CN113571866A - Antenna, vehicle-mounted millimeter wave radar and automobile - Google Patents
Antenna, vehicle-mounted millimeter wave radar and automobile Download PDFInfo
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- CN113571866A CN113571866A CN202110874395.8A CN202110874395A CN113571866A CN 113571866 A CN113571866 A CN 113571866A CN 202110874395 A CN202110874395 A CN 202110874395A CN 113571866 A CN113571866 A CN 113571866A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/32—Adaptation for use in or on road or rail vehicles
- H01Q1/3208—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used
- H01Q1/3233—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used particular used as part of a sensor or in a security system, e.g. for automotive radar, navigation systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/02—Waveguide horns
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- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
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Abstract
The invention relates to the field of antennas, and discloses an antenna, a vehicle-mounted millimeter wave radar and an automobile, wherein the antenna comprises: the feed substrate and the radiation substrate are vertically arranged, and are clamped through a plurality of clamping structures; the surface of one side of the radiation substrate, which faces the feed substrate, is a ground plane, and a coupling window is arranged on the ground plane; a radiation unit is arranged on the surface of one side of the radiation substrate, which is far away from the feed substrate; the feed substrate forms a substrate integrated waveguide structure and feeds millimeter waves to the radiation substrate through the coupling window. The antenna includes a feed substrate and a radiation substrate disposed perpendicular to each other. The feed substrate is formed as a substrate-integrated waveguide structure, and a high-frequency signal (typically, millimeter wave, such as 76-81GHz) is fed to the radiation substrate through the coupling window. The feed substrate and the radiation substrate are clamped through a plurality of clamping structures, the defects in the prior art are overcome, the feed substrate and the radiation substrate are convenient to install and not easy to fall off, and the performance of the antenna cannot be affected by the material of all plastics.
Description
Technical Field
The invention relates to the technical field of antennas, in particular to an antenna, a vehicle-mounted millimeter wave radar and an automobile.
Background
The feed substrate and the radiation substrate in the prior art can cause the aging and falling of the adhesive due to high temperature and illumination in the outdoor use environment through an adhesion mode, and the performance of the antenna is influenced. And the metal material of the screw can affect the performance of the antenna even though the screw is tightly fixed by the screw. And the two fixing modes have high alignment requirements, and the performance of the antenna is easily influenced by installation errors.
Disclosure of Invention
The invention discloses an antenna, a vehicle-mounted millimeter wave radar and an automobile, which are convenient to install and are not easy to fall off.
In order to achieve the purpose, the invention provides the following technical scheme:
in a first aspect, the present invention provides an antenna comprising: the feed substrate and the radiation substrate are vertically arranged, and the feed substrate and the radiation substrate are clamped through a plurality of clamping structures;
the surface of one side of the radiation substrate, which faces the feed substrate, is a ground plane, and a coupling window is arranged on the ground plane; a radiation unit is arranged on the surface of one side, away from the feed substrate, of the radiation substrate;
the feed substrate forms a substrate integrated waveguide structure and feeds millimeter waves to the radiation substrate through the coupling window.
The antenna includes a feed substrate and a radiation substrate disposed perpendicular to each other. The feed substrate is formed as a Substrate Integrated Waveguide (SIW) and a high frequency signal (typically a millimeter wave, such as 76-81GHz) is fed to the radiating substrate through the coupling window. The feed substrate and the radiation substrate are clamped through a plurality of clamping structures, the defects in the prior art are overcome, the feed substrate and the radiation substrate are convenient to install and not easy to fall off, and the performance of the antenna cannot be affected by the material of all plastics.
Optionally, the clamping structure includes a protrusion component and a slot component matched with the protrusion component.
Optionally, the protrusion assembly is disposed on the feeding substrate, and the slot assembly is disposed on the radiating substrate.
Optionally, the protrusion assembly includes a first protrusion and a second protrusion arranged along a normal direction of the feeding substrate; the socket assembly includes a first socket mated with the first protrusion and a second socket mated with the second protrusion.
Optionally, a locking structure is disposed between the second protrusion and the second slot.
Optionally, the locking structure includes a first locking step and a second locking step matched with the first locking step, the first locking step is disposed on one side of the second protrusion departing from the first protrusion, and the second locking step is disposed on one side of the second slot departing from the first slot.
Optionally, the radiation substrate is provided with a first limiting portion at the first slot, and the first limiting portion extends along a normal direction of the feed substrate and toward the second slot; the first protrusion is provided with a first limiting groove matched with the first limiting part;
and/or the tail end of the second protrusion is also provided with a second limiting part, and the second limiting part extends towards one side of the first protrusion; and a second limiting groove matched with the second limiting part is formed in one side, facing the first slot, of the second slot.
Optionally, a third slot is formed between the first protrusion and the second protrusion, and a third protrusion matched with the third slot is formed between the first slot and the second slot.
Optionally, the number of the radiation substrates is multiple, and the multiple radiation substrates are stacked in a direction perpendicular to the radiation substrates.
In a second aspect, the present invention also provides a vehicle-mounted millimeter wave radar including the antenna according to any one of the first aspect.
In a third aspect, the present invention also provides an automobile including the in-vehicle millimeter wave radar as set forth in the second aspect.
Drawings
Fig. 1 is a first three-dimensional perspective view of an antenna according to an embodiment of the present invention;
fig. 2 is a three-dimensional perspective view of an antenna according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a feeding substrate according to an embodiment of the present invention;
fig. 4 is a cross-sectional view of a feeding substrate according to an embodiment of the present invention;
fig. 5 is a cross-sectional view of a radiation substrate according to an embodiment of the present invention;
fig. 6 is a schematic view illustrating a mounting process of a feeding substrate and a radiating substrate according to an embodiment of the present invention;
fig. 7 is a schematic view of a matching structure of a feeding substrate and a radiating substrate according to an embodiment of the present invention;
fig. 8 is a back view of a radiation substrate according to an embodiment of the present invention;
fig. 9 is a back view of another radiation substrate provided by an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a feeding substrate according to an embodiment of the present invention;
fig. 11 is a schematic diagram illustrating frequency band characteristics of an antenna apparatus according to an embodiment of the present invention;
fig. 12 is a schematic structural diagram of another antenna device according to an embodiment of the present invention.
Icon: 100-a feeding substrate; 110-conductive vias; 120-a feed line; 121-matching segment; 122-fixed line width segment; 130-slotting; 200-a radiation substrate; 210-a ground plane; 220-a coupling window; 230-a radiating element; 300-a clamping structure; 310-a projection assembly; 311-a first protrusion; 312 — a second protrusion; 313-a third slot; 320-a socket component; 321-a first slot; 322-a second slot; 323-third protrusion; 330-a locking structure; 331-a first locking step; 332-a second locking step; 340-a first limit structure; 341-first limiting part; 342-a first restraint slot; 350-a second limit structure; 351-a second limit portion; 352-second limit groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention.
In a first aspect, as shown in fig. 1 to 7, an embodiment of the present invention provides an antenna, including: the feed substrate 100 and the radiation substrate 200 are vertically arranged, and the feed substrate 100 and the radiation substrate 200 are clamped through a plurality of clamping structures 300; the surface of the radiating substrate 200 facing the feeding substrate 100 is a ground plane 210, and the ground plane 210 is provided with a coupling window 220; the surface of the radiation substrate 200 on the side away from the feed substrate 100 is provided with a radiation unit 230; the feed substrate 100 forms a substrate-integrated waveguide structure and feeds millimeter waves to the radiation substrate 200 through the coupling window 220.
The antenna includes a feeding substrate 100 and a radiating substrate 200 disposed perpendicular to each other. The feeding substrate 100 is formed as a Substrate Integrated Waveguide (SIW) structure, and a high frequency signal (typically, a millimeter wave, such as 76 to 81GHz) is fed to the radiation substrate 200 through the coupling window 220. The feed substrate 100 and the radiation substrate 200 are clamped by the plurality of clamping structures 300, so that the defects in the prior art are overcome, the feed substrate is convenient to mount and not easy to fall off, and the performance of the antenna cannot be affected by the material of all plastics.
In some embodiments, the radiating element 230 is a conductive patch, such as a rectangular copper sheet or a circular copper sheet.
The material constituting radiation substrate 200 and power feeding substrate 100 is a substrate having a low loss tangent, and the loss tangent is less than 0.01.
Optionally, the clamping structure 300 includes a protrusion member 310 and a socket member 320 engaged with the protrusion member 310.
In some embodiments, the feeding substrate 100 and the radiating substrate 200 are fixed by the mutual engagement of the protrusion component 310 and the slot component 320. Specifically, the protrusion element 310 may be disposed on the feeding substrate 100, and the slot element 320 may be disposed on the radiating substrate 200; alternatively, the protrusion member 310 may be disposed on the radiating substrate 200, and the socket member 320 may be disposed on the feeding substrate 100.
In some embodiments, the protrusion element 310 is disposed on the feeding substrate 100, and the slot element 320 is disposed on the radiating substrate 200.
Referring to fig. 3 in combination with fig. 4 and 5, at least two protrusion assemblies 310 are symmetrically disposed on both sides of the feeding substrate 100, based on the principle that two points are in a line. The radiation substrate 200 is provided with a slot. The tab member 310 and the slot are mated by a snap fit.
Alternatively, the protrusion member 310 includes a first protrusion 311 and a second protrusion 312 arranged in the normal direction of the feed substrate 100; the socket assembly 320 includes a first socket 321 engaged with the first protrusion 311 and a second socket 322 engaged with the second protrusion 312.
Referring to fig. 4 and 5, the first protrusion 311 and the second protrusion 312 are located on the side of the feeding substrate 100 facing the radiation substrate 200, the first protrusion 311 and the second protrusion 312 are arranged up and down, and the first slot 321 engaged with the first protrusion 311 and the second slot 322 engaged with the second protrusion 312 are arranged up and down. The first protrusion 311 is engaged with the first slot 321, and the second protrusion 312 is engaged with the second slot 322, so that the feeding substrate 100 is connected with the radiating substrate 200.
Optionally, a locking structure 330 is disposed between the second protrusion 312 and the second slot 322.
In some embodiments, the first protrusion 311 of the feeding substrate 100 is inserted into the first slot 321, and then the feeding substrate 100 is rotated around the first protrusion 311, so as to facilitate the insertion of the second protrusion 312 into the second slot 322, and the locking structure 330 locks the second protrusion 312 and the second slot 322, so as to prevent the second protrusion 312 from being released from the second slot 322.
Optionally, the locking structure 330 includes a first locking step 331 and a second locking step 332 cooperating with the first locking step 331, the first locking step 331 is disposed on a side of the second protrusion 312 facing away from the first protrusion 311, and the second locking step 332 is disposed on a side of the second slot 322 facing away from the first slot 321.
In some embodiments, referring to fig. 4 and 5 in combination with fig. 6 and 7, the locking structure 330 is two first locking steps 331 and second locking steps 332 arranged in parallel, and the locking of the second protrusion 312 and the second slot 322 is achieved by the first locking steps 331 and the second locking steps 332 approaching to each other.
Optionally, the radiation substrate 200 is provided with a first position-limiting portion 341 at the first slot 321, and the first position-limiting portion 341 extends along the normal direction of the feed substrate 100 and toward the second slot 322; the first protrusion 311 is provided with a first limit groove 342 matched with the first limit part 341;
and/or the end of the second protrusion 312 is further provided with a second limiting portion 351, and the second limiting portion 351 extends towards one side of the first protrusion 311; a second limiting groove 352 is disposed on one side of the second slot 322 facing the first slot 321 and engaged with the second limiting portion 351.
In some embodiments, referring to fig. 7, a first limiting structure 340 and a second limiting structure 350 are further disposed between the radiating substrate 200 and the feeding substrate 100, specifically, the first limiting structure 340 includes a first limiting portion 341 and a first limiting groove 342, the first limiting portion 341 is disposed at the first slot 321 of the radiating substrate 200, and the first limiting portion 341 extends along the normal direction of the feeding substrate 100 and toward the second slot 322; the first position-limiting groove 342 is disposed in the first protrusion 311, and a first guiding surface is disposed between the first position-limiting groove 342 and the first position-limiting portion 341, so that the first protrusion 311 is inserted into the first slot 321. The second position-limiting structure 350 includes a second position-limiting portion 351 and a second position-limiting groove 352, a tip end of the second position-limiting portion 351 is formed, and the second position-limiting groove 352 is an inverted V-shaped groove to match with the tip end of the second position-limiting portion 351.
Optionally, a third slot 313 is formed between the first protrusion 311 and the second protrusion 312, and a third protrusion 323 matched with the third slot 313 is formed between the first slot 321 and the second slot 322.
In some embodiments, with continued reference to fig. 7, a third slot 313 is formed between the first protrusion 311 and the second protrusion 312, and a third protrusion 323 matched with the third slot 313 is formed between the first slot 321 and the second slot 322, and when the first protrusion 311 is inserted into the first slot 321 and the power feeding substrate 100 rotates around the first protrusion 311, the third protrusion 323 is inserted into the third slot 313 until the second protrusion 312 is snapped into the second slot 322.
The first protrusion 311 of the feeding substrate 100 is first inserted into the first slot 321, so that the feeding substrate 100 can be rotated, thereby facilitating the locking of the second protrusion 312 inserted into the second slot 322. The locking is achieved by means of the locking structures 330 at the ends, i.e. the steps that are close to each other. The second projection 312 enters against the inner wall of the second slot 322 when inserted into the second slot 322. The end of the second protrusion 312 extends upward, thereby preventing the feeding substrate 100 from being detached from the radiation substrate 200. The two steps of the locking structure 330 are snapped together against material stress, thereby preventing the feeding substrate 100 from being released.
In some embodiments, referring to fig. 8, the coupling window 220 is rectangular in shape.
In some embodiments, the shape of the coupling window 220 has a gradual profile with a middle width that is less than the width of the two ends. The intermediate width of the coupling window 220 may be one-quarter to three-quarters of the longitudinal width of the coupling window 220.
Alternatively, when the shape of the coupling window 220 has a tapered profile having a middle width smaller than both end widths, the tapered profile is linear.
When the shape of the coupling window 220 has a gradation profile having a middle width smaller than both end widths, referring to fig. 9, the gradation profile is an arc shape forming a sine curve or a hyperbola.
In some embodiments, the coupling window 220 is a centrosymmetric pattern.
The SIW couples high frequency electromagnetic signals through the coupling window 220 to the radiating element 230. Since the width of the coupling window 220 in the embodiment of the present invention is a gradual change, it has a broadband characteristic.
Optionally, the feed substrate 100 includes an upper metal surface, a dielectric substrate, and a lower metal surface, which are sequentially stacked, the feed substrate 100 is provided with at least two rows of conductive through holes to form a substrate integrated waveguide structure, the feed substrate 100 further provides a slot 130 on the upper metal surface or the lower metal surface to form a feed line 120, the feed line 120 includes a matching section 121 and a fixed line width section 122 connected to the substrate integrated waveguide structure through the matching section 121, and a width of the matching section 121 gradually decreases along a feed direction;
wherein:
the diameter d of the conductive through hole 110, the distance s between adjacent conductive through holes 110 and the distance a between two adjacent rows of conductive through hole groups satisfy the following relationship:
s/d <3 and d <0.2 a.
In some embodiments, the upper and lower surfaces of the feeding substrate 100 are each coated with copper, and the upper and lower surfaces are connected by the conductive via 110. Referring to fig. 10, in order to prevent electromagnetic leakage, SIW transmission line conductive vias 110, such as the metallized ground via diameter d and the adjacent via spacing s, are designed according to the following principles: s/d <3 and d <0.2a, where a is the width of the SIW. The matching section 121 is formed by grooving one metal surface of the SIW, and the dielectric substrate is exposed at the bottom of the groove.
In some embodiments, the length L of the matching segment 121tFrom 0.1 to 10mm, for example 0.1mm, 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm or 10 mm;
width W of matching section 121tFrom 0.5 to 5mm, for example 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm or 5 mm;
width W of fixed linewidth segment 122fIs 0.1-5mm, such as 0.1mm, 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, or 5 mm.
In some embodiments, referring to fig. 10, the slots 130 are symmetrically disposed on both sides of the matching section 121; the partial width W of the slot 130 corresponding to the fixed line width section 122nIs 0.1-3mm, e.g. 0.1mm0.5mm, 1mm, 1.5mm, 2mm, 2.5mm or 3 mm; the portion of the slot 130 corresponding to the mating segment 121 is a triangular opening.
Experimental data as shown in fig. 11, the antenna apparatus described above improves the problem of narrow bandwidth of the SIW antenna in the prior art, and reduces the insertion loss.
Alternatively, the radiation substrate 200 is plural, and the plural radiation substrates 200 are stacked in a direction perpendicular to the radiation substrate 200.
In some embodiments, more than one radiating element 230 may be provided, for example, two layers may be stacked in a direction perpendicular to the surface of the radiating substrate 200 in fig. 12, for realizing a broadband or dual frequency. The radiating elements 230 may be the same size or different (larger and smaller) between the layers.
In a second aspect, based on the same inventive concept, an embodiment of the present invention further provides an on-vehicle millimeter wave radar, including any one of the antennas in the first aspect.
In a third aspect, based on the same inventive concept, an embodiment of the present invention further provides an automobile, including any one of the vehicle-mounted millimeter wave radars in the embodiments of the second aspect.
With the development of science and technology, high and new technologies such as unmanned Driving and smart vehicles are gradually developed, and the importance of an Advanced Driving Assistance System (ADAS) as a premise for realizing unmanned Driving is self-evident. The ADAS detects the surrounding environment of the vehicle body by using various sensors mounted on the vehicle, and performs detection, identification and tracking of static and dynamic objects, so that a driver or an unmanned vehicle can detect possible dangers in the shortest time, thereby realizing obstacle avoidance of the vehicle and improving driving safety. Currently, the ADAS sensor solution widely used is to use a combination of cameras, lidar, millimeter wave radar (or ultrasonic radar). Compared with the ultrasonic radar, the millimeter wave radar has the characteristics of small volume, light weight and high spatial resolution. Compared with optical sensors such as infrared sensors, laser sensors, cameras and the like, the millimeter wave radar has strong capability of penetrating fog, smoke and dust and has the characteristics of all weather and all day. The millimeter wave radar is a radar that operates in a millimeter wave band (millimeter wave) for detection. Generally, millimeter waves refer to electromagnetic waves in the frequency domain of 30-300GHz (with a wavelength of 1-10 mm). In addition, the anti-interference and anti-stealth capabilities of the millimeter wave seeker are also superior to those of other microwave seekers. The millimeter wave radar can distinguish and identify very small targets and can identify a plurality of targets simultaneously; the imaging device has the advantages of imaging capability, small volume, good maneuverability and good concealment. In addition, the anti-interference capability of the millimeter wave radar is superior to that of other vehicle-mounted sensors.
It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. An antenna, comprising: the feed substrate and the radiation substrate are vertically arranged, and the feed substrate and the radiation substrate are clamped through a plurality of clamping structures;
the surface of one side of the radiation substrate, which faces the feed substrate, is a ground plane, and a coupling window is arranged on the ground plane; a radiation unit is arranged on the surface of one side, away from the feed substrate, of the radiation substrate;
the feed substrate forms a substrate integrated waveguide structure and feeds millimeter waves to the radiation substrate through the coupling window.
2. The antenna of claim 1, wherein the clamping structure comprises a protrusion component and a slot component matched with the protrusion component.
3. The antenna of claim 2, wherein the protrusion is disposed on the feeding substrate and the slot is disposed on the radiating substrate.
4. The antenna of claim 3, wherein the protrusion member includes a first protrusion and a second protrusion arranged in a normal direction of the feed substrate; the socket assembly includes a first socket mated with the first protrusion and a second socket mated with the second protrusion.
5. The antenna of claim 4, wherein a locking structure is disposed between the second protrusion and the second slot.
6. The antenna of claim 5, wherein the locking structure comprises a first locking step and a second locking step engaged with the first locking step, the first locking step is disposed on a side of the second protrusion facing away from the first protrusion, and the second locking step is disposed on a side of the second slot facing away from the first slot.
7. The antenna of claim 4, wherein the radiating substrate is provided with a first position-limiting portion at the first slot, and the first position-limiting portion extends along a normal direction of the feeding substrate and toward the second slot; the first protrusion is provided with a first limiting groove matched with the first limiting part; and/or the presence of a gas in the gas,
the tail end of the second protrusion is also provided with a second limiting part, and the second limiting part extends towards one side of the first protrusion; a second limiting groove matched with the second limiting part is formed in one side, facing the first slot, of the second slot; alternatively, the first and second electrodes may be,
and a third slot is formed between the first protrusion and the second protrusion, and a third protrusion matched with the third slot is formed between the first slot and the second slot.
8. The antenna according to claim 1, wherein the radiating substrate is plural, and the plural radiating substrates are stacked in a direction perpendicular to the radiating substrate.
9. An on-vehicle millimeter wave radar comprising the antenna of any of claims 1-8.
10. An automobile characterized by comprising the in-vehicle millimeter wave radar according to claim 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110874395.8A CN113571866A (en) | 2021-07-30 | 2021-07-30 | Antenna, vehicle-mounted millimeter wave radar and automobile |
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| CN202110874395.8A CN113571866A (en) | 2021-07-30 | 2021-07-30 | Antenna, vehicle-mounted millimeter wave radar and automobile |
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| CN205882161U (en) * | 2016-08-12 | 2017-01-11 | 上海圣丹纳电子科技股份有限公司 | Detachable watchband antenna structure suitable for wrist -watch cell -phone |
| CN206637355U (en) * | 2017-02-25 | 2017-11-14 | 广州市轩士佳电子科技有限公司 | A kind of LED backlight light bar fixing device |
| CN206558682U (en) * | 2017-03-29 | 2017-10-13 | 深圳市科卫泰实业发展有限公司 | A kind of tablet antenna |
| US20200212597A1 (en) * | 2018-12-28 | 2020-07-02 | AAC Technologies Pte. Ltd. | Antenna, antenna array and base station |
| CN211126061U (en) * | 2019-12-19 | 2020-07-28 | 华南理工大学 | Millimeter wave end-fire circularly polarized antenna and wireless communication equipment |
| CN112768895A (en) * | 2020-12-29 | 2021-05-07 | 华南理工大学 | Antenna, low-frequency oscillator and radiating element |
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