CN110783711A - Multi-frequency microstrip slot antenna with ground plate loaded split ring resonator slot - Google Patents
Multi-frequency microstrip slot antenna with ground plate loaded split ring resonator slot Download PDFInfo
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- CN110783711A CN110783711A CN201911102266.6A CN201911102266A CN110783711A CN 110783711 A CN110783711 A CN 110783711A CN 201911102266 A CN201911102266 A CN 201911102266A CN 110783711 A CN110783711 A CN 110783711A
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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
- H01Q13/10—Resonant slot antennas
- H01Q13/106—Microstrip slot antennas
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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
- 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
- H01Q5/28—Arrangements for establishing polarisation or beam width over two or more different 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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Abstract
The invention discloses a multi-frequency microstrip slot antenna with a ground plate loaded with split ring resonator slots, which comprises a metal ground plate, wherein a dielectric substrate is arranged on the upper end surface of the metal ground plate, a rectangular microstrip signal line is arranged on the upper end surface of the dielectric substrate, and the narrow edge of the rectangular microstrip signal line is superposed with one edge of the dielectric substrate; the lower end face of the metal grounding plate is provided with a rectangular radiation gap, the long edge of the rectangular radiation gap is orthogonal to the long edge of the rectangular microstrip signal line, and the two narrow edges of the rectangular radiation gap are symmetrical relative to the connecting line at the centers of the two narrow edges of the rectangular microstrip signal line; the lower end face of the metal grounding plate is also provided with a first split ring resonator gap and a second split ring resonator gap, the first split ring resonator gap is positioned on one side of one end of the rectangular radiation gap, and the second split ring resonator gap is positioned on the other side of the other end of the rectangular radiation gap. The multi-frequency microstrip slot antenna can work at three frequency points simultaneously, can be applied to a wireless mobile communication system, particularly mobile communication equipment, effectively reduces the complexity of the equipment and improves the reliability of the equipment.
Description
Technical Field
The invention belongs to the technical field of microstrip antennas, and particularly relates to a multi-frequency microstrip slot antenna with a ground plate loaded with split ring resonator slots.
Background
The rapid development of information technology brings great convenience to human life and changes the traditional production and life style of people. Particularly, after the fifth generation wireless communication technology with high speed, low delay and large capacity as representative features comes, all things in the society can be accessed to the internet, and the internet of things system is formed by obtaining intelligence or being remotely controlled. Since then, the human society has entered an intelligent and wisdom era. The Internet of things is a network that connects any article with the Internet through Radio Frequency Identification (RFID), infrared sensors, wireless sensing technologies, laser scanners, global positioning systems, and other information sensing devices to perform information exchange and communication, so as to realize intelligent identification, positioning, tracking, monitoring, and management. In the network, the rfid technology is one of the most important article identification and information awareness technologies. The radio frequency identification technology is a non-contact wireless automatic identification technology. It is thus found that many technologies that enable a good life in the future are implemented wirelessly. In a wireless communication system, an antenna is one of the necessary and most important devices, and the performance of the antenna has an important influence on the performance of the whole wireless communication system. The antenna is a basic element of a wireless communication system, and is used for converting high-frequency current in a wire into electromagnetic wave which is spatially propagated or vice versa and converting the electromagnetic wave which is spatially propagated into high-frequency current in the wire.
With the development of wireless communication technology, the degree of intelligence of a reader/writer and an electronic tag in a wireless mobile communication device and an RFID system is higher and higher. For intelligent communication equipment, new functions such as wireless Wi-Fi, bluetooth, intelligent voice, data transmission and the like are continuously integrated, so that the composition of wireless mobile communication equipment is more and more complex, and the wireless communication equipment is continuously developed towards miniaturization under the requirement of portability, so that components of the composed wireless mobile communication equipment are required to complete multiple functions as much as possible, and an antenna is used as a basic component of a wireless communication system, so that the tasks of receiving or transmitting multiple different signals on multiple different frequency points are required to be completed as much as possible.
Microstrip antenna is a kind of antenna structure form widely used in wireless mobile communication equipment in recent years, because it compares dipole antenna, horn antenna type, microstrip antenna has low section, easily with other device integration on the circuit board, easily realize circular polarization, non-omnidirectional radiation, easily conformal, can adopt circuit board printing technology processing, various advantages such as with low costs. However, the existing microstrip antenna has a single working frequency point, and the number of integrated antennas in the intelligent wireless communication equipment is large, so that the reliability of the intelligent wireless mobile communication equipment is low.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a multi-frequency microstrip slot antenna with a ground plate loading split ring resonator slot, which can realize multi-frequency point radiation, reduce the number of integrated antennas in intelligent wireless communication equipment as much as possible and improve the reliability of the intelligent wireless mobile communication equipment.
In order to solve the technical problems, the invention solves the problems by the following technical scheme:
a multi-frequency microstrip slot antenna with a ground plate loaded with split ring resonator slots comprises a metal ground plate, wherein a dielectric substrate is arranged on the upper end surface of the metal ground plate, a rectangular microstrip signal line is arranged on the upper end surface of the dielectric substrate, and the narrow edge of the rectangular microstrip signal line is overlapped with one edge of the dielectric substrate; the lower end face of the metal grounding plate is provided with a rectangular radiation gap, the long edge of the rectangular radiation gap is orthogonal to the long edge of the rectangular microstrip signal line, and the two narrow edges of the rectangular radiation gap are symmetrical relative to the connecting line at the centers of the two narrow edges of the rectangular microstrip signal line; the lower end face of the metal grounding plate is also provided with a first split ring resonator gap and a second split ring resonator gap, the first split ring resonator gap is positioned on one side of one end of the rectangular radiation gap, and the second split ring resonator gap is positioned on the other side of the other end of the rectangular radiation gap; the first split ring resonator gap and the second split ring resonator gap are of a square-shaped structure with equal side length, an opening is formed in one side of an outer frame of the square-shaped structure, an opening is formed in one side, far away from the opening of the outer frame, of the inner frame, and the opening in the outer frame and the opening in the inner frame are arranged in a right-facing mode; the opening on the first split ring resonator gap outer frame is over against one side of the rectangular radiation gap, the first split ring resonator gap is not connected with the rectangular radiation gap, the opening on the second split ring resonator gap outer frame is over against the other side of the rectangular radiation gap, one joint of the opening on the outer frame is connected with the rectangular radiation gap, and the other joint is connected with the inner frame.
Further, the length of the rectangular microstrip signal line is far greater than the width, and the length of the rectangular radiation slot is far greater than the width.
Further, the dielectric substrate is of a square structure, and the size of the metal grounding plate is the same as that of the dielectric substrate.
Furthermore, the middle point of the narrow side of the rectangular microstrip signal line coincides with the middle point of one side of the dielectric substrate, the other three sides of the rectangular microstrip signal line are respectively parallel to the other three sides of the dielectric substrate, and the length of the long side of the rectangular microstrip signal line is greater than half of the side length of the dielectric substrate.
Further, the center of the rectangular radiation slot coincides with the center of the metal ground plate.
Furthermore, the rectangular microstrip signal line is made of copper or silver.
Furthermore, FR4 epoxy resin is adopted as the dielectric substrate, the dielectric constant of FR4 epoxy resin is 4.4 +/-5%, and the loss tangent is 0.02 +/-5%.
Furthermore, the center of the inner frame of the first split ring resonator gap of the square-shaped structure coincides with the center of the outer frame thereof, and the center of the inner frame of the second split ring resonator gap of the square-shaped structure coincides with the center of the outer frame thereof.
Furthermore, the size of the opening in the inner frame of the first split ring resonator gap in the square-shaped structure is the same as that of the opening in the outer frame of the first split ring resonator gap in the square-shaped structure, and the size of the opening in the inner frame of the second split ring resonator gap in the square-shaped structure is the same as that of the opening in the outer frame of the second split ring resonator gap in the square-shaped structure.
Compared with the prior art, the invention has at least the following beneficial effects: the multi-frequency microstrip slot antenna with the ground plate loaded with the split ring resonator slots solves the problem that the working frequency point of the microstrip slot antenna is single, realizes the multi-frequency work of the microstrip slot antenna, and loads two split ring resonator slot structures on two sides of the radiation slot of the microstrip slot antenna, so that the microstrip slot antenna with the double-frequency work is changed into an antenna with three resonance points, the original working frequency point of the antenna is also reduced, and the miniaturization of the antenna is realized. That is, by loading two split ring resonator gaps, radiation can be realized at three different frequency points, respectively f
01＝2.17±3％GHz，f
023.45 ± 3% GHz and f
03The frequency points cover the working frequency band of 5G wireless mobile communication, the working frequency band of WLAN and the working frequency point of radio frequency identification system (RFID), and can complete the transmission of various different data of the intelligent wireless terminal, wherein the relative bandwidth of the second working frequency band reaches 18.8%, the port matching effect is good at the first and third resonant frequency points, and the minimum value of S11 reaches-21.0 +/-5% dB and-24.4 +/-5% dB respectively. In addition, the microstrip slot antenna can generate maximum radiation in two directions perpendicular to the plane of the antenna, and bidirectional radiation is realized.
In a word, the multi-frequency microstrip slot antenna designed by the invention can work at three frequency points simultaneously, can be applied to a wireless mobile communication system, particularly mobile communication equipment, effectively reduces the complexity of the equipment and improves the reliability of the equipment. Meanwhile, the RFID reader-writer can be applied to a reader-writer of an RFID system, so that the reader-writer can realize wireless communication while finishing the radio frequency identification function.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a perspective view of a multi-frequency microstrip slot antenna with a ground plate loaded with split ring resonator slots according to the present invention;
fig. 2 is a side view of a multi-frequency microstrip slot antenna with a ground plate loading split ring resonator slot according to the present invention;
fig. 3 is a back view of the multi-frequency microstrip slot antenna with the ground plate loading split ring resonator slot designed in the present invention;
FIG. 4 is a curve of the change of the reflection coefficient of the port of the multi-frequency microstrip slot antenna with the ground plate loaded with the split ring resonator slots according to the frequency;
FIG. 5 shows a second resonant frequency f of the multi-frequency microstrip slot antenna with a ground plate loaded with split-ring resonator slots according to the present invention
02And 3.45 +/-3% GHz is perpendicular to the far-field radiation pattern on the plane of the signal line.
In the figure: 10-a metallic ground plane; 11-rectangular microstrip signal lines; 12-a first split ring resonator aperture; 13-rectangular radiation slot; 14-a second split ring resonator aperture; 15-dielectric substrate.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. 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.
As shown in fig. 1, fig. 2, and fig. 3, as a specific embodiment of the present invention, a multi-frequency microstrip slot antenna with a ground plate loading a split ring resonator slot includes a metal ground plate 10, a dielectric substrate 15 is disposed on an upper end surface of the metal ground plate 10, and a size of the metal ground plate 10 is the same as a size of the dielectric substrate 15. The dielectric substrate 15 is of a square structure, the dielectric substrate 15 has a certain thickness, the upper end face of the dielectric substrate 15 is provided with a rectangular microstrip signal line 11, the rectangular microstrip signal line 11 is also an excitation feeder line of a slot antenna, the length of the rectangular microstrip signal line 11 is far larger than the width of the rectangular microstrip signal line, the narrow side of the rectangular microstrip signal line 11 is coincided with one edge of the dielectric substrate 15, the middle point of the narrow side of the rectangular microstrip signal line 11 is coincided with the middle point of one side of the dielectric substrate 15, the other three sides of the rectangular microstrip signal line 11 are respectively correspondingly parallel to the other three sides of the dielectric substrate 15, the connecting line of the middle points of the two narrow sides of the rectangular microstrip signal line 11 passes through the center of the upper surface of the dielectric substrate 15, and the length of the long side of the rectangular microstrip signal.
In the embodiment, the dielectric substrate 15 is made of FR4 epoxy resin, the dielectric constant of FR4 epoxy resin is 4.4 ± 5%, the loss tangent is 0.02 ± 5%, and FR4 epoxy resin is a material widely used for processing circuit boards, and has low cost and low price. The rectangular microstrip signal line 11 is made of copper or silver with good conductivity, and the thickness of the rectangular microstrip signal line is negligible.
A rectangular radiation slot 13 is formed in the lower end face of the metal ground plate 10, the length of the rectangular radiation slot 13 is far larger than the width of the rectangular radiation slot 13, the long side of the rectangular radiation slot 13 is orthogonal to the long side of the rectangular microstrip signal line 11, and the two narrow sides of the rectangular radiation slot 13 are symmetrical relative to the connecting line of the centers of the two narrow sides of the rectangular microstrip signal line 11. The center of the rectangular radiation slot 13 coincides with the center of the metal ground plate 10, that is, the intersection point of the connecting line of the midpoints of the two short sides and the connecting line of the two midpoints of the long sides of the rectangular radiation slot 13 is located in the same vertical direction with the center of the upper surface of the square dielectric substrate 15.
As shown in fig. 1, the rectangular microstrip signal line 11 and the rectangular radiating slot 13 on the metal ground plate 10 divide the surface of the square dielectric substrate 15 into four regions, similar to four quadrants in a rectangular coordinate system, when viewed from top to bottom. A first split ring resonator gap 12 and a second split ring resonator gap 14 are respectively and correspondingly loaded on the second quadrant and the fourth quadrant of the metal grounding plate 10. As shown in fig. 1 and fig. 3, that is, the lower end surface of the metal ground plate 10 is further provided with a first split-ring resonator slot 12 and a second split-ring resonator slot 14, the first split-ring resonator slot 12 is located on one side of one end of the rectangular radiation slot 13, and the second split-ring resonator slot 14 is located on the other side of the other end of the rectangular radiation slot 13.
The first split ring resonator gap 12 and the second split ring resonator gap 14 are of a rectangular structure with equal side length, namely the lengths of four sides of an outer frame of the rectangular structure are equal, and the lengths of four sides of the inner frame are equal; the center of the inner frame of the first split ring resonator gap 12 of the square-shaped structure coincides with the center of the outer frame thereof, and the center of the inner frame of the second split ring resonator gap 14 of the square-shaped structure coincides with the center of the outer frame thereof, that is, the distances between the sides of the inner frame of the square-shaped structure and the sides of the outer frame corresponding to the distances are equal.
The opening has been seted up on one side of the font structure frame that returns, and the opening has also been seted up on the one side of keeping away from the frame opening on the inside casing, and the opening on the frame just sets up with the opening on the inside casing. The openings in the inner frame of the first split ring resonator slots 12 of the square-shaped structure are the same as the openings in the outer frame thereof, and the openings in the inner frame of the second split ring resonator slots 14 of the square-shaped structure are the same as the openings in the outer frame thereof. As shown in fig. 1 and 3, the opening on the outer frame of the first split-ring resonator slot 12 faces one side of the rectangular radiation slot 13, but the first split-ring resonator slot 12 is not connected to the rectangular radiation slot 13; the opening on the outer frame of the second split ring resonator gap 14 faces the other side of the rectangular radiation gap 13, one joint of the opening on the outer frame is connected with the rectangular radiation gap 13, and the other joint is connected with the inner frame. As shown in fig. 1, that is, the outer ring openings of the first split ring resonator slot 12 and the second split ring resonator slot 14 are both directed to the rectangular radiation slot 13 on the metallic ground plate 10. Two joints at the opening of the outer ring gap of the second split ring resonator gap 14 in the second area are respectively connected with the inner ring gap and the rectangular radiation gap 13, specifically, the left end joint is connected with the rectangular radiation gap 13, and the right end joint is connected with the inner ring gap.
The invention relates to a method for manufacturing a multi-frequency microstrip slot antenna with a ground plate loaded with split ring resonator slots, which comprises the following steps:
on the upper surface of a square dielectric substrate 15 with the thickness of h and the side length of L, a rectangular metal patch, namely a rectangular microstrip signal line 11 is printed by adopting a circuit board printing technology, and the connecting line of two short sides of the rectangular metal patch passes through the center of the upper surface of the dielectric substrate 15. One short side of the rectangular metal patch coincides with the lower edge of the upper surface of the dielectric substrate 15 and the centers of the two sides also coincide.
The metal structure, namely the metal grounding plate 10 of the antenna, is printed on the whole area of the lower surface of the dielectric substrate 15, and then a rectangular radiation slot 13 is etched at the center position of the metal grounding plate 10, wherein the long side of the rectangular radiation slot 13 is orthogonal to the long side of the rectangular microstrip signal line 11. A second split ring resonator gap 14 is etched above the rectangular radiation gap 13 and on the left of the rectangular microstrip signal line 11, the opening of the second split ring resonator gap 14 faces the rectangular radiation gap 13, one joint of the opening on the outer frame of the second split ring resonator gap 14 is connected with the rectangular radiation gap 13, and the other joint is connected with the inner frame of the second split ring resonator gap. Another first split-ring resonator slot 12 is etched below the rectangular radiation slot 13 and at the right side of the rectangular microstrip signal line 11, and the outer opening of the first split-ring resonator slot 12 is also opposite to the rectangular radiation slot 13.
The square dielectric substrate 15 is made of epoxy resin FR4, and all the metal structures on the upper and lower surfaces of the square dielectric substrate 15 are made of copper or silver.
Based on the above embodiment, a specific example is given as follows:
selecting a square dielectric plate with the thickness h being (1.6 +/-3%) mm, the side length L being (80 +/-5%) mm, and the material FR4 as a dielectric substrate of the antenna, 15 in the figure, printing a copper rectangular metal patch with the length being (60 +/-5%) mm and the width being (4 +/-2%) mm on the upper surface of the dielectric substrate by adopting a circuit board printing technology, 11 in the figure, wherein one short side of the rectangular metal patch is coincided with the lower edge of the upper surface of the dielectric substrate, the centers of the two edges are also coincided, and the connecting line of the central points of the two short sides is parallel to the two long sides of the rectangular metal patch and passes through the central point of the upper surface of the dielectric substrate.
On the whole surface of the dielectric substrate, a copper metal layer is printed, 10 in the figure, and a rectangular radiation gap with the length (50 +/-5%) mm and the width (4 +/-2%) mm is etched near the center of a metal grounding plate on the lower surface of the dielectric substrate, 13 in the figure. The long side of the rectangular radiation slot is orthogonal to the long side of the rectangular metal patch (rectangular microstrip signal line) line on the upper surface.
A split ring resonator gap 14 in the figure, with the width of (2 +/-3%) mm and the distance between the inner gap and the outer gap of (2 +/-3%) mm, is etched on the lower surface of the dielectric substrate above the rectangular radiation gap 13 and on the left of the rectangular microstrip signal line 11. The left side of the split ring resonator gap is 10 +/-4% mm away from the left edge of the upper surface of the dielectric substrate, the lower edge of the split ring resonator gap is 3 +/-2% mm away from the edge of a rectangular radiation gap (13 in the figure), an outer split ring of the split ring resonator gap faces the rectangular radiation gap, the left side of the split ring resonator gap is connected with the rectangular radiation gap 13 through a gap with the width of 1mm, the right end of the split ring resonator gap is connected with an inner split ring gap through a gap with the width of 1 +/-3% mm, and finally, an inner and outer communicated split ring resonator gap communicated with the central main radiation gap (the rectangular radiation gap) is formed.
The lower surface of the dielectric substrate below the rectangular radiation slot 13 and on the right side of the rectangular microstrip signal line 11 is etched with another split ring resonator slot with the width of (2 +/-3%) mm and the internal-external split ring spacing of (2 +/-3%) mm, 12 in the figure. The distance from the right side edge of the split ring resonator gap to the right side edge of the lower surface is also (10 +/-5%) mm, the opening direction of the split ring gap on the outer side also exceeds the rectangular radiation gap 13, and the distance from the upper edge of the split ring resonator gap to the rectangular radiation gap is also (3 +/-2%) mm.
And carrying out simulation analysis on the multi-frequency antenna with the ground plate loaded with the split ring resonator gaps by using special electromagnetic simulation software HFSS. As shown in fig. 4, the port reflection coefficient is plotted against frequency when the geometric parameters of the antenna take a certain value. As can be seen from the figure, the antenna designed by the invention can resonate in three frequency bands, namely 2.08 GHz-2.25 GHz, 3.28 GHz-3.96 GHz and 5.43 GHz-5.87 GHz. The absolute bandwidth of the second frequency band is 0.68 plus or minus 3% GHz, the relative bandwidth reaches 18.8%, and the frequency band completely covers three working frequency bands of 3.40 GHz-3.50 GHz, 3.50 GHz-3.60 GHz and 3.80 GHz-3.90 GHz of a 5G wireless mobile communication system which is commercially available in China at present. The third resonance frequency point bandwidth covers the working frequency of the current microwave frequency band RFID system in China, and is 5.725 GHz-5.875 GHz.
Fig. 5 shows the far-field radiation pattern of the designed antenna parallel to the plane direction of the main radiation slot (rectangular radiation slot) at the frequency point f of 3.45 ± 3% GHz. As can be seen from fig. 5, the antenna is capable of producing maximum radiation in both directions perpendicular to the plane of the antenna. In a word, the microstrip slot antenna with the ground plate loaded split ring resonator slot structure is a planar antenna with three working frequency points and two maximum radiation directions.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. The utility model provides a multifrequency microstrip slot antenna of ground plate loading split ring resonator gap which characterized in that: the antenna comprises a metal grounding plate (10), wherein a dielectric substrate (15) is arranged on the upper end face of the metal grounding plate (10), a rectangular microstrip signal line (11) is arranged on the upper end face of the dielectric substrate (15), and the narrow side of the rectangular microstrip signal line (11) is superposed with one side of the dielectric substrate (15); a rectangular radiation slot (13) is formed in the lower end face of the metal grounding plate (10), the long side of the rectangular radiation slot (13) is orthogonal to the long side of the rectangular microstrip signal line (11), and the two narrow sides of the rectangular radiation slot (13) are symmetrical relative to the connecting line of the centers of the two narrow sides of the rectangular microstrip signal line (11); the lower end face of the metal grounding plate (10) is further provided with a first split ring resonator gap (12) and a second split ring resonator gap (14), the first split ring resonator gap (12) is located on one side of one end of the rectangular radiation gap (13), and the second split ring resonator gap (14) is located on the other side of the other end of the rectangular radiation gap (13); the first split ring resonator gap (12) and the second split ring resonator gap (14) are of a square-shaped structure with equal side length, an opening is formed in one side of an outer frame of the square-shaped structure, an opening is formed in one side, far away from the opening of the outer frame, of the inner frame, and the opening in the outer frame and the opening in the inner frame are arranged oppositely; the opening on the outer frame of the first split ring resonator gap (12) is over against one side of the rectangular radiation gap (13), the first split ring resonator gap (12) is not connected with the rectangular radiation gap (13), the opening on the outer frame of the second split ring resonator gap (14) is over against the other side of the rectangular radiation gap (13), one joint of the opening on the outer frame is connected with the rectangular radiation gap (13), and the other joint is connected with the inner frame.
2. The multi-frequency microstrip slot antenna with ground plate loading split ring resonator slots of claim 1, wherein: the length of the rectangular microstrip signal line (11) is far larger than the width, and the length of the rectangular radiation slot (13) is far larger than the width.
3. The multi-frequency microstrip slot antenna with ground plate loading split ring resonator slots of claim 1, wherein: the dielectric substrate (15) is of a square structure, and the size of the metal grounding plate (10) is the same as that of the dielectric substrate (15).
4. The multi-frequency microstrip slot antenna with ground plate loading split ring resonator slots of claim 3, wherein: the middle point of the narrow side of the rectangular microstrip signal line (11) is superposed with the middle point of one side of the medium substrate (15), the other three sides of the rectangular microstrip signal line (11) are correspondingly parallel to the other three sides of the medium substrate (15), and the length of the long side of the rectangular microstrip signal line (11) is greater than half of the side length of the medium substrate (15).
5. The multi-frequency microstrip slot antenna with ground plate loading split ring resonator slots of claim 3, wherein: the center of the rectangular radiation gap (13) is coincident with the center of the metal grounding plate (10).
6. The multi-frequency microstrip slot antenna with ground plate loading split ring resonator slots of claim 1, wherein: the rectangular microstrip signal line (11) is made of copper or silver.
7. The multi-frequency microstrip slot antenna with ground plate loading split ring resonator slots of claim 1, wherein: the medium substrate (15) is made of FR4 epoxy resin, the dielectric constant of FR4 epoxy resin is 4.4 +/-5%, and the loss tangent is 0.02 +/-5%.
8. The multi-frequency microstrip slot antenna with ground plate loading split ring resonator slots of claim 1, wherein: the center of the inner frame of the first split ring resonator gap (12) of the square-shaped structure is coincided with the center of the outer frame of the first split ring resonator gap, and the center of the inner frame of the second split ring resonator gap (14) of the square-shaped structure is coincided with the center of the outer frame of the second split ring resonator gap.
9. The multi-frequency microstrip slot antenna with ground plate loading split ring resonator slots of claim 1, wherein: the size of an opening on the inner frame of the first split ring resonator gap (12) in the square-shaped structure is the same as that of an opening on the outer frame of the first split ring resonator gap, and the size of an opening on the inner frame of the second split ring resonator gap (14) in the square-shaped structure is the same as that of an opening on the outer frame of the second split ring resonator gap.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN112751172A (en) * | 2020-12-25 | 2021-05-04 | 电子科技大学 | High-gain directional radiation double-frequency receiving antenna for collecting radio frequency energy |
| CN113346244A (en) * | 2021-05-18 | 2021-09-03 | 深圳市信维通信股份有限公司 | Dielectric resonator antenna and communication equipment |
| CN114156645A (en) * | 2022-02-10 | 2022-03-08 | 北京理工大学前沿技术研究院 | Novel Beidou slot RDSS antenna and etching method |
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