CN113097723A - Broadband dual-frequency circularly polarized half-annulus monopole patch antenna - Google Patents
Broadband dual-frequency circularly polarized half-annulus monopole patch antenna Download PDFInfo
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- CN113097723A CN113097723A CN202110369683.8A CN202110369683A CN113097723A CN 113097723 A CN113097723 A CN 113097723A CN 202110369683 A CN202110369683 A CN 202110369683A CN 113097723 A CN113097723 A CN 113097723A
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- monopole patch
- ground plane
- monopole
- dielectric substrate
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- 230000005404 monopole Effects 0.000 title claims abstract description 68
- 239000000758 substrate Substances 0.000 claims abstract description 46
- 239000002344 surface layer Substances 0.000 claims abstract description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 239000004593 Epoxy Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000002356 single layer Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000004088 simulation Methods 0.000 description 12
- 238000005259 measurement Methods 0.000 description 9
- 230000005855 radiation Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000010287 polarization Effects 0.000 description 6
- 239000004020 conductor Substances 0.000 description 5
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 230000000191 radiation effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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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
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
- H01Q9/0428—Substantially flat resonant element parallel to ground plane, e.g. patch antenna radiating a circular polarised wave
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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
-
- 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
-
- 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
- H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
- H01Q5/28—Arrangements for establishing polarisation or beam width over two or more different wavebands
-
- 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
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
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Abstract
The invention discloses a broadband double-frequency circularly polarized half-annulus monopole patch antenna which comprises a medium substrate, wherein a half-annulus monopole patch and a rectangular monopole patch are arranged on the upper surface layer of the medium substrate, the bottom of the half-annulus monopole patch is connected with the left side edge of the middle upper part of the rectangular monopole patch, the rectangular monopole patch vertically extends upwards from the bottom of the medium substrate, a first rectangular ground plane and a second rectangular ground plane are arranged on the lower surface layer of the medium substrate, the first rectangular ground plane is positioned at the lower part of the lower surface of the medium substrate, the second rectangular ground plane is positioned at the lower surface of the right upper corner of the medium substrate, and the first rectangular ground plane and the second rectangular ground plane are vertically arranged. The Circularly Polarized (CP) antenna is realized by adding the semi-annular strip monopole and the rectangular part for grounding, the maximum gain of the microstrip antenna can respectively reach 4.2dBi and 3.1dBi, and the return loss, standing wave and direction performance of the microstrip antenna can reach good effects.
Description
Technical Field
The invention belongs to the technical field of antennas, and particularly relates to a broadband dual-frequency circularly polarized half-girdle monopole patch antenna.
Background
The main body of the microstrip antenna is a dielectric substrate with the thickness far smaller than the working wavelength, one surface of the substrate is attached with a metal radiating sheet, and the other surface of the substrate is completely coated with a metal thin layer to be used as a grounding plate. A central conductor strip is produced on one face of a dielectric substrate and conductor planes are produced on both sides of the immediate vicinity of the central conductor strip, thus forming a coplanar waveguide, also called a coplanar microstrip transmission line. Coplanar waveguides propagate TEM waves without a cut-off frequency. Because the central conductor strip and the conductor plane are positioned in the same plane, it is convenient to install components on the coplanar waveguide in parallel, and a monolithic microwave integrated circuit with the transmission line and the components on the same side can be manufactured by using the coplanar waveguide.
The dielectric substrate is usually made of insulating material, and the metal radiating plate and the ground plate are made of metal. In the design, the radiation sheet can be designed into different shapes according to different requirements according to different environments, working frequencies and application technologies. The coplanar waveguide has the advantages of small volume, light weight and planar structure, so that the coplanar waveguide is convenient for obtaining linear polarization, circular polarization, dual polarization, multi-band operation and the like, and the advantages enable the coplanar waveguide to be widely applied to modern wireless communication.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a broadband dual-frequency circularly polarized half-band monopole patch antenna aiming at the defects of the prior art, the broadband dual-frequency circularly polarized half-band monopole patch antenna can realize Circular Polarization (CP), has higher gain, and can cover 2.4/5.8GHz WLAN and 2.5GHz WiMAX.
In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a broadband dual-frenquency circular polarization half-ring area monopole paster antenna, includes the medium base plate, the upper surface of medium base plate is equipped with half-ring monopole paster and rectangle monopole paster, the bottom of half-ring monopole paster is connected with the well upper portion left side of rectangle monopole paster, rectangle monopole paster upwards extends perpendicularly from the bottom of medium base plate, the lower top layer of medium base plate is equipped with first rectangle ground plane and second rectangle ground plane, first rectangle ground plane is located the lower part of medium base plate lower surface, second rectangle ground plane is located the lower surface in medium base plate upper right corner, first rectangle ground plane and the perpendicular setting of second rectangle ground plane.
As a further improved technical scheme of the invention, the medium substrate adopts a single-layer FR-4 epoxy substrate, and the relative dielectric constant of the medium substrate is 4.4.
As a further improved technical scheme of the invention, the semi-annular monopole patch, the rectangular monopole patch, the first rectangular ground plane and the second rectangular ground plane are made of copper materials.
As a further improved technical scheme of the invention, the length of the dielectric substrate is 50mm, the width of the dielectric substrate is 35mm, and the thickness of the dielectric substrate is 1.6 mm.
According to the technical scheme, the radius of the outer circle of the semi-annular monopole patch is 9mm, the radius of the inner circle of the semi-annular monopole patch is 7mm, and the central angle of the semi-annular monopole patch is 130 degrees; the rectangular monopole patch is 22.2mm in length and 2.96mm in width, and the distance between the left side of the rectangular monopole patch and the left side of the dielectric substrate is 11.5 mm.
As a further improved technical scheme of the invention, the distance between the bottom of the connecting position of the semi-annular monopole patch and the rectangular monopole patch and the bottom of the dielectric substrate is 19 mm.
As a further improved technical solution of the present invention, the length of the first rectangular ground plane is 35mm, the width of the first rectangular ground plane is 16mm, the length of the second rectangular ground plane is 33.5mm, the width of the second rectangular ground plane is 11mm, and a gap between the first rectangular ground plane and the second rectangular ground plane is 0.5 mm.
Compared with the prior art, the invention has the beneficial effects that: by adding the design of the semi-annular monopole patch, the rectangular monopole patch, the first rectangular ground plane and the second rectangular ground plane, the antenna can realize Circular Polarization (CP), the maximum gain respectively reaches 4.2dBi and 3.1dBi under two working frequency bands of 85MHz (2.454-2.539 GHz) and 370MHz (5.21-5.97 GHz) of 3dB axial ratio bandwidth (axial ratio bandwidth), and the return loss, standing wave and direction performance of the antenna reach good effects. The WLAN which can cover 2.4/5.8GHz and the WiMAX which can cover 2.5GHz can be used for a wireless communication system.
Drawings
Fig. 1 is a schematic plan view of a microstrip antenna of the present invention.
Fig. 2 is a schematic side view of a microstrip antenna of the present invention.
Fig. 3 is a simulation measurement diagram of return loss of the microstrip antenna of the present invention.
Fig. 4 is a simulation measurement diagram of the gain of the microstrip antenna of the present invention.
Fig. 5 (a) is a simulation measurement diagram of the E-plane of the microstrip antenna of the present invention in the gain direction of 2.4 GHz.
Fig. 5 (b) is a simulation measurement diagram of the H-plane of the microstrip antenna of the present invention in the 2.4GHz gain direction.
Fig. 6 (a) is a simulation measurement diagram of the E-plane of the microstrip antenna of the present invention in the 5.8GHz gain direction.
Fig. 6 (b) is a simulation measurement diagram of the H-plane of the microstrip antenna of the present invention in the 5.8GHz gain direction.
In the figure: 1. a dielectric substrate; 2. a first rectangular ground plane; 3. a second rectangular ground plane; 4. a rectangular monopole patch; 5. a semi-annular monopole patch.
Detailed Description
The following further description of embodiments of the invention is made with reference to the accompanying drawings:
as shown in fig. 1, the present embodiment provides a wideband dual-frequency circularly polarized half-band monopole patch antenna, including a dielectric substrate 1, the upper surface of the dielectric substrate 1 is printed with a radiating strip, which is a half-ring monopole patch 5 and a rectangular monopole patch 4, respectively, the bottom of the half-ring monopole patch 5 is connected with the upper-middle left side of the rectangular monopole patch 4, and the rectangular monopole patch 4 extends vertically upward from the bottom of the dielectric substrate 1. The lower surface layer of the dielectric substrate 1 is provided with a first rectangular ground plane 2 and a second rectangular ground plane 3, the first rectangular ground plane 2 is located at the lower part of the lower surface of the dielectric substrate 1, the second rectangular ground plane 3 is located at the lower surface of the upper right corner of the dielectric substrate 1, the first rectangular ground plane 2 and the second rectangular ground plane 3 are arranged in a mutually perpendicular mode, and the monopole rectangular ground plane forms an orthogonal phase to form a CP characteristic.
In this embodiment, the dielectric substrate 1 is a single-layer FR-4 epoxy substrate, and has a relative dielectric constant of 4.4.
In this embodiment, the radiating strips are printed on the upper surface layer of the dielectric substrate 1, fed by microstrip lines, and have a sickle shape.
In this embodiment, the semi-ring monopole patch 5, the rectangular monopole patch 4, the first rectangular ground plane 2, and the second rectangular ground plane 3 are made of copper materials.
In the present embodiment, as shown in fig. 1 and 2, the dielectric substrate 1 has a length L of 50mm, a width W of 35mm, and a thickness h of 1.6 mm.
In this embodiment, as shown in fig. 1, the outer circle radius r of the semi-annular monopole patch 51Is 9mm, and the inner circle radius r27mm, central angle θ is 130 ℃; the length l of the rectangular monopole patch 4fIs 22.2mm and has a width wfThe thickness of the rectangular monopole patch 4 is 2.96mm, and the distance j between the left side edge of the rectangular monopole patch 4 and the left side edge of the dielectric substrate 1 is 11.5 mm.
In this embodiment, a distance m between the bottom of the connection position of the semi-annular monopole patch 5 and the rectangular monopole patch 4 and the bottom of the dielectric substrate 1 is 19 mm.
In this embodiment, the length W of the first rectangular ground plane 2 is 35mm, and the width l thereofg16mm, the length l of the second rectangular ground plane 3cIs 33.5mm and has a width wcThe gap g between the first rectangular ground plane 2 and the second rectangular ground plane 3 is 11mm, and is 0.5 mm.
The antenna realizes CP performance by adding the semi-annular monopole patch 5, the rectangular monopole patch 4, the first rectangular ground plane 2 and the second rectangular ground plane 3. The antenna has been fabricated and measured to dimensions of 30mm x 50mm x 1.6 mm. The measurement results show that the 10dB impedance bandwidth is 1.16GHz2.26-3.42GHz and 2.12GHz5.58-7.7 GHz. The simulated 3dB axial ratio bandwidth is 85MHz2.454-2.539GHz and 370MHz5.21-5.97 GHz. The measured peak gain is about 4.2/3.1dBi, the antenna provides wide impedance bandwidth and narrow axial ratio bandwidth, and the design can help 2.4/5.8GHz WLAN and 2.5GHz WiMAX systems.
As shown in fig. 3 and 4, the simulated and measured return loss and gain results show that the measured impedance bandwidth is 1160MHz resonant at 2.44GHz and 2120MHz resonant at 5.8 GHz. The IMBW becomes wider at the lower band, combining the middle and upper bands into a single wideband. The simulated and measured gain performance is shown in fig. 4. In the two working frequency bands, the antenna gains reach 4.2dBi and 3.1dBi respectively.
As shown in fig. 5, the far-field normalized gain radiation pattern of the simulation measurement at 2.4GHz, in fig. 5, (a) represents the E-plane pattern, and it can be seen that the E-plane can almost achieve the full radiation; fig. 5 (b) shows an H-plane directional pattern, and both the H-plane experimental result and the simulation result can achieve full-area radiation. The radiation effects of the E plane and the H plane are good, and the test result is well matched with the simulation result.
As shown in fig. 6, a far-field normalized gain radiation pattern of simulation measurement at 5.8GHz, where (a) in fig. 6 represents an E-plane pattern, it can be seen that the E-plane can also achieve almost full radiation; fig. 6 (b) shows an H-plane directional pattern, and both H-plane simulation results and experiment results can achieve full-area radiation. The radiation effects of the E plane and the H plane are good, and the test result is well matched with the simulation result.
Compared with a dual-band dual-inductance-loop polarized substrate integrated waveguide antenna of the Coumar K, the low-frequency bandwidth of the antenna is increased by 0.72GHz, the high-frequency bandwidth is increased by 0.08GHz, and the low-frequency 3dB Axial Ratio Bandwidth (ARBW) is increased by 40 MHz. In summary, the antenna can be used in a wireless communication system.
The scope of the present invention includes, but is not limited to, the above embodiments, and the present invention is defined by the appended claims, and any alterations, modifications, and improvements that may occur to those skilled in the art are all within the scope of the present invention.
Claims (7)
1. A broadband dual-frequency circularly polarized half-ring monopole patch antenna is characterized in that: the dielectric substrate comprises a dielectric substrate (1), the upper surface layer of the dielectric substrate (1) is provided with a semi-annular monopole patch (5) and a rectangular monopole patch (4), the bottom of the semi-annular monopole patch (5) is connected with the left side edge of the middle upper part of the rectangular monopole patch (4), the rectangular monopole patch (4) vertically extends upwards from the bottom of the dielectric substrate (1), the lower surface layer of the dielectric substrate (1) is provided with a first rectangular grounding surface (2) and a second rectangular grounding surface (3), the first rectangular grounding surface (2) is located at the lower part of the lower surface of the dielectric substrate (1), the second rectangular grounding surface (3) is located at the lower surface of the right upper corner of the dielectric substrate (1), and the first rectangular grounding surface (2) and the second rectangular grounding surface (3) are vertically arranged.
2. The wideband dual-band circularly polarized half-band monopole patch antenna of claim 1, wherein: the dielectric substrate (1) adopts a single-layer FR-4 epoxy substrate, and the relative dielectric constant of the substrate is 4.4.
3. The wideband dual-band circularly polarized half-band monopole patch antenna of claim 1, wherein: the semi-annular monopole patch (5), the rectangular monopole patch (4), the first rectangular ground plane (2) and the second rectangular ground plane (3) are made of copper materials.
4. The wideband dual-band circularly polarized half-band monopole patch antenna of claim 1, wherein: the length of the dielectric substrate (1) is 50mm, the width is 35mm, and the thickness is 1.6 mm.
5. The wideband dual-band circularly polarized half-band monopole patch antenna of claim 4, wherein: the radius of the outer circle of the semi-annular monopole patch (5) is 9mm, the radius of the inner circle is 7mm, and the central angle is 130 ℃; the length of the rectangular monopole patch (4) is 22.2mm, the width of the rectangular monopole patch is 2.96mm, and the distance between the left side edge of the rectangular monopole patch (4) and the left side edge of the dielectric substrate (1) is 11.5 mm.
6. The wideband dual-band circularly polarized half-band monopole patch antenna of claim 5, wherein: the distance between the bottom of the connecting position of the semi-annular monopole patch (5) and the rectangular monopole patch (4) and the bottom of the dielectric substrate (1) is 19 mm.
7. The wideband dual-band circularly polarized half-band monopole patch antenna of claim 6, wherein: the length of first rectangle ground plane (2) is 35mm, and the width is 16mm, the length of second rectangle ground plane (3) is 33.5mm, and the width is 11mm, the clearance of first rectangle ground plane (2) and second rectangle ground plane (3) is 0.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110369683.8A CN113097723A (en) | 2021-04-07 | 2021-04-07 | Broadband dual-frequency circularly polarized half-annulus monopole patch antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110369683.8A CN113097723A (en) | 2021-04-07 | 2021-04-07 | Broadband dual-frequency circularly polarized half-annulus monopole patch antenna |
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| CN113097723A true CN113097723A (en) | 2021-07-09 |
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| CN202110369683.8A Pending CN113097723A (en) | 2021-04-07 | 2021-04-07 | Broadband dual-frequency circularly polarized half-annulus monopole patch antenna |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040004576A1 (en) * | 2002-07-02 | 2004-01-08 | Anderson Joseph M. | Antenna |
| CN103474765A (en) * | 2013-09-16 | 2013-12-25 | 深圳大学 | Circular polarization crossed dipole antenna and manufacturing method thereof |
| CN205211938U (en) * | 2015-12-15 | 2016-05-04 | 华南理工大学 | Broadband circular polarization microstrip antenna with low axial ratio characteristic |
| CN107623177A (en) * | 2017-09-11 | 2018-01-23 | 西安电子科技大学 | Wideband MIMO antenna based on Unit four |
-
2021
- 2021-04-07 CN CN202110369683.8A patent/CN113097723A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040004576A1 (en) * | 2002-07-02 | 2004-01-08 | Anderson Joseph M. | Antenna |
| CN103474765A (en) * | 2013-09-16 | 2013-12-25 | 深圳大学 | Circular polarization crossed dipole antenna and manufacturing method thereof |
| CN205211938U (en) * | 2015-12-15 | 2016-05-04 | 华南理工大学 | Broadband circular polarization microstrip antenna with low axial ratio characteristic |
| CN107623177A (en) * | 2017-09-11 | 2018-01-23 | 西安电子科技大学 | Wideband MIMO antenna based on Unit four |
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Application publication date: 20210709 |