CN109687126A - A kind of circular polarization microstrip antenna of quasi- c-type structure - Google Patents
A kind of circular polarization microstrip antenna of quasi- c-type structure Download PDFInfo
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- CN109687126A CN109687126A CN201811527789.0A CN201811527789A CN109687126A CN 109687126 A CN109687126 A CN 109687126A CN 201811527789 A CN201811527789 A CN 201811527789A CN 109687126 A CN109687126 A CN 109687126A
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- 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
- H01Q9/40—Element having extended radiating surface
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Abstract
The present invention relates to a kind of circular polarization microstrip antennas of quasi- c-type structure, wherein, the two sides up and down of dielectric substrate are respectively equipped with top layer radiation metal patch and bottom layer ground sheetmetal layer, the top layer radiation metal patch includes quasi- c-type monopole, L-type band, 1/4 wavelength impedance inverter and microstrip line, the quasi- c-type monopole is opened in lower left, and it is connected with one end of 1/4 wavelength impedance inverter, the other end of 1/4 wavelength impedance inverter is connected with microstrip line, the upper right corner of the quasi- c-type monopole is connected with the L-type band, two sides of the L-type band and the quasi- c-type monopole surround a rectangular apertures；F type patch is posted at the back side of the quasi- c-type monopole, and the F type patch is coplanar with bottom layer ground sheetmetal layer, is provided with perpendicular shape of rectangular ribbon on the left of the bottom layer ground sheetmetal layer；The shape of rectangular ribbon is against the F type patch.The present invention can be efficiently applied in WiMAX system.
Description
Technical field
The present invention relates to wireless communication technology fields, more particularly to a kind of circular polarization microstrip antenna of quasi- c-type structure.
Background technique
In recent years, with the development of Modern wireless communication technology, the demand to miniaturization broadband circular polarized antenna is continuous
Increase.Circular polarized antenna is received significant attention due to can be reduced polarization mismatch and multi-path jamming.Specifically, circular polarisation day
Line can receive any polarized incoming wave, and its radiated wave can also be received by any poliarizing antenna；With rotation direction orthogonality and
Rotation direction reverses when polarized wave is incident on symmetric targets, and the electromagnetic wave of different rotation directions has biggish polarization isolation etc., these advantages
Make its satellite communication, radar, electronic countermeasure and electronic reconnaissance and in terms of have important application.In general, circle
Polarization can be realized by excitation constant amplitude and two kinds of orthogonal modes of resonance of 90 phase differences.However, traditional microstrip antenna is big
There is limited average bandwidth and biggish size more, be unfavorable for the integrated and application of wireless system.Therefore, small-sized to broadband
Changing antenna improve is an important research topic.
Due to the advantages that monopole antenna structure is relatively easy, light-weight, impedance bandwidth is wide, radiation efficiency is high, cause
The concern of many antenna designers.In recent years, it is proposed a kind of unipole antenna variant that can derive circular polarisation, such as
A kind of Y shape unipole antenna with unequal arm is proposed, to generate circular polarisation.Some scholars put forward a kind of while having linear
With the CPW fed monopole antenna of Circular Polarisation, by introducing asymmetric ground connection plate face and inverted L band, may be implemented broadband with
Circular polarisation performance.However, these antenna only has the bandwidth of narrow 3dB and 23% AR bandwidth.Moreover, the size of these antenna
It is relatively large, it is not easy to integrate.Therefore, for antenna designer, the communication size of unipole antenna and setting for AR bandwidth
Meter is still a challenging problem.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of circular polarization microstrip antennas of quasi- c-type structure, can be improved
The performance of antenna.
The technical solution adopted by the present invention to solve the technical problems is: providing a kind of circularly polarization microstrip of quasi- c-type structure
The two sides up and down of antenna, including dielectric substrate, the dielectric substrate are respectively equipped with top layer radiation metal patch and bottom layer ground plate
Metal layer, the top layer radiation metal patch include intending c-type monopole, L-type band, 1/4 wavelength impedance inverter and microstrip line,
The quasi- c-type monopole is opened in lower left, and is connected with one end of 1/4 wavelength impedance inverter, the 1/4 wavelength resistance
The other end of anti-rotation parallel operation is connected with microstrip line, and the upper right corner of the quasi- c-type monopole is connected with the L-type band, the L-type
Two sides of band and the quasi- c-type monopole surround a rectangular apertures；Post F type patch in the back side of the quasi- c-type monopole
Piece, the F type patch is coplanar with bottom layer ground sheetmetal layer, is provided on the left of the bottom layer ground sheetmetal layer perpendicular
Shape of rectangular ribbon；The shape of rectangular ribbon is against the F type patch.
Two sides of the L-type band and the quasi- c-type monopole surround the rectangular apertures of 1mm × 1mm size.
Gap between the F type patch and the top of the quasi- c-type monopole is 1.5mm.
The distance of left margin of the shape of rectangular ribbon apart from dielectric substrate is 6mm.
1/4 wavelength impedance inverter is in elongate rectangular, having a size of 3.5mm × 2mm.
The size of the microstrip line is 2mm × 3mm, and feeding classification uses feed microstrip line.
Beneficial effect
Due to the adoption of the above technical solution, compared with prior art, the present invention having the following advantages that and actively imitating
Fruit: the present invention is made of c-type monopole, the F type patch at the monopole back side and the bottom layer ground sheetmetal layer modified.C-type list
Extremely son can be considered as a straight-flanked ring, open in lower left, and connect L-type band, to excite lower CP mode.Pass through
It is F type patch is coplanar with earth plate and connect elongate rectangular perpendicular to earth plate metal layer, it realizes wide impedance bandwidth, improves simultaneously
The axial ratio bandwidth of antenna needs the demand of anti-interference strong circularly polarised wave when finally meeting antenna transmission wireless wave.Entire antenna
Structure is very simple, and size is small, is readily integrated into many communications applications systems, especially WiMAX system.Simulation result table
It is bright, the antenna -10dB impedance bandwidth be 81.6% (6.2GHz, 4.5-10.7GHz), axial ratio bandwidth AR be 75% (5.4GHz,
4.5-9.9GHz).The present invention breaches the narrow disadvantage of frequency band, has widened application range of the microstrip antenna in this frequency range.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is the return loss schematic diagram of circular polarization microstrip antenna of the present invention；
Fig. 3 is the axis of circular polarization microstrip antenna of the present invention than parameter schematic diagram；
Fig. 4 is the gain parameter schematic diagram of circular polarization microstrip antenna of the present invention.
Specific embodiment
Present invention will be further explained below with reference to specific examples.It should be understood that these embodiments are merely to illustrate the present invention
Rather than it limits the scope of the invention.In addition, it should also be understood that, after reading the content taught by the present invention, those skilled in the art
Member can make various changes or modifications the present invention, and such equivalent forms equally fall within the application the appended claims and limited
Range.
Embodiments of the present invention are related to a kind of circular polarization microstrip antenna of quasi- c-type structure, as shown in Figure 1, including medium
Substrate 1, the two sides up and down of the dielectric substrate 1 are respectively equipped with top layer radiation metal patch and bottom layer ground sheetmetal layer 7.It is described
Top layer radiation metal patch includes quasi- c-type monopole 2, L-type band 3,1/4 wavelength impedance inverter 4 and microstrip line 5, the quasi- C
Type monopole 2 is opened in lower left, and is connected with one end of 1/4 wavelength impedance inverter 4, and 1/4 wavelength impedance turns
The other end of parallel operation 4 is connected with microstrip line 5, and the upper right corner of the quasi- c-type monopole 2 is connected with the L-type band 3, the L-type
Two sides of band 3 and the quasi- c-type monopole 2 surround a rectangular apertures；Post F type in the back side of the quasi- c-type monopole 2
Patch 6, the F type patch 6 is coplanar with bottom layer ground sheetmetal layer 7, the left side of the bottom layer ground sheetmetal layer 7 be provided with
Its vertical shape of rectangular ribbon 8；The shape of rectangular ribbon 8 is against the F type patch 6.
Quasi- c-type monopole in present embodiment can be considered as a straight-flanked ring, open in lower left, the upper right corner connects
It is connected to L-type band, so as to excite lower CP mode.By the way that F type patch is coplanar with bottom layer ground sheetmetal layer, and will
Elongate rectangular band realizes wide impedance bandwidth perpendicular to earth plate metal layer, while improving the axial ratio bandwidth of antenna, final to meet
The demand of anti-interference strong circularly polarised wave is needed when antenna transmission wireless wave.
Entire antenna structure is very simple, and size is small, is readily integrated into many communications applications systems.Wherein medium substrate
Selected material is FR4, relative dielectric constant 4.4, dielectric loss 0.02.A length of L=25mm of medium substrate, width are
W=25mm thickness h=1mm.The specific size parameter of antenna is as shown in table 1.
| Antenna size parameter | Parameter value (mm) | Antenna size parameter | Parameter value (mm) |
| L | 25 | a | 2 |
| W | 25 | b | 2 |
| h | 1 | c | 1 |
| L1 | 2 | W1 | 3 |
| L2 | 3.5 | W2 | 1.2 |
| L3 | 7 | W3 | 8.5 |
| L4 | 17 | W4 | 16 |
| L5 | 2.5 | W5 | 2 |
| L6 | 6.5 | W6 | 2 |
| L7 | 2 | W7 | 9 |
| L8 | 2.5 | W8 | 2 |
| L9 | 4.5 | W9 | 2 |
| Ls | 5.5 | Ws | 9 |
| Lg | 6 | Wf | 4.5 |
| Wt | 6 |
1 antenna basic parameter of table
Since antenna works in free space, in order to make to design Antenna Operation parameter closer to reality, in antenna
After the completion of structural model creation, when analyzing antenna performance parameters using HFSS, need to set the boundary condition of antenna to ideal
Conductor boundary, radiation border surface (i.e. air Cavity surface) are not less than apart from radiator needs, the bottom surface of antenna model medium substrate
Need to be set as ideal boundary, the input port of antenna is set as coplanar lump port excitation, and microstrip feed line is made to be located at port
Center, set rapid frequency-sweeping type for antenna, to its 4GHZ-11GHZ frequency range performance carry out analytical calculation.
The RF signal power of radio transmitter output, is output to transmitting antenna by feeder line, by antenna with electromagnetic wave
It radiate.Load of the antenna as transmitter, it is the radiation of power obtained from transmitter to space, and therefore, antenna will be with
Feed line impedance is matched, the efficiency of matched degree direct influence power transmission.The microstrip feed line of this antenna is located at whole knot
The center of structure top layer, it is closely coupled with top-level metallic patch, when Antenna Operation, microstrip feed line feed-in of the signal by top layer, top layer
The all channel antenna for meeting application requirement is collectively formed with the metal radiation patch and medium substrate of bottom.The circular polarisation master of antenna
There are quasi- c-type monopole and L-type ribbon structure to generate, can make antenna that there is circular polarisation feature well by adjusting the two.Together
When, coupling and realization broadband character coplanar with earth plate by F type patch and c-type monopole.
The present invention emulates the antenna structure using the HFSS full-wave simulation software based on finite element algorithm, antenna
S11 parameter, AR parameter and Gain parameters simulation result it is as shown in Figure 2, Figure 3 and Figure 4.It can be seen from the figure that the antenna
Frequency range of the S11 parameter less than -10dB is 4.5GHz-10.7GHz, and it is real that opposite bandwidth of operation is up to 81.6%, AR parameter
4.5GHz-9.9GHz is showed, for Gain parameter all in 3dB or more in identical bandwidth range, extreme value reaches 5.1dB, S11
The frequency range of parameter completely includes the frequency range of AR, and covers the frequency range of WiMAX work, meets work item in practical applications
Part.The present invention has given full play to the small size of micro-strip paster antenna, low section and is easily integrated, the spies such as wide-band easy to accomplish
Point breaches the relatively narrow disadvantage of frequency range, extends application range of the microstrip antenna in this frequency range.
Claims (6)
1. a kind of circular polarization microstrip antenna of quasi- c-type structure, including dielectric substrate (1), the two sides up and down of the dielectric substrate (1)
It is respectively equipped with top layer radiation metal patch and bottom layer ground sheetmetal layer (7), which is characterized in that the top layer radiation metal patch
Including quasi- c-type monopole (2), L-type band (3), 1/4 wavelength impedance inverter (4) and microstrip line (5), the quasi- c-type monopole
(2) it opens in lower left, and is connected with one end of 1/4 wavelength impedance inverter (4), 1/4 wavelength impedance inverter
(4) the other end is connected with microstrip line (5), and the upper right corner of the quasi- c-type monopole (2) is connected with the L-type band (3), institute
Two sides for stating L-type band (3) and the quasi- c-type monopole (2) surround a rectangular apertures；The quasi- c-type monopole (2)
F type patch (6) is posted at the back side, and the F type patch (6) is coplanar with bottom layer ground sheetmetal layer (7), the bottom layer ground sheetmetal
Perpendicular shape of rectangular ribbon (8) are provided on the left of layer (7)；The opposite F type patch (6) of the shape of rectangular ribbon (8).
2. the circular polarization microstrip antenna of quasi- c-type structure according to claim 1, which is characterized in that the L-type band (3)
The rectangular apertures of 1mm × 1mm size are surrounded with two sides of the quasi- c-type monopole (2).
3. the circular polarization microstrip antenna of quasi- c-type structure according to claim 1, which is characterized in that the F type patch (6)
Gap between the top of the quasi- c-type monopole (2) is 1.5mm.
4. the circular polarization microstrip antenna of quasi- c-type structure according to claim 1, which is characterized in that the shape of rectangular ribbon (8)
The distance of left margin apart from dielectric substrate (1) is 6mm.
5. the circular polarization microstrip antenna of quasi- c-type structure according to claim 1, which is characterized in that 1/4 wavelength impedance
Converter (4) is in elongate rectangular, having a size of 3.5mm × 2mm.
6. the circular polarization microstrip antenna of quasi- c-type structure according to claim 1, which is characterized in that the microstrip line (5)
Having a size of 2mm × 3mm, feeding classification uses feed microstrip line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811527789.0A CN109687126B (en) | 2018-12-13 | 2018-12-13 | Circularly polarized microstrip antenna with quasi-C-shaped structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811527789.0A CN109687126B (en) | 2018-12-13 | 2018-12-13 | Circularly polarized microstrip antenna with quasi-C-shaped structure |
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| Publication Number | Publication Date |
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| CN109687126A true CN109687126A (en) | 2019-04-26 |
| CN109687126B CN109687126B (en) | 2021-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811527789.0A Active CN109687126B (en) | 2018-12-13 | 2018-12-13 | Circularly polarized microstrip antenna with quasi-C-shaped structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110661091A (en) * | 2019-10-09 | 2020-01-07 | 成都航空职业技术学院 | Small-size multiband broadband antenna |
| CN114865298A (en) * | 2022-05-31 | 2022-08-05 | 集美大学 | Plane ultra-wideband circularly polarized antenna |
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| CN107369894A (en) * | 2017-06-12 | 2017-11-21 | 华南理工大学 | A kind of inclined ellipse monopole Broadband circularly polarized antenna |
| CN207282718U (en) * | 2017-09-25 | 2018-04-27 | 华南理工大学 | A kind of wide band circularly polarized slot antenna |
| CN108110415A (en) * | 2017-12-14 | 2018-06-01 | 东华大学 | A kind of compact double frequency round polarized microstrip antenna |
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| CN106816701A (en) * | 2017-01-16 | 2017-06-09 | 西安电子科技大学 | Double frequency round polarized microstrip antenna |
| CN107369894A (en) * | 2017-06-12 | 2017-11-21 | 华南理工大学 | A kind of inclined ellipse monopole Broadband circularly polarized antenna |
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| CN108110415A (en) * | 2017-12-14 | 2018-06-01 | 东华大学 | A kind of compact double frequency round polarized microstrip antenna |
| CN207587968U (en) * | 2017-12-21 | 2018-07-06 | 福州大学 | A kind of inverted L-shaped minor matters loading broad-band circular polarisation slot antenna |
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|---|
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110661091A (en) * | 2019-10-09 | 2020-01-07 | 成都航空职业技术学院 | Small-size multiband broadband antenna |
| CN114865298A (en) * | 2022-05-31 | 2022-08-05 | 集美大学 | Plane ultra-wideband circularly polarized antenna |
| CN114865298B (en) * | 2022-05-31 | 2024-06-07 | 集美大学 | Planar ultra-wideband circularly polarized antenna |
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| CN109687126B (en) | 2021-05-11 |
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