CN109802232A - Fabry-Perot resonant cavity wide band high-gain microstrip antenna based on single-layer double-side coat structure - Google Patents
Fabry-Perot resonant cavity wide band high-gain microstrip antenna based on single-layer double-side coat structure Download PDFInfo
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Abstract
Fabry-Perot resonant cavity wide band high-gain microstrip antenna based on single-layer double-side coat structure, belongs to the wireless communication field of antenna.The present invention includes the metal ground plate of bottom, antenna medium bottom plate, U-type groove aerial radiation patch and the single-layer double-side frequency-selective surfaces on upper layer.Metal ground plate, antenna medium bottom plate and the seamless stacking of U-type groove aerial radiation patch, single-layer double-side frequency-selective surfaces are made of single layer coating medium substrate, the cyclic annular aperture structure of square and cross wire-grid structure.The present invention etches U-lag gap on the metal patch of conventional microstrip antenna, realize the promotion of antenna structure bandwidth, and guarantee the main radiation direction of antenna right above it, meet the design requirement of Fabry-Perot cavity antenna, design has the single-layer double-side frequency-selective surfaces model of positive potential gradient on this basis, increases the gain bandwidth of Fabry-Perot cavity antenna.Present invention design is simple, understands and is easy, and use is wide, portable strong, is suitble to the high-gain and broadband character of Fabry-Perot cavity antenna.
Description
Technical field
The invention belongs to the wireless communication fields of antenna, and in particular to the Fabry- based on single-layer double-side coat structure
Perot resonant cavity wide band high-gain microstrip antenna.
Background technique
The development of wireless communication changes people's lives.Antenna is as the component of reception and transmitting electromagnetic wave by increasingly
Universal attention, and the performance of antenna is particularly critical to the effect of entire wireless communication system.In telecommunication, antenna
Gain needs the sufficiently high terminal that can guarantee system equipment that can work normally.For the research side of the promotion of antenna gain
Have much to design method, Fabry-Perot cavity antenna is in high efficiency, high-gain, structure are simple, low section, without multiple
The concern that miscellaneous feeding network etc. has a clear superiority by researcher.
Fabry-Perot cavity antenna is made of three parts: floor, feed antenna and reflection coating.Feed antenna
The entire resonant cavity of the excitation of electromagnetic wave launched, the radiation field of generation be seen as all from bottom of chamber a bit, feed antenna spoke
The electromagnetic wave of injection between the reflection coating on upper layer and the floor of lower layer by reflection and transmission many times, when two pieces it is parallel
The distance between plate meets condition of resonance, and the electromagnetic wave transmitted realizes in-phase stacking, and is gradually propagated from center to edge；
Meanwhile frequency-selective surfaces change the distribution form that antenna aperture is entered the court, and make being uniformly distributed for bore inside field distribution, promote day
The gain of line.
Multiple reflections and transmission of the electromagnetic wave of intra resonant cavity by multiple reflections coating, can be in reflection coating outer surface
Upper realization in-phase stacking sharpens beam angle while forming high-gain radiation.In order to improve Fabry-Perot resonant cavity
While antenna gain, gain bandwidth is improved, the present invention is based on the single-layer double-side frequency-selective surfaces with positive potential gradient
Coat structure proposes a kind of design of the Fabry-Perot cavity antenna of novel coating wide-band high gain.
Summary of the invention
It is an object of the invention to overcome the problems, such as that the gain bandwidth of existing Fabry-Perot cavity antenna is relatively narrow,
A kind of single-layer double-side frequency-selective surfaces with positive potential gradient are provided, are designed with this structure based on single-layer double-side coating knot
The Fabry-Perot resonant cavity wide band high-gain microstrip antenna of structure.
The object of the present invention is achieved like this:
Fabry-Perot resonant cavity wide band high-gain microstrip antenna based on single-layer double-side coat structure, including bottom day
4 structure of line and single-layer double-side frequency-selective surfaces, bottom antenna is uniaxial feed U-type groove microband paste feed antenna, by bottom
Metal ground plate 1, antenna medium bottom plate 2, U-type groove aerial radiation patch 3 stacking place collectively form, as Fabry-
The lower reflecting plate of Perot cavity antenna；Resonant cavity upper layer is the single-layer double-side frequency for the periodic arrangement for having positive potential gradient
The array for selecting surface 4 to form, 4 structure of single-layer double-side frequency-selective surfaces is as upper reflecting surface, by single layer coating medium substrate
5, the cross wire-grid structure 7 of the cyclic annular aperture structure 6 of the square on upper layer and lower layer collectively constitutes, wherein square ring aperture knot
Structure 6 is made of metal resonance side ring 8 and square metal patch 9, the array that the single-layer double-side frequency-selective surfaces 4 form with
U-lag microband paste feed antenna face；It is filled inside Fabry-Perot cavity antenna by air, section height is
13.5mm。
The periodicity of the single-layer double-side frequency-selective surfaces 4 of the upper reflecting surface is 6 × 6, square ring-type aperture structure 6
Side length be 10.5mm, the width of metal resonance side ring 8 is 1.5mm, and the side length of square metal patch 9 is 8mm, cross aperture plate knot
7 width of structure is 3mm, length 10.5mm；Single layer coating medium substrate 5 with a thickness of 1.5mm, material selection is Rogers
RT/duroid 5880。
The uniaxial feed U-type groove microband paste feed antenna of bottom, centre frequency f=10GHz, wherein metal ground plate
1 with a thickness of 1.6mm, and the selection of material is Arlon AD255A, dielectric constant 2.2, and 3 length of U-type groove aerial radiation patch is
13.2mm, width 8.2mm, U-lag gap is etched on the U-lag aerial radiation patch 3 of lower layer, and narrow portion gap width is
0.15mm, length 7.6mm, wideband portions gap width are 1.3mm, length 7.3mm.
Fabry-Perot resonant cavity height is 16.6mm, including air chamber height 13.5mm, U-type groove microband paste feed
The 4 thickness 1.6mm of thickness 1.5mm and single-layer double-side frequency-selective surfaces of antenna.
The beneficial effects of the present invention are:
(1) antenna structure of lower layer of the present invention belongs to U-lag microstrip antenna, reflection coefficient with wide, gain
Also than the high gain of the microstrip antenna of original slotless；
(2) single-layer double-side frequency-selective surfaces structure is simple, and change in size is easily controlled corresponding reflection coefficient
Amplitude and phase；Single-layer double-side frequency-selective surfaces are in the working frequency range of antenna with the reflected phase of positive potential gradient, energy
Enough guarantee that the width of the impedance bandwidth of antenna is promoted；The amplitude of the reflection coefficient of single-layer double-side frequency-selective surfaces is high, further
Improve the gain of Fabry-Perot antenna.
Detailed description of the invention
Fig. 1 is the structure chart of U-type groove antenna；
Fig. 2 is the impedance bandwidth and gain effect figure of U-type groove antenna；
Fig. 3 is for U-type groove antenna in the gain effect figure in the face xoz and the face yoz at centre frequency 10GHz；
Fig. 4 is the structure chart of single-layer double-side frequency-selective surfaces；
Fig. 5 is the reflected amplitudes and reflected phase figure of single-layer double-side frequency-selective surfaces；
Fig. 6 is the structure chart based on single-layer double-side coat structure Fabry-Perot resonant cavity wide band high-gain microstrip antenna；
Fig. 7 is the impedance band based on single-layer double-side coat structure Fabry-Perot resonant cavity wide band high-gain microstrip antenna
Wide and gain diagram；
Fig. 8 is based on single-layer double-side coat structure Fabry-Perot resonant cavity wide band high-gain microstrip antenna portions frequency point
Gain effect figure.
Specific embodiment
The present invention is described in further details with reference to the accompanying drawing.
Such as Fig. 1, shown in 4,6, U-lag microstrip antenna includes the metal ground plate 1 of bottom, antenna medium bottom plate 2, U-type groove
The stacking of aerial radiation patch 3, which is placed, to be collectively formed.Resonant cavity upper layer is the array that single-layer double-side frequency-selective surfaces 4 form, single
Layer dual-sided frequency selection surface 4 is by single layer coating medium substrate 5, the cross of square the ring-type aperture structure 6 and lower layer on upper layer
Wire-grid structure 7 collectively constitutes, wherein square ring-type aperture structure 6 is by metal resonance side ring 8 and 9 groups of square metal patch
At.U-lag gap is etched on the U-lag aerial radiation patch of the lower layer, realizes the promotion of the bandwidth of antenna structure, and protect
The main radiation direction of antenna is demonstrate,proved right above it, to meet the design requirement of Fabry-Perot cavity antenna.The single layer is double
The array and U-lag microband paste feed antenna face that face frequency-selective surfaces 4 form, the side length of the medium substrate of the two are
71mm.It is filled inside Fabry-Perot cavity antenna by air, section height 13.5mm.
It is improved the present invention is based on traditional frequency-selective surfaces and designs novel single-layer double-side frequency-selective surfaces 4
Coat structure model.Single-layer double-side frequency-selective surfaces 4 include one layer of medium substrate 5 and bilevel metal etch table
Face, this model have positive reflection phase gradient characteristic, can increase the gain bandwidth of Fabry-Perot cavity antenna.Single layer
Dual-sided frequency selects surface that periodic arrangement is presented, and the variation of size can control the surface width of single-layer double-side frequency-selective surfaces
Value and phase, and then control the section height and gain effect of Fabry-Perot resonant cavity.
The present invention passes through the surface of the U-lag antenna of the lower surface of the Fabry-Perot cavity antenna is high
It spends at 13.5mm and the coat structure of single-layer double-side frequency-selective surfaces is added, at resonant frequency point, due to single-layer double-side frequency
It selects the reflected amplitudes of the coat structure on surface higher, realizes the high-gain of Fabry-Perot cavity antenna；Such as Fig. 2,3,
Shown in 5,7,8, the reflected phases of single-layer double-side frequency-selective surfaces 4 at frequency range 9.4-10.7GHz, FSS unit
Reflected phase slope is positive number, meets the wide gain bandwidth requirement of Fabry-Perot resonant cavity；Reflection coefficient at 10GHz
About 0.865, meet the high gain requirements of Fabry-Perot resonant cavity.The frequency range of the impedance bandwidth of U-lag microstrip antenna
It is 9.5-10.71GHz, absolute bandwidth 1.21GHz, relative bandwidth 12%, -3dB gain bandwidth is 24.92%, and highest increases
Beneficial 8.12dB.The Fabry-Perot resonant cavity wide band high-gain based on single-layer double-side coat structure is obtained after establishing resonant cavity
Microstrip antenna, gain have obtained significantly being promoted, and the gain relative bandwidth of highest-gain 11.82dB, corresponding -3dB are
22.08%.The gain for meeting antenna and 3dB gain bandwidth are at inverse correlation relationship, i.e. the yield value of cavity antenna and gain
Bandwidth belongs to the relationship mutually restricted, meets basic theories.
The structure for the single-layer double-side frequency-selective surfaces 4 that the present invention uses can be changed according to the actual situation, while U-shaped
The type of slot microstrip antenna can also change other kinds of antenna, used medium in entire Fabry-Perot resonant cavity into
As long as substrate meets small electromagnetic consumable, relative dielectric constant and thickness and meets basic condition of resonance.
Field according to the present invention is readily appreciated that and applies, and this can be improved and be applied to other field.
Claims (4)
1. the Fabry-Perot resonant cavity wide band high-gain microstrip antenna based on single-layer double-side coat structure, it is characterised in that: packet
Bottom antenna and single-layer double-side frequency-selective surfaces (4) structure are included, bottom antenna is uniaxial feed U-type groove microband paste feed day
Line places common structure by metal ground plate (1), antenna medium bottom plate (2), U-type groove aerial radiation patch (3) stacking of bottom
At lower reflecting plate as Fabry-Perot cavity antenna；Resonant cavity upper layer is the periodic arrangement for having positive potential gradient
The array of single-layer double-side frequency-selective surfaces (4) composition, single-layer double-side frequency-selective surfaces (4) structure as upper reflecting surface, by
Single layer coating medium substrate (5), upper layer square cyclic annular aperture structure (6) and lower layer common group of cross wire-grid structure (7)
At, wherein square ring-type aperture structure (6) is made of metal resonance Fang Huan (8) and square metal patch (9), the single layer
Dual-sided frequency selects the array and U-lag microband paste feed antenna face of surface (4) composition；Fabry-Perot resonant cavity day
It is filled inside line by air, section height 13.5mm.
2. the Fabry-Perot resonant cavity wide band high-gain according to claim 1 based on single-layer double-side coat structure is micro-
Band antenna, it is characterised in that: the periodicity of the single-layer double-side frequency-selective surfaces (4) of the upper reflecting surface is 6 × 6, square
The side length of ring aperture structure (6) is 10.5mm, and the width of metal resonance Fang Huan (8) is 1.5mm, square metal patch (9)
Side length is 8mm, and cross wire-grid structure (7) width is 3mm, length 10.5mm；Single layer coating medium substrate (5) with a thickness of
1.5mm, material selection is Rogers RT/duroid 5880.
3. the Fabry-Perot resonant cavity wide band high-gain according to claim 1 based on single-layer double-side coat structure is micro-
Band antenna, it is characterised in that: the uniaxial feed U-type groove microband paste feed antenna of bottom, centre frequency f=10GHz, wherein
For metal ground plate (1) with a thickness of 1.6mm, the selection of material is Arlon AD255A, dielectric constant 2.2, U-type groove aerial radiation
Patch (3) length is 13.2mm, width 8.2mm, and U-lag gap is etched on the U-lag aerial radiation patch (3) of lower layer, narrow
Band part gap width is 0.15mm, and length 7.6mm, wideband portions gap width is 1.3mm, length 7.3mm.
4. the Fabry-Perot resonant cavity wide band high-gain according to claim 1 based on single-layer double-side coat structure is micro-
Band antenna, it is characterised in that: Fabry-Perot resonant cavity height is 16.6mm, including air chamber height 13.5mm, U-type groove be micro-
Thickness 1.5mm with patch feed antenna and single-layer double-side frequency-selective surfaces (4) thickness 1.6mm.
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| CN201910194837.7A CN109802232A (en) | 2019-03-14 | 2019-03-14 | Fabry-Perot resonant cavity wide band high-gain microstrip antenna based on single-layer double-side coat structure |
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| CN201910194837.7A CN109802232A (en) | 2019-03-14 | 2019-03-14 | Fabry-Perot resonant cavity wide band high-gain microstrip antenna based on single-layer double-side coat structure |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110534921A (en) * | 2019-09-11 | 2019-12-03 | 西安电子科技大学 | The antenna for base station that has a down dip is adjusted based on the electricity for reflecting super surface and partially reflecting surface |
| CN110808461A (en) * | 2019-11-22 | 2020-02-18 | 东南大学 | Low-profile holographic imaging antenna based on Fabry-Perot resonant cavity type structure |
| CN110854534A (en) * | 2019-11-27 | 2020-02-28 | 南京邮电大学 | Decoupled Fabry-Perot resonator |
| CN111755809A (en) * | 2020-07-30 | 2020-10-09 | 上海无线电设备研究所 | Miniaturized dual-polarized broadband Fabry-Perot resonant cavity antenna |
| CN112103629A (en) * | 2020-09-16 | 2020-12-18 | 重庆大学 | Fabry-Perot resonant cavity antenna applied to wireless power transmission |
| CN113394569A (en) * | 2021-06-30 | 2021-09-14 | 电子科技大学长三角研究院(湖州) | Low-profile dual-band wave-absorbing surface applied to vehicle-mounted radar test environment and manufacturing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110534921A (en) * | 2019-09-11 | 2019-12-03 | 西安电子科技大学 | The antenna for base station that has a down dip is adjusted based on the electricity for reflecting super surface and partially reflecting surface |
| CN110534921B (en) * | 2019-09-11 | 2021-06-25 | 西安电子科技大学 | Electrically-adjusted downtilt base station antenna based on reflection super surface and partial reflection surface |
| CN110808461A (en) * | 2019-11-22 | 2020-02-18 | 东南大学 | Low-profile holographic imaging antenna based on Fabry-Perot resonant cavity type structure |
| CN110854534A (en) * | 2019-11-27 | 2020-02-28 | 南京邮电大学 | Decoupled Fabry-Perot resonator |
| CN111755809A (en) * | 2020-07-30 | 2020-10-09 | 上海无线电设备研究所 | Miniaturized dual-polarized broadband Fabry-Perot resonant cavity antenna |
| CN112103629A (en) * | 2020-09-16 | 2020-12-18 | 重庆大学 | Fabry-Perot resonant cavity antenna applied to wireless power transmission |
| CN113394569A (en) * | 2021-06-30 | 2021-09-14 | 电子科技大学长三角研究院(湖州) | Low-profile dual-band wave-absorbing surface applied to vehicle-mounted radar test environment and manufacturing method thereof |
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