CN114361803A - Waveguide slot antenna with frequency scanning function - Google Patents
Waveguide slot antenna with frequency scanning function Download PDFInfo
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- CN114361803A CN114361803A CN202111597041.XA CN202111597041A CN114361803A CN 114361803 A CN114361803 A CN 114361803A CN 202111597041 A CN202111597041 A CN 202111597041A CN 114361803 A CN114361803 A CN 114361803A
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Abstract
The invention discloses a waveguide slot antenna with frequency scanning, and belongs to the technical field of wireless communication. The antenna comprises a first structural member, a second structural member, a front wall surface and a rear wall surface, wherein the first structural member is opposite to the second structural member, and the front wall surface and the rear wall surface are tightly attached to two sides of the first structural member and the second structural member to form a waveguide structure; the lower surface of the first structural member is provided with a plurality of long bulges in an array along the extension direction of the first structural member, and the long bulges are perpendicular to the extension direction of the first structural member; the upper surface of the second structural member is arrayed with a plurality of rectangular ridge structures along the extending direction of the second structural member, and the rectangular ridge structures and the long bulges are arranged at intervals in the waveguide structure; the upper surface of the first structural member is provided with a plurality of waveguide radiation gaps, the waveguide radiation gaps correspond to the rectangular ridge structures one by one, and the waveguide radiation gaps are positioned right above the rectangular ridge structures; the rectangular ridge structure in the waveguide structure and the inner cavity between the long bulges form a snake-shaped slow wave line. The invention has the advantages of simple structure, low manufacturing cost and the like.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a waveguide slot antenna with frequency scanning.
Background
The prior waveguide slot antenna with similar frequency scanning mainly has the following implementation forms, and has certain defects in performance although having characteristics.
The Chinese patent No. CN201910673117.9, entitled Serial feed waveguide Slot frequency scanning antenna with Large scanning Angle within Limited Bandwidth, discloses a Serial feed waveguide Slot frequency scanning antenna with Large scanning Angle within Limited Bandwidth, comprising a waveguide slow wave structure, a slot plate and a horn structure, wherein the waveguide slow wave structure consists of a straight waveguide segment and an elbow connected with the straight waveguide segment, the elbow is a 180-degree elbow, and the elbow is provided with different chamfers; the horn structure consists of a horn mouth and a clapboard. The structure of the form is complex, and the structures such as a horn, an elbow and the like are introduced, so that the cost is high and the operation is complex.
Chinese patent No. CN202010474121.5, entitled "a frequency scanning antenna", discloses a horn array including waveguide slow wave line and connected with the waveguide slow wave line, the horn array is used for the radiation of waveguide slow wave line signals, the horn array includes the horn structure that sets gradually along the length direction of the waveguide slow wave line, each horn structure is connected with the waveguide slow wave line respectively, the bottom opening size of the horn structure towards the waveguide slow wave line is smaller than the top opening size. The invention sets the horn array for signal radiation into independent horn structures, and the horn structures interact with each other to realize the radiation of signals. This form involves a horn structure and is complicated.
Disclosure of Invention
In view of the above, the present invention provides a frequency-swept waveguide slot antenna. The waveguide slot antenna has the advantages of simple structure, low manufacturing cost and the like.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a waveguide slot antenna with frequency scanning comprises a first structural member, a second structural member, a front wall surface and a rear wall surface, wherein the first structural member is opposite to the second structural member, and the front wall surface and the rear wall surface are tightly attached to two sides of the first structural member and the second structural member to form a waveguide structure; the lower surface of the first structural member is provided with a plurality of long bulges in an array along the extension direction of the first structural member, and the long bulges are perpendicular to the extension direction of the first structural member; the upper surface of the second structural member is provided with a plurality of rectangular ridge structures in an array along the extending direction of the second structural member, and the rectangular ridge structures and the long bulges are arranged at intervals in the waveguide structure; the upper surface of the first structural member is provided with a plurality of waveguide radiation gaps, the waveguide radiation gaps correspond to the rectangular ridge structures one by one, and the waveguide radiation gaps are positioned right above the rectangular ridge structures; and an inner cavity between the rectangular ridge structure and the long bulge in the waveguide structure forms a snake-shaped slow wave line.
Furthermore, the rectangular ridge structure and the long protrusions are tightly attached to the front wall surface and the rear wall surface.
Furthermore, one end of the snakelike slow wave line is provided with a waveguide coaxial conversion port for feeding; and the other end of the serpentine waveguide is provided with an absorption load for absorbing the redundant electromagnetic energy which is not radiated out.
The invention adopts the technical scheme to produce the beneficial effects that:
1. the invention has simple and convenient structure, and does not adopt additional components such as a loudspeaker and the like to realize the frequency scanning function.
2. The waveguide cavity is internally provided with a rectangular ridge structure, and the aim is to miniaturize the whole waveguide structure;
3. the waveguide slot is a single-side slot, so that the low frequency is not easy to generate lobe, and the waveguide slot is more convenient to combine with other parts into a network.
Drawings
FIG. 1 is a structural sectional view of an embodiment of the present invention.
Fig. 2 is a top view of a structure of an embodiment of the present invention.
Fig. 3 is a structural side view of an embodiment of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments.
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
A waveguide slot antenna with frequency scanning comprises a first structural member, a second structural member, a front wall surface and a rear wall surface, wherein the first structural member is opposite to the second structural member, and the front wall surface and the rear wall surface are tightly attached to two sides of the first structural member and the second structural member to form a waveguide structure; the lower surface of the first structural member is provided with a plurality of long bulges in an array along the extension direction of the first structural member, and the long bulges are perpendicular to the extension direction of the first structural member; the upper surface of the second structural member is provided with a plurality of rectangular ridge structures in an array along the extending direction of the second structural member, and the rectangular ridge structures and the long bulges are arranged at intervals in the waveguide structure; the upper surface of the first structural member is provided with a plurality of waveguide radiation gaps, the waveguide radiation gaps correspond to the rectangular ridge structures one by one, and the waveguide radiation gaps are positioned right above the rectangular ridge structures; and an inner cavity between the rectangular ridge structure and the long bulge in the waveguide structure forms a snake-shaped slow wave line.
Furthermore, the rectangular ridge structure and the long protrusions are tightly attached to the front wall surface and the rear wall surface.
Furthermore, one end of the snakelike slow wave line is provided with a waveguide coaxial conversion port for feeding; and the other end of the serpentine waveguide is provided with an absorption load for absorbing the redundant electromagnetic energy which is not radiated out.
The following is a more specific example:
this embodiment includes waveguide radiation gap, snakelike slow wave line, rectangular ridge structure, waveguide coaxial conversion feed port and absorption load, waveguide radiation gap is unilateral and cracks, it is all in the homonymy of waveguide central line also to be all the gaps, a radiation for waveguide slow wave line signal, be linked together with the waveguide gap for snakelike slow wave line structure, the intracavity of waveguide has the rectangle to add the ridge structure simultaneously, the whole waveguide structure of aim at miniaturization, waveguide slot antenna's one end is carried out the feed by waveguide coaxial conversion port, the other end has absorption load, can absorb unnecessary electromagnetic energy that does not radiate out.
The waveguide gaps correspond to the snakelike slow wave line structures one to one.
The rectangular ridge structure penetrates through the whole waveguide serpentine slow wave structure.
Referring to fig. 1 to 3, the present embodiment includes a waveguide radiation slot 1, a serpentine slow-wave line 5, a rectangular ridge structure 4, a waveguide coaxial conversion feed port 3, and an absorption load 2, where the waveguide radiation slot is a single-sided slot, that is, all slots are on the same side of a waveguide centerline, and are used for radiation of waveguide slow-wave line signals, the slot is communicated with the waveguide slot and is in a serpentine slow-wave line structure, and meanwhile, a rectangular ridge structure is also provided in the waveguide cavity, so as to miniaturize the whole waveguide structure, one end of the waveguide slot antenna is fed by the waveguide coaxial conversion port, and the other end of the waveguide slot antenna is provided with an absorption load, which can absorb redundant electromagnetic energy that is not radiated out.
Working principle of the invention
The snakelike waveguide slow wave line structure increases the transmission distance of electromagnetic waves in the waveguide, thereby amplifying the frequency dispersion characteristic of the traveling wave array antenna, adjusting the length of the slow wave line structure and controlling the frequency scanning angle. Meanwhile, the unilateral slotted waveguide slot can avoid the low frequency lobe in broadband operation, and is more convenient to combine with other components into a network. The structure principle is clear, and the structure is simple and easy to realize.
Claims (3)
1. A waveguide slot antenna with frequency scanning comprises a first structural member, a second structural member, a front wall surface and a rear wall surface, wherein the first structural member is opposite to the second structural member, and the front wall surface and the rear wall surface are tightly attached to two sides of the first structural member and the second structural member to form a waveguide structure; the lower surface of the first structural member is provided with a plurality of long bulges in an array along the extension direction of the lower surface, and the long bulges are vertical to the extension direction of the first structural member and are opposite; the upper surface of the second structural member is provided with a plurality of rectangular ridge structures in an array along the extending direction of the second structural member, and the rectangular ridge structures and the long bulges are arranged at intervals in the waveguide structure; the upper surface of the first structural member is provided with a plurality of waveguide radiation gaps, the waveguide radiation gaps correspond to the rectangular ridge structures one by one, and the waveguide radiation gaps are positioned right above the rectangular ridge structures; and an inner cavity between the rectangular ridge structure and the long bulge in the waveguide structure forms a snake-shaped slow wave line.
2. A frequency scanning waveguide slot antenna according to claim 1, wherein the rectangular ridge structure and the elongated protrusion are both adjacent to the front and rear walls.
3. A frequency scanning waveguide slot antenna according to claim 1, wherein one end of the serpentine slow wave line is provided with a waveguide coaxial switching port for feeding; and the other end of the serpentine waveguide is provided with an absorption load for absorbing the redundant electromagnetic energy which is not radiated out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111597041.XA CN114361803A (en) | 2021-12-24 | 2021-12-24 | Waveguide slot antenna with frequency scanning function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111597041.XA CN114361803A (en) | 2021-12-24 | 2021-12-24 | Waveguide slot antenna with frequency scanning function |
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| CN114361803A true CN114361803A (en) | 2022-04-15 |
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| CN202111597041.XA Pending CN114361803A (en) | 2021-12-24 | 2021-12-24 | Waveguide slot antenna with frequency scanning function |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3643261A (en) * | 1969-10-09 | 1972-02-15 | Itt | Apparatus and method of compensating a long highly dispersive traveling wave transmission line |
| CN107946741A (en) * | 2016-10-13 | 2018-04-20 | 德尔福技术有限公司 | The meander configuration with reduced beam squint for automotive vehicle radar system frequency scans formula antenna |
| WO2018145300A1 (en) * | 2017-02-10 | 2018-08-16 | 华为技术有限公司 | Antenna array and communication device |
| CN113346224A (en) * | 2021-05-27 | 2021-09-03 | 北京无线电测量研究所 | Radiation unit, antenna receiving assembly, frequency-phase electric scanning slot array antenna and radar |
| CN214153195U (en) * | 2020-12-06 | 2021-09-07 | 西安电子工程研究所 | Waveguide narrow-edge frequency-scanning antenna for widening frequency-scanning angle range of traveling wave array and array antenna |
-
2021
- 2021-12-24 CN CN202111597041.XA patent/CN114361803A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3643261A (en) * | 1969-10-09 | 1972-02-15 | Itt | Apparatus and method of compensating a long highly dispersive traveling wave transmission line |
| CN107946741A (en) * | 2016-10-13 | 2018-04-20 | 德尔福技术有限公司 | The meander configuration with reduced beam squint for automotive vehicle radar system frequency scans formula antenna |
| WO2018145300A1 (en) * | 2017-02-10 | 2018-08-16 | 华为技术有限公司 | Antenna array and communication device |
| CN214153195U (en) * | 2020-12-06 | 2021-09-07 | 西安电子工程研究所 | Waveguide narrow-edge frequency-scanning antenna for widening frequency-scanning angle range of traveling wave array and array antenna |
| CN113346224A (en) * | 2021-05-27 | 2021-09-03 | 北京无线电测量研究所 | Radiation unit, antenna receiving assembly, frequency-phase electric scanning slot array antenna and radar |
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