CN106299652A - Low loss RF collection of energy microstrip antenna - Google Patents

Abstract

The invention discloses a kind of low loss RF collection of energy microstrip 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

Low loss RF collection of energy microstrip 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 Low loss RF collection of energy microstrip antenna.

Background technology

Compare three kinds of wireless transmission methods of current main flow, i.e. way of electromagnetic induction, means of electromagnetic waves and magnetic coupling is humorous Shake mode.Analyze the respective pluses and minuses of these three mode, such as transmission range, through-put power, efficiency of transmission and range of application, Find that electromagnetic wave wireless transmission method has the advantages that to power for low power sensor.

Summary of the invention

Present invention solves the technical problem that and there is provided a kind of simple in construction and low loss RF energy reasonable in design receipts Collection microstrip antenna, this antenna is compared with the less size having for other antenna, the loss of relatively low clawback, good impedance Coupling and higher gain.

The present invention solves that above-mentioned technical problem adopts the following technical scheme that, low loss RF collection of energy microstrip antenna, It is characterized in that including consistent size and dielectric passivation bonded to each other, medium substrate and earth plate, Qi Zhongyu from top to bottom Being pasted with metal antenna paster on the medium substrate of dielectric passivation laminating side, the middle part of medium substrate is provided with and extends vertically through Jie The cylindrical metal conductor of matter substrate, earth plate is provided with the circular hole concentric with cylindrical metal conductor bottom surface；Described medium covers The material of cap rock is Rogers RO6002, DIELECTRIC CONSTANT ε_r=2.94, thickness d=0.51mm, length and width is 30mm； The radius of the circular coverage rate of described metal antenna paster is 0.103852 λ, wherein λ=122mm, and λ is the ripple of 2.45GHz radio frequency Long, 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 central point of 30mm, the central point of metal antenna paster and medium substrate upper surface Position consistency；Design shape and the size of described metal antenna paster meet following requirement, set up plane right-angle coordinate, by former 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 114 ° counterclockwise as the point of rotation and obtain line segment two, by line segment two with straight lineMinute surface is made for axis of symmetry Symmetry obtains line segment three, and the intersection point of line segment two and line segment three isThis point Straight lineOn, again by initial point (0mm, 0mm) as starting point, make the line of an a length of 2.5mm along x-axis positive direction Section, with the center of circle that B (2.5mm ,-1.25mm) is first curve, with A (2.5mm, 0mm) for end point, with B₁(3.75mm ,- 1.25mm) it is another end points, radius r₁=1.25mm, making angle of circumference is 90 °, and direction is to protrude to x-axis and y-axis positive direction Circular arc, 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 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 one End points, with E₁(6.25mm ,-1.25mm) is another end points, radius r₄=0.625mm, making angle of circumference is 180 °, and direction is along y-axis The circular arc that negative direction is protruded, with the center of circle that F (7.5mm ,-1.25mm) is the 5th curve, with E₁(6.25mm ,-1.25mm) is one end Point, with F₁(7.5mm, 0mm) is another end points, radius r₅=1.25mm, making angle of circumference is 90 °, and direction is to x-axis negative direction and y The circular arc that axle positive direction is protruded, with the center of circle that G (7.5mm ,-2.5mm) is the 6th curve, with F₁(7.5mm, 0mm) is one end Point, with G₁(10mm ,-2.5mm) is another end points, radius r₆=2.5mm, making angle of circumference is 90 °, and direction is to x-axis and y-axis The circular arc that positive direction is protruded, with the center of circle that H (11.875mm ,-2.5mm) is the 7th curve, with G₁(10mm ,-2.5mm) is one End points, with H₁(13.75mm ,-2.5mm) is another end points, radius r₇=1.875mm, making angle of circumference is 180 °, and direction is to y The circular arc that axle negative direction is protruded, with the center of circle that I (16.25mm ,-2.5mm) is the 8th curve, with H₁(13.75mm ,-2.5mm) For end point, with I₁(16.25mm, 0mm) is another end points, radius r₈=2.5mm, making angle of circumference is 90 °, and direction is to x-axis The circular arc that negative direction and y-axis positive direction are protruded, with I₁(16.25mm, 0mm) is end point, and b (18mm, 0mm) is another end points, Make the line segment of an a length of 1.75mm, in x-axis and y-axis plane, obtain initial graphics one, by initial graphics one 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 Merge and obtain rotating graphs one, by rotating graphs one with pointFor the point of rotation, clockwise Rotate 72 °, obtain rotating graphs two, by rotating graphs one with pointFor the point of rotation, suitable Hour hands rotate 144 °, obtain rotating graphs three, by rotating graphs one with pointFor rotating Point, turns clockwise 216 °, obtains rotating graphs four, by rotating graphs one with point For the point of rotation, turn clockwise 288 °, obtain rotating graphs five, rotating graphs one, rotating graphs two, rotating graphs three, rotation Figure four and rotating graphs five merging obtain closed figure, by the reduced radius of the circular coverage rate of closed figure to original 0.40639 times of design shape obtaining required metal antenna paster and size, obtain metal according to design shape and size cutting Antenna patch；One end of described cylindrical metal conductor is connected with metal antenna paster, and the material of cylindrical metal conductor is copper, The center of circle, junction of its bottom surface radius r=0.5mm, thickness d=2.54mm, cylindrical metal conductor and metal antenna paster and Jie The vertical dimension of four sides of matter substrate is respectively 16.59mm, 16.59mm, 13.41mm and 13.41mm, leads with cylindrical metal The aperture R=1.9mm of circular hole on the earth plate that body is relative, the output interface of the described cylindrical metal conductor other end and energy pipe Reason circuit is connected, and this energy management circuit is for storing the energy absorbed.

The technique effect of the present invention is: low loss RF collection of energy microstrip 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 low loss RF collection of energy microstrip antenna structure schematic diagram；

Fig. 3 is that the echo of the low loss RF collection of energy microstrip antenna utilizing the simulation of HFSS antenna modeling simulation software damages Consumption figure；

Fig. 4 is the standing-wave ratio of the low loss RF collection of energy microstrip antenna utilizing the simulation of HFSS antenna modeling simulation software Figure.

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 low loss RF collection of energy microstrip antenna designs, needs when microstrip antenna designs Size to the metal antenna paster of low loss RF collection of energy microstrip antenna, the size of medium substrate, thickness carry out theory On estimation, more quickly the low loss RF energy of applicable characteristic frequency could be found accurately to receive simulation experiment when Collection microstrip 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, low loss RF collection of energy microstrip 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 Metal antenna paster 4, the middle part of medium substrate 2 is provided with the cylindrical metal conductor 5 extending vertically through medium substrate 2, on earth plate 3 It is provided with the circular hole 6 concentric with cylindrical metal conductor 5 bottom surface；The material of described dielectric passivation 1 is Rogers RO6002, is situated between Electric constant ε_r=2.94, thickness d=0.51mm, length and width is 30mm；The circular coverage rate of described metal antenna paster 4 Radius be 0.103852 λ, wherein λ=122mm, λ is the wavelength of 2.45GHz radio frequency, and thickness is 0.02mm, and material is copper, institute The material stating medium substrate 2 is Rogers RO6010, DIELECTRIC CONSTANT ε_r=10.2, thickness d=2.54mm, length and width is equal For 30mm, the central point of metal antenna paster 4 is consistent with the center position of medium substrate 2 upper surface；Described metal antenna pastes The design shape of sheet 4 and size meet following requirement, set up plane right-angle coordinate, by initial point (0mm, 0mm) as starting point, edge X-axis positive direction makes the line segment one of an a length of 18mm, is rotated counterclockwise as the point of rotation with point (18mm, 0mm) by line segment one 114 ° obtain 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 line The intersection point of section three isThis point is at straight lineOn, 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 song with B (2.5mm ,-1.25mm) The center of circle of line, with A (2.5mm, 0mm) for end point, with B₁(3.75mm ,-1.25mm) is another end points, 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) for second The center of circle of individual 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 °, direction be along y-axis negative direction protrude circular arc, with D (4.6875mm ,- 1.25mm) it is the center of circle of the 3rd curve, with C₁(4.375mm ,-1.25mm) is end point, with D₁(5mm ,-1.25mm) is another End point, 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) it is another end points, radius r₄=0.625mm, making angle of circumference is 180 °, and direction is the circle protruded along y-axis negative direction Arc, with the center of circle that F (7.5mm ,-1.25mm) is 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 to x-axis negative direction and y-axis is just The circular arc that direction is protruded, 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 °, and direction is to x-axis and y-axis positive direction The circular arc protruded, 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, making angle of circumference is 180 °, and direction is to bear to y-axis The circular arc that direction is protruded, with the center of circle that I (16.25mm ,-2.5mm) is the 8th curve, with H₁(13.75mm ,-2.5mm) is one End points, with I₁(16.25mm, 0mm) is another end points, radius r₈=2.5mm, making angle of circumference is 90 °, and direction is to x-axis losing side To and y-axis positive direction protrude circular arc, with I₁(16.25mm, 0mm) is end point, and b (18mm, 0mm) is another end points, makees one The line segment of a length of 1.75mm, obtains initial graphics one, by initial graphics one with straight line in x-axis and y-axis planeFor Axis of symmetry is made minute surface symmetry and is obtained initial graphics two, and initial graphics one, initial graphics two, line segment two and line segment three merging are revolved Turn figure one, by rotating graphs one with pointFor the point of rotation, turn clockwise 72 °, Obtain rotating graphs two, by rotating graphs one with pointFor the point of rotation, dextrorotation Turn 144 °, obtain rotating graphs three, by rotating graphs one with pointFor the point of rotation, suitable Hour hands rotate 216 °, obtain rotating graphs four, by rotating graphs one with pointFor rotation Turning point, turns clockwise 288 °, obtains rotating graphs five, rotating graphs one, rotating graphs two, rotating graphs three, rotating graphs Four and rotating graphs five merge obtain closed figure, by the reduced radius of the circular coverage rate of closed figure to original 0.40639 times of design shape obtaining required metal antenna paster 4 and size, obtain metal according to design shape and size cutting Antenna patch 4；One end of described cylindrical metal conductor 5 is connected with metal antenna paster 4, the material of cylindrical metal conductor 5 For copper, its bottom surface radius r=0.5mm, thickness d=2.54mm, cylindrical metal conductor 5 and the junction of metal antenna paster 4 The center of circle is respectively 16.59mm, 16.59mm, 13.41mm and 13.41mm, with circle with the vertical dimension of 2 four sides of medium substrate The aperture R=1.9mm of circular hole 6 on the earth plate 3 that cylindricality metallic conductor 5 is relative, described cylindrical metal conductor 5 other end defeated Outgoing interface is connected with energy management circuit, and this energy management circuit is for storing the energy absorbed.

Fig. 3 is that the echo of the low loss RF collection of energy microstrip antenna utilizing the simulation of HFSS antenna modeling simulation software damages Consumption figure, as seen from the figure, the return loss of this low loss RF collection of energy microstrip antenna is-43dB, than other same volume sky The return loss of line is also little, and performance is the best.

Fig. 4 is the standing-wave ratio of the low loss RF collection of energy microstrip antenna utilizing the simulation of HFSS antenna modeling simulation software Figure, as seen from the figure, this low loss RF collection of energy microstrip antenna is 1.0136 in the standing-wave ratio of 2.45GHz, 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. low loss RF collection of energy microstrip antenna, it is characterised in that include consistent size and Jie bonded to each other from top to bottom Matter cover layer, medium substrate and earth plate, be wherein pasted with metal antenna with on the medium substrate of dielectric passivation laminating side Paster, the middle part of medium substrate is provided with the cylindrical metal conductor extending vertically through medium substrate, and earth plate is provided with cylindrical The circular hole that metallic conductor bottom surface is concentric；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 radius of the circular coverage rate of described metal antenna paster is 0.103852 λ, wherein λ=122mm, λ is the wavelength of 2.45GHz radio frequency, and thickness is 0.02mm, and material is copper, the material of described medium substrate For Rogers RO6010, DIELECTRIC CONSTANT ε_r=10.2, thickness d=2.54mm, length and width is 30mm, and metal antenna pastes The central point of sheet is consistent with the center position of medium substrate upper surface；The design shape of described metal antenna paster and size are full The following requirement of foot, 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 114 ° 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, again by initial point (0mm, 0mm) conduct Starting point, makes the line segment of an a length of 2.5mm along x-axis positive direction, with the center of circle that B (2.5mm ,-1.25mm) is first curve, With A (2.5mm, 0mm) for end point, with B₁(3.75mm ,-1.25mm) is another end points, radius r₁=1.25mm, makes circumference Angle is 90 °, and direction is the circular arc protruded to x-axis and y-axis positive direction, is second curve with C (4.0625mm ,-1.25mm) The center of circle, 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, with D (4.6875mm ,-1.25mm) is The center of circle of the 3rd curve, with C₁(4.375mm ,-1.25mm) is end point, with D₁(5mm ,-1.25mm) is another end points, half Footpath r₃=0.3125mm, making angle of circumference is 180 °, direction be along y-axis positive direction protrude circular arc, with E (5.625mm ,- 1.25mm) it 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 °, direction be along y-axis negative direction protrude circular arc, with F (7.5mm ,- 1.25mm) it is the center of circle of the 5th curve, with E₁(6.25mm ,-1.25mm) is end point, with F₁(7.5mm, 0mm) is the other end Point, 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) 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 point, 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) is the center of circle of the 7th curve, with G₁(10mm ,-2.5mm) is end point, with H₁(13.75mm ,- 2.5mm) it is another end points, radius r₇=1.875mm, making angle of circumference is 180 °, and direction is the circle protruded to y-axis negative direction Arc, 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, making angle of circumference is 90 °, and direction is to x-axis negative direction and y-axis The circular arc that positive direction is protruded, with I₁(16.25mm, 0mm) is end point, and b (18mm, 0mm) is another end points, makees one a length of The line segment of 1.75mm, obtains initial graphics one, by initial graphics one with straight line in x-axis and y-axis planeFor symmetry Axle is made minute surface symmetry and is obtained initial graphics two, and initial graphics one, initial graphics two, line segment two and line segment three merging obtain rotation figure Shape one, by rotating graphs one with pointFor the point of rotation, turn clockwise 72 °, To rotating graphs two, by rotating graphs one with pointFor the point of rotation, turn clockwise 144 °, obtain rotating graphs three, by rotating graphs one with pointFor the point of rotation, suitable Hour hands rotate 216 °, obtain rotating graphs four, by rotating graphs one with pointFor rotation Turning point, turns clockwise 288 °, obtains rotating graphs five, rotating graphs one, rotating graphs two, rotating graphs three, rotating graphs Four and rotating graphs five merge obtain closed figure, by the reduced radius of the circular coverage rate of closed figure to original 0.40639 times of design shape obtaining required metal antenna paster and size, obtain metal according to design shape and size cutting Antenna patch；One end of described cylindrical metal conductor is connected with metal antenna paster, and the material of cylindrical metal conductor is copper, The center of circle, junction of its bottom surface radius r=0.5mm, thickness d=2.54mm, cylindrical metal conductor and metal antenna paster and Jie The vertical dimension of four sides of matter substrate is respectively 16.59mm, 16.59mm, 13.41mm and 13.41mm, leads with cylindrical metal The aperture R=1.9mm of circular hole on the earth plate that body is relative, the output interface of the described cylindrical metal conductor other end and energy pipe Reason circuit is connected, and this energy management circuit is for storing the energy absorbed.