CN215418597U - Slot antenna - Google Patents
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- CN215418597U CN215418597U CN202120993443.0U CN202120993443U CN215418597U CN 215418597 U CN215418597 U CN 215418597U CN 202120993443 U CN202120993443 U CN 202120993443U CN 215418597 U CN215418597 U CN 215418597U
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Abstract
The utility model discloses a slot antenna. The slot antenna includes: a dielectric substrate; a metal ground plate located above the dielectric substrate; and the gap structure is formed in the metal grounding plate, wherein the gap structure comprises a U-shaped gap, and the lengths of two sides of the U-shaped gap are not consistent. The slot antenna can realize a broadband miniaturized antenna.
Description
Technical Field
The utility model relates to the technical field of antennas, in particular to a slot antenna.
Background
The rapid development of information technology brings great convenience to human life, changes the traditional production and life style of people, and realizes a plurality of technologies of good life in the future in a wireless mode. 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 propagates in space or conversely converting the electromagnetic wave which propagates in space into high-frequency current in the wire.
With the development of wireless communication technology, new functions of wireless Wi-Fi, bluetooth, intelligent voice, data transmission and the like in the intelligent communication device are continuously integrated, so that the composition of the wireless mobile communication device is more and more complex, and the wireless communication device is continuously developed towards miniaturization under the requirement of portability, which requires that components forming the wireless mobile communication device should complete multiple functions as much as possible. The number of systems simultaneously handled by the same terminal increases, and it is desired to realize a small antenna having a wider frequency band as the frequency band to be covered becomes wider.
Therefore, it is desirable to provide a novel slot antenna to realize a broadband miniaturized antenna.
SUMMERY OF THE UTILITY MODEL
In view of the above problems, an object of the present invention is to provide a slot antenna, thereby realizing a broadband miniaturized antenna.
According to an aspect of the present invention, there is provided a slot antenna including: a dielectric substrate; a metal ground plate located over the dielectric substrate; the gap structure is formed in the metal grounding plate, wherein the gap structure comprises a U-shaped gap, and the lengths of two sides of the U-shaped gap are not consistent.
Optionally, the gap structure includes four centrosymmetric U-shaped gaps.
Optionally, the widths of the short side, the bottom side and the long side of the U-shaped gap are sequentially increased.
Optionally, the gap structure further comprises a strip gap, and the long edge of the U-shaped gap is communicated with the first end of the strip gap.
Optionally, the slot antenna further includes: a feed structure connected to a second end of the strip-shaped slot.
Optionally, the feed structure includes first metal ring and second metal ring, the interior limit of first metal ring with the laminating of the outside of second metal ring, first metal ring with the opening relative distribution of second metal ring.
Optionally, the angles of the first metal ring and the second metal ring are the same and greater than 180 degrees.
Optionally, the slot antenna further includes: a feed line connected to the feed structure.
Optionally, the slot antenna further includes: and the parasitic unit is connected to the short side of the U-shaped gap.
Optionally, the parasitic unit is an L-shaped metal sheet, one end of the L-shaped metal sheet is connected to a short side of the U-shaped gap, and the other end of the L-shaped metal sheet is surrounded by the U-shaped gap.
The slot antenna provided by the utility model is provided with the slot structure comprising the U-shaped slot, the lengths of two sides of the U-shaped slot are different, the design of a broadband slot antenna is realized, the section of the slot antenna is small, and the broadband miniaturized antenna is realized.
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. 1 shows a schematic diagram of a slot antenna according to an embodiment of the utility model;
fig. 2 shows a reflection coefficient curve of a slot antenna according to an embodiment of the present invention;
fig. 3 shows a gain curve of a slot antenna according to an embodiment of the present invention;
fig. 4a and 4b show the radiation patterns of a slot antenna according to an embodiment of the utility model, respectively.
Detailed Description
The utility model will be described in more detail below with reference to the accompanying drawings. Like elements in the various figures are denoted by like reference numerals. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale. Moreover, certain well-known elements may not be shown in the figures.
In the following description, numerous specific details of the utility model, such as structure, materials, dimensions, processing techniques and techniques of the devices are described in order to provide a more thorough understanding of the utility model. However, as will be understood by those skilled in the art, the present invention may be practiced without these specific details.
It should be understood that, the connection/coupling of a and B in the embodiment of the present invention means that a and B may be coupled in series or in parallel, or a and B may be coupled through other devices, which is not limited in the embodiment of the present invention.
The slot antenna provided by the utility model can be applied to a transmitting end and a receiving end in various communication systems, such as radar equipment, communication equipment, navigation equipment, satellite ground stations, electronic countermeasure equipment and the like. The communication system is, for example but not limited to: a global system for mobile communications (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) system, a General Packet Radio Service (GPRS), a long term evolution (long term evolution, LTE) system, a Frequency Division Duplex (FDD) system, a LTE TDD (time division duplex), a universal mobile telecommunications system (universal mobile telecommunications system, UMTS), a Worldwide Interoperability for Microwave Access (WiMAX) communication system, a Wireless Local Area Network (WLAN), a fifth-generation wireless communication system, and the like.
A slot antenna is an antenna formed by slitting a conductor plane, and is also called a slot antenna. The working mode is as follows: electromagnetic waves in the system radiate electromagnetic waves to an outer space through the gap, or electromagnetic waves in the outer space enter the system through the gap. The conventional slot shape is elongated, with a length of about half a wavelength. For example, the slot may be fed by a transmission line across its narrow sides, or by a waveguide or resonant cavity, the slot being excited with a radio frequency electromagnetic field and radiating electromagnetic waves into space.
The slot antenna provided by the embodiment of the utility model is provided with the slot structure comprising the U-shaped slot, the lengths of two sides of the U-shaped slot are different, the design of the broadband slot antenna is realized, the section of the slot antenna is small, and the broadband miniaturized antenna is realized.
An embodiment of a power amplifier provided by the present invention will be described below with reference to the accompanying drawings.
Fig. 1 shows a schematic diagram of a slot antenna according to an embodiment of the utility model.
As shown in fig. 1, the slot antenna includes a dielectric substrate 1, a metal ground plate 2, and a slot structure 3 formed in the metal ground plate for converting a high-frequency oscillation signal into electromagnetic wave radiation or converting received electromagnetic wave radiation into a high-frequency oscillation signal.
The dielectric substrate 1 is, for example, a rectangular parallelepiped structure formed of one or more dielectric materials. The metal ground plate 2 is, for example, a structure formed of one or more metal conductor materials for reflecting electromagnetic waves, and the edge shape thereof is adapted to the shape of the dielectric substrate 1.
In the embodiment of the present invention, a slot structure 3 for radiating or receiving an electromagnetic wave is formed in the metallic ground plate 2. The slit structure 3 includes a U-shaped slit 31, and the lengths of both sides of the U-shaped slit are not the same, that is, the U-shaped slit 31 includes a short side, a bottom side, and a long side, and the extending direction of the short side and the extending direction of the long side of the U-shaped slit 31 are parallel to each other and are both perpendicular to the extending direction of the bottom side. Optionally, the widths of the short side, the bottom side and the long side of the U-shaped slit 31 are sequentially increased. In this embodiment, the slot structure 3 further comprises a strip slot 32, and the long side of the U-shaped slot 31 communicates with a first end of the strip slot 32. Optionally, four corners of the metal ground plate 2 are respectively provided with four slot structures 3, the four slot structures 3 are arranged in a central symmetrical structure with the center of the metal ground plate 2 as a center, specifically, any one of the slot structures 3 rotates by 90 degrees, 180 degrees and 270 degrees with the center of the metal ground plate 2 as a center to form other three slot structures 3.
As an example, the slot antenna further includes a feeding structure 4 disposed at a central region of the metal ground plane 2, and the feeding structure 4 is connected to the second end of the strip slot 32. In this example, the feeding structure 4 includes a first metal ring 41 and a second metal ring 42, an inner edge of the first metal ring 41 is attached to an outer edge of the second metal ring 42, and both the first metal ring 41 and the second metal ring 42 are non-complete rings, that is, both the first metal ring 41 and the second metal ring 42 include two open ends, and respective opening directions are distributed relatively. Optionally, the angles of the first metal ring and the second metal ring are the same and greater than 180 degrees, for example, 270 degrees, in other words, the opening angles of the first metal ring 41 and the second metal ring 42 are both 90 degrees.
Optionally, the slot antenna further includes a feeding line 5 disposed on the metal ground plate 2, the feeding line 5 is connected to the feeding structure 4 from a central point of one side of the metal ground plate 2, specifically, one open end of the first metal ring 41 connected to the feeding structure 4, and the feeding line 5 is located between two adjacent slot structures 3.
In a preferred embodiment the slot antenna further comprises a parasitic element 6 arranged on the metallic ground plane 2, the parasitic element 6 being connected to the short side of the U-shaped slot. As an example, the parasitic element 6 is an L-shaped metal sheet, one end of which is connected to the short side of the U-shaped slit 31 and the other end of which is surrounded by the U-shaped slit, and specifically, the L-shaped metal sheet includes two mutually perpendicular sides which are parallel to the bottom side and the long side of the U-shaped slit 31, respectively, one end of the L-shaped metal sheet partially intersects with the short side of the U-shaped slit 31, and the other end of the L-shaped metal sheet is close to the strip slit 32 and does not intersect with the strip slit 32. Optionally, four parasitic units 6 are further disposed at four corners of the metal ground plate 2, each parasitic unit 6 corresponds to one slot structure 3, the four parasitic units 6 are arranged in a central symmetric structure with the center of the metal ground plate 2 as a center, specifically, any one parasitic unit 6 rotates by 90 degrees, 180 degrees, and 270 degrees sequentially with the center of the metal ground plate 2 as a center to form the other three parasitic units 6.
The slot antenna provided by the embodiment of the utility model has the characteristics of good performance, low section and the like, the processing and manufacturing process of the slot antenna is mature, the production, manufacturing, operation and maintenance costs are low, and the slot antenna is easy to produce in batches. The embodiment of the utility model realizes the design of the broadband slot antenna by designing the tightly coupled arc feed structure and four groups of unequal-length U-shaped slots with rotationally symmetrical excitation centers. In addition, by designing the L-shaped parasitic element 6, the operating band of the slot antenna can be shifted to a low frequency band, and the antenna can be designed to be compact.
Fig. 2 shows a reflection coefficient curve of a slot antenna according to an embodiment of the present invention, and the horizontal axis of the graph shown in fig. 2 represents frequency and the vertical axis represents reflection coefficient.
Referring to fig. 1, based on the slot antenna shown in fig. 1, the power ratio of the reflection wave to the incident wave of the slot antenna, i.e., the return loss ratio, can be obtained under different operating frequencies according to the reflection coefficient of the slot antenna. Wherein, the smaller the reflection coefficient, the more energy the antenna radiates out.
As can be seen from fig. 2, the return loss of the slot antenna is less than-10 dB in the frequency band of 280MHz to 350 MHz. And the slot antenna has wider impedance working bandwidth, and the relative bandwidth reaches 19%.
Fig. 3 shows a gain curve of the slot antenna according to the embodiment of the present invention in the plane Phi of 0 °, and the horizontal axis of the graph shown in fig. 3 represents frequency and the vertical axis represents gain. As can be seen from fig. 3, the gain of the slot antenna in the frequency band from 280MHz to 100MHz is gradually reduced, but is greater than 1.5, which can meet the antenna operation requirement.
Fig. 4a and 4b show the radiation patterns of a slot antenna according to an embodiment of the utility model, respectively. Fig. 4a shows the radiation pattern of the slot antenna in the 280MHz band in the plane Phi of 0 ° and Phi of 180 °, and fig. 4a shows the radiation pattern of the slot antenna in the plane Phi of 90 ° and Phi of 270 ° and in the 280MHz band.
As can be seen from fig. 4a, the main lobe amplitude of the slot antenna is 3.72dB, and as can be seen from fig. 4b, the main lobe amplitude of the slot antenna is 3.86dB, so that the slot antenna can radiate or receive electromagnetic waves well in all directions, has omni-directionality, and can meet various working requirements.
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 slot antenna, comprising:
a dielectric substrate;
a metal ground plate located over the dielectric substrate;
a slot structure formed in the metal ground plate,
the gap structure comprises a U-shaped gap, and the lengths of the two sides of the U-shaped gap are not consistent.
2. The slot antenna of claim 1, wherein the slot structure comprises four centrally symmetric U-shaped slots.
3. The slot antenna of claim 1, wherein the widths of the short side, the bottom side and the long side of the U-shaped slot are gradually increased.
4. The slot antenna of claim 3, wherein the slot structure further comprises a strip slot, and wherein a long side of the U-shaped slot is in communication with a first end of the strip slot.
5. The slot antenna of claim 4, further comprising: a feed structure connected to a second end of the strip-shaped slot.
6. The slot antenna of claim 5, wherein the feeding structure comprises a first metal ring and a second metal ring, an inner edge of the first metal ring is attached to an outer edge of the second metal ring, and openings of the first metal ring and the second metal ring are distributed oppositely.
7. The slot antenna of claim 6, wherein the angle of the first metal loop and the second metal loop is the same and greater than 180 degrees.
8. The slot antenna of claim 5, further comprising: a feed line connected to the feed structure.
9. The slot antenna of claim 3, further comprising: a parasitic element connected to a short side of the U-shaped slot.
10. The slot antenna of claim 9, wherein the parasitic element is an L-shaped metal sheet, one end of the L-shaped metal sheet is connected to a short side of the U-shaped slot, and the other end is surrounded by the U-shaped slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120993443.0U CN215418597U (en) | 2021-05-11 | 2021-05-11 | Slot antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120993443.0U CN215418597U (en) | 2021-05-11 | 2021-05-11 | Slot antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215418597U true CN215418597U (en) | 2022-01-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120993443.0U Active CN215418597U (en) | 2021-05-11 | 2021-05-11 | Slot antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215418597U (en) |
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2021
- 2021-05-11 CN CN202120993443.0U patent/CN215418597U/en active Active
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