CN114639960B - Reconfigurable Fabry-Perot resonant cavity antenna - Google Patents
Reconfigurable Fabry-Perot resonant cavity antenna Download PDFInfo
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- CN114639960B CN114639960B CN202210224347.9A CN202210224347A CN114639960B CN 114639960 B CN114639960 B CN 114639960B CN 202210224347 A CN202210224347 A CN 202210224347A CN 114639960 B CN114639960 B CN 114639960B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
- H01Q9/0414—Substantially flat resonant element parallel to ground plane, e.g. patch antenna in a stacked or folded configuration
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
- H01Q15/0013—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective
- H01Q15/002—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective said selective devices being reconfigurable or tunable, e.g. using switches or diodes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
- H01Q25/002—Antennas or antenna systems providing at least two radiating patterns providing at least two patterns of different beamwidth; Variable beamwidth antennas
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a directional diagram reconfigurable Fabry-Perot resonant cavity antenna loaded with an AFSS (active matrix substrate). The resonant cavity antenna consists of an upper layer plate and a lower layer plate, wherein the upper surface of the lower layer plate is stuck with a patch antenna with a square structure, the lower surface is a metal floor, the upper layer plate comprises a layer of AFSS as a reconfigurable PRS (super-fine particle swarm optimization), and the upper surface of the AFSS is loaded with a strip-shaped metal structure and is linked by a PIN tube in the middle of the strip-shaped metal structure so as to change the transmission characteristics of different areas of the AFSS. The invention adopts the patch antenna and the AFSS loading structure, and effectively solves the design difficulty of the reconfigurable pattern of the traditional resonant cavity antenna by the superposition principle of beams in different areas of the AFSS.
Description
Technical Field
The invention belongs to the technical field of electromagnetic fields and microwaves, and particularly relates to an AFSS-loaded directional diagram reconfigurable Fabry-Perot resonant cavity antenna.
Background
The Fabry-Perot resonant cavity antenna is generally of an upper layer and a lower layer of parallel structures, a feed source antenna is placed on the upper surface of a lower layer of dielectric plate, a metal floor is arranged on the lower surface of the lower layer of dielectric plate, a partial reflection layer (Partially Reflective Surface, PRS) is arranged on the upper layer of dielectric plate, the upper layer of dielectric plate and the lower layer of dielectric plate form a Fabry-Perot resonant cavity structure, and the structure can improve the antenna gain without a complex feed network. When the cavity reaches a certain resonance condition, the electromagnetic waves emitted by the lower surface radiator can be overlapped in phase after being transmitted through the upper PRS structure, so that the gain of the antenna is improved and the beam width of the antenna is sharpened. But the bandwidth of conventional Fabry-Perot resonant cavity antennas is generally low and the number of reconfigurable patterns implemented is small.
With the continuous development of reconfigurable technology, the function of simultaneous amplitude switching and phase switching can be realized in one AFSS unit, and the purpose of design of the directional diagram reconfigurable Fabry-Perot resonant cavity antenna can be achieved by loading the reconfigurable AFSS. Considering that the current electromagnetic environment is increasingly complex, the research pattern reconfigurable Fabry-Perot resonant cavity antenna has important theoretical and engineering significance.
Disclosure of Invention
The invention aims to provide a reconfigurable Fabry-Perot resonant cavity antenna, which can effectively solve the current situation that the radiation pattern of the traditional Fabry-Perot resonant cavity antenna is single.
In order to achieve the above purpose, the invention provides an AFSS loaded pattern reconfigurable Fabry-Perot resonant cavity antenna, which is characterized in that the resonant cavity antenna is composed of an upper layer plate and a lower layer plate, the upper surface of the lower layer plate is stuck with a rectangular patch antenna, and the lower surface is a metal floor; the upper layer plate comprises an AFSS as a reconfigurable PRS, and a PIN tube link is used in the middle of a strip-shaped metal structure loaded on the upper surface of the AFSS to change the transmission characteristics of different areas of the AFSS. The working frequency point of the patch antenna is 7.5GHz, and the working frequency band is 7.4 GHz-7.6 GHz.
The AFSS-loaded directional diagram reconfigurable Fabry-Perot resonant cavity antenna adopts a mode of encoding the AFSS, breaks through the single radiation directional diagram of the traditional antenna, realizes the free switching of 36 antenna beams, and comprises the following steps: the free switching of the beams with different HPBW and different inclination angles.
The antenna with the AFSS loaded directional diagram reconfigurable Fabry-Perot resonant cavity adopts a single-layer AFSS as a PRS unit structure, and the work of the antenna is realized through a design method for regulating and controlling transmission characteristics of different areas of the resonant cavity.
Compared with the prior art, the invention has the beneficial effects that:
1. the reconfigurable antenna is in a form of 2-system digital coding, and compared with a common resonant cavity antenna, the continuous regulation and control of narrow HPBW and wide HPBW beams are realized, and the design work of 36 beams is completed.
2. The single-layer AFSS is adopted as a unit structure of the PRS, and the antenna works through a design method for regulating and controlling transmission characteristics of different areas of the resonant cavity.
Drawings
FIG. 1 is a structural side view of an AFSS loaded pattern reconfigurable Fabry-Perot resonant cavity antenna;
FIG. 2 is a schematic diagram of the AFSS unit structure in the upper plate of the AFSS-loaded pattern reconfigurable Fabry-Perot antenna;
fig. 3 is a schematic diagram of a resonant cavity antenna;
FIG. 4 is a pictorial representation of a process object of AFSS loaded pattern reconfigurable Fabry-Perot cavity antennas;
fig. 5 (a) - (f) are graphs of simulation results of AFSS loaded pattern reconfigurable Fabry-Perot resonator antennas.
Reference numerals: the antenna comprises a 1-dielectric substrate, a 2-PIN tube, a 3-metal strip, a 4-driven patch antenna, a 5-metal ground and a 6-nylon supporting hole.
Detailed Description
The present invention will be further described in detail with reference to the drawings and examples, in order to more clearly clarify the objects, technical solutions and advantages of the present invention. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
As shown in fig. 1 to 2, the AFSS-loaded pattern reconfigurable Fabry-Perot resonant cavity antenna according to the embodiment of the present invention includes 2 dielectric plates, a patch antenna with a square structure is attached to the upper surface of the lower plate, the lower surface is a metal floor, and the upper plate includes an AFSS layer as a reconfigurable PRS. As shown in fig. 2, PIN-tube linking is used in the middle of the AFSS upper surface loading bar metal structure to change the transmission characteristics of different areas of the AFSS. The two diodes are packaged in an SC-79 of the SMP1320 series and placed in the AFSS by soldering. Wherein the parameters are as follows:
p＝12mm,h＝1mm,H＝17.5mm,a＝8mm,M＝120mm,b＝12.5mm,l1＝1.2mm,l2＝1.6mm,w＝0.5mm。
namely, the period of the AFSS unit is 12mm, the thickness of the upper dielectric plate and the lower dielectric plate is 1mm, the height of the air cavity is 17.5mm, the length of the patch antenna of the lower layer plate is 12.5mm, the width of the patch antenna of the lower layer plate is 8mm, the distance between PIN tubes in the AFSS unit is 1.6mm, 1.2mm is reserved in the middle of an AFSS strip for welding the PIN tubes, and finally the size of the whole antenna is 120mm multiplied by 120mm.
The AFSS-loaded directional diagram of the embodiment of the invention can reconstruct the FSS array of the upper layer plate of the Fabry-Perot resonant cavity antenna, which is arranged in a 9 multiplied by 9 period. The working frequency point of the patch antenna is 7.5GHz, and the working frequency band is 7.4 GHz-7.6 GHz. The directional diagram can reconstruct Fabry-Perot resonant cavity antenna has good working state, the gain of the patch antenna is improved at 7.4 GHz-7.6 GHz frequency points, 36 kinds of reconfigurable antenna radiation directional diagrams can be generated by changing the encoding state of the AFSS, and the gain of the patch antenna is greatly improved by 7.2dB especially in 00000 state. The reconfigurable Fabry-Perot resonant cavity antenna of the directional diagram can realize the gain change range in the working frequency band as follows: 9.14dBi-14.1dBi; the range of variation of HPBW in the XOZ plane is 32.8-92 degrees; the range of variation of the YOZ in-plane HPBW covers 30.5 DEG to 75.3 deg. The design difficulty of the conventional antenna pattern reconstruction is overcome. The total height of the structure is 18.5mm, wherein the height of an air cavity between the patch antenna and the AFSS is 16.5mm, the thickness of a patch antenna dielectric substrate is 1mm, and the thickness of a dielectric plate of the AFSS is 1mm. Compared with the common reconfigurable resonant cavity antenna, the reconfigurable resonant cavity antenna has the characteristics of simple structure and large number of switchable directional patterns, and has important value in the research and development of the reconfigurable F-P resonant cavity antenna.
The invention adopts the patch antenna and the AFSS loading structure, and effectively solves the design difficulty of the reconfigurable pattern of the traditional resonant cavity antenna by the superposition principle of beams in different areas of the AFSS.
With reference to fig. 3, the principle of the technical effect achieved by this structure is as follows: for the AFSS, since the high transmission characteristic and the partial transmission characteristic can be obtained by changing the on and off states of the PIN tube, respectively, when the AFSS is in the high transmission characteristic, the antenna can radiate the beam (low gain, wide HPBW) of the patch antenna at this time, and the state AFSS functions as a radome; when the AFSS is in the partial transmission and partial reflection characteristics, the designed antenna can radiate an F-P antenna beam (high-gain pen-shaped beam), and the AFSS is used as the PRS of the F-P resonant cavity antenna; the rest states are intermediate states of the two limit states, and the effect is approximately between the two limit states.
According to the working frequency band of the Fabry-Perot resonant cavity antenna, the material of the dielectric substrate can be Rogers RT5880, FR4 and the like, and the metal structural material can be metal with good conductivity and stable property, such as copper, gold, aluminum and the like.
In this embodiment, the AFSS loaded pattern reconfigurable Fabry-Perot cavity antenna operates at centimeter wavesThe lower layer medium substrate adopts an F4BM220 high-frequency microwave plate with the thickness of 1mm, a patch antenna with corresponding size is manufactured on the upper surface of the medium substrate by adopting a standard PCB processing technology, and a metal floor is attached to the lower surface; the upper layer AFSS dielectric plate adopts F4BM220 high frequency microwave plate with thickness of 1mm, adopts standard PCB processing technology to manufacture 9X 9 metal periodic array on the dielectric substrate, and has total size of 120X 120mm 2 The thickness of the metal structure is 20 μm copper.
Performing inter-phase encoding on the AFSS, and referring to a schematic diagram of an antenna structure, wherein the inter-phase encoding method specifically comprises the following steps: for 9 AFSS strips designed in the upper layer plate, the single AFSS strip is encoded with the conduction characteristic (1 conduction and 0 cutoff) and can be added to 2 9 For realizing control of the antenna radiation beam HPBW and beam tilt, respectively, here, symmetric (2 total of left and right AFSS stripe coding modes are symmetric with fifth-column AFSS stripe as symmetry axis 5 32) and asymmetric (111110000, etc.) codes to respectively regulate the tilt functions of HPBW and beam, so as to realize the design work of the pattern reconfigurable Fabry-Perot resonant cavity antenna.
Fig. 4 shows a processed and fabricated physical diagram of an AFSS loaded pattern reconfigurable Fabry-Perot resonator antenna.
Fig. 5 shows the results of a simulation of the dependence of the AFSS loaded pattern reconfigurable Fabry-Perot resonator antenna. FIGS. 5 (a) - (b) are S of different HPBW pattern reconfigurable antennas, respectively 11 S of directional diagram reconfigurable antenna under different beam scanning states 11 Fig. 5 (a) - (b) show impedance bandwidth characteristics of the reconfigurable antenna in HPBW and beam tilt states, and the results show that the above antenna can operate normally in the designed state; fig. 5 (c) is a frequency-gain diagram of the reconfigurable antenna, and the actual measurement result shows that the working characteristics of the antenna are good; fig. 5 (d) is a diagram of a reconfigurable antenna in different beam scanning states, fig. 5 (e) and (f) are diagrams of a reconfigurable antenna in different HPBW, and fig. 5 (d) to (f) illustrate partially reconfigurable states of the reconfigurable antenna in different states of the HPBW.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the invention thereto. It should be noted that: any modification and variation made within the spirit and principles of the present invention should be considered as falling within the scope of the present invention.
Claims (2)
1. The reconfigurable Fabry-Perot resonant cavity antenna is characterized in that the resonant cavity antenna is of an upper layer plate structure and a lower layer plate structure, a rectangular patch antenna is attached to the upper surface of the lower layer plate, and a metal floor is arranged on the lower surface of the lower layer plate; the upper layer plate is provided with a layer of AFSS as a reconfigurable PRS, the upper surface of the AFSS is provided with metal strips at equal intervals, PIN tubes are arranged on the metal strips at equal intervals to change the transmission characteristics of different areas of the AFSS, and the method for inter-phase encoding of the AFSS is specifically as follows: for n AFSS strips designed in the upper layer plate, the single AFSS strip is encoded with the conduction characteristic of the single AFSS strip, the conduction is 1, the cutoff is 0, and the total of 2 can be realized n Seed coding; in order to realize the control of the radiation beam HPBW and the beam inclination of the antenna respectively, the AFSS strip at the middle position is taken as a symmetry axis, and the inclination functions of the HPBW and the beam are regulated and controlled respectively by adopting a symmetrical coding mode and an asymmetrical coding mode, so as to realize the design of the pattern reconfigurable Fabry-Perot resonant cavity antenna.
2. The reconfigurable Fabry-Perot resonator antenna of claim 1, wherein the PIN tube is a double PIN tube using an AFSS, and two diodes are soldered in the AFSS to achieve a Fabry-Perot resonator antenna pattern reconfigurability.
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| CN202210224347.9A CN114639960B (en) | 2022-03-09 | 2022-03-09 | Reconfigurable Fabry-Perot resonant cavity antenna |
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| CN114639960B true CN114639960B (en) | 2023-06-23 |
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| CN111342216A (en) * | 2020-03-11 | 2020-06-26 | 中天宽带技术有限公司 | Beam width reconfigurable antenna |
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| CN108155467A (en) * | 2017-11-27 | 2018-06-12 | 中国传媒大学 | A kind of mimo antenna based on F-P cavity |
| CN108321546A (en) * | 2018-01-18 | 2018-07-24 | 南京航空航天大学 | A kind of improved multifunctional active frequencies selection surface and its control method |
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| JP2012054793A (en) * | 2010-09-01 | 2012-03-15 | Softbank Mobile Corp | Antenna system |
| 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 |
| CN111342216A (en) * | 2020-03-11 | 2020-06-26 | 中天宽带技术有限公司 | Beam width reconfigurable antenna |
Non-Patent Citations (1)
| Title |
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| 宽带法布里-珀罗谐振腔天线;冀璐阳;傅光;张志亚;龚书喜;;西安电子科技大学学报(第01期);全文 * |
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