CN106252864A - Heptangle conversion electromagnetic energy reception antenna - Google Patents

Abstract

The invention discloses a kind of heptangle conversion electromagnetic energy reception 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 the cylindrical metal conductor extending vertically through medium substrate, 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

Heptangle conversion electromagnetic energy reception 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 Heptangle conversion electromagnetic energy reception antenna.

Background technology

Wireless energy transmission technology have in the industries such as household electrical appliance, commercial production and biologic medical wide application and Market prospect, thus wireless energy transmission technology can bring substantial amounts of economic interests, becomes economic new growing point.Along with electronics Consumer product rapidly universal and the electronic product power consumption such as smart mobile phone, digital camera of today is big, fill whenever and wherever possible Strongly, and charger carries and inconvenient in the requirement of electricity, and the charging inlet between various electrical equipment is not consistent, it is possible to Time charge everywhere and the unified charging platform of interface has sizable market potential.Therefore, low-power wireless energy transmission System has more wide market prospect.

Summary of the invention

Present invention solves the technical problem that and there is provided a kind of simple in construction and heptangle reasonable in design conversion electromagnetic energy Reception antenna, this antenna is compared with the less size having for other antenna, the loss of relatively low clawback, good impedance Join and higher gain.

The present invention solves that above-mentioned technical problem adopts the following technical scheme that, heptangle conversion electromagnetic energy reception antenna, its It is characterised by 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 The cylindrical metal conductor of substrate, earth plate is provided with the circular hole concentric with cylindrical metal conductor bottom surface；Described dielectric overlay The material of layer is Rogers RO6002, DIELECTRIC CONSTANT ε_r=2.94, thickness d=0.51mm, length and width is 30mm；Institute The radius of the circular coverage rate stating metal antenna paster is 0.1086 λ, wherein λ=122mm, and λ is the wavelength of 2.45GHz radio frequency, Thickness is 0.02mm, and material is copper, and the material of described medium substrate 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 and medium substrate upper surface Unanimously；Design shape and the size of described metal antenna paster meet following requirement, set up plane right-angle coordinate, by initial point (0mm, 0mm), as starting point, makes the line segment one of an a length of 18mm along x-axis positive direction, by line segment one with point (18mm, 0mm) Rotate 105 ° as the point of rotation counterclockwise and obtain line segment two, by line segment two with straight lineMinute surface is made symmetrical for axis of symmetry Obtaining line segment three, the intersection point of line segment two and line segment three isThis point is at straight lineOn, by the intersecting lens of line segment two and line segment three at straight lineThe shorter line segment part in both sides is left out respectively, 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, with B (2.5mm ,- 1.25mm) it is the center of circle of first curve, with A (2.5mm, 0mm) for end point, with B₁(3.75mm ,-1.25mm) is the other end Point, radius r₁=1.25mm, making angle of circumference is 90 °, and direction is the circular arc protruded to x-axis and y-axis positive direction, with C (4.0625mm ,-1.25mm) is the center of circle of second curve, with B₁(3.75mm ,-1.25mm) is end point, with C₁ (4.375mm ,-1.25mm) is another end points, radius r₂=0.3125mm, making angle of circumference is 180 °, and direction is along y-axis losing side To the circular arc protruded, with the center of circle that D (4.6875mm ,-1.25mm) is the 3rd curve, with C₁(4.375mm ,-1.25mm) is End point, with D₁(5mm ,-1.25mm) is another end points, radius r₃=0.3125mm, making angle of circumference is 180 °, and direction is along y The circular arc that axle positive direction is protruded, with the center of circle that E (5.625mm ,-1.25mm) is the 4th curve, with D₁(5mm ,-1.25mm) is End point, with E₁(6.25mm ,-1.25mm) is another end points, radius r₄=0.625mm, making angle of circumference is 180 °, and direction is The circular arc protruded along y-axis negative direction, with the center of circle that F (7.5mm ,-1.25mm) is the 5th curve, with E₁(6.25mm ,- 1.25mm) it is end point, with F₁(7.5mm, 0mm) is another end points, radius r₅=1.25mm, making angle of circumference is 90 °, direction For the circular arc protruded to x-axis negative direction and y-axis positive direction, with the center of circle that G (7.5mm ,-2.5mm) is the 6th curve, with F₁ (7.5mm, 0mm) is end point, with G₁(10mm ,-2.5mm) is another end points, radius r₆=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 H (11.875mm ,-2.5mm) is the 7th curve, with G₁ (10mm ,-2.5mm) is end point, with H₁(13.75mm ,-2.5mm) is another end points, radius r₇=1.875mm, makes circumference Angle is 180 °, and direction is the circular arc protruded to y-axis negative direction, with the center of circle that I (16.25mm ,-2.5mm) is the 8th curve, with H₁(13.75mm ,-2.5mm) is end point, with I₁(16.25mm, 0mm) is another end points, radius r₈=2.5mm, makes circumference Angle is 90 °, and direction is the circular arc protruded to x-axis negative direction and y-axis positive direction, with I₁(16.25mm, 0mm) is end point, b (18mm, 0mm) is another end points, makees the line segment of an a length of 1.75mm, obtains initial graphics one in x-axis and y-axis plane；Will Initial graphics one is with straight lineMake minute surface symmetry for axis of symmetry and obtain initial graphics two, initial graphics one, initial graphics Two, line segment two and line segment three merging obtain rotating graphs one, by rotating graphs one with point For the point of rotation, turn clockwise successively 52 °, 104 °, 156 °, 208 °, 260 °, 312 ° and 364 ° respectively obtain rotating graphs two, Rotating graphs three, rotating graphs four, rotating graphs five, rotating graphs six and rotating graphs seven, rotating graphs one, rotating graphs Two, rotating graphs three, rotating graphs four, rotating graphs five, rotating graphs six and rotating graphs seven merging obtain closed figure, will The reduced radius of the circular coverage rate of closed figure to original 0.5388 times finally gives the design shape of metal antenna paster And size, then according to above-mentioned shape and size cut out metal antenna paster；One end of described cylindrical metal conductor and gold Belonging to antenna patch to connect, the material of cylindrical metal conductor is copper, its bottom surface radius r=0.5mm, thickness d=2.54mm, cylinder Shape metallic conductor is respectively with the vertical dimension of four sides of medium substrate with the center of circle, junction of metal antenna paster 16.58mm, 16.58mm, 13.42mm and 13.42mm, the aperture R=of circular hole on the earth plate relative with cylindrical metal conductor 1.9mm, the output interface of the described cylindrical metal conductor other end is connected with energy management circuit, and this energy management circuit is used for The energy absorbed is stored.

The technique effect of the present invention is: heptangle conversion electromagnetic energy reception antenna 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.

Accompanying drawing explanation

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

Fig. 2 is that heptangle converts electromagnetic energy reception antenna structural representation；

Fig. 3 is the return loss of the heptangle conversion electromagnetic energy reception antenna utilizing the simulation of HFSS antenna modeling simulation software Figure；

Fig. 4 is that the heptangle conversion electromagnetic energy reception antenna utilizing the simulation of HFSS antenna modeling simulation software is in XZ plane Gain diagram.

In figure: 1, dielectric passivation, 2, medium substrate, 3, earth plate, 4, metal antenna paster, 5, cylindrical metal leads Body, 6, 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 heptangle conversion electromagnetic energy reception antenna design, and it is right to need when microstrip antenna designs The size of the metal antenna paster of heptangle conversion electromagnetic energy reception antenna, the size of medium substrate, thickness carry out theoretic Estimation, more quickly could find the heptangle conversion electromagnetic energy of applicable characteristic frequency to receive simulation experiment when accurately Antenna.So below as a example by rectangular microstrip antenna, the theoretical calculation method of explanation each data parameters of microstrip antenna.

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, heptangle conversion electromagnetic energy reception antenna, including consistent size from top to bottom and bonded to each other Dielectric passivation 1, medium substrate 2 and earth plate 3, the medium substrate 2 of side of wherein fitting with dielectric passivation 1 is pasted with gold Belonging to antenna patch 4, the middle part of medium substrate 2 is provided with the cylindrical metal conductor 5 extending vertically through medium substrate 2, earth plate 3 sets There is the circular hole 6 concentric with cylindrical metal conductor 5 bottom surface；The material of described dielectric passivation 1 is RogersRO6002, and dielectric is normal Number ε_r=2.94, thickness d=0.51mm, length and width is 30mm；The half of the circular coverage rate of described metal antenna paster 4 Footpath is 0.1086 λ, wherein λ=122mm, and λ is the wavelength of 2.45GHz radio frequency, and thickness is 0.02mm, and material is copper, described medium The material of substrate 2 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 4 is consistent with the center position of medium substrate 2 upper surface；Setting of described metal antenna paster 4 Meter shape and size meet following requirement, set up plane right-angle coordinate, by initial point (0mm, 0mm) as starting point, square along x-axis To making the line segment one of an a length of 18mm, line segment one is rotated 105 ° with point (18mm, 0mm) counterclockwise as the point of rotation and obtains Line segment two, by line segment two with straight lineMake minute surface symmetry for axis of symmetry and obtain line segment three；Line segment two and the friendship of line segment three Point isThis point is at straight lineOn, by line segment two and line segment three Intersecting lens is at straight lineThe shorter line segment part in both sides is left out respectively, again by initial point (0mm, 0mm) as starting point, The line segment of an a length of 2.5mm is made, with the center of circle that B (2.5mm ,-1.25mm) is first curve, with A along x-axis positive direction (2.5mm, 0mm) is end point, with B₁(3.75mm ,-1.25mm) is another end points, 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 C (4.0625mm ,-1.25mm) is second curve, With B₁(3.75mm ,-1.25mm) is end point, with C₁(4.375mm ,-1.25mm) is another end points, radius r₂=0.3125mm, Making angle of circumference is 180 °, and direction is the circular arc protruded along y-axis negative direction, is the 3rd song with D (4.6875mm ,-1.25mm) The center of circle of line, with C₁(4.375mm ,-1.25mm) is end point, with D₁(5mm ,-1.25mm) is another end points, radius r₃= 0.3125mm, making angle of circumference is 180 °, and direction is the circular arc protruded along y-axis positive direction, with E (5.625mm ,-1.25mm) is The center of circle of the 4th curve, with D₁(5mm ,-1.25mm) is end point, with E₁(6.25mm ,-1.25mm) is another end points, radius r₄=0.625mm, making angle of circumference is 180 °, and direction is the circular arc protruded along y-axis negative direction, with F (7.5mm ,-1.25mm) is The center of circle of the 5th curve, with E₁(6.25mm ,-1.25mm) is end point, with F₁(7.5mm, 0mm) is another end points, radius r₅ =1.25mm, making angle of circumference is 90 °, and direction is the circular arc protruded to x-axis negative direction and y-axis positive direction, with G (7.5mm ,- 2.5mm) it is the center of circle of the 6th curve, with F₁(7.5mm, 0mm) is end point, with G₁(10mm ,-2.5mm) is another end points, Radius r₆=2.5mm, making angle of circumference is 90 °, and direction is the circular arc protruded to x-axis and y-axis positive direction, with H (11.875mm ,- 2.5mm) it is the center of circle of the 7th curve, with G₁(10mm ,-2.5mm) is end point, with H₁(13.75mm ,-2.5mm) is another End points, radius r₇=1.875mm, making angle of circumference is 180 °, and direction is the circular arc protruded to y-axis negative direction, with I (16.25mm ,-2.5mm) is the center of circle of the 8th curve, with H₁(13.75mm ,-2.5mm) is end point, with I₁(16.25mm, 0mm) it is another end points, radius r₈=2.5mm, making angle of circumference is 90 °, and direction is to protrude to x-axis negative direction and y-axis positive direction Circular arc, with I₁(16.25mm, 0mm) is end point, and b (18mm, 0mm) is another end points, makees the line of an a length of 1.75mm Section, obtains initial graphics one, by initial graphics one with straight line in x-axis and y-axis planeMinute surface pair is made for axis of symmetry Claiming to obtain initial graphics two, initial graphics one, initial graphics two, line segment two and line segment three merging obtain rotating graphs one, will rotation Turn figure one with pointFor the point of rotation, turn clockwise successively 52 °, 104 °, 156 °, 208 °, 260 °, 312 ° and 364 ° respectively obtain rotating graphs two, rotating graphs three, rotating graphs four, rotating graphs five, Rotating graphs six and rotating graphs seven, rotating graphs one, rotating graphs two, rotating graphs three, rotating graphs four, rotating graphs Five, rotating graphs six and rotating graphs seven merging obtain closed figure, the reduced radius of the circular coverage rate of closed figure are arrived 0.5388 times of design shape finally giving metal antenna paster 4 originally and size, then according to above-mentioned shape and size are cut out Cut metal antenna paster 4；One end of described cylindrical metal conductor 5 is connected with metal antenna paster 4, cylindrical metal conductor The material of 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 16.58mm, 16.58mm, 13.42mm and 13.42mm, the aperture R=1.9mm of circular hole on the earth plate 3 relative with cylindrical metal conductor 5, described cylindrical metal conductor The output interface of 5 other ends is connected with energy management circuit, and this energy management circuit is for storing the energy absorbed.

Fig. 3 is the return loss of the heptangle conversion electromagnetic energy reception antenna utilizing the simulation of HFSS antenna modeling simulation software Figure, as seen from the figure, the return loss of this heptangle conversion electromagnetic energy reception antenna is-43dB, than other same volume antenna Return loss is also little, and performance is the best.

Fig. 4 is that the heptangle conversion electromagnetic energy reception antenna utilizing the simulation of HFSS antenna modeling simulation software is in XZ plane Gain diagram, as seen from the figure, this heptangle conversion electromagnetic energy reception antenna reach maximum gain 3.48dB at 0 °, directivity is very Stable.

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. heptangle conversion electromagnetic energy reception antenna, it is characterised in that include consistent size and medium bonded to each other from top to bottom Cover layer, medium substrate and earth plate, be wherein pasted with metal antenna patch with on the medium substrate of dielectric passivation laminating side Sheet, the middle part of medium substrate is provided with the cylindrical metal conductor extending vertically through medium substrate, and earth plate is provided with and cylinder gold Belong to the circular hole that conductor bottom surface is concentric；The material of described dielectric passivation is Rogers RO6002, DIELECTRIC CONSTANT ε_r=2.94, thick Degree d=0.51mm, length and width is 30mm；The radius of the circular coverage rate of described metal antenna paster is 0.1086 λ, its Middle λ=122mm, λ are the wavelength of 2.45GHz radio frequency, and thickness is 0.02mm, and material is copper, and the material of described medium substrate is Rogers RO6010, DIELECTRIC CONSTANT ε_r=10.2, thickness d=2.54mm, length and width is 30mm, metal antenna paster Central point consistent with the center position of medium substrate upper surface；The design shape of described metal antenna paster and size meet Following requirement, sets up plane right-angle coordinate, by initial point (0mm, 0mm) as starting point, along x-axis positive direction make one a length of The line segment one of 18mm, counterclockwise rotates 105 ° with point (18mm, 0mm) as the point of rotation by line segment one and obtains line segment two, by line segment Two with straight lineMaking minute surface symmetry for axis of symmetry and obtain line segment three, the intersection point of line segment two and line segment three isThis point is at straight lineOn, intersecting line segment two and line segment three Line is at straight lineThe shorter line segment part in both sides is left out, respectively again by initial point (0mm, 0mm) as starting point, along x-axis Positive direction makes the line segment of an a length of 2.5mm, with the center of circle that B (2.5mm ,-1.25mm) is first curve, with A (2.5mm, 0mm) it is end point, with B₁(3.75mm ,-1.25mm) is another end points, radius r₁=1.25mm, making angle of circumference is 90 °, side To the circular arc for protruding to x-axis and y-axis positive direction, with the center of circle that C (4.0625mm ,-1.25mm) is second curve, with B₁ (3.75mm ,-1.25mm) is end point, with C₁(4.375mm ,-1.25mm) is another end points, radius r₂=0.3125mm, makes Angle of circumference is 180 °, and direction is the circular arc protruded along y-axis negative direction, is the 3rd curve with D (4.6875mm ,-1.25mm) The center of circle, with C₁(4.375mm ,-1.25mm) is end point, with D₁(5mm ,-1.25mm) is another end points, radius r₃= 0.3125mm, making angle of circumference is 180 °, and direction is the circular arc protruded along y-axis positive direction, with E (5.625mm ,-1.25mm) is The center of circle of the 4th curve, with D₁(5mm ,-1.25mm) is end point, with E₁(6.25mm ,-1.25mm) is another end points, radius r₄=0.625mm, making angle of circumference is 180 °, and direction is the circular arc protruded along y-axis negative direction, with F (7.5mm ,-1.25mm) is The center of circle of the 5th curve, with E₁(6.25mm ,-1.25mm) is end point, with F₁(7.5mm, 0mm) is another end points, radius r₅ =1.25mm, making angle of circumference is 90 °, and direction is the circular arc protruded to x-axis negative direction and y-axis positive direction, with G (7.5mm ,- 2.5mm) it is the center of circle of the 6th curve, with F₁(7.5mm, 0mm) is end point, with G₁(10mm ,-2.5mm) is another end points, Radius r₆=2.5mm, making angle of circumference is 90 °, and direction is the circular arc protruded to x-axis and y-axis positive direction, with H (11.875mm ,- 2.5mm) it is the center of circle of the 7th curve, with G₁(10mm ,-2.5mm) is end point, with H₁(13.75mm ,-2.5mm) is another End points, radius r₇=1.875mm, making angle of circumference is 180 °, and direction is the circular arc protruded to y-axis negative direction, with I (16.25mm ,-2.5mm) is the center of circle of the 8th curve, with H₁(13.75mm ,-2.5mm) is end point, with I₁(16.25mm, 0mm) it is another end points, radius r₈=2.5mm, making angle of circumference is 90 °, and direction is to protrude to x-axis negative direction and y-axis positive direction Circular arc, with I₁(16.25mm, 0mm) is end point, and b (18mm, 0mm) is another end points, makees the line of an a length of 1.75mm Section, obtains initial graphics one in x-axis and y-axis plane；By initial graphics one with straight lineMinute surface pair is made for axis of symmetry Claiming to obtain initial graphics two, initial graphics one, initial graphics two, line segment two and line segment three merging obtain rotating graphs one, will rotation Turn figure one with pointFor the point of rotation, turn clockwise successively 52 °, 104 °, 156 °, 208 °, 260 °, 312 ° and 364 ° respectively obtain rotating graphs two, rotating graphs three, rotating graphs four, rotating graphs five, Rotating graphs six and rotating graphs seven, rotating graphs one, rotating graphs two, rotating graphs three, rotating graphs four, rotating graphs Five, rotating graphs six and rotating graphs seven merging obtain closed figure, the reduced radius of the circular coverage rate of closed figure are arrived 0.5388 times of design shape finally giving metal antenna paster originally and size, then according to above-mentioned shape and size cutting Go out metal antenna paster；One end of described cylindrical metal conductor is connected with metal antenna paster, the material of cylindrical metal conductor Material is the junction of copper, its bottom surface radius r=0.5mm, thickness d=2.54mm, cylindrical metal conductor and metal antenna paster The center of circle is respectively 16.58mm, 16.58mm, 13.42mm and 13.42mm, with cylinder with the vertical dimension of four sides of medium substrate The aperture R=1.9mm of circular hole on the earth plate that shape metallic conductor is relative, the output interface of the described cylindrical metal conductor other end Being connected with energy management circuit, this energy management circuit is for storing the energy absorbed.