Dual-frequency navigation glass antenna and communication system

Abstract

The invention provides a dual-frequency navigation glass antenna and a communication system, and the antenna comprises a composite glass substrate which comprises a top substrate, a bottom substrate, and a bonding layer; a transmission channel is arranged on the grounding plane; the micro-strip feeder line is arranged corresponding to the transmission channel; the included angle between the length direction of the radiation mechanism and the first direction is within a preset range, the radiation mechanism comprises two low-frequency patches and two high-frequency patches, the high-frequency patches and the low-frequency patches are arranged in a staggered mode and are arranged at intervals in a central symmetry structure, parallel groove sections and orthogonal groove sections are arranged on the low-frequency patches, and the parallel groove sections and the orthogonal groove sections are perpendicular to each other. The extending direction of the adjusting groove is parallel to the extending direction of the orthogonal groove section. According to the invention, the defects that a traditional navigation antenna is narrow in bandwidth, large in gain fluctuation and weak in partial frequency band signal receiving are overcome, and collaborative optimization of dual-frequency performance, integration reliability and signal receiving quality is integrally realized.

Description

Technical Field

[0001] This invention relates to the field of communication technology, specifically to a dual-frequency navigation glass antenna and communication system. Background Technology

[0002] In the field of automotive wireless communication and navigation, satellite navigation antennas, as core receiving components, directly affect the navigation accuracy and communication stability of the entire vehicle through their performance and installation method. Traditionally, shark fin antennas mounted externally are widely used in automotive satellite navigation. However, these external antennas are susceptible to corrosion and impact from external environmental factors such as rain, sandstorms, and collisions. This not only reduces the antenna's lifespan and operational stability but also disrupts the overall aesthetics of the vehicle, failing to meet the demands of some users for vehicle aesthetics. Simultaneously, with the increasing intelligence of automobiles, the number of wireless communication antennas required in vehicles is increasing annually. When multiple antennas are densely arranged within the limited space of the vehicle body, mutual coupling interference between antennas is highly likely to occur, leading to a decrease in the signal receiving sensitivity and weakened anti-interference capability of each wireless communication system, thus affecting the overall performance of navigation, positioning, and other communication functions. Furthermore, these multiple independent antennas require separate mounting structures, connecting cables, and connectors, increasing not only the overall component cost of the vehicle but also complicating the antenna installation process, extending the vehicle production cycle, and increasing assembly difficulty and subsequent maintenance costs.

[0003] To address some of the shortcomings of external antennas, traditional patch-type satellite navigation antennas have gradually gained application. However, they inherently suffer from a narrow frequency band coverage. With the increasing demands for autonomous driving and high-precision positioning and navigation, higher requirements are being placed on the frequency band coverage and positioning accuracy of satellite navigation antennas. Traditional patch antennas, unable to achieve wide-band coverage, struggle to meet the needs of high-precision navigation and positioning functions, thus limiting their application in high-end intelligent vehicles.

[0004] Currently, to broaden antenna bandwidth and achieve multi-band operation, the industry often adopts multi-layer patch structure antenna design. While this structure can improve frequency band coverage to some extent, it also brings new technical challenges: the multi-layer patch structure leads to a significant increase in the antenna's profile height, making it difficult to adapt to the miniaturization and flattening installation requirements of car bodies and interiors; moreover, multi-layer patch antennas usually require coaxial feeding, which necessitates drilling holes in the antenna dielectric substrate. If such antennas are installed on car windows, the drilling operation will damage the structural integrity and mechanical stability of the glass, increasing the risk of glass cracking and breakage, and affecting the overall vehicle safety. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the problems of narrow bandwidth, large gain fluctuation and weak signal reception in some frequency bands in the prior art, and to provide a dual-frequency navigation glass antenna and communication system.

[0006] To address the aforementioned technical problems, this invention provides a dual-frequency navigation glass antenna, comprising: a composite glass substrate, the composite glass substrate including a top substrate, a bottom substrate, and an adhesive layer connecting the top substrate and the bottom substrate; a ground plane, the ground plane being disposed between the adhesive layer and the bottom substrate, and having a transmission channel extending through its thickness direction therethrough; a microstrip feed line, the microstrip feed line being disposed on the outer surface of the bottom substrate and corresponding to the transmission channel; and a radiating mechanism, the radiating mechanism being disposed on the outer surface of the top substrate, and the length direction of the radiating mechanism being perpendicular to the first... The included angle between the directions is within a preset range. The radiation mechanism includes two low-frequency patches and two high-frequency patches. The high-frequency patches and the low-frequency patches are arranged alternately and are arranged in a centrally symmetrical structure with the center of the top substrate as the symmetry point in the plane where the top substrate is located. Each low-frequency patch is provided with parallel grooves and orthogonal grooves that are perpendicular to each other in the plane where the top substrate is located. The parallel grooves extend along the length direction of the low-frequency patches. Each high-frequency patch is provided with an adjustment groove. The extension direction of the adjustment groove is parallel to the extension direction of the orthogonal groove.

[0007] In one embodiment of the present invention, the preset range is 30~40°.

[0008] In one embodiment of the present invention, the orthogonal slot segment extends inward from the side of the low-frequency patch near the center of the top substrate in the width direction thereof, the length of the orthogonal slot segment is greater than the length of the parallel slot segment, and the width of the orthogonal slot segment is greater than the width of the parallel slot segment.

[0009] In one embodiment of the present invention, in the length direction of the orthogonal groove segment, the parallel groove segment is disposed biased towards the extended end of the orthogonal groove segment, and the parallel groove segment is arranged symmetrically on both sides in the width direction of the corresponding orthogonal groove segment.

[0010] In one embodiment of the present invention, the radiation mechanism further includes two extension patches, which are respectively connected to the side of the low-frequency patch near the edge of the top substrate in the width direction. The extension patches extend from the side of the low-frequency patch near the center of the top substrate to the other side in the length direction. The length of the extension patch is less than the length of the low-frequency patch, and the width of the extension patch is less than the width of the low-frequency patch.

[0011] In one embodiment of the present invention, the adjustment groove extends inward from the side of the high-frequency patch near the center of the top substrate in the width direction, the extension length of the adjustment groove is less than the length of the orthogonal groove segment, and the width of the adjustment groove is greater than the width of the orthogonal groove segment.

[0012] In one embodiment of the present invention, in the length direction of the radiation mechanism, the distance between the adjustment groove and the center of the top substrate is less than the distance between the orthogonal groove segment and the center of the top substrate.

[0013] In one embodiment of the present invention, the microstrip feed line extends along a second direction, and its linewidth at the end near the center of the bottom substrate is greater than its linewidth at the end away from the center of the bottom substrate.

[0014] In one embodiment of the present invention, the transmission channel is disposed in the middle of the ground plane and is configured as a rectangular slot extending along a first direction, wherein the extension length of the transmission channel is 1 / 4 wavelength corresponding to its center resonant frequency.

[0015] The present invention also provides a dual-frequency navigation communication system, which includes the dual-frequency navigation glass antenna described above.

[0016] The technical solution of the present invention has the following advantages compared with the prior art: The dual-frequency navigation glass antenna and communication system of this invention uses a composite glass substrate as a carrier. The ground plane is integrated between the adhesive layer inside the substrate and the bottom substrate, and the microstrip feed line is integrated on the outer surface of the bottom substrate. The radiation mechanism is located on the outer surface of the top substrate. This eliminates the need for additional vehicle installation space, offering both concealment and aesthetics. Simultaneously, the sandwich structure of the composite glass substrate provides reliable protection for the internal feed structure, resisting the effects of vibration, rain, snow, ultraviolet radiation, and other external environmental factors, significantly improving the antenna's lifespan and operational stability under complex vehicle conditions. By symmetrically arranging two low-frequency patches and two high-frequency patches around the center of the top substrate, and combining this with parallel and orthogonal slots perpendicularly arranged on the low-frequency patches, and adjustment slots on the high-frequency patches parallel to the extension direction of the orthogonal slots, resonant modes satisfying orthogonality and equal amplitude can be excited in the high and low frequency target bands respectively, achieving stable circular polarization radiation. This effectively improves the anti-interference capability and positioning accuracy of navigation signal reception, solving the problems of poor adaptability of traditional single-frequency antennas and unstable polarization performance of multi-frequency antennas.

[0017] Meanwhile, the transmission channel on the ground plane is set up in correspondence with the microstrip feed line, which can effectively penetrate the electromagnetic shielding of the ground plane, build an efficient energy coupling path, and ensure the accurate transmission of the feed energy to the radiation mechanism. The symmetrical layout of the radiation mechanism and the coordinated design of the slot structure can effectively introduce degenerate modes, broaden the effective working bandwidth of the high and low frequency bands, improve the gain consistency of the antenna in the target frequency band, and avoid signal reception blind spots. As a result, it can be effectively adapted to high-precision navigation scenarios, solve the defects of traditional navigation antennas such as narrow bandwidth, large gain fluctuation, and weak signal reception in some frequency bands, and achieve overall synergistic optimization of dual-frequency performance, integrated reliability and signal reception quality. Attached Figure Description

[0018] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0019] Figure 1 This is an exploded view of the dual-frequency navigation glass antenna in a preferred embodiment of the present invention; Figure 2 This is a schematic diagram of the layer structure of the composite glass substrate in the dual-frequency navigation glass antenna of the present invention in a preferred embodiment; Figure 3 This is a schematic diagram of the radiation mechanism and top substrate of the dual-frequency navigation glass antenna in a preferred embodiment of the present invention; Figure 4 This is a simulation diagram of the relationship between the reflection coefficient and frequency of the dual-frequency navigation glass antenna in a preferred embodiment of the present invention; Figure 5 This is a graph showing the relationship between the axial ratio and frequency of the dual-frequency navigation glass antenna in a preferred embodiment of the present invention. Figure 6 This is a two-dimensional radiation pattern of the dual-frequency navigation glass antenna at 1.268 GHz in a preferred embodiment of the present invention; Figure 7 This is a two-dimensional radiation pattern of the dual-frequency navigation glass antenna at 1.575 GHz in a preferred embodiment of the present invention.

[0020] Explanation of reference numerals in the accompanying drawings: 100, composite glass substrate; 110, top substrate; 120, adhesive layer; 130, bottom substrate; 200, ground plane; 210, transmission channel; 300, microstrip feed line; 400, radiation mechanism; 410, low-frequency patch; 411, parallel slot segment; 412, orthogonal slot segment; 420, high-frequency patch; 421, adjustment slot; 430, extension patch; X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0022] Example 1: See Figures 1 to 3 As shown, this embodiment provides a dual-band navigation glass antenna, comprising: a composite glass substrate 100, the composite glass substrate 100 including a top substrate 110, a bottom substrate 130, and an adhesive layer 120 connecting the top substrate 110 and the bottom substrate 130; a ground plane 200 disposed between the adhesive layer 120 and the bottom substrate 130, and having a transmission channel 210 extending through its thickness direction thereon; a microstrip feed line 300 disposed on the outer surface of the bottom substrate 130 and corresponding to the transmission channel 210; and a radiating mechanism 400 disposed on the outer surface of the top substrate 110, the length direction of the radiating mechanism 400 being perpendicular to the thickness direction of the top substrate 110. The included angle between two directions X is within a preset range. The radiation mechanism 400 includes two low-frequency patches 410 and two high-frequency patches 420. The high-frequency patches 420 and the low-frequency patches 410 are arranged alternately and are arranged in a centrally symmetrical structure with the center of the top substrate 110 as the symmetry point in the plane where the top substrate 110 is located. Each low-frequency patch 410 is provided with a parallel groove segment 411 and an orthogonal groove segment 412 that are perpendicular to each other in the plane where the top substrate 110 is located. The parallel groove segment 411 extends along the length direction of the low-frequency patch 410. Each high-frequency patch 420 is provided with an adjustment groove 421. The extension direction of the adjustment groove 421 is parallel to the extension direction of the orthogonal groove segment 412.

[0023] It should be noted that, for ease of description, this embodiment will... Figure 1 The length direction of the composite glass substrate 100 shown is defined as the first direction X, the width direction of the composite glass substrate 100 is defined as the second direction Y, and the thickness direction of the composite glass substrate 100 is defined as the third direction Z. The first direction X, the second direction Y, and the third direction Z are arranged perpendicularly to each other in pairs, and the first direction X and the second direction Y are located in the same plane.

[0024] The composite glass substrate 100 serves as the carrier of the antenna. It consists of a top substrate 110, a bottom substrate 130, and an adhesive layer 120, forming a sandwich structure. This structure provides stable mounting support for the ground plane 200, the microstrip feed line 300, and the radiating mechanism 400. The sandwich design also allows the ground plane 200 to be hidden inside the substrate, enabling integrated antenna design with applications such as automotive glass. This design combines concealment with structural strength and protects the internal feed structure from external vibrations, rain, snow, and ultraviolet radiation, ensuring the antenna's lifespan under complex operating conditions.

[0025] Specifically, in this embodiment, the top substrate 110 and the bottom substrate 130 have a glass dielectric constant of 7, a loss tangent of 0.01, and a thickness of 2.1 mm. These parameters ensure the electromagnetic signal transmission efficiency of the antenna within the target dual-band, reduce the impact of dielectric loss on radiation performance, and provide a stable and reliable mounting platform for the ground plane 200, microstrip feed line 300, and radiating mechanism 400, meeting the requirements for substrate structural strength and weather resistance in automotive applications. The adhesive layer 120 is preferably a PVB adhesive layer with a dielectric constant of 2.96, a loss tangent of 0.06, and a thickness of 0.76 mm. This PVB adhesive layer not only achieves a firm bond between the top substrate 110 and the bottom substrate 130, forming an integrated sandwich glass structure, but its dielectric parameters also match the electromagnetic characteristics of the glass substrate, reducing signal reflection between different dielectric layers, ensuring the energy coupling stability between the feed system and the radiating mechanism 400, and possessing good buffering and protection performance, improving the antenna's reliability under complex operating conditions such as vibration and shock.

[0026] In this embodiment, the ground plane 200 is disposed between the adhesive layer 120 and the bottom substrate 130. On the one hand, it can shield the electromagnetic interference on the bottom substrate 130 side and avoid the influence of external noise on the feed signal. On the other hand, the transmission channel 210 that runs through the thickness direction on it can break through the electromagnetic shielding effect of the ground plane 200 and build an energy transmission path between the microstrip feed line 300 and the top radiation mechanism 400, ensuring that the feed energy can be accurately coupled to the radiation mechanism 400 to excite resonance.

[0027] Furthermore, the transmission channel 210 is disposed in the middle of the ground plane 200, and is configured as a rectangular slot extending along the first direction X. The extension length of the transmission channel 210 is 1 / 4 wavelength corresponding to its center resonant frequency of 1.4 GHz. This design enables the transmission channel 210 to generate a resonant effect at a frequency of 1.4 GHz, thereby overcoming the electromagnetic shielding effect of the ground plane 200 and constructing an efficient energy coupling path between the microstrip feed line 300 and the top radiating mechanism 400. This ensures that the radio frequency energy transmitted by the microstrip feed line 300 can be accurately and with low loss coupled to the radiating mechanism 400, thereby exciting the high and low frequency patches to generate stable resonant modes, providing a key energy transmission guarantee for the antenna to achieve dual-frequency circular polarization radiation.

[0028] In this embodiment, the microstrip feed line 300 is disposed on the outer surface of the bottom substrate 130 and precisely corresponds to the transmission channel 210. Its core function is to transmit externally input radio frequency signals and couple electromagnetic energy to the top radiation mechanism 400 through the transmission channel 210. It is the core component for antenna feeding. The impedance matching can be further optimized by the linewidth gradient design to improve energy transmission efficiency and reduce signal loss.

[0029] Furthermore, in this embodiment, the microstrip feed line 300 is configured as a tapered microstrip feed line, extending along the second direction Y, with its linewidth at the end near the center of the bottom substrate 130 being greater than its linewidth at the end away from the center of the bottom substrate 130. This tapered linewidth design optimizes the impedance matching performance of the feed line, reduces the reflection loss of RF signals during transmission, and forms a precise spatial correspondence with the rectangular transmission channel 210 extending along the first direction X in the middle of the ground plane 200. This ensures that the electromagnetic energy transmitted by the feed line can be efficiently converged and coupled to the top radiation mechanism 400 through the transmission channel 210, providing a continuous and stable energy input for the stable excitation of high and low frequency patch resonant modes.

[0030] In this embodiment, the radiation mechanism 400, as the core functional component of the antenna for signal reception and radiation, is disposed on the outer surface of the top substrate 110 to maximize the navigation signal in the contact space. Its preset angle with the first direction X optimizes the current distribution of the patch and adapts to the circular polarization radiation requirements. The two low-frequency patches 410 and two high-frequency patches 420 are arranged in a centrally symmetrical and staggered structure with the center of the top substrate 110 as the symmetry point, ensuring the symmetry of the current distribution between the high and low frequency patches while avoiding electromagnetic crosstalk between the high and low frequency bands. The parallel slots 411 and orthogonal slots 412 perpendicular to each other on the low-frequency patch 410 can effectively introduce degenerate modes, broaden the low-frequency operating bandwidth, and construct orthogonal resonant modes that meet the circular polarization requirements. The adjustment slots 421 and orthogonal slots 412 on the high-frequency patch 420 extend in parallel directions, adapting to the current path distribution in the high-frequency band, ensuring stable circular polarization performance in the high-frequency band, and achieving efficient reception of dual-frequency navigation signals.

[0031] Specifically, see Figure 3 As shown, the preset range in this embodiment is 35°. In different implementations, the preset range can be configured to 30~40° according to actual usage requirements. This angular range limitation can adapt to the centrally symmetrical staggered arrangement of high and low frequency patches in the radiation mechanism 400, optimize the current distribution state on the patch surface, and enable the high and low frequency patches to form resonance modes that meet the requirements of orthogonality, equal amplitude, and 90° phase difference in the target frequency band. At the same time, it effectively avoids electromagnetic crosstalk between high and low frequency bands, ensures the stability of the dual-frequency circular polarization radiation performance of the antenna, and lays a structural foundation for improving the anti-interference capability and positioning accuracy of navigation signal reception.

[0032] In this embodiment, the orthogonal slot segment 412 extends inward from the side of the low-frequency patch 410 closest to the center of the top substrate 110 in the width direction. The length of the orthogonal slot segment 412 is greater than the length of the parallel slot segment 411, and the width of the orthogonal slot segment 412 is greater than the width of the parallel slot segment 411. This differentiated size design enables the orthogonal slot segment 412 to become the dominant current flow path on the surface of the low-frequency patch 410, forming a primary and secondary current distribution structure with the parallel slot segment 411. This allows for precise control of the current amplitude and phase difference in the two orthogonal directions, ensuring that the orthogonality, equal amplitude, and 90° phase difference required for circularly polarized radiation are met. Simultaneously, it effectively introduces degenerate modes to broaden the low-frequency operating bandwidth, guaranteeing the signal reception gain and stability of the antenna within the low-frequency target band.

[0033] Furthermore, along the length of the orthogonal slot segment 412, the parallel slot segment 411 is positioned towards the extended end of the orthogonal slot segment 412, and the parallel slot segment 411 is symmetrically arranged on both sides of its corresponding orthogonal slot segment 412 in the width direction. This layout design can further optimize the current path on the surface of the low-frequency patch 410, allowing the current to form a stable shunt distribution in the intersection area of ​​the orthogonal slot segment 412 and the parallel slot segment 411. This ensures the stability of the phase difference of the current in the orthogonal direction and avoids the bias distortion of the current distribution through symmetrical arrangement, thereby enhancing the excitation effect of degenerate modes, ensuring the purity and bandwidth stability of circularly polarized radiation in the low-frequency band, and providing reliable structural support for the antenna to achieve efficient signal reception in the low-frequency target band.

[0034] Correspondingly, the adjustment slot 421 extends inward from the side of the high-frequency patch 420 closest to the center of the top substrate 110 in the width direction. The extension length of the adjustment slot 421 is less than the length of the orthogonal slot segment 412, and the width of the adjustment slot 421 is greater than the width of the orthogonal slot segment 412. This structural design can adapt to the signal characteristics of the high-frequency band. By limiting the extension length of the adjustment slot 421, interference with the edge effect of the high-frequency patch 420 is avoided. At the same time, the wider slot structure optimizes the flow path of high-frequency current, forming a complementary size and function with the orthogonal slot segment 412 of the low-frequency patch 410. This ensures that the high-frequency patch 420 forms a resonant mode that meets the circular polarization requirements in the target frequency band, effectively improving the gain and anti-interference capability of high-frequency signal reception, and achieving synergistic optimization of high- and low-frequency dual-band performance.

[0035] Furthermore, along the length of the radiating mechanism 400, the distance from the adjustment slot 421 to the center of the top substrate 110 is less than the distance from the orthogonal slot segment 412 to the center of the top substrate 110. This layout design allows the adjustment slot 421 of the high-frequency patch 420 and the orthogonal slot segment 412 of the low-frequency patch 410 to form an orderly layered arrangement in space. This avoids direct electromagnetic coupling interference between the high-frequency and low-frequency slot structures, and allows them to correspond to the signal transmission characteristics of the high-frequency and low-frequency target frequency bands respectively, ensuring the independent and stable excitation of the high-frequency resonant mode. At the same time, in conjunction with the centrally symmetrical layout of the radiating mechanism 400, it further optimizes the isolation and gain consistency of dual-band signal reception, ensuring that the antenna has excellent circular polarization radiation performance in both high-frequency and low-frequency bands.

[0036] Furthermore, the radiation mechanism 400 described in this embodiment also includes two extension patches 430. The two extension patches 430 are respectively connected to the side of the low-frequency patch 410 near the edge of the top substrate 110 in the width direction. They extend from the side of the low-frequency patch 410 near the center of the top substrate 110 to the other side in the length direction. The length of the extension patch 430 is less than the length of the low-frequency patch 410, and the width of the extension patch 430 is less than the width of the low-frequency patch 410. This extension structure can further extend the flow path of the low-frequency current without destroying the main resonant characteristics of the low-frequency patch 410. By fine-tuning the current transmission delay, the phase difference of the current in the orthogonal directions is optimized, making it closer to the 90° required for circular polarization radiation, thus improving the circular polarization purity in the low-frequency band. At the same time, the smaller size design avoids electromagnetic interference with the high-frequency patch 420. Combined with the limitation of the extension direction, it can further broaden the low-frequency operating bandwidth, optimize the radiation pattern, reduce the signal reception blind zone in automotive scenarios, and ensure the stability and gain consistency of low-frequency signal reception.

[0037] See Figure 4 and Figure 5 As shown, from Figure 4 It can be seen from this that the impedance bandwidth of this dual-frequency navigation glass antenna is: 1.16GHz-1.29GHz, 1.52GHz-1.62GHz. From Figure 5 As can be seen, the axial bandwidth of this dual-band navigation glass antenna is 1.25GHz-1.28GHz and 1.54GHz-1.59GHz. Therefore, this dual-band navigation glass antenna possesses dual-band characteristics, covering both the B3 (1.268GHz) and L1 (1.575GHz) navigation frequency bands. Based on this, Figure 6 and Figure 7 The figures show the two-dimensional radiation patterns of the dual-frequency navigation glass antenna described in this embodiment at 1.268 GHz and 1.575 GHz, respectively. As can be seen from the figures, the present invention has stable radiation characteristics, with a gain of 1.59 dBic at low frequency and a gain of 1.64 dBic at high frequency.

[0038] Example 2: This example provides a dual-frequency navigation communication system, which includes the dual-frequency navigation glass antenna described in Example 1.

[0039] In summary, the dual-frequency navigation glass antenna and communication system of the present invention uses a composite glass substrate 100 as a carrier, integrates the ground plane 200 between the adhesive layer 120 inside the substrate and the bottom substrate 130, and sets the radiation mechanism 400 on the outer surface of the top substrate 110. It does not require additional vehicle installation space, and has both concealment and aesthetics. At the same time, the sandwich structure of the composite glass substrate 100 can provide reliable protection for the internal feeding structure, resist the influence of external environment such as vibration, rain, snow, and ultraviolet rays, and greatly improve the service life and working stability of the antenna under complex vehicle conditions. By arranging two low-frequency patches 410 and two high-frequency patches 420 in a centrally symmetrical and staggered manner with the center of the top substrate 110 as the symmetrical point, and in conjunction with the parallel slots 411 and orthogonal slots 412 perpendicularly arranged on the low-frequency patches 410, and the adjustment slots 421 of the high-frequency patches 420 parallel to the extension direction of the orthogonal slots 412, resonant modes that satisfy orthogonality and equal amplitude can be excited in the high and low frequency target bands respectively, achieving stable circular polarization radiation, effectively improving the anti-interference capability and positioning accuracy of navigation signal reception, and solving the problems of poor adaptability of traditional single-frequency antennas and unstable polarization performance of multi-frequency antennas.

[0040] Meanwhile, the transmission channel 210 on the ground plane 200 is correspondingly set with the microstrip feed line 300, which can effectively penetrate the electromagnetic shielding of the ground plane 200, construct an efficient energy coupling path, and ensure the accurate transmission of the feed energy to the radiation mechanism 400. The symmetrical layout of the radiation mechanism 400 and the coordinated design of the slot structure can effectively introduce degenerate modes, broaden the effective working bandwidth of the high and low frequency bands, improve the gain consistency of the antenna in the target frequency band, and avoid signal reception blind spots. Thus, it can effectively adapt to high-precision navigation scenarios, solve the defects of traditional navigation antennas such as narrow bandwidth, large gain fluctuation, and weak signal reception in some frequency bands, and achieve overall synergistic optimization of dual-frequency performance, integrated reliability and signal reception quality.

[0041] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A dual frequency navigation glass antenna, characterized by: The application relates to a double-frequency navigation glass antenna. The double-frequency navigation glass antenna comprises a composite glass substrate, a ground plane, a microstrip feed line and a radiation mechanism. The composite glass substrate comprises a top substrate, a bottom substrate and an adhesive layer connected between the top substrate and the bottom substrate. The ground plane is arranged between the adhesive layer and the bottom substrate and is provided with a transmission channel penetrating through the thickness direction of the ground plane. The microstrip feed line is arranged on the outer surface of the bottom substrate and corresponds to the transmission channel.

2. The dual frequency navigation glass antenna according to claim 1, characterized in that: The radiation mechanism is arranged on the outer surface of the top substrate, and the included angle between the length direction of the radiation mechanism and the first direction is within a preset range.

3. The dual frequency navigation glass antenna according to claim 1, characterized in that: The radiation mechanism comprises two low-frequency patches and two high-frequency patches.

4. The dual frequency navigation glass antenna according to claim 3, characterized in that: The high-frequency patches and the low-frequency patches are staggered and arranged in a central symmetric structure with the center of the top substrate as the symmetric point in the plane of the top substrate.

5. The dual frequency navigation glass antenna according to claim 1, characterized in that: Any low-frequency patch is provided with a parallel slot section and a perpendicular slot section arranged perpendicularly to each other in the plane of the top substrate.

6. The dual frequency navigation glass antenna according to claim 1, characterized in that: The parallel slot section extends along the length direction of the low-frequency patch.

7. The dual frequency navigation glass antenna according to claim 6, characterized in that: Any high-frequency patch is provided with an adjusting slot.

8. The dual frequency navigation glass antenna according to claim 1, characterized in that: The extending direction of the adjusting slot is parallel to the extending direction of the perpendicular slot section.

9. The dual frequency navigation glass antenna according to claim 1, characterized in that: The preset range is 30-40 DEG.

10. A dual frequency navigation communication system characterized by: The perpendicular slot section extends from one side of the low-frequency patch close to the center of the top substrate to the inside. The length of the perpendicular slot section is greater than the length of the parallel slot section. The width of the perpendicular slot section is greater than the width of the parallel slot section. In the length direction of the perpendicular slot section, the parallel slot section is arranged on the side deviated from the extending end of the perpendicular slot section and is arranged symmetrically on both sides of the width direction of the corresponding perpendicular slot section. The radiation mechanism further comprises two extension patches. The two extension patches are respectively connected to one side of the low-frequency patch close to the edge of the top substrate and extend from one side of the low-frequency patch close to the center of the top substrate to the other side of the length direction. The length of the extension patch is less than the length of the low-frequency patch. The width of the extension patch is less than the width of the low-frequency patch. The adjusting slot extends from one side of the high-frequency patch close to the center of the top substrate to the inside. The extending length of the adjusting slot is less than the length of the perpendicular slot section. The width of the adjusting slot is greater than the width of the perpendicular slot section. In the length direction of the radiation mechanism, the distance between the adjusting slot and the center of the top substrate is less than the distance between the perpendicular slot section and the center of the top substrate. The microstrip feed line extends along the second direction, and the line width of one end close to the center of the bottom substrate is greater than the line width of the other end away from the center of the bottom substrate. The transmission channel is arranged in the middle of the ground plane and is configured as a rectangular slot extending along the first direction. The extending length of the transmission channel is 1 / 4 wavelength corresponding to the center resonant frequency. The double-frequency navigation glass antenna comprises any one of claims 1-9.

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