CN106410389A - Electromagnetic energy collecting antenna capable of restraining loss - Google Patents

Abstract

The invention discloses an electromagnetic energy collecting antenna capable of restraining loss. The electromagnetic energy collecting antenna comprises a dielectric covering layer, a dielectric substrate and an earth plate which are consistent in sizes and laminated together from top to bottom, wherein a metal antenna patch, a director and a reflector are attached to one side, which is laminated together with the dielectric covering layer, of the dielectric substrate; a 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 electromagnetic energy collecting antenna has lower return loss, good impedance matching, a high standing-wave ratio and a relatively high gain, so that radio frequency energy in an environment can be received efficiently.

Description

Suppression loss electromagnetic energy gathers antenna

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 Suppression loss electromagnetic energy collection antenna.

Background technology

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

Content of the invention

Present invention solves the technical problem that there is provided a kind of structure suppression loss electromagnetic energy simple and reasonable in design adopting Collection antenna, the less size having for the more other antenna of this antenna, the loss of relatively low clawback, good impedance matching Higher gain.

The present invention is to solve above-mentioned technical problem to adopt the following technical scheme that, suppression loss electromagnetic energy gathers antenna, and it is special Levy and be including consistent size from top to bottom and dielectric passivation bonded to each other, medium substrate and earth plate, wherein with medium It is pasted with metal antenna paster, reflector and director, the middle part of medium substrate sets on the medium substrate of cover layer laminating side There are the cylindrical metal conductor extending vertically through medium substrate and four cylindrical cavities, earth plate is provided with is led with cylindrical metal The concentric circular hole in body 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 radius of the circular coverage rate of described metal antenna paster is 0.0967 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, permittivity 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 following wanting Ask, set up plane right-angle coordinate, by (0mm, -2.5mm) as starting point, (13.75mm, -2.5mm) is another end points along 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 along the inverse time Pin direction rotates 112.5 °, with curvilinear equationIntersection point be H (15.185mm ,- 5.965mm), minute surface is made for symmetry axis with straight line y=-x and symmetrically obtains point L (5.965mm, -15.185mm), then along line segment one with X-axis angle is 67.5 ° of direction, extends to original 2 times and is extended line segment two, by extended line in reference axis the 4th interval Section two is made minute surface with straight line y=-x for symmetry axis and is symmetrically extended line segment three, the intersection point extending line segment two and extending line segment three ForDifference tie point H (15.185mm, -5.965mm),With L (5.965mm, -15.185mm), Obtain line segment HW and line segment LW, again by initial point (0mm, 0mm) as starting point, antenna patch shape is carried out according to below equation and sets Meter：

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, line segment HW, line segment LW, initial graphics one and initial graphics Two merging obtain rotating graphs one, by rotating graphs one with pointFor The point of rotation, rotates 45 °, 90 °, 135,180 °, 225 °, 270 ° and 315 ° clockwise successively, respectively obtains rotating graphs two, rotation Figure three, rotating graphs four, rotating graphs five, rotating graphs six, rotating graphs seven and rotating graphs eight, rotating graphs one, rotation Turn figure two, rotating graphs three, rotating graphs four, rotating graphs five, rotating graphs six, rotating graphs seven and rotating graphs octadentate And obtain closed figure, the circular coverage rate reduced radius of closed figure are that original 0.3844 times obtains required metal antenna The design shape of paster and size, obtain metal antenna paster according to design shape and size cutting；Described director is rectangle Bonding jumper one, the length and width of this rectangular metal bar one is respectively 10mm and 0.47mm, and its long side is upper and lower with medium substrate Side is parallel, and minor face is parallel with the left and right side of medium substrate, and the vertical range of central point and the upper and lower side of medium substrate is respectively For 28mm and 2mm, about central point and medium substrate, the vertical range of side is respectively 15mm and 15mm, and described reflector is square Shape bonding jumper two, the length and width of this rectangular metal bar two is respectively 18mm and 0.46mm, and its long side is upper with medium substrate Lower side is parallel, and minor face is parallel with the left and right side of medium substrate, and central point is divided with the vertical range of the upper and lower side of medium substrate Wei not 1mm and 29mm, the vertical range of side respectively 15mm and 15mm about central point and medium substrate；Described medium substrate The radius of upper four cylindrical cavities is 0.5mm, and the circle center line connecting of four cylindrical cavities constitutes the pros that the length of side is 22mm Shape, on this square, the following vertical range with the upper and lower side of medium substrate is respectively 3mm and 5mm, square left and right side and The vertical range of the medium substrate left and right sides is respectively 2mm and 6mm；One end of described cylindrical metal conductor is pasted with metal antenna Piece connects, and the material of cylindrical metal conductor is copper, its bottom surface radius r=0.5mm, thickness d=2.54mm, and cylindrical metal is led The junction center of circle of body and metal antenna paster and the vertical range of four sides of medium substrate respectively 16.57mm, 16.57mm, 13.43mm and 13.43mm, the aperture R=1.9mm of circular hole, institute on the earth plate relative with cylindrical metal conductor The output interface stating the cylindrical metal conductor other end is connected with energy management circuit, and this energy management circuit is used for absorbing Energy stored.

The technique effect of the present invention is：Suppression loss electromagnetic energy collection antenna has lower return loss, good resistance Anti- coupling and standing-wave ratio 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 suppression loss electromagnetic energy collection antenna structure view；

Fig. 3 is the return loss gathering antenna using the suppression loss electromagnetic energy of HFSS antenna modeling simulation software simulation Figure；

Fig. 4 is the suppression loss electromagnetic energy collection antenna standing wave ratio figure using the simulation of HFSS antenna modeling simulation software.

In figure：1st, dielectric passivation, 2, medium substrate, 3, earth plate, 4, metal antenna paster, 5, reflector, 6, guide into Device, 7, cylindrical metal conductor, 8, cylindrical cavity, 9, 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 suppression loss electromagnetic energy collection Antenna Design, needs to suppression in microstrip antenna designs System loss electromagnetic energy gathers the size of the metal antenna paster of antenna, and the size of medium substrate, thickness carry out theoretic estimation, The suppression loss electromagnetic energy collection antenna of suitable CF more quickly could be accurately found when simulated experiment.Institute By following taking rectangular microstrip antenna as a example, the theoretical calculation method of explanation each data parameters of microstrip antenna.

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 △ 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, suppression loss electromagnetic energy collection 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 4, reflector 5 and director 6, the middle part of medium substrate 2 is provided with and extends vertically through the cylindrical metal of medium substrate 2 and lead Body 7 and four cylindrical cavities 8, earth plate 3 is provided with the circular hole 9 concentric with cylindrical metal conductor 7 bottom surface；Described medium covers The material of cap rock 1 is Rogers RO6002, permittivity 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 4 is 0.0967 λ, and wherein λ=122mm, λ are the ripple of 2.45GHz radio frequency Long, thickness is 0.02mm, and 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 of the central point of metal antenna paster 4 and medium substrate 2 upper surface Point position consistency；The design shape of described metal antenna paster 4 and size meet following requirement, set up plane right-angle coordinate, By (0mm, -2.5mm) as starting point, (13.75mm, -2.5mm) be another end points along x-axis positive direction make one a length of The line segment one of 13.75mm, with point (13.75mm, -2.5mm) for the point of rotation, line segment one is rotated 112.5 ° in the counterclockwise direction, With curvilinear equationIntersection point be H (15.185mm, -5.965mm), with straight line y=-x for symmetry axis make Minute surface symmetrically obtains point L (5.965mm, -15.185mm), then the direction being 67.5 ° along line segment one and x-axis angle, in reference axis Extend to original 2 times in 4th interval and be extended line segment two, by extending line segment two, minute surface is made for symmetry axis with straight line y=-x Symmetrically it is extended line segment three, extend line segment two and the intersection point of prolongation line segment three is Difference tie point H (15.185mm, -5.965mm),And L (5.965mm, -15.185mm),Obtain line segment HW and line segment LW, Again by initial point (0mm, 0mm) as starting point, antenna patch shape design is carried out according to below equation：

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, line segment HW, line segment LW, initial graphics one and initial graphics Two merging obtain rotating graphs one, by rotating graphs one with pointFor The point of rotation, rotates 45 °, 90 °, 135,180 °, 225 °, 270 ° and 315 ° clockwise successively, respectively obtains rotating graphs two, rotation Figure three, rotating graphs four, rotating graphs five, rotating graphs six, rotating graphs seven and rotating graphs eight, rotating graphs one, rotation Turn figure two, rotating graphs three, rotating graphs four, rotating graphs five, rotating graphs six, rotating graphs seven and rotating graphs octadentate And obtain closed figure, the circular coverage rate reduced radius of closed figure are that original 0.3844 times obtains required metal antenna The design shape of paster 4 and size, obtain metal antenna paster 4 according to design shape and size cutting；Described director 6 is square Shape bonding jumper one, the length and width of this rectangular metal bar one is respectively 10mm and 0.47mm, and its long side is upper with medium substrate 2 Lower side is parallel, and minor face is parallel with the left and right side of medium substrate 2, the vertical range of central point and medium substrate side about 2 It is respectively 28mm and 2mm, central point is respectively 15mm and 15mm, described reflection with the vertical range of medium substrate 2 about side Device 5 is rectangular metal bar two, and the length and width of this rectangular metal bar two is respectively 18mm and 0.46mm, its long side and medium base The side up and down of plate 2 is parallel, and minor face is parallel with the left and right side of medium substrate 2, central point and medium substrate the hanging down of side about 2 Straight distance respectively 1mm and 29mm, central point is respectively 15mm and 15mm with the vertical range of medium substrate 2 about side；Institute The radius stating four cylindrical cavities 8 on medium substrate is 0.5mm, and the circle center line connecting of four cylindrical cavities 8 constitutes the length of side Square for 22mm, on this square, following and medium substrate side about 2 vertical range is respectively 3mm and 5mm, square About shape, side and the vertical range of medium substrate 2 left and right sides are respectively 2mm and 6mm；The one of described cylindrical metal conductor 7 End is connected with metal antenna paster 4, and the material of cylindrical metal conductor 7 is copper, its bottom surface radius r=0.5mm, and thickness d= 2.54mm, cylindrical metal conductor 7 vertical with 2 four sides in the junction center of circle and medium substrate of metal antenna paster 4 away from Circular hole on respectively 16.57mm, 16.57mm, 13.43mm and 13.43mm, the earth plate 3 relative with cylindrical metal conductor 7 9 aperture R=1.9mm, the output interface of described cylindrical metal conductor 7 other end is connected with energy management circuit, this energy Management circuit is used for being stored the energy absorbing.

Fig. 3 is the return loss gathering antenna using the suppression loss electromagnetic energy of HFSS antenna modeling simulation software simulation Figure, as seen from the figure, the return loss that this suppression loss electromagnetic energy gathers antenna is -37dB, returning than other same volume antennas Ripple loss is also little, and performance is very good.

Fig. 4 is the suppression loss electromagnetic energy collection antenna standing wave ratio figure using the simulation of HFSS antenna modeling simulation software, by Figure understands, it is 1.0866, closely 1 that this suppression loss electromagnetic energy gathers antenna in the standing-wave ratio of 2.45GHz.

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. suppression loss electromagnetic energy collection antenna is it is characterised in that include consistent size and medium bonded to each other covers from top to bottom Cap rock, medium substrate and earth plate, the medium substrate of side of wherein fitting with dielectric passivation is pasted with metal antenna paster, Reflector and director, the middle part of medium substrate is provided with the cylindrical metal conductor extending vertically through medium substrate and four cylinders Hole, 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 0.0967 λ, and wherein λ=122mm, λ are the wavelength of 2.45GHz radio frequency, and thickness is 0.02mm, and material is Copper, the material of described medium substrate is Rogers RO6010, permittivity 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 (0mm, -2.5mm) as 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 112.5 ° in the counterclockwise direction, with curvilinear equationIntersection point be H (15.185mm, -5.965mm), minute surface is made for symmetry axis with straight line y=-x symmetrical Obtain point L (5.965mm, -15.185mm), then the direction being 67.5 ° along line segment one and x-axis angle, interval in reference axis the 4th Inside extend to original 2 times and be extended line segment two, prolongation line segment two is made minute surface with straight line y=-x for symmetry axis and symmetrically obtains Extend line segment three, extend line segment two and the intersection point of prolongation line segment three is Difference tie point H (15.185mm, -5.965mm),And L (5.965mm, -15.185mm),Obtain line segment HW and line segment LW, Again by initial point (0mm, 0mm) as starting point, antenna patch shape design is carried out according to below equation：

Y=0 (0≤x≤2.5) (1)

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

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

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

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

$\begin{array}{ccc}y=\sqrt{-x^2+27.5x-175}-2.5& (-6.25\≤y\≤-5.965)& (10\≤x\≤15.185)\end{array}---\left(6\right)$

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, 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, rotates 45 °, 90 °, 135,180 °, 225 °, 270 ° and 315 ° successively clockwise, respectively obtains rotating graphs two, rotation figure Shape three, rotating graphs four, rotating graphs five, rotating graphs six, rotating graphs seven and rotating graphs eight, rotating graphs one, rotation Figure two, rotating graphs three, rotating graphs four, rotating graphs five, rotating graphs six, rotating graphs seven and rotating graphs octadentate are simultaneously Obtain closed figure, the circular coverage rate reduced radius of closed figure are that original 0.3844 times obtains required metal antenna patch The design shape of piece and size, obtain metal antenna paster according to design shape and size cutting；Described director is rectangle gold Belong to bar one, the length and width of this rectangular metal bar one is respectively 10mm and 0.47mm, the upper and lower sides of its long side and medium substrate Side is parallel, and minor face is parallel with the left and right side of medium substrate, and central point is respectively with the vertical range of the upper and lower side of medium substrate About 28mm and 2mm, central point and medium substrate, the vertical range of side is respectively 15mm and 15mm, and described reflector is rectangle Bonding jumper two, the length and width of this rectangular metal bar two is respectively 18mm and 0.46mm, and its long side is upper and lower with medium substrate Side is parallel, and minor face is parallel with the left and right side of medium substrate, and the vertical range of central point and the upper and lower side of medium substrate is respectively For 1mm and 29mm, about central point and medium substrate, the vertical range of side is respectively 15mm and 15mm；On described medium substrate The radius of four cylindrical cavities is 0.5mm, and the circle center line connecting of four cylindrical cavities constitutes the square that the length of side is 22mm, On this square, following and the upper and lower side of medium substrate vertical range is respectively 3mm and 5mm, square left and right side and medium The vertical range of the substrate left and right sides is respectively 2mm and 6mm；One end of described cylindrical metal conductor is with metal antenna paster even Connect, the material of cylindrical metal conductor is copper, its bottom surface radius r=0.5mm, thickness d=2.54mm, cylindrical metal conductor with The vertical range of the junction center of circle of metal antenna paster and four sides of medium substrate be respectively 16.57mm, 16.57mm, 13.43mm and 13.43mm, the aperture R=1.9mm of circular hole, described cylinder on the earth plate relative with cylindrical metal conductor The output interface of the metallic conductor other end is connected with energy management circuit, and this energy management circuit is used for entering the energy absorbing Row storage.