compact, miniaturization.The wideband omnidirectional antenna being operated at this stage in VHF and uhf band is mainly back taper day
Line, discone antenna, sleeve antenna etc..This few class antennas bulk if being operated in VHF frequency ranges is larger.And in numerous antennas
In, plane single pole sub antenna has the characteristics that high gain, size are small and is studied and be applied to by people the fields UWB extensively.Therefore, will
Planar microstrip monopole antenna is applied to VHF and uhf band is of great significance.
In plane single pole sub antenna, by antenna corner cut, using round or ellipse monopole and the feedback of gradual change
The methods of electric wire can effectively widen the bandwidth of antenna.In addition, different feeding classifications can also increase the work frequency of antenna
Band.During this period, the feeding classification of co-planar waveguide (CPW) feed is suggested and is applied to the fields UWB, acquirement it is more satisfactory
As a result.The feeding classification fed by co-planar waveguide (CPW), someone devise a super-wide-band flat antenna, which is base
It is formed in this thinking of planarization of discone antenna, antenna is by the monopole patch of ellipse, gradual change microstrip feed line and trapezoidal
Ground forms.Antenna is produced on 1.524mm, and on the substrate of dielectric constant 3.48, size is 0.19 λ *, 0.16 λ, and λ is that antenna exists
Wavelength when 0.41GHz.After optimized dimensions, the Impedance measurement bandwidth of the antenna is more than 21:1, covering frequence range 0.41-
8.86GHz, and there is good omnidirectional radiation characteristic.In addition, someone has devised a kind of novel carrier-borne ultrashort wave wide antenna,
It is ellipse fitting structure first to use the asymmetric dipole form of plane, upper radiating surface another day, and lower radiating surface is that exponential fade is trapezoidal
Structure.The operating frequency of antenna ranging from 30-400MHz, 13.3:In 1 frequency band, the voltage standing wave ratio of antenna is less than 2.9,
Water product face pattern distortion degree is less than 3.8dB, and the height of antenna is 0.326 λ, wavelength when λ is antenna 30MHz.
Invention content
The purpose of the present invention is：In order to overcome the problems, such as existing VHF/UHF beamwidths of antenna narrow range, a kind of bandwidth is provided
Range is wide, the preferable plane microstrip antenna design of omnidirectional's performance.By loading resistor, antenna return loss is most less than -10db
Low frequency has reached 30MHz, while having accomplished that size is small as far as possible.
The technical scheme is that：A kind of low-frequency ultra-wideband plane omnidirectional antenna, including:One block of medium substrate, metal
Radiation patch, metal ground plate and loading resistor；Medium substrate material is FR-4, including first surface and opposite with first surface
Second surface；Metal radiation patch is set to the first surface of medium substrate, and metal ground plate and loading resistor are set to Jie
On the second surface of matter substrate；
The metal radiation patch is made of a U-shaped paster and disk；Disk is connected in U-shaped patch groove, in U-shaped
Between patch end and gradual change microstrip feed line top, it is connected by a up-side down triangle metal patch 1；
The metal ground plate be a rectangle frame metal patch, then added inside metal rectangular frame a trapezoidal patch and
Two strip patches 2,3, trapezoidal patch are set to the lower end inside metal rectangular, and two strip patches 2,3 are separately connected
Upper edge inside metal rectangular, and respectively one is loaded at two lower ends of metal rectangular frame and trapezoidal patch footing
Identical resistance load resistance；Distributing point feed point are located at antenna bottom end.
The medium substrate size is the λ of 0.12 λ × 0.1, and thickness h ＜ ＜ λ, λ are the wave of Antenna Operation bandwidth minimum point
It is long.
It is described between U-shaped paster end and gradual change microstrip feed line top, add up-side down triangle metal patch 1, Ke Yiyou
Widen to effect the bandwidth of antenna high frequency section.
The minimum of low antenna, can effectively drop in the loading resistor load resistance on metal ground plate
Frequency point.
Described is added two strip patches 2,3 inside metal rectangular frame, can reduce the minimum frequency point of antenna.
Inventive antenna is plane single pole sub antenna, and λ is the wavelength of Antenna Operation bandwidth minimum point, and low-limit frequency is
30MHz。
Advantageous effect
The present invention devises a plane microstrip antenna for being operated in VHF and uhf band.The Research of Antenna Polarization is vertical
Polarization, by loading resistor, its bandwidth of operation is 30-1000MHz.It is measured by experiment the results show that antenna has well entirely
Tropism.When antenna is operated in 100MHz, antenna has maximum gain 2.8dBi.
Description of the drawings
Fig. 1 is schematic structural view of the invention.
Fig. 2 (a) is pictorial diagram of the present invention, is (b) feed placement pictorial diagram of the present invention, is (c) loading resistor position of the present invention
Set pictorial diagram.
The simulation parameter figure of return loss S11 when Fig. 3 is the presence or absence of present invention inverted triangle structure.
Fig. 4 is the simulated return loss S11 figures that the present invention did not loaded and loaded different resistance.
Fig. 5 is the artificial echo being added inside the metal floor rectangle frame of the present invention under two strip patch different lengths
S11 figures are lost.
Fig. 6 is that present invention emulation and the return loss S11 of actual measurement scheme.
Fig. 7 is the actual measurement gain diagram of the present invention.
Fig. 8 be the present invention in (a) 30MHz, (b) 500MHz and (c) 900MHz the emulation of H-plane and E-plane and
Survey directional diagram.
Specific implementation mode
As depicted in figs. 1 and 2, it is a kind of low-frequency ultra-wideband plane omnidirectional antenna provided by the invention comprising:One piece of Jie
Matter substrate, metal radiation patch, metal ground plate and loading resistor.Medium substrate material be FR-4, including first surface and with
The opposite second surface of first surface；Metal radiation patch is set to the first surface of medium substrate, metal ground plate and load
Resistance is set on the second surface of medium substrate；Antenna is fed by 50 Ω coaxial lines, distributing point (feed point)
At the 0.5cm of antenna bottom end, such as Fig. 2 (b).
The metal radiation patch is made of a U-shaped paster and disk；Disk is connected in U-shaped patch groove, in U-shaped
Between patch end and gradual change microstrip feed line top, it is connected by a up-side down triangle metal patch 1；
The metal ground plate be a rectangle frame metal patch, then added inside metal rectangular frame a trapezoidal patch and
Two strip patches 2,3, trapezoidal patch are set to the lower end inside metal rectangular, and two strip patches 2,3 are separately connected
Upper edge inside metal rectangular, and respectively identical resistance (load is loaded at the both ends of metal rectangular frame
Resistance), such as Fig. 2 (c)；
As shown in figure 3, being a kind of low-frequency ultra-wideband plane omnidirectional antenna provided by the invention in U-shaped paster end and gradual change
Whether there is or not the simulation parameter figure of return loss S11 when inverted triangle structure 1 between microstrip feed line top, having down as can be seen from this figure
When three-legged structure, antenna after 500MHz return loss S11 below -10dB.
As shown in figure 4, being that a kind of low-frequency ultra-wideband plane omnidirectional antenna provided by the invention does not add on metal ground plate
The simulated return loss S11 figures of different resistance (load resistance) are carried and load, as can be seen from this figure antenna lowest frequency
70MHz when never loading resistor is put, the 30MHz after 150 Ω of load is had decreased to, the beamwidth of antenna is obviously widened.
As shown in figure 5, being a kind of low-frequency ultra-wideband plane omnidirectional antenna provided by the invention in antenna metal floor rectangle
The simulated return loss S11 figures under two strip patches 2,3 different lengths are added inside frame, patch is long as can be seen from this figure
Degree is different, and the minimum frequency point of antenna will change.
As shown in fig. 6, the emulation for the present invention and actual measurement return loss S11 figure, this low frequency ultra-wide as can be seen from this figure
Service frequency range with plane omnidirectional antenna is range from 30MHz to 1000MHz.
As shown in fig. 7, for the present invention actual measurement gain diagram, as can be seen from this figure antenna gain in 30MHz it is minimum-
19.3dBi；In 100MHz, gain is up to 2.8dBi.
As shown in figure 8, for the directional diagram of inventive antenna, the width of each concentric circles represents 5dB, as can be seen from this figure
Antenna has good omni-directional in low frequency.
In directional diagram and the gain for measuring antenna, then by double antenna method, obtained with fries transmission formula, specifically
Steps are as follows：
PTFor transmission power, PRTo receive power, GTFor transmitter antenna gain (dBi), GRFor receiving antenna gain, d is two antennas
The distance between.Formula is obtained after abbreviation：
(PR,dB-lR,dB)-(PT,dB+lT,dB)=GT,dB+GR,dB-20log10f-20log10d+147.56 (2)
1. setting signal generator sends out frequency f, transmission power PT；
2. by swearing that net measures the loss l of transmission line between transmitting antenna and signal sourceT,dB, between reception antenna and arrow net
The loss l of transmission lineR,dB；
3. by the antenna face as 2, ensure the distance between antenna d in far field.Measure the power that arrow net receives
PR；
4. according to formula (2), G is enabledT,dB=GR,dBObtain gain G when 2 same antenna faces；
5. keeping reception antenna motionless, transmitting antenna is rotated into θ angles, measures the power P that arrow net receivesRθ；
6. according to formula (2), G, PT, PRθ, lT,dB, lR,dBIt substitutes into, calculates the increasing of reception antenna rotation θ angle aft antennas
Beneficial Gθ；
7. repeating step 4, the gain G under different angle θ is calculatedθ, obtain the directional diagram of antenna.Find out maximum value Gθmax；
8. change sends out frequency f, step 3-8 is repeated, the maximum value G of gain under different frequency is obtainedθmax, obtain antenna
Gain diagram.
This low-frequency ultra-wideband plane omnidirectional antenna can be used as a ultra-wideband antenna to be applied on vehicle-mounted and carrier-borne, together
When, due to the flatness of its structure so that antenna has good conduct at hidden aspect.In addition, the antenna can also be used for it is various
Wireless telecom equipment.
Claims (1)
1. a kind of low-frequency ultra-wideband plane omnidirectional antenna, which is characterized in that including:One piece of medium substrate, metal radiation patch, gold
Belong to earth plate and loading resistor；Medium substrate material is FR-4, including first surface and the second surface opposite with first surface；
Metal radiation patch is set to the first surface of medium substrate, and metal ground plate and loading resistor are set to the second of medium substrate
On surface；
The metal radiation patch is made of a U-shaped paster and disk, and disk is connected in U-shaped patch groove, in U-shaped paster
Between end and gradual change microstrip feed line top, it is connected by a up-side down triangle metal patch (1)；
The metal ground plate is a rectangle frame metal patch, and a trapezoidal patch and two are then added inside metal rectangular frame
Strip patch (2,3), trapezoidal patch are set to the lower end inside metal rectangular, and two strip patches (2,3) are separately connected
Upper edge inside metal rectangular, and respectively one is loaded at two lower ends of metal rectangular frame and trapezoidal patch footing
Identical resistance load resistance；Distributing point feed point are located at antenna bottom end；
The medium substrate size is the λ of 0.12 λ × 0.1, and thickness h ＜ ＜ λ, λ are the wavelength of Antenna Operation bandwidth minimum point；
Between U-shaped paster end and gradual change microstrip feed line top, add up-side down triangle metal patch (1), to widen antenna high frequency
Partial bandwidth；
The loading resistor load resistance on metal ground plate, effectively reduce the minimum frequency point of antenna；
It is described that two strip patches (2,3) are added inside metal rectangular frame, reduce the minimum frequency point of antenna；
The antenna is plane single pole sub antenna；
λ low-limit frequencies are 30MHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510222461.8A CN104882676B (en) | 2015-05-04 | 2015-05-04 | A kind of low-frequency ultra-wideband plane omnidirectional antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510222461.8A CN104882676B (en) | 2015-05-04 | 2015-05-04 | A kind of low-frequency ultra-wideband plane omnidirectional antenna |
Publications (2)
| Publication Number | Publication Date |
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| CN104882676A CN104882676A (en) | 2015-09-02 |
| CN104882676B true CN104882676B (en) | 2018-08-24 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109149098A (en) * | 2018-10-10 | 2019-01-04 | 江苏中科智睿物联网科技有限公司 | A kind of pole wide-band printing unipole antenna |
| CN111048888B (en) * | 2019-12-13 | 2021-12-31 | 惠州市德赛西威汽车电子股份有限公司 | Vehicle-mounted 5G antenna structure and vehicle-mounted shark fin |
| CN111211415B (en) * | 2020-03-09 | 2022-02-01 | 西南交通大学 | Miniaturized ultra wide band microstrip antenna and circuit board assembly |
| CN111276808A (en) * | 2020-03-12 | 2020-06-12 | 南京理工大学 | Omnidirectional ultra-wideband antenna |
| CN111555022A (en) * | 2020-04-23 | 2020-08-18 | 天津大学 | Single trapped wave plane printing ultra wide band antenna |
| CN112736420A (en) * | 2020-10-15 | 2021-04-30 | 天津津航计算技术研究所 | Resistance-loaded Klopfenstein gradient profile ultra-wideband antenna |
| CN113410633B (en) * | 2021-06-18 | 2022-03-29 | 大连理工大学 | Dual-polarization ultra-wideband flexible microstrip patch antenna |
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| SG148064A1 (en) * | 2007-05-25 | 2008-12-31 | Sony Corp | Ultra-wideband monopole antenna |
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