CN106410384A - High-gain electromagnetic energy collecting device with five unequal angles - Google Patents

Abstract

The invention discloses a high-gain electromagnetic energy collecting device with five unequal angles. The high-gain electromagnetic energy collecting device comprises a dielectric covering layer, a dielectric substrate and an earth plate which are consistent in size and laminated together from top to bottom, wherein a metal antenna patch is attached to one side, which is laminated together with the dielectric covering layer, of the dielectric substrate; the middle part of the dielectric substrate is provided with a cylindrical metal conductor which vertically passes through the dielectric substrate and four cylindrical holes; and the earth plate is provided with a circular hole which is concentric with a bottom surface of the cylindrical metal conductor. The high-gain electromagnetic energy collecting device has lower return loss, good impedance matching, a better standing-wave ratio and a relatively high gain, so that radio frequency energy in an environment can be received efficiently.

Description

Five jiaos of high-gain does not wait electromagnetic energy collection device

Technical field

The invention belongs to electromagnetic energy reception antenna technical field is and in particular to one kind is used for receiving RF energy in environment Five jiaos of high-gain wait electromagnetic energy collection device.

Background technology

In intelligent building, the sensor node that each building is at least up to a hundred is distributed in each portion in building body Position, for parameters such as monitoring temperature, brightness, flows of the people；There is provided power supply by wiring for these sensor nodes, its cost is ten Point expensive, and be how to judge that the battery of which node has exhausted and carried out using battery main problems faced of powering backward Change, this is commercially difficult to accept, and being aided with rechargeable battery using ambient radio-frequency energy collection technique is then that it compares Preferably power supply mode.

Content of the invention

Present invention solves the technical problem that there is provided a kind of five jiaos of structure high-gain simple and reasonable in design electricity such as not Magnetic energy collection device, the less size having for the more other antenna of this antenna, relatively low clawback loss, good Impedance matching and higher gain.

The present invention is to solve above-mentioned technical problem to adopt the following technical scheme that, five jiaos of high-gain does not wait electromagnetic energy to collect dress Put it is characterised in that including consistent size and dielectric passivation bonded to each other, medium substrate and earth plate from top to bottom, wherein Fit with dielectric passivation side medium substrate on be pasted with metal antenna 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, earth plate is provided with concentric with cylindrical metal conductor bottom surface Circular hole；The material of described dielectric passivation is Rogers RO6002, permittivity ε_r=2.94, thickness d=0.51mm is long Degree and width are 30mm；The radius of the circular coverage rate of described metal antenna paster is 0.10098 λ, wherein λ=122mm, λ For the wavelength of 2.45GHz radio frequency, thickness is 0.02mm, and material is copper, and the material of described medium substrate is RogersRO6010, is situated between Electric constant ε_r=10.2, thickness d=2.54mm, length and width is 30mm, the central point of metal antenna paster and medium base The center position of plate upper surface is consistent；The design shape of described metal antenna paster and size meet following requirement, set up flat Face rectangular coordinate system, by initial point (0mm, -2.5mm) as starting point, (13.75mm, -2.5mm) is another end points along x-axis positive direction Make the line segment one of an a length of 13.75mm, with point (13.75mm, -2.5mm) for the point of rotation, line segment one is revolved in the counterclockwise direction Turn 99 °, with curvilinear equationIntersection point be H (14.3366mm, -6.20383mm), with straight line y=-x Make minute surface for symmetry axis and symmetrically obtain point L (6.20383mm, -14.3366mm), line segment one is made mirror with straight line y=-x for symmetry axis Face symmetrically obtains line segment two, and the intersection point of line segment one and line segment two isPoint Other tie point H (14.3366mm, -6.20383mm),And L (6.20383mm, -14.3366mm),Obtain line segment HW and line segment Initial point (0mm, 0mm) is carried out antenna patch shape design as starting point according to below equation by LW again：

Y=0 (0≤x≤2.5) (1)

To be joined end to end successively by the whole curves obtained by formula, obtain initial graphics one, be symmetrical with straight line y=-x Axle, initial graphics one is carried out minute surface symmetrically, obtains initial graphics two, by line segment HW, line segment LW, initial graphics one and initial graph Shape two merges, and obtains rotating graphs one, by rotating graphs one with point For the point of rotation, turn clockwise 72 ° and overall be reduced into original 0.8 times, obtain 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, turn clockwise 216 °, Obtain rotating graphs four, by rotating graphs one with pointFor the point of rotation, Turn clockwise 288 ° and overall be reduced into original 0.8 times, obtain rotating graphs five, rotating graphs one, rotating graphs two, rotation Turn figure three, rotating graphs four and rotating graphs five merging, obtain closed figure, circular by closed figure covers radius surface contracting Little for the original 0.776454 times design shape obtaining required metal antenna paster and size, according to this design shape and size Cutting obtains metal antenna paster；On described medium substrate, the radius of four cylindrical cavities is 0.5mm, four cylindrical holes The circle center line connecting in hole constitutes the square that the length of side is 22mm, the vertical range of the following and upper and lower side of medium substrate on this square It is respectively 2.9mm and 5.1mm, square left and right side is respectively 2mm and 6mm with the vertical range of the medium substrate left and right sides； One end of described cylindrical metal conductor is connected with metal antenna paster, and the material of cylindrical metal conductor is copper, its bottom surface half The junction center of circle of footpath r=0.5mm, thickness d=2.54mm, cylindrical metal conductor and metal antenna paster and medium substrate four The vertical range of bar side is respectively 16.57mm, 16.57mm, 13.43mm and 13.43mm, 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 used for being stored the energy absorbing.

The technique effect of the present invention is：Five jiaos of high-gain wait electromagnetic energy collection device have lower return loss, Good impedance matching and standing wave and higher gain are such that it is able to RF energy in efficient reception environment.

Brief description

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

Fig. 2 is that five jiaos of high-gain does not wait electromagnetic energy collection device structural representation；

Fig. 3 is not wait returning of electromagnetic energy collection device using five jiaos of the high-gain of HFSS antenna modeling simulation software simulation Ripple loss figure；

Fig. 4 is not wait the input of electromagnetic energy collection device using five jiaos of the high-gain of HFSS antenna modeling simulation software simulation Impedance diagram.

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

Specific embodiment

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, specific description.

The core of this invention is that five jiaos of high-gain does not wait the design of electromagnetic energy collection device, in microstrip antenna designs Need five jiaos of high-gain is not waited with the size of the metal antenna paster of electromagnetic energy collection device, the size of medium substrate, thickness Carry out theoretic estimation, more quickly could accurately find the high-gain five of suitable CF when simulated experiment Electromagnetic energy collection device is not waited at angle.So below, explanation each data parameters of microstrip antenna. taking rectangular microstrip antenna as a example Theoretical calculation method.

Patch size L × W, patch width W is：

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

The relative efficiency permittivity ε of microstrip antenna medium substrate_reFor：

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

Wherein f_uHighest frequency for the work of microstrip antenna.

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

Then length L of microstrip antenna paster is：

Size L of earth plate_g×W_gMeet following theoretical formula

L_g≥L+6h (6)

W_g≥W+6h (7)

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

As shown in Figure 1-2, five jiaos of high-gain does not wait electromagnetic energy collection device, including consistent size from top to bottom and mutually The dielectric passivation 1 of laminating, medium substrate 2 and earth plate 3, the medium substrate 2 of side of wherein being fitted 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 and four Cylindrical cavity 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 Expect for Rogers RO6002, permittivity ε_r=2.94, thickness d=0.51mm, length and width is 30mm；Described metal The radius of the circular coverage rate of antenna patch 4 is 0.10098 λ, and wherein λ=122mm, λ are the wavelength of 2.45GHz radio frequency, thickness For 0.02mm, material is copper, and the material of described medium substrate 2 is Rogers RO6010, permittivity ε_r=10.2, thickness d= 2.54mm, length and width is 30mm, the center position of the central point of metal antenna paster 4 and medium substrate 2 upper surface Unanimously；The design shape of described metal antenna paster 4 and size meet following requirement, set up plane right-angle coordinate, by initial point (0mm, -2.5mm), as starting point, (13.75mm, -2.5mm) makes an a length of 13.75mm for another end points along x-axis positive direction Line segment one, with point (13.75mm, -2.5mm) be the point of rotation, line segment one is rotated 99 ° in the counterclockwise direction, with curvilinear equationIntersection point be H (14.3366mm, -6.20383mm), mirror is made for symmetry axis with straight line y=-x Face symmetrically obtains point L (6.20383mm, -14.3366mm), line segment one is made minute surface with straight line y=-x for symmetry axis and symmetrically obtains Line segment two, the intersection point of line segment one and line segment two isConnect respectively Point H (14.3366mm, -6.20383mm),And L (6.20383mm, -14.3366mm),Obtain line segment HW and line segment Initial point (0mm, 0mm) is carried out antenna patch shape design as starting point according to below equation by LW again：

Y=0 (0≤x≤2.5) (1)

To be joined end to end successively by the whole curves obtained by formula, obtain initial graphics one, be symmetrical with straight line y=-x Axle, initial graphics one is carried out minute surface symmetrically, obtains initial graphics two, by line segment HW, line segment LW, initial graphics one and initial graph Shape two merges, and obtains rotating graphs one, by rotating graphs one with pointFor The point of rotation, turn clockwise 72 ° and overall be reduced into original 0.8 times, obtain rotating graphs two, by rotating graphs one with pointFor the point of rotation, turn clockwise 144 °, obtain rotating graphs three, will revolve Turn figure one with pointFor the point of rotation, turn clockwise 216 °, revolved Turn figure four, by rotating graphs one with pointFor the point of rotation, dextrorotation Turn 288 ° and entirety is reduced into original 0.8 times, obtain rotating graphs five, rotating graphs one, rotating graphs two, rotating graphs 3rd, rotating graphs four and rotating graphs five merge, and obtain closed figure, and the circular coverage rate reduced radius of closed figure are former The 0.776454 times of design shape obtaining required metal antenna paster 4 coming and size, according to this design shape and size cutting Obtain metal antenna paster 4；On described medium substrate 2, the radius of four cylindrical cavities 6 is 0.5mm, four cylindrical holes The circle center line connecting in hole 6 constitutes the square that the length of side is 22mm, on this square following with medium substrate about 2 side vertical away from From respectively 2.9mm and 5.1mm, the vertical range of square left and right side and medium substrate 2 left and right sides be respectively 2mm and 6mm；One end of described cylindrical metal conductor 5 is connected with metal antenna paster 4, and the material of cylindrical metal conductor 5 is copper, its Bottom surface radius r=0.5mm, thickness d=2.54mm, the junction center of circle of cylindrical metal conductor 5 and metal antenna paster 4 and Jie The vertical range of 2 four sides of matter substrate is respectively 16.57mm, 16.57mm, 13.43mm and 13.43mm, with cylindrical metal The aperture R=1.9mm of circular hole 7 on the relative earth plate of conductor 53, the output interface of described cylindrical metal conductor 5 other end with Energy management circuit is connected, and this energy management circuit is used for being stored the energy absorbing.

Fig. 3 is not wait returning of electromagnetic energy collection device using five jiaos of the high-gain of HFSS antenna modeling simulation software simulation Ripple loss figure, as seen from the figure, it is -42.3dB that five jiaos of this high-gain does not wait the return loss of electromagnetic energy collection device, than other The return loss of same volume antenna is also little, and performance is very good.

Fig. 4 is not wait the input of electromagnetic energy collection device using five jiaos of the high-gain of HFSS antenna modeling simulation software simulation Impedance diagram, as seen from the figure, it is 50.8 Ω in the input impedance of 2.45GHz that five jiaos of this high-gain does not wait electromagnetic energy collection device, Closely normal impedance 50 Ω.

Embodiment above describes general principle, principal character and the advantage of the present invention, the technical staff of the industry should Understand, the present invention is not restricted to the described embodiments, the simply explanation present invention's described in above-described embodiment and specification 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. five jiaos of high-gain does not wait electromagnetic energy collection device it is characterised in that including consistent size and bonded to each other from top to bottom Dielectric passivation, medium substrate and earth plate, the medium substrate of side of wherein fitting with dielectric passivation is pasted with metal Antenna patch, the middle part of medium substrate is provided with the cylindrical metal conductor extending vertically through medium substrate 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, permittivity ε_r=2.94, thickness d=0.51mm, length and width is 30mm；The circle of described metal antenna paster The radius of shape coverage rate is 0.10098 λ, and wherein λ=122mm, λ are the wavelength of 2.45GHz radio frequency, and thickness is 0.02mm, material For copper, the material of described medium substrate is Rogers RO6010, permittivity ε_r=10.2, thickness d=2.54mm, length and Width is 30mm, and the central point of metal antenna paster is consistent with the center position of medium substrate upper surface；Described metal sky The design shape of line paster and size meet following requirement, set up plane right-angle coordinate, by initial point (0mm, -2.5mm) conduct 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, line segment one is rotated 99 ° in the counterclockwise direction, with curvilinear equationIntersection point be H (14.3366mm, -6.20383mm), mirror is made for symmetry axis with straight line y=-x Face symmetrically obtains point L (6.20383mm, -14.3366mm), line segment one is made minute surface with straight line y=-x for symmetry axis and symmetrically obtains Line segment two, the intersection point of line segment one and line segment two isConnect respectively Point H (14.3366mm, -6.20383mm),And L (6.20383mm, -14.3366mm),Obtain line segment HW and line segment Initial point (0mm, 0mm) is carried out antenna patch shape design as starting point according to below equation by LW again：

Y=0 (0≤x≤2.5) (1)

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

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

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

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

$\begin{array}{ccc}y=\sqrt{-x^2+27.5x-175}-2.5& (-6.25\≤y\≤-6.20383)& (10\≤x\≤14.3366)\end{array}---\left(6\right)$

To be joined end to end successively by the whole curves obtained by formula, obtain initial graphics one, with straight line y=-x as symmetry axis, Initial graphics one are carried out minute surface symmetrically, obtains initial graphics two, by line segment HW, line segment LW, initial graphics one and initial graphics Two merging, obtain rotating graphs one, by rotating graphs one with point For the point of rotation, turn clockwise 72 ° and overall be reduced into original 0.8 times, obtain 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, turn clockwise 216 °, obtain rotating graphs four, by rotating graphs one with pointFor The point of rotation, turn clockwise 288 ° and overall be reduced into original 0.8 times, obtain rotating graphs five, rotating graphs one, rotation figure Shape two, rotating graphs three, rotating graphs four and rotating graphs five merge, and obtain closed figure, by the circle covering of closed figure Radius surface is reduced into design shape and the size that original 0.776454 times obtains required metal antenna paster, according to this design shape Shape and size cutting obtain metal antenna paster；On described medium substrate, the radius of four cylindrical cavities is 0.5mm, four The circle center line connecting of cylindrical cavity constitutes the square that the length of side is 22mm, following and the upper and lower side of medium substrate on this square Vertical range is respectively 2.9mm and 5.1mm, and square left and right side is respectively with the vertical range of the medium substrate left and right sides 2mm and 6mm；One end of described cylindrical metal conductor is connected with metal antenna paster, and the material of cylindrical metal conductor is copper, The junction center of circle of its bottom surface radius r=0.5mm, thickness d=2.54mm, cylindrical metal conductor and metal antenna paster and Jie The vertical range of four sides of matter substrate is respectively 16.57mm, 16.57mm, 13.43mm and 13.43mm, leads with cylindrical metal The aperture R=1.9mm of circular hole on the earth plate of body phase pair, the output interface of the described cylindrical metal conductor other end and energy pipe Reason circuit is connected, and this energy management circuit is used for being stored the energy absorbing.