CN106229660A - 12 jiaos of microwave energys of low-loss collect antenna - Google Patents

Abstract

The invention discloses a kind of 12 jiaos of microwave energys of low-loss and collect antenna, including consistent size from top to bottom and dielectric passivation bonded to each other, medium substrate and earth plate, wherein it is pasted with metal antenna paster with on the medium substrate of dielectric passivation laminating side, the middle part of medium substrate is provided with and extends vertically through the cylindrical metal conductor of medium substrate and four cylindrical cavities, and earth plate is provided with the circular hole concentric with cylindrical metal conductor bottom surface.The present invention has lower return loss, good impedance matching and standing-wave ratio and higher gain such that it is able to the radio-frequency (RF) energy in efficient reception environment.

Description

12 jiaos of microwave energys of low-loss collect antenna

Technical field

The invention belongs to electromagnetic energy reception antenna technical field, be specifically related to a kind of for receiving radio-frequency (RF) energy in environment 12 jiaos of microwave energys of low-loss collect antennas.

Background technology

In intelligent building, each portion that the sensor node that each building is the most up to a hundred is distributed in building body Position, is used for monitoring the parameters such as temperature, brightness and flow of the people, provides power supply by wiring for these sensor nodes, and its cost is Sufficiently expensive, and use battery main problems faced of powering is the most how to judge that the battery of which node has exhausted to go forward side by side Row is changed, and this is commercially difficult to accept, and using ambient radio-frequency energy collection technique to be aided with rechargeable battery is then its ratio Comparatively ideal power supply mode.

Summary of the invention

Present invention solves the technical problem that and there is provided a kind of simple in construction and 12 jiaos of microwaves of low-loss reasonable in design Collection of energy antenna, this antenna is compared with the less size having for other antenna, the loss of relatively low clawback, good resistance Anti-coupling and higher gain.

The present invention solves that above-mentioned technical problem adopts the following technical scheme that, 12 jiaos of microwave energys of low-loss collect antenna, It is characterized in that including consistent size and dielectric passivation bonded to each other, medium substrate and earth plate from top to bottom, wherein with Jie Being pasted with metal antenna paster on the medium substrate of matter cover layer laminating side, the middle part of medium substrate is provided with and extends vertically through medium base The cylindrical metal conductor of plate and four cylindrical cavities, earth plate is provided with the circular hole concentric with cylindrical metal conductor bottom surface； The material of described dielectric passivation is Rogers RO6002, DIELECTRIC CONSTANT ε_r=2.94, thickness d=0.51mm, length and width is equal For 30mm；The radius of the circular coverage rate of described metal antenna paster is 0.1089 λ, wherein λ=122mm, and λ is that 2.45GHz penetrates The wavelength of frequency, thickness is 0.02mm, and material is copper, and the material of described medium substrate is RogersRO6010, DIELECTRIC CONSTANT ε_r= 10.2, thickness d=2.54mm, length and width is 30mm, the central point of metal antenna paster and medium substrate upper surface Center position is consistent；Design shape and the size of described metal antenna paster meet following requirement, set up plane rectangular coordinates System, by initial point (0mm ,-2.5mm) as starting point, (13.75mm ,-2.5mm) be another end points along x-axis positive direction make one long For the line segment one of 13.75mm, with point (13.75mm ,-2.5mm) for the point of rotation, line segment one is rotated 120 ° in the counterclockwise direction, With curvilinear equationIntersection point be H (15.625mm ,-5.7476mm), be right with straight line y=-x Claim axle to make minute surface symmetry and obtain a L (5.7476mm ,-15.625mm), then along the direction that line segment one and x-axis angle are 60 °, sitting Parameter the 4th extends to original 2 times in interval, be extended line segment two, makees minute surface with straight line y=-x for axis of symmetry symmetrical To extending line segment three, the intersection point extending line segment two and prolongation line segment three isPoint Other junction point H (15.625mm ,-5.7476mm),With L (5.7476mm ,- 15.625mm)、Obtain line segment HW and line segment LW, again by initial point (0mm, 0mm) as starting point, make the line segment of an a length of 2.5mm along x-axis positive direction, be first curve with (2.5mm ,-1.25mm) The center of circle, with (2.5mm, 0mm) for end point, be another end points with (3.75mm ,-1.25mm), radius r₁=1.25mm, makes Angle of circumference is 90 °, and direction is the circular arc protruded to x-axis and y-axis positive direction, with the circle that (5mm ,-1.25mm) is second curve The heart, with (3.75mm ,-1.25mm) for end point, is another end points with (6.25mm ,-1.25mm), radius r₂=1.25mm, makees Going out angle of circumference is 180 °, and direction is the circular arc protruded to y-axis negative direction, is then the 3rd curve with (7.5mm ,-1.25mm) The center of circle, with (6.25mm ,-1.25mm) for end point, be another end points with (7.5mm, 0mm), radius r₃=1.25mm, makes Angle of circumference is 90 °, and direction is the circular arc protruded to x-axis negative direction and y-axis positive direction, is the 4th song with (7.5mm ,-2.5mm) The center of circle of line, with (7.5mm, 0mm) for end point, is another end points with (10mm ,-2.5mm), radius r₄=2.5mm, makes circle Round angle is 90 °, and direction is the circular arc protruded to x-axis and y-axis positive direction；With the circle that (13.75mm ,-2.5mm) is the 5th curve The heart, with (10mm ,-2.5mm) for end point, is another end points with H (15.625mm ,-5.7476mm), radius r₅=3.75mm, Making angle of circumference is 120 °, and direction is the circular arc protruded to x-axis and y-axis negative direction, obtains initial graphics one, with straight line y=-x For axis of symmetry, it is symmetrical that initial graphics one carries out minute surface, obtains initial graphics two, line segment HW, line segment LW, initial graphics one and just Beginning figure two merges, and obtains rotating graphs one, by rotating graphs one with point For the point of rotation, turn clockwise 30 °, 60 °, 90 °, 120 °, 150 °, 180 °, 210 °, 240 °, 270 °, 300 ° and 330 °, respectively Obtain rotating graphs two, rotating graphs three, rotating graphs four, rotating graphs five, rotating graphs six, rotating graphs seven, rotation figure Shape eight, rotating graphs nine, rotating graphs ten, rotating graphs 11 and rotating graphs 12, rotating graphs one, rotating graphs two, Rotating graphs three, rotating graphs four, rotating graphs five, rotating graphs six, rotating graphs seven, rotating graphs eight, rotating graphs nine, Rotating graphs ten, rotating graphs 11 and rotating graphs 12 merge, and obtain closed figure, by the circular coverage rate of closed figure Reduced radius be design shape and the size that original 0.32548 times obtains required metal antenna paster, according to design shape And size cutting obtains metal antenna paster；One end of described cylindrical metal conductor is connected with metal antenna paster, cylindrical The material of metallic conductor is copper, its bottom surface radius r=0.5mm, thickness d=2.54mm, cylindrical metal conductor and metal antenna The vertical dimension of the center of circle, junction of paster and four sides of medium substrate be respectively 16.59mm, 16.59mm, 13.41mm and 13.41mm；On described medium substrate, the radius of four cylindrical cavities is 0.5mm, the circle center line connecting of four cylindrical cavities Constituting the length of side is the square of 22mm, and on this square, following and the upper and lower side of medium substrate vertical dimension is respectively 2.6mm And 5.4mm, square left and right side is respectively 2mm and 6mm with the vertical dimension of the medium substrate left and right sides；With cylindrical metal The aperture R=1.9mm of circular hole on the earth plate that conductor is relative, the output interface of the described cylindrical metal conductor other end and energy Management circuit is connected, and this energy management circuit is for storing the energy absorbed..

The technique effect of the present invention is: 12 jiaos of microwave energys of low-loss are collected antennas and had lower return loss, good Good impedance matching and standing-wave ratio and higher gain such that it is able to the radio-frequency (RF) energy in efficient reception environment.

Accompanying drawing explanation

Fig. 1 is the structural representation of metal antenna paster；

Fig. 2 is that 12 jiaos of microwave energys of low-loss collect antenna structure view；

Fig. 3 is the echo utilizing 12 jiaos of microwave energys of low-loss of HFSS antenna modeling simulation software simulation to collect antennas Loss figure；

Fig. 4 is that the 12 jiaos of microwave energys of low-loss utilizing the simulation of HFSS antenna modeling simulation software collect antenna standing wave ratios Figure.

In figure: 1, dielectric passivation, 2, medium substrate, 3, earth plate, 4, metal antenna paster, 5, cylindrical metal leads Body, 6, cylindrical cavity, 7, circular hole.

Detailed description of the invention

Below in conjunction with the accompanying drawing in the present invention, the technical scheme in specific implementation process of the present invention is carried out clear, complete Whole, concrete description.

The core of this invention is that 12 jiaos of microwave energys of low-loss collect Antenna Design, needs when microstrip antenna designs 12 jiaos of microwave energys of low-loss to be collected the size of the metal antenna paster of antenna, and the size of medium substrate, thickness are carried out Theoretic estimation, more quickly could find the low-loss 12 jiaos of applicable characteristic frequency simulation experiment when accurately Microwave energy collects antenna.So below as a example by rectangular microstrip antenna, the theoretical meter of explanation each data parameters of microstrip antenna Calculation method.

Patch size L × W, patch width W be:

$W=\frac{c}{2f_0}{\left(\frac{{\mathrm{\ϵ}}_r+1}{2}\right)}^{-\frac{1}{2}}---\left(1\right)$

In (1) formula, c is the light velocity, f₀For forbidden band mid frequency, ε_rFor relative dielectric constant.

The relative efficiency DIELECTRIC CONSTANT ε of microstrip antenna medium substrate_reFor:

${\mathrm{\ϵ}}_{re}=\frac{{\mathrm{\ϵ}}_r+1}{2}+\frac{{\mathrm{\ϵ}}_r-1}{2}{(1+\frac{12h}{W})}^{-\frac{1}{2}}---\left(2\right)$

H represents thickness of dielectric layers, and in order to reduce the surface wave impact on antenna performance, the thickness of dielectric substrate should Satisfied theoretical calculation formula once:

$h\≤\frac{0.3c}{2{\mathrm{\πf}}_u\sqrt{{\mathrm{\ϵ}}_r}}---\left(3\right)$

Wherein f_uHighest frequency for the work of microstrip antenna.

The equivalent radiated power gap length △ L of microstrip antenna is:

$\mathrm{\Δ}L=0.412h\frac{({\mathrm{\ϵ}}_{re}+0.3)(W/h+0.264)}{({\mathrm{\ϵ}}_{re}-0.258)(W/h+0.8)}---\left(4\right)$

Then length L of microstrip antenna paster is:

$L=\frac{c}{2f_0}\frac{1}{\sqrt{{\mathrm{\ϵ}}_{re}}}-2\mathrm{\Δ}L---\left(5\right)$

Size L of earth plate_g×W_gMeet following theoretical formula

L_g≥L+6h (6)

W_g≥W+6h (7)

Rectangular microstrip antenna is that coaxial line feeds, when after the length and width determining rectangular patch, typically The normal impedance of 50 Ω is added in microstrip antenna.

As shown in Figure 1-2,12 jiaos of microwave energys of low-loss collect antenna, including consistent size from top to bottom and mutually paste Dielectric passivation 1, medium substrate 2 and the earth plate 3 closed, the medium substrate 2 of side of wherein fitting with dielectric passivation 1 attaches There are metal antenna paster 4, the middle part of medium substrate 2 to be provided with and extend vertically through the cylindrical metal conductor 6 of medium substrate 2 and four circles Cylindrical bore 6, earth plate 3 is provided with the circular hole 7 concentric with cylindrical metal conductor 5 bottom surface；The material of described dielectric passivation 1 For Rogers RO6002, DIELECTRIC CONSTANT ε_r=2.94, thickness d=0.51mm, length and width is 30mm；Described metal sky The radius of the circular coverage rate of line paster 4 is 0.1089 λ, wherein λ=122mm, and λ is the wavelength of 2.45GHz radio frequency, and thickness is 0.02mm, material is copper, and the material of described medium substrate 2 is Rogers RO6010, DIELECTRIC CONSTANT ε_r=10.2, thickness d= 2.54mm, length and width is the center position of 30mm, the central point of metal antenna paster 4 and medium substrate 2 upper surface Unanimously；Design shape and the size of described metal antenna paster 4 meet following requirement, set up plane right-angle coordinate, by initial point (0mm ,-2.5mm), as starting point, (13.75mm ,-2.5mm) is that another end points makes an a length of 13.75mm along x-axis positive direction Line segment one, with point (13.75mm ,-2.5mm) for the point of rotation, line segment one is rotated 120 ° in the counterclockwise direction, with curvilinear equationIntersection point be H (15.625mm ,-5.7476mm), make minute surface with straight line y=-x for axis of symmetry Symmetry obtains a L (5.7476mm ,-15.625mm), then along the direction that line segment one and x-axis angle are 60 °, in coordinate axes the 4th district In extend to original 2 times, be extended line segment two, make minute surface symmetry with straight line y=-x for axis of symmetry and be extended line segment Three, the intersection point extending line segment two and prolongation line segment three isJunction point H respectively (15.625mm ,-5.7476mm),With L (5.7476mm ,-15.625mm),Obtain line segment HW and line segment LW, again by initial point (0mm, 0mm) as rising Point, makes the line segment of an a length of 2.5mm along x-axis positive direction, with the center of circle that (2.5mm ,-1.25mm) is first curve, with (2.5mm, 0mm) is end point, is another end points with (3.75mm ,-1.25mm), radius r₁=1.25mm, making angle of circumference is 90 °, direction is the circular arc protruded to x-axis and y-axis positive direction, with the center of circle that (5mm ,-1.25mm) is second curve, with (3.75mm ,-1.25mm) is end point, is another end points with (6.25mm ,-1.25mm), radius r₂=1.25mm, makes circumference Angle is 180 °, and direction is the circular arc protruded to y-axis negative direction, then with the center of circle that (7.5mm ,-1.25mm) is the 3rd curve, With (6.25mm ,-1.25mm) for end point, it is another end points with (7.5mm, 0mm), radius r₃=1.25mm, makes angle of circumference Being 90 °, direction is the circular arc protruded to x-axis negative direction and y-axis positive direction, with the circle that (7.5mm ,-2.5mm) is the 4th curve The heart, with (7.5mm, 0mm) for end point, is another end points with (10mm ,-2.5mm), radius r₄=2.5mm, making angle of circumference is 90 °, direction is the circular arc protruded to x-axis and y-axis positive direction；With the center of circle that (13.75mm ,-2.5mm) is the 5th curve, with (10mm ,-2.5mm) is end point, is another end points with H (15.625mm ,-5.7476mm), radius r₅=3.75mm, makes circle Round angle is 120 °, and direction is the circular arc protruded to x-axis and y-axis negative direction, obtains initial graphics one, with straight line y=-x as symmetry Axle, carries out initial graphics one minute surface symmetry, obtains initial graphics two, line segment HW, line segment LW, initial graphics one and initial graphics Two merge, and obtain rotating graphs one, by rotating graphs one with pointFor rotating Point, turn clockwise 30 °, 60 °, 90 °, 120 °, 150 °, 180 °, 210 °, 240 °, 270 °, 300 ° and 330 °, respectively obtains rotation Turn figure two, rotating graphs three, rotating graphs four, rotating graphs five, rotating graphs six, rotating graphs seven, rotating graphs eight, rotation Turn figure nine, rotating graphs ten, rotating graphs 11 and rotating graphs 12, rotating graphs one, rotating graphs two, rotating graphs Three, rotating graphs four, rotating graphs five, rotating graphs six, rotating graphs seven, rotating graphs eight, rotating graphs nine, rotating graphs Ten, rotating graphs 11 and rotating graphs 12 merge, and obtain closed figure, are contracted by the radius of the circular coverage rate of closed figure Little for the original 0.32548 times design shape obtaining required metal antenna paster 4 and size, cut out according to design shape and size Cut and obtain metal antenna paster 4；One end of described cylindrical metal conductor 5 is connected with metal antenna paster 4, and cylindrical metal is led The material of body 5 is copper, its bottom surface radius r=0.5mm, thickness d=2.54mm, cylindrical metal conductor 5 and metal antenna paster 4 The vertical dimension of the center of circle, junction and 2 four sides of medium substrate be respectively 16.59mm, 16.59mm, 13.41mm and 13.41mm；On described medium substrate 2, the radius of four cylindrical cavities 6 is 0.5mm, and the center of circle of four cylindrical cavities 6 is even It is the square of 22mm that line constitutes the length of side, and on this square, following and medium substrate about 2 side vertical dimension is respectively 2.6mm and 5.4mm, square left and right side is respectively 2mm and 6mm with the vertical dimension of medium substrate 2 left and right sides；With cylinder The aperture R=1.9mm of circular hole 7 on the earth plate 3 that shape metallic conductor 5 is relative, the output of described cylindrical metal conductor 5 other end Interface is connected with energy management circuit, and this energy management circuit is for storing the energy absorbed.

Fig. 3 is the echo utilizing 12 jiaos of microwave energys of low-loss of HFSS antenna modeling simulation software simulation to collect antennas Loss figure, as seen from the figure, it is-32dB that 12 jiaos of microwave energys of this low-loss collect the return loss of antenna, than other same volume The return loss of long-pending antenna is also little, and performance is the best.

Fig. 4 is that the 12 jiaos of microwave energys of low-loss utilizing the simulation of HFSS antenna modeling simulation software collect antenna standing wave ratios Figure, as seen from the figure, it is 1.032 in the standing-wave ratio of 2.45GHz that 12 jiaos of microwave energys of this low-loss collect antennas, closely 1.

Embodiment above describes the ultimate principle of the present invention, principal character and advantage, the technical staff of the industry should Understanding, the present invention is not restricted to the described embodiments, and the simply explanation present invention's described in above-described embodiment and description is former Reason, under the scope without departing from the principle of the invention, the present invention also has various changes and modifications, and these changes and improvements each fall within In the scope of protection of the invention.

Claims (1)

1. 12 jiaos of microwave energys of low-loss collect antennas, it is characterised in that include consistent size and bonded to each other from top to bottom Dielectric passivation, medium substrate and earth plate, be wherein pasted with metal sky with on the medium substrate of dielectric passivation laminating side Line paster, the middle part of medium substrate is provided with and extends vertically through the cylindrical metal conductor of medium substrate and four cylindrical cavities, connects Floor is provided with the circular hole concentric with cylindrical metal conductor bottom surface；The material of described dielectric passivation is Rogers RO6002, DIELECTRIC CONSTANT ε_r=2.94, thickness d=0.51mm, length and width is 30mm；The circular covering of described metal antenna paster The radius in face is 0.1089 λ, wherein λ=122mm, and λ is the wavelength of 2.45GHz radio frequency, and thickness is 0.02mm, and material is copper, institute The material stating medium substrate is Rogers RO6010, DIELECTRIC CONSTANT ε_r=10.2, thickness d=2.54mm, length and width is 30mm, the central point of metal antenna paster is consistent with the center position of medium substrate upper surface；Described metal antenna paster Design shape and size meet following requirement, set up plane right-angle coordinate, by initial point (0mm ,-2.5mm) as starting point, (13.75mm ,-2.5mm) is that another end points makes the line segment one of an a length of 13.75mm along x-axis positive direction, with point (13.75mm ,-2.5mm) is the point of rotation, in the counterclockwise direction line segment one is rotated 120 °, with curvilinear equationIntersection point be H (15.625mm ,-5.7476mm), make minute surface with straight line y=-x for axis of symmetry Symmetry obtains a L (5.7476mm ,-15.625mm), then along the direction that line segment one and x-axis angle are 60 °, in coordinate axes the 4th district In extend to original 2 times, be extended line segment two, make minute surface symmetry with straight line y=-x for axis of symmetry and be extended line segment Three, the intersection point extending line segment two and prolongation line segment three isJunction point H respectively (15.625mm ,-5.7476mm),With L (5.7476mm ,-15.625mm),Obtain line segment HW and line segment LW, again by initial point (0mm, 0mm) as rising Point, makes the line segment of an a length of 2.5mm along x-axis positive direction, with the center of circle that (2.5mm ,-1.25mm) is first curve, with (2.5mm, 0mm) is end point, is another end points with (3.75mm ,-1.25mm), radius r₁=1.25mm, making angle of circumference is 90 °, direction is the circular arc protruded to x-axis and y-axis positive direction, with the center of circle that (5mm ,-1.25mm) is second curve, with (3.75mm ,-1.25mm) is end point, is another end points with (6.25mm ,-1.25mm), radius r₂=1.25mm, makes circumference Angle is 180 °, and direction is the circular arc protruded to y-axis negative direction, then with the center of circle that (7.5mm ,-1.25mm) is the 3rd curve, With (6.25mm ,-1.25mm) for end point, it is another end points with (7.5mm, 0mm), radius r₃=1.25mm, makes angle of circumference Being 90 °, direction is the circular arc protruded to x-axis negative direction and y-axis positive direction, with the circle that (7.5mm ,-2.5mm) is the 4th curve The heart, with (7.5mm, 0mm) for end point, is another end points with (10mm ,-2.5mm), radius r₄=2.5mm, making angle of circumference is 90 °, direction is the circular arc protruded to x-axis and y-axis positive direction；With the center of circle that (13.75mm ,-2.5mm) is the 5th curve, with (10mm ,-2.5mm) is end point, is another end points with H (15.625mm ,-5.7476mm), radius r₅=3.75mm, makes circle Round angle is 120 °, and direction is the circular arc protruded to x-axis and y-axis negative direction, obtains initial graphics one, with straight line y=-x as symmetry Axle, carries out initial graphics one minute surface symmetry, obtains initial graphics two, line segment HW, line segment LW, initial graphics one and initial graphics Two merge, and obtain rotating graphs one, by rotating graphs one with pointFor rotating Point, turn clockwise 30 °, 60 °, 90 °, 120 °, 150 °, 180 °, 210 °, 240 °, 270 °, 300 ° and 330 °, respectively obtains rotation Turn figure two, rotating graphs three, rotating graphs four, rotating graphs five, rotating graphs six, rotating graphs seven, rotating graphs eight, rotation Turn figure nine, rotating graphs ten, rotating graphs 11 and rotating graphs 12, rotating graphs one, rotating graphs two, rotating graphs Three, rotating graphs four, rotating graphs five, rotating graphs six, rotating graphs seven, rotating graphs eight, rotating graphs nine, rotating graphs Ten, rotating graphs 11 and rotating graphs 12 merge, and obtain closed figure, are contracted by the radius of the circular coverage rate of closed figure Little for the original 0.32548 times design shape obtaining required metal antenna paster and size, cut out according to design shape and size Cut and obtain metal antenna paster；One end of described cylindrical metal conductor is connected with metal antenna paster, cylindrical metal conductor Material be copper, its bottom surface radius r=0.5mm, thickness d=2.54mm, the company of cylindrical metal conductor and metal antenna paster The center of circle, the place of connecing is respectively 16.59mm, 16.59mm, 13.41mm and 13.41mm with the vertical dimension of four sides of medium substrate；Institute Stating the radius of four cylindrical cavities on medium substrate and be 0.5mm, the circle center line connecting of four cylindrical cavities constitutes the length of side and is The square of 22mm, on this square, following and the upper and lower side of medium substrate vertical dimension is respectively 2.6mm and 5.4mm, just Square left and right side is respectively 2mm and 6mm with the vertical dimension of the medium substrate left and right sides；Relative with cylindrical metal conductor The aperture R=1.9mm of circular hole on earth plate, the output interface of the described cylindrical metal conductor other end and energy management circuit phase Even, this energy management circuit is for storing the energy absorbed.