ETC-compatible low-profile Beidou navigation integrated antenna

Abstract

The invention relates to an ETC-compatible low-profile Beidou navigation integrated antenna. The antenna comprises an antenna bottom plate; the partition plate is arranged above the antenna bottom plate; a dual-frequency antenna radiation body, wherein the dual-frequency antenna radiation body is arranged above the partition plate; and an ETC antenna steel sheet, wherein the ETC antenna steel sheet is arranged above the dual-frequency antenna radiator. According to the ETC-compatible low-profile Beidou navigation integrated antenna, the L1 + L5 coplanar design is adopted, so that the L1 + L5 is integrated on one printed board, and the height of the antenna can be reduced; through the L1 + L5 integrated design and the 5.9 G laminated design, the size and the area required by the antenna can be greatly reduced; according to the unit antenna, the current at the central point of the microstrip antenna is basically 0, the feed of the 5.9 G antenna is completed at the center, and the performance of L1 + L5 Beidou navigation is not affected.

Description

Technical Field

[0001] The present invention relates to the field of satellite communication equipment, and in particular to an ETC-compatible low-profile Beidou navigation integrated antenna. Background Art

[0002] At present, there are many types of antennas used in Beidou navigation and ETC on the market. As the Beidou satellite navigation system gradually matures, more and more users have begun to notice significant changes in the navigation experience, especially when using car navigation and ETC deductions together. If the ETC device and Beidou navigation device work independently, they will occupy space in the car, affect the appearance, and have low integration. In the existing technology, the stacked placement of antennas results in a high profile, which is inconvenient to install; the antenna size is large, which does not meet the growing demand for miniaturization in the market; the design method and materials used for the antenna result in a high total cost and a large weight. Summary of the invention

[0003] The present invention provides an ETC-compatible low-profile Beidou navigation integrated antenna, aiming to solve at least one of the technical problems existing in the prior art.

[0004] The technical solution of the present invention is an ETC-compatible low-profile Beidou navigation integrated antenna, which comprises: Antenna base plate; A partition, the partition being arranged above the antenna bottom plate; A dual-frequency antenna radiator, wherein the dual-frequency antenna radiator is arranged above the partition; An ETC antenna steel sheet, wherein the ETC antenna steel sheet is arranged above the dual-frequency antenna radiator.

[0005] Furthermore, an ETC antenna support frame for supporting the ETC antenna steel sheet is provided between the dual-frequency antenna radiator and the ETC antenna steel sheet.

[0006] Furthermore, a metallized via for feeding the ETC antenna steel sheet is provided at the geometric center of the dual-frequency antenna radiator, and also includes an ETC antenna feeding probe connected to the bottom of the ETC antenna steel sheet. The ETC antenna feeding probe passes through the ETC antenna support frame, the metallized via and the partition in sequence and is connected to the antenna base plate.

[0007] Furthermore, the dual-frequency antenna radiator includes an L1 antenna radiator arranged on the inner side and an L5 antenna radiator arranged on the outer side. The L1 antenna radiator comprises a first inner lobe, a second inner lobe, a third inner lobe and a fourth inner lobe which are arranged in sequence in a circumferential direction; The L5 antenna radiator includes a first inter-lobe region between the first inner lobe and the second inner lobe, a second inter-lobe region between the second inner lobe and the third inner lobe, a third inter-lobe region between the third inner lobe and the fourth inner lobe, and a fourth inter-lobe region between the fourth inner lobe and the first inner lobe, and other parts of the L5 antenna radiator are arranged around the outer side of the L1 antenna radiator.

[0008] Furthermore, the L1 antenna radiator and the L5 antenna radiator are also provided with partition grooves.

[0009] Furthermore, the dual-frequency antenna radiator further includes at least one L1 feeding probe and at least one L5 feeding probe. The L1 feeding probe is led out from the bottom of the L1 antenna radiator, passes through the partition and is connected to the antenna bottom plate; the L5 feeding probe is led out from the bottom of the L5 antenna radiator, passes through the partition and is connected to the antenna bottom plate.

[0010] Further, the L1 feeding probe includes a first L1 feeding probe and a second L1 feeding probe; The L5 feeding probe includes a first L5 feeding probe and a second L5 feeding probe, and the first L5 feeding probe and the second L5 feeding probe are respectively led out from two adjacent interlobal areas at the bottom of the L5 antenna radiator.

[0011] Furthermore, the frequency bands of the dual-frequency antenna radiator include L1 and L5 bands for Beidou navigation communication, the operating frequency of the L1 band is 1575 MHz, and the operating frequency of the L5 band is 1176 MHz.

[0012] Furthermore, the operating frequency band of the ETC antenna steel sheet is 5.9 GHZ.

[0013] Furthermore, the partition is made of plastic.

[0014] The beneficial effects of the present invention include: The ETC-compatible low-profile Beidou navigation integrated antenna adopts the coplanar design of L1+L5, so that L1+L5 are integrated into a printed circuit board, which can reduce the height of the antenna; through the L1+L5 integrated design and 5.9G stacking design, the size and area required for the antenna can be greatly reduced; the unit antenna uses the current at the center point of the microstrip antenna to be basically zero, and completes the feeding of the 5.9G antenna at the center, which does not affect the performance of the L1+L5 Beidou navigation.

[0015] In addition, additional aspects and advantages of the present invention will be given in part in the following description, and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an overall schematic diagram of an ETC-compatible low-profile Beidou navigation integrated antenna according to an embodiment of the present invention.

[0017] Figure 2 It is a top view of the ETC-compatible low-profile Beidou navigation integrated antenna according to an embodiment of the present invention.

[0018] Figure 3 This is a side view of the ETC-compatible low-profile Beidou navigation integrated antenna with a hidden partition and an ETC antenna support frame according to an embodiment of the present invention.

[0019] Figure 4 It is a schematic diagram of a dual-frequency antenna radiator in an ETC-compatible low-profile Beidou navigation integrated antenna according to an embodiment of the present invention.

[0020] Figure 5 It is a schematic diagram of an ETC antenna support frame in an ETC-compatible low-profile Beidou navigation integrated antenna according to an embodiment of the present invention.

[0021] Figure 6 It is a schematic diagram of the partition plate of the ETC-compatible low-profile Beidou navigation integrated antenna according to an embodiment of the present invention.

[0022] Figure 7 It is a simulation schematic diagram of the standing wave ratio of the ETC antenna steel sheet in the ETC compatible low-profile Beidou navigation integrated antenna according to an embodiment of the present invention.

[0023] Figure 8 It is a simulation schematic diagram of the axial gain of the ETC antenna steel sheet in the ETC compatible low-profile Beidou navigation integrated antenna according to an embodiment of the present invention.

[0024] Fig. 9 It is a simulation schematic diagram of the axial ratio of the ETC antenna steel sheet in the ETC compatible low-profile Beidou navigation integrated antenna according to an embodiment of the present invention.

[0025] Fig.10 It is a simulation schematic diagram of the L1 band standing wave ratio of the dual-frequency antenna radiator in the ETC-compatible low-profile Beidou navigation integrated antenna according to an embodiment of the present invention.

[0026] Fig.11 It is a simulation schematic diagram of the L1 band axial gain of the dual-frequency antenna radiator in the ETC-compatible low-profile Beidou navigation integrated antenna according to an embodiment of the present invention.

[0027] Fig.12 It is a simulation schematic diagram of the gain of the L1 band of the dual-frequency antenna radiator at a low elevation angle of 10 degrees in the ETC-compatible low-profile Beidou navigation integrated antenna according to an embodiment of the present invention.

[0028] Fig.13 It is a simulation schematic diagram of the axial ratio of the L1 frequency band of the dual-frequency antenna radiator in the ETC-compatible low-profile Beidou navigation integrated antenna according to an embodiment of the present invention.

[0029] Fig.14 It is a simulation schematic diagram of the L5 band standing wave ratio of the dual-frequency antenna radiator in the ETC-compatible low-profile Beidou navigation integrated antenna according to an embodiment of the present invention.

[0030] Fig.15 It is a simulation schematic diagram of the L5 band axial gain of the dual-frequency antenna radiator in the ETC-compatible low-profile Beidou navigation integrated antenna according to an embodiment of the present invention.

[0031] Fig.16 It is a simulation schematic diagram of the gain of the dual-frequency antenna radiator in the ETC-compatible low-profile Beidou navigation integrated antenna at a low elevation angle of 10 degrees in the L5 band according to an embodiment of the present invention.

[0032] Fig.17 It is a simulation schematic diagram of the axial ratio of the L5 frequency band of the dual-frequency antenna radiator in the ETC-compatible low-profile Beidou navigation integrated antenna according to an embodiment of the present invention.

[0033] Figure numerals, 100, antenna base plate; 200, partition; 300, dual-band antenna radiator; 310, metallized via; 320, L1 antenna radiator; 321, first inner lobe; 322, second inner lobe; 323, third inner lobe; 324, fourth inner lobe; 330, L5 antenna radiator; 331, first inter-lobe area; 332, second inter-lobe area; 333, third inter-lobe area; 334, fourth inter-lobe area; 340, partition groove; 350, first L1 feeding probe; 360, second L1 feeding probe; 370, first L5 feeding probe; 380, second L5 feeding probe; 400, ETC antenna steel sheet; 410, ETC antenna support frame; 420, ETC antenna feeding probe. DETAILED DESCRIPTION

[0034] The following will be combined with the embodiments and drawings to clearly and completely describe the concept, specific structure and technical effects of the present invention, so as to fully understand the purpose, scheme and effect of the present invention. It should be noted that the embodiments and features in the embodiments of this application can be combined with each other without conflict.

[0035] It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature, or it may be indirectly fixed or connected to the other feature. In addition, the descriptions of up, down, left, right, top, bottom, etc. used in the present invention are only relative to the relative positional relationship of the components of the present invention in the drawings.

[0036] In addition, unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art. The terms used in this specification are only for describing specific embodiments, not for limiting the present invention. The term "and / or" used herein includes any combination of one or more related listed items.

[0037] It should be understood that, although the terms first, second, third, etc. may be used to describe various elements in the present disclosure, these elements should not be limited to these terms. These terms are only used to distinguish elements of the same type from each other. For example, without departing from the scope of the present disclosure, the first element may also be referred to as the second element, and similarly, the second element may also be referred to as the first element.

[0038] Reference Figures 1 to 17 In some embodiments, the ETC-compatible low-profile Beidou navigation integrated antenna according to the present invention includes: Antenna base plate 100; A partition 200, wherein the partition 200 is disposed above the antenna base plate 100; A dual-frequency antenna radiator 300, wherein the dual-frequency antenna radiator 300 is disposed above the partition 200; The ETC antenna steel sheet 400 is disposed above the dual-band antenna radiator 300 .

[0039] The beneficial effects of the present invention include: The ETC-compatible low-profile Beidou navigation integrated antenna adopts the coplanar design of L1+L5, so that L1+L5 are integrated into a printed circuit board, which can reduce the height of the antenna; through the L1+L5 integrated design and 5.9G stacking design, the size and area required for the antenna can be greatly reduced; the unit antenna uses the current at the center point of the microstrip antenna to be basically zero, and completes the feeding of the 5.9G antenna at the center, which does not affect the performance of the L1+L5 Beidou navigation.

[0040] Further, refer to Figure 1 , Figure 2 and Figure 5 An ETC antenna support frame 410 for supporting the ETC antenna steel sheet 400 is also provided between the dual-frequency antenna radiator 300 and the ETC antenna steel sheet 400 .

[0041] Further, refer to Figure 3 and Figure 4The geometric center of the dual-frequency antenna radiator 300 is provided with a metallized via 310 for feeding the ETC antenna steel sheet 400, and also includes an ETC antenna feeding probe 420 connected to the bottom of the ETC antenna steel sheet 400. The ETC antenna feeding probe 420 passes through the ETC antenna support frame 410, the metallized via 310 and the partition 200 in sequence and is connected to the antenna base plate 100.

[0042] Specifically, the metallized via 310 is arranged at the central position of the dual-frequency antenna radiator 300. The unit antenna utilizes the characteristic that the current at the center point of the microstrip antenna is basically zero, and completes the feeding of the ETC antenna steel sheet 400 at the central position of the dual-frequency antenna radiator 300, thereby not affecting the performance of the L1+L5 Beidou navigation of the dual-frequency antenna radiator 300.

[0043] Among them, BeiDou-3 provides multiple frequency bands. The BeiDou-3 system provides multiple frequency bands such as L1 band, L2 band, L5 band and E1 band. These frequency bands can be used for different application scenarios and needs. The L1 band is mainly used for navigation and positioning in the civil and commercial fields, the L2 band is used for military and high-precision positioning, and the L5 band provides higher accuracy and robustness. The E1 band is a band established for compatibility with the European Galileo system. By providing multiple frequency bands, the BeiDou-3 system can meet the needs of different users and provide more accurate and reliable navigation and positioning services.

[0044] Further, refer to Figure 4 The dual-frequency antenna radiator 300 includes an L1 antenna radiator 320 disposed inside and an L5 antenna radiator 330 disposed outside. The L1 antenna radiator 320 includes a first inner lobe 321, a second inner lobe 322, a third inner lobe 323 and a fourth inner lobe 324 which are arranged in sequence in a circumferential direction; The L5 antenna radiator 330 includes a first inter-lobe region 331 arranged between the first inner lobe 321 and the second inner lobe 322, a second inter-lobe region 332 arranged between the second inner lobe 322 and the third inner lobe 323, a third inter-lobe region 333 arranged between the third inner lobe 323 and the fourth inner lobe 324, and a fourth inter-lobe region 334 arranged between the fourth inner lobe 324 and the first inner lobe 321, and other parts of the L5 antenna radiator 330 are arranged around the outer side of the L1 antenna radiator 320.

[0045] Further, refer to Figure 4 The L1 antenna radiator 320 and the L5 antenna radiator 330 are also provided with a partition groove 340.

[0046] Further, refer to Figure 3and Figure 4 , the dual-frequency antenna radiator 300 also includes at least one L1 feeding probe and at least one L5 feeding probe, The L1 feeding probe is led out from the bottom of the L1 antenna radiator 320 , passes through the partition 200 and is connected to the antenna base plate 100 ; the L5 feeding probe is led out from the bottom of the L5 antenna radiator 330 , passes through the partition 200 and is connected to the antenna base plate 100 .

[0047] Further, refer to Figure 3 and Figure 4 , the L1 feeding probe includes a first L1 feeding probe 350 and a second L1 feeding probe 360; The L5 feeding probe includes a first L5 feeding probe 370 and a second L5 feeding probe 380 . The first L5 feeding probe 370 and the second L5 feeding probe 380 are respectively led out from two adjacent interlobal areas at the bottom of the L5 antenna radiator 330 .

[0048] Specifically, in order to improve the axial ratio of the antenna, the ETC-compatible low-profile Beidou navigation integrated antenna described in the present invention adopts a dual-feed solution. The first L1 feeding probe 350 and the second L1 feeding probe 360 ​​are welded to the L1 antenna radiator 320 to achieve the performance of the antenna L1; the first L5 feeding probe 370 and the second L5 feeding probe 380 are welded to the L5 antenna radiator 330 to achieve the performance of the antenna L5; the ETC antenna feeding probe 420 is welded to the ETC antenna steel sheet 400 to achieve the performance of the antenna 5.9G.

[0049] Further, refer to Figure 3 and Figure 4 The frequency bands of the dual-frequency antenna radiator 300 include L1 and L5 bands for Beidou navigation communication. The operating frequency of the L1 band is 1575 MHz, and the operating frequency of the L5 band is 1176 MHz.

[0050] Further, refer to Figures 1 to 4 The operating frequency band of the ETC antenna steel sheet 400 is 5.9 GHZ.

[0051] Further, refer to Figure 1 and Figure 6 , the material of the partition 200 is plastic.

[0052] Specifically, the material of the partition 200 is plastic. Since the height of the foam has a 10% tolerance, the height affects the performance of the antenna. Using plastic can better control the height than using foam in the prior art, thereby improving the performance of the antenna.

[0053] Reference Figures 7 to 9, are simulation schematic diagrams of the standing wave ratio, axial gain and axial ratio of the ETC antenna steel sheet 400, where: exist Figure 7 , is the standing wave ratio (VSWR) of the ETC antenna, and the standing wave is below 2.0.

[0054] exist Figure 8 , which are the antenna radiation patterns at PHI=0° and PHI=90°, the maximum gain can reach 8dBi, the half-power beamwidth of the PHI=0° pattern section is 59.7°, and the half-power beamwidth of the PHI=90° pattern section is 64.6°.

[0055] exist Fig. 9 In the figure, the axial ratio of the antenna is between PHI=0° and PHI=90°, and the axial ratio reaches 2dB.

[0056] Reference Figures 10 to 13 , are simulation schematic diagrams of the standing wave ratio, axial gain, gain at a low elevation angle of 10 degrees and axial ratio of the dual-band antenna radiator 300 in the L1 frequency band, respectively, wherein, exist Fig.10 , is the standing wave ratio (VSWR) of the two feeding points of the L1 antenna, and the standing wave is below 2.5.

[0057] exist Fig.11 In the figure, the antenna radiation pattern is PHI=0° and PHI=90°, and the maximum gain can reach 4.7dBi.

[0058] exist Fig.12 In the figure, the cross-section of the antenna radiation pattern is Theta = 80° gain (10° gain at low elevation angle), and the minimum gain is -2.2dBi.

[0059] exist Fig.13 In the figure, the axial ratio of the antenna is between PHI=0° and PHI=90°, and the axial ratio reaches 0.4dB.

[0060] Reference Figures 14 to 17 , are simulation schematic diagrams of the standing wave ratio, axial gain, gain at a low elevation angle of 10 degrees and axial ratio of the dual-band antenna radiator 300 in the L5 frequency band, respectively, where: exist Fig.14 In the figure, it is the standing wave ratio (VSWR) of the two feeding points of the L5 antenna, and the standing wave is below 2.

[0061] exist Fig.15 In the figure, the antenna radiation pattern is PHI=0° and PHI=90°, and the maximum gain can reach 4.0dBi.

[0062] exist Fig.16 In the figure, the cross-section of the antenna radiation pattern is Theta = 80° gain, and the minimum gain is -4.5dBi.

[0063] exist Fig.17 In the figure, the axial ratio of the antenna is between PHI=0° and PHI=90°, and the axial ratio reaches 1.6dB.

[0064] The above is only a preferred embodiment of the present invention. The present invention is not limited to the above implementation. As long as the technical effect of the present invention is achieved by the same means, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the scope of protection of the present disclosure. All should belong to the protection scope of the present invention. Within the protection scope of the present invention, its technical scheme and / or implementation method can have various modifications and changes.

Claims

1. An ETC-compatible low-profile Beidou navigation integrated antenna, characterized in that: include: Antenna base plate (100); A partition plate (200), the partition plate (200) being arranged above the antenna bottom plate (100); A dual-frequency antenna radiator (300), the dual-frequency antenna radiator (300) being arranged above the partition (200); An ETC antenna steel sheet (400), wherein the ETC antenna steel sheet (400) is arranged above the dual-frequency antenna radiator (300).

2. The ETC-compatible low-profile Beidou navigation integrated antenna according to claim 1, characterized in that: An ETC antenna support frame (410) for supporting the ETC antenna steel sheet (400) is also provided between the dual-frequency antenna radiator (300) and the ETC antenna steel sheet (400).

3. The ETC-compatible low-profile Beidou navigation integrated antenna according to claim 1, characterized in that: The dual-frequency antenna radiator (300) is provided with a metallized via hole (310) for feeding the ETC antenna steel sheet (400) at its geometric center, and also includes an ETC antenna feeding probe (420) connected to the bottom of the ETC antenna steel sheet (400); the ETC antenna feeding probe (420) passes through the ETC antenna support frame (410), the metallized via hole (310) and the partition plate (200) in sequence and is connected to the antenna base plate (100).

4. The ETC-compatible low-profile Beidou navigation integrated antenna according to claim 1, characterized in that: The dual-frequency antenna radiator (300) comprises an L1 antenna radiator (320) arranged on the inner side and an L5 antenna radiator (330) arranged on the outer side. The L1 antenna radiator (320) comprises a first inner lobe (321), a second inner lobe (322), a third inner lobe (323) and a fourth inner lobe (324) which are sequentially arranged in a circumferential direction; The L5 antenna radiator (330) includes a first inter-lobe region (331) arranged between the first inner lobe (321) and the second inner lobe (322), a second inter-lobe region (332) arranged between the second inner lobe (322) and the third inner lobe (323), a third inter-lobe region (333) arranged between the third inner lobe (323) and the fourth inner lobe (324), and a fourth inter-lobe region (334) arranged between the fourth inner lobe (324) and the first inner lobe (321), and the other parts of the L5 antenna radiator (330) are arranged around the outer side of the L1 antenna radiator (320).

5. The ETC-compatible low-profile Beidou navigation integrated antenna according to claim 4, characterized in that: The L1 antenna radiator (320) and the L5 antenna radiator (330) are also provided with a partition groove (340).

6. The ETC-compatible low-profile Beidou navigation integrated antenna according to claim 4, characterized in that: The dual-frequency antenna radiator (300) further comprises at least one L1 feeding probe and at least one L5 feeding probe, After being led out from the bottom of the L1 antenna radiator (320), the L1 feeding probe passes through the partition (200) and is connected to the antenna bottom plate (100); after being led out from the bottom of the L5 antenna radiator (330), the L5 feeding probe passes through the partition (200) and is connected to the antenna bottom plate (100).

7. The ETC-compatible low-profile Beidou navigation integrated antenna according to claim 6, characterized in that: The L1 feeding probe comprises a first L1 feeding probe (350) and a second L1 feeding probe (360); The L5 feeding probe comprises a first L5 feeding probe (370) and a second L5 feeding probe (380), wherein the first L5 feeding probe (370) and the second L5 feeding probe (380) are respectively led out from two adjacent interlobal regions at the bottom of the L5 antenna radiator (330).

8. The ETC-compatible low-profile Beidou navigation integrated antenna according to claim 1, characterized in that: The frequency bands of the dual-frequency antenna radiator (300) include an L1 frequency band and an L5 frequency band used for Beidou navigation communication, the operating frequency of the L1 frequency band is 1575 MHz, and the operating frequency of the L5 frequency band is 1176 MHz.

9. The ETC-compatible low-profile Beidou navigation integrated antenna according to claim 1, characterized in that: The operating frequency band of the ETC antenna steel sheet (400) is 5.9 GHZ.

10. The ETC-compatible low-profile Beidou navigation integrated antenna according to claim 1, characterized in that: The material of the partition (200) is plastic.

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