CN109411881A - A kind of wideband monopole sub-antenna with arc couple feed structure - Google Patents
A kind of wideband monopole sub-antenna with arc couple feed structure Download PDFInfo
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- CN109411881A CN109411881A CN201811332739.7A CN201811332739A CN109411881A CN 109411881 A CN109411881 A CN 109411881A CN 201811332739 A CN201811332739 A CN 201811332739A CN 109411881 A CN109411881 A CN 109411881A
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- feed structure
- antenna
- radiation patch
- ground plate
- medium 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
-
- 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
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- Waveguide Aerials (AREA)
Abstract
Wideband monopole sub-antenna disclosed by the invention with arc couple feed structure, belongs to wireless communication technique field.Including medium substrate, the one side of medium substrate has metal ground plate, and another side is circular radiation patch and T shape feed structure；T shape feed structure is made of energy coupling arm and rectangular arm, and energy coupling arm is arc, and radian is identical as circular radiation patch, and there are gaps with circular radiation patch for energy coupling arm；Rectangular arm and metal ground plate constitute microstrip line construction.The present invention uses couple feed structure, and the bandwidth of antenna is made to be expanded, and is both less than -10dB in the port reflection coefficient of the frequency range internal antenna of 1.31GHz~3.27GHz；Structure is simple, and design rationally, convenient for manufacture processing, can be produced in batches.
Description
Technical field
The invention belongs to wireless communication technique fields, and in particular to a kind of wideband monopole with arc couple feed structure
Sub-antenna.
Background technique
Wireless communication technique is developed rapidly in recent years, till now from initial analog wireless communication
5G wireless communication.And people are more and more stronger to the dependence of wireless communication, and the production and living of current people can not be left
Wireless communication.As the important composition component of wireless electronic communication apparatus, antenna carries reception and the transmitting function of radio wave
Can, realize the mutual conversion between high-frequency current and electromagnetic wave.Requirement of the people to wireless telecom equipment is higher and higher, especially moves
Antenna in dynamic wireless telecom equipment is also required to constantly update.
Broadband wireless communication technique has many technical advantages, thus can obtain extensive concern and be widely applied many
In military-civil electronic communication equipment.These technological merits include: 1) transmission rate it is high.Broadband signal bandwidth reaches number GHz, Ke Yiti
For biggish power system capacity.2) penetration capacity is strong.Wideband electromagnetic wave has the very strong ability for penetrating the barriers such as leaf, broadband
Technology can be used for Ground Penetrating Radar and realize that partition wall is imaged.3) good concealment.Due to ultra-broadband signal transmission power very
Low, signal is hidden in ambient noise and other signals, is difficult to be detected by enemy, thus ultra-broadband signal it is intercepted and
The probability spied out is very low, can be applied to stealthy electronic equipment or safe and secret communication.4) multi-path resolved very capable.Ultra-wide
Band signal is duration very short pulse and duty ratio is very low, and multipath component can separate in time.It is receiving
End broadband system can be realized the diversity reception of multipath signal, reduce the performance loss due to caused by multi-path jamming.5) energy is positioned
Power is strong.The distance resolution of signal and the bandwidth of signal are directly proportional.The Range resolution precision of radio ultra wide band system can achieve it
Hundreds and thousands of times of his system.6) system structure is simple, and at low cost, is easy digitlization.Have just because of broadband technology upper
Face plurality of advantages, broadband wireless communication technique are widely used in wireless communication, radar, detection imaging, high accuracy positioning very
To fields such as medical applications.Broadband wireless communication technique is with important application prospects and theoretical research value, by academia and
Industry personage generally has an optimistic view of.
Critical component of the broad-band antenna as broadband wireless electronics communication system, performance directly determine entire broadband without
The performance of line electronic communication system, however the frequency band of currently used broad-band antenna is relatively narrow, therefore designs one kind and have excellent performance
Broad-band antenna be just particularly important.
Summary of the invention
In order to solve the above-mentioned technical problem, the purpose of the present invention is to provide a kind of width with arc couple feed structure
Band monopole antenna.
The present invention is to be achieved through the following technical solutions:
A kind of wideband monopole sub-antenna with arc couple feed structure, including medium substrate, the one side of medium substrate
With metal ground plate, another side is circular radiation patch and T shape feed structure；T shape feed structure is by energy coupling arm and square
Shape arm composition, energy coupling arm are arc, and radian is identical as circular radiation patch, and energy coupling arm and circular radiation patch exist
Gap；Rectangular arm and metal ground plate constitute microstrip line construction.
Preferably, the gap of energy coupling arm and circular radiation patch be equal to energy coupling arm width 0.05%~
0.1%.
Preferably, the equal length of the length of metal ground plate and medium substrate, the width of metal ground plate are medium base
The 14%~17% of board width.
Preferably, the characteristic impedance for the microstrip line construction that rectangular arm and metal ground plate are constituted is 50 ± 10% Ω.
Preferably, the material of medium substrate is the FR-4 epoxy glass cloth laminated board that dielectric constant is 4.4.
Preferably, medium substrate, circular radiation patch and metal ground plate are all made of print structure.
Preferably, the material of circular radiation patch, T shape feed structure and metal ground plate is copper or silver.
Preferably, circular radiation patch is located at the middle part of medium substrate.
Compared with prior art, the invention has the following beneficial technical effects:
Wideband monopole sub-antenna disclosed by the invention with arc couple feed structure, including medium substrate, medium base
The one side of plate has metal ground plate, and another side is circular radiation patch and T shape feed structure；T shape feed structure is by energy coupling
Arm and rectangular arm composition are closed, energy coupling arm is arc, and radian is identical as circular radiation patch, energy coupling arm and circular radiation
There are gaps for patch；Rectangular arm and metal ground plate constitute microstrip line construction.The present invention uses couple feed structure, makes antenna
Bandwidth is expanded, and is being communicated in common 1.31GHz~3.27GHz frequency range at present, the port reflection coefficient of antenna
Both less than -10dB；Structure is simple, and design rationally, convenient for manufacture processing, can be produced in batches.Antenna relative bandwidth is up to 85.6%；
Using aperture-coupled structure, the irradiation structure and feed structure of antenna are separated, and realize antenna circular radiation structure (i.e. spoke
Penetrate characteristic) and the independence of feed structure (i.e. port match characteristic) adjust respectively.The circular radiation patch of antenna is located at medium base
The center of plate, T shape feed structure can be respectively arranged at any one boundary of medium substrate, when using the antenna
It is easily installed.
Further, the gap of energy coupling arm and circular radiation patch be equal to energy coupling arm width 0.05~
0.1%, so that the energy coupling efficiency between energy coupling arm and radiation patch improves, while also improving the end of the invention antenna
Mouth matching properties, i.e., obtain lesser port reflection coefficient S11 in working band.
Further, the length of metal ground plate is equal with medium substrate, and the width of metal ground plate is medium substrate
14~17%, so that conventional ground-plane size reduces, further expand the bandwidth of antenna.
Further, the characteristic impedance for the microstrip line construction that rectangular arm and metal ground plate are constituted is 50 ± 10% Ω, is made
Obtaining the antenna, without increasing impedance conversion equipment, can reduce answering for the antenna convenient for connecting with other equipment in application
With complexity and application cost.
Further, the material of medium substrate is the FR-4 epoxy glass cloth laminated board that dielectric constant is 4.4, the material energy
Enough satisfactions use needs, and cheap, are easy to buy.
Further, medium substrate, circular radiation patch and metal ground plate are all made of print structure, so that the antenna system
Make cost reduction, and is easy to implement large-scale production.
Further, the material of circular radiation patch, T shape feed structure and metal ground plate is copper or silver, so that the day
The energy loss of line reduces, and increases the radiation efficiency of antenna, greatly reduces energy consumption.
Further, circular radiation patch is located at the middle part of medium substrate, so that the antenna is easily installed in application, it should
Antenna can be rotated at random change placement direction when in use and its characteristic is constant.
Detailed description of the invention
Fig. 1 is the positive structure schematic of monopole antenna of the invention；
Fig. 2 is the reverse structure schematic of monopole antenna of the invention；
Fig. 3 is the side structure schematic diagram of monopole antenna of the invention；
Fig. 4 is resulting antenna port reflection system after being emulated with simulation software HFSS to monopole antenna of the invention
Count the change curve with frequency；
Fig. 5 is the 2.07GHzE-plane after being emulated with simulation software HFSS to monopole antenna system of the invention
On far field radiation pattern；
Fig. 6 is the 2.07GHzH-plane after being emulated with simulation software HFSS to monopole antenna system of the invention
On far field radiation pattern；
In figure, 1 is medium substrate, and 2 be circular radiation patch, and 3 be T shape feed structure, and 4 be metal ground plate.
Specific embodiment
The invention will be described in further detail with reference to the accompanying drawing, and doing is explanation to technical solution rather than limits
Determine, the positions determiner such as introduced " front ", " reverse side ", " bottom surface ", "upper", "lower", "left", "right" is intended merely to conveniently retouch
The relative position stated and used is not to be construed as to the limited of technical solution:
It is narrow in order to solve wireless mobile terminal antenna working band, increase the bandwidth of operation of antenna, it is flat in the present invention
Face structural antenna uses arc shaped slits couple feed technology, and reduces the size of antenna back-side ground plate, increases antenna
Radiation scope.
It is as shown in Figure 1, Figure 2, Figure 3 shows the wideband monopole sub-antenna with arc couple feed structure of the invention, including
Medium substrate 1, the material of medium substrate 1 preferably use dielectric constant for 4.4 FR-4 epoxy glass cloth laminated board, medium substrate
1 one side has metal ground plate 4, and another side is circular radiation patch 2 and T shape feed structure 3；Circular radiation patch 2 is preferred
Positioned at the middle part of medium substrate 1.The length of metal ground plate 4 is equal with medium substrate 1, and the width of metal ground plate 4 is medium
The 14%~17% of substrate 1.T shape feed structure 3 is made of energy coupling arm and rectangular arm, and energy coupling arm is arc, radian
Identical as circular radiation patch 2, there are gap, gap is preferably dimensioned to be energy coupling for energy coupling arm and circular radiation patch 2
Close the 0.05%~0.1% of arm width.；Rectangular arm and metal ground plate 4 constitute microstrip line construction, the feature resistance of microstrip line construction
Resist for 50 ± 10% Ω.Medium substrate 1, circular radiation patch 2 and metal ground plate 4 are all made of print structure.Circular radiation patch
The material of piece 2, T shape feed structure 3 and metal ground plate 4 preferably uses copper or silver.
Specific implementation method are as follows:
Long 50 ± 1%mm is selected, wide 50 ± 1%mm, the medium substrate of high 0.8 ± 1%mm, medium substrate material is FR-4,
In medium substrate front surface lower edge, it is respectively the port for being selected as antenna at 24 ± 1%mm apart from medium substrate right boundary, is being situated between
Etching a width under matter upper surface of base plate along port is 2 ± 1%mm, and length is the rectangle of 8 ± 1%mm, and rectangle, which is located at, to be situated between
The upper surface of matter substrate；A circular arc-shaped metal arm configuration, along 8 ± 1%mm, is being etched under medium substrate upper surface, gold
The width for belonging to arm is 1.9 ± 2%mm, a length of 18.5 ± 1%mm of circular arc inner wall of metal arm, and the circular arc outer wall of metal arm is a length of
20.9 ± 1%mm.Using medium substrate upper surface geometric center as the center of circle, the metal circular that a radius is 15 ± 3%mm is etched
Structure, boundary is all 10.0 ± 3%mm to the frontier distance medium substrate of the metal circular structure up and down.Circular metal patch
There are the gaps that a width is 0.1 ± 2%mm between curved metal arm.Select long 50 ± 1%mm, the metal of wide 8 ± 1%mm
Earth plate, metal ground plate are located at the reverse side of medium substrate.
Simulating, verifying is carried out to inventive antenna structure with electromagnetic simulation software HFSS:
Fig. 4 is that resulting antenna port reflection coefficient is bent with the variation of frequency after monopole antenna of the invention is emulated
Line, it can be seen from the figure that port scattering parameter of the antenna structure that designs of the present invention in frequency band 1.31GHz~3.27GHz
Both less than -10.0dB.And at f=2.07GHz, it is -14.5dB that port reflection coefficient S11, which reaches minimum value,.
Fig. 5 is remote on the 2.07GHzE-plane after being emulated with simulation software HFSS to antenna system of the invention
Field antenna pattern.As seen from the figure, main radiation direction of the antenna structure that the present invention designs at frequency 2.07GHz is vertical
In in the both direction of antenna plane, and there is certain symmetry.Cross polar component is both less than in all directions-
40dB can satisfy the parameter request of application.Curve a indicates the main polarization component in far field radiation pattern, curve b table in figure
Show the cross polar component on far-field radiation direction.
Fig. 6 is remote on the 2.07GHzH-plane after being emulated with simulation software HFSS to antenna system of the invention
Field antenna pattern.As seen from the figure, radiation energy of the antenna structure that the present invention designs at frequency 2.07GHz is concentrated mainly on
Perpendicular in the both direction of antenna plane.Curve a indicates the main polarization component in far field radiation pattern, curve b table in figure
Show the cross polar component on far-field radiation direction.It is shown in figure, cross polar component is far smaller than in the far-field radiation of antenna
Main polarization component.The polarization purity of antenna is higher.
To sum up, the monopole antenna that the present invention designs spoke in two opposite directions perpendicular to aerial radiation patch plane
It is larger to penetrate energy, and antenna energy is smaller in plane where aerial radiation patch, working band is widened derived from antenna
Feed uses aperture-coupled technology；Occur in the both direction perpendicular to patch compared with large radiation rather than only a side
Occurring greatest irradiation upwards is because metal ground plate reduces.
Claims (8)
1. a kind of wideband monopole sub-antenna with arc couple feed structure, which is characterized in that including medium substrate (1), be situated between
The one side of matter substrate (1) is metal ground plate (4), and another side is circular radiation patch (2) and T shape feed structure (3)；The feedback of T shape
Electric structure (3) is made of energy coupling arm and rectangular arm, and energy coupling arm is arc, and radian is identical as circular radiation patch (2),
There are gaps for energy coupling arm and circular radiation patch (2)；Rectangular arm and metal ground plate (4) constitute microstrip line construction.
2. the wideband monopole sub-antenna according to claim 1 with arc couple feed structure, which is characterized in that energy
The gap of coupling arm and circular radiation patch (2) is equal to the 0.05%~0.1% of energy coupling arm width.
3. the wideband monopole sub-antenna according to claim 1 with arc couple feed structure, which is characterized in that metal
The length of earth plate (4) and the equal length of medium substrate (1), the width of metal ground plate (4) are medium substrate (1) width
14%~17%.
4. the wideband monopole sub-antenna according to claim 1 with arc couple feed structure, which is characterized in that rectangle
The characteristic impedance for the microstrip line construction that arm and metal ground plate (4) are constituted is 50 ± 10% Ω.
5. the wideband monopole sub-antenna according to claim 1 with arc couple feed structure, which is characterized in that medium
The material of substrate (1) is the FR-4 epoxy glass cloth laminated board that dielectric constant is 4.4.
6. the wideband monopole sub-antenna according to claim 1 with arc couple feed structure, which is characterized in that medium
Substrate (1), circular radiation patch (2) and metal ground plate (4) are all made of print structure.
7. the wideband monopole sub-antenna according to claim 1 with arc couple feed structure, which is characterized in that round
The material of radiation patch (2), T shape feed structure (3) and metal ground plate (4) is copper or silver.
8. the wideband monopole sub-antenna according to claim 1 with arc couple feed structure, which is characterized in that round
Radiation patch (2) is located at the middle part of medium substrate (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811332739.7A CN109411881A (en) | 2018-11-09 | 2018-11-09 | A kind of wideband monopole sub-antenna with arc couple feed structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811332739.7A CN109411881A (en) | 2018-11-09 | 2018-11-09 | A kind of wideband monopole sub-antenna with arc couple feed structure |
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| Publication Number | Publication Date |
|---|---|
| CN109411881A true CN109411881A (en) | 2019-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811332739.7A Pending CN109411881A (en) | 2018-11-09 | 2018-11-09 | A kind of wideband monopole sub-antenna with arc couple feed structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112467352A (en) * | 2020-11-19 | 2021-03-09 | 辽宁工程技术大学 | Wrench-shaped trapped wave reconfigurable ultra-wideband antenna |
| CN114069206A (en) * | 2020-07-29 | 2022-02-18 | 电子科技大学 | Feed structure and ESR test system of broadband coupling antenna |
| CN114094326A (en) * | 2021-11-04 | 2022-02-25 | 天津大学 | UWB antenna gain improvement structure for WLAN applications |
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2018
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114069206A (en) * | 2020-07-29 | 2022-02-18 | 电子科技大学 | Feed structure and ESR test system of broadband coupling antenna |
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| CN114094326A (en) * | 2021-11-04 | 2022-02-25 | 天津大学 | UWB antenna gain improvement structure for WLAN applications |
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Application publication date: 20190301 |