CN106252869A - Electromagnetic wave energy collection system - Google Patents

Abstract

The invention discloses a kind of electromagnetic wave energy collection system, including consistent size from top to bottom and medium substrate bonded to each other and earth plate, wherein it is pasted with metal antenna paster on medium substrate, 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

Electromagnetic wave energy collection system

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 Electromagnetic wave energy collection system.

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 there is provided a kind of simple in construction and electromagnetic wave energy reasonable in design collects system System, this antenna is compared with the less size having for other antenna, the loss of relatively low clawback, good impedance matching and relatively High gain.

The present invention solves that above-mentioned technical problem adopts the following technical scheme that, electromagnetic wave energy collection system, its feature exists In including consistent size and medium substrate bonded to each other and earth plate from top to bottom, wherein on medium substrate, it is pasted with metal sky Line 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 and cylinder The circular hole that shape metallic conductor bottom surface is concentric；The radius of the circular coverage rate of described metal antenna paster is 0.1091 λ, wherein λ= 121mm, λ are the wavelength of 2.48GHz 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, the central point of metal antenna paster Consistent with the center position of medium substrate upper surface；The design shape of described metal antenna paster and size meet to be wanted as follows Asking, set up plane right-angle coordinate, by initial point (0mm ,-2.5mm) as starting point, (13.75mm ,-2.5mm) is another end points edge X-axis positive direction makes the line segment one of an a length of 13.75mm；With point (13.75mm ,-2.5mm) for the point of rotation, by line segment one edge Counterclockwise rotate 125 °, with curvilinear equationIntersection point be H (15.901mm ,- 5.572mm), make minute surface symmetry with straight line y=-x for axis of symmetry and obtain a L (5.572mm ,-15.901mm), then along line segment one with X-axis angle is the direction of 55 °, extends to original 3 times, be extended line segment two, by extended line in coordinate axes the 4th interval Section two is made minute surface symmetry with straight line y=-x for axis of symmetry and is extended line segment three, extends line segment two and extends the intersection point of line segment three ForDifference junction point H (15.901mm ,-5.572mm),With L (5.572mm ,-15.901mm),Obtain line segment HW and line segment LW, again initial point (0mm, 0mm) is made Antenna patch shape design is carried out according to below equation for starting point:

Y=0 (0≤x≤2.5) (1)

$\begin{array}{ccc}y=\sqrt{-x^2+5x-4.6875}-1.25& (-1.25\≤y\≤0)& (2.5\≤x\≤3.75)\end{array}---\left(2\right)$

$\begin{array}{ccc}y=\sqrt{-x^2+10x-23.4375}-1.25& (-2.5\≤y\≤-1.25)& (3.75\≤x\≤6.25)\end{array}---\left(3\right)$

$\begin{array}{ccc}y=\sqrt{-x^2+15x-54.6875}-1.25& (-1.25\≤y\≤0)& (6.25\≤x\≤7.5)\end{array}---\left(4\right)$

$\begin{array}{ccc}y=\sqrt{-x^2+15x-50}-2.5& (-2.5\≤y\≤0)& (7.5\≤x\≤10)\end{array}---\left(5\right)$

$\begin{array}{ccc}y=\sqrt{-x^2+27.5x-175}-2.5& (-6.25\≤y\≤-5.572)& (10\≤x\≤15.901)\end{array}---\left(6\right)$

By being joined end to end successively by the whole curves obtained by formula, obtain 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 merging obtain rotating graphs one, by rotating graphs one with pointFor rotation Turning point, turns clockwise 20 ° and entirety is reduced into original 0.8 times, obtains rotating graphs two, by rotating graphs one with pointFor the point of rotation, turn clockwise 40 °, obtain rotating graphs three, will Rotating graphs one is with pointFor the point of rotation, turn clockwise 60 ° and whole Body is reduced into original 0.8 times, obtains rotating graphs four, by rotating graphs one with pointFor the point of rotation, turn clockwise 80 °, obtain rotating graphs five, will Rotating graphs one is with pointFor the point of rotation, turn clockwise 100 ° also Entirety is reduced into original 0.8 times, obtains rotating graphs six, by rotating graphs one with pointFor the point of rotation, turn clockwise 120 °, obtain rotating graphs seven, By rotating graphs one with pointFor the point of rotation, turn clockwise 140 ° also Entirety is reduced into original 0.8 times, obtains rotating graphs eight, by rotating graphs one with pointFor the point of rotation, turn clockwise 160 °, obtain rotating graphs nine, will Rotating graphs one is with pointFor the point of rotation, turn clockwise 180 ° and whole Body is reduced into original 0.8 times, obtains rotating graphs ten, by rotating graphs one with pointFor the point of rotation, turn clockwise 200 °, obtain rotating graphs ten One, by rotating graphs one with pointFor the point of rotation, turn clockwise 220 ° and overall be reduced into original 0.8 times, obtain rotating graphs 12, by rotating graphs one with pointFor the point of rotation, turn clockwise 240 °, obtain rotating graphs ten Three, by rotating graphs one with pointFor the point of rotation, turn clockwise 260 ° and overall be reduced into original 0.8 times, obtain rotating graphs 14, by rotating graphs one with pointFor the point of rotation, turn clockwise 280 °, obtain rotating graphs 15, By rotating graphs one with pointFor the point of rotation, turn clockwise 300 ° also Entirety is reduced into original 0.8 times, obtains rotating graphs 16, by rotating graphs one with pointFor the point of rotation, turn clockwise 320 °, obtain rotating graphs ten Seven, by rotating graphs one with pointFor the point of rotation, turn clockwise 340 ° and overall be reduced into original 0.8 times, obtain rotating graphs 18, 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, rotating graphs 12, rotating graphs 13, rotating graphs 14, rotating graphs 15, rotating graphs 16, rotating graphs 17 and rotating graphs ten octadentate obtain closed figure, contracts the circular coverage rate radius of closed figure Little for the original 0.24377 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 16.5mm, 16.5mm, 13.5mm and 13.5mm, 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.

The technique effect of the present invention is: electromagnetic wave energy collection system has lower return loss, good impedance Join and standing wave 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 electromagnetic wave energy collection system structural representation；

Fig. 3 is the return loss plot of the electromagnetic wave energy collection system utilizing the simulation of HFSS antenna modeling simulation software；

Fig. 4 is the electromagnetic wave energy collection system input impedance figure utilizing the simulation of HFSS antenna modeling simulation software.

In figure: 1, medium substrate, 2, earth plate, 3, metal antenna paster, 4, cylindrical metal conductor, 5, 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 the design of electromagnetic wave energy collection system, needs electromagnetic wave when microstrip antenna designs The size of the metal antenna paster of energy collecting system, the size of medium substrate, thickness carries out theoretic estimation, could be at mould The electromagnetic wave energy collection system of applicable characteristic frequency is more quickly found accurately the when of draft experiment.So below with rectangle As a example by 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, electromagnetic wave energy collection system, including consistent size from top to bottom and medium substrate bonded to each other 1 and earth plate 2, wherein it is pasted with metal antenna paster 3 on medium substrate 1, the middle part of medium substrate 1 is provided with and extends vertically through medium The cylindrical metal conductor 4 of substrate 1, earth plate 2 is provided with the circular hole 5 concentric with cylindrical metal conductor 4 bottom surface；Described metal The radius of the circular coverage rate of antenna patch 3 is 0.1091 λ, wherein λ=121mm, and λ is the wavelength of 2.48GHz radio frequency, and thickness is 0.02mm, material is copper, and the material of described medium substrate 1 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 3 and medium substrate 1 upper surface Unanimously；Design shape and the size of described metal antenna paster 3 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 125 ° in the counterclockwise direction, with curvilinear equationIntersection point be H (15.901mm ,-5.572mm), make minute surface pair with straight line y=-x for axis of symmetry Claim to obtain a L (5.572mm ,-15.901mm), then along the direction that line segment one and x-axis angle are 55 °, prolong in coordinate axes the 4th interval Grow to original 3 times, be extended line segment two, prolongation line segment two is made minute surface symmetry with straight line y=-x for axis of symmetry and is prolonged Long line segment three, the intersection point extending line segment two and prolongation line segment three is Difference junction point H (15.901mm ,-5.572mm),And L (5.572mm ,-15.901mm),Obtain line segment HW and line segment LW, then Secondary initial point (0mm, 0mm) is carried out antenna patch shape design as starting point according to below equation:

Y=0 (0≤x≤2.5) (1)

$\begin{array}{ccc}y=\sqrt{-x^2+5x-4.6875}-1.25& (-1.25\≤y\≤0)& (2.5\≤x\≤3.75)\end{array}---\left(2\right)$

$\begin{array}{ccc}y=\sqrt{-x^2+10x-23.4375}-1.25& (-2.5\≤y\≤-1.25)& (3.75\≤x\≤6.25)\end{array}---\left(3\right)$

$\begin{array}{ccc}y=\sqrt{-x^2+15x-54.6875}-1.25& (-1.25\≤y\≤0)& (6.25\≤x\≤7.5)\end{array}---\left(4\right)$

$\begin{array}{ccc}y=\sqrt{-x^2+15x-50}-2.5& (-2.5\≤y\≤0)& (7.5\≤x\≤10)\end{array}---\left(5\right)$

$\begin{array}{ccc}y=\sqrt{-x^2+27.5x-175}-2.5& (-6.25\≤y\≤-5.572)& (10\≤x\≤15.901)\end{array}---\left(6\right)$

By being joined end to end successively by the whole curves obtained by formula, obtain 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 merging obtain rotating graphs one, by rotating graphs one with pointFor rotation Turning point, turns clockwise 20 ° and entirety is reduced into original 0.8 times, obtains rotating graphs two, by rotating graphs one with pointFor the point of rotation, turn clockwise 40 °, obtain rotating graphs three, will Rotating graphs one is with pointFor the point of rotation, turn clockwise 60 ° and whole Body is reduced into original 0.8 times, obtains rotating graphs four, by rotating graphs one with pointFor the point of rotation, turn clockwise 80 °, obtain rotating graphs five, will Rotating graphs one is with pointFor the point of rotation, turn clockwise 100 ° and whole Body is reduced into original 0.8 times, obtains rotating graphs six, by rotating graphs one with pointFor the point of rotation, turn clockwise 120 °, obtain rotating graphs seven, will Rotating graphs one is with pointFor the point of rotation, turn clockwise 140 ° also Entirety is reduced into original 0.8 times, obtains rotating graphs eight, by rotating graphs one with pointFor the point of rotation, turn clockwise 160 °, obtain rotating graphs nine, By rotating graphs one with pointFor the point of rotation, turn clockwise 180 ° also Entirety is reduced into original 0.8 times, obtains rotating graphs ten, by rotating graphs one with pointFor the point of rotation, turn clockwise 200 °, obtain rotating graphs ten One, by rotating graphs one with pointFor the point of rotation, turn clockwise 220 ° and overall be reduced into original 0.8 times, obtain rotating graphs 12, by rotating graphs one with pointFor the point of rotation, turn clockwise 240 °, obtain rotating graphs 13, By rotating graphs one with pointFor the point of rotation, turn clockwise 260 ° And entirety is reduced into original 0.8 times, obtain rotating graphs 14, by rotating graphs one with pointFor the point of rotation, turn clockwise 280 °, obtain rotating graphs ten Five, by rotating graphs one with pointFor the point of rotation, turn clockwise 300 ° and overall be reduced into original 0.8 times, obtain rotating graphs 16, by rotating graphs one with pointFor the point of rotation, turn clockwise 320 °, obtain rotating graphs ten Seven, by rotating graphs one with pointFor the point of rotation, turn clockwise 340 ° and overall be reduced into original 0.8 times, obtain rotating graphs 18, 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, rotating graphs 12, rotating graphs 13, rotating graphs 14, rotating graphs 15, rotating graphs 16, rotating graphs 17 and rotating graphs ten octadentate obtain closed figure, contracts the circular coverage rate radius of closed figure Little for the original 0.24377 times design shape obtaining required metal antenna paster 3 and size, cut out according to design shape and size Cut and obtain metal antenna paster 3；One end of described cylindrical metal conductor 4 is connected with metal antenna paster 3, and cylindrical metal is led The material of body 4 is copper, its bottom surface radius r=0.5mm, thickness d=2.54mm, cylindrical metal conductor 4 and metal antenna paster 3 The vertical dimension of the center of circle, junction and 1 four sides of medium substrate be respectively 16.5mm, 16.5mm, 13.5mm and 13.5mm, The aperture R=1.9mm of circular hole 5 on the earth plate 2 relative with cylindrical metal conductor 4, described cylindrical metal conductor 4 other end Output interface be connected with energy management circuit, this energy management circuit is for storing the energy absorbed.

Fig. 3 is the return loss plot of the electromagnetic wave energy collection system utilizing the simulation of HFSS antenna modeling simulation software, by Figure understands, and the return loss of this electromagnetic wave energy collection system is-37dB, also wants than the return loss of other same volume antenna Little, performance is the best.

Fig. 4 is the electromagnetic wave energy collection system input impedance figure utilizing the simulation of HFSS antenna modeling simulation software, by scheming Understanding, this electromagnetic wave energy collection system is 52.1 Ω at the input impedance of 2.48GHz, closely normal impedance 50 Ω.

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. electromagnetic wave energy collection system, it is characterised in that include consistent size and medium substrate bonded to each other and connect from top to bottom Floor, is wherein pasted with metal antenna paster on medium substrate, the middle part of medium substrate is provided with the circle extending vertically through medium substrate Cylindricality metallic conductor, earth plate is provided with the circular hole concentric with cylindrical metal conductor bottom surface；The circle of described metal antenna paster The radius of coverage rate is 0.1091 λ, wherein λ=121mm, and λ is the wavelength of 2.48GHz radio frequency, and thickness is 0.02mm, and material is Copper, the material of described medium substrate is Rogers RO6010, DIELECTRIC CONSTANT ε_r=10.2, thickness d=2.54mm, length and width Degree is 30mm, and the central point of metal antenna paster is consistent with the center position of medium substrate upper surface；Described metal antenna The design shape of paster and size meet following requirement, set up plane right-angle coordinate, by initial point (0mm ,-2.5mm) as rising 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 125 °, with curvilinear equationIntersection point be H (15.901mm ,-5.572mm), make minute surface pair with straight line y=-x for axis of symmetry Claim to obtain a L (5.572mm ,-15.901mm), then along the direction that line segment one and x-axis angle are 55 °, in coordinate axes the 4th is interval Extend to original 3 times, be extended line segment two, prolongation line segment two is made minute surface symmetry with straight line y=-x for axis of symmetry and is prolonged Long line segment three, the intersection point extending line segment two and prolongation line segment three is Difference junction point H (15.901mm ,-5.572mm),And L (5.572mm ,-15.901mm),Obtain line segment HW and line segment LW, Again initial point (0mm, 0mm) is carried out antenna patch shape design as starting point according to below equation:

Y=0 (0≤x≤2.5) (1)

$\begin{array}{ccc}y=\sqrt{-x^2+5x-4.6875}-1.25& (-1.25\≤y\≤0)& (2.5\≤x\≤3.75)\end{array}---\left(2\right)$

$\begin{array}{ccc}y=\sqrt{-x^2+10x-23.4375}-1.25& (-2.5\≤y\≤-1.25)& (3.75\≤x\≤6.25)\end{array}---\left(3\right)$

$\begin{array}{ccc}y=\sqrt{-x^2+15x-54.6875}-1.25& (-1.25\≤y\≤0)& (6.25\≤x\≤7.5)\end{array}---\left(4\right)$

$\begin{array}{ccc}y=\sqrt{-x^2+15x-50}-2.5& (-2.5\≤y\≤0)& (7.5\≤x\≤10)\end{array}---\left(5\right)$

$\begin{array}{ccc}y=\sqrt{-x^2+27.5x-175}-2.5& (-6.25\≤y\≤-5.572)& (10\≤x\≤15.901)\end{array}---\left(6\right)$

By being joined end to end successively by the whole curves obtained by formula, obtain initial graphics one, with straight line y=-x as axis of symmetry, Initial graphics one is carried out minute surface symmetrical, obtain 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 rotation Turning point, turns clockwise 20 ° and entirety is reduced into original 0.8 times, obtains rotating graphs two, by rotating graphs one with pointFor the point of rotation, turn clockwise 40 °, obtain rotating graphs three, will Rotating graphs one is with pointFor the point of rotation, turn clockwise 60 ° and whole Body is reduced into original 0.8 times, obtains rotating graphs four, by rotating graphs one with pointFor the point of rotation, turn clockwise 80 °, obtain rotating graphs five, will Rotating graphs one is with pointFor the point of rotation, turn clockwise 100 ° also Entirety is reduced into original 0.8 times, obtains rotating graphs six, by rotating graphs one with pointFor the point of rotation, turn clockwise 120 °, obtain rotating graphs seven, will Rotating graphs one is with pointFor the point of rotation, turn clockwise 140 ° also Entirety is reduced into original 0.8 times, obtains rotating graphs eight, by rotating graphs one with pointFor the point of rotation, turn clockwise 160 °, obtain rotating graphs nine, By rotating graphs one with pointFor the point of rotation, turn clockwise 180 ° And entirety is reduced into original 0.8 times, obtain rotating graphs ten, by rotating graphs one with pointFor the point of rotation, turn clockwise 200 °, obtain rotating graphs ten One, by rotating graphs one with pointFor the point of rotation, turn clockwise 220 ° and overall be reduced into original 0.8 times, obtain rotating graphs 12, by rotating graphs one with pointFor the point of rotation, turn clockwise 240 °, obtain rotating graphs 13, By rotating graphs one with pointFor the point of rotation, turn clockwise 260 ° And entirety is reduced into original 0.8 times, obtain rotating graphs 14, by rotating graphs one with pointFor the point of rotation, turn clockwise 280 °, obtain rotating graphs 15, By rotating graphs one with pointFor the point of rotation, turn clockwise 300 ° And entirety is reduced into original 0.8 times, obtain rotating graphs 16, by rotating graphs one with pointFor the point of rotation, turn clockwise 320 °, obtain rotating graphs ten Seven, by rotating graphs one with pointFor the point of rotation, turn clockwise 340 ° and overall be reduced into original 0.8 times, obtain rotating graphs 18, 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, rotating graphs 12, rotating graphs 13, rotating graphs 14, rotating graphs 15, rotating graphs 16, rotating graphs 17 and rotating graphs ten octadentate obtain closed figure, contracts the circular coverage rate radius of closed figure Little for the original 0.24377 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 16.5mm, 16.5mm, 13.5mm and 13.5mm, 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.