CN117080747B - Three-frequency-band broadband slot antenna - Google Patents
Three-frequency-band broadband slot antenna Download PDFInfo
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- CN117080747B CN117080747B CN202311337303.8A CN202311337303A CN117080747B CN 117080747 B CN117080747 B CN 117080747B CN 202311337303 A CN202311337303 A CN 202311337303A CN 117080747 B CN117080747 B CN 117080747B
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- 238000004891 communication Methods 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 5
- 239000002184 metal Substances 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000003245 working effect Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
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- 238000000034 method Methods 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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Classifications
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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
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
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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
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- 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
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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
- H01Q5/50—Feeding or matching arrangements for broad-band or multi-band operation
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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
- H01Q9/045—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular feeding means
Abstract
The utility model provides a three-frequency-band broadband slot antenna which comprises a dielectric substrate, a grounding plate, a first inverted U-shaped patch, a second inverted U-shaped patch, a third inverted U-shaped patch, a first microstrip feeder, a second microstrip feeder and a third microstrip feeder which are printed on the upper surface of the dielectric substrate, and a fourth microstrip feeder which is printed on the lower surface of the dielectric substrate. Compared with the prior art, the utility model has the advantages of compact structure, multiple working frequency bands, wide working frequency band and high isolation, and the working frequency band covers 2/3/4/5G, thus being widely applied to various wireless communication scenes.
Description
Technical Field
The utility model relates to the field of communication antennas, in particular to a three-frequency-band broadband slot antenna.
Background
With the development of wireless communication technology and the wide popularization of 5G technology in China, the full coverage of 5G signals is expected to be realized in the near future. In this context, there is also an increasing demand for wireless communication systems. However, the space for placing the wireless communication system is very limited, and if antennas with different operating frequency bands are placed directly together, coupling and mutual interference can occur between the antennas.
In order to solve the above problems, the design of the multiband antenna is becoming a research hotspot. The multi-band antenna can work in different frequency bands, so that space resources are saved greatly, meanwhile, the multi-band antenna is easy to integrate, and the daily wireless communication requirements of people are met while the cost is reduced.
However, the conventional multi-frequency antenna has a relatively narrow operating bandwidth in each of the individual frequency bands, and the frequency bands that can be operated are very limited. The small-sized wide-band three-frequency antenna with coplanar waveguide feed disclosed in Chinese patent publication No. CN209232959U realizes three working frequency bands of 2.2-2.8 GHZ, 3.3-4.0 GHz and 4.9-7.1 GHz through smaller volume; but the relative bandwidths of the three working frequency bands are smaller, and only 24%, 19.18% and 36.67% are respectively adopted. For example, the three-frequency antenna based on CSRR and LHTL disclosed in China patent publication No. CN105006653B uses a complementary split ring resonator and a left-hand transmission line to expand the bandwidth of the antenna, but has relatively complex structure and higher manufacturing cost, and is not beneficial to large-scale popularization and use.
Therefore, how to improve the broadband characteristics of the multi-band antenna, designing a broadband multi-band antenna has important significance for the development of wireless communication technology.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art and provide a three-frequency-band broadband slot antenna which has the advantages of compact structure, multiple working frequency bands and wide working frequency band.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the three-frequency band broadband slot antenna comprises a dielectric substrate, a grounding plate, a first inverted U-shaped patch, a second inverted U-shaped patch, a third inverted U-shaped patch, a first microstrip feeder, a second microstrip feeder and a third microstrip feeder which are printed on the upper surface of the dielectric substrate, and a fourth microstrip feeder which is printed on the lower surface of the dielectric substrate;
the medium substrate is rectangular, the short side of the medium substrate is parallel to the X axis, and the long side of the medium substrate is parallel to the Y axis; the grounding plate is covered on the upper surface of the medium substrate, an inverted U-shaped groove, a first rectangular groove and a second rectangular groove are formed in the grounding plate, the inverted U-shaped groove is formed in the middle of the grounding plate, and the first rectangular groove and the second rectangular groove are arranged in the negative direction of the Y axis of the inverted U-shaped groove and are arranged side by side along the X axis direction;
the first inverted U-shaped patch is arranged in the middle of the inverted U-shaped groove, the second inverted U-shaped patch is arranged in the middle of the first rectangular groove, and the third inverted U-shaped patch is arranged in the middle of the second rectangular groove; the first microstrip feeder, the second microstrip feeder and the third microstrip feeder extend along the Y-axis direction, one ends of the first microstrip feeder, the second microstrip feeder and the third microstrip feeder are respectively connected to the middle parts of the side edges of the first inverted U-shaped patch, the second inverted U-shaped patch and the third inverted U-shaped patch, which are close to the Y-axis negative direction, and the other ends of the first microstrip feeder, the second microstrip feeder and the third microstrip feeder extend to the edges of the short edges of the medium substrate, which are close to the Y-axis negative direction;
the grounding plate is provided with a channel groove for the first microstrip feeder, the second microstrip feeder and the third microstrip feeder to pass through, so that the first microstrip feeder, the second microstrip feeder and the third microstrip feeder are not contacted with the grounding plate;
a rectangular open slot extending along the Y-axis direction is formed in the middle of the side edge of the first inverted U-shaped patch, which is close to the Y-axis positive direction, and a feed through hole is formed in one side of the rectangular open slot, and the feed through hole is arranged on the first inverted U-shaped patch and penetrates through the dielectric substrate;
the fourth microstrip feeder printed on the lower surface of the medium substrate extends along the X-axis direction, one end of the fourth microstrip feeder is arranged at the feed through hole, the other end of the fourth microstrip feeder extends to the other end of the rectangular open slot, and the middle of the fourth microstrip feeder is in cross coupling with the rectangular open slot.
Further, a first vertical open-circuit groove and a second vertical open-circuit groove are also formed in the grounding plate, and the first vertical open-circuit groove and the second vertical open-circuit groove are symmetrical with respect to the middle vertical line of the short side of the dielectric substrate; the first vertical open slot is arranged on the grounding plate between the first rectangular slot and the first microstrip feeder, and the second vertical open slot is arranged on the grounding plate between the second rectangular slot and the first microstrip feeder; one ends of the first vertical open-circuit groove and the second vertical open-circuit groove are respectively communicated with the inverted U-shaped groove, and the other ends of the first vertical open-circuit groove and the second vertical open-circuit groove respectively extend along the Y-axis negative direction.
Further, a first SMA interface, a second SMA interface and a third SMA interface are arranged on the outer side of the medium substrate and are respectively used for feeding the first microstrip feeder, the second microstrip feeder and the third microstrip feeder; the inner conductors of the first SMA interface, the second SMA interface and the third SMA interface are respectively connected with the first microstrip feeder, the second microstrip feeder and the third microstrip feeder, and the outer conductors of the first SMA interface, the second SMA interface and the third SMA interface are respectively connected with the grounding plate;
a fourth SMA interface is arranged at the feed through hole and used for feeding power to a fourth microstrip feeder line; and an inner conductor of the fourth SMA interface passes through the feed through hole to be connected with a fourth microstrip feeder line, and an outer conductor of the fourth SMA interface is connected with the grounding plate.
Further, the first rectangular groove and the second rectangular groove are symmetrical with respect to a short side perpendicular bisector of the dielectric substrate; the second inverted U-shaped patch and the third inverted U-shaped patch are symmetrical with respect to the mid-perpendicular line of the short side of the dielectric substrate; the first microstrip feeder is arranged on the middle perpendicular line of the short side of the medium substrate, and the second microstrip feeder and the third microstrip feeder are symmetrical with respect to the middle perpendicular line of the short side of the medium substrate.
Further, the first inverted U-shaped patch, the second inverted U-shaped patch and the third inverted U-shaped patch are respectively obtained by chamfering a rectangular patch; chamfering is carried out on two corners of the rectangular patch, which are close to the positive direction of the Y axis, so that the overall outline of the rectangular patch is inverted U-shaped, and a first inverted U-shaped patch, a second inverted U-shaped patch and a third inverted U-shaped patch are formed.
Further, the inverted U-shaped groove is obtained by chamfering a rectangular groove; chamfering is carried out on two corners of the rectangular groove close to the positive direction of the Y axis, so that the overall outline of the rectangular groove is inverted U-shaped, and an inverted U-shaped groove is formed.
Further, the dielectric substrate has a dielectric constant of 4.6.
Further, the thickness of the dielectric substrate is 1mm.
The utility model provides a three-frequency-band broadband slot antenna, and provides an inverted U-shaped slot antenna structure of a coplanar waveguide, which is simple in structure and low in manufacturing cost, and the antenna can have a wider working frequency band by only printing a grounding plate and a metal patch on the top of a dielectric substrate and resonating with a slot through the metal patch. Further, two vertical open-circuit grooves symmetrically distributed on the grounding plate can effectively eliminate out-of-band resonance, reduce coupling phenomenon among antennas in different working frequency bands and effectively improve isolation of the antennas.
The three-frequency-band broadband slot antenna provided by the utility model has the effective working frequency bands of 0.698-0.960 GHz, 1.7 GHz-2.7 GHz and 3.3-6 GHz, the relative bandwidths on the three working frequency bands are 31.60%, 45.45% and 58.06%, and the isolation between ports is better than 15dB. The utility model integrates the antennas working in different frequency bands through a shared structure method, so that the antennas can work in three frequency bands. Compared with the prior art, the utility model has the advantages of compact structure, multiple working frequency bands, wide working frequency band and high isolation, and the working frequency band covers 2/3/4/5G, thus being widely applied to various wireless communication scenes.
Drawings
Fig. 1 is a schematic structural diagram of a three-band wideband slot antenna according to an embodiment of the present utility model.
Fig. 2 is a schematic top structure diagram of a three-band wideband slot antenna according to an embodiment of the present utility model.
Fig. 3 is a schematic diagram of a bottom structure of a three-band wideband slot antenna according to an embodiment of the present utility model.
Fig. 4 is a simulation diagram of return loss parameters according to an embodiment of the present utility model.
Fig. 5 is a simulation diagram of antenna isolation according to an embodiment of the present utility model.
Detailed Description
The technical scheme of the utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to 3, the three-band wideband slot antenna provided by the embodiment of the utility model comprises a dielectric substrate 4, a ground plate 3 printed on the upper surface of the dielectric substrate 4, a first inverted U-shaped patch 21, a second inverted U-shaped patch 22, a third inverted U-shaped patch 23, a first microstrip feeder 11, a second microstrip feeder 12 and a third microstrip feeder 13, and a fourth microstrip feeder 14 printed on the lower surface of the dielectric substrate 4.
The dielectric substrate 4 used in the embodiment of the present utility model has a dielectric constant of 4.6, and the thickness of the dielectric substrate 4 is 1mm.
Further, the dielectric substrate 4 is rectangular, the short side of the dielectric substrate is parallel to the X axis, and the long side of the dielectric substrate is parallel to the Y axis; the grounding plate 3 covers the upper surface of the dielectric substrate 4, an inverted U-shaped groove 31, a first rectangular groove 32 and a second rectangular groove 33 are formed in the grounding plate 3, the inverted U-shaped groove 31 is formed in the middle of the grounding plate 3, and the first rectangular groove 32 and the second rectangular groove 33 are arranged in the negative Y-axis direction of the inverted U-shaped groove 31 and are arranged side by side along the X-axis direction;
referring to fig. 2, the first inverted U-shaped patch 21 is disposed in the middle of the inverted U-shaped slot 31, the second inverted U-shaped patch 22 is disposed in the middle of the first rectangular slot 32, and the third inverted U-shaped patch 23 is disposed in the middle of the second rectangular slot 33; the first microstrip feeder 11, the second microstrip feeder 12 and the third microstrip feeder 13 extend along the Y-axis direction, one ends of the first microstrip feeder 11, the second microstrip feeder 12 and the third microstrip feeder 13 are respectively connected to the middle parts of the sides of the first inverted U-shaped patch 21, the second inverted U-shaped patch 22 and the third inverted U-shaped patch 23, which are close to the Y-axis negative direction, and the other ends of the first microstrip feeder 11, the second microstrip feeder 12 and the third microstrip feeder 13 extend to the edges of the short sides of the medium substrate 4, which are close to the Y-axis negative direction;
the grounding plate 3 is provided with a channel groove for the first microstrip feeder 11, the second microstrip feeder 12 and the third microstrip feeder 13 to pass through, so that the first microstrip feeder 11, the second microstrip feeder 12 and the third microstrip feeder 13 are not contacted with the grounding plate 3;
a rectangular open slot 51 extending along the Y-axis direction is formed in the middle of the side edge of the first inverted U-shaped patch 21, which is close to the Y-axis positive direction, a feed through hole 52 is formed in one side of the rectangular open slot 51, and the feed through hole 52 is arranged on the first inverted U-shaped patch 21 and penetrates through the dielectric substrate 4;
referring to fig. 3, a fourth microstrip feeder 14 printed on the lower surface of the dielectric substrate 4 extends along the X-axis direction, one end of the fourth microstrip feeder 14 is disposed at the feed through hole 52, the other end of the fourth microstrip feeder 14 extends to the other end of the rectangular open slot 51, and the middle of the fourth microstrip feeder 14 is cross-coupled with the rectangular open slot 51.
A first SMA interface, a second SMA interface and a third SMA interface are arranged on the outer side of the medium substrate 4 and are respectively used for feeding power to a first microstrip feeder 11, a second microstrip feeder 12 and a third microstrip feeder 13; the inner conductors of the first SMA interface, the second SMA interface and the third SMA interface are respectively connected with the first microstrip feeder line 11, the second microstrip feeder line 12 and the third microstrip feeder line 13, and the outer conductors of the first SMA interface, the second SMA interface and the third SMA interface are respectively connected with the grounding plate 3;
a fourth SMA interface is disposed at the feeding through hole 52, and is used for feeding power to the fourth microstrip feeder 14; the inner conductor of the fourth SMA interface passes through the feed through hole 52 to be connected with the fourth microstrip feeder 14, and the outer conductor of the fourth SMA interface is connected with the ground plate 3.
During feeding, the first microstrip feeder 11, the second microstrip feeder 12, the third microstrip feeder 13 and the grounding plate 3 form a coplanar waveguide together; the first inverted U-shaped patch 21 and the inverted U-shaped groove 31 fed by the first microstrip feeder line 11 generate resonance phenomenon, so that the working effect of the antenna at 1.7-2.7 GHz is realized; the second inverted U-shaped patch 22 fed by the second microstrip feeder 12 and the third inverted U-shaped patch 23 fed by the third microstrip feeder 13 respectively generate resonance phenomena with the first rectangular slot 32 and the second rectangular slot 33, thereby respectively realizing the working effect of the antenna at 3.3-6 GHz; the fourth microstrip feeder 14 and the rectangular open slot 51 generate resonance phenomenon, so as to realize the working effect of the antenna at 0.698-0.960 GHz.
Further, the first rectangular groove 32 and the second rectangular groove 33 are symmetrical with respect to a short side center line of the dielectric substrate 4; the second inverted U-shaped patch 22 and the third inverted U-shaped patch 23 are symmetrical about the mid-perpendicular line of the short side of the dielectric substrate 4; the first microstrip feeder 11 is disposed on a mid-perpendicular line of a short side of the dielectric substrate 4, and the second microstrip feeder 12 and the third microstrip feeder 13 are symmetrical about the mid-perpendicular line of the short side of the dielectric substrate 4.
As an improvement, the ground plate 3 is further provided with a first vertical open slot 34 and a second vertical open slot 35, and the first vertical open slot 34 and the second vertical open slot 35 are symmetrical with respect to a short side mid-perpendicular of the dielectric substrate 4; wherein, the first vertical open slot 34 is arranged on the grounding plate 3 between the first rectangular slot 32 and the first microstrip feeder 11, and the second vertical open slot 35 is arranged on the grounding plate 3 between the second rectangular slot 33 and the first microstrip feeder 11; one ends of the first and second vertical open grooves 34 and 35 are respectively communicated with the inverted U-shaped groove 31, and the other ends of the first and second vertical open grooves 34 and 35 are respectively extended in the Y-axis negative direction. The first vertical open slot 34 and the second vertical open slot 35 are used for eliminating resonance of the first inverted U-shaped patch 21 and the inverted U-shaped slot 31 at high frequency, reducing interference to the high frequency antenna, and playing a decoupling effect.
In this embodiment, the first inverted U-shaped patch 21, the second inverted U-shaped patch 22 and the third inverted U-shaped patch 23 are respectively obtained by chamfering a rectangular patch; the rectangular patch is chamfered near two corners in the positive direction of the Y axis to form an inverted U-shaped overall outline to form a first inverted U-shaped patch 21, a second inverted U-shaped patch 22 and a third inverted U-shaped patch 23.
The inverted U-shaped groove 31 is obtained by chamfering a rectangular groove; chamfering is performed by making the rectangular groove close to both corners in the positive direction of the Y axis so that the overall outline thereof is inverted U-shaped to form an inverted U-shaped groove 31.
As shown in FIG. 4, the effective working frequency bands of the three-frequency band broadband slot antenna provided by the embodiment of the utility model are 0.698-0.960 GHz, 1.7 GHz-2.7 GHz and 3.3-6 GHz, the relative bandwidths on the three working frequency bands are 31.60%, 45.45% and 58.06% respectively, the bandwidths are generally superior to those of the multi-frequency band antenna in the prior art, and the three-frequency band broadband effect is realized.
As shown in FIG. 5, in the embodiment of the utility model, the isolation of each port of the antenna is better than 15dB, wherein S 14 Even reach the standard better than 30dB, realized the characteristic of high isolation.
The utility model provides a three-frequency-band broadband slot antenna, and provides an inverted U-shaped slot antenna structure of a coplanar waveguide, which is simple in structure and low in manufacturing cost, and the antenna can have a wider working frequency band by only printing a grounding plate and a metal patch on the top of a dielectric substrate and resonating with a slot through the metal patch. Further, two vertical open-circuit grooves symmetrically distributed on the grounding plate can effectively eliminate out-of-band resonance, reduce coupling phenomenon among antennas in different working frequency bands and effectively improve isolation of the antennas.
The three-frequency-band broadband slot antenna provided by the utility model has the effective working frequency bands of 0.698-0.960 GHz, 1.7 GHz-2.7 GHz and 3.3-6 GHz, the relative bandwidths on the three working frequency bands are 31.60%, 45.45% and 58.06%, and the isolation between ports is better than 15dB. The utility model integrates the antennas working in different frequency bands through a shared structure method, so that the antennas can work in three frequency bands. Compared with the prior art, the utility model has the advantages of compact structure, multiple working frequency bands, wide working frequency band and high isolation, and the working frequency band covers 2/3/4/5G, thus being widely applied to various wireless communication scenes.
The foregoing examples illustrate only a few embodiments of the utility model and are described in detail herein without thereby limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (8)
1. The three-frequency-band broadband slot antenna is characterized by comprising a dielectric substrate, a grounding plate, a first inverted U-shaped patch, a second inverted U-shaped patch, a third inverted U-shaped patch, a first microstrip feeder, a second microstrip feeder and a third microstrip feeder which are printed on the upper surface of the dielectric substrate, and a fourth microstrip feeder which is printed on the lower surface of the dielectric substrate;
the medium substrate is rectangular, the short side of the medium substrate is parallel to the X axis, and the long side of the medium substrate is parallel to the Y axis; the grounding plate is covered on the upper surface of the medium substrate, an inverted U-shaped groove, a first rectangular groove and a second rectangular groove are formed in the grounding plate, the inverted U-shaped groove is formed in the middle of the grounding plate, and the first rectangular groove and the second rectangular groove are arranged in the negative direction of the Y axis of the inverted U-shaped groove and are arranged side by side along the X axis direction;
the first inverted U-shaped patch is arranged in the middle of the inverted U-shaped groove, the second inverted U-shaped patch is arranged in the middle of the first rectangular groove, and the third inverted U-shaped patch is arranged in the middle of the second rectangular groove; the first microstrip feeder, the second microstrip feeder and the third microstrip feeder extend along the Y-axis direction, one ends of the first microstrip feeder, the second microstrip feeder and the third microstrip feeder are respectively connected to the middle parts of the side edges of the first inverted U-shaped patch, the second inverted U-shaped patch and the third inverted U-shaped patch, which are close to the Y-axis negative direction, and the other ends of the first microstrip feeder, the second microstrip feeder and the third microstrip feeder extend to the edges of the short edges of the medium substrate, which are close to the Y-axis negative direction;
the grounding plate is provided with a channel groove for the first microstrip feeder, the second microstrip feeder and the third microstrip feeder to pass through, so that the first microstrip feeder, the second microstrip feeder and the third microstrip feeder are not contacted with the grounding plate;
a rectangular open slot extending along the Y-axis direction is formed in the middle of the side edge of the first inverted U-shaped patch, which is close to the Y-axis positive direction, and a feed through hole is formed in one side of the rectangular open slot, and the feed through hole is arranged on the first inverted U-shaped patch and penetrates through the dielectric substrate;
the fourth microstrip feeder printed on the lower surface of the medium substrate extends along the X-axis direction, one end of the fourth microstrip feeder is arranged at the feed through hole, the other end of the fourth microstrip feeder extends to the other end of the rectangular open slot, and the middle of the fourth microstrip feeder is in cross coupling with the rectangular open slot.
2. The tri-band wideband slot antenna of claim 1, wherein the ground plate is further provided with a first vertical open slot and a second vertical open slot, the first vertical open slot and the second vertical open slot being symmetrical about a mid-perpendicular of a short side of the dielectric substrate; the first vertical open slot is arranged on the grounding plate between the first rectangular slot and the first microstrip feeder, and the second vertical open slot is arranged on the grounding plate between the second rectangular slot and the first microstrip feeder; one ends of the first vertical open-circuit groove and the second vertical open-circuit groove are respectively communicated with the inverted U-shaped groove, and the other ends of the first vertical open-circuit groove and the second vertical open-circuit groove respectively extend along the Y-axis negative direction.
3. The tri-band wideband slot antenna of claim 1, wherein a first SMA interface, a second SMA interface, and a third SMA interface are disposed on an outer side of the dielectric substrate, and are configured to feed the first microstrip feed line, the second microstrip feed line, and the third microstrip feed line, respectively; the inner conductors of the first SMA interface, the second SMA interface and the third SMA interface are respectively connected with the first microstrip feeder, the second microstrip feeder and the third microstrip feeder, and the outer conductors of the first SMA interface, the second SMA interface and the third SMA interface are respectively connected with the grounding plate;
a fourth SMA interface is arranged at the feed through hole and used for feeding power to a fourth microstrip feeder line; and an inner conductor of the fourth SMA interface passes through the feed through hole to be connected with a fourth microstrip feeder line, and an outer conductor of the fourth SMA interface is connected with the grounding plate.
4. The tri-band wideband slot antenna of claim 1, wherein the first rectangular slot and the second rectangular slot are symmetrical about a short side mid-perpendicular of the dielectric substrate; the second inverted U-shaped patch and the third inverted U-shaped patch are symmetrical with respect to the mid-perpendicular line of the short side of the dielectric substrate; the first microstrip feeder is arranged on the middle perpendicular line of the short side of the medium substrate, and the second microstrip feeder and the third microstrip feeder are symmetrical with respect to the middle perpendicular line of the short side of the medium substrate.
5. The tri-band wideband slot antenna of claim 1, wherein the first inverted-U patch, the second inverted-U patch, and the third inverted-U patch are each formed by chamfering a rectangular patch; chamfering is carried out on two corners of the rectangular patch, which are close to the positive direction of the Y axis, so that the overall outline of the rectangular patch is inverted U-shaped, and a first inverted U-shaped patch, a second inverted U-shaped patch and a third inverted U-shaped patch are formed.
6. The tri-band wideband slot antenna of claim 5, wherein the inverted U-shaped slot is formed by chamfering a rectangular slot; chamfering is carried out on two corners of the rectangular groove close to the positive direction of the Y axis, so that the overall outline of the rectangular groove is inverted U-shaped, and an inverted U-shaped groove is formed.
7. The tri-band wideband slot antenna of claim 1, wherein the dielectric substrate has a dielectric constant of 4.6.
8. The tri-band wideband slot antenna of claim 1, wherein the dielectric substrate has a thickness of 1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311337303.8A CN117080747B (en) | 2023-10-17 | 2023-10-17 | Three-frequency-band broadband slot antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311337303.8A CN117080747B (en) | 2023-10-17 | 2023-10-17 | Three-frequency-band broadband slot antenna |
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| CN117080747A CN117080747A (en) | 2023-11-17 |
| CN117080747B true CN117080747B (en) | 2023-12-12 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006287472A (en) * | 2005-03-31 | 2006-10-19 | Furukawa Electric Co Ltd:The | Multifrequency shared antenna |
| CN111725615A (en) * | 2019-03-20 | 2020-09-29 | 三星电机株式会社 | Antenna device |
| CN114665278A (en) * | 2022-04-22 | 2022-06-24 | 西安电子科技大学 | Graphene circularly polarized wearable antenna based on artificial magnetic conductor array |
| CN115621723A (en) * | 2022-12-14 | 2023-01-17 | 长沙驰芯半导体科技有限公司 | Compact ceramic chip antenna array based on ultra wide band three-dimensional direction finding |
-
2023
- 2023-10-17 CN CN202311337303.8A patent/CN117080747B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006287472A (en) * | 2005-03-31 | 2006-10-19 | Furukawa Electric Co Ltd:The | Multifrequency shared antenna |
| CN111725615A (en) * | 2019-03-20 | 2020-09-29 | 三星电机株式会社 | Antenna device |
| CN114665278A (en) * | 2022-04-22 | 2022-06-24 | 西安电子科技大学 | Graphene circularly polarized wearable antenna based on artificial magnetic conductor array |
| CN115621723A (en) * | 2022-12-14 | 2023-01-17 | 长沙驰芯半导体科技有限公司 | Compact ceramic chip antenna array based on ultra wide band three-dimensional direction finding |
Non-Patent Citations (1)
| Title |
|---|
| 小型渐变微波带线馈电平面超宽带天线;刘文坚;叶亮华;;科学技术与工程(19);全文 * |
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