A broadband omnidirectional satellite navigation antenna with wide beam performance

Abstract

The invention discloses a broadband omnidirectional satellite navigation antenna with wide beam performance, comprising a slot-loaded vortex groove circular radiation patch, a supporting dielectric plate, a supporting dielectric, a vortex groove floor, a short-circuit probe and a feeding probe, wherein the slot-loaded vortex groove circular radiation patch comprises a circular patch, an annular slot and an annular patch with etched vortex grooves arranged in sequence from the center to the edge, the supporting dielectric plate comprises a dielectric substrate and 6 circular grooves, the supporting dielectric comprises a cylindrical dielectric and 6 circular apertures; the vortex groove floor comprises a central feeding protection hole and an annular floor with etched vortex grooves; the short-circuit probes are 6 and the feeding probe is 1. Due to the proposed design of the annular patch with etched vortex grooves, the annular floor with etched vortex grooves and the short-circuit probe, the antenna achieves a good wide beam effect, and is very suitable for satellite navigation antennas with high positioning accuracy requirements.

Description

Technical Field

[0001] The invention relates to the field of omnidirectional circularly polarized antennas, and in particular to a broadband omnidirectional satellite navigation antenna with wide beam performance. Background Art

[0002] The global satellite navigation system is a satellite system that covers the entire world and can autonomously locate the user in space. It uses navigation satellites to perform timing and distance measurement to determine the user's exact location. Currently, the global satellite navigation system includes the United States' Global Positioning System (GPS), Russia's GLONASS, the European Union's Galileo Satellite Navigation System (GALILEO) and China's Beidou Satellite Navigation System (BDS). With its advantages such as accurate positioning and fast speed, the global satellite navigation system is often used for measurement, navigation, positioning, monitoring, management, rescue, etc.

[0003] Since a single navigation system has blind spots in global positioning, it is impossible to achieve real-time positioning. As an important part of the satellite navigation system, the broadband satellite navigation antenna can cover multiple satellite navigation system frequency bands, effectively improve positioning accuracy, and achieve real-time positioning.

[0004] In satellite navigation systems, the signal reception range of the antenna affects the positioning accuracy. Since the positions of most communication devices are not fixed, if the antenna's radiation beam is narrow, it will not be able to continuously communicate with the moving device and accurately transmit information. Increasing the gain of the antenna at low elevation angles is also beneficial for the receiving antenna to capture weak signals. In order to improve the positioning accuracy of the satellite navigation system, widening the beam width is of great significance. At present, the design of wide-beam antennas is usually considered from two aspects: widening the antenna axial ratio beam width and widening the antenna half-power beam width.

[0005] At present, the research results of broadband omnidirectional satellite navigation antennas with wide beam performance are not very ideal. There are more research results with wide beams in narrow frequency bands, while the axial ratio beam width and half-power beam width of research results in wide frequency bands are generally relatively narrow, and ideal performance has not been achieved. Summary of the invention

[0006] In order to solve the problem that many performance indicators in a wide frequency band cannot be obtained at the same time, the present invention discloses a broadband omnidirectional satellite navigation antenna with wide beam performance, comprising: a slot-loaded vortex groove circular radiation patch, a supporting dielectric plate, a supporting dielectric, a vortex groove floor, a short-circuit probe and a feeding probe;

[0007] The gap-loaded vortex groove circular radiation patch includes a circular patch, an annular gap and an annular patch with etched vortex grooves arranged in sequence from the center to the edge; the feeding probe is connected to the circular patch, and the outer periphery of the circular patch is an annular gap to achieve same-layer capacitive coupling feeding; the number of vortex grooves in the annular patch with etched vortex grooves is 6; the interval of vortex grooves in the annular patch with etched vortex grooves is 60°; the supporting medium plate includes a dielectric substrate and 6 circular grooves; the supporting medium includes a cylindrical medium and 6 circular apertures;

[0008] The vortex groove floor comprises a central power feeding protection hole and an annular floor with etched vortex grooves; the number of vortex grooves in the annular floor with etched vortex grooves is 6; the interval of the vortex grooves in the annular floor with etched vortex grooves is 60°; the annular patch of the etched vortex groove is opposite to the rotation direction of the vortex groove in the annular floor with etched vortex grooves;

[0009] The short-circuit probes are arranged in a circle, the bottom of the short-circuit probes is placed inside the circular floor of the etched vortex groove, and the top of the short-circuit probes is placed on the outer curved edge of the vortex groove of the circular patch of the etched vortex groove after vertically passing through the 6 circular apertures of the supporting medium and the 6 circular grooves of the supporting medium plate; the interval between the short-circuit probes is 60°; there is one feeding probe, and the diameter of the feeding protection hole is larger than the diameter of the feeding probe;

[0010] The circular patch of the etched vortex groove and the circular floor of the etched vortex groove have the same curvature radius, and the vortex groove angles of the circular patch of the etched vortex groove and the circular floor of the etched vortex groove are different; the vortex groove angle of the circular patch of the etched vortex groove is greater than the vortex groove angle in the circular floor of the etched vortex groove.

[0011] The diameter of the short-circuit probe is larger than the diameter of the feeding probe.

[0012] The vortex groove angle of the annular patch with etched vortex grooves is greater than 10 degrees, and the vortex groove angle in the annular floor with etched vortex grooves is less than 3 degrees.

[0013] The medium parameters of the supporting medium and the supporting medium plate are different; the height of the supporting medium is greater than the height of the supporting medium plate; the height of the medium is greater than 15 mm, and the height of the supporting medium plate is less than 3 mm.

[0014] Due to the adoption of the above technical solution, the broadband omnidirectional satellite navigation antenna with wide beam performance provided by the present invention obtains good impedance matching in a wide frequency band and can cover multiple satellite navigation systems. In addition, the antenna also obtains a wider 3-dB axial ratio beam width and half-power beam width in a wide frequency band, which can effectively improve the positioning accuracy. In summary, the broadband omnidirectional satellite navigation antenna with wide beam performance provided by the present invention is very suitable for occasions requiring high positioning accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is an exploded structural diagram of the wide-beam broadband omnidirectional satellite navigation antenna of the present invention;

[0017] Figure 2 It is a standing wave ratio diagram of the wide beam broadband omnidirectional satellite navigation antenna of the present invention;

[0018] Figure 3 It is the radiation directivity diagram of the wide-beam broadband omnidirectional satellite navigation antenna of the present invention at the frequency point of 1207MHZ;

[0019] Figure 4 It is the radiation directivity diagram of the wide-beam broadband omnidirectional satellite navigation antenna of the present invention at the frequency point of 1227MHZ;

[0020] Figure 5 It is the radiation directivity diagram of the wide-beam broadband omnidirectional satellite navigation antenna of the present invention at the frequency point of 1247MHZ;

[0021] Figure 6 It is the radiation directivity diagram of the wide-beam broadband omnidirectional satellite navigation antenna of the present invention at the frequency point of 1561MHZ;

[0022] Figure 7 It is the radiation directivity diagram of the wide-beam broadband omnidirectional satellite navigation antenna of the present invention at the frequency point of 1575MHZ;

[0023] Figure 8 It is a circular polarization axis ratio diagram of the wide beam broadband omnidirectional satellite navigation antenna of the present invention at a frequency point of 1207 MHZ;

[0024] Fig. 9 It is a circular polarization axis ratio diagram of the wide beam broadband omnidirectional satellite navigation antenna of the present invention at a frequency point of 1227 MHZ;

[0025] Fig.10 It is a circular polarization axis ratio diagram of the wide beam broadband omnidirectional satellite navigation antenna of the present invention at a frequency point of 1247 MHZ;

[0026] Fig.11 It is a circular polarization axis ratio diagram of the wide beam broadband omnidirectional satellite navigation antenna of the present invention at a frequency point of 1561MHZ;

[0027] Fig.12 It is a circular polarization axis ratio diagram of the wide beam broadband omnidirectional satellite navigation antenna of the present invention at a frequency point of 1575 MHZ;

[0028] In the figure: 1. a circular radiation patch of a gap-loaded vortex groove, 11. a circular patch, 12. an annular gap, 13. an annular patch of an etched vortex groove, 2. a supporting dielectric plate, 21. a dielectric substrate, 22. a circular groove, 3. a supporting dielectric, 31. a cylindrical dielectric, 32. a circular aperture, 4. a vortex groove floor, 41. a feeding protection hole, 42. an annular floor of an etched vortex groove, 5. a short-circuit probe, 6. a feeding probe. DETAILED DESCRIPTION

[0029] In order to make the technical solutions and advantages of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention:

[0030] like Figure 1 The broadband omnidirectional satellite navigation antenna with wide beam performance shown in the figure includes, from top to bottom, a slot-loaded vortex groove circular radiation patch 1, a supporting dielectric plate 2, a supporting dielectric 3, a vortex groove floor 4, a short-circuit probe 5 and a feeding probe 6; further, the slot-loaded vortex groove circular radiation patch 1 includes a circular patch 11, an annular gap 12 and an annular patch 13 with etched vortex grooves arranged in sequence from the center to the edge; the feeding probe 5 is connected to the circular patch 11, and the outer periphery of the circular patch 11 is an annular gap 12 to achieve same-layer capacitive coupling feeding; the number of vortex grooves in the annular patch 13 with etched vortex grooves is 6; the spacing of vortex grooves in the annular patch 13 with etched vortex grooves is 60°; the diameter of the slot-loaded vortex groove circular radiation patch 1 is 160 mm. Further, the supporting dielectric plate 2 includes a dielectric substrate 21 and 6 circular grooves 22; the supporting dielectric plate 2 (relative dielectric constant ε r =3.5, loss tangent tanδ=0.003) has a diameter of 160 mm and a thickness of 1.5 mm, and the interval between the six circular grooves is 60°; further, the supporting medium 3 includes a cylindrical medium 31 and six circular apertures 32; the supporting medium 3 (relative dielectric constant ε r=3, loss tangent tanδ=0.02) has a diameter of 84mm and a thickness of 21mm. Furthermore, the vortex groove floor 4 includes a central feeding protection hole 41 and an annular floor 42 with etched vortex grooves; the number of vortex grooves in the annular floor 42 with etched vortex grooves is 6; the interval between the vortex grooves in the annular floor 42 with etched vortex grooves is 60°; the curvature radius of the vortex grooves in the annular patch 13 with etched vortex grooves and the annular floor 42 with etched vortex grooves is 76mm; the vortex groove angle of the annular patch 13 with etched vortex grooves is 14deg, and the vortex groove angle in the annular floor 42 with etched vortex grooves is 1.5deg; the diameter of the vortex groove floor is 104mm; there are 6 short-circuit probes 5, the radius of the 6 short-circuit probes is 3mm, and the interval is 60°; there is 1 feeding probe 6 with a diameter of 1mm, and the diameter of the feeding protection hole 41 is larger than the diameter of the feeding probe 6.

[0031] The technical indicators adopted by the present invention are as follows:

[0032] Frequency range: 1140~1590MHz

[0033] Axis ratio: ≤3dB

[0034] Polarization: RHCP

[0035] Axis ratio beam width: >200°

[0036] Half power beam width: >200°

[0037] like Figure 1 The broadband omnidirectional satellite navigation antenna with wide beam performance shown in the figure includes, from top to bottom, a slot-loaded vortex groove circular radiation patch 1, a supporting medium plate 2, a supporting medium 3, a vortex groove floor 4, a short-circuit probe 5 and a feeding probe 6; further, the circular patch 11 of the slot-loaded vortex groove circular radiation patch 1 is connected to the vortex groove floor 4 through the central feeding probe 6, and the bottom of the short-circuit probe 5 is placed inside the circular floor 42 of the etched vortex groove, and after passing through the 6 circular apertures 32 of the supporting medium 3 and the 6 circular grooves 22 of the supporting medium plate 2, the top end is placed on the outer curved edge of the vortex groove of the circular patch 13 of the etched vortex groove.

[0038] like Figure 2 As shown, the broadband omnidirectional satellite navigation antenna with wide beam performance proposed by the present invention operates in low frequency bands and high frequency bands, covering 1140-1590 MHz, and is used to receive signals in the BDS B1 / B2 band, GALILEO L1 / E5b band, GPS L1 / L2 band and GLONASS L2 band, thereby realizing signal reception in a wide frequency range.

[0039] like Figures 3 to 7 As shown, the broadband omnidirectional satellite navigation antenna with wide beam performance proposed by the present invention has a half-power beam width of 207° (Phi=0°) at a low frequency band frequency of 1207 MHz; the half-power beam width at a low frequency band frequency of 1227 MHz is 209° (Phi=0°); the half-power beam width at a low frequency band frequency of 1247 MHz is 211° (Phi=0°); the half-power beam width at a high frequency band frequency of 1561 MHz is 206° (Phi=0°); the half-power beam width at a high frequency band frequency of 1575 MHz is 233° (Phi=0°); the half-power beam widths are all greater than 200°, indicating that the broadband omnidirectional satellite navigation antenna with wide beam performance proposed by the present invention has a wider half-power beam width.

[0040] like Figures 8 to 12 As shown, the axial ratio beam width of the broadband omnidirectional satellite navigation antenna with wide beam performance proposed by the present invention at the low frequency band frequency 1207MHz is 217° (Phi=0°); the axial ratio beam width at the low frequency band frequency 1227MHz is 233° (Phi=0°); the axial ratio beam width at the low frequency band frequency 1247MHz is 244° (Phi=0°); the axial ratio beam width at the high frequency band frequency 1561MHz is 261° (Phi=0°); the axial ratio beam width at the high frequency band frequency 1575MHz is 257° (Phi=0°). The axial ratio beam widths are all over 200°, indicating that the broadband omnidirectional satellite navigation antenna with wide beam performance of the present invention has a wider axial ratio beam width.

[0041] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A broadband omnidirectional satellite navigation antenna with wide beam performance, Features include: A gap-loaded vortex trough circular radiation patch (1), a supporting dielectric plate (2), a supporting dielectric (3), a vortex trough floor (4), a short-circuit probe (5) and a feeding probe (6); The slot-loaded vortex groove circular radiation patch (1) comprises a circular patch (11), an annular slot (12) and an annular patch (13) with etched vortex grooves, which are arranged in sequence from the center to the edge; the feeding probe (5) is connected to the circular patch (11), and the annular slot (12) is arranged on the periphery of the circular patch (11) for same-layer capacitive coupling feeding; the number of vortex grooves in the annular patch (13) with etched vortex grooves is 6; the interval of vortex grooves in the annular patch (13) with etched vortex grooves is 60°; the supporting medium plate (2) comprises a dielectric substrate (21) and 6 circular slots (22); the supporting medium (3) comprises a cylindrical medium (31) and 6 circular apertures (32); The vortex groove floor (4) comprises a central power feeding protection hole (41) and an annular floor (42) with etched vortex grooves; the number of vortex grooves in the annular floor (42) with etched vortex grooves is 6; the interval between the vortex grooves in the annular floor (42) with etched vortex grooves is 60°; the annular patch (13) with etched vortex grooves and the rotation direction of the vortex grooves in the annular floor (42) with etched vortex grooves are opposite; The short-circuit probes (5) are arranged in a circle, the bottom of the short-circuit probes (5) are arranged inside the circular ring floor (42) of the etched vortex groove, vertically upward through the six circular apertures (32) of the supporting medium (3) and the six circular grooves (22) of the supporting medium plate (2), and the top of the short-circuit probes (5) are placed on the outer curved edge of the vortex groove of the circular ring patch (13) of the etched vortex groove; the interval between the short-circuit probes (5) is 60°, the number of the feeding probes (6) is one, and the diameter of the feeding protection hole (41) is larger than the diameter of the feeding probe (6).

2. The broadband omnidirectional satellite navigation antenna with wide beam performance according to claim 1, Features: The annular patch (13) of the etched vortex groove and the annular floor (42) of the etched vortex groove have the same curvature radius, and the annular patch (13) of the etched vortex groove and the annular floor (42) of the etched vortex groove have different vortex groove angles; the vortex groove angle of the annular patch (13) of the etched vortex groove is greater than the vortex groove angle in the annular floor (42) of the etched vortex groove.

3. The broadband omnidirectional satellite navigation antenna with wide beam performance according to claim 1, Its characteristics are also: The diameter of the short-circuit probe (5) is greater than the diameter of the feeding probe (6).

4. The broadband omnidirectional satellite navigation antenna with wide beam performance according to claim 1, Features: The vortex groove angle of the annular patch (13) with etched vortex grooves is greater than 10 degrees, and the vortex groove angle in the annular floor (42) with etched vortex grooves is less than 3 degrees.

5. The broadband omnidirectional satellite navigation antenna with wide beam performance according to claim 1, Features: The medium parameters of the supporting medium (3) and the supporting medium plate (2) are different; the height of the supporting medium (3) is greater than the height of the supporting medium plate (2); the height of the medium (3) is greater than 15 mm, and the height of the supporting medium plate (2) is less than 3 mm.

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