CN110676576A - Dual-polarized microstrip antenna - Google Patents
Dual-polarized microstrip antenna Download PDFInfo
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- CN110676576A CN110676576A CN201910956146.6A CN201910956146A CN110676576A CN 110676576 A CN110676576 A CN 110676576A CN 201910956146 A CN201910956146 A CN 201910956146A CN 110676576 A CN110676576 A CN 110676576A
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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
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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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
- 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
- H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
- H01Q1/523—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas between antennas of an array
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/24—Polarising devices; Polarisation filters
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/0006—Particular feeding systems
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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
- H01Q21/061—Two dimensional planar arrays
- H01Q21/065—Patch antenna array
Abstract
The invention discloses a dual-polarized microstrip antenna which mainly comprises a radiation patch main body, a dielectric substrate and a common grounding plate, wherein the dielectric substrate is provided with an upper surface and a lower surface which are oppositely arranged, the radiation patch main body is arranged on the upper surface of the dielectric substrate, and the common grounding plate is arranged on the lower surface of the dielectric substrate.
Description
Technical Field
The invention relates to the field of antenna design, in particular to a dual-polarized microstrip antenna.
Background
In recent years, wireless communication technology has been rapidly developed, and an antenna, which is an important component in a wireless communication system, has a performance that directly affects communication quality of the entire communication system. The dual-polarized antenna is the focus of research.
In many practical applications, antennas are often present in pairs in a transceiving radio system. Since mutual coupling is easy to occur in neighboring antennas, the mutual coupling will deteriorate the transmit-receive isolation of the antennas, reduce the system channel capacity, introduce scanning blind spots, and affect the design accuracy of the system, and generally, methods such as a blocking method, a remote layout, and the like are commonly used in the prior art to inhibit the mutual coupling and improve the antenna isolation, wherein the blocking method mainly blocks the electromagnetic coupling by setting a barrier on the electromagnetic coupling channel; the remote layout can obviously improve the isolation of the antennas mainly by increasing the distance between the antennas; this may increase the size of the antenna, increase the cost, and is not favorable for miniaturization and integration of the antenna.
Disclosure of Invention
The invention mainly aims to provide a dual-polarized microstrip antenna, aiming at solving the problems of inhibiting mutual coupling of the antennas and improving isolation of the antennas under the condition of miniaturization of the structural size.
In order to achieve the above object, the present invention provides a dual-polarized microstrip antenna, comprising a radiation patch body, a dielectric substrate and a common ground plate, wherein the dielectric substrate has an upper surface and a lower surface which are oppositely arranged, the radiation patch body is arranged on the upper surface of the dielectric substrate, the common ground plate is arranged on the lower surface of the dielectric substrate,
the radiation patch main body is square, the radiation patch main body is provided with a first side edge and a second side edge which are adjacent and orthogonal, the dielectric substrate is provided with a first feeding point corresponding to the first side edge of the radiation patch main body and a second feeding point corresponding to the second side edge of the radiation patch main body, and the first feeding point and the second feeding point are respectively coupled and connected with the radiation patch main body through a first microstrip line so as to feed;
the first feeding point and the central connecting line of the radiation patch main body and the second feeding point and the central connecting line of the radiation patch main body form an included angle of 90 degrees.
In an embodiment, the first microstrip line includes a coupling portion disposed near the radiation patch main body and extending along a corresponding side of the radiation patch main body, and an extension portion extending from the coupling portion to the corresponding first and second feeding points.
In an embodiment, the dielectric substrate is provided with metalized through holes corresponding to the first side and the second side of the radiation patch main body, the metalized through hole corresponding to the first side of the radiation patch main body forms the first feeding point, and the metalized through hole corresponding to the second side of the radiation patch main body forms the second feeding point.
In an embodiment, a plurality of metallized semicircular through holes are formed in the peripheral edge of the dielectric substrate, and the metallized semicircular through holes are used for welding the dual-polarized microstrip antenna with an external module.
In one embodiment, the dielectric substrate is square, the center of the radiation patch unit coincides with the center of the surface of the dielectric substrate, and the four corners of the radiation patch unit are aligned to the middle point of each edge line of the dielectric substrate respectively.
In one embodiment, the dual-polarized microstrip antenna comprises a radiation patch body, a dielectric substrate and a common ground plate, wherein the dielectric substrate is provided with an upper surface and a lower surface which are oppositely arranged, the radiation patch body is arranged on the upper surface of the dielectric substrate, the common ground plate is arranged on the lower surface of the dielectric substrate,
the radiation patch main body is square, the radiation patch main body is provided with a first side edge and a second side edge which are adjacent and orthogonal, the dielectric substrate is provided with a first feeding point corresponding to the first side edge of the radiation patch main body and a second feeding point corresponding to the second side edge of the radiation patch main body, and the first feeding point and the second feeding point are respectively fed with the radiation patch main body through a first microstrip line;
the first feeding point and the central connecting line of the radiation patch main body and the second feeding point and the central connecting line of the radiation patch main body form an included angle of 90 degrees;
the radiation patch main body comprises four radiation patch units which are square and have the same side length, namely a first radiation patch unit, a second radiation patch unit, a third radiation patch unit and a fourth radiation patch unit,
the first radiation patch unit, the second radiation patch unit, the third radiation patch unit and the fourth radiation patch unit are distributed on the dielectric substrate in a square matrix;
the first radiation patch unit and the second radiation patch unit are provided with side edges corresponding to the first feed point, and the side edges of the first radiation patch unit and the second radiation patch unit corresponding to the first feed point are connected through a first microstrip line;
the second radiation patch unit and the third radiation patch unit are provided with side edges corresponding to the second feeding point, and the side edges of the second radiation patch unit and the third radiation patch unit corresponding to the second feeding point are connected through the first microstrip line;
the opposite sides of the first radiation patch unit, the second radiation patch unit, the third radiation patch unit and the fourth radiation patch unit are mutually connected through a second microstrip line.
In an embodiment, the middle points of the opposite sides of the first, second, third and fourth radiation patch units are connected to each other through a second microstrip line.
In an embodiment, the first microstrip line includes two impedance matching portions connected to two corresponding radiation patch units in a one-to-one manner, and a connection portion connecting the two impedance matching portions, and the connection portion is connected to the feeding point.
In an embodiment, the impedance matching portion and the connecting portion are both parallel to the side of the corresponding radiation patch unit, the impedance matching portion has one end connected to the connecting portion and one end away from the connecting portion, and the end of the impedance matching portion away from the connecting portion is bent at 90 degrees toward the corresponding radiation patch unit and is connected to the corresponding radiation patch unit; and a chamfer is arranged at the position where the impedance matching part is bent by 90 degrees.
In an embodiment, the first feeding point and/or the second feeding point is/are a metalized via provided on the dielectric substrate through the connection portion.
In an embodiment, a plurality of small metalized through holes are arranged around the first feeding point and/or the second feeding point.
In an embodiment, the dielectric substrate is square, a midpoint of the dielectric substrate coincides with a midpoint of the radiation patch main body, and a side line of the radiation patch main body is parallel to a side line opposite to the dielectric substrate.
According to the dual-polarized microstrip antenna provided by the invention, the radiation patch main body which is square as a whole is arranged on the dielectric substrate, and the two adjacent and orthogonal sides of the radiation patch main body are respectively fed in a microstrip line coupling mode or in a microstrip line connection mode, so that the antenna can be prevented from mutual coupling and the isolation degree is improved under the condition of small structure size. In addition, a dual-polarized antenna with good isolation and high gain can be obtained by arraying the radiation patch main bodies.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a first embodiment of a dual-polarized microstrip antenna according to the present invention;
fig. 2 is a structural diagram of a side view of a first embodiment of the dual-polarized microstrip antenna of the present invention;
fig. 3 is a schematic structural diagram of a second embodiment of the dual-polarized microstrip antenna of the present invention;
fig. 4 is a schematic side view of a dual polarized microstrip antenna according to a second embodiment of the present invention;
fig. 5 is a simulation diagram of isolation S21 parameter of the first embodiment of the dual-polarized microstrip antenna of the present invention;
fig. 6 is a simulation diagram of the gain direction of the first embodiment of the dual-polarized microstrip antenna of the present invention;
fig. 7 is a simulation diagram of isolation S21 parameter of the second embodiment of the dual-polarized microstrip antenna of the present invention;
fig. 8 is a diagram showing a simulation of the gain direction of the second embodiment of the dual polarized microstrip antenna of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides a dual-polarized microstrip antenna which can solve the problems that mutual coupling of the antennas is inhibited and isolation is improved under the condition that the structure size of the antenna is miniaturized.
Referring to fig. 1 and 2, in the first embodiment of the present invention, the dual-polarized microstrip antenna includes a radiation patch body 01, a dielectric substrate 02 and a common ground plate 03, wherein the dielectric substrate 02 has an upper surface and a lower surface which are oppositely disposed, the radiation patch body 01 is disposed on the upper surface of the dielectric substrate 02, the common ground plate 03 is disposed on the lower surface of the dielectric substrate 02,
the radiation patch main body 01 is provided with a first side edge and a second side edge which are adjacent and orthogonal, the dielectric substrate 02 is provided with a first feeding point 04 corresponding to the first side edge of the radiation patch main body 01 and a second feeding point 05 corresponding to the second side edge of the radiation patch main body 01, and the first feeding point 04 and the second feeding point 05 are respectively fed with the radiation patch main body 01 through a first microstrip line 06;
the first feeding point 04 and the central connecting line of the radiation patch main body 01 and the second feeding point 05 and the central connecting line of the radiation patch main body 01 form an included angle of 90 degrees.
In the first embodiment of the present invention, the radiation patch body 01 is square, the square radiation patch can facilitate the implementation of orthogonal dual polarization of the antenna, the symmetry is good, and the symmetry of the square radiation patch can be utilized to facilitate the adjustment of the impedance matching of the dipole, and the adoption of the coupling feeding mode is beneficial to the suppression of cross polarization. Thus, the dual-polarized microstrip antenna in the first embodiment of the present invention has the advantages of suppressing mutual coupling and high isolation.
In the first embodiment of the present invention, the first microstrip line 06 includes a coupling portion 06a disposed near the radiation patch main body 01 and an extension portion 06b extending from the coupling portion 06b to the corresponding first feeding point 04 and second feeding point 05. The coupling part and the extension part of the first microstrip line are combined to form a T shape, wherein the coupling part is a fine microstrip line with the length not exceeding the side length of the radiation patch main body, the extension part has a wider line width than the coupling part, and one end of the extension part, which is positioned at the feed point, is semicircular, so that the antenna effect of the tip end of the microstrip line can be reduced, the scattering can be reduced, and the overall performance index of the dual-polarized microstrip antenna is further enhanced.
In the first embodiment of the present invention, the dielectric substrate 03 is provided with metallized through holes corresponding to the first side and the second side of the radiation patch main body 01, the metallized through hole provided corresponding to the first side of the radiation patch main body 01 forms the first feeding point 04, and the metallized through hole provided corresponding to the second side of the radiation patch main body 01 forms the second feeding point 05. The metallized via can be used to simulate a coaxial probe, facilitating adjustment of impedance matching of the feed interface.
In the first embodiment of the present invention, a plurality of metallized semicircular through holes 07 are provided at the peripheral edge of the dielectric substrate 02, and the metallized semicircular through holes are used for welding the dual-polarized microstrip antenna with an external module.
In the first embodiment of the present invention, the dielectric substrate 02 is square, the center of the radiation patch unit coincides with the center of the surface of the dielectric substrate 02, and the four corners of the radiation patch unit are aligned to the middle point of each edge line of the dielectric substrate 02. Thus, it can be understood that the feed point positions of the dual-polarized microstrip antenna according to the first embodiment of the present invention are disposed on both sides of the dielectric substrate, so that more layout spaces can be provided to the elements in a limited area when the dual-polarized microstrip antenna is integrated with the active circuit module. The dual-polarized microstrip antenna in the first embodiment of the present invention also has symmetry as a whole, and this symmetry can achieve better performance of the antenna.
Referring to fig. 3 and 4, in a second embodiment of the present invention, the dual-polarized microstrip antenna includes a radiation patch body 11, a dielectric substrate 12 and a common ground plate 13, wherein the dielectric substrate 12 has an upper surface and a lower surface which are oppositely disposed, the radiation patch body 11 is disposed on the upper surface of the dielectric substrate 12, the common ground plate 13 is disposed on the lower surface of the dielectric substrate 12,
the radiation patch main body 11 has a first side and a second side which are adjacent and orthogonal, the dielectric substrate 12 is provided with a first feeding point 14 corresponding to the first side of the radiation patch main body 11 and a second feeding point 15 corresponding to the second side of the radiation patch main body 11, and the first feeding point 14 and the second feeding point 15 are respectively fed with the radiation patch main body 11 through a first microstrip line 16;
the first feeding point 14 and the central connecting line of the radiation patch main body 11 and the second feeding point 15 and the central connecting line of the radiation patch main body 11 form an included angle of 90 degrees.
In the second embodiment of the present invention, the radiation patch body 11 includes four radiation patch units, which are square in shape and have the same side length, a first radiation patch unit 111, a second radiation patch unit 112, a third radiation patch unit 113, and a fourth radiation patch unit 114,
the first radiation patch unit 111, the second radiation patch unit 112, the third radiation patch unit 113 and the fourth radiation patch unit 114 are distributed on the dielectric substrate 12 in a square array;
the first radiation patch element 111 and the second radiation patch element 112 have side edges corresponding to the first feeding point 14, and the side edges of the first radiation patch element 111 and the second radiation patch element 112 corresponding to the first feeding point 14 are connected through a first microstrip line 16;
the second radiation patch element 112 and the third radiation patch element 113 have side edges corresponding to the second feeding point 15, and the side edges of the second radiation patch element 112 and the third radiation patch element 113 corresponding to the second feeding point 15 are connected through a first microstrip line 16;
the opposite side edges of the first radiation patch unit 111, the second radiation patch unit 112, the third radiation patch unit 113, and the fourth radiation patch unit 114 are connected to each other through a second microstrip line 17.
In the second embodiment of the present invention, the radiation patch main body is formed by combining four square radiation patch units with the same side length into an antenna square matrix through microstrip lines, the antenna square matrix formed by the four patch units also has the symmetrical property of the square shape as a whole, so that orthogonal dual polarization of the antenna can be conveniently realized, the symmetry is good, bipolar impedance matching can be conveniently adjusted, and the gain of the antenna can be improved by the four patch radiation units. Thus, the dual-polarized microstrip antenna in the second embodiment of the present invention has the advantages of mutual coupling suppression, high isolation, and high gain.
In the second embodiment of the present invention, the middle points of the opposite sides of the first radiation patch unit 111, the second radiation patch unit 112, the third radiation patch unit 113, and the fourth radiation patch unit 114 are connected to each other through the second microstrip line 17. The connection between the two radiating patch elements from the middle point of the side edge can keep good symmetry so as to adjust impedance matching and obtain better antenna performance.
In the second embodiment of the present invention, the first microstrip line 16 includes two impedance matching sections 16a connected to the corresponding two radiating patch elements in a one-to-one manner, and a connection section 16b connecting the two impedance matching sections 16a, and the connection section 16b connects the feeding points. Further, in this embodiment, the two impedance matching portions 16a and the connecting portion 16b are arranged in a straight line and are parallel to the side of the corresponding radiation patch main body 11, the impedance matching portion 16a has one end connected to the connecting portion 16b and one end away from the connecting portion, and one end of the impedance matching portion 16a away from the connecting portion 16b is bent at 90 degrees toward the corresponding radiation patch unit and is connected to the corresponding radiation patch unit; the impedance matching section 16a is provided with a chamfer at a position bent at 90 degrees. Through corner cutting processing, the micro-tip reflection of the microstrip line can be reduced. The impedance matching part is adopted, so that the impedance is adjusted by adjusting the line width of the impedance matching part during design, and better antenna performance indexes are achieved.
In the second embodiment of the present invention, the first feeding point 14 and/or the second feeding point 15 are/is a metalized through hole disposed on the dielectric substrate 12 through the connection portion 16 b. The metallized via can be used to simulate a coaxial probe, facilitating adjustment of impedance matching of the feed interface.
In the second embodiment of the present invention, a plurality of small metallized through holes 18 are arranged around the first feeding point 14 and/or the second feeding point 15. The small metalized through holes arranged in the ring are used for simulating the outer conductor of the coaxial line, so that the anti-interference performance of the feed point can be improved.
In the second embodiment of the present invention, a plurality of metallized semicircular through holes 19 are disposed at the peripheral edge of the dielectric substrate 02, and the metallized semicircular through holes are used for welding the dual-polarized microstrip antenna with an external module.
In the second embodiment of the present invention, the dielectric substrate 12 is square, a midpoint of the dielectric substrate 12 coincides with a midpoint of the radiation patch main body 11, and a side line of the radiation patch main body 11 is parallel to a side line of the dielectric substrate 12 opposite to the side line. Thus, it can be understood that the feed point positions of the dual-polarized microstrip antenna according to the second embodiment of the present invention are disposed on both sides of the dielectric substrate, so that more layout spaces can be provided to the elements in a limited area when the dual-polarized microstrip antenna is integrated with the active circuit module. The dual-polarized microstrip antenna in the second embodiment of the present invention also has symmetry as a whole, and this symmetry can achieve better performance of the antenna.
According to the dual-polarized microstrip antenna provided by the invention, the size parameters of the designed antenna are calculated to initial values according to the theory of the microstrip antenna, then the specific size is determined through further optimization of simulation software, and finally corresponding impedance matching adjustment is carried out according to the actual test result and the final parameter values are determined. In the first and second embodiments, the designed antenna operating center frequency is 5.8GHz, and the double-sided copper-clad FR-4 material board with the thickness of 1mm, the dielectric constant of 4.4 and the dielectric loss tangent of 0.02 is adopted, wherein the length and width of the dielectric substrate in the first embodiment are about 20mm (about 0.4 free space wavelength), and the side length of the square radiation patch unit is 14mm (about 0.5 guided wave wavelength); the dielectric substrate in the second embodiment is 40mm (about 0.8 free space wavelength), the sides of the four square radiation patch elements are 14mm (about 0.5 guided wave wavelength), and the distance from the center of each square radiation patch element to the center of the dielectric substrate is 22 mm. The reference formula for calculating the initial value parameters comprises the following steps:
free space wavelength
Where c is the speed of light, f0Is the working frequency;
guided wave wavelength
Wherein epsiloneIs the equivalent dielectric constant, λ, of the dielectric substrate0Is a free space wavelength;
equivalent dielectric constant of dielectric substrate
Wherein epsilonrH is the relative dielectric constant of the dielectric substrate, h is the thickness of the dielectric substrate, and W is the conduction band width of the microstrip line.
Further, the dual-polarized microstrip antenna of the first embodiment and the dual-polarized microstrip antenna of the second embodiment of the present invention are respectively subjected to an isolation S21 parameter simulation test and a gain direction simulation test;
referring to fig. 5, the dual-polarized microstrip antenna in the first embodiment of the invention has an isolation S21 parameter simulation test value of < -30dB around a center frequency of 5.8 Ghz; referring to fig. 7, the dual-polarized microstrip antenna in the second embodiment of the invention has the parameter simulation test value of separation S21 of < -20dB at the center frequency of 5.8 Ghz. The simulation test results all meet the requirements of most communication equipment on the isolation degree of the antenna.
Referring to fig. 6, in the simulation test of the gain direction, the gain peak values of the dual-polarized microstrip antenna in the first embodiment of the present invention in the dipole direction are all 4.25dBi, and the symmetry of the dipole direction is good; referring to fig. 8, in the simulation test of the gain direction, the gain peak values of the dual-polarized microstrip antenna in the second embodiment of the present invention in the dipole direction are all 6.93dBi, and the dipole direction symmetry is good. It can also be stated that the dual-polarized microstrip antenna in the second embodiment of the present invention can improve the gain of the antenna by using the patch array formed by four radiation patch units as the radiation patch main body.
According to the dual-polarized microstrip antenna provided by the invention, the radiation patch main body is arranged on the dielectric substrate, and the two adjacent and orthogonal sides of the radiation patch main body are respectively fed in a microstrip line coupling mode or in a microstrip line connection mode, so that the antenna can be prevented from mutual coupling and the isolation degree is improved under the condition of small structural size. In addition, a dual-polarized antenna with good isolation and high gain can be obtained by arraying the radiation patch main bodies.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (12)
1. A dual-polarized microstrip antenna is characterized by comprising a radiation patch main body, a dielectric substrate and a common grounding plate, wherein the dielectric substrate is provided with an upper surface and a lower surface which are oppositely arranged, the radiation patch main body is arranged on the upper surface of the dielectric substrate, the common grounding plate is arranged on the lower surface of the dielectric substrate,
the radiation patch main body is square, the radiation patch main body is provided with a first side edge and a second side edge which are adjacent and orthogonal, the dielectric substrate is provided with a first feeding point corresponding to the first side edge of the radiation patch main body and a second feeding point corresponding to the second side edge of the radiation patch main body, and the first feeding point and the second feeding point are respectively coupled and connected with the radiation patch main body through a first microstrip line so as to feed;
the first feeding point and the central connecting line of the radiation patch main body and the second feeding point and the central connecting line of the radiation patch main body form an included angle of 90 degrees.
2. The dual polarized microstrip antenna of claim 1 wherein the first microstrip line comprises a coupling portion disposed proximate to the radiating patch body and extending along a corresponding side of the radiating patch body and an extension portion extending from the coupling portion to the corresponding first and second feed points.
3. The dual polarized microstrip antenna of claim 2 wherein the dielectric substrate has metallized through holes disposed corresponding to the first and second sides of the radiating patch body, respectively, the metallized through hole disposed corresponding to the first side of the radiating patch body constituting the first feeding point, and the metallized through hole disposed corresponding to the second side of the radiating patch body constituting the second feeding point.
4. The dual polarized microstrip antenna of claim 1 wherein the dielectric substrate has a plurality of metallized semicircular through holes at the peripheral edge thereof, the metallized semicircular through holes being used for welding the dual polarized microstrip antenna with an external module.
5. The dual polarized microstrip antenna of any one of claims 2 to 4 wherein the dielectric substrate is square, the center of the radiating patch element coincides with the center of the surface of the dielectric substrate and the four corners of the radiating patch element are aligned with the midpoints of the edges of the dielectric substrate.
6. A dual-polarized microstrip antenna is characterized by comprising a radiation patch main body, a dielectric substrate and a common grounding plate, wherein the dielectric substrate is provided with an upper surface and a lower surface which are oppositely arranged, the radiation patch main body is arranged on the upper surface of the dielectric substrate, the common grounding plate is arranged on the lower surface of the dielectric substrate,
the radiation patch main body is square, the radiation patch main body is provided with a first side edge and a second side edge which are adjacent and orthogonal, the dielectric substrate is provided with a first feeding point corresponding to the first side edge of the radiation patch main body and a second feeding point corresponding to the second side edge of the radiation patch main body, and the first feeding point and the second feeding point are respectively fed with the radiation patch main body through a first microstrip line;
the first feeding point and the central connecting line of the radiation patch main body and the second feeding point and the central connecting line of the radiation patch main body form an included angle of 90 degrees;
the radiation patch main body comprises four radiation patch units which are square and have the same side length, namely a first radiation patch unit, a second radiation patch unit, a third radiation patch unit and a fourth radiation patch unit,
the first radiation patch unit, the second radiation patch unit, the third radiation patch unit and the fourth radiation patch unit are distributed on the dielectric substrate in a square matrix;
the first radiation patch unit and the second radiation patch unit are provided with side edges corresponding to the first feed point, and the side edges of the first radiation patch unit and the second radiation patch unit corresponding to the first feed point are connected through a first microstrip line;
the second radiation patch unit and the third radiation patch unit are provided with side edges corresponding to the second feeding point, and the side edges of the second radiation patch unit and the third radiation patch unit corresponding to the second feeding point are connected through the first microstrip line;
the opposite sides of the first radiation patch unit, the second radiation patch unit, the third radiation patch unit and the fourth radiation patch unit are mutually connected through a second microstrip line.
7. The dual polarized microstrip antenna of claim 6 wherein the midpoints of the sides of the first, second, third and fourth radiating patch elements that are opposite to each other are connected to each other by a second microstrip line.
8. The dual polarized microstrip antenna according to claim 6 wherein the first microstrip line comprises two impedance matching sections connected one-to-one with corresponding two of the radiating patch elements and a connecting section connecting the two impedance matching sections, the connecting section connecting the feeding points.
9. The dual polarized microstrip antenna according to claim 8 wherein the impedance matching section and the connecting section are parallel to the side of the corresponding radiating patch element, the impedance matching section has one end connected to the connecting section and one end away from the connecting section, and the end of the impedance matching section away from the connecting section is bent 90 degrees toward the corresponding radiating patch element and connected to the corresponding radiating patch element; and a chamfer is arranged at the position where the impedance matching part is bent by 90 degrees.
10. A dual polarized microstrip antenna according to claim 6 wherein the first and/or second feed points are metallised vias provided through the connection on the dielectric substrate.
11. A dual polarized microstrip antenna according to claim 10 wherein the first feed point and/or the second feed point is surrounded by a plurality of small metallized through holes.
12. The dual polarized microstrip antenna of any one of claims 6 to 11 wherein the dielectric substrate is square, the midpoint of the dielectric substrate coincides with the midpoint of the radiating patch body, and the edges of the radiating patch body are disposed parallel to the opposing edges of the dielectric substrate.
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| CN201910956146.6A CN110676576B (en) | 2019-10-09 | 2019-10-09 | Dual-polarized microstrip antenna |
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| CN201910956146.6A CN110676576B (en) | 2019-10-09 | 2019-10-09 | Dual-polarized microstrip antenna |
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| CN111934090A (en) * | 2020-06-30 | 2020-11-13 | 西安电子科技大学 | Dual-port dual-polarized filter antenna for realizing miniaturization of radiation patch slow wave and application |
| CN112993535A (en) * | 2021-05-19 | 2021-06-18 | 深圳市中天迅通信技术股份有限公司 | Capsule-based MIMO antenna |
| WO2023028727A1 (en) * | 2021-08-30 | 2023-03-09 | 京东方科技集团股份有限公司 | Antenna and manufacturing method therefor, and communication system |
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| CN102570015A (en) * | 2011-11-18 | 2012-07-11 | 中国船舶重工集团公司第七二四研究所 | Design method of low-profile dual-polarized tile antenna unit adopting T-shaped microstrip feeding |
| CN106329106A (en) * | 2016-10-13 | 2017-01-11 | 哈尔滨工程大学 | Broadband high-isolation low-cross-polarization dual-polarization microstrip antenna array based on SIW technology |
| WO2017055835A1 (en) * | 2015-09-29 | 2017-04-06 | Cambium Networks Ltd | Patch antenna |
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| US20030122715A1 (en) * | 2001-12-27 | 2003-07-03 | Masayoshi Aikawa | Multi-element planar array antenna |
| CN102570015A (en) * | 2011-11-18 | 2012-07-11 | 中国船舶重工集团公司第七二四研究所 | Design method of low-profile dual-polarized tile antenna unit adopting T-shaped microstrip feeding |
| WO2017055835A1 (en) * | 2015-09-29 | 2017-04-06 | Cambium Networks Ltd | Patch antenna |
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| CN111934090A (en) * | 2020-06-30 | 2020-11-13 | 西安电子科技大学 | Dual-port dual-polarized filter antenna for realizing miniaturization of radiation patch slow wave and application |
| CN112993535A (en) * | 2021-05-19 | 2021-06-18 | 深圳市中天迅通信技术股份有限公司 | Capsule-based MIMO antenna |
| WO2023028727A1 (en) * | 2021-08-30 | 2023-03-09 | 京东方科技集团股份有限公司 | Antenna and manufacturing method therefor, and communication system |
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| CN110676576B (en) | 2022-01-18 |
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