CN211017399U - Three-frequency antenna with Y-shaped structure loaded with L-shaped slot - Google Patents
Three-frequency antenna with Y-shaped structure loaded with L-shaped slot Download PDFInfo
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- CN211017399U CN211017399U CN202020122149.8U CN202020122149U CN211017399U CN 211017399 U CN211017399 U CN 211017399U CN 202020122149 U CN202020122149 U CN 202020122149U CN 211017399 U CN211017399 U CN 211017399U
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Abstract
The utility model discloses a three frequency antenna of L shape gap of Y shape structure loading, including dielectric substrate, radiating element, microstrip feeder, left ground plane and right ground plane, radiating element is by rectangle paster along the upper edge of radiating element cut off a rectangle, the lower left corner cuts off a right trapezoid one, the lower right corner cuts off a right trapezoid two and obtains, left ground plane is by rectangle paster along the upper edge open a L shape gap one, the upper left corner cuts off a right triangle one, the upper right corner cuts off a square one and obtains, right ground plane is by rectangle paster along the upper edge open a L shape gap two, the upper right corner cuts off a right triangle two, the upper left corner cuts off a square two and obtains.
Description
Technical Field
The utility model belongs to the technical field of wireless communication, specifically a three frequency antennas in Y shape structure loading L shape gap.
Background
With the rapid development of wireless communication systems, people have higher and higher performance requirements on wireless communication systems, and AN antenna, which is one of the main elements of a communication system, also has higher performance requirements, one of which is to require that the antenna can adapt to bandwidths of various different communication protocols, such as a Personal Communication System (PCS), a wireless local area network (W L AN), a Worldwide Interoperability for Microwave Access (WiMAX), and the like.
The prior document with the application number of 201610065150.X discloses a coplanar waveguide feed tri-band antenna applied to W L AN/WiMAX, and the small rectangular slots which are symmetrical left and right are loaded inside a rectangular radiation patch, although the characteristic of tri-band is realized, the size is large, the integration is difficult, the frequency band is narrow, errors are easily generated in the processing process, the working frequency band of the antenna is easily deviated, the antenna cannot cover the required frequency band, and the antenna is only modified aiming at the radiation patch.
SUMMERY OF THE UTILITY MODEL
To the not enough of prior art, the utility model discloses the technical problem that aims to solve provides a three frequency antennas in Y shape structure loading L shape gap.
The utility model provides a technical scheme who solves technical problem provides a three frequency antenna of Y shape structure loading L shape gap, including medium base plate, radiating element, microstrip feeder, left ground plane and right ground plane, printed radiating element, microstrip feeder, left ground plane and right ground plane on medium base plate one side, radiating element and microstrip feeder connection, microstrip feeder is connected with the base of medium base plate, left ground plane and radiating element and microstrip feeder do not connect, right ground plane and radiating element and microstrip feeder do not connect, microstrip feeder, left ground plane and right ground plane all are located the radiating element below, left ground plane and right ground plane are located the microstrip feeder left and right sides respectively, and left ground plane and right ground plane are the same with the distance of microstrip feeder;
the radiating unit is obtained by cutting a rectangle from a rectangular patch along the upper edge of the radiating unit, cutting a right trapezoid I from the lower left corner, and cutting a right trapezoid II from the lower right corner; the lengths of the upper bottoms of the right trapezoid I and the right trapezoid II are smaller than the lower bottoms;
the left ground plane is obtained by cutting a L-shaped gap I along the upper edge of the rectangular patch, cutting a right-angled triangle I at the upper left corner and cutting a square I at the upper right corner;
the right ground plane is obtained by cutting a L-shaped gap II along the upper edge of the rectangular patch, cutting a right-angled triangle II at the upper right corner and cutting a square II at the upper left corner;
the L-shaped slot I and the L-shaped slot II are both formed by vertical rectangles and horizontal rectangles, the upper edges of the vertical rectangles are connected with the upper edges of the ground planes, the lower edges of the vertical rectangles are connected with the horizontal rectangles, and the horizontal rectangles are located on the sides, close to the microstrip feed line, of the vertical rectangles connected with the horizontal rectangles.
Compared with the prior art, the utility model discloses beneficial effect lies in:
1. the antenna adopts a coplanar waveguide feed mode, the coplanar waveguide ground plane and the microstrip feed line are positioned on the same layer, and the serial connection or the parallel connection with other devices is easy to realize, so that the thickness of the antenna is effectively reduced, the volume of the antenna is further reduced, and the miniaturization is realized.
2. The radiation unit generates two working frequency bands, wherein the length of the upper bottom of an isosceles trapezoid obtained in the radiation unit is larger than that of the lower bottom, so that the reflection coefficient of a high frequency band can be reduced, and the high frequency bandwidth is expanded.
3. The two triangular corner cutting structures and the two square corner cutting structures are loaded on the left ground plane and the right ground plane, so that the center frequency of the antenna is tuned, the reflection coefficient of the antenna is reduced, the working bandwidth of the antenna is increased, L-shaped gaps are loaded on the left ground plane and the right ground plane, the working frequency band of the antenna is increased, the multiband characteristics of 1.70-2.7 GHz, 3.36-3.76 GHz and 4.42-5.92 GHz are realized, and all frequency bands of W L AN/WiMAX are covered.
4. The lengths and the distances of the two rectangles are obtained by changing the radiation units, so that the current flow direction is changed, the bandwidth of the middle frequency band can be expanded, and the antenna can effectively cover all frequency bands of W L AN/WiMAX.
5. By adjusting the length of the lower bottom of the isosceles trapezoid in the radiation unit, the bandwidth of the middle frequency band can be properly expanded, and the reflection coefficient of the middle frequency band is reduced, so that the antenna effectively covers all frequency bands of W L AN/WiMAX.
6. The antenna has the advantages of small volume, simple structure, low manufacturing cost, wide working frequency band, omnidirectional radiation characteristic in the working frequency band, good directivity and the like.
Drawings
Fig. 1 is a schematic front view of an embodiment of the present invention.
In the figure, the antenna comprises a dielectric substrate 1, a radiating element 2, a microstrip feeder line 3, a left ground plane 4, a right ground plane 5, a rectangle 21, a right trapezoid I22, a right trapezoid II 23, a right trapezoid I41, a right triangle I42, a square I43 and L-shaped slot I51, a right triangle II 52 and a square II 53 and a L-shaped slot II.
Fig. 2 is a reflection coefficient graph of the antenna according to embodiment 1 of the present invention.
Fig. 3 is a radiation pattern of the antenna of embodiment 1 of the present invention at 2.4 GHz.
Fig. 4 is a radiation pattern of the antenna of embodiment 1 of the present invention at 3.4 GHz.
Fig. 5 is a radiation pattern of the antenna of embodiment 1 of the present invention at 5.2 GHz.
Detailed Description
The present invention will be further explained with reference to the following embodiments and accompanying drawings. The specific embodiments are only used for further elaboration of the invention, and do not limit the scope of protection of the claims of the present application.
The utility model provides a three frequency antenna (refer to antenna for short) of L shape gaps of Y-shaped structure loading, this antenna includes medium base plate 1, radiating element 2, microstrip feeder 3, left ground plane 4 and right ground plane 5 are printed on one side of medium base plate 1, radiating element 2 and microstrip feeder 3 are connected, microstrip feeder 3 is connected with the base of medium base plate 1, left ground plane 4 is not connected with radiating element 2 and microstrip feeder 3, right ground plane 5 is not connected with radiating element 2 and microstrip feeder 3, left ground plane 4 and right ground plane 5 are all located radiating element 2 below, left ground plane 4 and right ground plane 5 are located microstrip feeder 3 left and right sides respectively, left ground plane 4 and right ground plane 5 are the same with microstrip feeder 3's distance;
the radiating unit 2 is characterized in that a rectangle 21 is cut from a rectangular patch along the upper edge of the radiating unit 2, a right trapezoid I22 is cut from the lower left corner, and a right trapezoid II 23 is cut from the lower right corner, so that an isosceles trapezoid structure is formed below the two rectangles above, and the length of the upper bottom of the isosceles trapezoid is greater than that of the lower bottom; the lengths of the upper bottoms of the first right-angle trapezoid 22 and the second right-angle trapezoid 23 are smaller than the lower bottoms;
the left ground plane 4 is formed by cutting a L-shaped gap I43 on the upper edge of a rectangular patch, cutting a right-angled triangle I41 on the upper left corner and cutting a square I42 on the upper right corner;
the right ground plane 5 is obtained by cutting an L-shaped gap II 53 along the upper edge of the rectangular patch, cutting a right-angled triangle II 51 at the upper right corner and cutting a square II 52 at the upper left corner, and the lower edge of the L-shaped gap II 53 is positioned inside the right ground plane 5;
the first L-shaped slot 43 and the second L-shaped slot 53 are both formed by vertical rectangles and horizontal rectangles, the vertical rectangles are vertically placed, the upper edges of the vertical rectangles are connected with the upper edges of the respective ground planes, the lower edges of the vertical rectangles are connected with the respective horizontal rectangles, and the horizontal rectangles are horizontally placed and are positioned on the side, close to the microstrip feed line 3, of the respective vertical rectangles connected with the horizontal rectangles.
Preferably, the central axis of the rectangle 21 is collinear with the central axis of the radiating element 2; the size and the shape of the right trapezoid I22 and the right trapezoid II 23 are the same and are symmetrical about the central axis of the radiation unit 2;
preferably, the central axis of the radiating element 2 and the central axis of the microstrip feed line 3 are collinear with the central axis of the dielectric substrate 1.
Preferably, the left ground plane 4 and the right ground plane 5 are symmetrical with respect to a central axis of the microstrip feed line 3.
Preferably, the first right triangle 41 and the second right triangle 51 have the same size and shape and are symmetrical about the central axis of the microstrip feed line 3, the first square 42 and the second square 52 have the same size and shape and are symmetrical about the central axis of the microstrip feed line 3, and the first L-shaped slot 43 and the second L-shaped slot 53 have the same size and shape and are symmetrical about the central axis of the microstrip feed line 3.
Preferably, the dielectric substrate 1 is a glass fiber epoxy resin copper clad laminate (FR-4) with a relative dielectric constant of 4.4.
Preferably, the radiating element 2, the left ground plane 4 and the right ground plane 5 are all metal patches; the microstrip feeder 3 is a rectangular metal patch.
Example 1
In the embodiment, the dielectric substrate 1 is square, FR-4 with a relative dielectric constant of 4.4 is adopted, the size of the dielectric substrate 1 is 30mm × 30mm × 1.6mm, the left ground plane 4 and the right ground plane 5 are symmetrical about the central axis of the microstrip feed line 3, and the central axes of the radiation unit 2 and the microstrip feed line 3 are collinear with the central axis of the dielectric substrate 1.
The radiation unit 2 is 3mm away from the top edge of the medium substrate 1 and 4mm away from the left edge of the medium substrate 1.
The radiating unit 2 is obtained by cutting a rectangle 21 from a rectangular metal patch of 22mm × 11mm along the upper edge of the radiating unit 2, cutting a right-angled trapezoid I22 from the lower left corner and a right-angled trapezoid II 23 from the lower right corner, wherein the central axis of the rectangle 21 is collinear with the central axis of the radiating unit 2 and has the size of 6mm × 4mm, the right-angled trapezoid I22 and the right-angled trapezoid II 23 are symmetrical about the central axis of the radiating unit 2, and the upper bottom, the lower bottom and the height of the right-angled trapezoid I22 and the right-angled trapezoid II 23 are 4mm, 5mm and 7mm respectively.
The microstrip feed line 3 is a rectangular metal patch with the length and width of 2mm × 16mm, and the left ground plane 4 and the right ground plane 5 are symmetrical about the central axis of the microstrip feed line 3.
The left ground plane 4 is obtained by cutting a L-shaped gap I43 along the upper edge of a rectangular metal patch of 13.1mm × 11mm, cutting a right-angled triangle I41 at the upper left corner and cutting a square I42 at the upper right corner, the lower edge of the L-shaped gap I43 is positioned inside the left ground plane 4, the right ground plane 5 is obtained by cutting a L-shaped gap II 53 along the upper edge of a rectangular metal patch of 13.1mm × 11mm, cutting a right-angled triangle II 51 at the upper right corner and cutting a square II 52 at the upper left corner, and the lower edge of the L-shaped gap II 53 is positioned inside the right ground plane 5;
the first right-angle triangle 41 and the second right-angle triangle 51 are symmetrical about the central axis of the microstrip feeder line 3, and the sizes of the first right-angle triangle and the second right-angle triangle are both 5mm horizontally and 11mm vertically; the first square 42 and the second square 52 are symmetrical about the central axis of the microstrip feeder line 3, and the side lengths are both 2.5 mm;
the L-shaped slot I43 is 6mm away from the left edge of the dielectric substrate 1, 2.7mm away from the bottom edge of the dielectric substrate 1, and the L-shaped slot I43 and the L-shaped slot II 53 are symmetrical about the central axis of the microstrip feed line 3.
The L-shaped first slots 43 and the L-shaped second slots 53 are both formed by vertical rectangles and horizontal rectangles, the upper edges of the vertical rectangles are connected with the upper edges of the respective ground planes, the lower edges of the vertical rectangles are connected with the respective horizontal rectangles, the horizontal rectangles are both located on the sides, close to the microstrip feed lines 3, of the respective vertical rectangles connected with the horizontal rectangles, the vertical rectangles are 0.5mm × 7.8.8 mm in size, and the horizontal rectangles are 5.2mm × 0.5.5 mm in size.
Fig. 2 is a reflection coefficient curve of the antenna of this embodiment, and it can be seen from fig. 2 that the reflection coefficient of the antenna in the frequency bands of 1.70 to 2.7GHz, 3.36 to 3.76GHz, and 4.42 to 5.92GHz is less than-10 dB, so that the antenna can work in the frequency bands of 1.70 to 2.7GHz, 3.36 to 3.76GHz, and 4.42 to 5.92GHz, and can cover three frequency bands of 2.4 to 2.484GHz, 5.15 to 5.25GHz, and 5.725 to 5.825GHz of a wireless local area network (W L AN) and three frequency bands of 2.5 to 2.69GHz, 3.4 to 3.69GHz, and 5.25 to 5.85GHz of a Worldwide Interoperability for Microwave Access (WiMAX).
Fig. 3, 4 and 5 are radiation patterns of the antenna corresponding to the antenna of this embodiment at 2.4GHz, 3.4GHz and 5.2GHz, respectively, where E is an electric field and H is a magnetic field, and it can be seen from the figures that the radiation pattern of the antenna of this embodiment is approximately a dipole radiation pattern, which indicates that the antenna has good radiation characteristics. Under the three frequencies, the antenna shows better directivity and meets the engineering requirements.
The utility model discloses the nothing is mentioned the part and is applicable to prior art.
Claims (7)
1. A three-frequency antenna with a Y-shaped structure and loaded with L-shaped slots comprises a dielectric substrate, a radiation unit, a microstrip feeder line, a left ground plane and a right ground plane, wherein the radiation unit, the microstrip feeder line, the left ground plane and the right ground plane are printed on one surface of the dielectric substrate;
the radiating unit is obtained by cutting a rectangle from a rectangular patch along the upper edge of the radiating unit, cutting a right trapezoid I from the lower left corner, and cutting a right trapezoid II from the lower right corner; the lengths of the upper bottoms of the right trapezoid I and the right trapezoid II are smaller than the lower bottoms;
the left ground plane is obtained by cutting a L-shaped gap I along the upper edge of the rectangular patch, cutting a right-angled triangle I at the upper left corner and cutting a square I at the upper right corner;
the right ground plane is obtained by cutting a L-shaped gap II along the upper edge of the rectangular patch, cutting a right-angled triangle II at the upper right corner and cutting a square II at the upper left corner;
the L-shaped slot I and the L-shaped slot II are both formed by vertical rectangles and horizontal rectangles, the upper edges of the vertical rectangles are connected with the upper edges of the ground planes, the lower edges of the vertical rectangles are connected with the horizontal rectangles, and the horizontal rectangles are located on the sides, close to the microstrip feed line, of the vertical rectangles connected with the horizontal rectangles.
2. The tri-band antenna with the Y-shaped structure loaded with the L-shaped slot of claim 1, wherein a central axis of the rectangle is collinear with a central axis of the radiating element, and the first right-angle trapezoid and the second right-angle trapezoid are symmetrical with respect to the central axis of the radiating element.
3. The tri-band antenna with the Y-shaped structure loaded with L-shaped slots as claimed in claim 1, wherein the left ground plane and the right ground plane are symmetrical with respect to the central axis of the microstrip feed line.
4. The tri-band antenna with a Y-shaped structure loaded with L-shaped slots as claimed in claim 3, wherein the first right triangle and the second right triangle are symmetric with respect to the central axis of the microstrip feed line, the first square and the second square are symmetric with respect to the central axis of the microstrip feed line, and the first L-shaped slot and the second L-shaped slot are symmetric with respect to the central axis of the microstrip feed line.
5. The tri-band antenna with a Y-shaped structure loaded with L-shaped slots as claimed in any one of claims 1-4, wherein the central axes of the radiating elements and the microstrip feed lines are collinear with the central axis of the dielectric substrate.
6. The tri-band antenna with the Y-shaped structure loaded with the L-shaped slot of claim 1, wherein the dielectric substrate is a glass fiber epoxy resin copper-clad plate with a relative dielectric constant of 4.4.
7. The tri-band antenna with the Y-shaped structure and the loaded L-shaped slot of claim 1, wherein the radiating element, the left ground plane and the right ground plane are all metal patches, and the microstrip feed line is a rectangular metal patch.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020122149.8U CN211017399U (en) | 2020-01-19 | 2020-01-19 | Three-frequency antenna with Y-shaped structure loaded with L-shaped slot |
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| CN202020122149.8U CN211017399U (en) | 2020-01-19 | 2020-01-19 | Three-frequency antenna with Y-shaped structure loaded with L-shaped slot |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113675600A (en) * | 2021-08-26 | 2021-11-19 | 安徽师范大学 | Circularly polarized antenna working in Beidou, GPS and 5G frequency bands |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113675600A (en) * | 2021-08-26 | 2021-11-19 | 安徽师范大学 | Circularly polarized antenna working in Beidou, GPS and 5G frequency bands |
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