CN216529367U - Broadband millimeter wave waveguide slot antenna - Google Patents
Broadband millimeter wave waveguide slot antenna Download PDFInfo
- Publication number
- CN216529367U CN216529367U CN202220170106.6U CN202220170106U CN216529367U CN 216529367 U CN216529367 U CN 216529367U CN 202220170106 U CN202220170106 U CN 202220170106U CN 216529367 U CN216529367 U CN 216529367U
- Authority
- CN
- China
- Prior art keywords
- radiation
- unit
- feed
- radiation unit
- radiating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000005855 radiation Effects 0.000 claims abstract description 72
- 230000008878 coupling Effects 0.000 claims abstract description 22
- 238000010168 coupling process Methods 0.000 claims abstract description 22
- 238000005859 coupling reaction Methods 0.000 claims abstract description 22
- 230000005284 excitation Effects 0.000 claims abstract description 6
- 238000005388 cross polarization Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Images
Landscapes
- Waveguide Aerials (AREA)
Abstract
The utility model provides a broadband millimeter wave waveguide slot antenna which comprises a radiation unit and a feed unit, wherein the radiation unit and the feed unit are attached to each other, a coupling slot is formed in one side, attached to each other, of the radiation unit and the feed unit, and cavities of the radiation unit and the feed unit are communicated through the coupling slot. A plurality of horizontal or inclined radiation gaps which are distributed at intervals are arranged on one side of the radiation unit opposite to the side surface attached to the feed unit, so that a cavity in the radiation unit is communicated with a free space, and the radiation gap radiates or receives energy outwards to realize the function of the antenna; the feed unit is used for receiving electromagnetic energy fed from the external waveguide, feeding the energy into the radiation unit through the radiation gap and radiating the energy into free space. The utility model improves the-10 dB bandwidth of the multilayer structure feed waveguide slot antenna which accords with Chebyshev excitation distribution to about 6GHz by adjusting the multilayer feed structure and the position, so that the utility model can fully exert the advantages of simple design and easy realization.
Description
Technical Field
The utility model belongs to the field of antennas, and particularly relates to a broadband millimeter wave waveguide slot antenna.
Background
An antenna is a very important component in a communication radar system as a device that transmits or receives electromagnetic waves. With the development of the communication radar industry, the microwave frequency band is increasingly crowded, the frequency spectrum resource of higher frequency is further developed, and the application of the millimeter wave antenna is widely concerned by people.
The waveguide slot antenna has the characteristics of simple and compact structure, large power capacity, high reliability, easy control of mouth-to-face field distribution, convenient installation, high antenna aperture efficiency, and easy realization of narrow beams, low sidelobes and even ultra-low sidelobes, has small transmission loss in a millimeter wave band, and is one of ideal choices of millimeter wave antenna forms.
The feed structure of the existing waveguide slot antenna is mainly divided into two types, one type is a single-layer structure, namely, the radiation waveguide and the feed port are on the same plane, and the single-layer structure has the advantages of small occupied space and the defects of complex design and great influence of the structure on standing waves. The other is a multilayer structure, namely, a multilayer waveguide is utilized to carry out feed through slot coupling electromagnetic energy, the structure is simple in design and wide in application, but the bandwidth of the antenna in a millimeter wave band is reduced to a certain extent, and the performance requirement in practical application is not satisfied.
In the existing design of the multilayer structure center feed waveguide slot antenna excited by the antenna designed according to the Chebyshev distribution, the working bandwidth of the antenna is difficult to expand, and the-10 dB bandwidth is about 1.7GHz, as shown in figure 1, which greatly limits the application of the waveguide slot antenna adopting the multilayer structure feed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing a broadband millimeter wave waveguide slot antenna, and aims to solve the problem that the bandwidth of a millimeter wave band is reduced due to the fact that the multilayer structure of the waveguide slot antenna in the prior art is fed.
The utility model is realized in such a way that the broadband millimeter wave waveguide slot antenna comprises a radiation unit and a feed unit, wherein the radiation unit and the feed unit both comprise standard waveguide cavities, and the radiation unit and the feed unit are attached to each other; one side of the radiating element, which is mutually attached to the feed element, is a coupling side surface, and the side opposite to the coupling side surface is a radiating side surface; a coupling gap is formed in the coupling side surface, and the cavities of the radiation unit and the feed unit are communicated through the coupling gap;
the two ends of a standard waveguide cavity of the radiation unit are closed, and the radiation side surface of the radiation unit is provided with a plurality of horizontal or inclined radiation gaps which are distributed at intervals so as to enable the cavity inside the radiation unit to be communicated with a free space, and the radiation gap radiates or receives energy outwards to realize the function of an antenna;
one end of a standard waveguide cavity of the feed unit is closed, the other end of the standard waveguide cavity is communicated with the free space, and the standard waveguide cavity is used for receiving electromagnetic energy fed in from an external waveguide, feeding the energy into the radiation unit through a radiation gap connected with the radiation unit, and then radiating the energy into the free space.
In one embodiment, the radiating element is attached to a narrow side of the feed element, and an inclined slot is formed on a radiating side surface of the radiating element as the radiating slot.
In one embodiment, the radiation apertures provided by the radiation elements are designed according to the chebyshev excitation profile to achieve a lower side lobe.
In one embodiment, a choke groove is additionally arranged around the radiation slot on the radiation side surface of the radiation unit to suppress the cross polarization effect and improve the overall performance of the antenna.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model improves the-10 dB bandwidth of the multilayer structure feed waveguide slot antenna which accords with Chebyshev excitation distribution to about 6GHz by adjusting the multilayer feed structure and the position, so that the utility model can fully exert the advantages of simple design and easy realization, and can be widely applied to the application with higher requirement on the working bandwidth of the millimeter wave antenna.
The antenna and the feed structure thereof have simple forms and are easy to design and realize, but the performance of the antenna is optimized to a great extent by changing the details, thereby providing a good foundation for the application of the antenna under the broadband requirement.
Drawings
FIG. 1 is a schematic diagram of the s11 parameter of a conventional multi-layer structure center-fed waveguide slot antenna excited by a Chebyshev distribution design antenna;
fig. 2 is a schematic structural diagram of a broadband millimeter wave waveguide slot antenna according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a coupling slot position of a broadband millimeter wave waveguide slot antenna provided by an embodiment of the present invention;
fig. 4 is a schematic diagram of s11 parameter of the broadband millimeter wave waveguide slot antenna provided in the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly and encompass, for example, both fixed and removable coupling as well as integral coupling; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 2, it is shown that the broadband millimeter wave waveguide slot antenna provided in this embodiment includes a feed unit 1 and a radiation unit 2, where the radiation unit 2 and the feed unit 1 both include standard waveguide cavities, and the radiation unit 2 and the feed unit 1 are attached to each other.
The side face of the radiation unit 2, which is attached to the feed unit 1, is a coupling side face, a coupling gap 3 is formed in the coupling side face, and the cavities of the radiation unit 2 and the feed unit 1 are communicated through the coupling gap 3.
The two ends of the standard waveguide cavity of the radiation unit 2 are closed, one side of the radiation unit 2 opposite to the coupling side is a radiation side, and the radiation side is provided with a plurality of horizontal or inclined radiation gaps 4 which are distributed at intervals, so that the cavity inside the radiation unit 2 is communicated with a free space, and the radiation gap 3 radiates or receives energy outwards to realize the function of the antenna.
One end of a standard waveguide cavity of the feed unit 1 is closed, and the other end of the standard waveguide cavity is communicated with the free space and used for receiving electromagnetic energy fed in from an external waveguide, feeding the energy into the radiation unit 2 through a radiation gap 4 connected with the radiation unit 2, and then radiating the energy into the free space.
The radiation unit 2 is further provided with a choke groove 5 surrounding the radiation slot 4, and the radiation slot 4 and the choke groove 4 extend along the waveguide to be distributed in an array, and four inclined radiation slots 4 are provided. As shown in fig. 3, in the technical solution of this embodiment, electromagnetic energy is input from the open port of the feed waveguide by appropriately selecting the length of the waveguide of the feed unit 1 and the position of the radiation slot 4, and is fed into the radiation waveguide on the upper layer through the radiation slot 4. The radiation slots 4 opened at the side of the radiation unit 2 are half of the waveguide wavelength away, and the radiation slots 4 cut the current of the narrow wall of the waveguide to form the electromagnetic wave to propagate in the free space.
The radiating unit 2 is attached to the narrow side of the feed unit 1, the radiating gap 4 is designed in an inclined angle, and Chebyshev excitation distribution is adopted for amplitude weighting, so that an ideal low-side lobe effect is achieved. By adding the choke groove 5 to the radiation slot 4, cross polarization between slots can be suppressed, and the performance of the entire antenna can be improved.
The waveguide slot antenna is designed to work in a millimeter wave frequency band, the radiation unit 2 and the feed unit 1 are waveguides with WR-10 standard size, the length of the cross section of a port is 2.54mm, and the width is 1.27 mm. The total length of the radiating element 2 is 11.44mm, the total length of the feed element 1 is 2.975mm, the coupling slot 5 is 2.3mm long, 0.3mm wide, the inclination angle is 22 degrees, and the center is 10.16mm from the end of the radiating element.
As shown in fig. 4, the s11 parameter of the waveguide slot antenna of the present embodiment is less than-10 dB in the frequency band from 75.07GHz to 81.12GHz, and the operating bandwidth is about 6GHz, which is significantly improved compared with the bandwidth of the conventional waveguide slot antenna with a multilayer structure.
In the embodiment, the-10 dB bandwidth of the multilayer structure feed waveguide slot antenna which accords with Chebyshev excitation distribution is improved to about 6GHz by adjusting the multilayer feed structure and the position, so that the advantages of simple design and easy realization can be fully exerted, and the multilayer structure feed waveguide slot antenna can be widely applied to the application with higher requirement on the working bandwidth of the millimeter wave antenna.
The antenna and the feeding structure thereof of the embodiment have simple forms and are easy to design and implement, but the performance of the antenna is optimized to a great extent by changing the details, so that a good foundation is provided for the application of the antenna under the broadband requirement.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (4)
1. A broadband millimeter wave waveguide slot antenna comprises a radiation unit and a feed unit, and is characterized in that the radiation unit and the feed unit both comprise standard waveguide cavities, and the radiation unit and the feed unit are attached to each other; one side of the radiating element, which is mutually attached to the feed element, is a coupling side surface, and the side opposite to the coupling side surface is a radiating side surface; a coupling gap is formed in the coupling side surface, and the cavities of the radiation unit and the feed unit are communicated through the coupling gap;
the two ends of a standard waveguide cavity of the radiation unit are closed, and the radiation side surface of the radiation unit is provided with a plurality of horizontal or inclined radiation gaps which are distributed at intervals so as to enable the cavity inside the radiation unit to be communicated with a free space, and the radiation gap radiates or receives energy outwards to realize the function of an antenna;
one end of a standard waveguide cavity of the feed unit is closed, the other end of the standard waveguide cavity is communicated with the free space, and the standard waveguide cavity is used for receiving electromagnetic energy fed in from an external waveguide, feeding the energy into the radiation unit through a radiation gap connected with the radiation unit, and then radiating the energy into the free space.
2. The broadband millimeter wave waveguide slot antenna according to claim 1, wherein the radiating element is attached to the narrow side of the feed element, and an inclined slot is provided as the radiating slot on the radiating side of the radiating element.
3. The broadband millimeter wave waveguide slot antenna of claim 1 or 2, wherein the radiating slots formed in the radiating elements are designed according to chebyshev excitation distribution to obtain lower side lobes.
4. The broadband millimeter wave waveguide slot antenna of claim 1, wherein a choke groove is additionally arranged around the radiation slot on the radiation side surface of the radiation unit to suppress cross polarization effect and improve the overall performance of the antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220170106.6U CN216529367U (en) | 2022-01-21 | 2022-01-21 | Broadband millimeter wave waveguide slot antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220170106.6U CN216529367U (en) | 2022-01-21 | 2022-01-21 | Broadband millimeter wave waveguide slot antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216529367U true CN216529367U (en) | 2022-05-13 |
Family
ID=81519417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220170106.6U Active CN216529367U (en) | 2022-01-21 | 2022-01-21 | Broadband millimeter wave waveguide slot antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216529367U (en) |
-
2022
- 2022-01-21 CN CN202220170106.6U patent/CN216529367U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113113782B (en) | Broadband metal flat plate array antenna, radar and wireless communication system | |
| CN112952372A (en) | Millimeter wave band ultra-wideband patch antenna based on substrate integrated waveguide feed | |
| CN101170212A (en) | Common face wave guide single-point feedback rear cavity round polarization antenna | |
| CN114256626B (en) | Dual-frequency dual-circular polarization efficient common-caliber flat antenna | |
| CN103474780A (en) | Substrate integrated waveguide cavity slot antenna | |
| CN113922075A (en) | Slow wave substrate integrated waveguide duplex antenna based on high-order mode | |
| CN111987401A (en) | Ridge waveguide to microstrip line ultra wide band transition structure based on quartz probe | |
| CN106711601B (en) | Broadband millimeter wave waveguide slot antenna adopting double parabolic cylinder feed | |
| CN115275587A (en) | Novel common-caliber antenna | |
| CN114824763A (en) | Microstrip line fed ionic liquid antenna | |
| CN114256614A (en) | Ultra-wideband planar antenna array applied to millimeter wave communication system | |
| CN114335999A (en) | K/Ka waveband dual-band dual-circularly-polarized antenna based on gap waveguide | |
| CN110459861B (en) | Double-frequency elliptical slot antenna based on substrate integrated waveguide design | |
| CN216529367U (en) | Broadband millimeter wave waveguide slot antenna | |
| CN107579346B (en) | A kind of microstrip antenna of the low radar cross section of ultra wide band | |
| Hautcoeur et al. | Low-cost printed antenna array built with hybrid feed for urban microwave links | |
| CN216436146U (en) | Waveguide slot antenna structure and array antenna suitable for Ka wave band | |
| CN202444055U (en) | Microstrip array antenna | |
| CN112531355B (en) | +/-45-degree dual-polarized millimeter wave array antenna | |
| CN111509392B (en) | High scanning rate antenna of wave beam based on microstrip line structure | |
| CN108321528B (en) | Groove antenna array with simplified feed structure | |
| CN209948058U (en) | Large-spacing low-grating-lobe electric large microstrip array antenna based on high-order odd-order mode resonance | |
| Sahu et al. | A slot anntenna designed in ridge gap waveguide technology for V-band applications | |
| Lou et al. | A flat dual-polarized continuous transverse stub antenna array based on substrate integrated waveguide | |
| CN110112580A (en) | A kind of circular waveguide double frequency common reflector based on structure multiplexing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A broadband millimeter wave waveguide slot antenna Granted publication date: 20220513 Pledgee: Bank of Communications Limited Shenzhen Branch Pledgor: SHENZHEN ANNGIC TECHNOLOGY CO.,LTD. Registration number: Y2024980002919 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |