Transparent antenna applied to vehicle-mounted communication
By integrating a metal mesh thin film material antenna with high light transmittance on automotive glass, using asymmetric structure and groove angle cutting technology, the problem that vehicle-mounted antennas cannot be integrated on automotive glass and are difficult to achieve multi-band coverage is achieved. Multi-functional vehicle communication and aesthetics are improved.
Patent Information
- Application Number
- CN202421368990.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-17
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-06-17
AI Technical Summary
Existing vehicle-mounted antennas cannot be integrated on the automotive glass without blocking the line of sight, and it is difficult to achieve multiple frequency bands in a single antenna, which cannot meet the needs of multi-functional vehicle-mounted communication.
Using metal mesh film material with high light transmittance as the radiation unit and reference ground of the antenna, it is integrated into the automotive glass, and the impedance matching is improved through asymmetric structure distribution and grooved angle tangent to achieve multi-band coverage .
The transparency of the antenna and multi-band coverage are achieved, meeting the needs of multi-functional vehicle-mounted communication, and improving the aesthetics and aerodynamic performance of the car.
Smart Images
Figure CN222507986U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of antennas, in particular to a transparent antenna used for vehicle-mounted communications. Background Art
[0002] With the continuous development of 5G communication technology and autonomous driving technology, people are paying more attention to the field of vehicle communication. As an important interactive component between vehicle wireless communication and external wireless communication, the performance of vehicle antenna will directly affect the quality of vehicle communication. At the same time, with the continuous development of vehicle intelligence, the demand for the performance and aesthetics of vehicle communication systems is also increasing.
[0003] At present, the antennas used in the field of vehicle communications are mostly shark fin antennas, whip antennas and other antennas placed outside the vehicle body, which do not meet the needs of integrated aesthetics and aerodynamics of the vehicle. At the same time, although they meet certain key indicators, they do not solve the problem that the antenna can only be placed in a position that does not block the line of sight. Utility Model Content
[0004] In order to solve the above technical problems, the purpose of the utility model is to provide a transparent antenna for vehicle-mounted communications, which can be integrated into the car glass without blocking the user's line of sight. At the same time, a single antenna can achieve coverage of multiple frequency bands to meet the needs of multi-functional vehicle-mounted communications.
[0005] The technical solution adopted by the utility model is: a transparent antenna used for vehicle-mounted communication, comprising a dielectric substrate, the dielectric substrate is made of organic glass material, and an antenna structure is arranged on the dielectric substrate, wherein:
[0006] The antenna structure comprises a first reference ground, a second reference ground and a first rectangular radiating surface, wherein the first reference ground, the second reference ground and the first rectangular radiating surface are fed in a coplanar waveguide manner;
[0007] The first reference ground and the second reference ground are distributed in an asymmetric structure.
[0008] The asymmetric structural distribution here means that the first reference ground and the second reference ground are not equal in shape, size or structure, and this structure is to improve the impedance matching between 1.7GHz-2.3GHz and 4.95GHz-5GHz.
[0009] In some embodiments, the antenna structure further includes a second rectangular radiating surface, an isosceles trapezoidal radiating surface, a third rectangular radiating surface, a fourth rectangular radiating surface, a fifth rectangular radiating surface, and a sixth rectangular radiating surface, wherein:
[0010] The second rectangular radiating surface is bonded and connected to the first rectangular radiating surface;
[0011] The isosceles trapezoidal radiating surface is fitted and connected to the second rectangular radiating surface;
[0012] The third rectangular radiation surface is fitted and connected to the isosceles trapezoidal radiation surface;
[0013] The fourth rectangular radiation surface is symmetrical to the fifth rectangular radiation surface about the central axis;
[0014] A first gap is provided between the sixth rectangular radiation surface and the fifth rectangular radiation surface, and a second gap is provided between the sixth rectangular radiation surface and the fourth rectangular radiation surface;
[0015] The first gap and the second gap are symmetrical about the central axis.
[0016] Through this preferred step, the first gap and the second gap are used to improve the impedance matching of the intermediate frequency 3.3 GHz-3.6 GHz band.
[0017] In some embodiments, the antenna structure further includes a seventh rectangular radiating surface, an eighth rectangular radiating surface, a first right-angled trapezoid, and a second right-angled trapezoid, wherein:
[0018] The seventh rectangular radiation surface is bonded and connected to the sixth rectangular radiation surface at the upper left side;
[0019] The eighth rectangular radiation surface is bonded and connected to the sixth rectangular radiation surface at the upper right side;
[0020] The first right-angled trapezoid is fitted and connected to the seventh rectangular radiation surface;
[0021] The second right-angled trapezoid is fitted and connected to the eighth rectangular radiation surface;
[0022] The first right-angled trapezoid and the second right-angled trapezoid are symmetrical about a central axis.
[0023] In some embodiments, the first reference ground, the second reference ground, the first rectangular radiating surface, the second rectangular radiating surface, the isosceles trapezoidal radiating surface, the third rectangular radiating surface, the fourth rectangular radiating surface, the fifth rectangular radiating surface, the sixth rectangular radiating surface, the seventh rectangular radiating surface, the eighth rectangular radiating surface, the first right-angled trapezoid, and the second right-angled trapezoid are all made of metal mesh film material.
[0024] In some embodiments, the sheet resistance of the metal mesh film material is 0.15Ω / sq.
[0025] In some embodiments, the first reference ground, the second reference ground, the first rectangular radiating surface, the second rectangular radiating surface, the isosceles trapezoidal radiating surface, the third rectangular radiating surface, the fourth rectangular radiating surface, the fifth rectangular radiating surface, the sixth rectangular radiating surface, the seventh rectangular radiating surface, the eighth rectangular radiating surface, the first right-angled trapezoid, and the second right-angled trapezoid are on the same plane.
[0026] In some embodiments, the first reference ground is a rectangular structure, and the second reference ground is a rectangular structure, wherein:
[0027] The first reference ground has a length of 25 mm and a width of 15 mm;
[0028] The second reference ground has a length of 35 mm and a width of 15 mm;
[0029] The interval between the first reference ground and the first rectangular radiation surface is 0.7 mm;
[0030] The interval between the second reference ground and the first rectangular radiation surface is 0.7 mm.
[0031] The beneficial effects of the utility model are as follows: the transparent antenna proposed in the utility model adopts a metal mesh film material with high light transmittance as the radiation unit and reference ground of the antenna, and the transparent film is processed on the car window glass to realize multifunctional vehicle-mounted communication on the car window glass. At the same time, in order to meet people's multifunctional needs of using 2G, 3G, 4G, 5G, V2X and so on in the car, the utility model introduces multiple modes by means of slotting and cutting corners in the current-intensive places, so that the antenna can realize ultra-wideband characteristics in the frequency band of 1.7GHz to 6GHz. BRIEF DESCRIPTION OF THE DRAWINGS
[0032] Figure 1 It is a front schematic diagram of the transparent antenna of the utility model;
[0033] Figure 2 It is a side schematic diagram of the transparent antenna of the utility model;
[0034] Figure 3 This is a schematic diagram of the optimal dimensions of the transparent antenna of the utility model;
[0035] Figure 4 It is a schematic diagram of the return loss s11 parameter of the transparent antenna of the utility model;
[0036] Figure 5 It is the actual gain curve diagram of the transparent antenna of the utility model;
[0037] Figure 6 It is the radiation pattern of the E plane and the H plane of the transparent antenna of the utility model at the frequency of 0.9 GHz.
[0038] Figure 7 It is the radiation pattern of the E plane and the H plane of the transparent antenna of the utility model at the frequency of 1.7 GHz.
[0039] Figure 8 It is the radiation pattern of the E plane and the H plane of the transparent antenna of the utility model at the frequency of 2.3 GHz.
[0040] Fig. 9 It is the radiation pattern of the E plane and the H plane of the transparent antenna of the utility model at the frequency of 3.3 GHz.
[0041] Fig.10 It is the radiation pattern of the E plane and the H plane of the transparent antenna of the utility model at the frequency of 4.9 GHz.
[0042] Fig.11 It is the radiation pattern of the E plane and the H plane of the transparent antenna of the utility model at a frequency of 5.9 GHz.
[0043] Figure numerals: 1. first reference ground; 2. second reference ground; 3. first rectangular radiating surface; 4. second rectangular radiating surface; 5. isosceles trapezoidal radiating surface; 6. third rectangular radiating surface; 7. fourth rectangular radiating surface; 8. fifth rectangular radiating surface; 9. first gap; 10. second gap; 11. first right-angled trapezoid; 12. second right-angled trapezoid; 13. sixth rectangular radiating surface; 14. seventh rectangular radiating surface; 15. eighth rectangular radiating surface. DETAILED DESCRIPTION
[0044] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0045] It should be noted that, for the convenience of description, only the parts related to the relevant utility model are shown in the drawings. In the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other.
[0046] It should be understood that the "system", "device", "unit" and / or "module" used in this application is a method for distinguishing different components, elements, parts, portions or assemblies at different levels. However, if other words can achieve the same purpose, the word can be replaced by other expressions.
[0047] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not refer to the singular, but also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements. The elements defined by the sentence "includes a..." do not exclude the existence of other identical elements in the process, method, commodity or device that includes the elements.
[0048] In the description of the embodiments of the present application, "plurality" means two or more than two. The following terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.
[0049] The utility model provides a transparent antenna for vehicle-mounted communication, referring to Figure 1 and Figure 2 , comprising a dielectric substrate, the dielectric substrate is made of organic glass material, and an antenna structure is arranged on the dielectric substrate, wherein:
[0050] The antenna structure includes a first reference ground 1, a second reference ground 2, a first rectangular radiating surface 3, a second rectangular radiating surface 4, an isosceles trapezoidal radiating surface 5, a third rectangular radiating surface 6, a fourth rectangular radiating surface 7, a fifth rectangular radiating surface 8, a sixth rectangular radiating surface 13, a seventh rectangular radiating surface 14, an eighth rectangular radiating surface 15, a first right-angled trapezoid 12 and a second right-angled trapezoid 13.
[0051] The first reference ground 1, the second reference ground 2 and the first rectangular radiation surface 3 are fed in a coplanar waveguide manner;
[0052] The first reference ground 1 and the second reference ground 2 are distributed in an asymmetric structure.
[0053] The second rectangular radiating surface 4 is bonded and connected to the first rectangular radiating surface 3;
[0054] The isosceles trapezoidal radiating surface 5 is closely connected to the second rectangular radiating surface 4;
[0055] The third rectangular radiation surface 6 is closely connected to the isosceles trapezoidal radiation surface 5;
[0056] The fourth rectangular radiation surface 7 and the fifth rectangular radiation surface 8 are symmetrical about the central axis;
[0057] A first gap 9 is provided between the sixth rectangular radiation surface 13 and the fifth rectangular radiation surface 8 , and a second gap 10 is provided between the sixth rectangular radiation surface 13 and the fourth rectangular radiation surface 7 ;
[0058] The first gap 9 and the second gap 10 are symmetrical about the central axis.
[0059] The seventh rectangular radiation surface 14 is bonded and connected to the sixth rectangular radiation surface 13 at the upper left side;
[0060] The eighth rectangular radiation surface 15 is bonded and connected to the sixth rectangular radiation surface 13 at the upper right side;
[0061] The first right-angled trapezoid 11 is closely connected to the seventh rectangular radiation surface 14;
[0062] The second right-angled trapezoid 12 is closely connected to the eighth rectangular radiation surface 15;
[0063] The first right-angled trapezoid 11 and the second right-angled trapezoid 12 are symmetrical about the central axis.
[0064] On this basis, the first reference ground 1, the second reference ground 2, the first rectangular radiating surface 3, the second rectangular radiating surface 4, the isosceles trapezoidal radiating surface 5, the third rectangular radiating surface 6, the fourth rectangular radiating surface 7, the fifth rectangular radiating surface 8, the sixth rectangular radiating surface 13, the seventh rectangular radiating surface 14, the eighth rectangular radiating surface 15, the first right-angled trapezoid 11, and the second right-angled trapezoid 12 are all made of metal mesh film material and are on the same plane.
[0065] The sheet resistance of the metal mesh film material is 0.15Ω / sq.
[0066] The dotted lines in the figure are for easy understanding and do not represent the antenna unit itself.
[0067] Based on the above structure, refer to Figure 3 , and also gives a set of specific parameters:
[0068] The first reference ground 1 is a rectangle with a length of 25 mm and a width of 15 mm; the second reference ground 2 is a rectangle with a length of 35 mm and a width of 15 mm.
[0069] The first rectangular radiation surface 3 is 36 mm long and 2 mm wide.
[0070] The gap between the first reference ground 1 and the first rectangular radiation surface 3 is 0.7 mm.
[0071] The gap between the second reference ground 2 and the first rectangular radiation surface 3 is 0.7 mm.
[0072] The second rectangular radiation surface 4 is 2 mm long and 6 mm wide;
[0073] The lower base of the isosceles trapezoidal radiation surface 5 is 6 mm, the upper base is 26 mm, and the height is 10 mm.
[0074] The third rectangular radiation surface 6 is 8 mm long and 26 mm wide.
[0075] The fourth rectangular radiation surface 7 and the fifth rectangular radiation surface 8 are both 7 mm long and 5 mm wide.
[0076] The sixth rectangular radiation surface 13 is 43 mm long and 8 mm wide.
[0077] The first gap 9 and the second gap 10 are both 39 mm long and 2 mm wide.
[0078] The seventh rectangular radiation surface 14 is 3 mm long and 2 mm wide.
[0079] The first right-angled trapezoid 11 and the second right-angled trapezoid 12 both have right-angled sides of 7 mm, short-side base lengths of 24 mm, and long-side base lengths of 31 mm.
[0080] The antenna return loss is below -10dB and covers the 0.82-0.96GHz frequency band and the 1.7-6GHz frequency band.
[0081] Based on the above structure and parameter settings, the utility model also provides relevant experimental simulation data. Figure 4 It is a schematic diagram of the return loss s11 parameter of the transparent antenna of the utility model; Figure 5 It is the actual gain curve diagram of the transparent antenna of the utility model; Figure 6-Figure 11 It is the radiation pattern of the E-plane and the H-plane of the utility model at different frequency points.
[0082] In summary, the utility model uses a transparent film material with high light transmittance as the radiation unit of the antenna, which is integrated on the car glass to achieve an integrated design of the antenna and the car, and the light transmittance reaches more than 75%, which not only has a beautiful effect, but also hides the antenna and is not easy to be found. The multifunctional transparent antenna for car glass combines the advantages of hiding and beauty.
[0083] Existing monopole antennas can rarely cover the operating frequency bands of 0.82GHz-0.96GHz and 1.7GHz-6GHz. The utility model adopts the method of opening slots and grooves at the current-intensive places to expand the bandwidth of the microstrip antenna, so that the antenna can achieve ultra-wideband design. It covers multiple frequency bands of vehicle-mounted communications and meets the needs of multi-functional vehicle-mounted communications.
[0084] The above is a specific description of the preferred implementation of the utility model, but the invention of the utility model is not limited to the described embodiments. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the utility model. These equivalent deformations or substitutions are all included in the scope defined by the claims of this application.
Claims
1. A transparent antenna for vehicle-mounted communications, characterized in that: It includes a dielectric substrate, the dielectric substrate is made of organic glass material, and an antenna structure is arranged on the dielectric substrate, wherein: The antenna structure comprises a first reference ground, a second reference ground and a first rectangular radiating surface, wherein the first reference ground, the second reference ground and the first rectangular radiating surface are fed in a coplanar waveguide manner; The first reference ground and the second reference ground are distributed in an asymmetric structure.
2. A transparent antenna for vehicle-mounted communication according to claim 1, characterized in that: The antenna structure further includes a second rectangular radiating surface, an isosceles trapezoidal radiating surface, a third rectangular radiating surface, a fourth rectangular radiating surface, a fifth rectangular radiating surface and a sixth rectangular radiating surface, wherein: The second rectangular radiating surface is bonded and connected to the first rectangular radiating surface; The isosceles trapezoidal radiating surface is fitted and connected to the second rectangular radiating surface; The third rectangular radiation surface is fitted and connected to the isosceles trapezoidal radiation surface; The fourth rectangular radiation surface is symmetrical to the fifth rectangular radiation surface about the central axis; A first gap is provided between the sixth rectangular radiation surface and the fifth rectangular radiation surface, and a second gap is provided between the sixth rectangular radiation surface and the fourth rectangular radiation surface; The first gap and the second gap are symmetrical about the central axis.
3. A transparent antenna for vehicle-mounted communication according to claim 2, characterized in that: The antenna structure further includes a seventh rectangular radiating surface, an eighth rectangular radiating surface, a first right-angled trapezoid, and a second right-angled trapezoid, wherein: The seventh rectangular radiation surface is bonded and connected to the sixth rectangular radiation surface at the upper left side; The eighth rectangular radiation surface is bonded and connected to the sixth rectangular radiation surface at the upper right side; The first right-angled trapezoid is fitted and connected to the seventh rectangular radiation surface; The second right-angled trapezoid is fitted and connected to the eighth rectangular radiation surface; The first right-angled trapezoid and the second right-angled trapezoid are symmetrical about a central axis.
4. A transparent antenna for vehicle-mounted communication according to claim 3, characterized in that: The first reference ground, the second reference ground, the first rectangular radiating surface, the second rectangular radiating surface, the isosceles trapezoidal radiating surface, the third rectangular radiating surface, the fourth rectangular radiating surface, the fifth rectangular radiating surface, the sixth rectangular radiating surface, the seventh rectangular radiating surface, the eighth rectangular radiating surface, the first right-angled trapezoid, and the second right-angled trapezoid are all made of metal mesh film material.
5. A transparent antenna for vehicle-mounted communication according to claim 4, characterized in that: The sheet resistance of the metal mesh film material is 0.15Ω / sq.
6. The transparent antenna for vehicle-mounted communication according to claim 4, characterized in that: The first reference ground, the second reference ground, the first rectangular radiating surface, the second rectangular radiating surface, the isosceles trapezoidal radiating surface, the third rectangular radiating surface, the fourth rectangular radiating surface, the fifth rectangular radiating surface, the sixth rectangular radiating surface, the seventh rectangular radiating surface, the eighth rectangular radiating surface, the first right-angled trapezoid, and the second right-angled trapezoid are on the same plane.
7. The transparent antenna for vehicle-mounted communication according to claim 1, characterized in that: The first reference ground is a rectangular structure, and the second reference ground is a rectangular structure, wherein: The first reference ground has a length of 25 mm and a width of 15 mm; The second reference ground has a length of 35 mm and a width of 15 mm; The distance between the first reference ground and the first rectangular radiation surface is 0.7 mm; The interval between the second reference ground and the first rectangular radiation surface is 0.7 mm.