CN109786942A - Frequency reconfigurable medium resonator antenna based on metal column load - Google Patents
Frequency reconfigurable medium resonator antenna based on metal column load Download PDFInfo
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- CN109786942A CN109786942A CN201910035730.8A CN201910035730A CN109786942A CN 109786942 A CN109786942 A CN 109786942A CN 201910035730 A CN201910035730 A CN 201910035730A CN 109786942 A CN109786942 A CN 109786942A
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Abstract
The invention discloses a kind of frequency reconfigurable medium resonator antennas based on metal column load, it include: medium substrate, dielectric resonator and two groups of metal columns, with being provided with one layer of microstrip line, upper surface covering metal, the center on metal ground offers the coupling slot vertical with microstrip line for medium substrate lower surface；The T-shaped structure of dielectric resonator, including the first cuboid portion and the second cuboid portion, the operating mode of the dielectric resonator are TE111 xMode；Two groups of metal columns are vertically arranged in the metal on the ground and are located at the two sides in first cuboid portion, the floor projection of two groups of metal columns is located in the floor projection region in second cuboid portion, the resonance frequency of inventive antenna is adjusted by changing the height of metal-loaded column, and there is preferable impedance matching, stable antenna pattern and lower cross polarization within the scope of frequency-tunable, can effectively use in KuThe even higher frequency of wave band.
Description
Technical field
The present invention relates to the communications field more particularly to a kind of frequency reconfigurable dielectric resonator days based on metal column load
Line.
Background technique
Compared to conventional metals paster antenna, medium resonator antenna has low-loss, low cost, light-weight and more designs
The advantages such as dimension.In recent years, a kind of growth of blowout is presented for the quantity of medium resonator antenna research report.In order to suitable
Should before in wireless communication system device compact design demand, the device of different operating frequency range is integrated into a device
On, it realizes the frequency reconfigurable design of antenna, is increasingly becoming main development trend.Currently, humorous for frequency reconfigurable medium
Shake device antenna, there is the research achievement for being much seen in report.Wherein, one kind is using water or the fluid with high dielectric constant fills
When the dielectric resonator part in medium resonator antenna, change the volume of fluid by micropump, and then it is humorous to change medium
The working frequency of vibration device antenna.Such antenna needs design complexity gives liquid drainage system, simultaneously because the presence of fluid, antenna
It can only be horizontally arranged, be unable to satisfy the use demand that antenna in some specific occasions needs non-aqueous placing flat.Another kind of is to use
Electronic device, such as variable capacitance, diode and switch load the privileged site in medium resonator antenna, and then to medium
The working frequency of resonant aerial is adjusted.The working frequency of antenna by electronic device working state control.It is such to weigh
Structure method is limited to need complicated electronic device control circuit, while the use of electronic device will increase the loss of system, drop
Low energy service efficiency, the reliability that reduction system works long hours under state.
Summary of the invention
The technical problem to be solved in the present invention is that in view of the above drawbacks of the prior art, providing a kind of based on metal column
The frequency reconfigurable medium resonator antenna of load.
The technical solution adopted by the present invention to solve the technical problems is: construct it is a kind of based on metal column load frequency can
Reconstruct medium resonator antenna, comprising:
Medium substrate, lower surface are provided with microstrip line, upper surface with covering one layer of metal, the center on the metal ground
Position offers the coupling slot vertical with the microstrip line；
Dielectric resonator, T-shaped structure, including the first cuboid portion and the second cuboid portion of same size, described
One cuboid portion is set to the metal on the ground, and the second rectangle body region is at the top of first cuboid portion, and described the
The width direction in one cuboid portion and the second cuboid portion is consistent with the extending direction of the coupling slot, first cuboid
The length in portion is less than the length in second cuboid portion, if being defined as x-axis, the coupling with the extending direction of the microstrip line
The extending direction of slot is defined as y-axis, and the thickness of medium substrate is defined as z-axis, and the operating mode of the dielectric resonator is TE111 x
Mode；
Two groups of metal columns are vertically arranged in the metal on the ground and are located at the two sides in first cuboid portion, and described two
The floor projection of group metal column is located in the floor projection region in second cuboid portion.
In the frequency reconfigurable medium resonator antenna of the present invention based on metal column load, the dielectric resonance
Device is located at the center on the metal ground, and the floor projection of two groups of metal columns is symmetrical about the coupling slot, and each group
Metal column includes two metal columns, and each group of metal column about the coupling slot vertically to divide face equally symmetrical.
In the frequency reconfigurable medium resonator antenna of the present invention based on metal column load, the coupling slot
It is that four vertex are formed by rectangular area that floor projection, which is located at the floor projection of two groups of metal columns,.
In the frequency reconfigurable medium resonator antenna of the present invention based on metal column load, the microstrip line
One end is concordant with the side of the medium substrate, and the other end of the medium substrate is located to be thrown with the level of two groups of metal columns
Shadow is formed by rectangular area for four vertex, and the floor projection phase of the floor projection of the microstrip line and the coupling slot
It hands over.
In the frequency reconfigurable medium resonator antenna of the present invention based on metal column load, the medium substrate
Flat shape be square.
In the frequency reconfigurable medium resonator antenna of the present invention based on metal column load, the metal column
Shape is cylindrical body.
In the frequency reconfigurable medium resonator antenna of the present invention based on metal column load, first rectangle
The height in body portion is greater than the height in second cuboid portion.
In the frequency reconfigurable medium resonator antenna of the present invention based on metal column load, the metal ground
Material is copper.
Frequency reconfigurable medium resonator antenna based on metal column load of the invention, has the advantages that this
The operating mode for inventing designed antenna is broadside TE111 xMode, resonance frequency by change metal-loaded column height into
Row is adjusted, and by changing the height of metal-loaded column, the working frequency of medium resonator antenna can be continuously adjusted, metal column
It loads at the narrow side of medium resonator antenna, to realize the higher gain of antenna and effective load of metal column, dielectric resonance
Device antenna uses T-type structure, and antenna of the invention has preferable impedance matching, stable radiation within the scope of frequency-tunable
Directional diagram and lower cross polarization can effectively be used in KuThe even higher frequency of wave band.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings:
Fig. 1 is the exploded view of the frequency reconfigurable medium resonator antenna of the invention based on metal column load；
Fig. 2 is the top view of the frequency reconfigurable medium resonator antenna of the invention based on metal column load；；
Fig. 3 is the removing dielectric resonator of the frequency reconfigurable medium resonator antenna of the invention based on metal column load
The perspective view of structure in addition；
Fig. 4 is the field distribution comparison diagram of antenna when loading the metal column of different height；
Fig. 5 is the change in gain schematic diagram of antenna when loading the metal column of different height；
Fig. 6 is the return loss variation schematic diagram of antenna when loading the metal column of different height；
Fig. 7 is the directional diagram contrast schematic diagram of antenna when loading the metal column of different height.
Specific embodiment
To facilitate the understanding of the present invention, a more comprehensive description of the invention is given in the following sections with reference to the relevant attached drawings.In attached drawing
Give exemplary embodiments of the invention.But the invention can be realized in many different forms, however it is not limited to this paper institute
The embodiment of description.On the contrary, purpose of providing these embodiments is make it is more thorough and comprehensive to the disclosure.It answers
When understanding that the specific features in the embodiment of the present invention and embodiment are the detailed description to technical scheme, rather than
Restriction to technical scheme, in the absence of conflict, the technical characteristic in the embodiment of the present invention and embodiment can
To be combined with each other
It should be noted that term as used herein "vertical", "horizontal", "left" and "right" and similar table
It states for illustrative purposes only.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.
" first ", " second " used in this specification etc. includes that the term of ordinal number can be used for illustrating various constituent elements,
But these constituent elements are not limited by these terms.It is only that using the purpose of these terms and distinguishes a constituent element
In other constituent elements.For example, first constituent element can be named as under the premise of not departing from interest field of the invention
Two constituent elements, similarly, the second constituent element can also be named as the first constituent element.
With reference to Fig. 1-2, frequency reconfigurable dielectric resonator 2 antenna of the invention loaded based on metal column 3 includes medium
Substrate 1, dielectric resonator 2 and two groups of metal columns 3.
Wherein, the lower surface of medium substrate 1 is provided with microstrip line 4, the upper surface of medium substrate 1 with covering one layer of metal 5,
Metal described in the present embodiment 5 material be copper.The metal 5 center offer coupling slot 6, the coupling slot
6 extending direction is vertical with the extending direction of the microstrip line 4.Specifically, the flat shape of the medium substrate 1 is pros
Shape.It as shown in the figure, is that x-axis, the extending direction of the coupling slot 6 are defined as with the extending direction of the microstrip line 4 herein
It is defined as y-axis, the thickness direction of medium substrate 1 is z-axis.
Wherein, the dielectric resonator 2 with being located at the metal 5 center, dielectric resonator 2 is with being adhered to metal
It is fed on 5 and by the way of slot-coupled, the operating mode of the dielectric resonator 2 is TE111 xMode.Dielectric resonator 2
It is equivalent to the T-type structure formed after the two sides of Rectangular Enclosure with Participating Media resonator 2 in the x direction are partly cut away.
Specifically, the T-shaped structure of dielectric resonator 2, symmetrically and front and back is symmetrical, including the first rectangle of same size
Body portion and the second cuboid portion, the height in first cuboid portion are greater than the height in second cuboid portion, and described first
Cuboid portion is with being adhered to the metal on 5, and the second rectangle body region is at the top of first cuboid portion, the first rectangle
The front/rear end in body portion and the second cuboid portion is concordant, the width direction in first cuboid portion and the second cuboid portion with
The extending direction of the coupling slot 6 is consistent, and the length in first cuboid portion is less than the length in second cuboid portion.
More specifically, the floor projection of two groups of metal columns 3 is symmetrical about the coupling slot 6, and each group of metal column 3 wraps
Include two metal columns 3, and each group of metal column 3 about the coupling slot 6 vertically to divide face equally symmetrical.
Wherein, the shape of the metal column 3 is cylindrical body.Two groups of metal columns 3 with being vertically arranged in the metal on 5 and position
In the two sides in first cuboid portion, the floor projection of two groups of metal columns 3 is located at the level in second cuboid portion
In view field.
It is to screw on come and run through medium substrate 1 from the bottom of medium substrate 1 using four metallic screws in the present embodiment,
The prominent part with 1 upper surface of medium substrate is formed the metal column 3 after running through.
With reference to Fig. 3, more specifically, the floor projection of the coupling slot 6 is located at the floor projection of two groups of metal columns 3
It is formed by rectangular area for four vertex.One end of the microstrip line 4 is concordant with the side of the medium substrate 1, described
It is that four vertex are formed by rectangular area that the other end of medium substrate 1, which is located at the floor projection of two groups of metal columns 3,
And the floor projection of the microstrip line 4 intersects with the floor projection of the coupling slot 6.
In this specific embodiment, it for 9.9, loss angle tangent is 0.00015 that antenna, which uses relative dielectric constant,
Dielectric resonator 2.Dielectric resonator 2 is the T-type formed after being partly cut away by the two sides of Rectangular Enclosure with Participating Media resonator in the x direction
Structure.The height dimension of T-type dielectric resonator 2 in a z-direction is h1With h2, length dimension in the x direction is l1With ld, in y
Width dimensions on direction are wd.Four radiuses are rpillarAnd height is hpillarMetal column 3 load in dielectric resonance
The cut-out of device 2, the adjusting for 2 operating frequency of antenna of dielectric resonator.The spacing of the center of metal column 3 in the x direction
For l3, spacing in y-direction is l4.4 line width of microstrip line is winput, length l5, it is printed on the bottom side of medium substrate 1.Medium
1 model Rogers RO4003C of substrate, with relative dielectric constant 3.38, loss angle tangent 0.0027 is for side length
l2Square structure, with a thickness of hs.Metal on medium substrate 15 copper thickness be 0.0175mm.
Left figure is 3 height of metal-loaded column with reference to Fig. 4, in Fig. 4 electric field vector figure when being 0mm, right figure is load gold
Belong to electric field strength map of magnitudes when 3 height of column is 1.2mm, from left figure as can be seen that the operating mode of 2 antenna of dielectric resonator is
Broadside TE111 xMode, because the two sides of dielectric resonator 2 in the x direction are partly cut away, electric field is cut in dielectric resonator 2
The region removed will more be concentrated than other regions.From can be seen that the load of metal column 3 in right figure from this in resonator
Field distribution has maximum influence, thus has maximum frequency tuning capabilities.Based on the above principles, by changing load upper
The height for the metal column 3 that rheme is set, the field distribution of 2 antenna of dielectric resonator will be adjusted so that realization dielectric resonator 2 days
The frequency reconfigurable of line designs.The working frequency of 2 antenna of frequency reconfigurable dielectric resonator of the structure can be by changing gold
The height realization for belonging to column 3 continuously adjusts.And the adjusting method of 2 operating frequency of antenna of dielectric resonator proposed by the invention, it can
To be effectively applied to KuWave band or higher frequency section, high degree avoid complicated bias circuit and electronic component
Low reliability at higher frequencies.In addition, can also be carried out using MEMS to antenna except radio frequency system precisely fast
The working frequency control of speed.
Finally determination is as follows: h by simulation optimization for the final size of antenna of the invention1=1, h2=2, rpillar=
0.55,hs=0.508, l1=2.8, l2=20, l3=5, l4=4, l5=12, ld=6, ls=3, wd=5, ws=0.5, winput
=1.2, above-mentioned numerical value unit is millimeter.Fig. 5 is the change in gain schematic diagram of antenna when loading the metal column of different height, from
As can be seen that (when highly for 0mm), the centre frequency of Antenna Operation is when dielectric resonator 2 is not loaded with metal column 3 in figure
18.55GHz；When the height of metal-loaded column 3 changes from 0mm to 1.9mm, the working frequency of antenna is changed to from 18.55GHz
13.35GHz.At this time since under the height of different metal-loaded columns 3, the input impedance of antenna can generate certain variation, to day
The bandwidth of operation of line has certain influence, and tunable frequency range takes antenna reflection coefficient to remain less than the range of -10dB.
Fig. 6 is the return loss variation schematic diagram of antenna when loading the metal column of different height, it can be seen from the figure that by
Increase in the conductor losses of the load of metal column 3, antenna, when 3 height of metal column of load changes to 1.9mm from 0mm, antenna
Gain be reduced to 5.8dBi from 8.58dBi.However in frequency tuning range, 5.8dBi is still greater than in the gain of antenna, is protected
Hold higher numerical value.
Fig. 7 is the directional diagram contrast schematic diagram of antenna when loading the metal column of different height, and three group picture of upper, middle and lower is specific
It is 3 height h of metal-loaded columnpillarRespectively 0mm, 1.2mm and 1.9mm correspond to operating frequency of antenna be 18.55GHz,
Directional diagram schematic diagram at 16.72GHz and 13.35GHz.It can be seen from the figure that the antenna have stable antenna pattern,
Lower cross polarization.The cross polarization in the face antenna E is lower than -40dB, and the face H is lower than -30dB.
In conclusion the frequency reconfigurable medium resonator antenna of the invention based on metal column load, has with following
Beneficial effect: the operating mode of antenna designed by the present invention is broadside TE111 xMode, resonance frequency is by changing metal-loaded column
Height be adjusted, by changing the height of metal-loaded column, the working frequency of medium resonator antenna can be adjusted continuously
Section, metal column load at the narrow side of medium resonator antenna, to realize the higher gain of antenna and effective load of metal column,
Medium resonator antenna uses T-type structure, and antenna of the invention has preferable impedance matching, steady within the scope of frequency-tunable
Fixed antenna pattern and lower cross polarization can effectively be used in KuThe even higher frequency of wave band.
The embodiment of the present invention is described with above attached drawing, but the invention is not limited to above-mentioned specific
Embodiment, the above mentioned embodiment is only schematical, rather than restrictive, those skilled in the art
Under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, it can also make very much
Form, all of these belong to the protection of the present invention.
Claims (8)
1. a kind of frequency reconfigurable medium resonator antenna based on metal column load characterized by comprising
Medium substrate, lower surface are provided with microstrip line, upper surface with covering one layer of metal, the center on the metal ground
Offer the coupling slot vertical with the microstrip line；
Dielectric resonator, T-shaped structure, including the first cuboid portion and the second cuboid portion of same size, first square
Shaped body is set to the metal on the ground, and the second rectangle body region is at the top of first cuboid portion, first square
Shaped body and the width direction in the second cuboid portion are consistent with the extending direction of the coupling slot, first cuboid portion
Length is less than the length in second cuboid portion, if being defined as x-axis with the extending direction of the microstrip line, the coupling slot
Extending direction is defined as y-axis, and the thickness of medium substrate is defined as z-axis, and the operating mode of the dielectric resonator is TE111 xMould
Formula；
Two groups of metal columns are vertically arranged in the metal on the ground and are located at the two sides in first cuboid portion, two groups of gold
The floor projection for belonging to column is located in the floor projection region in second cuboid portion.
2. the frequency reconfigurable medium resonator antenna according to claim 1 based on metal column load, which is characterized in that
The dielectric resonator is located at the center on the metal ground, and the floor projection of two groups of metal columns is about the coupling slot
Symmetrically, each group of metal column includes two metal columns, and each group of metal column is faced about vertically dividing equally for the coupling slot
Claim.
3. the frequency reconfigurable medium resonator antenna according to claim 1 based on metal column load, which is characterized in that
It is that four vertex are formed by rectangular area that the floor projection of the coupling slot, which is located at the floor projection of two groups of metal columns,
It is interior.
4. the frequency reconfigurable medium resonator antenna according to claim 1 based on metal column load, which is characterized in that
One end of the microstrip line is concordant with the side of the medium substrate, and the other end of the medium substrate is located at two groups of gold
Belong to the floor projection of column to be formed by rectangular area for four vertex, and the floor projection of the microstrip line and the coupling slot
Floor projection intersection.
5. the frequency reconfigurable medium resonator antenna according to claim 1 based on metal column load, which is characterized in that
The flat shape of the medium substrate is square.
6. the frequency reconfigurable medium resonator antenna according to claim 1 based on metal column load, which is characterized in that
The shape of the metal column is cylindrical body.
7. the frequency reconfigurable medium resonator antenna according to claim 1 based on metal column load, which is characterized in that
The height in first cuboid portion is greater than the height in second cuboid portion.
8. the frequency reconfigurable medium resonator antenna according to claim 1 based on metal column load, which is characterized in that
The material on the metal ground is copper.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910035730.8A CN109786942A (en) | 2019-01-15 | 2019-01-15 | Frequency reconfigurable medium resonator antenna based on metal column load |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910035730.8A CN109786942A (en) | 2019-01-15 | 2019-01-15 | Frequency reconfigurable medium resonator antenna based on metal column load |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110165404A (en) * | 2019-06-12 | 2019-08-23 | 南通大学 | Broadband low section dielectric patch antenna with anisotropic properties |
| CN110323554A (en) * | 2019-07-04 | 2019-10-11 | 西安电子科技大学 | Broad beam medium resonator antenna based on embedded metal column |
| CN113255387A (en) * | 2021-06-25 | 2021-08-13 | 中关村芯海择优科技有限公司 | Frequency self-adaptive adjusting system and method for tag antenna |
| CN113471705A (en) * | 2021-07-26 | 2021-10-01 | 东莞理工学院 | Grounded metal column coupled dielectric resonator antenna |
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| US8836600B2 (en) * | 2010-11-29 | 2014-09-16 | Skywave Mobile Communications Inc. | Quadrifilar helix antenna system with ground plane |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110165404A (en) * | 2019-06-12 | 2019-08-23 | 南通大学 | Broadband low section dielectric patch antenna with anisotropic properties |
| CN110323554A (en) * | 2019-07-04 | 2019-10-11 | 西安电子科技大学 | Broad beam medium resonator antenna based on embedded metal column |
| CN113255387A (en) * | 2021-06-25 | 2021-08-13 | 中关村芯海择优科技有限公司 | Frequency self-adaptive adjusting system and method for tag antenna |
| CN113471705A (en) * | 2021-07-26 | 2021-10-01 | 东莞理工学院 | Grounded metal column coupled dielectric resonator antenna |
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Application publication date: 20190521 |