CN102544738B - Dielectric back-cavity slot coupling micro-strip antenna - Google Patents
Dielectric back-cavity slot coupling micro-strip antenna Download PDFInfo
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- CN102544738B CN102544738B CN201110458308.7A CN201110458308A CN102544738B CN 102544738 B CN102544738 B CN 102544738B CN 201110458308 A CN201110458308 A CN 201110458308A CN 102544738 B CN102544738 B CN 102544738B
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Abstract
The invention belongs to technologies of micro-strip antennas, relating to improvement of a dielectric back-cavity slot coupling micro-strip antenna. The dielectric back-cavity slot coupling micro-strip antenna is characterized in that a back-cavity graph formed by equidistantly arranging metallizing through holes (4) along a straight line is arranged around the circumference of a coupling slot (5), and each metallizing through hole (4) is used for communicating a coupling slot dielectric plate (2) with a feedback dielectric plate (1) and is electrically connected with a copper-cladded foil on the lower surface of the feedback dielectric plate (1). According to the dielectric back-cavity slot coupling micro-strip antenna disclosed by the invention, a metal layer does not need to be plated on the side surface of a dielectric plate, and defects of complex process and poor adhesive force when metal is plated in a large area are overcome; simultaneously, problems of increased loss and reduced antenna efficiency caused by resonance due to backward scattering generated by means of the coupling slot can not be caused.
Description
Technical field
The invention belongs to microwave antenna technology, relate to the improvement to dielectric back-cavity slot coupling micro-strip antenna.
Background technology
Conformal Phased Array radar with its do not affect aircraft aeroperformance, the advantage such as sweep limits is large and RCS is little, be subject to paying close attention to widely.Conformal Phased Array radar requires antenna element to possess the characteristics such as mechanical strength is high, volume is little, and meanwhile, for meeting its requirement to electrical property, antenna needs again to possess wider working band and lower cross polarization.Dielectric back-cavity slot coupling micro-strip antenna, due to the advantage such as have structure, technique is simple, with low cost, and parasitic radiation is little, has obtained certain application on Conformal Phased Array radar.< < broadband dielectric back-cavity slot coupling micro-strip antenna > > (A Wideband Aperture-Coupled Microstrip Patch Antenna with Backed Cavity of Dielectric) (Sun Dan, Dou Wenbin, especially resolve, the 9th antenna, propagate and electromagnetic theory international symposium, 2010) a kind of dielectric back-cavity slot coupling micro-strip antenna is disclosed, this antenna is by feed dielectric plate below, the superimposed splicing of middle coupling gap dielectric-slab and antenna medium plate above forms, feed dielectric plate, coupling gap dielectric-slab and antenna medium plate are measure-alike rectangles, upper surface at feed dielectric plate has feeder line, lower surface at feed dielectric plate has the Copper Foil of covering, upper surface at antenna medium plate has microband paste, upper surface at coupling gap dielectric-slab is coated with Copper Foil, at the middle part of covering Copper Foil, there is coupling gap, at feed dielectric plate, the side of coupling gap dielectric-slab is coated with metal level, form medium back of the body chamber.The shortcoming of this structure is: side surface area is large, and metallising process is complicated, and poor adhesive force.The back scattering that gap produces that likely causes being coupled of this kind of rectangular configuration back of the body chamber causes the unwanted resonance of antenna in the cavity of rule sealing, causes loss to increase, and antenna efficiency declines.
Summary of the invention
The object of the invention is: propose a kind of without the side metal cladding at dielectric-slab, can not cause because of the resonance that the coupling back scattering that produces of gap cause the dielectric back-cavity slot coupling micro-strip antenna of loss increase, decrease in efficiency.
Technical scheme of the present invention is: a kind of dielectric back-cavity slot coupling micro-strip antenna, it consists of feed dielectric plate 1 below, the coupling gap dielectric-slab 2 of centre and the superimposed splicing of antenna medium plate 3 above, feed dielectric plate 1, coupling gap dielectric-slab 2 and antenna medium plate 3 are measure-alike rectangles, upper surface at feed dielectric plate 1 has feeder line, lower surface at feed dielectric plate 1 has the Copper Foil of covering, upper surface at antenna medium plate 3 has microband paste, upper surface at coupling gap dielectric-slab 2 is coated with Copper Foil, has coupling gap 5 at the middle part of covering Copper Foil; It is characterized in that, surrounding in coupling gap 5 has the back of the body chamber figure equidistantly being rearranged by metallization via hole 4, metallization via hole 4 connects coupling gap dielectric-slab 2 and feed dielectric plate 1, and is electrically connected to the Copper Foil formation of covering of feed dielectric plate 1 lower surface, and back of the body chamber figure is one of figure below:
(1) back of the body chamber figure is surrounded by a upper and lower limit and left and right limit, the bottom and upper segment of back of the body chamber figure is parallel straight line, coupling gap 5 is vertical with the bottom and upper segment of back of the body chamber figure, the right of back of the body chamber figure is comprised of 3 sections of upper, middle and lower, upper and lower section of this limit for being parallel to the straight line in the gap 5 that is coupled, the stage casing on this limit is the opening rectangle 6 of an openings at one side, and the opening of this opening rectangle 6 is towards coupling gap 5, and the left side of back of the body chamber figure is the straight line that is parallel to the gap 5 that is coupled;
(2) back of the body chamber figure is surrounded by a upper and lower limit and left and right limit, the bottom and upper segment of back of the body chamber figure is parallel straight line, coupling gap 5 is vertical with the bottom and upper segment of back of the body chamber figure, the left side of back of the body chamber figure is comprised of 3 sections of upper, middle and lower, upper and lower section of this limit for being parallel to the straight line in the gap 5 that is coupled, the stage casing on this limit is the opening rectangle 6 of an openings at one side, and the opening of this opening rectangle 6 is towards coupling gap 5, and the right of back of the body chamber figure is the straight line that is parallel to the gap 5 that is coupled;
(3) back of the body chamber figure is surrounded by a upper and lower limit and left and right limit, the bottom and upper segment of back of the body chamber figure is parallel straight line, coupling gap 5 is vertical with the bottom and upper segment of back of the body chamber figure, the right of back of the body chamber figure and the left side are by 3 sections of upper, middle and lower composition, upper and lower section for being parallel to the straight line in the gap 5 that is coupled, stage casing is the opening rectangle 6 of an openings at one side, and the opening of this opening rectangle 6 is towards coupling gap 5.
2, dielectric back-cavity slot coupling micro-strip antenna according to claim 1, it is characterized in that, width W=7mm～the 15mm on the back of the body upper and lower limit of figure, chamber, length L=9mm～the 16mm on the back of the body left and right limit of figure, chamber, width W 2=4.9mm～the 5.8mm on the upper and lower limit of opening rectangle 6, the opening edge of opening rectangle 6 is to the distance W 1=1.5mm～2.7mm of the upper-lower section on opening rectangle 6 limits, place, distance L 1=2.75mm～the 6mm of the figure top, Dao Bei chamber, top of opening rectangle 6, the distance L 2=3.2mm～4mm between the upper and lower limit of opening rectangle 6.
Advantage of the present invention is: without the side metal cladding at dielectric-slab, and the shortcoming of complex process, poor adhesive force while having overcome large area plating; Meanwhile, can not produce the problem that the resonance causing because of the coupling back scattering that produces of gap causes loss increase, antenna efficiency to decline.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the vertical view of Fig. 1.In figure, omitted antenna medium plate 3.
Embodiment
Below the present invention is described in further details.Referring to Fig. 1 and Fig. 2, a kind of dielectric back-cavity slot coupling micro-strip antenna, it consists of feed dielectric plate 1 below, the coupling gap dielectric-slab 2 of centre and the superimposed splicing of antenna medium plate 3 above, feed dielectric plate 1, coupling gap dielectric-slab 2 and antenna medium plate 3 are measure-alike rectangles, upper surface at feed dielectric plate 1 has feeder line, lower surface at feed dielectric plate 1 has the Copper Foil of covering, upper surface at antenna medium plate 3 has microband paste, upper surface at coupling gap dielectric-slab 2 is coated with Copper Foil, has coupling gap 5 at the middle part of covering Copper Foil; It is characterized in that, surrounding in coupling gap 5 has the back of the body chamber figure equidistantly being rearranged by metallization via hole 4, metallization via hole 4 connects coupling gap dielectric-slab 2 and feed dielectric plate 1, and is electrically connected to the Copper Foil formation of covering of feed dielectric plate 1 lower surface, and back of the body chamber figure is one of figure below:
(1) back of the body chamber figure is surrounded by a upper and lower limit and left and right limit, the bottom and upper segment of back of the body chamber figure is parallel straight line, coupling gap 5 is vertical with the bottom and upper segment of back of the body chamber figure, the right of back of the body chamber figure is comprised of 3 sections of upper, middle and lower, upper and lower section of this limit for being parallel to the straight line in the gap 5 that is coupled, the stage casing on this limit is the opening rectangle 6 of an openings at one side, and the opening of this opening rectangle 6 is towards coupling gap 5, and the left side of back of the body chamber figure is the straight line that is parallel to the gap 5 that is coupled;
(2) back of the body chamber figure is surrounded by a upper and lower limit and left and right limit, the bottom and upper segment of back of the body chamber figure is parallel straight line, coupling gap 5 is vertical with the bottom and upper segment of back of the body chamber figure, the left side of back of the body chamber figure is comprised of 3 sections of upper, middle and lower, upper and lower section of this limit for being parallel to the straight line in the gap 5 that is coupled, the stage casing on this limit is the opening rectangle 6 of an openings at one side, and the opening of this opening rectangle 6 is towards coupling gap 5, and the right of back of the body chamber figure is the straight line that is parallel to the gap 5 that is coupled;
(3) back of the body chamber figure is surrounded by a upper and lower limit and left and right limit, the bottom and upper segment of back of the body chamber figure is parallel straight line, coupling gap 5 is vertical with the bottom and upper segment of back of the body chamber figure, the right of back of the body chamber figure and the left side are by 3 sections of upper, middle and lower composition, upper and lower section for being parallel to the straight line in the gap 5 that is coupled, stage casing is the opening rectangle 6 of an openings at one side, and the opening of this opening rectangle 6 is towards coupling gap 5.
Operation principle of the present invention is: the metallization via hole that covers Copper Foil and run through this two layer medium plate that covers Copper Foil, coupling gap dielectric-slab upper surface by feed dielectric plate lower surface forms a medium back of the body chamber, has effectively reduced the back scattering of slot-coupled microstrip antenna.With respect to the medium cavity-backed radiator antenna passing through at dielectric-slab sidewall metal cladding, this antenna is realized the electrical connection between Copper Foil of covering of covering Copper Foil and coupling gap dielectric-slab upper surface of feed dielectric plate lower surface by metallization via hole, the surface area of each via hole is relatively little, its metallising process is easier to realize, adhesive force is good, and the inefficacy of a small amount of via hole can not cause the essence of carrying on the back cavity configuration to change, and the reliability of antenna is higher.The back of the body cavity shape left side of this antenna or the opening rectangle on the right are the unwanted higher modes producing in closed cavity in order to destroy, and avoid the resonance that appearance is produced in sealing regular cavity by gap back scattering in working band.
Width W=7mm～the 15mm on the back of the body upper and lower limit of figure, chamber, length L=9mm～the 16mm on the back of the body left and right limit of figure, chamber, width W 2=4.9mm～the 5.8mm on the upper and lower limit of opening rectangle 6, the opening edge of opening rectangle 6 is to the distance W 1=1.5mm～2.7mm of the upper-lower section on opening rectangle 6 limits, place, distance L 1=2.75mm～the 6mm of the figure top, Dao Bei chamber, top of opening rectangle 6, the distance L 2=3.2mm～4mm between the upper and lower limit of opening rectangle 6.
Embodiment 1
Only there is an opening rectangle on the left side or the right, and it is straight line by the centrosymmetric another side in gap.Back of the body chamber cross sectional dimensions is W=13mm, L=12mm, W1=2.2mm, W2=5.1mm, L1=4.25mm, L2=3.6mm.Frequency range 8～the 12.3GHz of embodiment 1 antenna element, relative bandwidth is 42.4%, standing-wave ratio <2.
Embodiment 2
The right and left all has opening rectangle.Back of the body chamber cross sectional dimensions is W=11mm, L=13.4mm, W1=2.2mm, W2=5.2mm, L1=5.1mm, L2=3.2mm.Frequency range 8.5～the 11.6GHz of embodiment 2 antenna elements, relative bandwidth is 30.8%, standing-wave ratio <2.
Embodiment 3
The right and left all has opening rectangle.Back of the body chamber cross sectional dimensions is W=7mm, L=9mm, W1=2.7mm, W2=5.8mm, L1=2.75mm, L2=3.5mm.Frequency range 8.6～the 11GHz of embodiment 3 antenna elements, relative bandwidth is 24.5%, standing-wave ratio <2.
Embodiment 4
The right and left all has opening rectangle.Back of the body chamber cross sectional dimensions is W=15mm, L=16mm, W1=1.5mm, W2=4.9mm, L1=6mm, L2=4mm.Frequency range 7.87～the 12.27GHz of embodiment 4 antenna elements, relative bandwidth is 43.7%, standing-wave ratio <2.
Claims (2)
1. a dielectric back-cavity slot coupling micro-strip antenna, it is by feed dielectric plate [1] below, the superimposed splicing of middle coupling gap dielectric-slab [2] and antenna medium plate [3] above forms, feed dielectric plate [1], coupling gap dielectric-slab [2] and antenna medium plate [3] are measure-alike rectangles, upper surface at feed dielectric plate [1] has feeder line, lower surface at feed dielectric plate [1] has the Copper Foil of covering, upper surface at antenna medium plate [3] has microband paste, upper surface at coupling gap dielectric-slab [2] is coated with Copper Foil, at the middle part of covering Copper Foil, there is coupling gap [5], it is characterized in that, surrounding in coupling gap [5] has the back of the body chamber figure equidistantly being rearranged by metallization via hole [4], metallization via hole [4] connects coupling gap dielectric-slab [2] and feed dielectric plate [1], and be electrically connected to the Copper Foil formation of covering of feed dielectric plate [1] lower surface, back of the body chamber figure is one of figure below:
(1) back of the body chamber figure is surrounded by a upper and lower limit and left and right limit, the bottom and upper segment of back of the body chamber figure is parallel straight line, coupling gap [5] is vertical with the bottom and upper segment of back of the body chamber figure, the right of back of the body chamber figure is comprised of 3 sections of upper, middle and lower, upper and lower section of this limit for being parallel to the straight line in coupling gap [5], the stage casing on this limit is the opening rectangle [6] of an openings at one side, the opening of this opening rectangle [6] is towards coupling gap [5], and the left side of back of the body chamber figure is for being parallel to the straight line in coupling gap [5];
(2) back of the body chamber figure is surrounded by a upper and lower limit and left and right limit, the bottom and upper segment of back of the body chamber figure is parallel straight line, coupling gap [5] is vertical with the bottom and upper segment of back of the body chamber figure, the left side of back of the body chamber figure is comprised of 3 sections of upper, middle and lower, upper and lower section of this limit for being parallel to the straight line in coupling gap [5], the stage casing on this limit is the opening rectangle [6] of an openings at one side, the opening of this opening rectangle [6] is towards coupling gap [5], and the right of back of the body chamber figure is for being parallel to the straight line in coupling gap [5];
(3) back of the body chamber figure is surrounded by a upper and lower limit and left and right limit, the bottom and upper segment of back of the body chamber figure is parallel straight line, coupling gap [5] is vertical with the bottom and upper segment of back of the body chamber figure, the right of back of the body chamber figure and the left side are by 3 sections of upper, middle and lower composition, upper and lower section for being parallel to the straight line in coupling gap [5], stage casing is the opening rectangle [6] of an openings at one side, and the opening of this opening rectangle [6] is towards coupling gap [5].
2. dielectric back-cavity slot coupling micro-strip antenna according to claim 1, it is characterized in that, width W=7mm～the 15mm on the back of the body upper and lower limit of figure, chamber, length L=9mm～the 16mm on the back of the body left and right limit of figure, chamber, width W 2=4.9mm～the 5.8mm on the upper and lower limit of opening rectangle [6], the opening edge of opening rectangle [6] is to the distance W 1=1.5mm～2.7mm of the upper-lower section on opening rectangle [6] limit, place, distance L 1=2.75mm～the 6mm of the figure top, Dao Bei chamber, top of opening rectangle [6], the distance L 2=3.2mm～4mm between the upper and lower limit of opening rectangle [6].
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| CN103904423B (en) * | 2012-12-28 | 2016-07-13 | 中国航空工业第六○七研究所 | A kind of low section broadband medium back of the body chamber four radiator antenna unit |
| CN104577349B (en) * | 2015-01-30 | 2017-08-01 | 中天宽带技术有限公司 | High out-of-side rejection cavity filter antenna array |
| CN106887690B (en) * | 2017-04-07 | 2019-01-29 | 西安电子工程研究所 | Broadband low section microstrip antenna based on the excitation of dumb-bell shape slot-coupled |
| CN107978858B (en) * | 2017-11-23 | 2019-12-27 | 重庆邮电大学 | Pattern reconfigurable antenna working in 60GHz frequency band |
| US11108158B2 (en) * | 2018-07-13 | 2021-08-31 | Knowles Cazenovia, Inc. | Millimeter wave filter array |
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|---|---|---|---|---|
| CN102013551A (en) * | 2010-09-15 | 2011-04-13 | 华南理工大学 | Circularly polarized ceramic antenna based on coupling and feeding of strip line via multiple slots |
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| KR20040077052A (en) * | 2003-02-27 | 2004-09-04 | 한국전자통신연구원 | Wideband slot antenna and slot array antenna using the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102013551A (en) * | 2010-09-15 | 2011-04-13 | 华南理工大学 | Circularly polarized ceramic antenna based on coupling and feeding of strip line via multiple slots |
Non-Patent Citations (2)
| Title |
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| 基于波导的微波毫米波空间功率合成技术研究;宋开军;《CNKI博士学位论文全文库》;20070912;图4-10 * |
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