CN117954841A - Four-arm epitaxial spiral circularly polarized dielectric resonator antenna with top-loaded disc - Google Patents
Four-arm epitaxial spiral circularly polarized dielectric resonator antenna with top-loaded disc Download PDFInfo
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- 239000000523 sample Substances 0.000 claims abstract description 21
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 230000010287 polarization Effects 0.000 abstract description 15
- 230000005855 radiation Effects 0.000 abstract description 13
- 238000013461 design Methods 0.000 abstract description 4
- 229910052751 metal Inorganic materials 0.000 description 17
- 239000002184 metal Substances 0.000 description 17
- 238000012545 processing Methods 0.000 description 7
- 238000004088 simulation Methods 0.000 description 7
- 239000003989 dielectric material Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000011224 oxide ceramic Substances 0.000 description 2
- 229910052574 oxide ceramic Inorganic materials 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/362—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith for broadside radiating helical antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/002—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
- H01—ELECTRIC ELEMENTS
- 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
- 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
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/50—Feeding or matching arrangements for broad-band or multi-band operation
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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
- H01Q9/0485—Dielectric resonator antennas
- H01Q9/0492—Dielectric resonator antennas circularly polarised
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- Computer Networks & Wireless Communication (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Waveguide Aerials (AREA)
Abstract
The invention discloses a four-arm extension spiral circular polarization dielectric resonator antenna with a top-loaded disc, which comprises a first extension spiral line, a second extension spiral line, a third extension spiral line, a fourth extension spiral line, a dielectric disc, a grounding plate and a feed probe, wherein the first extension spiral line is connected with the first extension spiral line; each extension spiral line is perpendicular to the grounding plate and is overlapped in center, and the extension distances of each turn of spiral line of the first extension spiral line, the second extension spiral line, the third extension spiral line and the fourth extension spiral line are the same; the medium disc comprises an upper disc and a lower disc, the end part of each extension spiral line far away from the grounding plate is loaded with the lower disc, and the upper disc is arranged above the lower disc in parallel; by adopting the design of loading the integrated dielectric disc on the top of the four-arm epitaxial dielectric spiral line, the energy leakage is reduced, the radiation efficiency of the antenna is effectively increased, the gain of the antenna is improved, and the multi-layer dielectric disc is loaded on the top, so that the circular polarization axial ratio bandwidth can be effectively widened.
Description
Technical Field
The invention relates to the technical field of antenna engineering, in particular to a four-arm epitaxial spiral circularly polarized dielectric resonator antenna with a top-loaded disc.
Background
The traditional metal antenna has large geometric dimension when in a low frequency band, and has large metal antenna loss when in a high frequency band, so that the requirements of high gain and miniaturization required by the current wireless communication system are difficult to meet. And a dielectric resonator antenna is a resonant antenna, which is made of a low-loss microwave dielectric material, and its resonant frequency is determined by the size, shape and relative dielectric constant of the resonator. Compared with the traditional metal antenna, the radiating surface is large, no conductor loss exists, the self dielectric loss is low, and the metal antenna has the advantages of high radiating efficiency, small size, low weight, easy excitation and the like.
The spiral antenna can realize circular polarization characteristic due to unique structure and feeding, the traditional spiral antenna can be divided into a spiral whip antenna and a planar spiral antenna, and compared with the planar spiral antenna, the vertical spiral whip antenna has higher radiation efficiency, larger beam width and other electrical properties.
The epitaxial spiral dielectric resonator antenna is designed under the limit of a certain maximum size, and a technology for optimizing the shape of a spiral line is generally adopted, and comprises the steps of combining an Archimedes spiral with an equiangular spiral, bending and encircling the spiral line and the like, so that a current path can be effectively prolonged, a low-frequency bandwidth is expanded, or a sawtooth design is carried out on the spiral line to optimize performance.
In the related art, a four-arm spiral pattern reconfigurable antenna of a terahertz wave band is proposed in a patent application document with publication number of CN116544663A, an antenna metal layer is arranged on the upper surface of a first dielectric plate, and the antenna metal layer comprises four gradual-change spiral arm antenna units; the concave side of each gradual change spiral arm antenna unit faces to the center of the upper surface of the first dielectric plate, and the four gradual change spiral arm antenna units are rotationally symmetrical relative to the center of the upper surface of the first dielectric plate; each gradual change spiral arm antenna unit is formed by combining a straight arm and a gradual change spiral arm; the width of the gradual change spiral arm from the inner end to the outer end is gradual; however, the metal antenna has larger required size, lower gain and poor directivity in the corresponding wave band, and cannot meet the current demands for miniaturization and portability of the antenna.
In the patent application document with the publication number of CN110739525A, a VHF frequency band satellite-borne four-arm spiral antenna is proposed, a four-arm spiral and a metal frustum are integrally designed, a short-circuit metal disc is not supported in the middle, the metal frustum is arranged on the bottom surface of the four-arm spiral, so that the cone tip of the metal frustum is suspended above a through hole of a mounting base, a gap exists between the metal frustum and the metal frustum, and the short-circuit metal disc is arranged on the top surface of the four-arm spiral and fixedly connected with an antenna housing through an adhesive; but the antenna has a larger longitudinal dimension, and has the problems of larger loss and lower gain.
Disclosure of Invention
The technical problem to be solved by the invention is how to improve the performance of the helical circularly polarized dielectric resonator antenna.
The invention solves the technical problems by the following technical means:
A four-arm epitaxial helical circularly polarized dielectric resonator antenna for a top loaded disk is presented, comprising: the device comprises a first epitaxial spiral line, a second epitaxial spiral line, a third epitaxial spiral line, a fourth epitaxial spiral line, a dielectric disc, a grounding plate and a feed probe; the first epitaxial spiral line, the second epitaxial spiral line, the third epitaxial spiral line and the fourth epitaxial spiral line are perpendicular to the grounding plate and are arranged in a center-to-center manner, and the epitaxial distances of each turn of spiral line of the first epitaxial spiral line, the second epitaxial spiral line, the third epitaxial spiral line and the fourth epitaxial spiral line are the same;
The dielectric disc comprises an upper disc and a lower disc, wherein the end part, far away from the grounding plate, of the first epitaxial spiral line, the second epitaxial spiral line, the third epitaxial spiral line and the fourth epitaxial spiral line is loaded with the lower disc, and the upper disc is arranged above the lower disc in parallel.
Further, the first epitaxial spiral, the second epitaxial spiral, the third epitaxial spiral and the fourth epitaxial spiral are preformed spiral dielectric lines.
Further, the four-wall epitaxial spiral line formed by the first epitaxial spiral line, the second epitaxial spiral line, the third epitaxial spiral line and the fourth epitaxial spiral line is of a symmetrical structure formed by uniformly surrounding rectangular solid with the same length and width in section.
Further, the second epitaxial spiral, the third epitaxial spiral and the fourth epitaxial spiral may be obtained by rotating the first epitaxial spiral by 90 °, 180 ° and 270 ° along a center line, respectively.
Further, the first extension spiral line, the second extension spiral line, the third extension spiral line and the fourth extension spiral line are connected with the other end portion of the grounding plate, and initial side wall surfaces of the other end portion are rectangular and perpendicular to the grounding plate and are connected with the grounding plate.
Further, the lower layer disc is a preformed medium disc and is loaded integrally with a four-arm epitaxial spiral line formed by the first epitaxial spiral line, the second epitaxial spiral line, the third epitaxial spiral line and the fourth epitaxial spiral line.
Further, the upper layer disc is arranged at intervals parallel to the lower layer disc, and the centers of the upper layer disc and the lower layer disc are the same.
Further, the lower disc is arranged parallel to the grounding plate, and the height of the lower disc is equal to the middle point of the vertical tangential plane at the top of the four-arm extension spiral line.
Further, the feed probe is of a planar rectangular structure and feeds a coaxial probe.
Further, the feed probe is respectively positioned on the initial side wall surfaces of the first epitaxial spiral line, the second epitaxial spiral line, the third epitaxial spiral line and the fourth epitaxial spiral line; the broadside axis of the feed probe coincides with the bottom side axis of the initial sidewall surface.
Further, the grounding plate is a rectangular grounding plate.
Further, the first epitaxial spiral line, the second epitaxial spiral line, the third epitaxial spiral line, the fourth epitaxial spiral line and the medium disc are all formed by processing alumina ceramics.
The invention has the advantages that:
(1) The invention adopts a mode of combining a four-arm spiral and an Archimedes spiral to extend outwards, and can realize wider bandwidth, higher gain and good circular polarization characteristic by loading a simple matching circuit; structurally, the design of loading the integrated dielectric disc on the top of the four-arm epitaxial dielectric spiral line is adopted, so that energy leakage is reduced, the radiation efficiency of the antenna is effectively increased, the gain of the antenna is improved, and the circular polarization axial ratio bandwidth can be effectively widened by adopting multi-layer dielectric disc treatment on the basis of loading the integrated dielectric disc on the top.
(2) The spiral structure loaded by the medium is adopted, the vertical spiral section is rectangular, the processing is easy, and the array is easy to assemble on the premise of meeting other performance requirements.
(3) The four-arm epitaxial spiral line is formed by loading a medium, has the advantages of high radiation efficiency, small loss and the like, and can effectively improve the antenna gain.
(4) The four-arm epitaxial spiral line and the dielectric disc are formed by processing aluminum oxide ceramics with higher dielectric coefficients, and the size of the antenna is smaller than that of the antenna by adopting metal processing.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a schematic perspective view of a four-arm epitaxial spiral circularly polarized dielectric resonator antenna with a top-loaded disk according to an embodiment of the present invention;
FIG. 2 is a front view of a top-loaded disk quadrifilar epitaxial helical circularly polarized dielectric resonator antenna in accordance with an embodiment of the present invention;
FIG. 3 is a top view of a top-loaded disk quadrifilar epitaxial helical circularly polarized dielectric resonator antenna in accordance with an embodiment of the present invention;
FIG. 4 is a front view of a four-arm epitaxial helical circularly polarized dielectric resonator antenna with a top unloaded disk according to one embodiment of the present invention;
FIG. 5 is a top view of a four-arm epitaxial spiral circularly polarized dielectric resonator antenna with a top unloaded disk according to one embodiment of the present invention;
FIG. 6 is a schematic diagram of the structure of a dielectric disc according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of the S11 parameters of a four-arm epitaxial helical circularly polarized dielectric resonator antenna with a top-loaded multi-layer disk in accordance with an embodiment of the present invention;
FIG. 8 is a graph of axial ratio of a four-arm epitaxial helical circularly polarized dielectric resonator antenna with a disk unloaded from the top in an embodiment of the invention;
FIG. 9 is a graph of axial ratio of a four-arm epitaxial helical circularly polarized dielectric resonator antenna with a top-loaded multi-layer disk in accordance with an embodiment of the present invention;
FIG. 10 is a graph of gain for a four-arm epitaxial helical circularly polarized dielectric resonator antenna with a disk unloaded from the top in one embodiment of the invention;
FIG. 11 is a graph of gain for a four-arm epitaxial helical circularly polarized dielectric resonator antenna with a top loaded disk in accordance with an embodiment of the present invention;
Fig. 12 is a phi=0 ° radiation pattern for a four-arm epitaxial helical circularly polarized dielectric resonator antenna of a top-loaded disk in an embodiment of the present invention;
Fig. 13 is a phi=90 ° radiation pattern for a four-arm epitaxial helical circularly polarized dielectric resonator antenna of a top loaded disk in an embodiment of the present invention.
In the figure:
A first epitaxial spiral; 2-a second epitaxial spiral; 3-a third epitaxial spiral; 4-a fourth epitaxial spiral; 5-feeding the probe; 6-a ground plate; 7-a lower disc; 8-upper layer disc.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described in the following in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1 to 3, an embodiment of the present invention discloses a four-arm epitaxial spiral circularly polarized dielectric resonator antenna with a top loading disk, which is characterized by comprising: the device comprises a first epitaxial spiral line 1, a second epitaxial spiral line 2, a third epitaxial spiral line 3, a fourth epitaxial spiral line 4, a dielectric disc, a grounding plate 6 and a feed probe 5; the first epitaxial spiral line 1, the second epitaxial spiral line 2, the third epitaxial spiral line 3 and the fourth epitaxial spiral line 4 are all arranged perpendicular to the grounding plate 6 and are overlapped in center, and each turn of spiral line of the first epitaxial spiral line 1, the second epitaxial spiral line 2, the third epitaxial spiral line 3 and the fourth epitaxial spiral line 4 has the same epitaxial distance; the feed probes 5 are positioned on the initial side wall surface of each extension spiral line and are connected with the grounding plate 6; the dielectric disc comprises an upper disc 8 and a lower disc 7, the ends of the first epitaxial spiral line 1, the second epitaxial spiral line 2, the third epitaxial spiral line 3 and the fourth epitaxial spiral line 4 far away from the grounding plate 6 are loaded with the lower disc 7, and the upper disc 8 is arranged above the lower disc 7 in parallel.
In the embodiment, the four-arm spiral and the Archimedes spiral are combined to extend outwards, and compared with the antenna with the unloaded dielectric disc shown in fig. 4-5, the antenna can realize wider bandwidth, higher gain and good circular polarization characteristic by loading a simple matching circuit; in the structure, a dielectric disc is loaded on the top of the four-arm epitaxial spiral line, after electromagnetic waves are radiated to the top end through the four-arm epitaxial spiral line, the disc is integrally loaded on the lower layer to prevent radiation leakage, so that the radiation efficiency and the antenna gain are improved, and the upper layer disc can improve the axial ratio bandwidth; the design of loading the integrated dielectric disc on the top of the four-arm epitaxial dielectric spiral line is adopted, so that the energy leakage is reduced, the antenna radiation efficiency is effectively increased, the antenna gain is improved, and the circular polarization axial ratio bandwidth can be effectively widened by adopting multi-layer dielectric disc treatment on the basis of loading the integrated dielectric disc on the top.
In an embodiment, the first epitaxial spiral 1, the second epitaxial spiral 2, the third epitaxial spiral 3 and the fourth epitaxial spiral 4 are all preformed spiral dielectric lines; the first epitaxial spiral line 1, the second epitaxial spiral line 2, the third epitaxial spiral line 3 and the fourth epitaxial spiral line 4 are connected with the other end part of the grounding plate 6, and the initial side wall surfaces of the other end part are all rectangular with the same length and width, are perpendicular to the grounding plate 6 and are connected with the grounding plate 6.
The spiral structure loaded by the medium is adopted, the vertical spiral section is rectangular, the processing is easy, and the array is easy to assemble on the premise of meeting other performance requirements; the four-arm epitaxial spiral line is formed by loading a medium, has the advantages of high radiation efficiency, small loss and the like, and can effectively improve the antenna gain.
Further, the four-wall epitaxial spiral line formed by the first epitaxial spiral line, the second epitaxial spiral line, the third epitaxial spiral line and the fourth epitaxial spiral line is of a symmetrical structure formed by uniformly surrounding a rectangle with the same length and width in a three-dimensional mode, for example, the second epitaxial spiral line, the third epitaxial spiral line and the fourth epitaxial spiral line are obtained by respectively rotating the first epitaxial spiral line by 90 degrees, 180 degrees and 270 degrees along the central line, and the circular polarization requirement of an antenna is met.
In one embodiment, as shown in fig. 6, the lower disc 7 is a preformed dielectric disc, and is integrally loaded with a four-arm epitaxial spiral formed by the first epitaxial spiral 1, the second epitaxial spiral 2, the third epitaxial spiral 3 and the fourth epitaxial spiral 4; the upper layer disc 8 is arranged in parallel with the lower layer disc 7 at intervals, and the centers of the upper layer disc and the lower layer disc are the same; the lower disc 7 is arranged parallel to the grounding plate 6, and the height of the lower disc 7 is equal to the middle point of the vertical tangential plane at the top of the four-arm extension spiral line.
The lower layer disc and the four-arm extension spiral line are integrally loaded, so that the energy leakage can be reduced, the radiation efficiency is effectively improved, and the antenna gain is improved; the upper layer disc is parallel to the lower layer disc, and a certain gap is formed between the upper layer disc and the lower layer disc, so that the circular polarization axial ratio bandwidth of the antenna can be improved.
In one embodiment, the feeding probe 5 is a planar rectangular structure and feeds a coaxial probe; the feed probe 5 is respectively positioned on the initial side wall surfaces of the first epitaxial spiral 1, the second epitaxial spiral 2, the third epitaxial spiral 3 and the fourth epitaxial spiral 4; the broadside axis of the feed probe 5 coincides with the bottom side axis of the initial side wall surface, and the bottom side is connected with the grounding plate 6.
In one embodiment, the grounding plate 6 is a preformed rectangular metal plate with the same length and width, and maintains an axisymmetric and centrosymmetric structure.
In an embodiment, the first epitaxial spiral 1, the second epitaxial spiral 2, the third epitaxial spiral 3, the fourth epitaxial spiral 4 and the dielectric disc are all formed by processing aluminum oxide ceramics.
The optimal parameters of the antenna are determined through simulation:
the lower medium disc is a preformed medium disc, the radius is 75mm, the thickness is 16mm, and the lower medium disc and the four-arm extension spiral line are loaded integrally;
The upper medium disc is a preformed medium disc, the radius is 40mm, and the thickness is 3mm; the upper medium disks are spaced in parallel by 1mm, and the medium material is alumina ceramic.
The first epitaxial spiral line 1, the second epitaxial spiral line 2, the third epitaxial spiral line 3 and the fourth epitaxial spiral line 4 are preformed spiral medium lines, the number of turns is 0.75, the vertical section is a rectangle with the same length and width, the distance between each two spiral lines is 20mm, the height between each two spiral lines is the same, and the distance between each two spiral lines is 61mm; the extension distance of each turn of the first extension spiral line 1, the second extension spiral line 2, the third extension spiral line 3 and the fourth extension spiral line 4 is the same, and the distance is 60mm; the first epitaxial spiral line 1, the second epitaxial spiral line 2, the third epitaxial spiral line 3, the fourth epitaxial spiral line 4 and the lower layer dielectric disc are formed by processing dielectric materials, and the dielectric materials are alumina ceramics.
The feed probe 5 is of a plane rectangular structure and is used for feeding a coaxial probe, and the length is 17mm and the width is 3mm.
The grounding plate 6 is a rectangular metal plate with the same length and width and is 200mm.
Electromagnetic simulation is carried out to obtain the performance test result of the antenna: fig. 7 is an S-parameter graph of a four-arm epitaxial spiral circularly polarized dielectric resonator antenna with a multilayer disk loaded on top after electromagnetic simulation, and it can be seen that reflection coefficients in the frequency band of 1.80GHz-2.64GHz are all smaller than-10 dB, and the uniformity is good.
Fig. 8 is an axial ratio graph of a four-arm epitaxial spiral circularly polarized dielectric resonator antenna with a multilayer disk not loaded on the top after electromagnetic simulation, and it can be seen that the axial ratio coefficients in the frequency band of 1.14GHz-2.88GHz are all smaller than 3dB, and circular polarization can be realized in the frequency band, so that the circular polarization requirement is met. Fig. 9 is an axial ratio graph of a four-arm epitaxial spiral circularly polarized dielectric resonator antenna with a multilayer disk loaded on the top after electromagnetic simulation, and it can be seen that the axial ratio coefficients in the frequency band of 0.5GHz-3GHz are all less than 3dB, and the axial ratio bandwidth is wider than that of a structure without the multilayer disk loaded on the top.
Fig. 10 is a graph of gain of a four-arm epitaxial circular polarized dielectric resonator antenna with a disk unloaded from the top after electromagnetic simulation, and fig. 11 is a graph of gain of a four-arm epitaxial circular polarized dielectric resonator antenna with a multi-layer disk loaded from the top after electromagnetic simulation, wherein the gain is effectively improved after the disk structure is loaded on the top by the four-arm epitaxial circular polarized dielectric resonator antenna compared with the gain in the working frequency band.
Fig. 12 is a radiation pattern of phi=0 ° for a four-arm epitaxial spiral circularly polarized dielectric resonator antenna with a top-loaded multilayer disk, frequency of 2.25ghz, phi=0 ° for E-plane, solid black line for right-hand polarization, and dashed black line for left-hand polarization. Fig. 13 is a radiation pattern of phi=90 ° for a four-arm epitaxial spiral circularly polarized dielectric resonator antenna with a top-loaded multilayer disk, frequency of 2.25ghz, phi=90 ° for E-plane, solid black line for right-hand polarization, and dashed black line for left-hand polarization.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (10)
1. A top-loaded disk quadrifilar epitaxial helical circularly polarized dielectric resonator antenna comprising: the device comprises a first epitaxial spiral line, a second epitaxial spiral line, a third epitaxial spiral line, a fourth epitaxial spiral line, a dielectric disc, a grounding plate and a feed probe; the first epitaxial spiral line, the second epitaxial spiral line, the third epitaxial spiral line and the fourth epitaxial spiral line are perpendicular to the grounding plate and are arranged in a center-to-center manner, and the epitaxial distances of each turn of spiral line of the first epitaxial spiral line, the second epitaxial spiral line, the third epitaxial spiral line and the fourth epitaxial spiral line are the same; the feed probes are positioned on the initial side wall surface of each extension spiral line and are connected with the grounding plate;
The dielectric disc comprises an upper disc and a lower disc, wherein the end part, far away from the grounding plate, of the first epitaxial spiral line, the second epitaxial spiral line, the third epitaxial spiral line and the fourth epitaxial spiral line is loaded with the lower disc, and the upper disc is arranged above the lower disc in parallel.
2. The top-loaded disk four-arm epitaxial spiral circularly polarized dielectric resonator antenna of claim 1, wherein the first epitaxial spiral, the second epitaxial spiral, the third epitaxial spiral, and the fourth epitaxial spiral are preformed spiral dielectric wires; and the four-wall epitaxial spiral line formed by the first epitaxial spiral line, the second epitaxial spiral line, the third epitaxial spiral line and the fourth epitaxial spiral line is of a symmetrical structure formed by uniformly encircling rectangular solid with the same length and width in section.
3. The top-loading disk four-arm epitaxial spiral circularly polarized dielectric resonator antenna of claim 1, wherein the first epitaxial spiral, the second epitaxial spiral, the third epitaxial spiral, and the fourth epitaxial spiral are each rectangular and each have a starting sidewall surface perpendicular to and contiguous with the ground plate.
4. The top-loading disk four-arm epitaxial spiral circularly polarized dielectric resonator antenna of claim 1, wherein the lower disk is a preformed dielectric disk loaded integrally with a four-arm epitaxial spiral comprised of the first epitaxial spiral, the second epitaxial spiral, the third epitaxial spiral, and the fourth epitaxial spiral.
5. The top-loaded disk four-arm epitaxial spiral circularly polarized dielectric resonator antenna of claim 1, wherein the upper disk is spaced parallel to the lower disk and centered about the same.
6. The top-loaded disk four-arm epitaxial spiral circularly polarized dielectric resonator antenna of claim 4, wherein the lower disk is disposed parallel to the ground plane and the height of the lower disk is equal to the mid-point of the top vertical tangent plane of the four-arm epitaxial spiral.
7. The top-loaded disk four-arm epitaxial spiral circularly polarized dielectric resonator antenna of claim 1, wherein the feed probe is a planar rectangular structure and feeds a coaxial probe.
8. The top-loaded disk four-arm epitaxial spiral circularly polarized dielectric resonator antenna of claim 1, wherein the feed probe is located on the starting sidewall surface of the first epitaxial spiral, the second epitaxial spiral, the third epitaxial spiral, and the fourth epitaxial spiral, respectively; the broadside axis of the feed probe coincides with the bottom side axis of the initial sidewall surface.
9. The top-loaded disk four-arm epitaxial spiral circularly polarized dielectric resonator antenna of claim 1, wherein the ground plate is a rectangular ground plate.
10. A top-loading disk quadrifilar helix circularly polarised dielectric resonator antenna according to any of claims 1 to 9, in which the first, second, third, fourth and dielectric disks are all formed from alumina ceramic.
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| CN202410142489.XA CN117954841A (en) | 2024-01-31 | 2024-01-31 | Four-arm epitaxial spiral circularly polarized dielectric resonator antenna with top-loaded disc |
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| CN202410142489.XA CN117954841A (en) | 2024-01-31 | 2024-01-31 | Four-arm epitaxial spiral circularly polarized dielectric resonator antenna with top-loaded disc |
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