CN215418583U - Microstrip antenna - Google Patents
Microstrip antenna Download PDFInfo
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- CN215418583U CN215418583U CN202121170158.5U CN202121170158U CN215418583U CN 215418583 U CN215418583 U CN 215418583U CN 202121170158 U CN202121170158 U CN 202121170158U CN 215418583 U CN215418583 U CN 215418583U
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Abstract
The utility model discloses a microstrip antenna, which comprises a ground plate, a substrate and a radiation unit which are sequentially stacked, wherein the radiation unit comprises a first gap and a second gap which are parallel to each other and arranged at intervals, and at least one third gap which is connected with the first gap and the second gap, tuning branches are also arranged on an extending path of at least one of the at least one third gap, the tuning branches are arranged in pairs, and a pair of tuning branches are spaced from each other and are respectively connected to the outer sides of the corresponding first gap and the corresponding second gap. According to the microstrip antenna, the first gap, the second gap and the third gap are loaded on the radiation unit, and the proper tuning branches are loaded in the gap structure, so that the frequency tuning of the microstrip antenna can be simply and effectively realized, electronic components are not needed, the service life of the overall structure of the microstrip antenna is guaranteed, and the practicability of the microstrip antenna is improved.
Description
Technical Field
The utility model relates to the technical field of communication, in particular to a microstrip antenna.
Background
The microstrip antenna has the advantages of small volume, light weight, low profile, easy conformality, easy integration, low cost, suitability for batch production, and diversified electrical properties.
The resonant frequency of a microstrip antenna in a certain operation mode depends on the size of the antenna, the dielectric constant and the thickness of the substrate, and a new antenna is usually required if the resonant frequency of the antenna is to be changed.
In the prior art, a method for tuning a frequency of a microstrip antenna includes: and loading the centralized electronic component. However, the service life and reliability of the electronic components are shorter than those of the general structure of the microstrip antenna, so that the service life of the microstrip antenna is shortened, and the realization of frequency tuning of the microstrip antenna is not facilitated.
SUMMERY OF THE UTILITY MODEL
In view of the above problems, an object of the present invention is to provide a microstrip antenna, which facilitates frequency tuning of the microstrip antenna and improves the practicability of the microstrip antenna.
A microstrip antenna comprising:
the radiation unit is provided with a first gap, a second gap and at least one third gap, wherein the first gap and the second gap are parallel to each other and are arranged at intervals, and the third gap is communicated with the first gap and the second gap;
the radiating unit comprises tuning branches, the tuning branches are arranged on the extending path of at least one of the at least one third gap and are arranged in pairs, and a pair of the tuning branches are spaced from each other and are respectively connected to the outer sides of the corresponding first gap and the second gap.
Optionally, the radiation unit further comprises:
and the parasitic units are arranged in the first gap and the second gap and positioned at two sides of the tuning branches.
Optionally, the tuning stub has an extension length greater than a width of the first slot or a width of the second slot.
Optionally, a first circular gap is disposed on the ground plate, and the first circular gap is correspondingly disposed below the parasitic element of the radiating element.
Optionally, the number of the first circular ring-shaped slots disposed on the ground plate is equal to the number of the parasitic elements disposed on the radiating element, and the radiating element is square.
Optionally, the radiation unit has an axisymmetric structure, and a symmetry axis is parallel to an extending direction of the first slit or an extending direction of the second slit.
Optionally, the feeding portion of the radiating element has a square structure and extends outward from one side of the radiating element, and the extending direction of the feeding portion is parallel to the symmetry axis of the radiating element.
Optionally, the third slit is disposed at an equally divided position along the extending direction of the first slit.
Optionally, the first gap and the second gap are both rectangular, the number of the parasitic units in the first gap is two, the two parasitic units are located inside the first gap and separate the first gap into two first square annular gaps, the number of the parasitic units in the second gap is two, and the two parasitic units are located inside the second gap and separate the second gap into two second square annular gaps.
Optionally, the end of the tuning stub of the radiating element is round or square.
The utility model provides a microstrip antenna which comprises a grounding plate, a substrate and a radiation unit, wherein the grounding plate, the substrate and the radiation unit are sequentially stacked, the radiation unit comprises a first gap and a second gap which are parallel to each other and are arranged at intervals, and at least one third gap which is connected with the first gap and the second gap, tuning branches are further arranged on an extending path of at least one of the at least one third gap, the tuning branches are arranged in pairs, and a pair of tuning branches are spaced from each other and are respectively connected to the outer sides of the corresponding first gap and the corresponding second gap. According to the microstrip antenna, the first gap, the second gap and the third gap are loaded on the radiation unit, and the proper tuning branches are loaded in the gap structure, so that the frequency tuning of the microstrip antenna can be simply and effectively realized, electronic components are not needed, the service life of the overall structure of the microstrip antenna is guaranteed, and the practicability of the microstrip antenna is improved.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:
fig. 1A and 1B are schematic diagrams illustrating an overall structure of a microstrip antenna according to an embodiment of the present invention;
FIG. 2 illustrates a reflection coefficient curve for a microstrip antenna according to an embodiment of the present invention;
figures 3A and 3B illustrate radiation patterns of microstrip antennas according to embodiments of the present invention.
Detailed Description
Various embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Like elements in the various figures are denoted by the same or similar reference numerals. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale.
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples.
Fig. 1A and 1B are schematic diagrams illustrating an overall structure of a microstrip antenna according to an embodiment of the present invention.
Referring to fig. 1A and 1B, the microstrip antenna according to the embodiment of the present invention includes a ground plate 100, a substrate 200, and a radiation unit 300, which are sequentially stacked, where the ground plate 100 and the radiation unit 300 are plates of conductive material, such as an aluminum plate, a copper plate, and the like. In the present embodiment, the ground plate 100 and the radiation unit 300 are respectively disposed on two opposite surfaces, e.g., a front surface and a back surface, of the substrate 200. In an alternative embodiment, the substrate 200 is a Rogers board with a corresponding dielectric constant of 2.2.
In this embodiment, the radiation unit 300 has an axisymmetric structure, which is symmetric in the left-right direction with reference to fig. 1B, the symmetry axis is parallel to the x direction, the radiation unit 300 includes a feeding portion 301, the feeding portion 301 has a rectangular structure and extends along the x direction, the symmetry axis of the feeding portion 301 is the same as the symmetry axis of the radiation unit 300, the radiation unit 300 is in a shape of a "convex" as a whole, and the feeding portion 301 is a protruding portion in a shape of a "convex" as a whole.
The radiation unit 300 is provided with a first gap 310 and a second gap 320 which are parallel and spaced with each other, and a third gap 330 which is communicated with the first gap 310 and the second gap 320, wherein an elongated tuning branch 340 is provided on an extension path of the third gap 330, the tuning branches 340 are arranged in pairs, two branches of the pair of tuning branches 340 are spaced with each other and have respective axes coincident, one end of each of the two tuning branches 340 is connected to an outer side of the first gap 310 and an outer side of the second gap 320, and the other end of each of the two tuning branches 340 extends to an inner space of the third gap 330 but is not connected with each other and is opposite to each other. Wherein the ends of tuning branches 340 facing each other are rounded or squared ends.
In this embodiment, the first slot 310 and the second slot 320 are symmetrical to each other about the axis of symmetry of the radiation unit 300, the first slot 310 and the second slot 320 are both rectangular, the third slot 330 is one, the setting position corresponds to the halving position of the extending direction (x direction) of the first slot 310 and the second slot 320, the third slot 330 is rectangular and communicates the middle part of the first slot 310 and the middle part of the second slot 320, the length of the tuning branch 340 is larger than the width of the first slot 310 (i.e. the size of the y direction) and smaller than the sum of the width of the first slot 310 and the length of the third slot 330, the tuning branch 340 corresponds to halving the first slot 310 and the second slot 320, the tuning branch 340 divides the rectangular first slot 310 into an upper part and a lower part, the tuning branch 340 divides the rectangular second slot 320 into an upper part and a lower part, parasitic elements 302 are arranged in spaces on both sides of each of the tuning branches 340 (i.e., upper and lower portions of the rectangular first slit 310 or the rectangular second slit 320), two first square annular slits 311 are formed in the first slit 310, two second square annular slits 321 are formed in the second slit 320, and the two first square annular slits 311 and the two second square annular slits 321 correspond to each other.
The ground plate 100 is provided with four first circular ring-shaped slits 110, in this embodiment, the parasitic unit 302 is square, the first circular ring-shaped slits 110 are circular, specifically, the parasitic unit 302 is square, the geometric center of the corresponding square ring-shaped slit coincides with the z direction, and the four first circular ring-shaped slits 110 provided on the ground plate 100 and the four square ring-shaped slits provided on the radiation unit 300 are in one-to-one correspondence in the z direction.
The first circular slot 110 matched with the square circular slot on the radiation unit 300 is arranged on the ground plate 100, so that the matching performance of the microstrip antenna of the embodiment of the utility model can be further improved, and the radiation effect of the microstrip antenna can be improved.
In an alternative embodiment, the third slot 330 is at least one, the setting position is an equal division position of the extension direction (x direction) of the first slot 310 and the second slot 320, such as a halving position, a trisection position, and so on, correspondingly, the tuning branches 330 arranged in pairs are arranged on the extension path of at least one of the at least one third slot 330, a corresponding number of parasitic units 302 are arranged on both sides of each branch of the tuning branches 340 according to the number of the tuning branches 340, and the number of the first circular slots 110 in the corresponding ground plate 100 is equal to the number of the parasitic units 302.
In an alternative embodiment, the number of the third slits 330 is at least one, the arrangement position is located between the two ends of the extension direction of the first slit 310 and the second slit 320, the at least one third slits 330 are arranged at intervals from each other and are not limited to being arranged at equal intervals, and the tuning branches 330 arranged in pairs are arranged on the extension path of at least one of the at least one third slits 330.
Fig. 2 shows a reflection coefficient curve of a microstrip antenna according to an embodiment of the present invention.
As shown in fig. 2, different feeding currents are provided to the microstrip antenna according to the embodiment of the present invention, and the reflection coefficient is adjustable at least in the range of 3.2GHz to 3.45GHz in the low frequency band and in the range of 3.9GHz to 4.1GHz in the high frequency band.
Figures 3A and 3B illustrate radiation patterns of microstrip antennas according to embodiments of the present invention. Fig. 3A is a horizontal directional diagram, and fig. 3B is a vertical directional diagram.
As shown in fig. 3A and 3B, the microstrip antenna according to the embodiment of the present invention has a main lobe gain of 7.81dB in the horizontal direction at a frequency of 2.6Ghz and a main lobe gain of 7.76dB in the vertical direction at a frequency of 90 Phi, and has good directivity.
The utility model provides a microstrip antenna which comprises a grounding plate, a substrate and a radiation unit, wherein the grounding plate, the substrate and the radiation unit are sequentially stacked, the radiation unit comprises a first gap and a second gap which are parallel to each other and are arranged at intervals, and at least one third gap which is connected with the first gap and the second gap, tuning branches are further arranged on an extending path of at least one of the at least one third gap, the tuning branches are arranged in pairs, and a pair of tuning branches are spaced from each other and are respectively connected to the outer sides of the corresponding first gap and the corresponding second gap. According to the microstrip antenna, the first gap, the second gap and the third gap are loaded on the radiation unit, and the proper tuning branches are loaded in the gap structure, so that the frequency tuning of the microstrip antenna can be simply and effectively realized, electronic components are not needed, the service life of the overall structure of the microstrip antenna is guaranteed, and the practicability of the microstrip antenna is improved.
In accordance with the embodiments of the present invention as set forth above, these embodiments are not exhaustive and do not limit the utility model to the precise embodiments described. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best utilize the utility model and various embodiments with various modifications as are suited to the particular use contemplated. The utility model is limited only by the claims and their full scope and equivalents.
Claims (10)
1. A microstrip antenna, comprising:
the radiation unit is provided with a first gap, a second gap and at least one third gap, wherein the first gap and the second gap are parallel to each other and are arranged at intervals, and the third gap is communicated with the first gap and the second gap;
the radiating unit comprises tuning branches, the tuning branches are arranged on the extending path of at least one of the at least one third gap and are arranged in pairs, and a pair of the tuning branches are spaced from each other and are respectively connected to the outer sides of the corresponding first gap and the second gap.
2. The microstrip antenna of claim 1, wherein the radiating element further comprises:
and the parasitic units are arranged in the first gap and the second gap and positioned at two sides of the tuning branches.
3. The microstrip antenna of claim 1,
the extension length of the tuning branch is larger than the width of the first gap or the width of the second gap.
4. The microstrip antenna of claim 2,
and a first annular gap is arranged on the grounding plate and correspondingly arranged below the parasitic unit of the radiation unit.
5. The microstrip antenna of claim 4,
the number of the first annular gaps arranged on the grounding plate is equal to that of the parasitic units arranged on the radiation units, and the radiation units are square.
6. The microstrip antenna of any one of claims 1 to 5,
the radiating unit is of an axisymmetric structure, and the symmetry axis is parallel to the extending direction of the first gap or the extending direction of the second gap.
7. The microstrip antenna of claim 6,
the feed portion of the radiation unit is of a square structure and extends outwards from one side of the radiation unit, and the extending direction of the feed portion is parallel to the symmetry axis of the radiation unit.
8. The microstrip antenna of claim 6,
the third slit is provided at a position equally divided along the extending direction of the first slit.
9. The microstrip antenna of claim 2,
the first gap with the second gap all is rectangle in the first gap the quantity of parasitic element is two, and two parasitic elements are in the inside of first gap and will first gap is separated and is formed two first square annular gaps in the second gap the quantity of parasitic element is two, and two parasitic elements are in the inside of second gap and will the second gap is separated and is formed two second square annular gaps.
10. The microstrip antenna of claim 7,
the end of the tuning branch of the radiation unit is round or square.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121170158.5U CN215418583U (en) | 2021-05-27 | 2021-05-27 | Microstrip antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121170158.5U CN215418583U (en) | 2021-05-27 | 2021-05-27 | Microstrip antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215418583U true CN215418583U (en) | 2022-01-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121170158.5U Active CN215418583U (en) | 2021-05-27 | 2021-05-27 | Microstrip antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215418583U (en) |
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2021
- 2021-05-27 CN CN202121170158.5U patent/CN215418583U/en active Active
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