CN114976622A - quasi-Taiji-shaped dual-frequency microstrip patch antenna loaded with eight-diagram-shaped parasitic patches - Google Patents
quasi-Taiji-shaped dual-frequency microstrip patch antenna loaded with eight-diagram-shaped parasitic patches Download PDFInfo
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- 238000013461 design Methods 0.000 claims abstract description 16
- 241000251468 Actinopterygii Species 0.000 claims description 12
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- 238000005530 etching Methods 0.000 description 2
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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
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/10—Resonant antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/20—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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—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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- 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
- H01Q5/378—Combination of fed elements with parasitic elements
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Abstract
The invention discloses a quasi-Taiji-shaped dual-frequency microstrip patch antenna loaded with eight-Diagram-shaped parasitic patches, which comprises a dielectric substrate, a radiation patch, a quasi-Taiji-shaped parasitic patch, a ground plate, eight-Diagram-shaped parasitic patches and a coaxial feed inner core, wherein the radiation patch and the quasi-Taiji-shaped parasitic patch form a quasi-Taiji-shaped design, and the eight-Diagram-shaped parasitic patches are printed on the periphery of the quasi-Taiji-shaped parasitic patch on the upper surface of the dielectric substrate. The invention provides a novel antenna design, combines the traditional Chinese 'Tai Chi eight diagrams' with the antenna design, introduces a parasitic patch, realizes the improvement of dual-band, low return loss value and gain, reduces the complexity of the miniaturized design of the antenna, has the advantages of simple manufacture and low cost, provides a new idea for the improvement of the antenna performance and the design of the dual-band antenna, and has the application direction in the field of wireless communication.
Description
Technical Field
The invention relates to the technical field of wireless communication antennas, in particular to a design of a quasi-Taiji-shaped dual-frequency microstrip patch antenna loaded with eight-diagram-shaped parasitic patches.
Background
Microstrip patch antennas are widely used in the fields of wireless communication, satellite positioning and the like due to the characteristics of small size, low profile, low cost and easy integration, but the antennas still have the limitations of low gain, narrow bandwidth, single frequency band and the like in the traditional design. In order to improve the radiation performance of the conventional microstrip patch antenna, intensive research has been conducted on many aspects, such as: the method comprises the steps of radiating patches with different shapes, etching gaps on the radiating patches, etching DGS structures with different shapes on a grounding plate, designing a planar inverted F antenna, designing a meander line-shaped patch antenna, adopting a multi-layer dielectric substrate structure, using a single FSS (frequency selective surface) substrate, and combining and applying the technologies.
Disclosure of Invention
The invention aims to introduce a novel design idea, combines the traditional Tai Ji eight diagrams in China with the antenna design, combines the radiation patch with a unique shape with the similar Tai Ji-shaped parasitic patch and the eight diagrams-shaped parasitic patch, and considers the combination of the traditional Tai Ji eight diagrams in China and the traditional microstrip patch antenna on the premise of not influencing the size and the design complexity of the antenna so as to improve the radiation performance of the antenna in the aspects of return loss, voltage standing wave ratio, bandwidth and gain, thereby providing a novel antenna design for improving the radiation performance.
Technical scheme of the invention
A quasi-Taiji-shaped dual-frequency microstrip patch antenna loaded with eight-Diagram-shaped parasitic patches comprises an antenna ground plate, a dielectric substrate, a radiation patch, a quasi-Taiji-shaped parasitic patch, an eight-Diagram-shaped parasitic patch and a coaxial feed inner core, wherein the ground plate of an ideal thin conductor is arranged on the lower surface of the antenna dielectric substrate, the ground plate is taken as an XY plane, the positive center of the ground plate is taken as a coordinate origin, a number axis which is perpendicular to an XY horizontal tangent plane through the coordinate origin is defined as a Z axis, the positive direction of the Z axis faces forwards along a paper surface, the positive direction of the X axis faces downwards along the paper surface, and the positive direction of the Y axis faces rightwards along the paper surface. The middle part of the upper surface is provided with a radiation patch and a quasi-Taiji parasitic patch which are coupled together to form a quasi-Taiji shape, the special point is that the radiation patch is designed into a structure of a Taiji pattern 'negative fish', the quasi-Taiji parasitic patch is designed into a structure of a 'positive fish' which is symmetrical and complementary with the radiation patch in shape and has the same size, the radiation patch and the quasi-Taiji parasitic patch are both designed into ideal thin conductors, the radiation patch is provided with a coaxial feed inner core and connects the radiation patch and a ground plate together, the microstrip antenna adopts a single feed design, the position of a feed point is not in the center of the structure of the 'negative fish', the microstrip antenna is called as the quasi-Taiji shape design, the periphery of the 'quasi-Taiji' shape of the upper surface of the antenna dielectric substrate is loaded with an 'eight-trigram' structure consisting of 8 trigram-shaped elements, and the eight trigrams have 8 trigrams in total, each divinatory diagram is three divinatory diagram lines parallel to each other, each divinatory diagram line is the connecting line of representing "yang yao" or the broken line with interval of representing "yin yao".
Furthermore, the radiation patch and the quasi-Taiji parasitic patch have the same size and complementary structures.
Furthermore, the radiation patch and the quasi-tai-chi parasitic patch are obtained by performing an adding and subtracting operation on two circles, and the design steps are as follows: taking a circle with the radius of 17.1mm as a circle 1, taking the center of the circle as the origin of coordinates, removing the semi-circle part on the negative side of the Y axis, keeping the semi-circle part on the positive side of the Y axis, taking X as-8.55 as the center of the circle on the X axis, digging a semi-circle with the radius of 8.55mm as a circle 2, and rotating the dug semi-circle around the origin of 180 degrees anticlockwise (or clockwise) and adding the dug semi-circle with the rest of the circle 1 to obtain the radiation patch in the shape of the 'cloudy fish'. The maximum circle radius of the structure is 17.1mm, and the shape of the structure is similar to the ancient Taiji yin-yang fish pattern in China.
Furthermore, the radiation patch and the quasi-Taiji parasitic patch are directly coupled together around the center of the upper surface of the dielectric substrate.
Furthermore, the coaxial feed inner core is arranged as an ideal electric conductor (pec conductor material) in an electromagnetic simulation model, is located at the right center of the antenna and is offset along the X-axis direction, and the offset distance is 5.6 mm.
Furthermore, the eight diagrams parasitic patches have 8 diagrams, and the divinatory diagrams, the heaven diagrams, the divinatory diagrams, the Kanggua, the divinatory diagrams, the Dian diagrams and the Sunda diagrams of the eight diagrams are sequentially and rotatably printed on the upper surface of the dielectric substrate at 45 degrees by taking the center of the dielectric substrate as an origin.
Furthermore, the vertical distance between two adjacent trigram lines of the eight trigram shapes is 1mm, and the size of the communication line is 7mm multiplied by 1 mm; the broken line consists of two broken lines with the size of 3mm multiplied by 1mm, and the horizontal interval between the two broken lines is 1 mm.
Furthermore, the dielectric substrate material adopts Rogers RO4003 with the relative dielectric constant of 3.55 and the loss tangent of 0.0027.
The invention has the advantages and beneficial effects that:
the quasi-Tai Ji-shaped dual-frequency microstrip patch antenna loaded with the eight-diagram-shaped parasitic patch is improved in the aspects of return loss and gain of the antenna, and is low in preparation cost.
Drawings
FIG. 1 is a schematic three-dimensional structure of the present invention.
Fig. 2 is a front view of fig. 1.
FIG. 3 shows the return loss (S) of the present invention 11 ) And (5) simulation results.
Fig. 4 shows the result of Voltage Standing Wave Ratio (VSWR) simulation according to the present invention.
Fig. 5 shows the results of the gain simulation of the present invention.
In the figure: the antenna comprises a dielectric substrate 1, a radiation patch 2, a category 3 Taiji parasitic patch, a grounding plate 4, a eight-diagram parasitic patch 5 and a coaxial feed inner core 6.
Detailed Description
The invention is described in further detail below with reference to the figures and specific embodiments.
Example 1:
the invention provides a quasi-Taiji-shaped dual-frequency microstrip patch antenna loaded with eight-Diagram-shaped parasitic patches, which comprises a dielectric substrate 1, wherein a ground plate 4 is arranged on the lower surface of the dielectric substrate 1, a radiation patch 2 and a quasi-Taiji-shaped parasitic patch 3 which are coupled together to form a quasi-Taiji shape are arranged in the middle of the upper surface of the dielectric substrate 1, a coaxial feed inner core 6 is arranged on the radiation patch 2, and an eight-Diagram-shaped parasitic patch 5 is loaded on the periphery of the quasi-Taiji-shaped upper surface of the dielectric substrate 1.
The radius of the circular patch of the microstrip patch antenna with the main resonant frequency of 2.45GHz is calculated and obtained to be 17.1mm by the radiation patch 2 according to a radius calculation formula designed by the circular microstrip patch antenna, so that a negative fish part (the specific design steps are referred to as the invention content part) in a quasi-Taiji figure formed by compounding a large circle with the radius of 17.1mm and a small circle with the radius of 8.55mm is adopted as a quasi-Taiji parasitic patch 3 by the radiation patch 2, and the radiation patch 2 and the quasi-Taiji parasitic patch 3 are synthesized into a quasi-Taiji pattern which is similar to the "Taiji" pattern and are arranged in the middle of the upper surface of the dielectric substrate 1.
In one embodiment of the present invention, as shown in FIG. 2, a Rogers RO4003 of 80mm × 80mm × 5mm is used as the dielectric substrate 1. The radiation patch 2 is set as an ideal thin conductor, the ideal thin conductor is simulated by distributing an ideal conductor boundary condition method to a two-dimensional plane model in simulation software HFSS, the radiuses of circles in the radiation patch 2 are respectively 17.1mm and 8.55mm, and the quasi-Taiji parasitic patch 3 is obtained by clockwise rotating the radiation patch 2 by 180 degrees and has the same size as the radiation patch 2. The eight-diagram parasitic patch 5 is loaded on the dielectric substrate 1, so that the return loss at a low frequency position can be effectively further reduced, and the gain is improved. The coaxial feed inner core 6 is located at the center of the antenna and shifts towards the positive direction of the X axis, the shifting distance is 5.6mm, and the grounding plate 4 is set as an ideal thin conductor.
The eight diagrams parasitic paster 5 is composed of 8 diagrams, in the diagrams, the vertical distance between every two adjacent diagrams is 1mm, the line width of the diagrams is 1mm, the printing shape of the parasitic paster is completely consistent with the 'eight diagrams from the sky', and the 8 diagrams are arranged in the direction of rotating 45 degrees in sequence by taking the center of the antenna as the center of a circle. The distance parameter of the eight-diagram parasitic patch from the center has no influence on the performance, and can be defined by user, in the embodiment, the position of the eight-diagram parasitic patch is 5mm from the edge of the antenna to the outermost metal patch.
The dimension of a connecting line representing the 'yang yao' in the diagram line is 7mm multiplied by 1 mm; the broken line with interval in the diagram shape representing the 'yin yao' is composed of two short stubs, namely broken lines, the line width of the short stub is 1mm, the line length is 3mm, and the horizontal distance between the two short stubs is 1 mm. The eight-diagram parasitic patch 5 has simple structure printing, is composed of a plurality of rectangular parasitic patches, has small complexity and high manufacturability.
The upper end of the coaxial feed inner core 6 is connected with the radiation patch 2, and the lower end is connected with the grounding plate 4 arranged on the lower surface of the medium substrate 1. The radius of the coaxial feed inner core 6 is 0.5mm, and the size of the ground plate 4 is 80mm x 80mm, namely, the ground plate 4 is covered on the lower surface of the whole dielectric substrate 1.
The microstrip patch antenna designed in the invention is simulated, fig. 3 is a return loss simulation result of the microstrip patch antenna, and it can be seen from the figure that the return loss at the low frequency position is far lower than-18.46 dB of the traditional circular patch microstrip patch antenna with the same patch size, and reaches-34.30 dB.
The microstrip patch antenna designed in the invention is simulated, fig. 4 is a Voltage Standing Wave Ratio (VSWR) simulation result of the microstrip patch antenna, and it can be seen from the figure that the voltage standing wave ratio is 1.03 at the main resonant frequency of 2.45GHz, is only 1.6 at 5.00GHz, and is much lower than 2.
The microstrip patch antenna designed in the invention is simulated, fig. 5 is a simulation result of return loss of the microstrip patch antenna, and the maximum gain of the microstrip patch antenna can be seen to be 7.13dB, and the gain of the microstrip patch antenna is partially improved and is 7.02dB higher than that of the traditional circular patch antenna.
The invention adopts the medium substrate 1, the radiation patch 2, the quasi-Taiji-shaped parasitic patch 3, the grounding plate 4, the eight-Diagram-shaped parasitic patch 5 and the coaxial feed inner core 6 to be mutually combined to form the microstrip patch antenna, the quasi-Taiji-shaped parasitic patch 3 with a complementary structure can effectively improve the reflection coefficient, the impedance bandwidth and the realization of dual frequency bands, the parasitic patch printed by the 'eight-Diagram-shaped' pattern can effectively improve the gain of the antenna, and the preparation cost is lower.
In addition to the above-described invention, other embodiments of the invention may be devised, and the changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principles of the invention are intended to be equivalent substitutions and equivalents, which are intended to be included within the scope of the claims of this invention.
Claims (8)
1. A kind of taiji shape dual-frequency microstrip patch antenna of the parasitic patch of loading eight diagrams, characterized by that: the solar cell comprises an earth plate, a dielectric substrate, a radiation patch, a quasi-Taiji parasitic patch, an eight-Diagram parasitic patch and a coaxial feed inner core, wherein the earth plate is arranged on the lower surface of the dielectric substrate, the radiation patch and the quasi-Taiji parasitic patch are coupled together to form a quasi-Taiji shape and are arranged in the middle of the upper surface of the dielectric substrate, the quasi-Taiji parasitic patch and the radiation patch are symmetrically complementary in shape and have the same size, the quasi-Taiji parasitic patch and the radiation patch respectively form a quasi-Taiji-shaped 'negative fish' and a quasi-Taiji-shaped 'positive fish', the eight-Diagram parasitic patch consists of 8 primitive-shaped elements and is loaded on the periphery of the quasi-Taiji-shaped on the upper surface of the dielectric substrate, an 'eight-Diagram' pattern is formed on the upper surface of the dielectric substrate, and the coaxial feed inner core penetrates through the dielectric substrate to connect the radiation patch and the earth plate together, the grounding plate is used as an XY plane, the positive center is used as a coordinate origin, a plurality of axes passing through the coordinate origin and being vertical to an XY horizontal section are defined as a Z axis, the positive direction of the Z axis faces forwards, the positive direction of the X axis faces downwards, and the positive direction of the Y axis faces rightwards.
2. The quasi-Taiji-shaped dual-frequency microstrip patch antenna loaded with the eight-diagram-shaped parasitic patch according to claim 1, wherein: the dielectric substrate is Rogers RO4003 with the thickness of 80mm multiplied by 5mm, the thickness is 5mm, the relative dielectric constant is 3.55, and the loss tangent is 0.0027.
3. The Taiji-like dual-frequency microstrip patch antenna loaded with the eight-diagram-shaped parasitic patch according to claim 1 or 2, wherein: the radiation patch is a 'negative fish' part in a 'Tai Chi' shape, namely a 'negative fish' shaped metal patch distributed on the upper surface of the dielectric substrate along the X-axis positive direction is set as an ideal radiation boundary surface, the shape of the radiation patch is obtained by adding and subtracting two circles, and the design steps are as follows: according to a radius calculation formula designed by a circular microstrip patch antenna, the radius of the circular patch of the microstrip patch antenna with the main resonant frequency of 2.45GHz is 17.1mm through calculation, a circle with the radius of 17.1mm is taken and defined as circle 1, the circle center is taken as a coordinate origin, the semicircle part on the negative side of the Y axis is removed, the semicircle part on the positive side of the Y axis is reserved, the semicircle part on the positive side of the Y axis is cut off, the X is-8.55 on the X axis and is taken as the circle center, the semicircle with the radius of 8.55mm is cut off and defined as circle 2, and the cut-off semicircle is rotated 180 degrees counterclockwise around the origin and is added with the rest circle 1 part to obtain the radiation patch in the shape of a 'cloudy fish'.
4. The quasi-Taiji-shaped dual-frequency microstrip patch antenna loaded with the eight-diagram-shaped parasitic patch according to claim 1, wherein: the area of the grounding plate is 80mm multiplied by 80mm, and the grounding plate is set to be the same ideal radiation boundary condition as the radiation patch.
5. The quasi-Taiji-shaped dual-frequency microstrip patch antenna loaded with the eight-diagram-shaped parasitic patch according to claim 3, wherein: the quasi-Tai Ji-shaped parasitic patch is a positive fish part in a quasi-Tai Ji shape, namely a positive fish-shaped metal patch distributed on the upper surface of the dielectric substrate along the negative direction of an X axis is set as an ideal radiation boundary surface, the quasi-Tai Ji-shaped parasitic patch is identical to the radiation patch in shape, and the quasi-Tai Ji-shaped parasitic patch and the radiation patch are designed in a complementary mode by taking the center of the dielectric substrate as the center of a circle.
6. The quasi-Taiji-shaped dual-frequency microstrip patch antenna loaded with the eight-diagram-shaped parasitic patch according to claim 1, wherein: the parasitic patch in the shape of the eight diagrams is printed on the upper surface of the dielectric substrate completely according to the traditional Chinese 'the eight diagrams from the acquired days', wherein the dimension of a connecting line representing 'yang yao' is 7mm multiplied by 1mm, a broken line representing 'yin yao' is composed of 2 broken lines, each broken line has the dimension of 3mm multiplied by 1mm, and the distance between the two broken lines is 1 mm.
7. The quasi-Taiji-shaped dual-frequency microstrip patch antenna loaded with the eight-diagram-shaped parasitic patch according to claim 6, wherein: the interval between two adjacent lines representing "positive lines" and/or broken lines representing "negative lines" is 1 mm.
8. The quasi-Taiji-shaped dual-frequency microstrip patch antenna loaded with the eight-diagram-shaped parasitic patch according to claim 1, wherein: the center of the coaxial feed inner core is at the position of 5.6mm of positive center of the microstrip patch antenna along the positive direction of the X axis, and the coaxial feed inner core is set as an ideal conductor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210783068.6A CN114976622A (en) | 2022-07-05 | 2022-07-05 | quasi-Taiji-shaped dual-frequency microstrip patch antenna loaded with eight-diagram-shaped parasitic patches |
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| CN202210783068.6A CN114976622A (en) | 2022-07-05 | 2022-07-05 | quasi-Taiji-shaped dual-frequency microstrip patch antenna loaded with eight-diagram-shaped parasitic patches |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102360699A (en) * | 2011-08-26 | 2012-02-22 | 马敬明 | Compound type magnetic subassembly of permanent magnet |
| CN102582833A (en) * | 2012-02-27 | 2012-07-18 | 李海波 | Flying saucer in shape of tai chi |
| CN110854520A (en) * | 2019-11-22 | 2020-02-28 | 湖北汽车工业学院 | K-band metamaterial microstrip antenna based on divinatory symbols |
| CN111600136A (en) * | 2020-07-01 | 2020-08-28 | 福建省汇创新高电子科技有限公司 | High-isolation high-gain large-scale MIMO antenna applied to wireless local area network |
| CN111613875A (en) * | 2020-05-26 | 2020-09-01 | 深圳市共进电子股份有限公司 | Dipole antenna and radio frequency antenna system |
-
2022
- 2022-07-05 CN CN202210783068.6A patent/CN114976622A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102360699A (en) * | 2011-08-26 | 2012-02-22 | 马敬明 | Compound type magnetic subassembly of permanent magnet |
| CN102582833A (en) * | 2012-02-27 | 2012-07-18 | 李海波 | Flying saucer in shape of tai chi |
| CN110854520A (en) * | 2019-11-22 | 2020-02-28 | 湖北汽车工业学院 | K-band metamaterial microstrip antenna based on divinatory symbols |
| CN111613875A (en) * | 2020-05-26 | 2020-09-01 | 深圳市共进电子股份有限公司 | Dipole antenna and radio frequency antenna system |
| CN111600136A (en) * | 2020-07-01 | 2020-08-28 | 福建省汇创新高电子科技有限公司 | High-isolation high-gain large-scale MIMO antenna applied to wireless local area network |
Non-Patent Citations (1)
| Title |
|---|
| HAIYANG ZHANG.ETC: ""A New Design of Metamaterial and Its Effect on the Microstrip Antenna"" * |
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