CN106299656A - 2.48GHz high-frequency signal collection device - Google Patents

Abstract

The invention discloses a kind of 2.48GHz high-frequency signal collection device, 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

2.48GHz high-frequency signal collection device

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 2.48GHz high-frequency signal collection device.

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 2.48GHz high-frequency signal reasonable in design receipts Acquisition means, this antenna is compared with the less size having for other antenna, the loss of relatively low clawback, good impedance matching Higher gain.

The present invention solves that above-mentioned technical problem adopts the following technical scheme that, 2.48GHz high-frequency signal collection device, it is special Levy and be to include consistent size and medium substrate bonded to each other and earth plate from top to bottom, be wherein pasted with gold on medium substrate Belong to antenna patch, the middle part of medium substrate is provided with the cylindrical metal conductor extending vertically through medium substrate, earth plate be provided with The circular hole that cylindrical metal conductor bottom surface is concentric；The radius of the circular coverage rate of described metal antenna paster is 0.11405 λ, Wherein λ=121mm, λ are the wavelength of 2.48GHz 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, metal antenna The central point of paster is consistent with the center position of medium substrate upper surface；The design shape of described metal antenna paster and size Meeting following requirement, set up plane right-angle coordinate, by initial point (0mm ,-2.5mm) as starting point, (13.75mm ,-2.5mm) is 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) 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), makees minute surface symmetry with straight line y=-x for axis of symmetry and obtains a L (5.572mm ,-15.901mm), Again along the direction that line segment one and x-axis angle are 55 °, in coordinate axes the 4th 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 extended line segment three, extend line segment two and extended line The intersection point of section three isDifference 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, the most successively rotate 20 °, 40 °, 60 °, 80 °, 100 °, 120 °, 140 °, 160 °, 180 °, 200 °, 220 °, 240 °, 260 °, 280 °, 300 °, 320 ° and 340 °, respectively obtain 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, rotation figure Shape 12, rotating graphs 13, rotating graphs 14, rotating graphs 15, rotating graphs 16, rotating graphs 17 and rotation Figure 18, rotating graphs one, rotating graphs two, rotating graphs three, rotating graphs four, rotating graphs five, rotating graphs six, rotation Turn figure 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 and To closed figure, it is that original 0.24377 times obtains required metal antenna patch by the circular coverage rate reduced radius of closed figure The design shape of sheet and size, obtain metal antenna paster according to design shape and size cutting；Described cylindrical metal conductor One end be connected with metal antenna paster, the material of cylindrical metal conductor is copper, its bottom surface radius r=0.5mm, thickness d= 2.54mm, cylindrical metal conductor divides with the vertical dimension of four sides in the center of circle, junction and medium substrate of metal antenna paster Not Wei 16.57mm, 16.57mm, 13.43mm and 13.43mm, the aperture of circular hole on the earth plate relative with cylindrical metal conductor R=1.9mm, the output interface of the described cylindrical metal conductor other end is connected with energy management circuit, this energy management circuit For the energy absorbed is stored.

The technique effect of the present invention is: 2.48GHz high-frequency signal collection device has lower return loss, good resistance Anti-coupling 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 2.48GHz high-frequency signal collection device structural representation；

Fig. 3 is the return loss of the 2.48GHz high-frequency signal collection device utilizing the simulation of HFSS antenna modeling simulation software Figure；

Fig. 4 is the 2.48GHz high-frequency signal collection device gain diagram 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 2.48GHz high-frequency signal collection device, and it is right to need when microstrip antenna designs The size of the metal antenna paster of 2.48GHz high-frequency signal collection device, the size of medium substrate, thickness carry out theoretic estimating Calculate, the 2.48GHz high-frequency signal of applicable characteristic frequency more quickly could be found simulation experiment when accurately to collect dress Put.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 Δ 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 1-2,2.48GHz high-frequency signal collection device, including consistent size from top to bottom and bonded to each other Medium substrate 1 and earth plate 2, be wherein pasted with metal antenna paster 3 on medium substrate 1, the middle part of medium substrate 1 is provided with vertically Running through the cylindrical metal conductor 4 of medium substrate 1, earth plate 2 is provided with the circular hole 5 concentric with cylindrical metal conductor 4 bottom surface； The radius of the circular coverage rate of described metal antenna paster 3 is 0.11405 λ, wherein λ=121mm, and λ is 2.48GHz radio frequency Wavelength, thickness is 0.02mm, and 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 30mm, the central point of metal antenna paster 3 and medium substrate 1 The center position of upper surface is consistent；The design shape of described metal antenna paster 3 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) be another end points along x-axis just The line segment one of an a length of 13.75mm is made in direction, with point (13.75mm ,-2.5mm) for the point of rotation, by line segment one along inverse Clockwise rotates 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 is the direction of 55 ° with x-axis angle, extends to original 3 times and be extended line segment two in coordinate axes the 4th interval, will Prolongation line segment 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 extended line The intersection point of section three isDifference 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, the most successively rotate 20 °, 40 °, 60 °, 80 °, 100 °, 120 °, 140 °, 160 °, 180 °, 200 °, 220 °, 240 °, 260 °, 280 °, 300 °, 320 ° and 340 °, respectively obtain 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, rotation figure Shape 12, rotating graphs 13, rotating graphs 14, rotating graphs 15, rotating graphs 16, rotating graphs 17 and rotation Figure 18, rotating graphs one, rotating graphs two, rotating graphs three, rotating graphs four, rotating graphs five, rotating graphs six, rotation Turn figure 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 and To closed figure, it is that original 0.24377 times obtains required metal antenna patch by the circular coverage rate reduced radius of closed figure The design shape of sheet 3 and size, obtain metal antenna paster 3 according to design shape and size cutting；Described cylindrical metal is led One end of body 4 is connected with metal antenna paster 3, and the material of cylindrical metal conductor 4 is copper, its bottom surface radius r=0.5mm, thick Degree d=2.54mm, cylindrical metal conductor 4 and the center of circle, junction of metal antenna paster 3 and hanging down of 1 four sides of medium substrate Straight distance respectively 16.57mm, 16.57mm, 13.43mm and 13.43mm, on the earth plate 2 relative with cylindrical metal conductor 4 The aperture R=1.9mm of circular hole 5, the output interface of described cylindrical metal conductor 4 other end is connected with energy management circuit, should Energy management circuit is for storing the energy absorbed.

Fig. 3 is the return loss of the 2.48GHz high-frequency signal collection device utilizing the simulation of HFSS antenna modeling simulation software Figure, as seen from the figure, the return loss of this 2.48GHz high-frequency signal collection device is-47dB, returning than other same volume antenna Ripple loss is also little, and performance is the best.

Fig. 4 is the 2.48GHz high-frequency signal collection device gain diagram utilizing the simulation of HFSS antenna modeling simulation software, by scheming Understanding, this 2.48GHz high-frequency signal collection device is 4.2dB in the gain of 2.48GHz, and directivity is the most 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)

1.2.48GHz high-frequency signal collection device, it is characterised in that include consistent size and bonded to each other from top to bottom Medium substrate and earth plate, be wherein pasted with metal antenna paster on medium substrate, the middle part of medium substrate is provided with vertical Directly running through the cylindrical metal conductor of medium substrate, earth plate is provided with the circle concentric with cylindrical metal conductor bottom surface Hole；The radius of the circular coverage rate of described metal antenna paster is 0.11405 λ, wherein λ=121mm, and λ is 2.48GHz The wavelength of 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 30mm, the central point of metal antenna paster and medium The center position of upper surface of base plate is consistent；Design shape and the size of described metal antenna paster meet following requirement, Setting up plane right-angle coordinate, by initial point (0mm ,-2.5mm) as starting point, (13.75mm ,-2.5mm) is another end points The line segment one of an a length of 13.75mm is made, with point (13.75mm ,-2.5mm) for the point of rotation, by line along x-axis positive direction Section one rotates 125 ° in the counterclockwise direction, with curvilinear equationIntersection point be H (15.901mm ,-5.572mm), with straight line y=-x for axis of symmetry make minute surface symmetry 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 interval, original 3 are extended to It is extended line segment two again, prolongation line segment two is made minute surface symmetry with straight line y=-x for axis of symmetry and is extended line segment Three, the intersection point extending line segment two and prolongation line segment three isConnect respectively Contact H (15.901mm ,-5.572mm),With L (5.572mm ,- 15.901mm)、Obtain line segment HW and line segment LW, again by initial point (0mm, 0mm) carries 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, the most successively rotate 20 °, 40 °, 60 °, 80 °, 100 °, 120 °, 140 °, 160 °, 180 °, 200 °, 220 °, 240 °, 260 °, 280 °, 300 °, 320 ° and 340 °, respectively obtain 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, rotation figure Shape 12, rotating graphs 13, rotating graphs 14, rotating graphs 15, rotating graphs 16, rotating graphs 17 and rotation Figure 18, rotating graphs one, rotating graphs two, rotating graphs three, rotating graphs four, rotating graphs five, rotating graphs six, rotation Turn figure 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 and To closed figure, it is that original 0.24377 times obtains required metal antenna patch by the circular coverage rate reduced radius of closed figure The design shape of sheet and size, obtain metal antenna paster according to design shape and size cutting；Described cylindrical metal conductor One end be connected with metal antenna paster, the material of cylindrical metal conductor is copper, its bottom surface radius r=0.5mm, thickness d= 2.54mm, cylindrical metal conductor divides with the vertical dimension of four sides in the center of circle, junction and medium substrate of metal antenna paster Not Wei 16.57mm, 16.57mm, 13.43mm and 13.43mm, the aperture of circular hole on the earth plate relative with cylindrical metal conductor R=1.9mm, the output interface of the described cylindrical metal conductor other end is connected with energy management circuit, this energy management circuit For the energy absorbed is stored.