CN106229665A - High frequency power absorption-type microstrip antenna - Google Patents

Abstract

The invention discloses a kind of high frequency power absorption-type 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

High frequency power absorption-type 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 High frequency power absorption-type 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, magnetic coupling resonance 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.Send out Existing 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 high frequency power absorption-type reasonable in design is micro- Band antenna, 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, high frequency power absorption-type microstrip antenna, it is special Levy and be to include consistent size and dielectric passivation bonded to each other, medium substrate and earth plate from top to bottom, wherein with medium Being pasted with metal antenna paster on the medium substrate of cover layer laminating side, the middle part of medium substrate is provided with and extends vertically through medium base The cylindrical metal conductor of plate, earth plate is provided with the circular hole concentric with cylindrical metal conductor bottom surface；Described dielectric passivation Material be Rogers RO6002, DIELECTRIC CONSTANT ε_r=2.94, thickness d=0.51mm, length and width is 30mm；Described The radius of the circular coverage rate of metal antenna paster is 0.114754 λ, wherein λ=122mm, and λ is the wavelength of 2.45GHz radio frequency, Thickness is 0.02mm, and material is copper, and the material of described medium substrate is Rogers RO6010, DIELECTRIC CONSTANT ε_r=10.2, thickness D=2.54mm, length and width is the center position of 30mm, the central point of metal antenna paster and medium substrate upper surface Unanimously；Design shape and the size of described metal antenna paster meet following requirement, set up plane right-angle coordinate, by initial point (0mm, 0mm), as starting point, makes the line segment one of an a length of 18mm along x-axis positive direction, by line segment one with point (18mm, 0mm) Rotate 114 ° as the point of rotation counterclockwise and obtain line segment two, by line segment two with straight lineMinute surface is made symmetrical for axis of symmetry Obtaining line segment three, the intersection point of line segment two and line segment three isThis point is at straight lineOn, again by initial point (0mm, 0mm) as starting point, make the line segment of an a length of 2.5mm along x-axis positive direction, with B (2.5mm ,-1.25mm) is the center of circle of 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 End point, with E₁(6.25mm ,-1.25mm) is another end points, radius r₄=0.625mm, making angle of circumference is 180 °, and direction is The circular arc protruded along y-axis negative direction, with the center of circle that F (7.5mm ,-1.25mm) is the 5th curve, with E₁(6.25mm ,- 1.25mm) it is end point, with F₁(7.5mm, 0mm) is another end points, radius r₅=1.25mm, making angle of circumference is 90 °, direction For the circular arc protruded to x-axis negative direction and y-axis positive direction, with the center of circle that G (7.5mm ,-2.5mm) is the 6th curve, with F₁ (7.5mm, 0mm) is end point, with G₁(10mm ,-2.5mm) is another end points, radius r₆=2.5mm, making angle of circumference is 90 °, Direction is the circular arc protruded to x-axis and y-axis positive direction, with the center of circle that H (11.875mm ,-2.5mm) is the 7th curve, with G₁ (10mm ,-2.5mm) is end point, with H₁(13.75mm ,-2.5mm) is another end points, radius r₇=1.875mm, makes circumference Angle is 180 °, and direction is the circular arc protruded to y-axis negative direction, with the center of circle that I (16.25mm ,-2.5mm) is the 8th curve, with H₁(13.75mm ,-2.5mm) is end point, with I₁(16.25mm, 0mm) is another end points, radius r₈=2.5mm, makes circumference Angle is 90 °, and direction is the circular arc protruded to x-axis negative direction and y-axis positive direction, with I₁(16.25mm, 0mm) is end point, b (18mm, 0mm) is another end points, makees the line segment of an a length of 1.75mm, obtains initial graphics one in x-axis and y-axis plane, will Initial graphics one is with straight lineMake minute surface symmetry for axis of symmetry and obtain initial graphics two, initial graphics one, initial graphics two, Line segment two and line segment three merging obtain rotating graphs one, by rotating graphs one with point For the point of rotation, turn clockwise 72 ° and be reduced into original 0.8 times and obtain rotating graphs two, by rotating graphs one with pointFor the point of rotation, turn clockwise 144 °, obtain rotating graphs three, will rotate Figure one is with pointFor the point of rotation, turn clockwise 216 °, obtain rotation figure Shape four, by rotating graphs one with pointFor the point of rotation, turn clockwise 288 ° And be reduced into original 0.8 times and obtain rotating graphs five, rotating graphs one, rotating graphs two, rotating graphs three, rotating graphs four Merge with rotating graphs five and obtain closed figure, by the reduced radius of the circular coverage rate of closed figure to original 0.43622 Obtain design shape and the size of required metal antenna paster again, obtain metal antenna patch according to design shape and size cutting Sheet；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 The center of circle, junction of radius r=0.5mm, thickness d=2.54mm, cylindrical metal conductor and metal antenna paster and medium substrate Article four, the vertical dimension of side is respectively 16.59mm, 16.59mm, 13.41mm and 13.41mm, relative with cylindrical metal conductor Earth plate on the aperture R=1.9mm of circular hole, the output interface of the described cylindrical metal conductor other end and energy management circuit Being connected, this energy management circuit is for storing the energy absorbed.

The technique effect of the present invention is: high frequency power absorption-type microstrip antenna 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 high frequency power absorption-type microstrip antenna structure schematic diagram；

Fig. 3 is the return loss of the high frequency power absorption-type microstrip antenna utilizing the simulation of HFSS antenna modeling simulation software Figure；

Fig. 4 is the gain diagram of the high frequency power absorption-type microstrip antenna utilizing the simulation of HFSS antenna modeling simulation software.

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 high frequency power absorption-type microstrip antenna designs, needs height when microstrip antenna designs Frequently the size of the metal antenna paster of power absorption type microstrip antenna, the size of medium substrate, thickness carries out theoretic estimation, The high frequency power absorption-type microstrip antenna of applicable characteristic frequency more quickly could be found accurately simulation experiment when.Institute By following 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, high frequency power absorption-type microstrip antenna, including consistent size from top to bottom and Jie bonded to each other Matter cover layer 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 patch 1, the middle part of medium substrate 2 is provided with the cylindrical metal conductor 5 extending vertically through medium substrate 2, and earth plate 3 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, and dielectric is normal Number ε_r=2.94, thickness d=0.51mm, length and width is 30mm；The half of the circular coverage rate of described metal antenna paster 4 Footpath is 0.114754 λ, wherein λ=122mm, and λ is the wavelength of 2.45GHz radio frequency, and thickness is 0.02mm, and material is copper, is given an account of The material of matter substrate 2 is Rogers RO6010, DIELECTRIC CONSTANT ε_r=10.2, thickness d=2.54mm, length and width is 30mm, the central point of metal antenna paster 4 is consistent with the center position of medium substrate 2 upper surface；Described metal antenna paster 4 Design shape and size meet following requirement, set up plane right-angle coordinate, by initial point (0mm, 0mm) as starting point, along x-axis Positive direction makes the line segment one of an a length of 18mm, and as the point of rotation, line segment one is rotated 114 ° with point (18mm, 0mm) counterclockwise 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 segment three Intersection point beThis 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 plane Making minute surface symmetry for axis of symmetry and obtain initial graphics two, initial graphics one, initial graphics two, line segment two and line segment three merging obtain Rotating graphs one, by rotating graphs one with pointFor the point of rotation, turn clockwise 72 ° and contract Little obtain rotating graphs two for original 0.8 times, by rotating graphs one with pointFor rotating Point, turns clockwise 144 °, obtains rotating graphs three, by rotating graphs one with pointFor rotation Turning point, turns clockwise 216 °, obtains rotating graphs four, by rotating graphs one with point For the point of rotation, turn clockwise 288 ° and be reduced into original 0.8 times and obtain rotating graphs five, rotating graphs one, rotating graphs Two, rotating graphs three, rotating graphs four and rotating graphs five merging obtain closed figure, by the circular coverage rate of closed figure Reduced radius to the original 0.43622 times design shape obtaining required metal antenna paster 4 and size, according to design shape and Size cutting obtains metal antenna paster 4；One end of described cylindrical metal conductor 5 is connected with metal antenna paster 4, cylindrical The material of metallic conductor 5 is copper, its bottom surface radius r=0.5mm, thickness d=2.54mm, cylindrical metal conductor 5 and metal sky The center of circle, junction of line paster 4 is respectively 16.59mm, 16.59mm, 13.41mm with the vertical dimension of 2 four sides of medium substrate And 13.41mm, the aperture R=1.9mm of circular hole 6, described cylindrical metal on the earth plate 3 relative with cylindrical metal conductor 5 The output interface of conductor 5 other end is connected with energy management circuit, and this energy management circuit is for carrying out the energy absorbed Store.

Fig. 3 is the return loss of the high frequency power absorption-type microstrip antenna utilizing the simulation of HFSS antenna modeling simulation software Figure, as seen from the figure, the return loss of this high frequency power absorption-type microstrip antenna is-23.6dB, than other same volume antenna Return loss is also little, and performance is the best.

Fig. 4 is that the high frequency power absorption-type microstrip antenna utilizing the simulation of HFSS antenna modeling simulation software is on XZ direction Gain diagram, as seen from the figure, this high frequency power absorption-type microstrip antenna is 3.64dB in the maximum gain of 2.45GHz, and directivity is non- Normal stablizes.

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. high frequency power absorption-type microstrip antenna, it is characterised in that include that consistent size and medium bonded to each other cover from top to bottom Cap rock, medium substrate and earth plate, be wherein 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 leads with cylindrical metal The circular hole that body 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 0.114754 λ, wherein λ =122mm, λ are the wavelength of 2.45GHz radio frequency, and thickness is 0.02mm, and material is copper, and the material of described medium substrate is Rogers RO6010, DIELECTRIC CONSTANT ε_r=10.2, thickness d=2.54mm, length and width is 30mm, 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 Ask, set up plane right-angle coordinate, by initial point (0mm, 0mm) as starting point, make the line of an a length of 18mm along x-axis positive direction Duan Yi, 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 is This point is at straight lineOn, again by initial point (0mm, 0mm) as starting point, along x-axis positive direction make one a length of The line segment of 2.5mm, 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, making angle of circumference is 90 °, and direction to x-axis and y-axis is just The circular arc that direction is protruded, 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 °, direction For the circular arc protruded along y-axis negative direction, 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, makes circle Round angle is 180 °, and direction is the circular arc protruded along y-axis positive direction, with the circle that E (5.625mm ,-1.25mm) is the 4th curve The heart, with D₁(5mm ,-1.25mm) is end point, with E₁(6.25mm ,-1.25mm) is another end points, radius r₄=0.625mm, makees Going out angle of circumference is 180 °, and direction is the circular arc protruded along y-axis negative direction, with the circle that F (7.5mm ,-1.25mm) is the 5th curve The heart, with E₁(6.25mm ,-1.25mm) is end point, with F₁(7.5mm, 0mm) is another end points, radius r₅=1.25mm, makes Angle of circumference is 90 °, and direction is the circular arc protruded to x-axis negative direction and y-axis positive direction, is the 6th with G (7.5mm ,-2.5mm) The center of circle of curve, with F₁(7.5mm, 0mm) is end point, with G₁(10mm ,-2.5mm) is another end points, radius r₆=2.5mm, Making angle of circumference is 90 °, and direction is the circular arc protruded to x-axis and y-axis positive direction, is the 7th with H (11.875mm ,-2.5mm) The center of circle of curve, with G₁(10mm ,-2.5mm) is end point, with H₁(13.75mm ,-2.5mm) is another end points, radius r₇= 1.875mm, making angle of circumference is 180 °, and direction is the circular arc protruded to y-axis negative direction, is the with I (16.25mm ,-2.5mm) The center of circle of eight curves, 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 the circular arc protruded to x-axis negative direction and y-axis positive direction, with I₁(16.25mm, 0mm) being end point, b (18mm, 0mm) is another end points, makees the line segment of an a length of 1.75mm, in x-axis and y-axis plane To initial graphics one, by initial graphics one with straight lineMake minute surface symmetry for axis of symmetry and obtain initial graphics two, initially Figure one, initial graphics two, line segment two and line segment three merging obtain rotating graphs one, by rotating graphs one with pointFor the point of rotation, turn clockwise 72 ° and be reduced into original 0.8 times and 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, suitable Hour hands rotate 216 °, obtain rotating graphs four, by rotating graphs one with point For the point of rotation, turn clockwise 288 ° and be reduced into original 0.8 times and obtain rotating graphs five, rotating graphs one, rotating graphs Two, rotating graphs three, rotating graphs four and rotating graphs five merging obtain closed figure, by the circular coverage rate of closed figure Reduced radius to the original 0.43622 times design shape obtaining required metal antenna paster and size, according to design shape and Size cutting obtains metal antenna paster；One end of described cylindrical metal conductor is connected with metal antenna paster, cylindrical gold The material belonging to conductor is copper, its bottom surface radius r=0.5mm, thickness d=2.54mm, and cylindrical metal conductor pastes with metal antenna The vertical dimension of the center of circle, junction of sheet and four sides of medium substrate be respectively 16.59mm, 16.59mm, 13.41mm and 13.41mm, the aperture R=1.9mm of circular hole on the earth plate relative with cylindrical metal conductor, described cylindrical metal conductor is another The output interface of one end is connected with energy management circuit, and this energy management circuit is for storing the energy absorbed.