CN106374205A - Nine-angle microstrip antenna capable of eliminating loss - Google Patents

Abstract

The invention discloses a nine-angle microstrip antenna capable of eliminating loss. The nine-angle microstrip 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 is 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 nine-angle microstrip 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

Eliminate nine jiaos of microstrip antennas of loss

Technical field

The invention belongs to electromagnetic energy reception antenna technical field is and in particular to one kind is used for receiving radio-frequency (RF) energy in environment Eliminate loss nine jiaos of microstrip antennas.

Background technology

Wireless sensor network is with a wide range of applications, and is related to industry, agricultural, the hydrology, military and biomedical etc. Every field.Currently, battery remains the main energy sources of wireless sensor network, but the life-span of battery, size and Maintenance and renewal cost etc., are insupportable in some occasions, and are aided with using ambient radio-frequency energy collection technique chargeable Battery is then its more satisfactory power supply mode.

Content of the invention

Present invention solves the technical problem that nine jiaos that there is provided a kind of elimination loss simple and reasonable in design of structure micro- Band 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, eliminate nine jiaos of microstrip antennas of loss, 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, the middle part of medium substrate is provided with and extends vertically through medium base on the medium substrate of cover layer laminating side 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 0.10623 λ, and wherein λ=122mm, λ are the wavelength of 2.45ghz radio frequency, thick Spend for 0.02mm, material is copper, 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 center position of the central point of metal antenna paster and medium substrate upper surface Unanimously；The design shape of described metal antenna paster and size 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) Obtain line segment two, then the direction being 50 ° along line segment two and x-axis angle as 130 ° of point of rotation rotate counterclockwise, in coordinate axess the Extend to original 2 times in four intervals, be extended line segment two with straight lineMake minute surface for axis of symmetry symmetrically to be prolonged Long line segment three, extends line segment two and the intersection point of prolongation line segment three isThis point Straight lineOn, line segment two will be extended and extend the intersecting lens of line segment three in straight lineThe shorter line segment in both sides Part is left out respectively, again by initial point (0mm, 0mm) as starting point, makes the line segment of an a length of 2.5mm along x-axis positive direction, The center of circle being first curve with b (2.5mm, -1.25mm), with a (2.5mm, 0mm) for end point, with b₁(3.75mm ,- It is 1.25mm) another end points, radius r₁=1.25mm, makes angle of circumference and is 90 °, and direction is to protrude to x-axis and y-axis positive direction Circular arc, the center of circle being second curve with c (4.0625mm, -1.25mm), with b₁(3.75mm, -1.25mm) is end point, with c₁ (4.375mm, -1.25mm) is another end points, radius r₂=0.3125mm, makes angle of circumference and is 180 °, direction is along y-axis losing side To the circular arc protruding, the center of circle being the 3rd curve with d (4.6875mm, -1.25mm), with c₁(4.375mm, -1.25mm) is End point, with d₁(5mm, -1.25mm) is another end points, radius r₃=0.3125mm, makes angle of circumference and is 180 °, direction is along y The circular arc that axle positive direction is protruded, the center of circle being the 4th curve with e (5.625mm, -1.25mm), with d₁(5mm, -1.25mm) is End point, with e₁(6.25mm, -1.25mm) is another end points, radius r₄=0.625mm, makes angle of circumference and is 180 °, direction is The circular arc protruding along y-axis negative direction, the center of circle being the 5th curve with f (7.5mm, -1.25mm), with e₁(6.25mm ,- It is 1.25mm) end point, with f₁(7.5mm, 0mm) is another end points, radius r₅=1.25mm, makes angle of circumference and is 90 °, direction It is the circular arc protruding to x-axis negative direction and y-axis positive direction, the center of circle being the 6th curve with g (7.5mm, -2.5mm), with f₁ (7.5mm, 0mm) is end point, with g₁(10mm, -2.5mm) is another end points, radius r₆=2.5mm, makes angle of circumference and is 90 °, Direction is the circular arc protruding to x-axis and y-axis positive direction, and the center of circle being the 7th curve with h (11.875mm, -2.5mm), 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 protruding to y-axis negative direction, the center of circle being the 8th curve with i (16.25mm, -2.5mm), 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 protruding to x-axis negative direction and y-axis positive direction, with i₁(16.25mm, 0mm) is end point, b (18mm, 0mm) it is another end points, make the line segment that a length is 1.75mm, obtain initial graphics one in x-axis and y-axis plane, by initial graphics One with straight lineMake minute surface for axis of symmetry and symmetrically obtain initial graphics two, initial graphics one, initial graphics two, extended line Section two and prolongation line segment three merging obtain rotating graphs one, by rotating graphs one with point For the point of rotation, rotate 40 °, 80 °, 120 °, 160 °, 200 °, 240 °, 280 ° and 320 ° successively clockwise, respectively obtain rotation figure Shape two, rotating graphs three, rotating graphs four, rotating graphs five, rotating graphs six, rotating graphs seven, rotating graphs eight and rotation Figure nine, rotating graphs one, rotating graphs two, rotating graphs three, rotating graphs four, rotating graphs five, rotating graphs six, rotation Figure seven, rotating graphs eight and rotating graphs nine merge and obtain closed figure, by the radius contracting of the circular coverage rate of closed figure Little to the original 0.32146 times design shape obtaining required metal antenna paster and size, cut out according to design shape and size Cut and obtain metal antenna paster；One end of described cylindrical metal conductor is connected with metal antenna paster, cylindrical metal conductor Material be copper, its bottom surface radius r=0.5mm, thickness d=2.54mm, the company of cylindrical metal conductor and metal antenna paster The vertical dimension connecing the place center of circle with four sides of medium substrate is respectively 16.62mm, 16.62mm, 13.38mm and 13.38mm, with The aperture r=1.9mm of circular hole on the relative earth plate of cylindrical metal conductor, the output of the described cylindrical metal conductor other end Interface is connected with energy management circuit, and this energy management circuit is used for being stored the energy absorbing.

The technique effect of the present invention is: nine jiaos of microstrip antennas eliminating loss have lower return loss, good resistance Anti- coupling and standing-wave ratio and higher gain are such that it is able to radio-frequency (RF) energy in efficient reception environment.

Brief description

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

Fig. 2 is nine jiaos of microstrip antenna structure schematic diagrams eliminating loss；

Fig. 3 is the return loss of the nine jiaos of microstrip antennas eliminating loss using the simulation of hfss antenna modeling simulation software Figure；

Fig. 4 is the gain diagram of the nine jiaos of microstrip antennas eliminating loss using 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.

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 nine jiaos of microstrip antenna designs eliminating loss, needs in microstrip antenna designs to offset Except the size of the metal antenna paster of nine jiaos of microstrip antennas of loss, the size of medium substrate, thickness carry out theoretic estimation, Nine jiaos of microstrip antennas eliminating loss of suitable characteristic frequency more quickly could be accurately found when simulation 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:

$w=\frac{c}{2f_0}{\left(\frac{{\mathrm{\ϵ}}_r+1}{2}\right)}^{-\frac{1}{2}}---\left(1\right)$

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:

${\mathrm{\ϵ}}_{re}=\frac{{\mathrm{\ϵ}}_r+1}{2}+\frac{{\mathrm{\ϵ}}_r-1}{2}{(1+12\frac{h}{w})}^{-\frac{1}{2}}---\left(2\right)$

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:

$h\≤\frac{0.3c}{2{\mathrm{\πf}}_u\sqrt{{\mathrm{\ϵ}}_r}}---\left(3\right)$

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 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, nine jiaos of microstrip antennas of loss are eliminated, 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, 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 0.10623 λ, and wherein λ=122mm, λ are the wavelength of 2.45ghz radio frequency, and thickness is 0.02mm, and material is copper, described medium The material of 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 upper surface；The design of described metal antenna paster 4 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 Make the line segment one of an a length of 18mm, line segment one is obtained line with point (18mm, 0mm) for 130 ° as point of rotation rotate counterclockwise Section two, then the direction being 50 ° along line segment two and x-axis angle, extend to original 2 times in coordinate axess the 4th interval, are prolonged Long line segment two is with straight lineMake minute surface for axis of symmetry and be symmetrically extended line segment three, extend line segment two and extend line segment Three intersection point isThis point is in straight lineOn, line segment two He will be extended The intersecting lens extending line segment three is in straight lineThe shorter line segment part in both sides is left out respectively, 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) for first song 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, Make angle of circumference and be 90 °, direction is the circular arc protruding 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, make angle of circumference be 180 °, direction be along y-axis negative direction protrude circular arc, with d (4.6875mm ,- 1.25mm) be the 3rd curve the center of circle, with c₁(4.375mm, -1.25mm) is end point, with d₁(5mm, -1.25mm) is another End point, radius r₃=0.3125mm, makes angle of circumference and is 180 °, direction is the circular arc protruding 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 ,- It is 1.25mm) another end points, radius r₄=0.625mm, makes angle of circumference and is 180 °, and direction is the circle protruding along y-axis negative direction Arc, the center of circle being the 5th curve with f (7.5mm, -1.25mm), 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 and is 90 °, and direction to x-axis negative direction and y-axis is just The circular arc that direction is protruded, the center of circle being the 6th curve with g (7.5mm, -2.5mm), with f₁(7.5mm, 0mm) is end point, with g₁(10mm, -2.5mm) is another end points, radius r₆=2.5mm, makes angle of circumference and is 90 °, direction is to x-axis and y-axis positive direction The circular arc protruding, the center of circle being the 7th curve with h (11.875mm, -2.5mm), with g₁(10mm, -2.5mm) is end point, With h₁(13.75mm, -2.5mm) is another end points, radius r₇=1.875mm, makes angle of circumference and is 180 °, and direction is to bear to y-axis The circular arc that direction is protruded, the center of circle being the 8th curve with i (16.25mm, -2.5mm), with h₁(13.75mm, -2.5mm) is one End points, with i₁(16.25mm, 0mm) is another end points, radius r₈=2.5mm, makes angle of circumference and is 90 °, 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 Length is the line segment of 1.75mm, obtains initial graphics one, by initial graphics one with straight line in x-axis and y-axis plane Make minute surface for axis of symmetry and symmetrically obtain initial graphics two, initial graphics one, initial graphics two, prolongation line segment two and prolongation line segment three Merge and obtain rotating graphs one, by rotating graphs one with pointFor the point of rotation, suitable Hour hands rotate 40 °, 80 °, 120 °, 160 °, 200 °, 240 °, 280 ° and 320 ° successively, respectively obtain rotating graphs two, rotation figure Shape three, rotating graphs four, rotating graphs five, rotating graphs six, rotating graphs seven, rotating graphs eight and rotating graphs nine, rotation Figure one, rotating graphs two, rotating graphs three, rotating graphs four, rotating graphs five, rotating graphs six, rotating graphs seven, rotation Figure eight and rotating graphs nine merge and obtain closed figure, by the reduced radius of the circular coverage rate of closed figure to original 0.32146 times of design shape obtaining required metal antenna paster 4 and size, obtain metal according to design shape and size cutting Antenna patch 4；One end of described cylindrical metal conductor 5 is connected with metal antenna paster 4, the material of cylindrical metal conductor 5 For copper, its bottom surface radius r=0.5mm, thickness d=2.54mm, the junction of cylindrical metal conductor 5 and metal antenna paster 4 The center of circle is respectively 16.62mm, 16.62mm, 13.38mm and 13.38mm with the vertical dimension of 2 four sides of medium substrate, with circle The aperture r=1.9mm of circular hole 6 on the relative earth plate of cylindricality metallic conductor 53, described cylindrical metal conductor 5 other end defeated Outgoing interface is connected with energy management circuit, and this energy management circuit is used for being stored the energy absorbing.

Fig. 3 is the return loss of the nine jiaos of microstrip antennas eliminating loss using the simulation of hfss antenna modeling simulation software Figure, as seen from the figure, the return loss of nine jiaos of microstrip antennas of this elimination loss is -38db, returning than other same volume antennas Ripple loss is also little, and performance is very good.

Fig. 4 is nine jiaos of microstrip antennas of the elimination loss using the simulation of hfss antenna modeling simulation software in xz plane Gain diagram, as seen from the figure, nine jiaos of microstrip antennas of this elimination loss are 3.41db in the maximum gain of 2.45ghz, and directivity is non- Normal stablizes.

Embodiment above describes ultimate 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 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. eliminate nine jiaos of microstrip antennas of loss it is characterised in that including 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, The middle part of medium substrate is provided with the cylindrical metal conductor extending vertically through medium substrate, and 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, 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 0.10623 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 following wanting 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, line segment one is obtained line segment two with point (18mm, 0mm) for 130 ° as point of rotation rotate counterclockwise, then along line segment two and x-axis Angle is 50 ° of direction, extends to original 2 times in coordinate axess the 4th interval, is extended line segment two with straight lineMake minute surface for axis of symmetry and be symmetrically extended line segment three, extend line segment two and the intersection point of prolongation line segment three isThis point is in straight lineOn, line segment two will be extended and extend line segment three Intersecting lens in straight lineThe shorter line segment part in both sides is left out respectively, plays initial point (0mm, 0mm) conduct again Point, makes the line segment of an a length of 2.5mm along x-axis positive direction, the center of circle being first curve with b (2.5mm, -1.25mm), with A (2.5mm, 0mm) is end point, with b₁(3.75mm, -1.25mm) is another end points, radius r₁=1.25mm, makes angle of circumference For 90 °, direction is the circular arc protruding to x-axis and y-axis positive direction, the circle being second curve with c (4.0625mm, -1.25mm) The heart, with b₁(3.75mm, -1.25mm) is end point, with c₁(4.375mm, -1.25mm) is another end points, radius r₂= 0.3125mm, makes angle of circumference and is 180 °, direction is the circular arc protruding along y-axis negative direction, with d (4.6875mm, -1.25mm) 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 points, half Footpath r₃=0.3125mm, make angle of circumference be 180 °, direction be along y-axis positive direction protrude circular arc, with e (5.625mm ,- 1.25mm) be the 4th curve the center of circle, with d₁(5mm, -1.25mm) is end point, with e₁(6.25mm, -1.25mm) is another End points, radius r₄=0.625mm, make angle of circumference be 180 °, direction be along y-axis negative direction protrude circular arc, with f (7.5mm ,- 1.25mm) be the 5th curve the center of circle, with e₁(6.25mm, -1.25mm) is end point, with f₁(7.5mm, 0mm) is the other end Point, radius r₅=1.25mm, makes angle of circumference and is 90 °, and direction is the circular arc protruding to x-axis negative direction and y-axis positive direction, with g (7.5mm, -2.5mm) is the center of circle of the 6th curve, with f₁(7.5mm, 0mm) is end point, with g₁(10mm, -2.5mm) is another End point, radius r₆=2.5mm, makes angle of circumference and is 90 °, and direction is the circular arc protruding to x-axis and y-axis positive direction, with h (11.875mm, -2.5mm) is the center of circle of the 7th curve, with g₁(10mm, -2.5mm) is end point, with h₁(13.75mm ,- It is 2.5mm) another end points, radius r₇=1.875mm, makes angle of circumference and is 180 °, and direction is the circle protruding to y-axis negative direction Arc, the center of circle being the 8th curve with i (16.25mm, -2.5mm), with h₁(13.75mm, -2.5mm) is end point, with i₁ (16.25mm, 0mm) is another end points, radius r₈=2.5mm, makes angle of circumference and is 90 °, direction is to x-axis negative direction and y-axis The circular arc that positive direction is protruded, with i₁(16.25mm, 0mm) is end point, and b (18mm, 0mm) is another end points, makees a length and is The line segment of 1.75mm, obtains initial graphics one, by initial graphics one with straight line in x-axis and y-axis planeFor symmetrical Axle is made minute surface and is symmetrically obtained initial graphics two, and initial graphics one, initial graphics two, prolongation line segment two and prolongation line segment three merge To rotating graphs one, by rotating graphs one with pointFor the point of rotation, clockwise according to Secondary rotation 40 °, 80 °, 120 °, 160 °, 200 °, 240 °, 280 ° and 320 °, respectively obtain rotating graphs two, rotating graphs three, rotation Turn figure four, rotating graphs five, rotating graphs six, rotating graphs seven, rotating graphs eight and rotating graphs nine, rotating graphs one, Rotating graphs two, rotating graphs three, rotating graphs four, rotating graphs five, rotating graphs six, rotating graphs seven, rotating graphs eight Merge with rotating graphs nine and obtain closed figure, by the reduced radius of the circular coverage rate of closed figure to original 0.32146 Obtain design shape and the size of required metal antenna paster again, obtain metal antenna patch according to design shape and size cutting Piece；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 junction center of circle 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 16.62mm, 16.62mm, 13.38mm and 13.38mm, relative with cylindrical metal conductor Earth plate on circular hole aperture r=1.9mm, the output interface of the described cylindrical metal conductor other end and energy management circuit It is connected, this energy management circuit is used for being stored the energy absorbing.