CN215989232U - Antenna and antenna array - Google Patents
Antenna and antenna array Download PDFInfo
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- CN215989232U CN215989232U CN202121891800.9U CN202121891800U CN215989232U CN 215989232 U CN215989232 U CN 215989232U CN 202121891800 U CN202121891800 U CN 202121891800U CN 215989232 U CN215989232 U CN 215989232U
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Abstract
The utility model discloses an antenna and an antenna array. The antenna includes: the antenna comprises a radiation patch, a first grounding layer, a feeder line, a dielectric substrate and a second grounding layer; the radiation patch, the first ground layer, the feeder line and the second ground layer are arranged at intervals from top to bottom, and the medium substrate is arranged in the interval area; the first ground layer is provided with a gap, the position of the gap corresponds to that of the radiation patch, and the feeder line couples a signal to the radiation patch through the gap. The utility model feeds power in a gap coupling mode, the opening is arranged on the radiation patch to change the current mode on the radiation patch, and the included angle between the opening and the gap is adjusted, so that circular polarization transmission can be realized.
Description
Technical Field
The present invention relates to the field of radio frequency technologies, and in particular, to an antenna and an antenna array.
Background
The antenna is used as the front end of the wireless communication system and is responsible for receiving and transmitting signals in the communication system. With the continuous development of wireless communication technology, the requirements for antenna performance are also increasing. Due to the special polarization characteristic of the circularly polarized antenna, the transmitted electromagnetic wave can be received by the antenna with any linear polarization and can also be received by the antenna with any linear polarization, and the problem of polarization mismatch in the linearly polarized antenna is solved. In addition, the circularly polarized antenna can reduce the influence of the faraday rotation effect and the radial effect. Therefore, circularly polarized antennas are widely used in the fields of radio frequency identification, radar, satellite communication, and the like. In the field of satellite communications, antennas having a wide frequency band and a high gain are required.
The conventional circularly polarized microstrip antenna has difficulty in realizing high gain due to the limitation of its planar structure.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides an antenna and an antenna array, which effectively solve the problem that the circularly polarized antenna is difficult to realize higher gain due to the limitation of the plane structure of the circularly polarized antenna.
According to an aspect of the present invention, an embodiment of the present invention provides an antenna, including a radiation structure and a feed structure, the radiation structure and the feed structure being respectively disposed on both sides of a first substrate; the radiation structure comprises a radiation patch and a first metal layer, and the radiation patch and the first metal layer are respectively arranged on two sides of the second substrate; the feed structure comprises a feed line and a second metal layer, and the feed line and the second metal layer are respectively arranged on two sides of the third substrate; the first metal layer is provided with a gap, the position of the gap corresponds to the position of the radiation patch, and the feeder line is electromagnetically coupled with the radiation patch through the gap.
Further, the radiation patch is a metal patch in an axisymmetric shape.
Further, the radiation patch is a circular metal patch having a missing area.
Further, the radiation patch has two axisymmetric rectangular openings.
Further, the radiation patch has a slit passing through a center of the circle and penetrating the radiation patch, the slit dividing the radiation patch into two arcuate portions.
Further, a preset included angle is formed between the symmetry axis of the two openings or the narrow slits and the extending direction of the slits.
Further, the antenna further includes: and the adjusting branch is connected with the feeder line, and the feeder line is matched with the impedance of the antenna through the adjusting branch.
Further, the feeder line is a microstrip feeder line, the microstrip feeder line is perpendicular to the slot, and the adjusting branch is parallel to the slot.
According to another aspect of the present invention, an array antenna is provided in an embodiment of the present invention, including the antenna according to any embodiment of the present invention, where the plurality of antennas are arranged in an array.
Further, the antennas are connected in a series feed manner, and both the distance between the radiation patches of two adjacent antennas and the distance between the slots of two adjacent antennas are a waveguide wavelength of the feed line.
The utility model has the advantages that the feed is carried out in a gap coupling mode, the missing area is arranged on the radiation patch to change the current mode on the radiation patch, and the included angle between the missing area and the gap is adjusted, so that the circular polarization emission can be realized.
Drawings
The technical solution and other advantages of the present invention will become apparent from the following detailed description of specific embodiments of the present invention, which is to be read in connection with the accompanying drawings.
Fig. 1 is a schematic diagram of an antenna structure according to an embodiment of the present invention.
Fig. 2 is a top view of an antenna according to an embodiment of the present invention.
FIG. 3 is a cross-sectional view taken along line A1-A2 of FIG. 2.
Fig. 4 is a simulation diagram of S parameters of an antenna according to an embodiment of the present invention.
Fig. 5 is a diagram of simulation results of antenna axial ratio according to a first embodiment of the present invention.
Fig. 6 is a schematic diagram of an antenna structure according to a second embodiment of the present invention.
Fig. 7 is a top view of an antenna according to an embodiment of the present invention.
Fig. 8 is a simulation diagram of S parameters of an antenna according to an embodiment of the present invention.
Fig. 9 is a diagram of simulation results of antenna axial ratio according to a first embodiment of the present invention.
Fig. 10 is a schematic structural diagram of an array antenna according to a third embodiment of the present invention.
Fig. 11 is a simulation diagram of S-parameters of an array antenna according to a third embodiment of the present invention.
Fig. 12 is a diagram of simulation results of axial ratio of the array antenna according to the third embodiment of the present invention.
Fig. 13 is a simulation diagram of an EH plane pattern of an array antenna according to a third embodiment of the present invention.
Fig. 14 is a schematic structural diagram of an array antenna according to a fourth embodiment of the present invention.
Fig. 15 is a simulation diagram of S-parameters of an array antenna according to a fourth embodiment of the present invention.
Fig. 16 is a diagram showing simulation results of the axial ratio of the array antenna according to the fourth embodiment of the present invention.
Fig. 17 is a simulation diagram of an EH plane pattern of an array antenna according to a fourth embodiment of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
As shown in fig. 1, an antenna provided in an embodiment of the present invention includes: a radiating structure and a feed structure.
With combined reference to figures 2 and 3,
the substrate 50 includes a first substrate 52, a second substrate 51, and a third substrate 53. The radiating structure and the feeding structure are disposed on both sides of the first substrate 52, respectively. The radiating structure comprises a radiating patch 10 and a first metal layer 20. The radiation patch 10 and the first metal layer 20 are respectively disposed on both sides of the second substrate 51.
The feeding structure includes a feeding line 30 and a second metal layer 40, and the feeding line 30 and the second metal layer 40 are respectively disposed on both sides of a third substrate 53.
The radiation patch 10 is a metal patch in an axisymmetric shape, and the radiation patch 10 is a circular metal patch having a missing region. In this embodiment, the missing region is two rectangular openings, and the two rectangular openings are arranged in an axisymmetric manner.
A slot 21 is formed in the first metal layer 20, the position of the slot 21 corresponds to the position of the radiation patch 10, and the feed line 30 is electromagnetically coupled with the radiation patch 10 through the slot 21.
By adjusting the included angle between the two axisymmetric rectangular openings and the slot 21, circularly polarized transmission of the antenna can be realized.
The antenna further includes: and the adjusting branch 31, the adjusting branch 31 is connected with the feeder line 30, and the feeder line 30 matches the antenna impedance through the adjusting branch 31. The feed line 30 is a microstrip feed line, and the microstrip feed line is perpendicular to the slot 21, and the adjustment stub 31 is parallel to the slot 21.
Fig. 4 and 5 are an antenna S parameter simulation diagram and an antenna axial ratio simulation diagram, respectively. In the first embodiment, feeding is performed in a slot coupling manner, two axisymmetric rectangular openings are arranged on the radiation patch to change a current mode on the radiation patch, and an included angle between the two axisymmetric rectangular openings and the slot is adjusted to realize circular polarization transmission.
As shown in fig. 6, an antenna provided in the second embodiment of the present invention includes: a radiating structure and a feed structure.
Referring to fig. 7 in combination, the substrate 50 includes a first substrate 52, a second substrate 51 and a third substrate 53. The radiating structure and the feeding structure are disposed on both sides of the first substrate 52, respectively. The radiating structure comprises a radiating patch 10 and a first metal layer 20. The radiation patch 10 and the first metal layer 20 are respectively disposed on both sides of the second substrate 51.
The radiation patch 10 is a metal patch in an axisymmetric shape, and the radiation patch 10 is a circular metal patch having a missing region. In this embodiment, the missing region is a narrow slit, and the narrow slit penetrates the radiation patch 10 through the center of the circle, dividing the radiation patch 10 into two arcuate portions.
A slot 21 is formed in the first metal layer 20, the position of the slot 21 corresponds to the position of the radiation patch 10, and the feed line 30 is electromagnetically coupled with the radiation patch 10 through the slot 21.
By adjusting the included angle between the two axisymmetric rectangular openings and the slot 21, circularly polarized transmission of the antenna can be realized.
The antenna further includes: and the adjusting branch 31, the adjusting branch 31 is connected with the feeder line 30, and the feeder line 30 matches the antenna impedance through the adjusting branch 31. The feed line 30 is a microstrip feed line, and the microstrip feed line is perpendicular to the slot 21, and the adjustment stub 31 is parallel to the slot 21.
Fig. 8 and 9 are an antenna S-parameter simulation diagram and an antenna axial ratio simulation diagram, respectively. In the embodiment, the feed is performed in a slot coupling mode, two axisymmetric rectangular openings are arranged on the radiation patch to change a current mode on the radiation patch, and an included angle between the two axisymmetric rectangular openings and the slot is adjusted, so that circularly polarized transmission can be realized.
As shown in fig. 10, an antenna array provided in a third embodiment of the present invention includes: a plurality of the antennas of the above embodiments, the plurality of antennas being arranged in an array.
The antenna includes: a radiating structure and a feed structure.
The substrate 50 includes a first substrate 52, a second substrate 51, and a third substrate 53. The radiating structure and the feeding structure are disposed on both sides of the first substrate 52, respectively. The radiating structure comprises a radiating patch 10 and a first metal layer 20. The radiation patch 10 and the first metal layer 20 are respectively disposed on both sides of the second substrate 51.
The feeding structure includes a feeding line 30 and a second metal layer 40, and the feeding line 30 and the second metal layer 40 are respectively disposed on both sides of a third substrate 53.
The radiation patch 10 is a metal patch in an axisymmetric shape, and the radiation patch 10 is a circular metal patch having a missing region. In this embodiment, the missing region is two rectangular openings, and the two rectangular openings are arranged in an axisymmetric manner.
A slot 21 is formed in the first metal layer 20, the position of the slot 21 corresponds to the position of the radiation patch 10, and the feed line 30 is electromagnetically coupled with the radiation patch 10 through the slot 21.
By adjusting the included angle between the two axisymmetric rectangular openings and the slot 21, circularly polarized transmission of the antenna can be realized.
The antenna further includes: and the adjusting branch 31, the adjusting branch 31 is connected with the feeder line 30, and the feeder line 30 matches the antenna impedance through the adjusting branch 31. The feed line 30 is a microstrip feed line, and the microstrip feed line is perpendicular to the slot 21, and the adjustment stub 31 is parallel to the slot 21.
Fig. 11, 12 and 13 are an array antenna S parameter simulation diagram, an array antenna axial ratio simulation diagram and an array antenna EH surface pattern simulation diagram, respectively. The embodiment performs feed in a slot coupling mode, two axisymmetric rectangular openings are arranged on the radiation patch to change a current mode on the radiation patch, and an included angle between the two axisymmetric rectangular openings and the slot is adjusted to realize circular polarization transmission.
As shown in fig. 14, an antenna array provided in the fourth embodiment of the present invention includes: a plurality of the antennas of the above embodiments, the plurality of antennas being arranged in an array.
The antenna includes: a radiating structure and a feed structure.
The substrate 50 includes a first substrate 52, a second substrate 51, and a third substrate 53. The radiating structure and the feeding structure are disposed on both sides of the first substrate 52, respectively. The radiating structure comprises a radiating patch 10 and a first metal layer 20. The radiation patch 10 and the first metal layer 20 are respectively disposed on both sides of the second substrate 51.
The feeding structure includes a feeding line 30 and a second metal layer 40, and the feeding line 30 and the second metal layer 40 are respectively disposed on both sides of a third substrate 53.
The radiation patch 10 is a metal patch in an axisymmetric shape, and the radiation patch 10 is a circular metal patch having a missing region. In this embodiment, the missing region is a narrow slit, and the narrow slit penetrates the radiation patch 10 through the center of the circle, dividing the radiation patch 10 into two arcuate portions.
A slot 21 is formed in the first metal layer 20, the position of the slot 21 corresponds to the position of the radiation patch 10, and the feed line 30 is electromagnetically coupled with the radiation patch 10 through the slot 21.
By adjusting the included angle between the two axisymmetric rectangular openings and the slot 21, circularly polarized transmission of the antenna can be realized.
The antenna further includes: and the adjusting branch 31, the adjusting branch 31 is connected with the feeder line 30, and the feeder line 30 matches the antenna impedance through the adjusting branch 31. The feed line 30 is a microstrip feed line, and the microstrip feed line is perpendicular to the slot 21, and the adjustment stub 31 is parallel to the slot 21.
Fig. 15, 16 and 17 are an array antenna S parameter simulation diagram, an array antenna axial ratio simulation diagram and an array antenna EH surface pattern simulation diagram, respectively. The embodiment performs feed in a way of cross gap coupling, two axisymmetric rectangular openings are arranged on the radiation patch to change the current mode on the radiation patch, and the included angle between the two axisymmetric rectangular openings and the gap is adjusted, so that circular polarization transmission can be realized.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.
Claims (11)
1. An antenna, characterized in that the antenna comprises a radiation structure and a feed structure, the radiation structure and the feed structure are respectively arranged on two sides of a first substrate;
the radiation structure comprises a radiation patch and a first metal layer, and the radiation patch and the first metal layer are respectively arranged on two sides of the second substrate;
the feed structure comprises a feed line and a second metal layer, and the feed line and the second metal layer are respectively arranged on two sides of the third substrate;
the first metal layer is provided with a gap, the position of the gap corresponds to the position of the radiation patch, and the feeder line is electromagnetically coupled with the radiation patch through the gap.
2. The antenna of claim 1, wherein the radiating patch is a metal patch in an axisymmetric shape.
3. The antenna of claim 2, wherein the radiating patch is a circular metal patch having a missing area.
4. The antenna of claim 3, wherein the radiating patch has two axisymmetric rectangular openings.
5. The antenna of claim 3, wherein the radiating patch has a slot passing through a center of the circle and extending through the radiating patch, the slot dividing the radiating patch into two arcuate portions.
6. The antenna of claim 4, wherein the symmetry axes of the two openings have a predetermined angle with the extending direction of the slot.
7. An antenna according to claim 5, characterized in that the symmetry axis of the slot has a predetermined angle with the extension direction of the slot.
8. The antenna of claim 6 or 7, further comprising: and the adjusting branch is connected with the feeder line, and the feeder line is matched with the impedance of the antenna through the adjusting branch.
9. The antenna of claim 8, wherein the feed line is a microstrip feed line, and wherein the microstrip feed line is perpendicular to the slot, and wherein the tuning stub is parallel to the slot.
10. An array antenna comprising a plurality of antennas as claimed in any one of claims 1 to 9, the plurality of antennas being arranged in an array.
11. The array antenna of claim 10, wherein the plurality of antennas are connected by series feeding, and the spacing between the radiating patches of two adjacent antennas and the spacing between the slots of two adjacent antennas are both one waveguide wavelength of the feeding line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121891800.9U CN215989232U (en) | 2021-08-10 | 2021-08-10 | Antenna and antenna array |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121891800.9U CN215989232U (en) | 2021-08-10 | 2021-08-10 | Antenna and antenna array |
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| Publication Number | Publication Date |
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| CN215989232U true CN215989232U (en) | 2022-03-08 |
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| CN202121891800.9U Active CN215989232U (en) | 2021-08-10 | 2021-08-10 | Antenna and antenna array |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116995424A (en) * | 2023-08-14 | 2023-11-03 | 南通大学 | Circularly polarized decoupling patch antenna |
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2021
- 2021-08-10 CN CN202121891800.9U patent/CN215989232U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116995424A (en) * | 2023-08-14 | 2023-11-03 | 南通大学 | Circularly polarized decoupling patch antenna |
| CN116995424B (en) * | 2023-08-14 | 2024-03-15 | 南通大学 | Circularly polarized decoupling patch antenna |
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