CN107978855B - Wideband monopole microstrip antenna - Google Patents
Wideband monopole microstrip antenna Download PDFInfo
- Publication number
- CN107978855B CN107978855B CN201711075428.2A CN201711075428A CN107978855B CN 107978855 B CN107978855 B CN 107978855B CN 201711075428 A CN201711075428 A CN 201711075428A CN 107978855 B CN107978855 B CN 107978855B
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- China
- Prior art keywords
- radiation patch
- arc notch
- earth plate
- microstrip antenna
- dielectric substrate
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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
- 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
- H01Q9/40—Element having extended radiating surface
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- Waveguide Aerials (AREA)
Abstract
The present invention provides a kind of wideband monopole microstrip antenna, mainly solve the problems, such as that traditional monopole antenna frequency band is narrow and three-dimensional structure is complicated.It includes dielectric substrate (1), feeder line (2), radiation patch (3), high-frequency joint (4) and earth plate (5).Radiation patch (3) uses long axis in the elliptical shape of vertical direction, the front end of the radiation patch is equipped with impedance matching and adjusts section (6), earth plate (5) is by two orthogonal rectangular metal plates (51,52) it forms, the center position of two rectangle region relative edges is carved with arc notch (7) and (8) respectively, radiation patch (3) upright projection on dielectric substrate bottom surface is located at the front of arc notch (8), and covers arc notch (7).The present invention can cover two wave bands of S and C, and working band range is 1.62GHz-8.28GHz, can be used as wideband wireless communication, detection or monitor the microwave radiation of system and receive front end antenna.
Description
Technical field
The invention belongs to antenna technical field, it is logical to can be used as broadband wireless for especially a kind of broad frequency micro-band unipole antenna
Letter, detection or monitoring system.
Background technique
Currently, with the development of wireless communication, what the increase of required transmitted data amount and message transmission rate improved is wanted
Ask increasingly prominent, wireless telecom equipment constantly develops to front end, and requirement of the equipment for broadband also increasingly increases, so that super
Broadband UWB is applied in microwave system design by attention.Simultaneously as a large amount of frequency ranges are used for different purposes, therefore make
Obtaining space electromagnetic environment becomes extremely complex, therefore is detected and monitored to space electromagnetic environment in broad frequency range and become
It is very necessary.The FCC FCC of definition according to to(for) ultra wide band UWB, absolute bandwidth are greater than 500MHz or opposite
Equipment of the bandwidth on -10dB greater than 20% can meet the requirement of this definition standard.In business correspondence, frequency range tool is commonly used
Body includes: GSM, WLAN and WiMAX three classes.The wherein frequency range that GSM is used are as follows: 1.710GHz-1.755GHz/1.805GHz-
1.850GHz；The frequency range that WLAN is used are as follows: 2.4GHz-2.484GHz, 5.15GHz-5.35GHz and 5.725GHz-5.825GHz；
The frequency range that WiMAX is used are as follows: 2.5GHz-2.69GHz, 3.4GHz-3.69GHz and 5.25GHz-5.85GHz.In order to meet application
It needs, various antenna front ends are studied.But general traditional monopole antenna structure, the single mode of resonance design used due to it
Or multi-layer three-dimension stereochemical structure, such as inverted L shape, reversed F-typed structure type, so that there are a major defects for the radiation characteristic of antenna
It is that or whole frequency ranges cannot be covered or three-dimensional structure is excessively complicated.To solve the above-mentioned problems, used alternative
In scheme, micro-strip planar structure, convenient for integrating in systems on carrier platform, is easy to batch machining, life since its volume is light
It produces.But existing microstrip antenna structure, due to the constraint of its own design form and frequency characteristic, still remaining it cannot be effective
Meet the requirement applied in broadband or ultra wide band.
Summary of the invention
The object of the invention is that in view of the above shortcomings of the prior art, a kind of wideband monopole microstrip antenna is proposed, to mention
The operating frequency range of high antenna simplifies antenna structure, and the broadband properties for meeting covering two frequency ranges of S and C in practical application are wanted
It asks.
To achieve the above object, microstrip antenna provided by the invention includes: that dielectric substrate, feeder line, radiation patch, high frequency connect
Head, earth plate and impedance matching adjust section, it is characterised in that radiation patch uses elliptical shape of the long axis in vertical direction, impedance
Matching adjusts the front end that radiation patch is arranged in section, and earth plate is made of two orthogonal rectangular metal plates, two squares
It is carved with arc notch respectively on shape metal plate.
Preferably, the radiation patch is the oval radiator of a long axis vertically.
Preferably, the arc notch is located at two sides of face among vertical earth plate and horizontal grounding plate
Center position.
Preferably, upright projection of the radiation patch on dielectric substrate bottom surface is located at horizontal grounding plate arc notch
Front, and cover vertical earth plate arc notch.
Preferably, it is rectangle that the impedance matching, which adjusts section, it is placed in the front end of upper surface radiation patch.
Preferably, the operating frequency range is 1.62GHz-8.28GHz, two wave bands of S and C can be covered.
The present invention has the advantages that
1) elliptical shape of the present invention due to radiation patch using long axis in vertical direction, the tool compared with round or other figures
There is more freedom, and different directions, various sizes of resonant excitation mode can be formed in broadband, to be conducive to broadband
The realization of excitation.
2) present invention adjusts section due to being provided with impedance matching at one in the front end of radiation patch, is conducive to meet antenna and sets
The appropriate adjusting requirement for needing to carry out because impedance operator is caused to change for the factors such as mismachining tolerance during meter and after processing.
3) present invention is due to forming earth plate using two orthogonal rectangular metal plates, so that upper and lower surfaces are having
The electromagnetism weak coupling form for being advantageously implemented broadband character is formd while having good feed, and using two earth plates not
Broadband grounding characteristics are realized with the superposition improvement of frequency range grounding characteristics.
4) present invention due on the positive opposite side of above-mentioned two pieces of earth plates center position etch two arc notch knots respectively
Structure is constituted by way of earth plate and is coupled in arc notch region at two by this so that electromagnetic wave is under the excitation of elliptic radiation patch
With ground structure, matching adjustment effect not only each served as to the different frequency range of elliptic radiation patch wide-band excitation, and to it is high,
Low-frequency range both ends are respectively formed Electromagnetic Coupling Characteristic and play improvement frequency characteristic, to broaden bandwidth.
The antenna structure is not only simple in form in geometry, but also can work in the width of 1.62GHz-8.28GHz
Frequency band, the frequency band are greater than 5 frequencys multiplication, have good frequency characteristic.
Detailed description of the invention
Fig. 1 is antenna face structural schematic diagram of the invention；
Fig. 2 is antenna structure schematic diagram of the invention；
Fig. 3 is antenna side structure schematic view of the invention；
Fig. 4 is antenna standing wave-frequency characteristic curve diagram of the invention.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
Referring to FIG. 1, FIG. 2 and FIG. 3, the present invention includes dielectric substrate 1, radiation patch 3, high-frequency joint 4 and earth plate 5.It should
For the etching of radiation patch 3 in the front of dielectric substrate 1, shape is ellipse of the long axis in vertical direction, and elliptical axis ratio is 0.85,
And central symmetry, and connect by microstrip feed line 2 with the center conductor of high-frequency joint 4, the front end of radiation patch 3 is etched with impedance
Adjust section 6.Earth plate 5 etches at the back side of dielectric substrate 1, and the earth plate 5 is by upper and lower two orthogonal rectangular metals 51
With 52 compositions, in the center position of the two rectangle regions relative edge, it is carved with arc notch 7 and 8 respectively, wherein arc notch 7
Positioned at the center of the lower edge L1 of vertical earth plate 51, depth D1 is the 1/9.50 of the vertical earth plate height H1,
Width W1 is the 1/2.89 of the vertical ground connection board width L1；Arc notch 8 is located at the center of the upper edge L2 of horizontal grounding plate 52
Position, depth D2 are the 1/9.00 of horizontal grounding plate height H2, and width W2 is the 1/2.02 of horizontal grounding board width L2.
The ellipse of the upright projection on dielectric substrate bottom surface of radiation patch 3 is located at the front of arc notch 8, and covers arc notch 7, high
The outer conductor of frequency connector 4 is grounded in lower end and the welding of earth plate 52.
The radiation patch 3 of this example is set radiation patch that is, on the basis of original circular design using elliptic design
It is calculated as ellipse, as follows with circular corresponding schematic relationships:
Wherein: x and y respectively indicates two mutually orthogonal geometry dimensions, and R indicates that radius of circle, a indicate axis ratio.
The radiation patch 3 can be formed on the oval direction y than round more radiation modes in different frequency, and then
To the radiation characteristic with wider working band.
The positive opposite side L1 of vertical earth plate 51 and the positive opposite side L2 of horizontal grounding plate 52 are located at radiation patch in bottom surface of antenna
Lower section, since axisymmetricly structure, the center on this two sides influence the impedance operator that antenna is fed prominent the antenna
Out, by etching arc notch 7 and the etching arc notch 8 on L2 on L1, the gradual change feature presented using its structure is led to
It crosses and adjusts the geometric parameters of the two arc notch 7 and 8 to obtain ideal broadband Feedback current.
For the ease of the debugging after designing and processing, section is adjusted in the impedance operator of 3 front ends of radiation patch setting rectangle
6, by adjusting radiation patch 3 and adjusting set a distance between section 6, realize the fine tuning to impedance.
The production process of this antenna is as follows:
Select a monolith with a thickness of 0.8mm, the FR4 rectangular dielectric substrate that dielectric constant is 4.4, upper and lower faces difference
Covering has high conductivity metal layer, such as layers of copper.Microstrip feed line 2, oval 3 and of radiation patch are etched upper surface is bottom-up
Impedance matching adjusts section 6；Go out two pieces of orthogonal ground plate areas 51 and 52 in the back-etching of dielectric substrate 1 again；It is hanging down
The lower edge on direct floor 51 etches arc notch 7 again, and etches arc notch again in the upper edge of horizontal grounding plate 52
8.The antenna structure front end ellipsoidal structure part is spoke side, is connect by feeding line portion with rear end microwave system.Feeder line end
Mouth is matched according to 50 ohm of general standards.
Since the Antenna Operation is in broadband range, realize that preferred plan of the invention is with two-sided high conductivity gold
The general high frequency laminate for belonging to coating is material, using the high-precision lithographic technique in the manufacture of circuit instrument and equipment, such as photoetching skill
Technology is covered on art, high conductivity metal surface, such as plating, spray technique and infrastructure device production, and work in-process should be kept
Degree of precision.
Design layout structure of the invention can directly be charted by CAD software or professional electromagnetic simulation software export CAD
The mode of model is to make a plate and for processing.
Standing wave-frequency characteristic of inventive antenna is as shown in figure 4, the antenna can effectively work as can be seen from Figure 4
In the broadband of 1.62GHz-8.28GHz, and standing-wave ratio meets the general of broadband wireless communications, detection or monitoring and wants less than 2
It asks.
Above description is only example of the present invention, does not constitute any limitation of the invention, it is clear that for
It, all may be without departing substantially from the principle of the invention, structure after having understood the content of present invention and principle for one of skill in the art
In the case where, carry out various modifications and change in form and details, but these modifications and variations based on inventive concept
Still within the scope of the claims of the present invention.
Claims (7)
1. a kind of wideband monopole microstrip antenna, including dielectric substrate (1), feeder line (2), radiation patch (3), high-frequency joint (4),
Earth plate (5) and impedance matching adjust section (6), which is characterized in that radiation patch (3) uses long axis in the ellipse of vertical direction
Shape, impedance matching adjust section (6) setting in the front end of radiation patch (3), and earth plate (5) etching, should at the back side of dielectric substrate 1
Earth plate (5) is made of upper and lower two orthogonal rectangular metals (51) and (52), in the two rectangle regions relative edge
At heart position, it is carved with arc notch (7) and (8) respectively, wherein arc notch (7) is located at the lower edge L1 of vertical earth plate (51)
Center, the ellipse of radiation patch (3) upright projection on dielectric substrate bottom surface is located at the front of arc notch (8), and
It covers arc notch (7), the outer conductor of high-frequency joint (4) is grounded in lower end and earth plate (52) welding.
2. microstrip antenna according to claim 1, it is characterised in that radiation patch (3) be a long axis vertically
Oval radiator.
3. microstrip antenna according to claim 2, it is characterised in that the axis ratio of oval radiator is 0.85, and center pair
Claim.
4. microstrip antenna according to claim 1, it is characterised in that it is following that arc notch (7) is located at vertical earth plate (51)
Along the center of L1, depth D1 is the 1/9.50 of the vertical earth plate height H1, and width W1 is that the vertical earth plate is wide
Spend the 1/2.89 of L1.
5. microstrip antenna according to claim 1, it is characterised in that arc notch (8) is located at horizontal grounding plate (52) top
Along the center of L2, depth D2 is the 1/9.00 of horizontal grounding plate height H2, and width W2 is horizontal grounding board width
The 1/2.02 of L2.
6. microstrip antenna according to claim 1, which is characterized in that it is rectangle that impedance matching, which adjusts section (6), is placed in
The front end of surface emissivity patch (3).
7. microstrip antenna according to claim 1, which is characterized in that operating frequency range 1.62GHz-8.28GHz, energy
Enough cover two wave bands of S and C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711075428.2A CN107978855B (en) | 2017-11-06 | 2017-11-06 | Wideband monopole microstrip antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711075428.2A CN107978855B (en) | 2017-11-06 | 2017-11-06 | Wideband monopole microstrip antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107978855A CN107978855A (en) | 2018-05-01 |
| CN107978855B true CN107978855B (en) | 2019-10-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711075428.2A Active CN107978855B (en) | 2017-11-06 | 2017-11-06 | Wideband monopole microstrip antenna |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100962930B1 (en) * | 2008-09-01 | 2010-06-10 | 강원대학교산학협력단 | Ultra-wide-band antenna having quarter-slot and method for manufacturing the same |
| CN204809390U (en) * | 2015-06-23 | 2015-11-25 | 中国计量学院 | Oval microstrip antenna of breach |
| CN205069864U (en) * | 2015-10-27 | 2016-03-02 | 南开大学 | Three frequency microstrip antenna based on defect ground structure frame is irregular oval cyclic annular |
| CN205231238U (en) * | 2015-12-15 | 2016-05-11 | 深圳市金溢科技股份有限公司 | Vehicle positioning system and basic station unit |
| CN205248439U (en) * | 2015-11-20 | 2016-05-18 | 吉林医药学院 | Two ring shape plane monopole antenna of ultra wide band |
| CN106252859A (en) * | 2016-08-27 | 2016-12-21 | 河北工业大学 | A kind of body surface communication antenna of flexible substrates |
-
2017
- 2017-11-06 CN CN201711075428.2A patent/CN107978855B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100962930B1 (en) * | 2008-09-01 | 2010-06-10 | 강원대학교산학협력단 | Ultra-wide-band antenna having quarter-slot and method for manufacturing the same |
| CN204809390U (en) * | 2015-06-23 | 2015-11-25 | 中国计量学院 | Oval microstrip antenna of breach |
| CN205069864U (en) * | 2015-10-27 | 2016-03-02 | 南开大学 | Three frequency microstrip antenna based on defect ground structure frame is irregular oval cyclic annular |
| CN205248439U (en) * | 2015-11-20 | 2016-05-18 | 吉林医药学院 | Two ring shape plane monopole antenna of ultra wide band |
| CN205231238U (en) * | 2015-12-15 | 2016-05-11 | 深圳市金溢科技股份有限公司 | Vehicle positioning system and basic station unit |
| CN106252859A (en) * | 2016-08-27 | 2016-12-21 | 河北工业大学 | A kind of body surface communication antenna of flexible substrates |
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| Publication number | Publication date |
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| CN107978855A (en) | 2018-05-01 |
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