CN106374201A - Radio-frequency energy collection microstrip antenna capable of lowering return loss - Google Patents

Abstract

The invention discloses a radio-frequency energy collection microstrip antenna capable of lowering return loss. The radio-frequency energy collection microstrip antenna comprises a dielectric covering layer, a dielectric substrate an a grounding plate which are consistent in dimension top to bottom and are mutually laminated, wherein a metal antenna patch is attached to the dielectric substrate on one side laminated with the dielectric covering layer; a cylindrical metal conductor which perpendicularly runs through the dielectric substrate is arranged in the middle part of the dielectric substrate; and a circular hole which is concentric with the bottom surface of the cylindrical metal conductor is formed in the grounding plate. The radio-frequency energy collection microstrip antenna has lower return loss, good impedance matching and standing-wave ratio, and relatively high gain, so radio frequency energy in an environment can be efficiently received.

Description

Reduce return loss radio-frequency (RF) energy and collect microstrip antenna

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 Reduction return loss radio-frequency (RF) energy collect microstrip antenna.

Background technology

Currently, more and more miniature or portable radio communication device or network node are applied in actual life, The main energy sources supply source of these wireless devices is battery.But the use of battery introduces no small volume to wireless device, Additionally, the restricted lifetime of battery, for the wireless device of some specific occasions application, such as wireless sensor network node, implantation Formula electronic equipment etc., the cost changing battery is very expensive, and old and useless battery also easily causes environmental pollution.With ultralow work( The development of consumption integrated circuit technique, the power consumption of electronic microsystem has been enter into microwatt level scope so as to using penetrating in surrounding Frequency energy is possibly realized for power itself.

Content of the invention

Present invention solves the technical problem that there is provided a kind of structure reduction return loss radio frequency simple and reasonable in design Collection of energy microstrip antenna, the less size having for the more other antenna of this antenna, relatively low clawback are lost, well Impedance matching and higher gain.

The present invention is to solve above-mentioned technical problem to adopt the following technical scheme that, reduces return loss radio-frequency (RF) energy and collects micro-strip Antenna it is characterised in that including consistent size and dielectric passivation bonded to each other, medium substrate and earth plate from top to bottom, its In fit with dielectric passivation side medium substrate on be pasted with metal antenna paster, the middle part of medium substrate is provided with vertically to be passed through Wear the cylindrical metal conductor of medium substrate, earth plate is provided with the circular hole concentric with cylindrical metal conductor bottom surface；Given an account of The material of matter cover layer 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 0.1083 λ, and wherein λ=122mm, λ are 2.45ghz radio frequency Wavelength, thickness is 0.02mm, and material is copper, and the material of described medium substrate is rogers ro6010, DIELECTRIC CONSTANT ε_r= 10.2, thickness d=2.54mm, length and width is 30mm, the central point of metal antenna paster and medium substrate upper surface Center position is consistent；The design shape of described metal antenna paster and size meet following requirement, set up plane rectangular coordinates System, by initial point (0mm, 0mm) as starting point, makes the line segment one of an a length of 18mm, by line segment one with point along x-axis positive direction (18mm, 0mm) obtains line segment two for 105 ° as point of rotation rotate counterclockwise, by line segment two with straight lineFor axis of symmetry Make minute surface and symmetrically obtain line segment three, the intersection point of line segment two and line segment three is This point is in straight lineOn, by the intersecting lens of line segment two and line segment three in straight lineThe shorter line segment portion in both sides Divide and leave 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) is the center of circle of first curve, with a (2.5mm, 0mm) for end point, with b₁(3.75mm, -1.25mm) For another end points, radius r₁=1.25mm, makes angle of circumference and is 90 °, and direction is the circular arc protruding to x-axis and y-axis positive direction, with C (4.0625mm, -1.25mm) is the center of circle of 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, 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) is another end points, makees the line segment that a length is 1.75mm, obtains initial graphics one in x-axis and y-axis plane, will 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 two, line Section two and line segment three merging obtain rotating graphs one, by rotating graphs one with point For the point of rotation, turn clockwise successively 50 °, 100 °, 150 °, 200 °, 250 °, 300 °, 350 °, 400 °, 450 °, 500 °, 550 °, 600 °, 650 °, 700 °, 750 °, 800 °, 850 °, 900 °, 950 °, 1000 ° and 1050 ° respectively obtain rotating graphs two, rotation figure Shape three, rotating graphs four, rotating graphs five, rotating graphs six, rotating graphs seven, rotating graphs eight, rotating graphs nine, rotation figure Shape ten, rotating graphs 11, rotating graphs 12, rotating graphs 13, rotating graphs 14, rotating graphs 15, rotation figure Shape 16, rotating graphs 17, rotating graphs 18, rotating graphs 19, rotating graphs 20 and rotating graphs 21, rotation Turn figure one, rotating graphs two, rotating graphs three, rotating graphs four, rotating graphs five, rotating graphs six, rotating graphs seven, rotation Turn figure eight, rotating graphs nine, rotating graphs ten, rotating graphs 11, rotating graphs 12, rotating graphs 13, rotation figure Shape 14, rotating graphs 15, rotating graphs 16, rotating graphs 17, rotating graphs 18, rotating graphs 19, rotation Figure 20 and rotating graphs 21 merge and obtain closed figure, by the reduced radius of the circular coverage rate of closed figure to former The 0.55 times of design shape obtaining required metal antenna paster coming and size, obtain metal according to design shape and size cutting Antenna patch；One end of described cylindrical metal conductor is connected with metal antenna paster, and the material of cylindrical metal conductor is copper, The junction center of circle of its bottom surface radius r=0.5mm, thickness d=2.54mm, cylindrical metal conductor and metal antenna paster and Jie The vertical dimension of four sides of matter substrate is respectively 16.5mm, 16.5mm, 13.5mm and 13.5mm, with cylindrical metal conductor phase To earth plate on circular hole aperture r=1.9mm, the output interface of the described cylindrical metal conductor other end and energy management electricity Road is connected, and this energy management circuit is used for being stored the energy absorbing.

The technique effect of the present invention is: reduces return loss radio-frequency (RF) energy collection microstrip antenna and has lower echo damage Consumption, good impedance matching 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 to reduce return loss radio-frequency (RF) energy to collect microstrip antenna structure schematic diagram；

Fig. 3 is to collect microstrip antenna using the reduction return loss radio-frequency (RF) energy of hfss antenna modeling simulation software simulation Return loss plot；

Fig. 4 is to collect microstrip antenna using the reduction return loss radio-frequency (RF) energy of hfss antenna modeling simulation software simulation to stay Bob figure.

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 to reduce return loss radio-frequency (RF) energy to collect microstrip antenna designs, in microstrip antenna designs When need to reduce return loss radio-frequency (RF) energy collect microstrip antenna metal antenna paster size, the size of medium substrate, Thickness carries out theoretic estimation, more quickly could accurately find the reduction of suitable characteristic frequency when simulation experiment Return loss radio-frequency (RF) energy collects microstrip antenna.So below, explaining each data of microstrip antenna taking rectangular microstrip antenna as a example The theoretical calculation method of parameter.

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:

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

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, reduce return loss radio-frequency (RF) energy and collect microstrip antenna, including consistent size from top to bottom and phase Mutually the dielectric passivation 1 of laminating, medium substrate 2 and earth plate 3, are wherein fitted with dielectric passivation 1 on the medium substrate 2 of side It is pasted with metal antenna paster 4, the middle part of medium substrate 2 is provided with the cylindrical metal conductor 5 extending vertically through medium substrate 2, connects Floor 3 is provided with the circular hole concentric with cylindrical metal conductor 5 bottom surface；The material of described dielectric passivation 1 is Rogersro6002, DIELECTRIC CONSTANT ε_r=2.94, thickness d=0.51mm, length and width is 30mm；Described metal antenna patch The radius of the circular coverage rate of piece 4 is 0.1083 λ, and wherein λ=122mm, λ are the wavelength of 2.45ghz radio frequency, and thickness is 0.02mm, 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 center position one of the central point of metal antenna paster and medium substrate upper surface Cause；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) As point of rotation rotate counterclockwise, 105 ° obtain line segment two, by line segment two with straight lineMake minute surface for axis of symmetry symmetrical Obtain line segment three, the intersection point of line segment two and line segment three isThis point is in straight lineOn, by the intersecting lens of line segment two and line segment three in straight lineThe shorter line segment part in both sides is deleted respectively Go, 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) be first curve the center of circle, with a (2.5mm, 0mm) be end point, with b₁(3.75mm, -1.25mm) is the other end Point, radius r₁=1.25mm, makes angle of circumference and is 90 °, and direction is the circular arc protruding to x-axis and y-axis positive direction, with c (4.0625mm, -1.25mm) is the center of circle of 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, 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 angle of circumference For 90 °, 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, line segment two Merge with line segment three and obtain rotating graphs one, by rotating graphs one with pointFor rotation Turning point, turn clockwise successively 50 °, 100 °, 150 °, 200 °, 250 °, 300 °, 350 °, 400 °, 450 °, 500 °, 550 °, 600 °, 650 °, 700 °, 750 °, 800 °, 850 °, 900 °, 950 °, 1000 ° and 1050 ° respectively obtain rotating graphs two, rotation figure Shape three, rotating graphs four, rotating graphs five, rotating graphs six, rotating graphs seven, rotating graphs eight, rotating graphs nine, rotation figure Shape ten, rotating graphs 11, rotating graphs 12, rotating graphs 13, rotating graphs 14, rotating graphs 15, rotation figure Shape 16, rotating graphs 17, rotating graphs 18, rotating graphs 19, rotating graphs 20 and rotating graphs 21, rotation Turn figure one, rotating graphs two, rotating graphs three, rotating graphs four, rotating graphs five, rotating graphs six, rotating graphs seven, rotation Turn figure eight, rotating graphs nine, rotating graphs ten, rotating graphs 11, rotating graphs 12, rotating graphs 13, rotation figure Shape 14, rotating graphs 15, rotating graphs 16, rotating graphs 17, rotating graphs 18, rotating graphs 19, rotation Figure 20 and rotating graphs 21 merge and obtain closed figure, by the reduced radius of the circular coverage rate of closed figure to former The 0.55 times of design shape obtaining required metal antenna paster 4 coming and size, obtain gold according to design shape and size cutting Belong to 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 Expect for copper, its bottom surface radius r=0.5mm, thickness d=2.54mm, the connection of cylindrical metal conductor 5 and metal antenna paster 4 The place center of circle is respectively 16.5mm, 16.5mm, 13.5mm and 13.5mm with the vertical dimension of 2 four sides of medium substrate, with cylinder The aperture r=1.9mm of circular hole 6 on the relative earth plate of shape metallic conductor 53, the output of described cylindrical metal conductor 5 other end Interface is connected with energy management circuit, and this energy management circuit is used for being stored the energy absorbing.

Fig. 3 is to collect microstrip antenna using the reduction return loss radio-frequency (RF) energy of hfss antenna modeling simulation software simulation Return loss plot, as seen from the figure, the return loss that this reduction return loss radio-frequency (RF) energy collects microstrip antenna is -31db, than it The return loss of its same volume antenna is also little, and performance is very good.

Fig. 4 is to collect microstrip antenna using the reduction return loss radio-frequency (RF) energy of hfss antenna modeling simulation software simulation to stay Bob figure, as seen from the figure, it is 1.0136 that this reduction return loss radio-frequency (RF) energy collects microstrip antenna in 2.45ghz standing-wave ratio, non- Very close in 1.

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. reduce return loss radio-frequency (RF) energy and collect microstrip antenna it is characterised in that including consistent size and mutual patch from top to bottom Dielectric passivation, medium substrate and the earth plate closing, the medium substrate of side of wherein fitting with dielectric passivation is pasted with gold Belong to antenna patch, the middle part of medium substrate is provided with the cylindrical metal conductor extending vertically through medium substrate, earth plate be provided with The concentric circular hole in cylindrical metal conductor 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 0.1083 λ, wherein λ=122mm, λ is the wavelength of 2.45ghz radio frequency, and thickness is 0.02mm, and material is copper, described medium substrate Material be rogers ro6010, DIELECTRIC CONSTANT ε_r=10.2, thickness d=2.54mm, length and width is 30mm, metal The central point of antenna patch is consistent with the center position of medium substrate upper surface；The design shape of described metal antenna paster and Size meets following requirement, sets up plane right-angle coordinate, by initial point (0mm, 0mm) as starting point, makes one along x-axis positive direction The line segment one of a length of 18mm of bar, line segment one is obtained line segment two with point (18mm, 0mm) for 105 ° as point of rotation rotate counterclockwise, By line segment two with straight lineMake minute surface for axis of symmetry and symmetrically obtain line segment three, the intersection point of line segment two and line segment three isThis point is in straight lineOn, line segment two and line segment three is intersecting Line is in straight lineThe shorter line segment part in both sides is left out respectively, again by initial point (0mm, 0mm) as starting point, along x-axis Positive direction makes the line segment of an a length of 2.5mm, the center of circle being first curve with b (2.5mm, -1.25mm), with a (2.5mm, It is 0mm) end point, with b₁(3.75mm, -1.25mm) is another end points, radius r₁=1.25mm, makes angle of circumference and is 90 °, side To the circular arc for protruding to x-axis and y-axis positive direction, 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 is 180 °, and direction is the circular arc protruding along y-axis negative direction, is the 3rd curve with d (4.6875mm, -1.25mm) The center of circle, 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 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, -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, with f (7.5mm, -1.25mm) is The center of circle of 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, 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) be the 6th curve the center of circle, 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 °, and direction is the circular arc protruding to x-axis and y-axis positive direction, with h (11.875mm ,- 2.5mm) be the 7th curve the center of circle, 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 °, direction is the circular arc protruding to y-axis negative direction, with i (16.25mm, -2.5mm) is the center of circle of the 8th curve, with h₁(13.75mm, -2.5mm) is end point, with i₁(16.25mm, It is 0mm) another end points, radius r₈=2.5mm, makes angle of circumference and is 90 °, and direction is to protrude to x-axis negative direction and y-axis positive direction Circular arc, with i₁(16.25mm, 0mm) is end point, and b (18mm, 0mm) is another end points, makees the line that a length is 1.75mm Section, obtains initial graphics one, by initial graphics one with straight line in x-axis and y-axis planeMake minute surface pair for axis of symmetry Claim to obtain initial graphics two, initial graphics one, initial graphics two, line segment two and line segment three merge and obtain rotating graphs one, will revolve Turn figure one with pointFor the point of rotation, turn clockwise successively 50 °, 100 °, 150°、200°、250°、300°、350°、400°、450°、500°、550°、600°、650°、700°、750°、800°、850°、 900 °, 950 °, 1000 ° and 1050 ° respectively obtain rotating graphs two, rotating graphs three, rotating graphs four, rotating graphs five, rotation Turn figure six, rotating graphs seven, rotating graphs eight, rotating graphs nine, rotating graphs ten, rotating graphs 11, rotating graphs ten 2nd, rotating graphs 13, rotating graphs 14, rotating graphs 15, rotating graphs 16, rotating graphs 17, rotating graphs 18, rotating graphs 19, rotating graphs 20 and rotating graphs 21, rotating graphs one, rotating graphs two, rotating graphs 3rd, rotating graphs four, rotating graphs five, rotating graphs six, rotating graphs seven, rotating graphs eight, rotating graphs nine, rotating graphs Tenth, rotating graphs 11, rotating graphs 12, rotating graphs 13, rotating graphs 14, rotating graphs 15, rotating graphs 16, rotating graphs 17, rotating graphs 18, rotating graphs 19, rotating graphs 20 and rotating graphs 21 merge Obtain closed figure, the reduced radius of the circular coverage rate of closed figure to original 0.55 times are obtained required metal antenna patch The design shape of piece and size, obtain metal antenna paster according to design shape and size cutting；Described cylindrical metal conductor One end be connected with metal antenna paster, the material of cylindrical metal conductor is copper, its bottom surface radius r=0.5mm, thickness d= 2.54mm, cylindrical metal conductor is divided with the vertical dimension of four sides in the junction center of circle and medium substrate of metal antenna paster Not Wei 16.5mm, 16.5mm, 13.5mm and 13.5mm, the aperture r=of circular hole on the earth plate relative with cylindrical metal conductor 1.9mm, the output interface of the described cylindrical metal conductor other end is connected with energy management circuit, and this energy management circuit is used for The energy absorbing is stored.