CN210866495U - Waveguide slot antenna array - Google Patents
Waveguide slot antenna array Download PDFInfo
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- CN210866495U CN210866495U CN201922498646.8U CN201922498646U CN210866495U CN 210866495 U CN210866495 U CN 210866495U CN 201922498646 U CN201922498646 U CN 201922498646U CN 210866495 U CN210866495 U CN 210866495U
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Abstract
The utility model discloses a waveguide slot antenna array, waveguide slot antenna array includes: the waveguide slot antenna comprises a radiation waveguide, and a plurality of radiation slots are arranged on the narrow edge of the radiation waveguide; and the plurality of radiation matching blocks are arranged on at least one radiation waveguide and are arranged at intervals with the radiation gaps on the radiation waveguide. The embodiment of the utility model provides a can increase the gain of waveguide gap antenna array, reduce the cross polarization component.
Description
Technical Field
The embodiment of the utility model provides a relate to the waveguide technique, especially relate to a waveguide slot antenna array.
Background
The waveguide slot antenna array has the advantages of high feed efficiency, large power capacity, easy realization of amplitude-phase distribution and the like, is a low-sidelobe antenna, and has wide application in the fields of modern microwave communication, radar and the like.
However, the existing waveguide slot antenna array has low gain and high cross polarization component, which limits further application of the waveguide slot antenna array.
SUMMERY OF THE UTILITY MODEL
The utility model provides a waveguide slot antenna array to improve waveguide slot antenna array's gain.
The embodiment of the utility model provides a waveguide slot antenna array, include: the waveguide slot antenna comprises a radiation waveguide, and a plurality of radiation slots are arranged on the narrow edge of the radiation waveguide; and the plurality of radiation matching blocks are arranged on at least one radiation waveguide and are arranged at intervals with the radiation gaps on the radiation waveguide.
Optionally, the plurality of waveguide slot antennas are arranged in parallel along a first direction, and each of the radiation waveguides is provided with a plurality of the radiation matching blocks.
Optionally, the radiation matching block protrudes from two sides of the narrow side of the radiation waveguide along the first direction.
Optionally, a gap exists between the corresponding radiation matching blocks on two adjacent radiation waveguides.
Optionally, the length of the slit along the first direction is 5% of the free space wavelength.
Optionally, along a second direction, a distance between centers of two adjacent radiation matching blocks is the same as a distance between centers of two adjacent radiation slits, wherein the second direction is parallel to an arrangement direction of the radiation matching blocks on one radiation waveguide.
Optionally, a gap between two adjacent radiation matching blocks along the second direction is less than half a free-space wavelength.
Optionally, the thickness of the radiation matching block in a direction perpendicular to the narrow side of the radiation waveguide is less than one quarter of a free-space wavelength.
Optionally, the waveguide slot antenna array further comprises a choke groove located between two adjacent waveguide slot antennas.
Optionally, the depth of the choke groove is one quarter of a free space wavelength.
The utility model discloses a waveguide slot antenna array includes a plurality of waveguide slot antennas, the waveguide slot antennas include radiation waveguide, the narrow edge of radiation waveguide is provided with a plurality of radiation slots; and the plurality of radiation matching blocks are arranged on at least one radiation waveguide and are arranged at intervals with the radiation gaps on the radiation waveguide. The radiation matching block can improve the current distribution on the surface of the radiation waveguide, so that the radiation gain of the radiation waveguide is improved, and the gain of the waveguide slot antenna array is higher.
Drawings
Fig. 1 is a schematic structural diagram of a waveguide slot antenna array according to an embodiment of the present invention;
fig. 2 is a top view of a waveguide slot antenna array according to an embodiment of the present invention;
fig. 3 is a side view of a waveguide slot antenna array according to an embodiment of the present invention;
fig. 4 is a front view of a waveguide slot antenna array according to an embodiment of the present invention;
fig. 5 is a voltage standing wave ratio result diagram of a waveguide slot antenna array according to an embodiment of the present invention;
fig. 6 is a directional diagram of a waveguide slot antenna array according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is the embodiment of the present invention provides a structural schematic diagram of a waveguide slot antenna array, fig. 2 is a plan view of a waveguide slot antenna array, which can be the plan view of fig. 1, and fig. 3 is the embodiment of the present invention provides a side view of a waveguide slot antenna array, which can be the side view of fig. 1, and fig. 4 is the embodiment of the present invention provides a main view of a waveguide slot antenna array, which can be the main view of fig. 1, and combines fig. 1 to fig. 4, the waveguide slot antenna array includes: the waveguide slot antenna comprises a plurality of waveguide slot antennas 10, each waveguide slot antenna comprises a radiation waveguide 101, and a plurality of radiation slots 102 are arranged on the narrow side of each radiation waveguide 101; and the plurality of radiation matching blocks 103 are arranged on at least one radiation waveguide 101 and are arranged at intervals with the radiation slots 102 of the radiation waveguide 101.
Specifically, the radiation waveguide 101 has a wide side and a narrow side, and excitation and outward radiation energy can be obtained by opening inclined radiation slots 102 on the narrow side of the radiation waveguide 101 so that the radiation slots cut off surface current of the radiation waveguide; the length of the radiation slot 102 is the resonance length (half wavelength), wherein the wavelength is the wavelength of the electromagnetic wave emitted by the microwave source propagating in the waveguide, and the width of the radiation slot 102 is much smaller than the resonance length; on the same radiation waveguide, the center distance between adjacent radiation slots 102 is half of the waveguide wavelength, and the radiation slots 102 can obtain in-phase excitation every half of the waveguide wavelength. By arranging the radiation matching block on the radiation waveguide 101, the radiation matching block 101 and the radiation slot 102 are arranged at intervals, that is, the radiation matching block 101 and the radiation slot are positioned on the same side, the radiation matching block 101 can be of a metal structure, the material of the radiation matching block can be the same as that of the radiation waveguide 101, and if the radiation matching block and the radiation slot both use aluminum, the radiation matching block can improve the current distribution on the surface of the radiation waveguide, so that the radiation gain of the radiation waveguide is improved, and the gain of the waveguide slot antenna array is higher.
According to the technical scheme of the embodiment, the adopted waveguide slot antenna array comprises a plurality of waveguide slot antennas, each waveguide slot antenna comprises a radiation waveguide, and a plurality of radiation slots are formed in the narrow edge of the radiation waveguide; and the plurality of radiation matching blocks are arranged on at least one radiation waveguide and are arranged at intervals with the radiation gaps on the radiation waveguide. The radiation matching block can improve the current distribution on the surface of the radiation waveguide, so that the radiation gain of the radiation waveguide is improved, and the gain of the waveguide slot antenna array is higher.
It should be noted that, in the embodiment of the present invention, each waveguide slot antenna may include a feed module 110, the feed module 110 may include a main waveguide, a side diaphragm, a main diaphragm, a branch waveguide, etc., the structure of which is well known to those skilled in the art, and will not be described herein again, after electromagnetic wave energy enters the antenna port through the main waveguide, the electromagnetic wave energy is equally divided in the branch waveguide through the allocation function of the power division structure formed by the side diaphragm and the main diaphragm, and the electromagnetic field distributed by the standing wave in the branch waveguide couples the energy to the waveguide slot 102, thereby radiating the electromagnetic wave outwards.
Optionally, the plurality of waveguide slot antennas are arranged in parallel along the first direction X, and each radiation waveguide 101 is provided with a plurality of radiation matching blocks 103.
Specifically, the waveguide slot antennas 10 are arranged in parallel, so that the directivity of the waveguide slot antenna array for radiating electromagnetic waves can be improved, and the radiation intensity can be enhanced. Each radiation waveguide is provided with a plurality of radiation matching blocks, and the surface current of the radiation waveguide 101 in each waveguide slot antenna 10 can be improved, that is, the radiation gain of each radiation waveguide 101 can be improved, so that the gain of the waveguide slot array antenna can be further improved.
Alternatively, with continued reference to fig. 1-4, the radiation matching block 103 protrudes from both sides of the narrow side of the radiation waveguide 101 along the first direction X.
Specifically, the radiation matching block 103 protrudes from two sides of the narrow side of the radiation waveguide 101, and can increase the radiation aperture of the radiation waveguide 101, thereby further improving the gain of the radiation waveguide 101 and the gain of the waveguide slot antenna array.
Optionally, there is a gap 104 between the corresponding radiation matching blocks 103 on two adjacent radiation waveguides 101.
Specifically, each radiation waveguide 101 is provided with the same number of radiation matching blocks 103, the arrangement positions of the radiation matching blocks 103 on each radiation waveguide 101 are also the same, and the radiation matching blocks 103 at the same position on the adjacent radiation waveguides 101 are opposite, and a gap is arranged between the two radiation matching blocks 103, so that a capacitive structure can be formed, which is equivalent to increasing the effective radiation area of the waveguide gap antenna array front, thereby generating the effects of optimizing the antenna array gain and improving the front efficiency.
Optionally, the length C of the slot along the first direction X is 5% of the free space wavelength.
Specifically, the wavelength of free space can be understood as the central wavelength of this waveguide slot antenna array work, that is to say the free space wavelength that the electromagnetic wave wavelength that is produced by the microwave source corresponds, and this free space wavelength can be according to the demand and decide, and the free space wavelength that different application fields correspond is probably different, the embodiment of the utility model provides a do not specifically limit to this. The length C of the gap is also the distance between the two corresponding radiation matching blocks, and the effective radiation area of the waveguide gap antenna array surface can be greatly increased by setting the length C to be 5% of the free space wavelength, so that the effects of optimizing the antenna array gain and improving the efficiency of the array surface are achieved.
Optionally, the distance between the centers of two adjacent radiation matching blocks 103 is the same as the distance between the centers of two adjacent radiation slots 102 along a second direction Y, wherein the second direction Y is parallel to the arrangement direction of the radiation matching blocks 103 on one radiation waveguide 101.
Specifically, the radiation matching block 103 is a block structure, the center of which is the geometric center of the block structure, and the distance between the centers of two adjacent radiation slots 102 is half of the waveguide wavelength, that is, the distance between two adjacent radiation matching blocks 103 on the same radiation waveguide 101 is fixed to be half of the waveguide wavelength, so that the gain of the waveguide slot antenna array can be greatly improved.
Optionally, along the second direction Y, a gap between two adjacent radiation matching blocks 103 is less than half of a free-space wavelength.
With this arrangement, the main polarization component along the radiation waveguide 101 propagates in a free space mode, and the cross polarization component in the direction perpendicular to the radiation waveguide 101 restricts the cross polarization component generated by the waveguide slot array antenna in a waveguide suppression manner, thereby improving the gain of the waveguide slot array antenna.
Optionally, the thickness of the radiation matching block in a direction Z perpendicular to the narrow side of the radiation waveguide is less than one quarter of the free-space wavelength.
Specifically, if the thickness H of the radiation matching block 103 is too large, not only the overall thickness of the waveguide slot antenna array is increased, but also the gain may not be significantly increased, and by setting the thickness to be less than a quarter of the free space wavelength, the attenuation of the cross polarization component can be made larger, that is, the cross polarization component can be better suppressed.
Optionally, the waveguide slot antenna array further comprises a choke groove 105 located between two adjacent waveguide slot antennas.
Specifically, the choke groove 105 may be used to maintain electrical continuity of the radiation waveguide, and reduce a parameter degradation phenomenon caused by discontinuity, thereby improving stability of the waveguide slot antenna array. Illustratively, the depth of the choke groove is one quarter of the free space wavelength.
The present invention is described in detail with reference to the following specific examples, in this example, the center frequency is set to 7.15GHz, the corresponding free space wavelength is 41.96mm, the corresponding waveguide wavelength is 61.895mm, the distance between the centers of two adjacent radiation matching blocks is set to 18.19mm, the thickness of the radiation matching block is set to 9.57mm, and the length of the slot is correspondingly equal to 2.11mm, as shown in fig. 5 and 6 by verification, wherein fig. 5 is a graph showing the voltage standing wave ratio of a waveguide slot antenna array provided by an embodiment of the present invention, fig. 6 is a directional diagram of a waveguide slot antenna array provided by an embodiment of the present invention, wherein a first curve 201 shows an X gain when the phase is 0 degree, a second curve 202 shows an X gain when the phase is 90 degrees, a third curve 203 shows a Y gain when the phase is 0 degree, a fourth curve 204 shows a Y gain when the phase is 0 degree, as can be seen from fig. 5 and 6, in the technical solution of this embodiment, when the center frequency is 7.15GHz, the gain of the waveguide slot antenna array is high, and in the second curve 202, the gain of the radiation direction of 0 degree can reach 13.8dB, the gain is high, and the main side lobe is only 1.76dB, that is, the cross polarization component is low, and the performance of the waveguide slot antenna array is good.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (10)
1. A waveguide slot antenna array, comprising:
the waveguide slot antenna comprises a radiation waveguide, and a plurality of radiation slots are arranged on the narrow edge of the radiation waveguide;
and the plurality of radiation matching blocks are arranged on at least one radiation waveguide and are arranged at intervals with the radiation gaps on the radiation waveguide.
2. The waveguide slot antenna array of claim 1, wherein the plurality of waveguide slot antennas are arranged in parallel along a first direction, and a plurality of the radiation matching blocks are disposed on each of the radiation waveguides.
3. The waveguide slot antenna array of claim 2 wherein the radiation matching block protrudes from both sides of the narrow side of the radiation waveguide along the first direction.
4. The waveguide slot antenna array of claim 3 wherein a slot exists between corresponding ones of the radiation matching blocks on two adjacent ones of the radiation waveguides.
5. The waveguide slot antenna array of claim 4 wherein the length of the slot along the first direction is 5% of the free space wavelength.
6. The waveguide slot antenna array of claim 1, wherein a distance between centers of two adjacent radiation matching blocks is the same as a distance between centers of two adjacent radiation slots along a second direction, wherein the second direction is parallel to an arrangement direction of the radiation matching blocks on one of the radiation waveguides.
7. The waveguide slot antenna array of claim 6 wherein a gap between adjacent ones of the radiation matching blocks along the second direction is less than one-half of a free-space wavelength.
8. The waveguide slot antenna array of claim 1 wherein the thickness of the radiation matching block in a direction perpendicular to the narrow side of the radiation waveguide is less than one quarter of a free-space wavelength.
9. The waveguide slot antenna array of claim 2, wherein the waveguide slot antenna array further comprises a choke groove between two adjacent waveguide slot antennas.
10. The waveguide slot antenna array of claim 9 wherein the depth of the choke slot is one quarter of a free space wavelength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922498646.8U CN210866495U (en) | 2019-12-31 | 2019-12-31 | Waveguide slot antenna array |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922498646.8U CN210866495U (en) | 2019-12-31 | 2019-12-31 | Waveguide slot antenna array |
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| CN210866495U true CN210866495U (en) | 2020-06-26 |
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| CN201922498646.8U Active CN210866495U (en) | 2019-12-31 | 2019-12-31 | Waveguide slot antenna array |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113178708A (en) * | 2021-05-11 | 2021-07-27 | 西安电子科技大学 | Dual-polarization waveguide slot array antenna |
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2019
- 2019-12-31 CN CN201922498646.8U patent/CN210866495U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113178708A (en) * | 2021-05-11 | 2021-07-27 | 西安电子科技大学 | Dual-polarization waveguide slot array antenna |
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| CB03 | Change of inventor or designer information |
Inventor after: Sun Xiaoyu Inventor after: Li Jie Inventor after: Wang Dong Inventor before: Sun Xiaoyu Inventor before: Li Jie Inventor before: Wang Dong Inventor before: She Xiaohui |
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| CB03 | Change of inventor or designer information |