CN111769356A - Side-fed dual-circular-polarization microstrip antenna - Google Patents
Side-fed dual-circular-polarization microstrip antenna Download PDFInfo
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- CN111769356A CN111769356A CN202010642675.1A CN202010642675A CN111769356A CN 111769356 A CN111769356 A CN 111769356A CN 202010642675 A CN202010642675 A CN 202010642675A CN 111769356 A CN111769356 A CN 111769356A
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 35
- 230000005855 radiation Effects 0.000 claims abstract description 29
- 230000010287 polarization Effects 0.000 claims abstract description 28
- 230000009977 dual effect Effects 0.000 claims abstract description 17
- 230000003071 parasitic effect Effects 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 7
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- 239000011521 glass Substances 0.000 claims description 7
- 239000004593 Epoxy Substances 0.000 claims description 4
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 7
- 238000002955 isolation Methods 0.000 description 5
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 230000009466 transformation Effects 0.000 description 2
- 230000001131 transforming effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
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- 238000010438 heat treatment Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
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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
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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
- H01Q1/50—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
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/08—Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
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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
- H01Q15/242—Polarisation converters
- H01Q15/244—Polarisation converters converting a linear polarised wave into a circular polarised wave
Abstract
The invention discloses a side-fed dual circularly polarized microstrip antenna, which comprises: the antenna comprises a corner cutting radiation patch, a corner cutting parasitic patch, a first conversion strip line, a first open-circuit strip line, a second conversion strip line and a second open-circuit strip line; the corner cut radiation patch and the corner cut parasitic patch are formed by cutting a group of opposite corners of a square patch at an angle of 45 degrees; and respectively laid on the corresponding printed boards and mounted in a stacked manner; one end of each of the first conversion strip line and the second conversion strip line is connected with the central position of two adjacent sides of one corner cut of the corner cut radiation patch; the first open-circuit strip line is connected with the first conversion strip line; and the second open-circuit strip line is connected with the second conversion strip line. The microstrip antenna realizes left and right dual circular polarization on the microstrip antenna by adopting a side feed mode, the feed network is simple, the feed network and the radiation unit of the array can be designed on the same layer, the number of layers of the antenna is less, and the process is simpler and more convenient to realize.
Description
Technical Field
The invention relates to the technical field of antenna circular polarization, in particular to an edge-fed dual-circular polarization microstrip antenna.
Background
The circularly polarized microstrip antenna is in a low-profile antenna form, can widen the bandwidth of the antenna by utilizing the laminated parasitic unit, and is widely applied to engineering. Exciting a pair of degenerate modes by means of angle cutting, slotting and the like on a patch of the microstrip antenna, and generating circular polarization by using a single feed point form; and performing side feeding, back feeding or coupling feeding on two adjacent sides of the linear polarization patch, and synthesizing by using a power divider, thereby forming circular polarization in a double-feed point mode.
The existing dual circular polarization implementation modes mainly comprise four-point feeding and two-point feeding. Schroexin et al in the paper "design of dual circularly polarized microstrip antenna" provide two horizontal and vertical linearly polarized feed points for a microstrip patch, one vertical polarized feed point and one horizontal polarized feed point are synthesized by a power divider with a 90 ° difference, and the other vertical polarized feed point and the other horizontal polarized feed point are synthesized by a power divider with a-90 ° difference, thereby respectively forming left and right hand circular polarization. Shi Xiao et al in the article "a dual circularly polarized satellite communication antenna" provide one feed point for each of horizontal and vertical linear polarizations for a microstrip patch, and synthesize the two feed points into left and right dual circular polarizations by providing a + -90 deg. phase difference through a 3dB bridge. The two ways of realizing double circular polarization by linear polarization synthesis have the advantage that the circuit size occupied by the feed network is larger due to the existence of the power divider and the electric bridge. In the article, "a dual-circular-polarization low-profile broadband microstrip antenna", the introduction and the like adopts two probes for back feeding of an angle-of-cut laminated patch, each probe independently realizes a circular polarization, and the feed position of the probe on the patch is adjusted to realize the performance optimization of impedance matching and left-hand and right-hand circular polarization, but the feed network after the array is formed cannot be designed with a radiation unit at the same layer, and an independent feed network layer must be added, so that the number of layers of the array antenna is too many, and the process implementation is more complex.
Disclosure of Invention
The invention mainly aims to provide a side-feed dual-circular-polarization microstrip antenna which at least partially solves the technical problems, the side-feed mode is adopted to realize left-hand and right-hand dual-circular polarization on the microstrip antenna, the number of antenna layers is less, and the process is simpler and more convenient to realize.
In order to achieve the purpose, the invention adopts the technical scheme that:
an edge-fed dual circularly polarized microstrip antenna comprising: the antenna comprises a corner cutting radiation patch, a corner cutting parasitic patch, a first conversion strip line, a first open-circuit strip line, a second conversion strip line and a second open-circuit strip line;
the corner cut radiation patch and the corner cut parasitic patch are formed by cutting a group of opposite corners of a square patch at an angle of 45 degrees; and respectively laid on the corresponding printed boards and mounted in a stacked manner;
one end of each of the first conversion strip line and the second conversion strip line is connected with the central position of two adjacent sides of one corner cut of the corner cut radiation patch;
the first open-circuit strip line is connected with the first conversion strip line; and the second open-circuit strip line is connected with the second conversion strip line.
In one embodiment, the corner cut radiation patch is laid on the top layer of the first printed board; the corner cutting parasitic patch is laid on the bottom layer of the second printed board;
the top layer of the first printed board and the bottom layer of the second printed board are correspondingly installed according to the corner cutting position.
In one embodiment, the first printed board is a polytetrafluoroethylene glass cloth laminated board with a dielectric constant of 2.75 and a thickness of 1 mm; the second printed board is an epoxy glass cloth board with the dielectric constant of 4.2 and the thickness of 1 mm.
In one embodiment, the antenna has an operating band of 0.95f0～1.05f0，f0Is the center frequency.
In one embodiment, the square patch is 0.35 λ square; the side length of a cutting angle of the cutting angle radiation patch is 0.1 lambda; the length of the corner cut side of the corner cut parasitic patch is 0.07 lambda.
In one embodiment, the first transformation strip line and the first transformation strip line are both the same right-angle broken line, and the line length is 1/4 waveguide wavelengths.
In one embodiment, the first open strip line and the second open strip line are each 0.1 λ in length and are each located near an edge of the corner cut radiating patch.
Compared with the prior art, the invention has the following beneficial effects:
the edge-fed dual-circular-polarization microstrip antenna provided by the embodiment of the invention comprises corner-cut radiation patches and corner-cut parasitic patches which are laid on a printed board and are installed in a stacked mode, wherein the adjacent two edges of one corner cut of the radiation patches are subjected to edge feeding respectively, and impedance conversion and matching are performed through respective conversion strip lines and open-circuit strip lines respectively. The left-handed and right-handed dual circular polarization is realized on the microstrip antenna by adopting a side feed mode, the feed network is simple, the feed network and the radiation unit of the array can be designed on the same layer, the number of antenna layers is small, and the process is simple and convenient to realize.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
In order to more clearly describe the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
Fig. 1 is a structural diagram of an edge-fed dual circularly polarized microstrip antenna provided in an embodiment of the present invention;
fig. 2 is a diagram of a simulation result of return loss and isolation according to an embodiment of the present invention;
fig. 3 is a right-hand polarized radiation pattern (phi 0 deg.) provided by an embodiment of the present invention;
fig. 4 is a right-hand polarized radiation pattern (90 °) provided by an embodiment of the present invention;
FIG. 5 is an axial ratio directional diagram for right hand polarization provided by an embodiment of the present invention;
in the drawings: the antenna comprises a 1-corner cut radiation patch, a 2-corner cut parasitic patch, a 3-first conversion strip line, a 4-first open circuit strip line, a 5-second conversion strip line and a 6-second open circuit strip line.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
As shown in fig. 1, the present invention provides an edge-fed dual circularly polarized microstrip antenna, including: corner cut radiation patch 1, corner cut parasitic patch 2, first conversion strip line 3, first open circuit strip line 4, second conversion strip line 5 and second open circuit strip line 6. The two patches are formed by cutting angles of 45 degrees on a group of opposite angles of a square patch, and are laid on two printed boards respectively and mounted in a laminating mode.
The corner-cut radiation patch 1 is laid on the top layer of the first printed board; the corner cutting parasitic patch 2 is laid on the bottom layer of the second printed board; the top layer of the first printed board and the bottom layer of the second printed board are correspondingly installed according to the corner cutting positions.
One end of a first conversion strip line 3 and one end of a second conversion strip line 5 are respectively connected with the central positions of two adjacent sides of a corner cut of the corner cut radiation patch 1, a first open circuit strip line 4 is connected with the first conversion strip line 3, and a second open circuit strip line 6 is connected with the second conversion strip line 5. The conversion strip line and the open-circuit strip line respectively perform impedance conversion and matching on the patch, so that left-hand and right-hand double circular polarization is formed.
In the embodiment, the left-handed and right-handed dual circular polarizations are realized on the microstrip antenna by adopting the edge feed mode, so that the feed network is simple, the feed network and the radiation unit of the array can be designed on the same layer, the number of layers of the antenna is small, and the process is simple and convenient to realize.
In one embodiment, the first printed board is a polytetrafluoroethylene glass cloth laminated board with a dielectric constant of 2.75 and a thickness of 1 mm; the insulating material is suitable for high-frequency and high-temperature environments and has good insulating property. The second printed board may be an epoxy glass cloth board having a dielectric constant of 4.2 and a thickness of 1 mm. The epoxy glass cloth plate is made by bonding glass fiber cloth with epoxy resin, heating and pressurizing, and has the model of 3240, high mechanical property at medium temperature and stable electrical property at high temperature; has high mechanical and dielectric properties, good heat resistance and moisture resistance. The mechanical performance of the microstrip antenna is enhanced, and the service life can be prolonged.
In one embodiment, the microstrip antenna has an operating band of 0.95f0～1.05f0，f0Is the center frequency. The two square patches are 0.35 lambda in side length; wherein, the side length of the cutting angle radiation patch 1 is 0.1 lambda, and the side length of the cutting angle parasitic patch 2 is 0.07 lambda. The first conversion strip line 3 and the first conversion strip line 5 are both the same rectangular broken line, and the line length is 1/4 waveguide wavelengths.
The first open strip line 4 and the second open strip line 6 have a length of about 0.1 lambda and are located close to the edge of the radiating patch. The combination of the first transforming strip line 3, the first open strip line 4 becomes a right-handed feed line, the combination of the second transforming strip line 5, the second open strip line 6 becomes a left-handed feed line, the left-handed and right-handed feed lines being symmetrical with respect to the radiating patch diagonal where the corner cut is located. The line width of the conversion strip line is adjusted, and the line length and the line width of the open-circuit strip line and the gap between the two ports and the edge of the radiation patch are adjusted, so that the two ports can be matched with 50 omega.
Because the left-hand and right-hand ports have completely symmetrical structures and the performance simulation results of the two ports are similar or even identical, the right-hand polarization result is mainly described below.
As shown in fig. 2, the simulation results of the return loss and the port isolation of the antenna are shown, the abscissa represents the operating frequency, the ordinate represents the return loss and the isolation, the S11 and S22 curves represent the return loss of the left-hand polarization and the right-hand polarization, and the S12 and S21 curves represent the port isolation of the left-hand polarization and the right-hand polarization. In the working frequency band, the return loss of the antenna is less than-10 dB, and the isolation of two ports is greater than 10 dB.
As shown in fig. 3 and 4, the directional diagrams of two orthogonal sections of right-handed polarization are shown, the abscissa represents the azimuth angle, the ordinate represents the gain, and three curves in the diagrams are respectively the three frequency points of low, medium and high frequencies in the working frequency band: 0.95f0、f0、1.05f0The 3dB beam width is 58-66 degrees, and the maximum gain is 8.7-9 dBi.
As shown in fig. 5, the axial ratio directional diagram of right-handed polarization is shown, the abscissa represents the azimuth angle, the ordinate represents the axial ratio, and three curves in the diagram are respectively the low, medium and high frequency points in the working frequency band: 0.95f0、f0、1.05f0It can be seen that the axial ratios in the normal direction are all less than 1.9 dB.
According to the edge-fed dual-circular-polarization microstrip antenna provided by the embodiment of the invention, the left-hand and right-hand dual-circular polarization is realized on the microstrip antenna by adopting an edge-fed mode, the feed network is simple, the feed network and the radiation unit of the array can be designed on the same layer, the number of antenna layers is less, and the process is simpler and more convenient to realize.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (7)
1. The utility model provides a limit is presented two circular polarization microstrip antenna which characterized in that: the method comprises the following steps: the antenna comprises a corner cutting radiation patch (1), a corner cutting parasitic patch (2), a first conversion strip line (3), a first open-circuit strip line (4), a second conversion strip line (5) and a second open-circuit strip line (6);
the corner cutting radiation patch (1) and the corner cutting parasitic patch (2) are formed by cutting a group of opposite corners of a square patch at an angle of 45 degrees; and respectively laid on the corresponding printed boards and mounted in a stacked manner;
one end of each of the first conversion strip line (3) and the second conversion strip line (5) is respectively connected with the central position of two adjacent sides of one corner cut of the corner cut radiation patch (1);
the first open-circuit strip line (4) is connected with the first conversion strip line (3); the second open-circuit strip line (6) is connected with the second conversion strip line (5).
2. An edge-fed dual circularly polarized microstrip antenna according to claim 1 wherein: the corner-cut radiation patch (1) is laid on the top layer of the first printed board; the corner cutting parasitic patch (2) is laid on the bottom layer of the second printed board;
the top layer of the first printed board and the bottom layer of the second printed board are correspondingly installed according to the corner cutting position.
3. An edge-fed dual circularly polarized microstrip antenna according to claim 2 wherein: the first printed board is a polytetrafluoroethylene glass cloth laminated board with the dielectric constant of 2.75 and the thickness of 1 mm; the second printed board is an epoxy glass cloth board with the dielectric constant of 4.2 and the thickness of 1 mm.
4. An edge-fed dual circularly polarized microstrip antenna according to claim 1 wherein: the working frequency band of the antenna is 0.95f0～1.05f0，f0Is the center frequency.
5. An edge-fed dual circularly polarized microstrip antenna according to claim 1 wherein: the side length of the square patch is 0.35 lambda of a square; the length of the cutting angle side of the cutting angle radiation patch (1) is 0.1 lambda; the length of the corner cut side of the corner cut parasitic patch (2) is 0.07 lambda.
6. An edge-fed dual circularly polarized microstrip antenna according to claim 5 wherein: the first conversion strip line (3) and the first conversion strip line (5) are both identical right-angle broken lines, and the line length is 1/4 waveguide wavelength.
7. An edge-fed dual circularly polarized microstrip antenna according to claim 5 wherein: the lengths of the first open-circuit strip line (4) and the second open-circuit strip line (6) are both 0.1 lambda, and the positions of the first open-circuit strip line and the second open-circuit strip line are both close to the edge of the corner-cut radiation patch (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010642675.1A CN111769356A (en) | 2020-07-06 | 2020-07-06 | Side-fed dual-circular-polarization microstrip antenna |
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| CN202010642675.1A CN111769356A (en) | 2020-07-06 | 2020-07-06 | Side-fed dual-circular-polarization microstrip antenna |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112563753A (en) * | 2020-12-08 | 2021-03-26 | 合肥若森智能科技有限公司 | Transmit-receive common-caliber dual-circular-polarization phased-array antenna subarray and antenna |
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| CN105896091A (en) * | 2016-06-07 | 2016-08-24 | 桂林电子科技大学 | Miniaturized broadband high-gain circular polarized microstrip antenna |
| CN209344327U (en) * | 2019-03-19 | 2019-09-03 | 山东雷诚电子科技有限公司 | C-band Broadband Circular Polarization Microstrip Antenna battle array |
| CN110336127A (en) * | 2019-07-15 | 2019-10-15 | 上海矽杰微电子有限公司 | A kind of circular polarization microstrip antenna |
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2020
- 2020-07-06 CN CN202010642675.1A patent/CN111769356A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105896091A (en) * | 2016-06-07 | 2016-08-24 | 桂林电子科技大学 | Miniaturized broadband high-gain circular polarized microstrip antenna |
| CN209344327U (en) * | 2019-03-19 | 2019-09-03 | 山东雷诚电子科技有限公司 | C-band Broadband Circular Polarization Microstrip Antenna battle array |
| CN110336127A (en) * | 2019-07-15 | 2019-10-15 | 上海矽杰微电子有限公司 | A kind of circular polarization microstrip antenna |
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| 傅林著: "《电磁场与电磁波：理论与仿真》", 北京理工大学出版社, pages: 308 - 311 * |
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| CN112563753A (en) * | 2020-12-08 | 2021-03-26 | 合肥若森智能科技有限公司 | Transmit-receive common-caliber dual-circular-polarization phased-array antenna subarray and antenna |
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Application publication date: 20201013 |