Broadband automobile navigation glass antenna

Abstract

The invention relates to a broadband automobile navigation glass antenna. The broadband automobile navigation glass antenna comprises a first component, a second component, a third component, a fourth component, a fifth component and a sixth component which are arranged on automobile glass. According to the broadband automobile navigation glass antenna disclosed by the invention, the functional glass and the antenna device are integrally designed, so that the problems of limited layout, crowded space, unattractive appearance and the like of a traditional antenna are solved; on the premise that the inherent mechanical performance of the automobile glass is guaranteed, through holes are avoided, a plurality of frequency points of satellite navigation positioning are covered by ultra-wide impedance bandwidth and axial ratio bandwidth, and the positioning accuracy is greatly improved; according to the conformal broadband satellite navigation glass antenna, the gain flatness of the antenna is good, and the antenna has stable directional diagram characteristics, so that the antenna provides stable signals in a frequency band, the stability of signal quality is ensured, the antenna is not influenced by frequency change, and finally, the conformal broadband satellite navigation glass antenna with the advantages of compact structure, wide working bandwidth and the like is designed.

Description

Technical Field

[0001] The invention relates to the technical field of antennas, in particular to a broadband automobile navigation glass antenna. Background Art

[0002] In the wave of the "New Four Modernizations" of the global automotive industry, the smart car industry has become an important driving force for the transformation and upgrading of my country's automotive industry. Satellite navigation antennas play a vital role in the positioning, navigation and safe driving of smart cars. At present, navigation antennas are often installed in the center console inside the car or in the shark fin antenna outside the car. The antenna arranged in the center console is easily affected by the metal body, resulting in deterioration of performance; the navigation antenna placed in the shark fin is integrated with other functional antennas, and different antennas affect each other, causing the navigation antenna's directional pattern to be severely deformed.

[0003] Through the study of existing car navigation antennas, it is found that different navigation antennas have different problems: 1) Traditional automotive shark fin antennas, which integrate antennas for MIMO-LTE, GPS, WLAN, and WAVE frequency bands. The GPS antenna uses a patch structure and is placed on a square ceramic sheet on a metal floor. The operating bandwidth covers the 1.575GHz frequency band, but because the GPS antenna and other functional antennas are compactly integrated in the shark fin, they will affect each other, resulting in deterioration of the radiation pattern performance.

[0004] 2) For the structure of the patch antenna with four square ring grooves, it can cover the working bandwidth of 1.565-1.655GHz. The bandwidth range of this antenna is too narrow, and only single frequency is achieved. As the requirements for navigation and positioning accuracy are getting higher and higher, it cannot meet the needs of broadband navigation applications.

[0005] 3) In order to cover the 1.227 GHz and 1.575 GHz bands and ensure effective radiation of energy, a 10 mm air gap is placed between the upper and lower dielectric substrates using a coupled feeding method, which cannot meet the design requirements of low-profile automotive glass.

[0006] 4) Using proximity coupled probe feed, although the operating frequency band covers 1.164-1.239 GHz and 1.559-1.610 GHz, the antenna needs to be fed through holes, which is not suitable for the design of glass antennas.

[0007] 5) A wide-slot square-slot antenna fed by a coplanar waveguide is printed on a square FR4 substrate with a size of 120 mm. The antenna provides two resonances at 0.8 GHz and 1.4 GHz through an L-shaped feeding structure, and rectangular stubs are added at the diagonal positions of the square slot to generate circular polarization near 1 GHz in the low frequency range. Although the physical production of this antenna is simple, its operating bandwidth is relatively narrow and cannot meet the requirements of high positioning accuracy. Summary of the Invention

[0008] To this end, the technical problem to be solved by the present invention is to overcome the following problems in the prior art: 1. Traditional automotive satellite navigation antennas, such as the shark fin antenna installed outside the vehicle, are easily affected by the external environment and are not very aesthetically pleasing. Moreover, different functional antennas are encapsulated inside the shark fin antenna, such as modules for MIMO-LTE, GPS, WLAN, and WAVE. The spacing between them is very small, and they are prone to mutual influence, resulting in the deterioration of the performance of the GPS patch antenna.

[0009] 2. For patch satellite navigation antennas, the frequency bands they cover are usually single-band or dual-band and cannot meet the requirement of broadband coverage. With the continuous improvement of the demand for navigation positioning, patch antennas cannot meet the high-precision navigation positioning function.

[0010] 3. For coupled-feed navigation antennas, to ensure effective radiation of energy, a relatively high profile height is required, which does not meet the low-profile requirement of automotive glass antennas.

[0011] 4. For probe-feed navigation antennas, the probe-feed method not only destroys the stability of the glass structure, but also has a complex overall structure and high manufacturing cost.

[0012] 5. For common wide-slot coplanar waveguide navigation antennas, broadband performance is usually achieved by using two resonance points, resulting in a limited operating bandwidth. Whether it is the impedance bandwidth or the axial ratio bandwidth, it is difficult to cover many positioning frequency points at the same time, and the gain flatness of the antenna is poor, resulting in unstable signal reception.

[0013] To solve the above technical problems, the present invention provides a broadband automotive navigation glass antenna, including: Component One, which serves as the floor of the antenna. A groove One is provided at the center of Component One. A groove Two is provided between the groove One and the edge of Component One, and the groove Two is used as a feed port; Component Two, which is a feed microstrip structure. The cross-section of Component Two is in the shape of Γ. One end of Component Two is disposed in the groove Two, and the other end of Component Two is located in the groove One; Component Three, which is a patch structure for guiding current. The cross-section of Component Three is in the shape of Γ, and Component Three is located in the groove One. One end of Component Three is connected to the corner position of Component Two located in the groove One; Component Four, which is a coupling part. The cross-section of Component Four is in the shape of Γ, and Component Four is located in the groove One; Component Five, which is a grounding strip for increasing the path of the current. The cross-section of Component Five is in the shape of U. Component Five is located in the groove One, and the two ends of the U shape of Component Five are connected to the inner wall of the groove One; Component Six, which is a coupling stub. A number of Component Six are provided, and several Component Six are arranged outside Component One. One end of Component Six is connected to the outer wall of Component One, and Component Six is used to adjust parameters to obtain the broadband required by the antenna; Component One, Component Two, Component Three, Component Four, Component Five, and Component Six are installed on the automotive glass. The broadband automotive navigation glass antenna of the present invention integrates the satellite navigation antenna with the automotive sunroof glass, which not only meets people's needs for the panoramic sunroof of the vehicle, but also saves space and improves the signal reception ability and anti-interference ability of the navigation antenna.

[0014] In an embodiment of the present invention, Component One is a circular thin sheet. The groove One is provided at the center position of Component One, and the cross-section of the groove One is rectangular. The four sides of the groove One are respectively the first side, the second side, the third side, and the fourth side. The groove Two is provided between the first side and the outer circumference of Component One, and the groove Two is a rectangular groove. The two ends of Component Five are connected to the fourth side.

[0015] In an embodiment of the present invention, the first side is divided into two parts by the groove Two. The two parts into which the first side is divided are respectively opposite to one side of Component Two and one side of Component Three. A boss One is provided on the part of the first side opposite to Component Three. The boss One protrudes towards the center of the groove One, and the boss One is a rectangular boss.

[0016] In an embodiment of the present invention, the number of Component Six is 8, and 8 Component Six are grouped in pairs.

[0017] In an embodiment of the present invention, Component Three includes Component Seven and Component Eight. Both Component Seven and Component Eight are rectangular stubs, and the length of Component Eight is less than that of Component Seven. Component Seven is disposed opposite to the boss One, and Component Eight is disposed opposite to the second side.

[0018] In one embodiment of the present invention, one end of component four is disposed opposite to component eight, and the other end of component four extends towards one side of the third side and is disposed opposite to the third side.

[0019] In one embodiment of the present invention, the end of component seven away from the first side forms a protruding step relative to the end of component two away from the first side.

[0020] In one embodiment of the present invention, a gap is left between component four and component eight.

[0021] In one embodiment of the present invention, the impedance bandwidth of the antenna is: 1.03 GHz - 2.24 GHz, the axial ratio bandwidth is: 1.00 GHz - 1.77 GHz, and the gain bandwidth above 3 dB is: 0.9 GHz - 1.71 GHz.

[0022] In one embodiment of the present invention, the cross-section of component six is rectangular.

[0023] The broadband automotive navigation glass antenna of the present invention has the following beneficial effects compared with the prior art: 1) Integrating the functional glass and the antenna device in design to avoid problems such as limited layout, crowded space, and unsightliness encountered by traditional antennas. 2) On the premise of ensuring the inherent mechanical properties of the automotive glass, via holes are avoided, and an ultra-wide impedance bandwidth and axial ratio bandwidth cover many frequency points for satellite navigation and positioning, greatly improving the positioning accuracy. 3) The antenna has good gain flatness and stable radiation pattern characteristics, enabling the antenna to provide a stable signal within the frequency band, ensuring the stability of the signal quality and being unaffected by frequency changes. Finally, a conformal broadband satellite navigation glass antenna with advantages such as a compact structure and a wide operating bandwidth is designed.

[0024] The broadband automotive navigation glass antenna of the present invention: 1) Aiming at the problems that the current shark fin antenna is easily affected by the external environment when placed outside the vehicle, and at the same time, the spacing between different functional antennas is small and they are prone to coupling interference with each other, the present invention proposes to combine the functional glass with the satellite navigation antenna to solve the problem of easy damage to the exposed antenna. At the same time, the large-area skylight glass of the vehicle can be fully utilized to ensure the stability of the performance of the navigation antenna. 2) Aiming at the problem that the working frequency band of the patch navigation antenna covers a single band or a dual band and cannot achieve broadband performance, the present invention uses a coplanar waveguide antenna for design to achieve broadband performance. 3) For the coupled-fed multi-layer navigation antenna with a problem of relatively high profile height, the present invention designs the feeding structure and the antenna radiation part on the same plane to achieve effective radiation of energy while ensuring a low profile. 4) For the navigation antenna fed by a probe, a via structure needs to be introduced. The present invention adopts a conformal design of glass and the antenna, avoiding drilling holes in the glass, ensuring the overall stability of the glass, and having a relatively simple structure; 5) For the existing navigation antenna with a wide-slot coplanar waveguide, the bandwidth brought by the two resonant points is very limited and cannot cover many positioning frequency points. The present invention realizes the performance of a wide frequency band through the combined action of four resonant points, ensuring that the working bandwidth covers many positioning frequency points and improving the accuracy of navigation and positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to make the content of the present invention easier to be clearly understood, the following further details the present invention according to specific embodiments of the present invention in conjunction with the drawings, where Figure 1 is a schematic structural diagram of a broadband automotive navigation glass antenna in a preferred embodiment of the present invention; Figure 2 is a dimensional drawing of a broadband automotive navigation glass antenna in a preferred embodiment of the present invention; Figure 3 is a curve graph of the antenna reflection coefficient characteristic in a preferred embodiment of the present invention; Figure 4 is a curve graph of the antenna axial ratio characteristic in a preferred embodiment of the present invention; Figure 5 is a curve graph of the antenna gain characteristic in a preferred embodiment of the present invention; Figure 6 is a two-dimensional radiation pattern of the antenna at 1.268 GHz in a preferred embodiment of the present invention; Figure 7 is a two-dimensional radiation pattern of the antenna at 1.575 GHz in a preferred embodiment of the present invention; Figure 8 is a comparison graph of the reflection coefficient characteristic in a preferred embodiment of the present invention; Figure 9 is a comparison graph of the axial ratio characteristic in a preferred embodiment of the present invention; Figure 10 is the structural evolution process of a broadband automotive navigation glass antenna in a preferred embodiment of the present invention Figure 1 ; Figure 11 is the structural evolution process of a broadband automotive navigation glass antenna in a preferred embodiment of the present invention Figure 2 ; Figure 12 is the structural evolution process of a broadband automotive navigation glass antenna in a preferred embodiment of the present invention Figure 3 ; Figure 13 is the structural evolution process of a broadband automotive navigation glass antenna in a preferred embodiment of the present inventionFigure 4 。

[0026] Description of the reference numerals in the accompanying drawings: Groove 1, Groove 11, First side 12, First boss 121, Second side 13, Third side 14, Fourth side 15, Component 1 2, Component 2 3, Component 3 4, Component 7 41, Component 8 42, Component 4 5, Component 5 6, Component 6 7. Detailed implementation mode

[0027] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and be able to implement it, but the embodiments cited are not intended to limit the present invention.

[0028] Refer to Figure 1 As shown, the broadband automotive navigation glass antenna of the present invention includes several parts: Component 1 2, Component 2 3, Component 3 4, Component 4 5, Component 5 6 and Component 6 7; Component 1 2 serves as the floor of the antenna. A groove 1 is provided at the center of the Component 1 2, and a groove 11 is provided between the groove 1 and the edge of the Component 1 2. The groove 11 is used as the feeding port; Component 2 3 is a feeding microstrip structure, and the cross-section of the Component 2 3 is in the shape of Γ. One end of the Component 2 3 is arranged in the groove 11, and the other end of the Component 2 3 is located in the groove 1; Component 3 4 is a patch structure for guiding current, and the cross-section of the Component 3 4 is in the shape of Γ. The Component 3 4 is located in the groove 1, and one end of the Component 3 4 is connected to the corner position of the Component 2 3 located in the groove 1; Component 4 5 is a coupling part, and the cross-section of the Component 4 5 is in the shape of Γ. The Component 4 5 is located in the groove 1; Component 5 6 is a grounding strip for increasing the path of the current, and the cross-section of the Component 5 6 is in the shape of U. The Component 5 6 is located in the groove 1, and the two ends of the U shape of the Component 5 6 are connected to the inner wall of the groove 1; Component 6 7 is a coupling stub, and several Component 6 7 are provided. Several Component 6 7 are arranged outside the Component 1 2. One end of the Component 6 7 is connected to the outer wall of the Component 1 2. The Component 6 7 is used to adjust parameters to obtain the broadband required by the antenna; the Component 1 2, Component 2 3, Component 3 4, Component 4 5, Component 5 6 and Component 6 7 are installed on the automotive glass.

[0029] For the above-mentioned broadband automotive navigation glass antenna, the floor in the antenna structure is a circular structure (Component 1 2) with a groove dug in the center. A Γ-shaped feeding microstrip structure (Component 2 3) is introduced by removing one side of the floor; and a Γ-shaped stub (Component 3 4) is extended at the other end of the feeding structure. At the same time, a Γ-shaped coupling part (Component 4 5) is added above the Component 3 4; a U-shaped grounding strip (Component 5 6) is introduced on the right side in the groove and four pairs of rectangular stubs (Component 6 7) are loaded at the four corners of the floor.

[0030] Reference Figure 2 As shown, the specific parameters of the antenna are as follows: H=2.1mm; L=100mm; R=50mm; T=60mm; a=6mm; b=6mm; g=0.5mm; L1=15mm; L2=26mm; L3=12mm; L4=35mm; L5=11mm; L6=32mm; WS=5mm; W1=6.5mm; W2=5mm; W3=5mm; W4=4mm; W5=3mm; W6=2mm.

[0031] The performance of the antenna is as follows Figures 3 - 7 As shown, the antenna performance can fully cover many satellite positioning frequency points. Among them, the impedance bandwidth is: 1.03GHz-2.24GHz, the axial ratio bandwidth is: 1.00GHz-1.77GHz, and the gain bandwidth above 3dB is: 0.9GHz-1.71GHz. At the frequency point B3 (1.268GHz), the radiation direction is directly above +z direction, with wide beam characteristics and the positive direction gain reaches 3.48dBic; at the frequency point L1 (1.575GHz), it has wide beam characteristics and the positive direction gain reaches 3.55dBic.

[0032] In the above structure, the component 1 2 is in the shape of a circular sheet, the groove 1 is arranged at the center of the component 1 2, and the cross section of the groove 1 is rectangular, the four sides of the groove 1 are respectively divided into a first side 12, a second side 13, a third side 14 and a fourth side 15, the groove 2 11 is arranged between the first side 12 and the outer circumference of the component 1 2, and the groove 2 11 is a rectangular groove, and the two ends of the component 5 6 are connected to the fourth side 15. The Γ-shaped side of the component 2 3 located in the groove 1 is opposite to the first side 12, and the two right-angled sides of the component 3 4 are opposite to the first side 12 and the second side 13 respectively.

[0033] In the above structure, the first side 12 is divided into two parts by the groove 11, and the two parts of the first side 12 are respectively opposite to one side of the component 2 3 and one side of the component 3 4, and the part of the first side 12 opposite to the component 3 4 is provided with a boss 121, and the boss 121 protrudes toward the center of the groove 1, and the boss 121 is a rectangular boss.

[0034] In the above structure, the cross section of the component 67 is rectangular. The number of the components 67 is 8, and the 8 components 67 are grouped in pairs. The 8 components 67 are divided into four groups, and the four groups of components 67 are arranged in a circular array with the center of the component 12 as the center.

[0035] In the above structure, the component three 4 includes a component seven 41 and a component eight 42. Both the component seven 41 and the component eight 42 are rectangular branches, and the length of the component eight 42 is less than that of the component seven 41. The component seven 41 is disposed opposite to the first boss 121, and the component eight 42 is disposed opposite to the second side 13. One end of the component four 5 is disposed opposite to the component eight 42, and the other end of the component four 5 extends toward the third side 14 and is disposed opposite to the third side 14. There is a gap between the component four 5 and the component eight 42. The end of the component seven 41 away from the first side 12 forms a protruding step relative to the end of the component two 3 away from the first side 12.

[0036] In the above structure, the impedance bandwidth of the antenna is: 1.03 GHz - 2.24 GHz, the axial ratio bandwidth is: 1.00 GHz - 1.77 GHz, and the gain bandwidth above 3 dB is: 0.9 GHz - 1.71 GHz.

[0037] Referring to Figures 10 - 13 As shown, the construction process of the broadband automotive navigation glass antenna of the present invention is as follows: Components one 2, two 3, three 4, four 5, five 6 and six 7 are sequentially arranged on a 100 mm × 100 mm window glass. The glass has a dielectric constant of 7, a loss tangent of 0.01, and a thickness of 2.1 mm.

[0038] First, a simple conformal antenna is designed on the above glass for the antenna Figure 10 The specific structure is a circular ground structure with an asymmetric square slot dug in the center. The feeding is jointly composed of a Γ-shaped patch and an extended rectangular branch. The impedance bandwidth covers at low frequencies: 0.96 GHz - 1.03 GHz and 1.11 GHz - 1.45 GHz, and the frequency band near 1.575 GHz cannot be covered yet. Figure 10 The axial ratio of the structure in [reference] only covers: 1.02 GHz - 1.16 GHz, and the index of covering many frequency points required for navigation positioning has not been reached yet. To improve the axial ratio performance, a short branch is added to one end of the rectangular branch to form a lying Γ-shaped structure, and at the same time, a new Γ-shaped patch is added above to form Figure 11 the structure in [reference]. The introduction of the Γ-shaped patch generates a new minimum axial ratio point at a high frequency of 1.5 GHz. Figure 11 The axial ratio bandwidth of the structure in [reference] basically covers 1.06 GHz to 1.58 GHz. However, its impedance matching is poor in the range of 1.3 GHz to 1.8 GHz. To improve the impedance performance, a U-shaped grounding strip is introduced on the right side of the slot in Figure 11 the structure in [reference] to obtain Figure 12Middle structure. The U-shaped grounding strip increases the current path. Under the combined action of four resonance points, the impedance characteristics are greatly improved, making the frequency bands of 0.96 GHz - 1.88 GHz and 1.96 GHz - 2.30 GHz both remain below -10 dB. Figure 12 The middle structure compared with Figure 11 The impedance bandwidth of the middle structure is extended by 540 MHz. To fully cover the required frequency band and ensure sufficient margin, at Figure 12 Four pairs of parallel coupling stubs are introduced at the four corners of the middle structure, achieving three minimum axial ratio points, thus greatly improving the axial ratio bandwidth. Figure 12 The axial ratio bandwidth of the middle structure is widened from 1.12 GHz - 1.60 GHz to 1.00 GHz - 1.77 GHz, an extension of 290 MHz. Finally Figure 13 The impedance bandwidth of the middle structure is 74.01% (1.03 GHz - 2.24 GHz), and the axial ratio bandwidth is 55.60% (1.00 GHz - 1.77 GHz).

[0039] The basic model of the antenna consists of a circular ground structure (component one 2) with an asymmetric slot (groove one 1) dug in the center, a Γ-shaped microstrip feeding part (component two 3), and a rectangular stub (component seven 41) extended at one end of component two 3. Among them, in order to obtain good performance at low frequencies, by applying an asymmetric ground structure (component one 2) and adjusting the height difference between the left and right ground structures of the feed, the lowest point of the circular polarization axial ratio is obtained. At the same time, the length of component seven 41 can be adjusted to improve the impedance matching characteristics at low frequencies. In order to generate resonance at high frequencies, a short stub (component eight 42) is extended at the other end of component seven 41 to form a new Γ-shaped patch structure (component three 4), which plays a role in guiding current. By increasing the length of component eight 42, the overall left shift of the impedance bandwidth is achieved. In order to obtain circular polarization performance at high frequencies, a Γ-shaped patch (component four 5) is added above component three 4, and by adjusting the gap between component three 4 and component four 5, the axial ratio performance of the antenna is improved. The introduction of component four 5 avoids the cancellation of the current on component four 5 and the current at the edge of the left slot while ensuring the improvement of the axial ratio performance, ensuring the stability of the high-frequency gain. In order to expand the dual frequency into a wideband, a U-shaped grounding strip (component five 6) is introduced on the right side of the slot to increase the current path, thereby improving the impedance bandwidth performance at low frequencies. To further improve the antenna performance and ensure full coverage of the required frequency band, a pair of coupling stubs (component six 7) are added to each of the four corners of component one 2. Each pair of stubs has the same height and width and a certain spacing. Finally, by adjusting the parameters of the stubs, the broadband automotive navigation glass antenna is obtained. In the present invention, each pair of stubs adopts a rectangular structure, which is also applicable to other structures such as chamfered structures, semi-circular structures, etc.

[0040] Among them, component seven 41, as an extension of the feeding part, has a stronger current at low frequencies, increasing the current path and thus improving the low frequency; the introduction of component four 5 allows component seven 41 to supply coupled current to component four 5. The structure of component four 5 regularizes the nature of the current, providing a new horizontal current and vertical current, thus achieving circular polarization. The distance at which the coupling ability is most effective is found by adjusting the parameters through the gap in between; the stability of the high-frequency gain is due to the fact that while introducing component four 5 to provide circular polarization for the high frequency, it avoids being too close to the left slot, causing current cancellation. For example, a rectangle would be too close to the left slot edge, and the current directions at these two places are opposite, which would lead to cancellation and a decrease in gain.

[0041] The broadband automotive navigation glass antenna of the present invention: 1) It has wide impedance bandwidth and wide axial ratio bandwidth characteristics. The Γ-shaped feeding structure is combined with an asymmetric circular ground plane to generate resonance at low frequencies and have certain circular polarization performance. A Γ-shaped patch is introduced above the feeding structure, and the gap between the feeding structure and the Γ-shaped patch is adjusted to better achieve the orthogonal mode of the wide-gap antenna. The U-shaped grounding strip increases the current path, making the resonance more obvious, and the coupling stubs at the four corners of the floor further expand the impedance bandwidth and axial ratio bandwidth. The navigation antenna achieves an impedance bandwidth of 74.01% (1.03 GHz - 2.24 GHz) under the action of four resonance points, and an axial ratio bandwidth of 55.60% (1.00 GHz - 1.77 GHz) under the cooperation of the three lowest axial ratio points, thus achieving a broadband effect.

[0042] 2) The Γ-shaped patch radiating in the slot is used to avoid current cancellation with the edge of the square slot while improving the axial ratio performance, ensuring the stability of the high-frequency gain, and thus improving the gain flatness within the entire frequency band. The gain bandwidth above 3 dB is: 0.90 GHz - 1.71 GHz, and the gain flatness is good, enabling the antenna to provide a stable signal within the frequency band, ensuring the stability of the signal quality and being unaffected by frequency changes.

[0043] 3) The coplanar waveguide navigation antenna is integrated with the automotive glass in an integrated design. Compared with the stacked design using probe feeding or the patch design using multi-port feeding, the present invention adopts an integrated design method of integrating functional glass and antenna devices, which not only saves the manufacturing cost but also avoids problems such as limited layout, crowded space, and unsightliness.

[0044] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present invention.

Claims

1. A broadband automotive navigation glass antenna, characterized in that, Comprising: Component 1, which serves as the ground plane of the antenna. A first groove is provided at the center of Component 1, and a second groove is provided between the first groove and the edge of Component 1. The second groove serves as the feed port. Component 2, which is a feed microstrip structure. The cross-section of Component 2 is Γ-shaped. One end of Component 2 is disposed in the second groove, and the other end of Component 2 is located in the first groove. Component 3, which is a patch structure for guiding current. The cross-section of Component 3 is Γ-shaped, and Component 3 is located in the first groove. One end of Component 3 is connected to the corner position of Component 2 located in the first groove. Component 4, which is a coupling part. The cross-section of Component 4 is Γ-shaped, and Component 4 is located in the first groove. Component 5, which is a grounding strip for increasing the path of current. The cross-section of Component 5 is U-shaped. Component 5 is located in the first groove, and the two ends of the U-shape of Component 5 are connected to the inner wall of the first groove. Component 6, which is a coupling stub. A number of Component 6 are provided, and several Component 6 are arranged outside Component 1. One end of Component 6 is connected to the outer wall of Component 1. Component 6 is used to adjust parameters to obtain the required broadband of the antenna. Component 1, Component 2, Component 3, Component 4, Component 5 and Component 6 are installed on the automotive glass.

2. The broadband automotive navigation glass antenna according to claim 1, wherein: Component 1 is a circular thin sheet. The first groove is provided at the center position of Component 1, and the cross-section of the first groove is rectangular. The four sides of the first groove are respectively the first side, the second side, the third side and the fourth side. The second groove is provided between the first side and the outer circumference of Component 1, and the second groove is a rectangular groove. The two ends of Component 5 are connected to the fourth side.

3. The broadband automotive navigation glass antenna according to claim 2, wherein: The first side is divided into two parts by the second groove. The two parts into which the first side is divided are respectively opposite to one side of Component 2 and one side of Component 3. A first boss is provided on the part of the first side opposite to Component 3. The first boss protrudes towards the center of the first groove, and the first boss is a rectangular boss.

4. The broadband automotive navigation glass antenna according to claim 1, wherein: The number of Component 6 is 8, and 8 Component 6 are grouped in pairs.

5. The broadband automotive navigation glass antenna according to claim 3, characterized in that: Component 3 includes Component 7 and Component 8. Both Component 7 and Component 8 are rectangular stubs, and the length of Component 8 is less than that of Component 7. Component 7 is disposed opposite to the first boss, and Component 8 is disposed opposite to the second side.

6. The broadband automotive navigation glass antenna according to claim 5, characterized in that: One end of Component 4 is disposed opposite to Component 8, and the other end of Component 4 extends towards the third side and is disposed opposite to the third side.

7. The broadband automotive navigation glass antenna according to claim 5, characterized in that: The end of Component 7 far from the first side forms a protruding step relative to the end of Component 2 far from the first side.

8. The broadband automotive navigation glass antenna according to claim 5, characterized in that: A gap is left between Component 4 and Component 8.

9. The broadband automotive navigation glass antenna according to claim 1, characterized in that: The impedance bandwidth of the antenna is: 1.03 GHz - 2.24 GHz, the axial ratio bandwidth is: 1.00 GHz - 1.77 GHz, and the gain bandwidth above 3 dB is: 0.9 GHz - 1.71 GHz.

10. The broadband automotive navigation glass antenna according to claim 1, characterized in that: The cross-section of Component 6 is rectangular.

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