CN113612005A - 4-element GPS anti-interference antenna array loaded with director and mobile communication system - Google Patents
4-element GPS anti-interference antenna array loaded with director and mobile communication system Download PDFInfo
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- H—ELECTRICITY
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- H01Q1/002—Protection against seismic waves, thermal radiation or other disturbances, e.g. nuclear explosion; Arrangements for improving the power handling capability of an antenna
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- H—ELECTRICITY
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- H—ELECTRICITY
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- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
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- H—ELECTRICITY
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
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Abstract
The invention belongs to the technical field of microwave antennas, and discloses a 4-element GPS anti-interference antenna array and a mobile communication system of a loading director, wherein the 4-element GPS anti-interference antenna array of the loading director is provided with: the antenna comprises an antenna cavity, wherein a microstrip antenna array is arranged on the antenna cavity, and antenna units are tightly fixed by screws with the diameter of 2.5 mm. The 4-element GPS anti-interference antenna array loaded with the director provided by the invention has a simple and compact structure, and can solve the problem that the miniaturization and high performance of the existing GPS anti-interference antenna are difficult to combine from the design of the antenna unit array and the director, so that the invention can be widely applied to a GPS anti-interference antenna system needing miniaturization. The director designed by the invention improves the gain of the corresponding frequency band antenna under the condition of not causing great influence on other frequency band antennas, improves the axial ratio of the corresponding antenna, has compact structure and easy installation, and ensures the overall performance of the 4-element GPS anti-interference antenna.
Description
Technical Field
The invention belongs to the technical field of microwave antennas, and particularly relates to a 4-element GPS anti-interference antenna array and a mobile communication system loaded with a director.
Background
Since 1994, deployment of a GPS anti-interference system is completed, and through continuous development, currently, the GPS system plays a very important role in military and civil use, irreplaceable roles are played in various aspects such as surveying and mapping, navigation and the like, the performance of the GPS anti-interference antenna directly affects the whole system, at present, a microstrip antenna is widely applied to the GPS anti-interference antenna system due to the advantages of low profile, simple structure, easiness in miniaturization and the like, but with the development of the antenna system, further challenges are provided for antenna design. With the requirement of a modern GPS anti-interference system, a plurality of frequency band antennas are often placed in a very limited space, when the same frequency band antenna array is placed, when one antenna unit is excited, energy traction is generated due to the same electrical length, so that the antenna gain is reduced, and the like. The design research has a section and has contained 6 frequency channels, totally 13 antenna unit's GPS anti-interference antenna 4 element array, this antenna array is placed inside the cavity that the radius is only 115mm according to corresponding demand, consequently make miniaturized design to every antenna unit, adopted the high dielectric constant dielectric plate, but antenna unit gain has been reduced, according to GPS anti-interference demand, the antenna of a plurality of same frequency channels is placed to the cavity outermost periphery, but when some one of them unit antenna of excitation, the energy can have the part to draw and place on other same frequency channel antennas outermost periphery, further reduce unit gain, great influence has been caused to antenna system performance. Aiming at the problem, a 'yersinia scattering cold' -shaped director is designed and placed at the height of 15mm above the cavity, so that the gains of B3 and B2B frequency band antennas are obviously improved under the condition of not generating large influence on S, L, B1 and R1 frequency band antennas, and the axial ratio performance of B3 and B2B antennas is improved. The 4-element anti-interference antenna array loaded with the director solves the problem that the corresponding antenna of the GPS anti-interference antenna array has low gain, optimizes the axial ratio performance of the corresponding antenna, has simple structure and easy installation, and is widely suitable for the GPS anti-interference antenna array with low gain.
The prior art is as follows: in 2007, document 1[ y, Zhou, c, Chen and j.l. Volakis, "Dual Band Proximity-Fed buffered Antenna for Tri-Band GPS Applications," in IEEE Transactions on Antennas and Propagation, vol.55, No. 1, pp. 220-.
In 2016, "Analysis and Design of a Low-Cost Dual-Band Compact Polarized Antenna for GPS Application," in IEEE Transactions on Antennas and Propagation, vol.64, No. 1, pp. 365-.]A miniaturized microstrip antenna loaded with a double-coupling short-circuit probe covers L1 and L2 frequency bands in a GPS (global positioning system), and the total size of the antenna is reduced to lambda by using a loaded short-circuit metallized via hole technology0×λ0×λ0The dielectric plate adopts F4b with low cost, the standing wave in two frequency bands is lower than 1.5, the gain is higher than 4dBi, the antenna unit has the advantages of wide band, miniaturization and higher gain, but the antenna structure is more complex,the processing difficulty is large.
In 2014, patent 1[ Shenzhen Huaxin antenna technology Limited, anti-jamming antenna: CN201420378406.9[ P ]. 2014-12-24 ] proposes a GPS antenna structure and a GPS antenna wireless communication device, wherein the GPS antenna structure comprises an antenna array element and a chassis for fixing the antenna array element, an antenna unit has the advantage of high isolation, but the structure does not place antennas in multiple frequency bands, and the size of the unit is relatively large.
In 2015, patent 2[ Shenzhen Futai Macro precision industries, Inc., Midami communications Limited, CN201310712342.1[ P ]. 2015-06-24 ] proposes a GPS antenna structure and a GPS antenna infinite communication device, wherein the GPS antenna structure comprises a flexible circuit board, a director, a reflector, an active oscillator and other fixed structures, and the GPS antenna is in the form of an yagi antenna, so that the GPS antenna has the advantages of high directivity and high gain, but the antenna structure is too large in size and cannot emit circularly polarized waves.
In 2016, a small seven-array element self-adaptive anti-interference antenna is proposed by patent 3[ Peking aerospace Long-standing aircraft research institute, China launch vehicle technology research institute ], CN201610879696.9[ P ]. 2017-02-22 ], the antenna adopts a plate with the dielectric constant of 10.2 to miniaturize the antenna, 6 auxiliary antennas are arranged around a main antenna at equal angles, and the antenna, a low-noise amplifier and a filter are integrated into a whole, so that the antenna has the advantages of small volume, light weight, low power consumption and strong anti-interference capability, but the frequency band covered by the array elements is less, and the performance is single.
In 2017, patent 4[ Shenzhen Shenshu limited anti-interference array integrated antenna, CN201710562901.3[ P ] 2017-11-03 ] proposes an anti-interference antenna integrated antenna device, which comprises an antenna bottom plate, a multi-feed point microstrip antenna unit, a plurality of anti-interference units and a joint component; the antenna has stable phase, a symmetrical directional diagram, a wider axial ratio bandwidth and an impedance bandwidth, but the structural unit cannot be miniaturized and the number of the antennas placed in the cavity is small.
In 2020, patent 5[ Mianyang North Star communication technology Co., Ltd., an adaptive small-volume Beidou third-generation anti-interference antenna, CN202020380994.5[ P ]. 2020-08-28 ] proposes an adaptive small-volume anti-interference antenna technology working in the Beidou third-generation frequency band, the device comprises 4 antenna units adopting composite materials with silver coated on the upper surface and adopting a Y-shaped arrangement method, the invention is easy to form hemispherical wave beams and has simple structure, but the antenna adopts single-feed performance which is not stable enough and cannot cover a plurality of frequency bands.
In summary, most GPS antennas are miniaturized by using a high dielectric constant method, which results in an insufficient antenna gain, or are miniaturized by using other methods, but the structure is more complicated. Currently, directors are mostly applied to linearly polarized antennas, and only a few are applied to circularly polarized antennas, while the application of directors is rare for microstrip antenna forms in GPS systems. Document 1 proposes a laminated antenna using an L-shaped probe feed, in which a single antenna covers three frequency bands of L1, L2, and L5 in the GPS, and the upper and lower layers are miniaturized by using dielectric plates having dielectric constants of 16 and 30, respectively, but the gain of the antenna is only 2 dBi. Although document 2 designs a miniaturized microstrip antenna loaded with a double-coupling short-circuit probe to cover the L1 and L2 frequency bands in the GPS, and the antenna unit has the advantages of broadband, miniaturization and higher gain, the antenna structure is more complex and the processing difficulty is greater. Patent 1 designs a GPS antenna structure and a GPS antenna wireless communication device, which do not place antennas of multiple frequency bands and have a relatively large unit size, although they have the advantage of high isolation. Patent 2 has designed a GPS antenna structure and GPS antenna wireless communication device, and the device has adopted the director to have the advantage that high directive property high gain, but this antenna structure size is too big and can't launch circular polarized wave. Patent 3 has designed a miniaturized seven array element self-adaptation anti-interference antenna, though has small, light in weight, the advantage that the consumption is little, the interference killing feature is strong, but the less performance of frequency channel that array element covered is comparatively single. Patent 4 designs an anti-interference antenna integrated antenna's device, and although the antenna has stable phase place, symmetrical directional diagram, wider axial ratio bandwidth and impedance bandwidth, this constitutional unit fails to miniaturize and the cavity is inside to place the antenna quantity less. Patent 5 designs a self-adaptive small-volume anti-interference antenna technology working in the third generation of the Beidou, the self-adaptive small-volume anti-interference antenna technology is easy to form hemispherical beams and simple in structure, but the antenna is unstable in single-feed performance and cannot cover multiple frequency bands. Therefore, a new 4-element GPS antijamming antenna array loaded with directors is needed to overcome the defects of the prior art.
Through the above analysis, the problems and defects of the prior art are as follows:
(1) in the prior art, the GPS anti-interference antenna is usually miniaturized by high dielectric constant or loading some parasitic structures on the microstrip patch antenna, which can cause that the gain is reduced by a certain extent or the size is not miniaturized enough.
(2) Aiming at a director, the prior art is rarely applied to a GPS anti-interference antenna in a micro-strip antenna form, and can not meet the requirements of miniaturization and high gain in a GPS anti-interference system.
The difficulty in solving the above problems and defects is: through the analysis, the miniaturization method of the modern common GPS anti-interference antenna system mostly uses high dielectric constant or loads some parasitic structures on a microstrip patch antenna, both methods have certain disadvantages, and through system research, the invention finds that a director is rarely applied to a GPS antenna system in a microstrip antenna form, the invention is characterized in that the dielectric constant of 10.2 is adopted as a dielectric plate, and the frequency ratio of B2B and R1, B2B and B1 is large are designed in a laminated mode, so that 13 antenna units containing 6 frequency bands of antennas are placed in a cavity with the radius of only 115mm, meanwhile, in order to improve certain antenna gains, a director suitable for the anti-interference 4-element array is designed, the director units are based on the center-symmetrical aesthetic design shape such as a 'yerbade cold' structure, the structures are distributed above and below the dielectric plate, the director units are miniaturized by adopting a zigzag structure, the antenna is integrated with a GPS microstrip antenna array, so that the gain is greatly improved, the axial ratio is correspondingly improved, the structure is simple and light, the antenna can be placed above the array in an integrated mode with an antenna housing, and no obvious defect is found at present.
The significance of solving the problems and the defects is as follows: miniaturization and high gain are important indexes of GPS antenna design, the existing invention is difficult to realize the miniaturization and high gain simultaneously, and the director is rarely applied to a GPS antenna system in the form of a microstrip patch. The invention has the innovation point that firstly, a unique array mode is adopted, the laminated design is carried out on the frequency band antenna with higher frequency, the antenna units are all miniaturized by adopting dielectric plates with the dielectric constant of 10.2, 13 antenna units with 6 frequency bands are placed in a cavity with the radius of 115mm, and secondly, the invention has the design of a Yelu broadcast cooling type director unit with the miniaturization advantage, the units in the form are arranged on the antenna units with low gain in a circular ring mode, and the gains of B3 and B2B are improved under the condition of not generating great influence on other frequency band antennas. The invention is simple and compact, is easy to process, and is widely applied to the GPS anti-interference antenna system in the form of a microstrip patch.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a 4-element GPS anti-interference antenna array loaded with a director and a mobile communication system.
The invention is realized in this way, a 4-element GPS anti-interference antenna array of the loading director, the director applied to GPS anti-interference antenna is provided with:
an antenna cavity;
the antenna cavity is provided with a microstrip antenna array, and the antenna units are tightly fixed by screws with the diameter of 2.5 mm.
Furthermore, the microstrip antenna array comprises six frequency band microstrip antenna arrays including B3, B2B, B1, R1, S and L1, a director structure consisting of Yelu cooling units is placed at the top of the microstrip antenna array, and the distance from the bottom of the director structure to the top of the cavity is 15 mm.
Furthermore, a plurality of screw holes are punched on the antenna cavity body and used for fixing the microstrip antenna unit.
Furthermore, the 13 antenna units are fixed above the cavity, the director structure is placed right above the antenna array, and the size of the outer diameter of the director is consistent with the size of the radius of the cavity.
Further, the director structure comprises an upper layer of a directing radiation patch, a lower layer of a directing radiation patch and a first antenna dielectric plate; the upper layer of the first antenna dielectric plate is printed with the upper layer of the guiding radiation patch, and the lower layer of the first antenna dielectric plate is printed with the lower layer of the guiding radiation patch.
Further, the size of the internal unit of the director is 47mm by 47mm, the thickness of the first antenna dielectric plate is 1mm, and the bending distance of each director unit is 3.4 mm; the dielectric constant of the first antenna dielectric plate is 2.65, the inner diameter of the annular array formed by the first antenna dielectric plate is 57.8mm, the outer diameter of the annular array is 115mm, the thickness of the annular array is 1mm, and the upper portion and the lower portion of the first antenna dielectric plate are distributed and placed with the guiding radiation patches.
Further, the microstrip antenna array comprises 4B 3 frequency band antennas, 4S frequency band antennas, 2B 2B frequency band antennas, 1B 2B frequency band and B1 frequency band laminated antenna, 1B 2B frequency band and R1 frequency band laminated antenna and 1L frequency band antenna.
The 4B 3 frequency band antennas are No. 2 dielectric plates, the size of each dielectric plate is 45mm x 6mm, the peripheral cutting angles are 10mm x 3mm and used for fixing the antennas, and B3 frequency band radiation patches are printed on the No. 2 dielectric plates; the 4S-band antennas are No. 3 dielectric plates, the size of each S-band antenna is 30mm x 6mm, the peripheral cutting angles of each S-band antenna are 12mm x 3mm and used for fixing the antennas, and S-band radiation patches are printed on the No. 3 dielectric plates; the 2B 2B frequency band antennas are No. 4 dielectric plates, the size of each dielectric plate is 48.8mm by 6mm, the peripheral cutting angles are 10mm by 3mm and used for fixing the antennas, and B2B frequency band radiation patches are printed on the No. 4 dielectric plates; a No. 5 dielectric plate and a No. 6 dielectric plate are respectively arranged above and below the laminated antenna with the 1B 2B frequency band and the B1 frequency band, the peripheral cutting angle is 10mm 3mm and used for fixing the antenna, a B1 frequency band radiation patch is printed above the No. 5 dielectric plate, and a B2B frequency band radiation patch is printed above the No. 6 dielectric plate; a No. 7 dielectric plate and a No. 8 dielectric plate are respectively arranged above and below the laminated antenna with the 1B 2B frequency band and the R1 frequency band, the peripheral cutting angle is 10mm x 3mm and used for fixing the antenna, an R1 frequency band radiation patch is printed above the No. 7 dielectric plate, and a B2B frequency band radiation patch is printed above the No. 8 dielectric plate; the 4L-band antennas are 9 dielectric plates, the size of each dielectric plate is 38mm x 6mm, the peripheral cutting angles are 10mm x 3mm and used for fixing the antennas, and L-band radiation patches are printed on the 9 dielectric plates.
The microstrip antenna radiation patch is fed by a bridge with equal amplitude and 90-degree phase shift, and the bridge is welded on the power dividing plate at the back of each antenna unit.
It is another object of the present invention to provide a mobile communication system comprising said 4-element GPS antijam antenna array loaded with directors.
Another object of the present invention is to provide a GPS antijamming antenna system, which includes the 4-element GPS antijamming antenna array of the loading director.
By combining all the technical schemes, the invention has the advantages and positive effects that: the invention provides a 4-element GPS anti-interference antenna array loaded with a director.A cavity of an antenna is provided with six frequency band microstrip antenna arrays comprising B3, B2B, B1, R1 and S, L1, and each microstrip antenna is tightly fixed with the cavity through m2.5 screws; seen from the outermost periphery, the outermost periphery comprises 4B 3 frequency band microstrip antennas, 2B 2B frequency band antennas, 1B 2B and R1 frequency band laminated antennas, 1B 2B and B1 frequency band laminated antennas, the secondary periphery comprises 4S frequency band microstrip antennas, 1L frequency band antenna is placed at the center, and the array comprises 13 antenna units in total; the director is a circular ring structure arranged right above the antenna array, and the distance from the top of the cavity to the bottom of the director is 15 mm; the microstrip antenna array is fixed on the metal cavity, the director is placed right above the microstrip antenna array, and the microstrip antenna array can be fixed by adopting a method of integrating with the antenna housing. The invention ensures that 13 antenna units are accommodated in a very limited space under the condition of antenna shape, the loaded director can greatly improve the gain of B3 and B2B frequency band antennas, and simultaneously improve the axial ratio characteristics of B3 and B2B, but does not have great influence on the gain of R1, B1, S and L frequency band antennas.
The invention can miniaturize each antenna unit under the condition of ensuring the performance of the antenna, and a plurality of antenna units with a plurality of frequency bands are placed under a relatively small-size structure. The director designed by the invention improves the gain of the corresponding frequency band antenna under the condition of not causing great influence on other frequency band antennas, improves the axial ratio of the corresponding antenna, and has compact structure and easy installation.
The array mode of the invention has the advantage of miniaturization of the antenna, and 13 unit antennas are placed in a cavity with the radius of 115mm by adopting a method of designing a high dielectric constant dielectric plate and a laminated antenna. For the unit with lower gain, the gain is improved by adopting a method of placing a director, and the overall performance of the 4-element GPS anti-interference antenna is ensured.
In summary, the present invention has a simple and compact structure, and can solve the problem that the miniaturization and high performance of the GPS anti-jamming antenna are difficult to be achieved at present by combining the antenna unit array design and the director, so that the present invention can be widely applied to the GPS anti-jamming antenna system requiring miniaturization.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a 4-element GPS anti-jamming antenna array loaded with a director according to an embodiment of the present invention;
in the figure: 1. a director structure; 2. 4-element GPS anti-interference microstrip antenna array; 3. a metal cavity.
FIG. 2 is a schematic diagram of a director structure provided by an embodiment of the present invention;
in the figure: 101. an upper director radiation patch; 102. a lower director radiation patch; 103. antenna I dielectric plate.
FIG. 3 is a schematic diagram of a microstrip antenna array according to an embodiment of the present invention;
in the figure: 201. b3 frequency band antenna units (1, 4 in total, placed every 90 degrees of rotation); 202. B2B frequency band antenna units (1, 2 in total, placed every 180 ° rotation); 203. B2B and B1 frequency band laminated antenna units (the B2B and the B1 frequency bands are respectively arranged in an up-down laminated mode, and the total number is 1); 204. B2B and R1 frequency band laminated antenna units (the B2B and R1 frequency bands are respectively arranged in an up-down laminated mode, and the total number is 1); 205. s-band antenna units (1, 4 per 90 ° rotation); 206. l-band antenna elements (1 for a single transmit antenna).
FIG. 4 is a schematic structural diagram of a metal chamber provided in an embodiment of the present invention;
in the figure: 301. m2.5 screw holes; 302. metal chamber (thickness 7 mm).
Fig. 5 is a comparison graph of simulation results of gain patterns of the B3 band antenna unit phi =90 ° before and after the loading director provided by the embodiment of the present invention.
Fig. 6 is a comparison graph of simulation results of gain patterns of the B3 band antenna unit phi =0 ° before and after the loading director provided by the embodiment of the present invention.
Fig. 7 is a comparison graph of simulation results of gain patterns of the B2B band antenna unit phi =90 ° before and after the loading director provided by the embodiment of the present invention.
Fig. 8 is a comparison graph of simulation results of gain patterns of the B2B band antenna unit phi =0 ° before and after the loading director provided by the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Aiming at the problems in the prior art and along with the development of a communication system, the GPS anti-interference antenna needs to be miniaturized and the performance of the antenna is ensured, the invention provides a 4-element GPS anti-interference antenna array loaded with a director and a mobile communication system, a microstrip antenna unit adopts a dielectric constant of 10.2 as a dielectric plate, and simultaneously, the laminated design is carried out on B2B, R1, B2B and B1 with larger frequency, so that 13 antenna units comprise antennas with 6 frequency bands and are placed in a cavity with the radius of only 115mm, and simultaneously, in order to improve the antenna gains of the B2B and B3 frequency bands, a director suitable for the anti-interference 4-element array is designed, the director unit is based on the center symmetry aesthetic design like a 'yersinian broadcast cooling' structure, the structure is distributed above and below the dielectric plate, the director unit is miniaturized by adopting a zigzag structure and is integrated with the GPS microstrip antenna array, the gain is greatly improved, and the axial ratio is correspondingly improved; the present invention is well suited for use in antenna systems that require miniaturization while ensuring high gain, and will be described in detail with reference to the accompanying drawings.
Those skilled in the art of the present invention can also implement other steps, and the 4-element GPS antijam antenna array loaded with a director of the present invention shown in fig. 1 is only one specific example.
As shown in fig. 1, a 4-element GPS antijamming antenna array loaded with a director according to an embodiment of the present invention includes: the structure of the director is 1, 4-element GPS anti-interference microstrip antenna array 2 and metal cavity 3. The metal cavity 3 is provided with a 4-element GPS anti-interference microstrip antenna array 2, and the back of the metal cavity 3 is tightly fixed with the 4-element GPS anti-interference microstrip antenna array through a screw hole; the 4-element GPS anti-interference microstrip antenna array 2 is a microstrip antenna array covering 13 antenna units with 6 frequency bands.
As shown in fig. 2, the director structure provided by the embodiment of the present invention includes: 101. an upper director radiation patch; 102. a lower director radiation patch; 103. antenna I dielectric plate.
The distance between the top of the metal cavity 3 and the bottom of the director structure 1 is 15mm, the 4-element GPS anti-interference microstrip antenna array 2 is fixed on the metal cavity 3, the outer diameter of the director structure 1 is consistent with the size of the metal cavity 3, and the director structure 1 can be tightly fixed in an integrated mode with an antenna housing.
The director structure 1 is composed of an upper directing radiation patch 101, a lower directing radiation patch 102 and a dielectric plate 1, the inner diameter of the whole director structure is 57.8mm, the outer diameter is 115mm, the director units are in an aesthetic design shape like a 'jean cooling' structure based on central symmetry, the structure is distributed above and below the dielectric plate, and the director units are miniaturized by adopting a zigzag structure.
The director units are rotated to form a 1 x 8 array according to the distribution condition of B2B and B3 frequency band antennas, and can be placed above the GPS anti-interference antenna array in an integrated mode with an antenna cover to form the 4-element GPS anti-interference antenna array loaded with the director.
As shown in fig. 3, the 4-element GPS anti-interference microstrip antenna array 2 according to the embodiment of the present invention includes: 201. b3 frequency band antenna units (1, 4 in total, placed every 90 degrees of rotation); 202. B2B frequency band antenna units (1, 2 in total, placed every 180 ° rotation); 203. B2B and B1 frequency band laminated antenna units (the B2B and the B1 frequency bands are respectively arranged in an up-down laminated mode, and the total number is 1); 204. B2B and R1 frequency band laminated antenna units (the B2B and R1 frequency bands are respectively arranged in an up-down laminated mode, and the total number is 1); 205. s-band antenna units (1, 4 per 90 ° rotation); 206. l-band antenna elements (1 for a single transmit antenna).
As shown in fig. 4, the metal cavity 3 provided in the embodiment of the present invention includes: 301. m2.5 screw holes; 302. metal chamber (thickness 7 mm).
The technical effects of the present invention will be described in detail with reference to simulation experiments.
Fig. 5 is a graph illustrating comparison of simulation results of gain patterns of the B3 band antenna elements phi =90 ° before and after the loading director in an embodiment of the present invention. As can be seen, the vertical gain of the B3 band without the directors is 2.94dBi, and the gain increases to 4.32dBi after the directors are loaded.
Fig. 6 is a graph for comparing simulation results of gain patterns of the B3 band antenna element phi =0 ° before and after the loading director in an embodiment of the present invention. As can be seen, the vertical gain of the B3 band without the directors is 2.94dBi, and the gain increases to 4.32dBi after the directors are loaded.
Fig. 7 is a graph for comparing simulation results of gain patterns of the B2B band antenna element phi =90 ° before and after the loading director in an embodiment of the present invention. As can be seen from the simulation results, the vertical gain value of the B2B frequency band without the director is 3.55dBi, and the gain is increased to 5.60dBi after the director is loaded.
Fig. 8 is a graph for comparing simulation results of gain patterns of the B3 band antenna element phi =0 ° before and after the loading director in an embodiment of the present invention. As can be seen from the simulation results, the vertical gain value of the B2B frequency band without the director is 3.55dBi, and the gain is increased to 5.60dBi after the director is loaded.
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When used in whole or in part, can be implemented in a computer program product that includes one or more computer instructions. When loaded or executed on a computer, cause the flow or functions according to embodiments of the invention to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, the computer instructions may be transmitted from one website site, computer, server, or data center to another website site, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL), or wireless (e.g., infrared, wireless, microwave, etc.)). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that includes one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.
The above description is only for the purpose of illustrating the present invention and the appended claims are not to be construed as limiting the scope of the invention, which is intended to cover all modifications, equivalents and improvements that are within the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The utility model provides a 4 yuan GPS anti-interference antenna array of loading director which characterized in that, the director who is applied to GPS anti-interference antenna is provided with:
an antenna cavity;
the antenna cavity is provided with a microstrip antenna array, and the antenna units are tightly fixed by screws with the diameter of 2.5 mm.
2. The director-loaded 4-element GPS jammer-resistant antenna array of claim 1, wherein the microstrip antenna array comprises six frequency band microstrip antenna arrays including B3, B2B, B1, R1, S and L1, and a director structure consisting of "yersinia cooling" shaped elements is placed on top of the microstrip antenna array, and the distance from the bottom of the director structure to the top of the cavity is 15 mm.
3. The director-loaded 4-element GPS jammer-resistant antenna array of claim 1, wherein the antenna cavity is tapped with screw holes for fixing the microstrip antenna elements.
4. The 4-element GPS antijam antenna array of claim 1, wherein 13 antenna units are fixed above the cavity, the structure of the director is placed right above the antenna array, and the size of the outer diameter of the director is the same as the size of the radius of the cavity.
5. The director-loaded 4-element GPS jammer-resistant antenna array of claim 1, wherein the director structure comprises an upper director radiation patch, a lower director radiation patch and an antenna dielectric slab; the upper layer of the first antenna dielectric plate is printed with the upper layer of the guiding radiation patch, and the lower layer of the first antenna dielectric plate is printed with the lower layer of the guiding radiation patch.
6. The 4-element GPS jammer-resistant antenna array with a loaded director of claim 1, wherein the director has internal element dimensions of 47mm by 47mm (calculated as the distance between parallel opposing sides), and the dielectric plate of antenna number one has a thickness of 1 mm; the dielectric constant of the first antenna dielectric plate is 2.65, the inner diameter of the annular array formed by the first antenna dielectric plate is 57.8mm, the outer diameter of the annular array is 115mm, the thickness of the annular array is 1mm, and the upper portion and the lower portion of the first antenna dielectric plate are distributed and placed with the guiding radiation patches.
7. The 4-element GPS antijam antenna array of claim 1, wherein, the microstrip antenna array includes 4B 3 frequency band antennas, 4S frequency band antennas, 2B 2B frequency band antennas, 1B 2B frequency band and B1 frequency band laminated antenna, 1B 2B frequency band and R1 frequency band laminated antenna and 1L frequency band antenna;
the 4B 3 frequency band antennas are No. 2 dielectric plates, the size of each dielectric plate is 45mm x 6mm, the peripheral cutting angles are 10mm x 3mm and used for fixing the antennas, and B3 frequency band radiation patches are printed on the No. 2 dielectric plates; the 4S-band antennas are No. 3 dielectric plates, the size of each S-band antenna is 30mm x 6mm, the peripheral cutting angles of each S-band antenna are 12mm x 3mm and used for fixing the antennas, and S-band radiation patches are printed on the No. 3 dielectric plates; the 2B 2B frequency band antennas are No. 4 dielectric plates, the size of each dielectric plate is 48.8mm by 6mm, the peripheral cutting angles are 10mm by 3mm and used for fixing the antennas, and B2B frequency band radiation patches are printed on the No. 4 dielectric plates; a No. 5 dielectric plate and a No. 6 dielectric plate are respectively arranged above and below the laminated antenna with the 1B 2B frequency band and the B1 frequency band, the peripheral cutting angle is 10mm 3mm and used for fixing the antenna, a B1 frequency band radiation patch is printed above the No. 5 dielectric plate, and a B2B frequency band radiation patch is printed above the No. 6 dielectric plate; a No. 7 dielectric plate and a No. 8 dielectric plate are respectively arranged above and below the laminated antenna with the 1B 2B frequency band and the R1 frequency band, the peripheral cutting angle is 10mm x 3mm and used for fixing the antenna, an R1 frequency band radiation patch is printed above the No. 7 dielectric plate, and a B2B frequency band radiation patch is printed above the No. 8 dielectric plate; the 4L-band antennas are 9 dielectric plates, the size of each dielectric plate is 38mm x 6mm, the peripheral cutting angles are 10mm x 3mm and used for fixing the antennas, and L-band radiation patches are printed on the 9 dielectric plates.
8. The 4-element GPS antijam antenna array of claim 7, wherein said microstrip antenna radiating patch is fed by a bridge of equal amplitude and 90 ° phase shift welded to the power splitter plate at the back of each antenna element.
9. A mobile communication system comprising a 4-element GPS jammer resistant antenna array loaded with directors as claimed in any one of claims 1 to 8.
10. A GPS jam-resistant antenna system including a 4-element GPS jam-resistant antenna array loaded with a director as claimed in any one of claims 1 to 8.
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