CN211428337U - Vehicle-mounted antenna - Google Patents
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- CN211428337U CN211428337U CN202020143907.4U CN202020143907U CN211428337U CN 211428337 U CN211428337 U CN 211428337U CN 202020143907 U CN202020143907 U CN 202020143907U CN 211428337 U CN211428337 U CN 211428337U
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Abstract
The utility model discloses a vehicle-mounted antenna, which belongs to the antenna field, and comprises a dielectric substrate, a metal radiation patch and a grounding metal plate, wherein the metal radiation patch and the grounding metal plate are respectively arranged at two sides of the dielectric substrate; the metal radiation patch is provided with a plurality of through holes, annular gaps, feed points and a plurality of groups of gap groups; each two through holes are symmetrically arranged by a feed point to form a plurality of pairs of through holes, and a plurality of pairs of through holes corresponding to the through holes are formed in the dielectric substrate; the ring center of the annular gap is superposed with the feed point, and a group of gap groups are arranged between each pair of through holes; each group of gap groups comprises a first V-shaped gap and a second V-shaped gap which are positioned on two sides of the feeding point, and the opening directions of the first V-shaped gap and the second V-shaped gap in the same group of gap groups are the same and are respectively communicated with the annular gaps. The embodiment of the utility model provides an on-vehicle antenna can obtain higher gain when satisfying car communication system to the low section of antenna and omnidirectional's requirement.
Description
Technical Field
The utility model relates to an antenna field, in particular to vehicle antenna.
Background
With the wide spread of domestic automobiles leading to the steep increase of vehicles in road traffic transportation networks, traffic accidents also frequently occur. In order to reduce and prevent accidents, Vehicle-to-Vehicle communication systems (V2V) have been developed, in which a Vehicle-mounted communication antenna is used as a core component of the Vehicle-to-Vehicle communication system, plays an important role in completing information transmission and reception, and functions as a device for receiving and transmitting electromagnetic waves to realize interconversion between electromagnetic waves and electrical signals in a communication frequency band. Therefore, the quality of the antenna performance directly affects the reliability of the entire communication system.
The microstrip slot antenna has the advantages that the microstrip slot antenna is simple in planar structure and easy to conform to a carrier, a feed network and an antenna structure are integrated together, and the like, the microstrip slot antenna is widely concerned since the last 40 th century, the structures of typical rectangular slot antennas are also mentioned in some electromagnetic field textbooks, and with continuous efforts of researchers, various different forms of broadband vehicle-mounted antennas gradually appear in front of people, for example, in 2014, T.Mondal and the like provide a square microstrip vehicle-mounted antenna structure with a multilayer medium based on a Minkowski parting structure. The antenna can cover a DSRC (Dedicated Short-range Communications) communication frequency band, has good directionality and beam width, but does not have all-directional radiativity in a horizontal plane, and cannot meet the requirements of a vehicle-to-vehicle communication system on low profile and all-directional property of the antenna.
Therefore, how to design a vehicle-mounted antenna capable of meeting the requirements of a vehicle-to-vehicle communication system on low profile and omni-directionality of the antenna becomes a problem to be solved urgently at present.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem mentioned in the above-mentioned background art, the embodiment of the utility model provides an on-vehicle antenna can obtain higher gain when satisfying car communication system to the requirement of antenna low section and omnidirectionality, can be arranged in DSRC communication frequency channel and WLAN communication frequency channel well.
The utility model aims at realizing through the following technical scheme:
the vehicle-mounted antenna comprises a dielectric substrate, a metal radiation patch and a grounding metal plate, wherein the metal radiation patch and the grounding metal plate are respectively arranged on two sides of the dielectric substrate;
the metal radiation patch is provided with a plurality of through holes, annular gaps, feed points and a plurality of groups of gaps;
every two through holes are symmetrically arranged by the feeding point to form a plurality of pairs of through holes, and a plurality of through holes corresponding to the through holes are formed in the dielectric substrate;
the ring center of the annular gap is positioned at the feed point, and a group of gap groups are arranged between each pair of through holes;
each group of the gap groups comprises a first V-shaped gap and a second V-shaped gap which are positioned on two sides of the feeding point, and the opening directions of the first V-shaped gap and the second V-shaped gap in the same group of the gap groups are the same and are respectively communicated with the annular gaps.
Further, the through holes are uniformly arranged on a circumference with the feed point as a circle center.
Furthermore, the metal radiation patch is in a regular polygon structure, the number of the edges of the metal radiation patch is even, and the through holes are uniformly formed in each corner of the metal radiation patch.
Furthermore, the metal radiation patch is in a regular hexagon structure, the side length of the metal radiation patch is 0.6 lambda-0.7 lambda, and lambda is the resonance wavelength of the vehicle-mounted antenna in the dielectric substrate.
Further, the through hole is of a circular structure, and the radius range of the through hole is 1.1 mm.
Further, the annular gap is of a circular ring structure, the outer radius of the annular gap is greater than 0.21 lambda and smaller than 0.23 lambda, the inner radius of the annular gap is greater than 0.18 lambda and smaller than 0.2 lambda, and lambda is the resonant wavelength of the vehicle-mounted antenna in the dielectric substrate.
Furthermore, the first V-shaped gap and the second V-shaped gap are both in an equal-side-length V-shaped structure, and the side length of the first V-shaped gap is larger than that of the second V-shaped gap.
Further, the distance between the first V-shaped slot and the feeding point ranges from 0.04 λ to 0.08 λ, the distance between the through hole and the feeding point ranges from 0.4 λ to 0.6 λ, and λ is a resonant wavelength of the vehicle-mounted antenna in the dielectric substrate.
Further, the side length range of the first V-shaped slot is 0.4 lambda-0.6 lambda, wherein lambda is the resonance wavelength of the vehicle-mounted antenna in the dielectric substrate.
Further, the gap widths of the annular gap, the first V-shaped gap and the second V-shaped gap are all 0.5 mm.
The embodiment of the utility model provides an on-vehicle antenna, because be equipped with a plurality of through-holes on the metal radiation paster, every two through-holes set up with feed point symmetry in order to form many pairs of through-holes, and, set up many pairs of through-holes corresponding with the through-hole on the dielectric substrate, adopt such a design structure and be equivalent to loading multiunit short circuit pin on-vehicle antenna, in addition, through setting up a set of gap group between every pair of through-holes, and two V-arrangement gaps in every set of gap group are linked together with the annular gap that uses the feed point as the ring center respectively, so, through loading the short circuit pin and etching V-arrangement gap and annular gap and being linked together on the metal radiation paster, be equivalent to introducing parallel inductance between metal radiation paster and ground connection metal plate in essence, introduce series capacitance on the metal radiation paster surface, be equivalent to introducing reactance to the antenna, can the effectual input impedance that reduces, the current distribution of the radiation patch unit is changed to realize impedance matching; and after the V-shaped gap and the annular gap are etched and communicated, the position of the surface of the radiation patch unit with weaker current and the position near the gap form stronger current distribution, an equivalent current path is increased, the current distribution on the surface is more uniform, the vehicle-mounted antenna can obtain wider impedance bandwidth and good omnidirectional radiation on a horizontal plane, can meet the requirements of a vehicle-vehicle communication system on the low section and the omnidirectional of the antenna and obtain higher gain at the same time, and can be well used in a DSRC communication frequency band and a WLAN communication frequency band.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description 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 to obtain other drawings without creative efforts.
Fig. 1 shows a schematic structural diagram of a vehicle-mounted antenna;
fig. 2 shows a top view of a metallic radiating patch in a vehicle antenna;
FIG. 3 shows reflection loss test plots for different via radii;
FIG. 4 shows a reflection loss test chart for the inner radii of different annular slots;
FIG. 5 shows reflection loss test plots of the outer radii of different annular slots;
FIG. 6 shows reflection loss test plots for different distances from the feed point at the tip of the first V-shaped slot;
FIG. 7 shows reflection loss test plots for different distances of the via from the feed point;
FIG. 8a shows the radiation pattern of the XOZ plane of the vehicle-mounted antenna at the frequency point of 5.2 GHz;
FIG. 8b shows the radiation pattern of the XOY plane of the vehicle antenna at the frequency point of 5.2 GHz;
FIG. 8c shows the XOZ plane radiation pattern of the vehicle antenna at the frequency point of 5.75 GHz;
FIG. 8d shows the radiation pattern of the XOY plane of the vehicle antenna at the frequency point of 5.75 GHz;
FIG. 8e shows the XOZ plane radiation pattern of the vehicle antenna at the frequency point of 5.9 GHz;
fig. 8f shows the radiation pattern of the XOY plane of the vehicle antenna at the frequency point of 5.9 GHz.
Detailed Description
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and 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 therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 to 2, the present invention provides an on-vehicle antenna, which includes a dielectric substrate 10, a metal radiation patch 20 and a grounding metal plate 30, wherein the metal radiation patch 20 and the grounding metal plate 30 are respectively disposed on two sides of the dielectric substrate 10. The metal radiation patch 20 is provided with a plurality of through holes 21, an annular slot 22, a feed point 23 and a plurality of slot groups, each two through holes 21 are symmetrically arranged by the feed point 23 to form a plurality of pairs of through holes, and the dielectric substrate 10 is provided with a plurality of pairs of through holes (not shown) corresponding to the through holes; the ring center of the annular gap 22 is superposed with the feed point 23, and a group of gap groups are arranged between each pair of through holes 21; each group of slot groups comprises a first V-shaped slot 24 and a second V-shaped slot 25 which are positioned at two sides of the feeding point 23, and the opening directions of the first V-shaped slot 24 and the second V-shaped slot 25 in the same group of slot groups are the same and are respectively communicated with the annular slot 22.
Specifically, the metal radiation patch 20 and the grounding metal plate 30 are printed on the upper surface and the lower surface of the dielectric substrate 10, respectively, the metal radiation patch 20 may have a regular polygonal structure or a circular structure, and the metal ground plate 30 may have a square structure having the same size as the dielectric substrate 10. In practical application, a feeding point for coaxial feeding is arranged at the center of the metal radiating patch, an inner conductor of a coaxial cable penetrates through the grounding metal plate and the dielectric substrate to be connected to the feeding point at the center of the metal radiating patch, and an outer conductor of the coaxial cable is connected to the grounding metal plate. The first V-shaped gap is communicated with the annular gap 22 at a position close to the top end of the first V-shaped gap to form an A-shaped gap structure; the second V-shaped slit communicates with the annular slit 22 at a position near the end of the second V-shaped slit to form an a-shaped slit structure. In addition, the metal radiating patch and the ground metal plate are each 1 ounce thick (i.e., 35um thick).
In the embodiment, a plurality of through holes are arranged on the metal radiation patch, every two through holes are symmetrically arranged by a feed point to form a plurality of pairs of through holes, and a plurality of pairs of through holes corresponding to the through holes are arranged on the dielectric substrate, the adoption of the design structure is equivalent to loading a plurality of groups of short circuit pins on the vehicle-mounted antenna, in addition, a group of slot groups are arranged between each pair of through holes, and two V-shaped slots in each group of slot groups are respectively communicated with an annular slot taking the feed point as a ring center, so that the loading of the short circuit pins and the etching and communication of the V-shaped slots and the annular slot on the metal radiation patch are substantially equivalent to the introduction of a parallel inductor between the metal radiation patch and a grounding metal plate, the introduction of a series capacitor on the surface of the metal radiation patch is equivalent to the introduction of a reactance to the antenna, the input impedance of the antenna can be effectively reduced, to achieve impedance matching; and after the V-shaped gap and the annular gap are etched and communicated, the position of the surface of the radiation patch unit with weaker current and the position near the gap form stronger current distribution, an equivalent current path is increased, the current distribution on the surface is more uniform, the vehicle-mounted antenna can obtain wider impedance bandwidth and good omnidirectional radiation on a horizontal plane, can meet the requirements of a vehicle-vehicle communication system on the low section and the omnidirectional of the antenna and obtain higher gain at the same time, and can be well used in a DSRC communication frequency band and a WLAN communication frequency band.
In one embodiment, referring to fig. 2, the plurality of through holes 21 are uniformly arranged on a circumference centered on the feeding point 23. In this embodiment, the vehicle-mounted antenna is uniformly arranged on the circumference with the feeding point 23 as the center of a circle through the plurality of through holes, so that the distance between the adjacent through holes is equal and the distance between each through hole and the feeding point is equal, thereby ensuring that the current distribution of the vehicle-mounted antenna on the surface of the metal radiation patch is more uniform, and being beneficial to obtaining good omni-directionality on the horizontal radiation surface.
In one embodiment, the metal radiating patches are in a regular polygon structure, the number of sides of the metal radiating patches is even, and the through holes are uniformly arranged at each corner of the metal radiating patches.
In one embodiment, the metal radiating patch is in a regular hexagon structure, the side length of the metal radiating patch is 0.6 lambda-0.7 lambda, and lambda is the resonance wavelength of the vehicle-mounted antenna in the dielectric substrate. Specifically, a through hole is respectively arranged at six corners of the metal radiating patch, every two through holes are symmetrically arranged at a feed point to form three pairs of through holes, and a group of gap groups are arranged between each pair of through holes. In practical application, the resonant frequency point f can be used for WLAN communication frequency band (5.15GHz-5.3GHz) and DSRC communication frequency band (5.15GHz-5.3GHz) included in the frequency band of 5GHz-6GHz05.5GHz, relative dielectric constantrSubstituting 4.4 into the formula
The resonance wavelength lambda of the vehicle-mounted antenna in the dielectric substrate is calculated to be equal to 26 mm. In this embodiment, the side length of the metal radiation patch can be adjustedAnd under the action of impedance matching, when the side length of the metal radiation patch is increased, the resonance frequency point of the antenna can move to a low-frequency point, the impedance bandwidth can be reduced, and as an optimal scheme, the side length of the metal radiation patch can be 16.7 mm.
In one embodiment, the through holes 21 are all circular in structure, and the radius of the through holes 21 is 1.1 mm. In a frequency band of 5GHz-6GHz, the frequency band includes a WLAN communication frequency band (5.15GHz-5.3GHz) and a DSRC communication frequency band (5.15GHz-5.3GHz), electromagnetic simulation software is used to calculate reflection loss S11 values for radii r1 of through holes of 0.9mm,1.1mm, and 1.3mm, as shown in fig. 3, it can be known from changes of reflection loss S11 curves of different through hole radii in fig. 3 that the through hole radii have little influence on a resonant frequency point and an impedance bandwidth of a vehicle-mounted antenna, but have a large influence on the depth of the resonant frequency point, and as the radius of a pin increases, the depth of the resonant frequency point is continuously detected, as a preferred scheme, the radius r1 of the through hole takes a value of 1.1mm, and at this time, the optimal downward detection value of the S11 value at the resonant frequency point is maximum, and matching is performed.
In one embodiment, the annular slot 22 is a circular ring structure, the outer radius of the annular slot 22 is greater than 0.21 λ and less than 0.23 λ, the inner radius of the annular slot is greater than 0.18 λ and less than 0.2 λ, and λ is the resonant wavelength of the vehicle-mounted antenna in the dielectric substrate. In this embodiment, the inner radius and the outer radius of the annular gap 22 may play a role in adjusting impedance matching, and electromagnetic simulation software is used to calculate the reflection loss S11 value when the inner radius and the outer radius of the annular gap 22 of the through hole are different values, and the reflection loss curve is as shown in fig. 4 and 5, when the inner radius r2 of the annular gap 22 and the outer radius r3 of the annular gap 22 are increased, the resonant frequency point moves to the right, and the bandwidth is narrowed, because the annular gap can be closer to the through hole by increasing the outer radius and the inner radius of the annular gap, and as the size of the annular gap is increased, the equivalent path of the current becomes longer, the resonant frequency is increased, and the resonant frequency point is caused to move to a high frequency point. Preferably, the inner diameter r2 of the slotted ring is 5mm and the outer diameter r3 is 5.6mm, and the matching is optimal.
In one embodiment, the first V-shaped gap and the second V-shaped gap are both in a V-shaped structure with equal side length, and the side length of the first V-shaped gap is larger than that of the second V-shaped gap. Specifically, for a pair of vias, a first V-shaped slot and a second V-shaped slot between the vias, wherein the tip of the first V-shaped slot is closer to the feed point than the tip of the second V-shaped slot.
In one embodiment, the distance between the first V-shaped slot and the feeding point ranges from 0.04 λ to 0.08 λ, the distance between the through hole and the feeding point ranges from 0.4 λ to 0.6 λ, and λ is a resonant wavelength of the vehicle-mounted antenna in the dielectric substrate.
Referring to fig. 6 and 7, fig. 6 shows the distance d between the top end of the first V-shaped slot and the feeding point1The corresponding reflection loss curves when different values are selected, and FIG. 7 shows the distance d between the through hole and the feeding point3And selecting corresponding reflection loss curves at different values. As can be seen from the changing curves shown in fig. 5 and 6, the distance d between the top end of the first V-shaped slot and the feeding point1And the distance d between the through hole and the feeding point3The influence on the resonant frequency point and the impedance bandwidth of the antenna is small, and only a certain influence on the sounding depth of the reflection loss S11 is caused because d1Is equivalent to the distance between the slotted slot and the short-circuit pin of large A is smaller, and similarly, d3Is reduced, which is equivalent to a reduction in the distance from the slot gap, so d1And d3Only the matching degree of the antenna is greatly influenced, as an optimal scheme, the distance d1 between the first V-shaped slot and the feeding point is 1.5mm, the distance d3 between the through hole and the feeding point is 12.9mm, at this moment, S11 at the resonant frequency point is the lowest, and the matching effect is the best. Preferably, the distance d2 between the second V-shaped slot and the feed point has a value of 11.5 mm.
In one embodiment, the side length of the first V-shaped slot ranges from 0.4 λ to 0.6 λ, where λ is a resonant wavelength of the vehicle-mounted antenna in the dielectric substrate. Preferably, the length of the side of the first V-shaped slot is 12.5mm, at this time, the impedance bandwidth of the antenna is widest, and the length of the side of the second V-shaped slot is 8.5 mm.
In one embodiment, the gap widths of the annular gap, the first V-shaped gap and the second V-shaped gap are all 0.5 mm. In this embodiment, the width of the V-shaped slot and the width of the annular slot have substantially no influence on the antenna resonance point and the impedance bandwidth, and the slot width may be selected to be 0.5mm in order to realize the manufacturing process.
After the vehicle-mounted antenna provided by this embodiment is optimized, the vehicle-mounted antenna size shown in table 1 below can be obtained.
Table 1: optimized vehicle-mounted antenna size
Wherein the opening angle of the first V-shaped gap and the opening angle of the second V-shaped gap are the same, wherein the opening angles are the same
The value is 30 degrees.
The antenna performance of the vehicle-mounted antenna provided by the embodiment at the frequency band of 5.0HHz-6.0GHz is described by combining the vehicle-mounted antenna size shown in table 1. As shown in fig. 8a to 8f, radiation patterns of the vehicular antenna on the XOZ plane and the XOY plane at calculated frequency points of 5.2GHz, 5.75GHz, and 5.9GHz are respectively given, where fig. 8a shows the radiation pattern of the vehicular antenna on the XOZ plane at the frequency point of 5.2GHz, fig. 8b shows the radiation pattern of the vehicular antenna on the XOY plane at the frequency point of 5.2GHz, fig. 8c shows the radiation pattern of the vehicular antenna on the XOZ plane at the frequency point of 5.75GHz, and fig. 8d shows the radiation pattern of the vehicular antenna on the XOY plane at the frequency point of 5.75 GHz; fig. 8E shows a radiation pattern of the XOZ plane of the vehicle-mounted antenna at the frequency point of 5.9GHz, and fig. 8f shows a radiation pattern of the XOY plane of the vehicle-mounted antenna at the frequency point of 5.9GHz, where the radiation pattern is a graph representing a relationship between a radiation characteristic of the antenna and a spatial angle, the XOZ plane has an E plane Phi of 0 degrees, the XOY plane has an H plane Theta of 90 degrees. It can be seen from each radiation pattern that the vehicle-mounted antenna provided by the embodiment has good boundary characteristics and shows vertical polarization characteristics.
Above-mentioned all optional technical scheme can adopt arbitrary combination to form the optional embodiment of this utility model, and the repeated description is no longer given here.
The above description is only for the preferred embodiment of the present invention, and should not be construed as limiting the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. The vehicle-mounted antenna is characterized by comprising a dielectric substrate, a metal radiation patch and a grounding metal plate, wherein the metal radiation patch and the grounding metal plate are respectively arranged on two sides of the dielectric substrate;
the metal radiation patch is provided with a plurality of through holes, annular gaps, feed points and a plurality of groups of gaps;
every two through holes are symmetrically arranged by the feeding point to form a plurality of pairs of through holes, and a plurality of pairs of through holes corresponding to the through holes are formed in the dielectric substrate;
the ring center of the annular gap is superposed with the feed point, and a group of gap groups is arranged between each pair of through holes;
each group of the gap groups comprises a first V-shaped gap and a second V-shaped gap which are positioned on two sides of the feeding point, and the opening directions of the first V-shaped gap and the second V-shaped gap in the same group of the gap groups are the same and are respectively communicated with the annular gaps.
2. The vehicle antenna according to claim 1, wherein the plurality of through holes are uniformly arranged on a circumference centered on the feed point.
3. The vehicle-mounted antenna according to claim 2, wherein the metal radiating patch is in a regular polygon structure, the number of sides of the metal radiating patch is even, and the through holes are uniformly formed at each corner of the metal radiating patch.
4. The vehicle-mounted antenna according to claim 3, wherein the metal radiating patch is in a regular hexagon structure, the side length of the metal radiating patch is 0.6 λ -0.7 λ, and λ is a resonant wavelength of the vehicle-mounted antenna in the dielectric substrate.
5. The vehicle antenna according to any one of claims 1 to 4, wherein the through hole has a circular structure, and a radius of the through hole is 1.1 mm.
6. The vehicle antenna according to any one of claims 1 to 4, wherein the annular slot has a circular ring structure, an outer radius of the annular slot is greater than 0.21 λ and less than 0.23 λ, an inner radius of the annular slot is greater than 0.18 λ and less than 0.2 λ, and λ is a resonant wavelength of the vehicle antenna in the dielectric substrate.
7. The vehicle antenna according to any one of claims 1 to 4, wherein the first V-shaped slot and the second V-shaped slot are both in an equal-side V-shaped structure, and the side length of the first V-shaped slot is greater than that of the second V-shaped slot.
8. The vehicle antenna of claim 7, wherein a distance between the first V-shaped slot and the feeding point is in a range from 0.04 λ to 0.08 λ, a distance between the through hole and the feeding point is in a range from 0.4 λ to 0.6 λ, and λ is a resonant wavelength of the vehicle antenna in the dielectric substrate.
9. The vehicle antenna of claim 7, wherein the first V-shaped slot has a side length in a range of 0.4 λ -0.6 λ, where λ is a resonant wavelength of the vehicle antenna in the dielectric substrate.
10. The vehicle antenna of claim 1, wherein the annular slot, the first V-shaped slot, and the second V-shaped slot each have a slot width of 0.5 mm.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113851827A (en) * | 2021-10-11 | 2021-12-28 | 鹏城实验室 | Low-profile antenna structure and antenna codebook generating method |
| CN114156645A (en) * | 2022-02-10 | 2022-03-08 | 北京理工大学前沿技术研究院 | Novel Beidou slot RDSS antenna and etching method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113851827A (en) * | 2021-10-11 | 2021-12-28 | 鹏城实验室 | Low-profile antenna structure and antenna codebook generating method |
| CN113851827B (en) * | 2021-10-11 | 2023-04-25 | 鹏城实验室 | Low-profile antenna structure and antenna codebook generation method |
| CN114156645A (en) * | 2022-02-10 | 2022-03-08 | 北京理工大学前沿技术研究院 | Novel Beidou slot RDSS antenna and etching method |
| CN114156645B (en) * | 2022-02-10 | 2022-04-22 | 北京理工大学前沿技术研究院 | Novel Beidou slot RDSS antenna and etching method |
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