CN106450692A - Low-back lobe high-frequency energy absorption antenna - Google Patents

Abstract

The invention discloses a low-back lobe high-frequency energy absorption antenna. The low-back lobe high-frequency energy absorption antenna comprises a dielectric coverage layer, a dielectric substrate and a grounding plate which are consistent in size from top to bottom and are attached to one another, wherein a metal antenna patch, a director and an emitter are attached onto one side of the dielectric substrate which is attached to the dielectric coverage layer, a cylindrical metal conductor is arranged in the middle part of the dielectric substrate and vertically penetrates through the dielectric substrate, and a round hole is formed in the grounding plate and is concentric with a bottom surface of the cylindrical metal conductor. The low-back lobe high-frequency energy absorption antenna has lower return loss, good impedance matching and standing-wave ratio and relatively high gain, so that radio frequency energy in an environment can be efficiently received.

Description

Low back lobe high-frequency energy absorbs antenna

Technical field

The invention belongs to electromagnetic energy reception antenna technical field, and in particular to a kind of for receiving radio-frequency (RF) energy in environment Low back lobe high-frequency energy absorb antenna.

Background technology

At home, start late with regard to the transmission technology research in the radio-frequency wireless energy confined space, rapidly send out in science and technology Today of exhibition, with economic progress and the raising of scientific research level, increasing company and scientific research institution begin to focus on and open The research of exhibition this respect, carries out the collection of radio frequency energy in the confined space.

Content of the invention

Present invention solves the technical problem that there is provided a kind of simple structure and low back lobe high-frequency energy suction reasonable in design Antenna is received, the antenna is compared with the less size having for other antennas, relatively low clawback loss, good impedance matching Higher gain.

The present invention is adopted the following technical scheme that for solving above-mentioned technical problem, and low back lobe high-frequency energy absorbs antenna, and which is special Levy and be to include consistent size from top to bottom and dielectric passivation bonded to each other, medium substrate and earth plate, wherein with medium Metal antenna paster, director and reflector are pasted with the medium substrate of cover layer laminating side, the middle part of medium substrate sets There is the cylindrical metal conductor for extending vertically through medium substrate, earth plate is provided with the circle concentric with cylindrical metal conductor bottom surface Hole；The material of the 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 the metal antenna paster for 0.09672 λ, wherein λ=122mm, λ is 2.45GHz the wavelength of radio frequency, it is copper that thickness is 0.02mm, material, and the material of the medium substrate is Rogers RO6010, 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 the metal antenna paster and size meet following requirement, set up flat Face rectangular coordinate system, by initial point (0mm, 0mm) as starting point, makes the line segment one of an a length of 18mm, by line along x-axis positive direction Section one obtains line segment two with point (18mm, 0mm) for 120 ° as point of rotation rotate counterclockwise, by line segment two with straight line Make minute surface for axis of symmetry and line segment three is symmetrically obtained, the intersection point of line segment two and line segment three isThis point is straight LineOn, 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)

Y=0 (16.25≤x≤18) (10)

To be joined end to end by the whole curves obtained by formula successively, in x-axis and y-axis plane, initial graphics one obtained, By initial graphics one with straight lineMake minute surface for axis of symmetry and symmetrically obtain initial graphics two, initial graphics one, initial graph Shape two, line segment two and the merging of line segment three obtain rotating graphs one, by rotating graphs one with pointFor rotation Point, rotates 60 °, 120 °, 180 °, 240 ° and 300 ° clockwise successively, respectively obtains rotating graphs two, rotating graphs three, rotation Figure four, rotating graphs five and rotating graphs six, rotating graphs one, rotating graphs two, rotating graphs three, rotating graphs four, rotation Turn figure five and the rotating graphs six directions and closed figure is obtained, by the reduced radius of the circular coverage rate of closed figure to original 0.37848 times of design shape for obtaining required metal antenna paster and size, obtain metal according to design shape and size cutting Antenna patch；The director is rectangular metal bar one, the length and width of the rectangular metal bar one be respectively 10mm and 0.47mm, its long side is parallel with the side up and down of medium substrate, and minor face is parallel with the left and right side of medium substrate, central point and Jie The vertical dimension of the upper and lower side of matter substrate be respectively 28.2mm and 1.8mm, central point vertical with medium substrate or so side away from From respectively 15mm and 15mm, the reflector is that rectangular metal bar two, the length and width of the rectangular metal bar two is respectively 18mm and 0.46mm, its long side is parallel with the side up and down of medium substrate, and minor face is parallel with the left and right side of medium substrate, center Point is respectively 1.7mm and 28.3mm, central point and medium substrate or so side with the vertical dimension of the upper and lower side of medium substrate Vertical dimension is respectively 15mm and 15mm；One end of the cylindrical metal conductor is connected with metal antenna paster, cylindrical gold The material of category conductor is copper, its bottom surface radius r=0.5mm, thickness d=2.54mm, and cylindrical metal conductor is pasted with metal antenna The vertical dimension of four sides in the junction center of circle of piece and medium substrate be respectively 16.62mm, 16.62mm, 13.38mm and 13.38mm, the aperture R=1.9mm of circular hole on the earth plate relative with cylindrical metal conductor, the cylindrical metal conductor is another The output interface of one end is connected with energy management circuit, and the energy management circuit is used for being stored the energy for absorbing.

The technique effect of the present invention is：Low back lobe high-frequency energy absorbs antenna and 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.

Description of the drawings

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

Fig. 2 is that low back lobe high-frequency energy absorbs antenna structure view；

Fig. 3 is the return loss for absorbing antenna using the low back lobe high-frequency energy of HFSS antenna modeling simulation software simulation Figure；

Fig. 4 is the 3D gain diagram for absorbing antenna using the low back lobe high-frequency energy of HFSS antenna modeling simulation software simulation.

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, 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 low back lobe high-frequency energy absorbs Antenna Design, needs to low in microstrip antenna designs Back lobe high-frequency energy absorbs the size of the metal antenna paster of antenna, and the size of medium substrate, thickness carry out theoretic estimation, The low back lobe high-frequency energy that more quickly could accurately find suitable characteristic frequency when simulation experiment absorbs antenna.Institute By following by taking rectangular microstrip antenna as an example, the theoretical calculation method of each data parameters of microstrip antenna is explained.

Patch size L × W, patch width W is：

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：

H represents thickness of dielectric layers, and in order to reduce impact of the surface wave to antenna performance, 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 the length and width of rectangular patch is determined, typically The normal impedance of 50 Ω is added in microstrip antenna.

As shown in Figure 1-2, low back lobe high-frequency energy absorbs 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, are pasted with metal on the medium substrate 2 of side of wherein fitting with dielectric passivation 1 Antenna patch 4, director 6 and reflector 5, 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, earth plate 3 is provided with the circular hole 8 concentric with 7 bottom surface of cylindrical metal conductor；The material of the dielectric passivation 1 is Rogers RO6002, DIELECTRIC CONSTANT ε_r=2.94, thickness d=0.51mm, length and width is 30mm；The metal antenna The radius of the circular coverage rate of paster 4 is 0.09672 λ, and wherein λ=122mm, λ are the wavelength of 2.45GHz radio frequency, and thickness is 0.02mm, it is Rogers RO6010 that material is the material of copper, the medium substrate 2, DIELECTRIC CONSTANT 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 2 upper surface of medium substrate Unanimously；The design shape of the metal antenna paster 4 and size meet following requirement, set up plane right-angle coordinate, by initial point (0mm, 0mm) makes the line segment one of an a length of 18mm as starting point along x-axis positive direction, by line segment one with point (18mm, 0mm) As point of rotation rotate counterclockwise, 120 ° obtain line segment two, by line segment two with straight lineMake minute surface for axis of symmetry symmetrical Line segment three is obtained, the intersection point of line segment two and line segment three isThis point is in straight lineOn, 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)

Y=0 (16.25≤x≤18) (10)

To be joined end to end by the whole curves obtained by formula successively, in x-axis and y-axis plane, initial graphics one obtained, By initial graphics one with straight lineMake minute surface for axis of symmetry and symmetrically obtain initial graphics two, initial graphics one, initial graph Shape two, line segment two and the merging of line segment three obtain rotating graphs one, by rotating graphs one with pointFor rotation Point, rotates 60 °, 120 °, 180 °, 240 ° and 300 ° clockwise successively, respectively obtains rotating graphs two, rotating graphs three, rotation Figure four, rotating graphs five and rotating graphs six, rotating graphs one, rotating graphs two, rotating graphs three, rotating graphs four, rotation Turn figure five and the rotating graphs six directions and closed figure is obtained, by the reduced radius of the circular coverage rate of closed figure to original 0.37848 times of design shape for obtaining required metal antenna paster 4 and size, obtain metal according to design shape and size cutting Antenna patch 4；The director 6 is rectangular metal bar one, the length and width of the rectangular metal bar one be respectively 10mm and 0.47mm, its long side is parallel with the side up and down of medium substrate 2, and minor face is parallel with the left and right side of medium substrate 2, central point with The vertical dimension of medium substrate side about 2 is respectively 28.2mm and 1.8mm, and central point is hung down with 2 or so side of medium substrate Straight distance respectively 15mm and 15mm, the reflector 5 is that rectangular metal bar two, the length and width of the rectangular metal bar two is divided Not Wei 18mm and 0.46mm, its long side is parallel with the side up and down of medium substrate 2, and the left and right side of minor face and medium substrate 2 is put down OK, central point is respectively 1.7mm and 28.3mm with the vertical dimension of medium substrate side about 2, and central point is left with medium substrate 2 The vertical dimension of right edge is respectively 15mm and 15mm；One end of the cylindrical metal conductor 7 is with metal antenna paster 4 even Connect, the material of cylindrical metal conductor 7 is copper, its bottom surface radius r=0.5mm, thickness d=2.54mm, cylindrical metal conductor 7 With the vertical dimension of 2 four sides in the junction center of circle and medium substrate of metal antenna paster 4 be respectively 16.62mm, 16.62mm, 13.38mm and 13.38mm, the aperture R=1.9mm of circular hole 8 on the earth plate 3 relative with cylindrical metal conductor 7, The output interface of 7 other end of cylindrical metal conductor is connected with energy management circuit, and the energy management circuit is used for inhaling The energy for receiving is stored.

Fig. 3 is the return loss for absorbing antenna using the low back lobe high-frequency energy of HFSS antenna modeling simulation software simulation Figure, as seen from the figure, it is -36dB that the low back lobe high-frequency energy absorbs the return loss of antenna, returning than other same volume antennas Ripple loss is also little, and performance is very good.

Fig. 4 is the 3D gain diagram for absorbing antenna using the low back lobe high-frequency energy of HFSS antenna modeling simulation software simulation, As seen from the figure, it is 3.83dB that the low back lobe high-frequency energy absorbs antenna in the gain of 2.45GHz, and directivity is very stable.

Ultimate principle, principal character and the advantage of the present invention is embodiment above describes, the technical staff of the industry should Understand, the present invention is not restricted to the described embodiments, the original that the present invention is simply described described in above-described embodiment and description 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. low back lobe high-frequency energy absorbs antenna, it is characterised in that including consistent size from top to bottom and medium bonded to each other covers Cap rock, medium substrate and earth plate, be pasted with the medium substrate of side of wherein fitting with dielectric passivation metal antenna paster, Director and reflector, the middle part of medium substrate is provided with the cylindrical metal conductor for extending vertically through medium substrate, sets on earth plate There is the circular hole concentric with cylindrical metal conductor bottom surface；The material of the 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 the metal antenna paster For 0.09672 λ, wherein λ=122mm, λ is the wavelength of 2.45GHz radio frequency, and it is copper that thickness is 0.02mm, material, the medium base The material of plate is Rogers RO6010, DIELECTRIC CONSTANT ε_r=10.2, thickness d=2.54mm, length and width is 30mm, gold The central point of category antenna patch is consistent with the center position of medium substrate upper surface；The design shape of the metal antenna paster And size meets following requirement, sets up plane right-angle coordinate, by initial point (0mm, 0mm) as starting point, makes along x-axis positive direction The line segment one of one a length of 18mm, line segment one is obtained line segment with point (18mm, 0mm) for 120 ° as point of rotation rotate counterclockwise Two, by line segment two with straight lineMake minute surface for axis of symmetry and line segment three is symmetrically obtained, the intersection point of line segment two and line segment three isThis point is in straight lineOn, again by initial point (0mm, 0mm) as starting point, according to following public affairs Formula carries out antenna patch shape design：

Y=0 (0≤x≤2.5) (1)

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

$\begin{array}{ccc}y=\sqrt{-x^2+8.125x-16.40625}-1.25& (-1.5625\≤y\≤-1.25)& (3.75\≤x\≤4.375)\end{array}---\left(3\right)$

$\begin{array}{ccc}y=\sqrt{-x^2+9.375x-21.875}-1.25& (-1.25\≤y\≤-0.9375)& (4.375\≤x\≤5)\end{array}---\left(4\right)$

$\begin{array}{ccc}y=\sqrt{-x^2+11.25x-31.25}-1.25& (-1.875\≤y\≤-1.25)& (5\≤x\≤6.25)\end{array}---\left(5\right)$

$\begin{array}{ccc}y=\sqrt{-x^2+15x-54.6875}-1.25& (-1.25\≤y\≤0)& (6.25\≤x\≤7.5)\end{array}---\left(6\right)$

$\begin{array}{ccc}y=\sqrt{-x^2+15x-50}-2.5& (-2.5\≤y\≤0)& (7.5\≤x\≤10)\end{array}---\left(7\right)$

$\begin{array}{ccc}y=\sqrt{-x^2+23.75x-137.5}-2.5& (-5\≤y\≤-2.5)& (10\≤x\≤13.75)\end{array}---\left(8\right)$

$\begin{array}{ccc}y=\sqrt{-x^2+32.5x-257.8125}-2.5& (-2.5\≤y\≤0)& (13.75\≤x\≤16.25)\end{array}---\left(9\right)$

Y=0 (16.25≤x≤18) (10)

To be joined end to end by the whole curves obtained by formula successively, initial graphics one are obtained in x-axis and y-axis plane, will be just Beginning figure one is with straight lineMake minute surface for axis of symmetry and symmetrically obtain initial graphics two, initial graphics one, initial graphics 2nd, line segment two and the merging of line segment three obtain rotating graphs one, by rotating graphs one with pointFor rotation Point, rotates 60 °, 120 °, 180 °, 240 ° and 300 ° clockwise successively, respectively obtains rotating graphs two, rotating graphs three, rotation Figure four, rotating graphs five and rotating graphs six, rotating graphs one, rotating graphs two, rotating graphs three, rotating graphs four, rotation Turn figure five and the rotating graphs six directions and closed figure is obtained, by the reduced radius of the circular coverage rate of closed figure to original 0.37848 times of design shape for obtaining required metal antenna paster and size, obtain metal according to design shape and size cutting Antenna patch；The director is rectangular metal bar one, the length and width of the rectangular metal bar one be respectively 10mm and 0.47mm, its long side is parallel with the side up and down of medium substrate, and minor face is parallel with the left and right side of medium substrate, central point and Jie The vertical dimension of the upper and lower side of matter substrate be respectively 28.2mm and 1.8mm, central point vertical with medium substrate or so side away from From respectively 15mm and 15mm, the reflector is that rectangular metal bar two, the length and width of the rectangular metal bar two is respectively 18mm and 0.46mm, its long side is parallel with the side up and down of medium substrate, and minor face is parallel with the left and right side of medium substrate, center Point is respectively 1.7mm and 28.3mm, central point and medium substrate or so side with the vertical dimension of the upper and lower side of medium substrate Vertical dimension is respectively 15mm and 15mm；One end of the cylindrical metal conductor is connected with metal antenna paster, cylindrical gold The material of category conductor is copper, its bottom surface radius r=0.5mm, thickness d=2.54mm, and cylindrical metal conductor is pasted with metal antenna The vertical dimension of four sides in the junction center of circle of piece and medium substrate be respectively 16.62mm, 16.62mm, 13.38mm and 13.38mm, the aperture R=1.9mm of circular hole on the earth plate relative with cylindrical metal conductor, the cylindrical metal conductor is another The output interface of one end is connected with energy management circuit, and the energy management circuit is used for being stored the energy for absorbing.