CN111509382A - Shaped antenna cover and radar device - Google Patents

Shaped antenna cover and radar device Download PDF

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Publication number
CN111509382A
CN111509382A CN202010438182.6A CN202010438182A CN111509382A CN 111509382 A CN111509382 A CN 111509382A CN 202010438182 A CN202010438182 A CN 202010438182A CN 111509382 A CN111509382 A CN 111509382A
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China
Prior art keywords
shaped
antenna
radome
antenna housing
dielectric constant
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CN202010438182.6A
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Chinese (zh)
Inventor
夏寒
王绍龙
谢倩倩
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Nanjing Hawkeye Electronic Technology Co Ltd
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Nanjing Hawkeye Electronic Technology Co Ltd
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Priority to CN202010438182.6A priority Critical patent/CN111509382A/en
Publication of CN111509382A publication Critical patent/CN111509382A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
    • H01Q1/421—Means for correcting aberrations introduced by a radome
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/027—Constructional details of housings, e.g. form, type, material or ruggedness
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Details Of Aerials (AREA)

Abstract

The application provides a shaped antenna housing and a radar device, wherein the shaped antenna housing comprises a dielectric layer; the shaping layer is arranged below the dielectric layer and used for shaping a plurality of antennas, and the antennas are arranged below the shaped antenna housing; the shaping layer is provided with a plurality of strip-shaped mediums which are arranged non-uniformly, and the strip-shaped mediums are used for changing the dielectric constant of the shaped antenna housing so that the dielectric constant of the shaped antenna housing tends to 1. The forming antenna housing can reduce the refraction influence of the forming antenna housing on radar electromagnetic waves, and the situation that the directional diagram gain of the wide beam antenna is greatly reduced along with the increase of the angle is avoided, so that the effect that the radiation directional diagram of the wide beam antenna is close to a non-antenna housing is achieved.

Description

Shaped antenna cover and radar device
Technical Field
The application relates to the technical field of millimeter wave antennas, in particular to a forming antenna housing and a radar device.
Background
With the development of large-scale integrated circuit technology, the currently adopted vehicle-mounted millimeter wave collision avoidance radar system is highly integrated, and the automotive millimeter wave radar only comprises an antenna and a plurality of radio frequency transceiving and signal processing monolithic integrated circuit (MMIC) chips. Therefore, the antenna becomes one of the key design parts for the effective work of the millimeter wave radar of the automobile, and meanwhile, the antenna also becomes the key for judging whether the millimeter wave radar for the automobile can gain the market.
At present, the mainstream 77GHz frequency band millimeter wave radar is mainly divided into a long-range radar (L RR), a medium-range radar (MRR) and a short-range radar (SRR) according to different application scene requirements, and the antenna housing is taken as one of important structural components of the radar, so that the antenna component can be protected from being influenced by external factors on the premise of not influencing the radiation performance of an antenna.
For medium-range and short-range radars, the wide-angle detection capability is strong, so that the designed antenna component belongs to a wide-beam antenna. However, if the wide-beam antenna uses a common radome, the directional pattern gain of the wide-beam antenna rapidly decreases with the increase of the angle, and the large-angle detection capability of the radar is seriously affected. This is because the dielectric constant of the existing radome material is high, and when the electromagnetic wave passes through the radome, a large refraction is generated, thereby affecting the original radiation direction of the antenna. Therefore, aiming at medium-range and short-range radars, a non-uniformly arranged forming antenna housing suitable for a wide beam antenna is designed, the dielectric constant of the antenna housing is reduced, the influence of the antenna housing on the refraction of electromagnetic waves is reduced, and the beam width is as close as possible to the condition without the antenna housing.
Therefore, the present application provides a shaped radome to solve the above problems.
Disclosure of Invention
The embodiment of the application provides a shaped antenna housing, which solves the problem that when a wide-beam antenna uses the antenna housing, the large-angle detection capability of a radar is seriously influenced.
According to a first aspect of the present application, an embodiment of the present application provides an shaped radome, including: a dielectric layer; the shaping layer is arranged below the dielectric layer and used for shaping a plurality of antennas, and the antennas are arranged below the shaped antenna housing; the shaping layer is provided with a plurality of strip-shaped mediums which are arranged non-uniformly, and the strip-shaped mediums are used for changing the dielectric constant of the shaped antenna housing so that the dielectric constant of the shaped antenna housing tends to 1.
Furthermore, the strip-shaped medium and the antenna are arranged in a staggered mode in the vertical direction.
Further, the antenna is a wide beam antenna.
Furthermore, a window is arranged at the position of the shape-imparting layer corresponding to each antenna.
Further, the width of the window is greater than a quarter wavelength.
Further, the dielectric constant of the shaped radome is as follows:
Figure BDA0002503083840000021
whereinsIs the dielectric constant of the shaped radome,0is the dielectric constant of air and is,radomeis the dielectric constant, g, of the dielectric layer1Is the width of the strip-shaped medium, and g is the interval of the strip-shaped medium.
Further, the material of the dielectric layer comprises polybutylene terephthalate.
Further, the dielectric constant of the polybutylene terephthalate is 3.1.
Further, the depth of the strip-shaped medium is less than or equal to one quarter of the working wavelength.
According to a second aspect of the present application, there is provided a radar apparatus comprising any one of the shaped radomes described above.
The embodiment of the application provides a forming antenna housing and radar device changes the dielectric constant of forming antenna housing through the strip medium to make the dielectric constant trend of forming antenna housing 1, and then reduce the influence of forming antenna housing to radar electromagnetic wave's refraction, avoid the condition emergence that the directional diagram gain of wide wave beam antenna descends by a wide margin along with the angle increase, thereby reach the effect that the radiation pattern of wide wave beam antenna is close to no antenna housing.
Drawings
The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a top view of an shaped radome provided in an embodiment of the present application.
Fig. 2 is a side view of the shaped radome provided in the embodiment of the present application.
Fig. 3 is an enlarged view of a portion a of fig. 2.
Fig. 4 is a diagram comparing the gain of the wide beam antenna pattern provided in the embodiment of the present application.
Fig. 5 provides a radar apparatus according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. 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 application.
The terms "first," "second," "third," and the like in the description and in the claims of the present application and in the above-described drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the objects so described are interchangeable under appropriate circumstances. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
In particular embodiments, the drawings discussed below and the various embodiments used to describe the principles of the present disclosure are by way of illustration only and should not be construed to limit the scope of the present disclosure. Those skilled in the art will understand that the principles of the present application may be implemented in any suitably arranged system. Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. Further, a mobile terminal according to an exemplary embodiment will be described in detail with reference to the accompanying drawings. Like reference symbols in the various drawings indicate like elements.
The terminology used in the detailed description is for the purpose of describing particular embodiments only and is not intended to be limiting of the concepts of the present application. Unless the context clearly dictates otherwise, expressions used in the singular form encompass expressions in the plural form. In the present specification, it will be understood that terms such as "including," "having," and "containing" are intended to specify the presence of the features, integers, steps, acts, or combinations thereof disclosed in the specification, and are not intended to preclude the presence or addition of one or more other features, integers, steps, acts, or combinations thereof. Like reference symbols in the various drawings indicate like elements.
In the description of the present application, it is to 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 meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
Specifically, referring to fig. 1 and fig. 2, an shaped radome according to an embodiment of the present application includes a dielectric layer 10, a shaped layer 20, a strip-shaped dielectric 21, a wide opening 22, and an antenna 30.
The material of the dielectric layer 10 includes Polybutylene terephthalate (PBT), which has a dielectric constant of 3.1, and has advantages of low cost, excellent dielectric constant and loss properties, and strong processability. In other embodiments, the material of the dielectric layer 10 may also be Polyetherimide (PEI) (with a dielectric constant of 3.15), Polyphenylene sulfide (PPS) (with a dielectric constant of 3), but has a certain difference from PBT in terms of processability and electrical properties, for example, PPS is not suitable for laser welding, and PEI loss is large. A window 22 is provided at a position of the dielectric layer 10 corresponding to each of the antennas 30. The width of the window 22 is greater than a quarter wavelength to ensure a wide beam antenna broadening, wherein the width of the window 22 may be different for each antenna 30.
The shaping layer 20 is disposed below the dielectric layer 10. The shaping layer 20 is used for shaping a plurality of antennas 30, wherein the antennas 30 are arranged below the shaped radome. The antenna 30 is a wide beam antenna, and the antenna 30 forms a pattern of a specific shape by reflection of the shaping layer 20. The shape-imparting layer 20 is provided with a plurality of strip-shaped mediums 21 which are arranged non-uniformly, wherein the strip-shaped mediums 21 are used for changing the dielectric constant of the shape-imparting radome, so that the dielectric constant of the shape-imparting radome tends to 1.
The strip-shaped medium 21 and the antenna 30 are arranged in a staggered manner, for example, in the vertical direction, the strip-shaped medium 21 and the antenna 30 are not overlapped, so as to avoid affecting the performance of the antenna.
The dielectric constant of the shaped antenna housing is as follows:
Figure BDA0002503083840000041
whereinsIs the dielectric constant of the shaped radome,0is the dielectric constant of air and is,radomeis the dielectric constant, g, of the dielectric layer 101Is the width of the strip-shaped medium, and g is the interval of the strip-shaped medium. The dielectric constant of air is 1.
From the above formula, with g1The increase of/g increases the beam width of the antenna 30 after passing through the shaped antenna housing, and the loss of the shaped antenna housing also increasesAnd (4) increasing. To ensure beam broadening, see FIG. 3, the depth g of the strip medium2Less than or equal to one quarter of the operating wavelength, but can be increased appropriately according to the arrangement form (such as linear array or planar array) and the spacing of the antennas in the radar. Selecting various parameters of the shaped antenna housing, and considering the aspects of comprehensive loss, required beam width, processing feasibility and the like for design selection so as to ensure the dielectric constant of the shaped antenna housingsAs close to 1 as possible. For example, if the antenna gain is less affected by the radome within ± 60 ° of the beam width, g1The value of/g can be 0.5, and the value of g is more than one quarter of the working wavelength.
Referring to fig. 4, a diagram comparing the directional diagram gain of the wide beam antenna provided by the embodiment of the present application. By using the shaped antenna housing provided by the application, the wide-angle gain of the wide-beam antenna is not reduced.
Referring to fig. 5, an embodiment of the present application provides a radar apparatus, where the radar apparatus 500 includes the shaped radome 100 described above.
The embodiment of the application provides a forming antenna housing and radar device, it changes the dielectric constant of forming antenna housing through strip medium to make the dielectric constant of forming antenna housing tend to 1, and then reduce the influence of forming antenna housing to radar electromagnetic wave's refraction, avoid the wide wave beam antenna's directional diagram gain to take place along with the condition that the angle increases and descend by a wide margin, thereby reach the effect that the radiation pattern of wide wave beam antenna is close to no antenna housing.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The forming antenna cover provided by the embodiment of the present application is introduced in detail, and a specific example is applied in the description to explain the principle and the implementation of the present application, and the description of the embodiment is only used to help understanding the technical scheme and the core idea of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.

Claims (10)

1. An shaped radome, comprising:
a dielectric layer; and
the shaping layer is arranged below the dielectric layer and used for shaping a plurality of antennas, and the antennas are arranged below the shaped antenna housing;
the shaping layer is provided with a plurality of strip-shaped mediums which are arranged non-uniformly, and the strip-shaped mediums are used for changing the dielectric constant of the shaped antenna housing so that the dielectric constant of the shaped antenna housing tends to 1.
2. The shaped radome of claim 1, wherein the strip-shaped mediums and the antenna are vertically staggered from each other.
3. The shaped radome of claim 2, wherein the antenna is a wide beam antenna.
4. The shaped radome of claim 1, wherein a window is provided at a position of the shaped layer corresponding to each antenna.
5. The shaped radome of claim 4, wherein the width of the window is greater than a quarter wavelength.
6. The shaped radome of claim 1, wherein the dielectric constant of the shaped radome is:
Figure FDA0002503083830000011
whereinsIs the dielectric constant of the shaped radome,0is the dielectric constant of air and is,radomeis the dielectric constant of the dielectric layer，g1Is the width of the strip-shaped medium, and g is the interval of the strip-shaped medium.
7. The shaped radome of claim 1, wherein the material of the dielectric layer comprises polybutylene terephthalate.
8. The shaped radome of claim 7, wherein the polybutylene terephthalate has a dielectric constant of 3.1.
9. The shaped radome of claim 1, wherein the depth of the strip-shaped medium is less than or equal to one quarter of the operating wavelength.
10. A radar apparatus comprising the shaped radome of any one of claims 1-9.
CN202010438182.6A 2020-05-21 2020-05-21 Shaped antenna cover and radar device Pending CN111509382A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010438182.6A CN111509382A (en) 2020-05-21 2020-05-21 Shaped antenna cover and radar device

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Application Number Priority Date Filing Date Title
CN202010438182.6A CN111509382A (en) 2020-05-21 2020-05-21 Shaped antenna cover and radar device

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6307509B1 (en) * 1999-05-17 2001-10-23 Trimble Navigation Limited Patch antenna with custom dielectric
CN1365162A (en) * 2000-12-20 2002-08-21 古河电气工业株式会社 Sheet antenna and its producing method
CN110011075A (en) * 2019-05-17 2019-07-12 江苏集萃移动通信技术研究所有限公司 A kind of high-performance beam-shaped antenna and beam form-endowing method
CN110336129A (en) * 2019-07-15 2019-10-15 上海矽杰微电子有限公司 A kind of antenna house of millimetre-wave radar

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6307509B1 (en) * 1999-05-17 2001-10-23 Trimble Navigation Limited Patch antenna with custom dielectric
CN1365162A (en) * 2000-12-20 2002-08-21 古河电气工业株式会社 Sheet antenna and its producing method
CN110011075A (en) * 2019-05-17 2019-07-12 江苏集萃移动通信技术研究所有限公司 A kind of high-performance beam-shaped antenna and beam form-endowing method
CN110336129A (en) * 2019-07-15 2019-10-15 上海矽杰微电子有限公司 A kind of antenna house of millimetre-wave radar

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Application publication date: 20200807

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