CN118156790A - Dual-polarized microstrip parasitic array antenna with inclined beam - Google Patents
Dual-polarized microstrip parasitic array antenna with inclined beam Download PDFInfo
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- CN118156790A CN118156790A CN202410455215.6A CN202410455215A CN118156790A CN 118156790 A CN118156790 A CN 118156790A CN 202410455215 A CN202410455215 A CN 202410455215A CN 118156790 A CN118156790 A CN 118156790A
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- 230000003071 parasitic effect Effects 0.000 title claims abstract description 16
- 230000005284 excitation Effects 0.000 claims abstract description 46
- 239000002184 metal Substances 0.000 claims abstract description 23
- 239000000758 substrate Substances 0.000 claims abstract description 23
- 230000009977 dual effect Effects 0.000 claims description 15
- 230000005855 radiation Effects 0.000 abstract description 18
- 238000002955 isolation Methods 0.000 abstract description 4
- 239000002356 single layer Substances 0.000 abstract description 3
- 238000005388 cross polarization Methods 0.000 abstract description 2
- 230000010287 polarization Effects 0.000 description 16
- 238000012360 testing method Methods 0.000 description 9
- 230000005684 electric field Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 238000004088 simulation Methods 0.000 description 6
- 238000005452 bending Methods 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
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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 relates to the technical field of antennas, in particular to a dual-polarized microstrip parasitic array antenna of an inclined beam. Comprising the following steps: the coaxial line feed type electromagnetic wave excitation device comprises a dielectric substrate, a metal floor, a 50 omega coaxial line feed, a curved microstrip line and a plurality of circular ring-shaped excitation patches; the circular excitation patches with different sizes are arranged on the medium substrate at equal intervals, the metal floor is arranged on the lower surface of the medium substrate, 50 omega coaxial line feed is arranged on the lower surface of the metal floor, and the metal floor is respectively connected with the circular patches of the curved microstrip line, so that the metal floor is connected to the edge of the first circular patch unit to excite the whole parasitic array. The microstrip parasitic array antenna structure disclosed by the invention has the advantages of small appearance, small volume, single-layer structure, single-end driving, stable inclination angle, wide bandwidth, high isolation, high cross polarization purity, high radiation efficiency and the like, and has great application potential in the scenes of base stations and the like.
Description
Technical Field
The invention relates to the technical field of antennas, in particular to a dual-polarized microstrip parasitic array antenna of an inclined beam.
Background
Tilt beam antennas are widely used in various wireless communication systems including base stations, radars, satellites, and the like. Compared with an omni-directional antenna, the tilted beam antenna can focus a beam to an expected direction and has the advantages of high gain, increased channel capacity, increased data transmission rate, increased signal-to-noise-and-interference ratio and the like. Dual polarized antennas have been widely used as base station antennas due to their ability to increase system capacity and mitigate the effects of multipath fading. In recent years, the development of dual polarized oblique beam microstrip parasitic array antennas has also received particular attention.
Disclosure of Invention
The invention aims to provide a dual-polarized microstrip parasitic array antenna with oblique beams.
The invention aims at realizing the technical scheme that the antenna comprises a dielectric substrate, a metal floor, a 50 omega coaxial line feed, a curved microstrip line and a plurality of circular excitation patches;
The metal floor is arranged on the lower surface of the dielectric substrate, two 50 omega coaxial line feeds are arranged on the lower surface of the metal floor, one end of each of two curved microstrip antennas symmetrically arranged on the upper surface of the dielectric substrate is respectively connected with one 50 omega coaxial line feed, and the other end of each of the two curved microstrip antennas is connected with the nearest annular excitation patch;
The circular ring type excitation patches are arranged on the upper surface of the dielectric substrate at equal intervals, and the inner diameters and the outer diameters of the circular ring type excitation patches are sequentially reduced from the nearest to the curved microstrip antenna to the far from the curved microstrip antenna.
Further, the curved microstrip antennas comprise circular patches, a first connection patch and a second connection patch which are sequentially connected;
The circular patch is connected with a 50 omega coaxial line feed, and the second connecting patch is connected with the circular excitation patch;
The joint of the first connecting patch and the second connecting patch forms a first included angle, and the second connecting patch forms a second included angle with the y axis;
the second connecting patch is gradually increased in width from one end close to the first connecting patch to one end close to the annular excitation patch.
Further, the length L of the dielectric substrate is 113mm, the width W is 44mm, and the total thickness h of the dielectric substrate and the metal floor is 4mm;
The spacing width g between the annular excitation patches is 1.5mm.
Further, the first included angle is 60 degrees, and the second included angle is 45 degrees;
the length of the first connection patch is 7.16mm, and the length of the second connection patch is 5.20mm.
Further, the ratio R i2/Ri1 =0.55 of the inner radius R i2 and the outer radius R i1 of the annular excitation patch.
Further, the number of the annular excitation patches is 5, and specific parameters are designed as follows:
The outer diameters of the first circular strips of the first to fifth circular excitation patches are respectively: r 11＝9.65mm、R21＝9.40mm、R31＝9.07mm、R41 =8.57 mm and R 51 =6.92 mm.
Due to the adoption of the technical scheme, the invention has the following advantages:
The microstrip patch antenna array is designed based on a plurality of circular metal patches with different sizes, and the refractive index of the aperiodic patch units can be adjusted only by modulating the specific sizes of the non-periodically loaded circular metal patches under the condition that the proportion relation of the patch structures is kept unchanged, so that the distribution of patch units with different sizes corresponding to the refractive index distribution meeting the customized beam dip angle is comprehensively obtained, and the proposed antenna has the advantages of high efficiency, simple structure, compact size, single-layer design, no need of an additional feed network and the like.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objects and other advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
The drawings of the present invention are described below.
Fig. 1 is a schematic structural diagram of an antenna according to the present invention.
Fig. 2 is a top view of the antenna of the present invention.
Fig. 3 is a side view of the antenna of the present invention.
Fig. 4 is a schematic diagram of a plot of S parameter of an antenna according to the frequency variation in an embodiment of the present invention.
Fig. 5 is a diagram of a polarized radiation pattern of-45 ° for a 4.6GHz frequency point of an antenna under port 1 excitation in an embodiment of the present invention.
Fig. 6 is a diagram of a polarized radiation pattern of-45 ° for a 4.7GHz frequency point of an antenna under port 1 excitation in an embodiment of the present invention.
Fig. 7 is a diagram of a polarized radiation pattern of-45 ° for a 4.8GHz frequency point of an antenna under port 1 excitation in an embodiment of the present invention.
Fig. 8 is a diagram of a polarized radiation pattern of-45 ° for a 4.9GHz frequency point of an antenna under port 1 excitation in an embodiment of the present invention.
Fig. 9 is a +45° polarized radiation pattern for an antenna at a frequency of 4.6GHz under port 2 excitation in an embodiment of the present invention.
Fig. 10 is a +45° polarized radiation pattern for an antenna at a frequency of 4.7GHz under port 2 excitation in an embodiment of the invention.
Fig. 11 is a +45° polarized radiation pattern for an antenna at a frequency of 4.8GHz under port 2 excitation in an embodiment of the present invention.
Fig. 12 is a +45° polarized radiation pattern for an antenna at a frequency of 4.9GHz under port 2 excitation in an embodiment of the invention.
In the figure: 1-a dielectric substrate; 2-metal floor; a 3-coaxial feed structure; 5-bending a microstrip line; 7-circular ring shaped radiating elements.
Detailed Description
The invention is further described below with reference to the drawings and examples.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In describing embodiments of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "coupled," and "connected" should be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in embodiments of the present invention will be understood in detail by those of ordinary skill in the art.
The dual-polarized microstrip parasitic array antenna of the oblique wave beam is shown in fig. 1 to 3, and comprises a dielectric substrate 1, a metal floor 2, 50 omega coaxial line feed 3, a curved microstrip line 5 and a microstrip patch antenna array attached to the dielectric substrate 1;
the microstrip patch antenna array comprises a plurality of annular excitation patches 7 which are arranged on the dielectric substrate 1 at equal intervals, and the metal floor 2 is arranged on the lower surface of the dielectric substrate 1;
The 50 ohm coaxial line feeds 3 and 4 are arranged on the lower surface of the metal floor 2, and the 50 ohm coaxial line feeds 3 are respectively connected with a circular patch of the bending microstrip line 5 through the metal floor 2, and are further connected with one circular excitation patch 7 of the microstrip patch antenna array through the bending microstrip line.
The microstrip patch antenna array comprises a plurality of annular excitation patches 7 which are arranged on the dielectric substrate 1 at equal intervals, and the metal floor 2 is arranged on the lower surface of the dielectric substrate 1.
The 50 ohm coaxial line feed 3 is arranged on the lower surface of the metal floor 2, and the 50 ohm coaxial line feed 3 is respectively connected with a circular patch of the bending microstrip line 5 through the metal floor 2, and is further connected with one circular excitation patch 7 of the microstrip patch antenna array through the bending microstrip line.
The circular ring-shaped excitation patch 7 shown in fig. 2 has an outer diameter Ri 1 (i=1, 2, …, n), an inner diameter Ri2 (i=1, 2, …, n), and a ratio of Ri 2/ri1=0.55.
The two second connection patches are symmetrical about the y-axis + -45 deg. and are gradual in width, the first connection patch has a length of 7.16mm, the second connection patch has a length of 5.20mm, and the first connection patch and the second connection patch have an included angle of 60 deg..
Simulation:
In this embodiment, the inner conductor of the coaxial feed structure is connected to a circular patch of a curved microstrip line, and further connected to one of the circular excitation patches 7 of the microstrip patch antenna array through the curved microstrip line.
The dielectric substrate 1 was formed of a material of Rogers RT/duroid 5880, a relative permittivity of 2.2, a loss tangent of 0.0009, a length L of 65.5mm, a width W of 40mm, and a thickness h of 4mm.
Simulation analysis is carried out by using high-frequency electromagnetic simulation software HFSS, and the optimal size of each parameter after simulation optimization is shown in the following table.
According to the parameters, the reflection coefficient characteristic parameters of the designed dual-polarized antenna array are subjected to simulation analysis and test by using HFSS, and the analysis results are as follows:
fig. 4 is an S-parameter simulation curve of the dual polarized array antenna of the present invention. Simulation results show that the antenna can work at 4.47-4.99GHz, the port isolation is greater than 23dB in the relevant bandwidth range, and the maximum isolation is 49.7dB.
Fig. 5 shows the pattern characteristics of the dual polarized array antenna of the present invention at 4.6GHz under the excitation of port 1, and the test result shows that the antenna exhibits good side-emitting radiation characteristics in the electric field plane direction, and the polarization mode of the antenna is-45 ° linear polarization.
Fig. 6 shows the pattern characteristics of the dual polarized array antenna of the present invention at 4.7GHz under the excitation of port 1, and the test result shows that the antenna exhibits good side-emitting radiation characteristics in the electric field plane direction, and the polarization mode of the antenna is-45 ° linear polarization.
Fig. 7 shows the pattern characteristics of the dual polarized array antenna of the present invention at 4.8GHz under the excitation of port 1, and the test result shows that the antenna exhibits good side-emitting radiation characteristics in the electric field plane direction, and the polarization mode of the antenna is-45 ° linear polarization.
Fig. 8 shows the pattern characteristics of the dual polarized array antenna of the present invention at 4.9GHz under the excitation of port 1, and the test result shows that the antenna exhibits good side-emitting radiation characteristics in the electric field plane direction, and the polarization mode of the antenna is-45 ° linear polarization.
Fig. 9 shows the pattern characteristics of the dual polarized array antenna of the present invention at 4.6GHz under the excitation of port 2, and the test result shows that the antenna exhibits good side-emitting radiation characteristics in the electric field plane direction, and the polarization mode of the antenna is +45° linear polarization.
Fig. 10 shows the pattern characteristics of the dual-polarized array antenna at 4.7GHz under the excitation of the port 2, and the test result shows that the antenna shows good side-emitting radiation characteristics in the direction of the electric field plane, and the polarization mode of the antenna is +45° linear polarization.
Fig. 11 shows the pattern characteristics of the dual-polarized array antenna at 4.8GHz under the excitation of port 2, and the test result shows that the antenna shows good side-emission radiation characteristics in the direction of the electric field plane, and the polarization mode of the antenna is +45° linear polarization.
Fig. 12 shows the pattern characteristics of the dual polarized array antenna of the present invention at 4.9GHz under the excitation of port 2, and the test result shows that the antenna exhibits good side-emitting radiation characteristics in the electric field plane direction, and the polarization mode of the antenna is +45° linear polarization.
The dual-polarized microstrip parasitic array antenna of the self-defined oblique beam has the advantages of small appearance, small volume, single-layer structure, single-ended driving, stable oblique angle, wide bandwidth, high isolation, high cross polarization purity, high radiation efficiency and the like.
Finally, it should be noted that: the above embodiments are only for illustrating the technical aspects of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those of ordinary skill in the art that: modifications and equivalents may be made to the specific embodiments of the invention without departing from the spirit and scope of the invention, which is intended to be covered by the claims.
Claims (6)
1. A dual polarized microstrip parasitic array antenna of a tilt beam, said antenna comprising: the coaxial line feed type electromagnetic wave excitation device comprises a dielectric substrate, a metal floor, a 50 omega coaxial line feed, a curved microstrip line and a plurality of circular ring-shaped excitation patches;
The metal floor is arranged on the lower surface of the dielectric substrate, two 50 omega coaxial line feeds are arranged on the lower surface of the metal floor, one end of each of two curved microstrip antennas symmetrically arranged on the upper surface of the dielectric substrate is respectively connected with one 50 omega coaxial line feed, and the other end of each of the two curved microstrip antennas is connected with the nearest annular excitation patch;
The circular ring type excitation patches are arranged on the upper surface of the dielectric substrate at equal intervals, and the inner diameters and the outer diameters of the circular ring type excitation patches are sequentially reduced from the nearest to the curved microstrip antenna to the far from the curved microstrip antenna.
2. The dual polarized microstrip parasitic array antenna of a tilt beam of claim 1 wherein said curved microstrip antennas each comprise a circular patch, a first connection patch and a second connection patch connected in sequence;
The circular patch is connected with a 50 omega coaxial line feed, and the second connecting patch is connected with the circular excitation patch;
The joint of the first connecting patch and the second connecting patch forms a first included angle, and the second connecting patch forms a second included angle with the y axis;
the second connecting patch is gradually increased in width from one end close to the first connecting patch to one end close to the annular excitation patch.
3. The dual polarized microstrip parasitic array antenna of a tilt beam of claim 2 wherein the dielectric substrate has a length L of 113mm, a width W of 44mm, and a total thickness h of the dielectric substrate and the metal floor of 4mm;
The spacing width g between the annular excitation patches is 1.5mm.
4. The dual polarized microstrip parasitic array antenna of claim 3 wherein said first included angle is 60 ° and said second included angle is 45 °;
the length of the first connection patch is 7.16mm, and the length of the second connection patch is 5.20mm.
5. The dual polarized microstrip parasitic array antenna of a tilt beam of claim 4 wherein the ratio R i2/Ri1 =0.55 of the inner radius R i2 and the outer radius R i1 of said circular annular excitation patch.
6. The dual polarized microstrip parasitic array antenna of a oblique beam of claim 5 wherein said circular excitation patch is 5, the specific parameters are designed as follows:
The outer diameters of the first circular strips of the first to fifth circular excitation patches are respectively: r 11＝9.65mm、R21＝9.40mm、R31＝9.07mm、R41 =8.57 mm and R 51 =6.92 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410455215.6A CN118156790A (en) | 2024-04-16 | 2024-04-16 | Dual-polarized microstrip parasitic array antenna with inclined beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410455215.6A CN118156790A (en) | 2024-04-16 | 2024-04-16 | Dual-polarized microstrip parasitic array antenna with inclined beam |
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| Publication Number | Publication Date |
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| CN118156790A true CN118156790A (en) | 2024-06-07 |
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| CN202410455215.6A Pending CN118156790A (en) | 2024-04-16 | 2024-04-16 | Dual-polarized microstrip parasitic array antenna with inclined beam |
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