Patch antenna module

Abstract

The invention relates to a patch antenna module technology mounted on a vehicle, and provides a patch antenna module. By arranging a plurality of choke strips around the patch antenna, even if the size of the patch antenna is small, the antenna performance same as or higher than that of a patch antenna of a traditional size can be provided.

Description

TECHNICAL FIELD

[0001] The present application relates to a patch antenna module installed in a vehicle. BACKGROUND

[0002] Patch antennas are installed in vehicles, unmanned aerial vehicles, information communication terminals, and the like, and are used to transmit and receive signals in the GPS (Global Positioning System) and GNSS (Global Navigation Satellite System) bands and the like.

[0003] The patch antenna includes a dielectric body having a predetermined thickness, a planar upper patch serving as an antenna that is laminated to an upper surface of the dielectric body, and a lower patch that is laminated to a lower surface of the dielectric body. Here, since the dielectric body is mainly made of ceramic, which has excellent characteristics such as a high dielectric constant and a low coefficient of thermal expansion and is widely used in high-frequency devices, the patch antenna is also called a ceramic patch antenna.

[0004] In recent years, manufacturers of vehicles, unmanned aerial vehicles, and the like have demanded miniaturization of patch antennas. However, when patch antennas are miniaturized, there is a problem in that antenna characteristics such as bandwidth and gain deteriorate.

[0005] The contents described in the foregoing background are intended to assist in understanding the background of the present application and can include contents that do not constitute the prior art. SUMMARY

[0006] TECHNICAL PROBLEM

[0007] Therefore, the present application has been made to solve the above-mentioned problems occurring in the related art, and the object of the present application is to provide a patch antenna module in which choke bars are arranged around a patch antenna provided on a substrate, so that even if a patch antenna having a smaller size than a conventional patch antenna is used, antenna performance such as bandwidth and directivity equal to or superior to that of the conventional patch antenna can be provided.

[0008] SOLUTION

[0009] To achieve the object of the present application, a patch antenna module according to the present application includes a substrate having a ground area, a first patch antenna provided on an upper portion of the substrate, and a plurality of choke bars provided on the upper portion of the substrate, connected to the ground area of the substrate, and arranged around a side surface of the first patch antenna.

[0010] The first patch antenna can have a first side, a second side, a third side, and a fourth side, and the plurality of choke bars can include: a first choke bar facing and spaced apart from the first side of the first patch antenna by a preset gap; a second choke bar facing and spaced apart from the second side of the first patch antenna by a preset gap; a third choke bar facing and spaced apart from the third side of the first patch antenna by a preset gap; and a fourth choke bar facing and spaced apart from the fourth side of the first patch antenna by a preset gap.

[0011] The choke bar can include a first horizontal plate parallel to the substrate and facing a side of the first patch antenna, and a first vertical plate perpendicular to the substrate and the first horizontal plate and facing the side of the first patch antenna. A first end of the first vertical plate can be connected to a lower portion of the first horizontal plate and to one of a right end and a left end of the first horizontal plate, and a second end of the first vertical plate can be connected to the ground region of the substrate.

[0012] The choke bar can further include a first dummy plate spaced apart from the first vertical plate, perpendicular to the substrate and the first horizontal plate, and facing the side of the first patch antenna. A first end of the first dummy plate can be connected to the lower portion of the first horizontal plate and to the other of the right end and the left end of the first horizontal plate, and a second end of the first dummy plate can be connected to the substrate.

[0013] The choke bar can further include a second dummy plate spaced apart from the first vertical plate and the first dummy plate, disposed between the first vertical plate and the first dummy plate, perpendicular to the substrate and the first horizontal plate, and facing the side of the first patch antenna. A first end of the second dummy plate can be connected to the lower portion of the first horizontal plate, and a second end of the first dummy plate can be connected to the substrate.

[0014] At least one of the first dummy plate and the second dummy plate can be divided into a first region and a second region. The first region can be formed of a dielectric material and disposed between the first horizontal plate and the second region to be connected to the first horizontal plate and the second region. The second region can be formed of a conductive material and connected to the first region and the substrate.

[0015] The choke bar can include a second vertical plate disposed perpendicular to the substrate and the first horizontal plate and facing a side of the first patch antenna. A first end of the second vertical plate can be spaced apart from the first vertical plate and connected to the lower portion of the first horizontal plate, and a second end of the second vertical plate can be connected to the grounding region of the substrate.

[0016] The choke bar can further include a first dummy plate spaced apart from the first vertical plate and the second vertical plate, perpendicular to the substrate and the first horizontal plate, and facing a side of the first patch antenna. A first end of the first dummy plate can be connected to the lower portion of the first horizontal plate and to another one of a right end and a left end of the first horizontal plate, and a second end of the first dummy plate can be connected to the substrate.

[0017] The choke bar can have a predetermined height and a predetermined length and be disposed to be spaced apart from a side of the first patch antenna by a predetermined gap. The predetermined height, the predetermined length, and the predetermined gap can each be 1 mm or more and λ / 2 or less.

[0018] The patch antenna module according to the present disclosure can further include a second patch antenna disposed on an upper portion of the substrate and interposed between the substrate and the first patch antenna. The first patch antenna can be an antenna that receives one of a right-hand circular polarization and a left-hand circular polarization, and the second patch antenna can be an antenna that receives the other of the right-hand circular polarization and the left-hand circular polarization.

[0019] The choke bar can include a first horizontal plate parallel to the substrate and facing sides of the first patch antenna and the second patch antenna, and a first vertical plate perpendicular to the substrate and the first horizontal plate and facing a side of the first patch antenna. A first end of the first vertical plate can be connected to the lower portion of the first horizontal plate and to a central portion of the lower portion of the first horizontal plate, and a second end of the first vertical plate can be connected to the grounding region of the substrate.

[0020] The choke bar can be divided into a left side region including a left portion of the first horizontal plate and a left portion of the first vertical plate and a right side region including a right portion of the first horizontal plate and a right portion of the first vertical plate. The left side region can be configured to function as a choke region for a patch antenna that receives the left-hand circular polarization among the first patch antenna and the second patch antenna, and the right side region can be configured to function as a choke region for a patch antenna that receives the right-hand circular polarization among the first patch antenna and the second patch antenna.

[0021] The choke bar can further include a second vertical plate spaced apart from the first vertical plate, perpendicular to the substrate and the first horizontal plate, and facing sides of the first patch antenna and the second patch antenna; and a third vertical plate spaced apart from the first vertical plate and the second vertical plate, perpendicular to the substrate and the first horizontal plate, and facing sides of the first patch antenna and the second patch antenna. A first end of the second vertical plate is connected to the lower portion of the first horizontal plate and to one of a right end and a left end of the first horizontal plate; a first end of the third vertical plate is connected to the lower portion of the first horizontal plate and to the other of the right end and the left end of the first horizontal plate; and second ends of the second vertical plate and the third vertical plate are spaced apart from the substrate. The second vertical plate and the third vertical plate are symmetrically arranged in a manner of sandwiching the first vertical plate.

[0022] The choke bar can be divided into a left side region and a right side region, the left side region including a left portion of the first horizontal plate, a left portion of the first vertical plate, and the second vertical plate, and the right side region including a right portion of the first horizontal plate, a right portion of the first vertical plate, and the third vertical plate; the left side region can be configured to function as a choke region for a patch antenna receiving a left-hand circular polarization among the first patch antenna and the second patch antenna, and the right side region can be configured to function as a choke region for a patch antenna receiving a right-hand circular polarization among the first patch antenna and the second patch antenna.

[0023] The choke bar can further include a second horizontal plate parallel to the substrate and the first horizontal plate and facing sides of the first patch antenna and the second patch antenna; and a third horizontal plate parallel to the substrate and the first horizontal plate and facing sides of the first patch antenna and the second patch antenna. The second horizontal plate and the third horizontal plate are symmetrically arranged in a manner of sandwiching the first vertical plate.

[0024] A first end of the second horizontal plate is connected to a right side of the second vertical plate and to a lower end of the second vertical plate; a second end of the second horizontal plate faces a left side of the first vertical plate and is disposed to be spaced apart therefrom; a first end of the third horizontal plate is connected to a left side of the third vertical plate and to a lower end of the third vertical plate; and a second end of the third horizontal plate faces a right side of the first vertical plate and is disposed to be spaced apart therefrom.

[0025] The choke bar can be divided into a left region and a right region, the left region including a left portion of the first horizontal plate, a left portion of the first vertical plate, the second vertical plate, and the second horizontal plate, the right region including a right portion of the first horizontal plate, a right portion of the first vertical plate, the third vertical plate, and the third horizontal plate; the left region can be configured to function as a choke region of a patch antenna receiving a left-hand circular polarization among the first patch antenna and the second patch antenna, and the right region can be configured to function as a choke region of a patch antenna receiving a right-hand circular polarization among the first patch antenna and the second patch antenna.

[0026] Advantages of the Invention

[0027] According to the present invention, the patch antenna module includes a plurality of choke bars arranged around the patch antenna, thereby preventing current flow of an upper patch of the patch antenna to a lower patch, increasing a bandwidth of a left-hand circular polarization (LHCP) or a right-hand circular polarization (RHCP), and thereby implementing a wideband characteristic.

[0028] In addition, the patch antenna module includes choke bars arranged around the patch antenna, and each of the choke bars has two or more contact points with the substrate, thereby preventing the choke bars from being tilted due to a tolerance in a manufacturing process or a vibration in actual use, and thereby preventing a gain reduction. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 FIG. 1 is a view for explaining a structure of a patch antenna module according to a first embodiment of the present invention.

[0030] Figure 2 FIG. 2 is a view for explaining a structure of a patch antenna module according to a second embodiment of the present invention. Figure 1 FIG. 3 is an exploded perspective view of a structure of the patch antenna shown in FIG. 2.

[0031] Figure 3 FIG. 4 is a view for explaining a structure of a patch antenna module according to a third embodiment of the present invention. Figure 1 FIG. 5 is a view for explaining a structure of a patch antenna module according to a fourth embodiment of the present invention.

[0032] Figure 4 FIG. 6 is a view for explaining a structure of a patch antenna module according to a fifth embodiment of the present invention. Figure 5 FIG. 7 is a view for explaining a structure of a patch antenna module according to a sixth embodiment of the present invention. Figure 1 FIG. 8 is a view for explaining a shape of a choke bar shown in FIG. 7.

[0033] Figure 6 FIG. 9 is a view for explaining a structure of a patch antenna module according to a seventh embodiment of the present invention. Figure 4 Figure 5 FIG. 10 is a view for explaining a structure of a patch antenna module according to an eighth embodiment of the present invention.

[0034] Figures 7 to 14 FIG. 11 is a view for explaining a structure of a patch antenna module according to a ninth embodiment of the present invention. Figure 6 FIG. 12 is a view for explaining various shapes of a choke bar for solving the problem shown in FIG. 11.

[0035] Figure 15 ​This is a view showing the measured data of the performance (gain) of a conventional patch antenna.

[0036] Figure 16 This is a view showing measurement data of the performance (gain) of a patch antenna module according to a first embodiment of the present invention.

[0037] Figure 17 This is a view used to illustrate a patch antenna module according to a second embodiment of the present invention.

[0038] Figure 18 For illustrative purposes Figure 17 The first patch antenna and the second patch antenna are shown in the diagram.

[0039] Figure 19 For illustrative purposes Figure 17 The view of the choke bar is shown.

[0040] Figures 20 to 22 For illustrative purposes Figure 17 Views of various shapes of choke bars are shown.

[0041] Figure 23 This is a view used to illustrate a performance (gain) comparison between a conventional patch antenna and a patch antenna module according to a second embodiment of the present invention.

[0042] Figure 24 This is a view illustrating the GNSS band return loss in a conventional stacked patch antenna, formed by stacking GNSS patch antennas (RHCP) and SXM patch antennas (LHCP).

[0043] Figure 25 This is a view used to illustrate the return loss of the patch antenna module in the GNSS band according to the second embodiment of the present invention.

[0044] Figure 26 A view illustrating the return loss of a conventional stacked patch antenna formed by stacking the GNSS patch antenna (RHCP) and the SXM patch antenna in the SXM band.

[0045] Figure 27 This is a view used to illustrate the return loss of the patch antenna module in the SXM band according to a second embodiment of the present invention. Detailed Implementation

[0046] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0047] The embodiments provided are intended to enable those skilled in the art to more fully understand the present invention, and the following embodiments can be modified into various other forms; the scope of the present invention is not limited to the following embodiments. The following embodiments are provided to make the description of the present invention more sufficient and complete, and to fully convey the technical spirit of the present invention to those skilled in the art.

[0048] The terminology used in this specification is for describing particular implementations only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular form is intended to include the plural form as well.

[0049] In the description of the embodiments, when layers (films), regions, patterns, or structures are described as being formed "on" or "below" a substrate, layers (films), regions, pads, or patterns, the terms "on" and "below" include both direct formation and indirect formation with intermediate layers therebetween. Furthermore, the expressions regarding "on" or "below" layers are based on the accompanying drawings.

[0050] The accompanying drawings are provided only to facilitate understanding of the spirit of the invention and are not intended to limit the scope of the invention. Furthermore, for ease of description and clarity, the relative thicknesses, lengths, and dimensions of the components shown in the drawings may be enlarged.

[0051] Reference Figure 1 According to the first embodiment of the present invention, the patch antenna module 100 includes a substrate 110, a patch antenna 120, and a plurality of choke bars 130.

[0052] The substrate 110 is configured as a plate-shaped substrate and includes a grounding area connected to a plurality of chokes 130. The substrate 110 may be a separate substrate 110 for mounting the patch antenna 120, or a circuit board 110 on which signal processing circuitry or signal processing chipset for processing signals received by the patch antenna 120 is mounted.

[0053] The patch antenna 120 is mounted on the upper surface of the substrate 110 for transmitting and receiving right-hand circularly polarized (RHCP) signals or left-hand circularly polarized (LHCP) signals. The patch antenna 120 includes an upper surface, a lower surface, a first side surface, a second side surface adjacent to the first side surface, a third side surface opposite to the first side surface and adjacent to the second side surface, and a fourth side surface opposite to the second side surface and adjacent to the first and third side surfaces.

[0054] Reference Figure 2 The patch antenna 120 includes a substrate 121, an upper patch 122, a lower patch 123, and a feed pin 124.

[0055] The substrate 121 is made of a dielectric material. As an example, the substrate 121 may be a dielectric substrate 110 made of a ceramic material with properties such as high dielectric constant and low coefficient of thermal expansion.

[0056] The substrate 121 may also be made of a magnetic material. As an example, the substrate 121 may be a magnetic substrate 110 made of a magnetic material such as ferrite.

[0057] The upper patch 122 is disposed on the upper surface of the substrate 121. The upper patch 122 is formed of a thin plate made of a conductive material with high conductivity, such as copper, aluminum, gold or silver. The upper patch 122 can be formed into various shapes, such as quadrilateral, triangle or octagon.

[0058] The lower patch 123 is disposed on the lower surface of the substrate 121 and is opposite to the upper patch 122 across the substrate 121. The lower patch 123 is formed of a thin plate made of a conductive material with high conductivity, such as copper, aluminum, gold, or silver. The lower patch 123 can be formed into various shapes, such as quadrilateral, triangle, or octagon.

[0059] A first through hole 121a is formed in the substrate 121 for the feeding needle 124 to pass through, a second through hole 122a is formed in the upper patch 122, and a third through hole 123a is formed in the lower patch 123. When the substrate 121, the upper patch 122, and the lower patch 123 are stacked, the first through hole 121a to the third through hole 123a overlap each other, thereby forming a feeding hole for the feeding needle 124 to be inserted and passed through.

[0060] Multiple chokes 130 are mounted on the substrate 110. The multiple chokes 130 are arranged around the patch antenna 120. The multiple chokes 130 are arranged to surround the side of the patch antenna 120. As an example, the multiple chokes 130 include a first choke 130a, a second choke 130b, a third choke 130c, and a fourth choke 130d.

[0061] The first choke bar 130a is mounted on the upper surface of the substrate 110 and is positioned facing the first side of the patch antenna 120. The first choke bar 130a is spaced apart from the first side of the patch antenna 120 by a predetermined gap.

[0062] The second choke bar 130b is mounted on the upper surface of the substrate 110 and is positioned facing the second side of the patch antenna 120. The second choke bar 130b is spaced apart from the second side of the patch antenna 120 by a predetermined gap.

[0063] The third choke bar 130c is mounted on the upper surface of the substrate 110 and is positioned to face the third side of the patch antenna 120. The third choke bar 130c is spaced apart from the third side of the patch antenna 120 by a predetermined gap. The third choke bar 130c is positioned opposite the first choke bar 130a across the patch antenna 120.

[0064] The fourth choke bar 130d is mounted on the upper surface of the substrate 110 and is positioned to face the fourth side of the patch antenna 120. The fourth choke bar 130d is spaced apart from the fourth side of the patch antenna 120 by a predetermined gap. The fourth choke bar 130d is positioned opposite the second choke bar 130b across the patch antenna 120.

[0065] Reference Figure 3 The choke bar 130 has a preset height H, a preset length L, and a preset gap G. Here, the preset height H is the vertical height of the choke bar 130, for example, 1 mm or more and λ / 2 or less. The preset length L is the horizontal length of the choke bar 130, for example, 1 mm or more and λ / 2 or less. The preset gap G is the separation distance between the patch antenna 120 and the choke bar 130, for example, 1 mm or more and λ / 2 or less. Wherein, λ represents the wavelength of the resonant frequency band of the patch antenna.

[0066] The first choke bar 130a to the fourth choke bar 130d prevent the current from flowing from the upper patch 122 to the lower patch 123.

[0067] Therefore, the patch antenna module 100 can increase the bandwidth of left-hand circular polarization (LHCP) or right-hand circular polarization (RHCP), thereby achieving broadband characteristics.

[0068] In addition, the first choke bar 130a to the fourth choke bar 130d increase the main lobe by reflecting the back lobe, thereby improving the directivity of the patch antenna 120.

[0069] Therefore, the first choke bar 130a to the fourth choke bar 130d are formed into various shapes, including a horizontal plate disposed parallel to the substrate 110 and a vertical plate disposed perpendicular to the substrate 110.

[0070] Various modifications of the choke bar 130 included in the patch antenna module 100 according to the first embodiment of the present invention will now be described with reference to the accompanying drawings.

[0071] Reference Figure 4 and Figure 5 The choke bar 130 may be configured to include a first horizontal plate 131 and a first vertical plate 132.

[0072] The first horizontal plate 131 is formed of a plate-shaped conductor. The first horizontal plate 131 is configured to be parallel to the substrate 110 and face the side of the patch antenna 120.

[0073] The first vertical plate 132 is formed of a plate-shaped conductor. The first vertical plate 132 is configured to be perpendicular to the substrate 110 and to be positioned on the side facing the patch antenna 120. The first vertical plate 132 is integrally formed with the first horizontal plate 131, and as shown, the first end of the first vertical plate 132 is connected to the lower part of the first horizontal plate 131.

[0074] The connection position between the first vertical plate 132 and the first horizontal plate 131 can vary depending on the polarization of the patch antenna 120.

[0075] When the patch antenna 120 is a left-hand circularly polarized antenna, when viewed from the location of the patch antenna 120, the first vertical plate 132 is connected to the lower part of the first horizontal plate 131 and to the right end of the first horizontal plate 131. Therefore, when viewed from the location of the patch antenna 120, the choke bar 130 appears as a "..." "shape (see Figure 4 ).

[0076] When the patch antenna 120 is a right-hand circularly polarized antenna, when viewed from the location of the patch antenna 120, the first vertical plate 132 is connected to the lower part of the first horizontal plate 131 and to the left end of the first horizontal plate 131. Therefore, when viewed from the location of the patch antenna 120, the choke bar 130 appears as an inverted "V" shape. "shape (see Figure 5 ).

[0077] Reference Figure 6 Since the choke strip 130 is fixed to the substrate 110 via the first vertical plate 132, the choke strip 130 may be assembled in an inclined state during the assembly process, or the first horizontal plate 131 may tilt due to vibrations generated during vehicle operation. In this case, when the choke strip 130 is tilted by about 10 degrees, the gain of the patch antenna module 100 will decrease by about 7 dBic to 21 dBic.

[0078] Therefore, the choke bar 130 is configured to have two or more contact points with the substrate 110, thereby preventing the choke bar 130 from tilting and thus preventing the gain of the patch antenna module 100 from decreasing.

[0079] Reference Figure 7 and Figure 8 The choke bar 130 may be configured to include a first horizontal plate 131, a first vertical plate 132 and a second vertical plate 133.

[0080] The first horizontal plate 131 is formed of a plate-shaped conductor. The first horizontal plate 131 is configured to be parallel to the substrate 110 and face the side of the patch antenna 120.

[0081] The first vertical plate 132 is formed of a plate-shaped conductor. The first vertical plate 132 is configured to be perpendicular to the substrate 110 and face the side of the patch antenna 120. The first vertical plate 132 is integrally formed with the first horizontal plate 131. As shown, the first end of the first vertical plate 132 is connected to the lower part of the first horizontal plate 131, and the second end of the first vertical plate 132 is connected to the ground terminal of the substrate 110.

[0082] The connection position between the first vertical plate 132 and the first horizontal plate 131 can vary depending on the polarization of the patch antenna 120.

[0083] When the patch antenna 120 is a left-hand circularly polarized antenna, when viewed from the location of the patch antenna 120, the first vertical plate 132 is connected to the lower part of the first horizontal plate 131 and to the right end of the first horizontal plate 131.

[0084] When the patch antenna 120 is a right-hand circularly polarized antenna, when viewed from the location of the patch antenna 120, the first vertical plate 132 is connected to the lower part of the first horizontal plate 131 and to the left end of the first horizontal plate 131.

[0085] The second vertical plate 133 is formed of a plate-shaped conductor. The second vertical plate 133 is configured to be perpendicular to the substrate 110 and face the side of the patch antenna 120. The second vertical plate 133 is integrally formed with the first horizontal plate 131. As shown in the figure, the first end of the second vertical plate 133 is connected to the lower part of the first horizontal plate 131, and the second end of the second vertical plate 133 is connected to the ground terminal of the substrate 110.

[0086] The second vertical plate 133 is connected to the first horizontal plate 131 at a position adjacent to the first vertical plate 132. The second vertical plate 133 is spaced apart from the first vertical plate 132 by a preset gap and is set to be parallel to the first vertical plate 132.

[0087] When the patch antenna 120 is configured as a left-hand circularly polarized antenna, and when viewed from the position of the patch antenna 120, the first vertical plate 132 is connected to the right end of the first horizontal plate 131, the second vertical plate 133 is set to be offset to the right side of the first horizontal plate 131 and connected to a position on the first horizontal plate 131 that is spaced apart from the first vertical plate 132 by a preset gap (see...). Figure 7 ).

[0088] When the patch antenna 120 is configured as a right-hand circularly polarized antenna, and when viewed from the position of the patch antenna 120, the first vertical plate 132 is connected to the left end of the first horizontal plate 131, the second vertical plate 133 is set to be offset to the left side of the first horizontal plate 131 and connected to a position on the first horizontal plate 131 that is spaced apart from the first vertical plate 132 by a preset gap (see...). Figure 8 ).

[0089] Reference Figure 9 and Figure 10 The choke bar 130 may be configured to include a first horizontal plate 131, a first vertical plate 132, and a first dummy plate 134.

[0090] The first horizontal plate 131 is formed of a plate-shaped conductive material. The first horizontal plate 131 is configured to be parallel to the substrate 110 and face the side of the patch antenna 120.

[0091] The first vertical plate 132 is formed of a plate-shaped conductive material. The first vertical plate 132 is configured to be perpendicular to the substrate 110 and face the side of the patch antenna 120. The first vertical plate 132 is integrally formed with the first horizontal plate 131, and as shown in the figure, the first end of the first vertical plate 132 is connected to the lower part of the first horizontal plate 131.

[0092] The connection position between the first vertical plate 132 and the first horizontal plate 131 can vary depending on the polarization of the patch antenna 120.

[0093] When the patch antenna 120 is a left-hand circularly polarized antenna, when viewed from the location of the patch antenna 120, the first vertical plate 132 is connected to the lower part of the first horizontal plate 131 and to the right end of the first horizontal plate 131.

[0094] When the patch antenna 120 is a right-hand circularly polarized antenna, when viewed from the location of the patch antenna 120, the first vertical plate 132 is connected to the lower part of the first horizontal plate 131 and to the left end of the first horizontal plate 131.

[0095] The first dummy plate 134 is formed of a plate-shaped dielectric material. The first dummy plate 134 is configured to be perpendicular to the substrate 110 and face the side of the patch antenna 120. As shown in the figure, the first end of the first dummy plate 134 is connected to the lower part of the first horizontal plate 131, and the second end of the first dummy plate 134 is connected to the ground terminal of the substrate 110.

[0096] The first dummy plate 134 is connected to the position on the lower part of the first horizontal plate 131 opposite to the first vertical plate 132.

[0097] When the patch antenna 120 is configured as a left-hand circularly polarized antenna and the first vertical plate 132 is connected to the right end of the first horizontal plate 131, the first dummy plate 134 is connected to the left end of the first horizontal plate 131 (see [link]). Figure 9 ).

[0098] When the patch antenna 120 is configured as a right-hand circularly polarized antenna and the first vertical plate 132 is connected to the left end of the first horizontal plate 131, the first dummy plate 134 is connected to the right end of the first horizontal plate 131 (see [link]). Figure 10 ).

[0099] The first dummy board 134 can be divided into a first region 134a and a second region 134b. The first region 134a is the region sandwiched between the first horizontal board 131 and the second region 134b, formed of a plate-shaped dielectric material, and connected to the lower part of the first horizontal board 131. The second region 134b is formed of a plate-shaped conductor and is connected to the lower part of the first region 134a and the substrate 110 as shown in the figure.

[0100] The choke bar 130 may be configured to include a first horizontal plate 131, a first vertical plate 132, a second vertical plate 133, and a first dummy plate 134.

[0101] Reference Figure 11 When the patch antenna 120 is a left-hand circularly polarized antenna, when viewed from the location of the patch antenna 120, the first vertical plate 132 is connected to the lower part of the first horizontal plate 131 and to the right end of the first horizontal plate 131.

[0102] The second vertical plate 133 is positioned to the right of the first horizontal plate 131 and is connected to a position on the first horizontal plate 131 that is spaced apart from the first vertical plate 132 by a preset gap.

[0103] The first dummy plate 134 is connected to the left end of the first horizontal plate 131. Therefore, the second vertical plate 133 is disposed between the first vertical plate 132 and the first dummy plate 134, and is configured to be biased towards the first vertical plate 132.

[0104] Reference Figure 12 When the patch antenna 120 is a right-hand circularly polarized antenna, when viewed from the location of the patch antenna 120, the first vertical plate 132 is connected to the lower part of the first horizontal plate 131 and to the left end of the first horizontal plate 131.

[0105] The second vertical plate 133 is positioned to the left of the first horizontal plate 131 and is connected to a position on the first horizontal plate 131 that is spaced apart from the first vertical plate 132 by a preset gap.

[0106] The first dummy plate 134 is connected to the right end of the first horizontal plate 131. Therefore, the second vertical plate 133 is disposed between the first vertical plate 132 and the first dummy plate 134, and is configured to be biased towards the first vertical plate 132.

[0107] The choke bar 130 may be configured to include a first horizontal plate 131, a first vertical plate 132, a first dummy plate 134, and a second dummy plate 135. Similar to the first dummy plate 134, the second dummy plate 135 may be divided into a first region 135a and a second region 135b, wherein the first region 135a is a dielectric material sandwiched between the first horizontal plate 131 and the second region 135b, and the second region 135b is a conductor connected to the first region 135a and the substrate 110.

[0108] Reference Figure 13When the patch antenna 120 is a left-hand circularly polarized antenna, viewed from the location of the patch antenna 120, the first vertical plate 132 is connected to the lower part of the first horizontal plate 131 and to the right end of the first horizontal plate 131. The first dummy plate 134 is connected to the left end of the first horizontal plate 131. The second dummy plate 135 is positioned offset towards the left end of the first horizontal plate 131 and connected to a position on the first horizontal plate 131 that is spaced apart from the first dummy plate 134 by a preset gap. Therefore, the second dummy plate 135 is positioned between the first vertical plate 132 and the first dummy plate 134.

[0109] Reference Figure 14 When the patch antenna 120 is a right-hand circularly polarized antenna, viewed from the location of the patch antenna 120, the first vertical plate 132 is connected to the lower part of the first horizontal plate 131 and to the left end of the first horizontal plate 131. The first dummy plate 134 is connected to the right end of the first horizontal plate 131. The second dummy plate 135 is positioned offset towards the right end of the first horizontal plate 131 and connected to a position on the first horizontal plate 131 that is spaced apart from the first dummy plate 134 by a preset gap. Therefore, the second dummy plate 135 is disposed between the first vertical plate 132 and the first dummy plate 134.

[0110] Reference Figure 15 When the choke bar 130 used for right-hand circular polarization (see...) Figure 5 When arranged around the patch antenna 120 for transmitting and receiving right-hand circularly polarized GNSS signals, the gain is improved by approximately 1.2 dBic compared to a conventional patch antenna 120. When the choke bar 130 for left-hand circular polarization (see...) is used... Figure 4 When arranged around the patch antenna 120, the gain is reduced by approximately -0.4 dBic compared to the conventional patch antenna 120.

[0111] Reference Figure 16 When the choke bar 130 used for right-hand circular polarization (see...) Figure 5 When arranged around the patch antenna 120 for transmitting and receiving left-hand circularly polarized SXM signals, the gain is reduced by approximately 0.4 dBic compared to a conventional patch antenna 120. When the choke bar 130 for left-hand circular polarization (see...) is used... Figure 4 When arranged around the patch antenna 120, the gain is increased by approximately 0.4 dBic compared to the conventional patch antenna 120.

[0112] Therefore, in the patch antenna module 100 according to the first embodiment of the present invention, a choke bar 130 having the same polarization characteristics as the patch antenna 120 is arranged around the patch antenna 120. That is, when the patch antenna 120 is left-hand circularly polarized, the patch antenna module 100 includes... Figure 4 , Figure 7 , Figure 9 ,Figure 11 as well as Figure 13 The LHCP choke 130 is shown. When the patch antenna 120 is right-hand circularly polarized, the patch antenna module 100 includes... Figure 5 , Figure 8 , Figure 10 , Figure 12 as well as Figure 14 The RHCP choke bar 130 shown is shown.

[0113] Reference Figure 17 According to the second embodiment of the present invention, the patch antenna module 200 includes a substrate 210, a first patch antenna 220, a second patch antenna 230, and a plurality of chokes 240.

[0114] The substrate 210 is configured as a plate-shaped substrate and includes a grounding area connected to a plurality of choke bars 240. The substrate 210 may be a separate substrate 210 for mounting the first patch antenna 220 and the second patch antenna 230, or it may be a circuit board 210 on which a signal processing circuit or a signal processing chipset is mounted for processing signals received from the first patch antenna 220 and the second patch antenna 230.

[0115] The first patch antenna 220 is mounted on the upper part of the substrate 210 and is used to transmit and receive one of right-hand circularly polarized (RHCP) signals and left-hand circularly polarized (LHCP) signals. The first patch antenna 220 includes an upper surface, a lower surface, a first side surface, a second side surface adjacent to the first side surface, a third side surface opposite to the first side surface and adjacent to the second side surface, and a fourth side surface opposite to the second side surface and adjacent to the first and third side surfaces.

[0116] The second patch antenna 230 is mounted on the upper surface of the substrate 210 and sandwiched between the first patch antenna 220 and the substrate 210. The second patch antenna 230 transmits and receives either a right-hand circularly polarized (RHCP) signal or a left-hand circularly polarized (LHCP) signal. The second patch antenna 230 includes an upper surface, a lower surface, a first side surface, a second side surface adjacent to the first side surface, a third side surface opposite to the first side surface and adjacent to the second side surface, and a fourth side surface opposite to the second side surface and adjacent to both the first and third side surfaces.

[0117] Reference Figure 18 The first patch antenna 220 and the second patch antenna 230 are stacked to form a stacked patch antenna.

[0118] The first patch antenna 220 includes a first substrate 221, a first upper patch 222, a first lower patch 223, and a first feed pin 224.

[0119] The first substrate 221 is made of a dielectric material. As an example, the first substrate 221 may be a dielectric substrate 210 made of a ceramic material with properties such as high dielectric constant and low coefficient of thermal expansion.

[0120] The first substrate 221 may also be made of a magnetic material. As an example, the first substrate 221 may be a magnetic substrate 210 made of a magnetic material such as ferrite.

[0121] The first upper patch 222 is disposed on the upper surface of the first substrate 221. The first upper patch 222 is formed of a thin plate made of a conductive material with high conductivity, such as copper, aluminum, gold or silver. The first upper patch 222 can be formed into various shapes, such as quadrilateral, triangle or octagon.

[0122] The first lower patch 223 is disposed on the lower surface of the first substrate 221 and is positioned opposite the first upper patch 222 across the first substrate 221. The first lower patch 223 is formed from a thin sheet of a conductive material with high conductivity, such as copper, aluminum, gold, or silver. The first lower patch 223 can be formed into various shapes, such as quadrilaterals, triangles, or octagons.

[0123] A first through hole 221a is formed in the first substrate 221 for the first feed pin 224 to pass through, a second through hole 222a is formed in the first upper patch 222, and a third through hole 223a is formed in the first lower patch 223. When the first substrate 221, the first upper patch 222, and the first lower patch 223 are stacked, the first through hole 221a to the third through hole 223a overlap each other, thereby forming a feed hole for the first feed pin 224 to be inserted and passed through.

[0124] The second patch antenna 230 includes a second substrate 231, a second upper patch 232, a second lower patch 233, and a second feed pin 234.

[0125] The second substrate 231 is made of a dielectric material. As an example, the second substrate 231 may be a dielectric substrate 210 made of a ceramic material with properties such as high dielectric constant and low coefficient of thermal expansion.

[0126] The second substrate 231 may also be made of a magnetic material. As an example, the second substrate 231 may be a magnetic substrate 210 made of a magnetic material such as ferrite.

[0127] The second upper patch 232 is disposed on the upper surface of the second substrate 231. The second upper patch 232 is formed of a thin plate made of a conductive material with high conductivity, such as copper, aluminum, gold or silver. The second upper patch 232 can be formed into various shapes, such as quadrilateral, triangle or octagon.

[0128] The second lower patch 233 is disposed on the lower surface of the second substrate 231 and is positioned opposite the second upper patch 232 across the second substrate 231. The second lower patch 233 is formed from a thin sheet of a conductive material with high conductivity, such as copper, aluminum, gold, or silver. The second lower patch 233 can be formed into various shapes, such as quadrilaterals, triangles, or octagons.

[0129] The second substrate 231 has a fourth through hole 231a through which the first feed pin 224 passes, and a fifth through hole 231b through which the second feed pin 234 passes. The second upper patch 232 has a sixth through hole 232a through which the first feed pin 224 passes, and a seventh through hole 232b through which the second feed pin 234 passes. The second lower patch 233 has an eighth through hole 233a through which the first feed pin 224 passes, and a ninth through hole 233b through which the second feed pin 234 passes.

[0130] When the second substrate 231, the second upper patch 232, and the second lower patch 233 are stacked, the fourth through hole 231a, the sixth through hole 232a, and the eighth through hole 233a overlap each other, thereby forming a feed hole through which the first feed pin 224 is inserted. When the second patch antenna 230 is stacked below the first patch antenna 220, the fourth through hole 231a, the sixth through hole 232a, and the eighth through hole 233a overlap with the first through hole 221a to the third through hole 223a, thereby forming a feed hole through which the first feed pin 224 is inserted.

[0131] Multiple chokes 240 are mounted on the substrate 210. The multiple chokes 240 are disposed around the stacked patch antenna, that is, around the patch antenna formed by stacking the first patch antenna 220 and the second patch antenna 230.

[0132] As an example, the multiple chokes 240 include a first choke 240a, a second choke 240b, a third choke 240c, and a fourth choke 240d.

[0133] The first choke bar 240a is mounted on the upper surface of the substrate 210 and is positioned facing the first side of the patch antenna. The first choke bar 240a is spaced apart from the first side of the patch antenna by a predetermined gap.

[0134] The second choke bar 240b is mounted on the upper surface of the substrate 210 and is positioned facing the second side of the patch antenna. The second choke bar 240b is spaced apart from the second side of the patch antenna by a predetermined gap.

[0135] The third choke bar 240c is mounted on the upper surface of the substrate 210 and is positioned facing the third side of the patch antenna. The third choke bar 240c is spaced apart from the third side of the patch antenna by a predetermined gap. The third choke bar 240c is positioned opposite the first choke bar 240a across the patch antenna.

[0136] The fourth choke strip 240d is mounted on the upper surface of the substrate 210 and is positioned facing the fourth side of the patch antenna. The fourth choke strip 240d is spaced apart from the fourth side of the patch antenna by a predetermined gap. The fourth choke strip 240d is positioned opposite the patch antenna, spaced apart from the second choke strip 240b.

[0137] Reference Figure 19 The choke bar 240 has a preset height H, a preset length L, and a preset gap G. The preset height H is the vertical height of the choke bar 240, for example, greater than 1 mm and less than λ / 2. The preset length L is the horizontal length of the choke bar 240, for example, greater than 1 mm and less than λ / 2. The preset gap G is the separation distance between the patch antenna and the choke bar 240, for example, greater than 1 mm and less than λ / 2.

[0138] The first choke bar 240a to the fourth choke bar 240d prevent current from flowing from the upper chip to the lower chip.

[0139] Therefore, the patch antenna module 200 can increase the bandwidth of left-hand circular polarization (LHCP) and right-hand circular polarization (RHCP), thereby achieving broadband characteristics.

[0140] In addition, the first choke bar 240a to the fourth choke bar 240d reflect the back lobe to increase the main lobe, thereby improving the directivity of the patch antenna.

[0141] Therefore, the first choke bar 240a to the fourth choke bar 240d can be formed into various shapes, including a horizontal plate arranged parallel to the substrate 210 and a vertical plate perpendicular to the substrate 210.

[0142] Various modifications of the choke bar 240 included in the patch antenna module 200 according to the second embodiment of the present invention will now be described with reference to the accompanying drawings.

[0143] Reference Figure 20 The choke bar 240 may be configured to include a first horizontal plate 241 and a first vertical plate 242.

[0144] The first horizontal plate 241 is formed of a plate-shaped conductor. The first horizontal plate 241 is configured to be parallel to the substrate 210 and to be configured to face the side of the patch antenna.

[0145] The first vertical plate 242 is formed of a plate-shaped conductor. The first vertical plate 242 is configured to be perpendicular to the substrate 210 and to face the side of the patch antenna. The first vertical plate 242 is integrally formed with the first horizontal plate 241, and as shown, a first end of the first vertical plate 242 is connected to the lower part of the first horizontal plate 241. In this case, the first vertical plate 242 is connected to the central portion of the lower part of the first horizontal plate 241.

[0146] Therefore, when viewed from the location of the patch antenna, the choke bar 240 appears as a "T" shape.

[0147] When viewed from the location of the stacked patch antenna, the left region A of the choke bar 240 includes the left portion of the first horizontal plate 241 and the left portion of the first vertical plate 242. In this case, the left region A of the choke bar 240 is the choke region for the left-hand circularly polarized patch antenna in the first patch antenna 220 and the second patch antenna.

[0148] The right-side region B of the choke 240 includes the right portion of the first horizontal plate 241 and the right portion of the first vertical plate 242. The right-side region B of the choke 240 is symmetrical to the left-side region A. In this case, the right-side region B of the choke 240 is the choke region for the right-hand circularly polarized patch antenna in the first patch antenna 220 and the second patch antenna.

[0149] Reference Figure 21 The choke bar 240 may also be configured to further include a second vertical plate 243 and a third vertical plate 244.

[0150] The second vertical plate 243 and the third vertical plate 244 are formed of plate-shaped conductors. The second vertical plate 243 and the third vertical plate 244 are configured to be perpendicular to the substrate 210 and to face the side of the patch antenna.

[0151] The second vertical plate 243 and the third vertical plate 244 are integrally formed with the first horizontal plate 241, and as shown in the figure, the first ends of the second vertical plate 243 and the third vertical plate 244 are connected to the lower part of the first horizontal plate 241. In this case, the second ends of the second vertical plate 243 and the third vertical plate 244 are spaced apart from the substrate 210 by a predetermined gap.

[0152] When viewed from the location of the stacked patch antenna, the second vertical plate 243 is connected to the lower part of the first horizontal plate 241 and to the left end of the first horizontal plate 241.

[0153] Viewed from the location of the stacked patch antenna, the third vertical plate 244 is connected to the lower part of the first horizontal plate 241 and to the right end of the first horizontal plate 241. In this case, the third vertical plate 244 is arranged to be opposite and symmetrical to the second vertical plate 243, separated by the first vertical plate 242.

[0154] Therefore, when viewed from the location of the patch antenna, the choke bar 240 appears as an inverted "mountain".

[0155] When viewed from the location of the stacked patch antenna, the left region A of the choke bar 240 includes the left portion of the first horizontal plate 241, the left portion of the first vertical plate 242, and the second vertical plate 243. In this case, the left region A of the choke bar 240 is the choke region for the left-hand circularly polarized patch antenna in the first patch antenna 220 and the second patch antenna.

[0156] The right-side region B of the choke 240 includes the right portion of the first horizontal plate 241, the right portion of the first vertical plate 242, and the third vertical plate 244. The right-side region B of the choke 240 is symmetrical to the left-side region A. In this case, the right-side region B of the choke 240 serves as the choke region for the right-hand circularly polarized patch antenna in the first patch antenna 220 and the second patch antenna.

[0157] Reference Figure 22 The choke 240 may further include a second horizontal plate 245 and a third horizontal plate 246. The second horizontal plate 245 and the third horizontal plate 246 are integrally formed with the first horizontal plate 241, the first vertical plate 242 and the second vertical plate 243.

[0158] The second horizontal plate 245 and the third horizontal plate 246 are formed of plate-shaped conductors. The second horizontal plate 245 and the third horizontal plate 246 are configured to be parallel to the substrate 210 and the first horizontal plate 241, and are configured to face the sides of the stacked patch antenna.

[0159] The first end of the second horizontal plate 245 is connected to the right side of the second vertical plate 243 in the figure. As shown, the first end of the second horizontal plate 245 is connected to the right side of the second vertical plate 243 and to the lower end of the second vertical plate 243. As shown, the second end of the second horizontal plate 245 is positioned facing the left side of the first vertical plate 242 and is spaced apart from the first vertical plate 242 by a preset gap.

[0160] As shown in the figure, the first end of the third horizontal plate 246 is connected to the left side of the third vertical plate 244 and is positioned opposite the second horizontal plate 245, separated by a first vertical plate 242. The first end of the third horizontal plate 246 is also connected to the left side of the third vertical plate 244 and to its lower end. The second end of the third horizontal plate 246 is positioned to face the right side of the first vertical plate 242 and is spaced apart from the first vertical plate 242 by a predetermined gap.

[0161] When viewed from the location of the stacked patch antenna, the left region A of the choke bar 240 includes the left portion of the first horizontal plate 241, the left portion of the first vertical plate 242, the second vertical plate 243, and the second horizontal plate 245. In this case, the left region A of the choke bar 240 is the choke region for the left-hand circularly polarized patch antenna in the first patch antenna 220 and the second patch antenna.

[0162] The right-side region B of the choke 240 includes the right portion of the first horizontal plate 241, the right portion of the first vertical plate 242, the third vertical plate 244, and the third horizontal plate 246. The right-side region B of the choke 240 is symmetrical to the left-side region A. In this case, the right-side region B of the choke 240 is the choke region for the right-hand circularly polarized patch antenna in the first patch antenna 220 and the second patch antenna.

[0163] Thus, compared to traditional stacked patch antennas, the patch antenna module 200 according to the second embodiment of the present invention can improve antenna characteristics such as gain and bandwidth by arranging choke bars 240 with a left-right symmetrical shape around the stacked patch antenna.

[0164] Reference Figure 23 In the patch antenna module 200 according to the second embodiment of the present invention, a stacked patch antenna is provided, which is formed by stacking a right-hand circularly polarized GNSS patch antenna and a left-hand circularly polarized SXM patch antenna, and a "T"-shaped choke bar 240 is arranged around the stacked patch antenna (see Figure 20 This results in a gain increase of approximately 1 dBic in the GNSS band and approximately 1.2 dBic in the SXM band compared to traditional multilayer patch antennas.

[0165] Reference Figure 24 In a stacked patch antenna formed by stacking a right-hand circularly polarized GNSS patch antenna and a left-hand circularly polarized SXM patch antenna, a return loss of -10 dB or less was measured in the GNSS band from approximately 1.5390 GHz to 1.6058 GHz, and a GNSS band bandwidth of approximately 66 MHz was formed.

[0166] Reference Figure 25 The patch antenna module 200 according to a second embodiment of the present invention has a structure in which a "T"-shaped choke bar 240 is arranged around a stacked patch antenna. In this structure, the return loss is measured to be -10 dB or less in the GNSS band from approximately 1.5162 GHz to 1.6694 GHz, and a GNSS band bandwidth of approximately 153 MHz is formed. Therefore, compared to a conventional stacked patch antenna, the patch antenna module 200 according to the second embodiment of the present invention can increase the bandwidth of the right-hand circularly polarized GNSS band.

[0167] Reference Figure 26 In a stacked patch antenna formed by stacking a right-hand circularly polarized GNSS patch antenna and a left-hand circularly polarized SXM patch antenna, the return loss was measured to be -10 dB or less in the SXM band from approximately 2.2897 GHz to 2.3918 GHz, and an SXM band bandwidth of approximately 102 MHz was formed.

[0168] Reference Figure 27 The patch antenna module 200 according to a second embodiment of the present invention has a structure in which a "T"-shaped choke bar 240 is arranged around a stacked patch antenna. In this structure, the return loss is measured to be -10 dB or less in the SXM band from approximately 2.2461 GHz to 2.4438 GHz, and an SXM band bandwidth of approximately 197 MHz is formed. Therefore, compared to a conventional stacked patch antenna, the patch antenna module 200 according to the second embodiment of the present invention can increase the bandwidth of the left-hand circularly polarized SXM band.

[0169] Thus, the patch antenna module 200 according to the second embodiment of the present invention can increase the bandwidth of the right-hand circularly polarized GNSS band and the left-hand circularly polarized SXM band by arranging multiple chokes 240 around the stacked patch antenna.

[0170] The foregoing description is merely an illustrative example of the technical concept of the present invention. Those skilled in the art should understand that various modifications and variations can be made without departing from the essential characteristics of the invention. Therefore, the embodiments disclosed in this specification are intended to illustrate, not limit, the technical concept of the invention, and the scope of protection of the invention should not be construed as being limited by these embodiments. The scope of protection of the invention should be interpreted according to its claims, and all technical concepts within the same scope should be understood as being included within the scope of protection of the invention.

Claims

1. A patch antenna module, characterized in that, include: A substrate with a grounded area; A first patch antenna is disposed on the upper part of the substrate; as well as A plurality of choke strips are disposed on the upper part of the substrate, connected to the grounding area of ​​the substrate, and arranged around the side of the first patch antenna.

2. The patch antenna module according to claim 1, characterized in that, The first patch antenna has a first side, a second side, a third side, and a fourth side. The plurality of chokes includes: A first choke bar facing the first side of the first patch antenna and spaced apart from the first side of the first patch antenna by a preset gap; A second choke bar facing the second side of the first patch antenna and spaced apart from the second side of the first patch antenna by a preset gap; A third choke bar facing the third side of the first patch antenna and spaced apart from the third side of the first patch antenna by a predetermined gap; and A fourth choke bar facing the fourth side of the first patch antenna and spaced apart from the fourth side of the first patch antenna by a predetermined gap.

3. The patch antenna module according to claim 1, characterized in that, The choke bar includes: a first horizontal plate parallel to the substrate and facing the side of the first patch antenna, and a first vertical plate perpendicular to the substrate and the first horizontal plate and facing the side of the first patch antenna. The first end of the first vertical plate is connected to the lower part of the first horizontal plate, and is also connected to one of the right and left ends of the first horizontal plate. The second end of the first vertical plate is connected to the grounding area of ​​the substrate.

4. The patch antenna module according to claim 3, characterized in that, The choke bar also includes a first dummy plate, which is spaced apart from the first vertical plate, perpendicular to the substrate and the first horizontal plate, and faces the side of the first patch antenna. The first end of the first dummy plate is connected to the lower part of the first horizontal plate, and is also connected to the other of the right and left ends of the first horizontal plate. The second end of the first dummy board is connected to the substrate.

5. The patch antenna module according to claim 4, characterized in that, The choke bar also includes a second dummy plate, which is spaced apart from the first vertical plate and the first dummy plate, disposed between the first vertical plate and the first dummy plate, perpendicular to the substrate and the first horizontal plate, and facing the side of the first patch antenna. The first end of the second dummy board is connected to the lower part of the first horizontal board. The second end of the first dummy board is connected to the substrate.

6. The patch antenna module according to claim 5, characterized in that, At least one of the first virtual board and the second virtual board is divided into a first region and a second region. The first region is formed of a dielectric material and is disposed between the first horizontal plate and the second region to connect the first horizontal plate and the second region. The second region is formed of a conductive material and is connected to the first region and the substrate.

7. The patch antenna module according to claim 3, characterized in that, The choke bar includes a second vertical plate, which is configured to be perpendicular to the substrate and the first horizontal plate, and faces the side of the first patch antenna. The first end of the second vertical plate is spaced apart from the first vertical plate and connected to the lower part of the first horizontal plate. The second end of the second vertical plate is connected to the grounding area of ​​the substrate.

8. The patch antenna module according to claim 7, characterized in that, The choke bar also includes a first dummy plate, which is spaced apart from the first vertical plate and the second vertical plate, perpendicular to the substrate and the first horizontal plate, and facing the side of the first patch antenna. The first end of the first dummy plate is connected to the lower part of the first horizontal plate, and is also connected to the other of the right and left ends of the first horizontal plate. The second end of the first dummy board is connected to the substrate.

9. The patch antenna module according to claim 1, characterized in that, The choke bar has a preset height and a preset length, and is configured to be spaced apart from the side of the first patch antenna by a preset gap. The preset height, the preset length, and the preset gap are all above 1mm and below λ / 2.

10. The patch antenna module according to claim 1, characterized in that, It also includes a second patch antenna, which is disposed on the upper part of the substrate and sandwiched between the substrate and the first patch antenna. The first patch antenna is an antenna that receives either right-hand circular polarization or left-hand circular polarization. The second patch antenna is an antenna that receives either the right-hand circular polarization or the left-hand circular polarization.

11. The patch antenna module according to claim 10, characterized in that, The choke bar includes: a first horizontal plate parallel to the substrate and facing the side of the first patch antenna and the second patch antenna; and a first vertical plate perpendicular to the substrate and the first horizontal plate and facing the side of the first patch antenna. The first end of the first vertical plate is connected to the lower part of the first horizontal plate, and is also connected to the central portion of the lower part of the first horizontal plate. The second end of the first vertical plate is connected to the grounding area of ​​the substrate.

12. The patch antenna module according to claim 11, characterized in that, The choke bar is divided into a left region and a right region. The left region includes the left portion of the first horizontal plate and the left portion of the first vertical plate, and the right region includes the right portion of the first horizontal plate and the right portion of the first vertical plate. The left-hand region is configured as a choke region for receiving the left-hand circularly polarized patch antenna in the first patch antenna and the second patch antenna. The right-hand region is configured as a choke region for receiving the right-hand circularly polarized patch antenna in the first patch antenna and the second patch antenna.

13. The patch antenna module according to claim 11, characterized in that, The choke bar also includes: A second vertical plate, spaced apart from the first vertical plate, perpendicular to the substrate and the first horizontal plate, and facing the side of the first patch antenna and the second patch antenna; and A third vertical plate, spaced apart from the first vertical plate and the second vertical plate, perpendicular to the substrate and the first horizontal plate, and facing the side of the first patch antenna and the second patch antenna.

14. The patch antenna module according to claim 13, characterized in that, The first end of the second vertical plate is connected to the lower part of the first horizontal plate, and is also connected to one of the right and left ends of the first horizontal plate. The first end of the third vertical plate is connected to the lower part of the first horizontal plate, and is also connected to the other of the right and left ends of the first horizontal plate. The second end of the second vertical plate and the second end of the third vertical plate are spaced apart from the substrate.

15. The patch antenna module according to claim 13, characterized in that, The second vertical plate and the third vertical plate are symmetrically arranged in such a way that they sandwich the first vertical plate.

16. The patch antenna module according to claim 13, characterized in that, The choke bar is divided into a left region and a right region. The left region includes the left portion of the first horizontal plate, the left portion of the first vertical plate, and the second vertical plate. The right region includes the right portion of the first horizontal plate, the right portion of the first vertical plate, and the third vertical plate. The left-hand region is configured as a choke region for receiving left-hand circularly polarized patch antennas in the first and second patch antennas. The right-hand region is configured as a choke region for receiving right-hand circularly polarized patch antennas in the first and second patch antennas.

17. The patch antenna module according to claim 13, characterized in that, The choke bar also includes: A second horizontal plate parallel to the substrate and the first horizontal plate, and facing the side of the first patch antenna and the second patch antenna; and A third horizontal plate that is parallel to the substrate and the first horizontal plate and faces the side of the first patch antenna and the second patch antenna.

18. The patch antenna module according to claim 17, characterized in that, The second horizontal plate and the third horizontal plate are symmetrically arranged in such a way that they sandwich the first vertical plate.

19. The patch antenna module according to claim 17, characterized in that, The first end of the second horizontal plate is connected to the right side of the second vertical plate and to the lower end of the second vertical plate. The second end of the second horizontal plate faces the left side of the first vertical plate and is spaced apart from it. The first end of the third horizontal plate is connected to the left side of the third vertical plate and to the lower end of the third vertical plate. The second end of the third horizontal plate faces the right side of the first vertical plate and is spaced apart from it.

20. The patch antenna module according to claim 17, characterized in that, The choke bar is divided into a left region and a right region. The left region includes the left portion of the first horizontal plate, the left portion of the first vertical plate, the second vertical plate, and the second horizontal plate. The right region includes the right portion of the first horizontal plate, the right portion of the first vertical plate, the third vertical plate, and the third horizontal plate. The left-hand region is configured as a choke region for receiving left-hand circularly polarized patch antennas in the first and second patch antennas. The right-hand region is configured as a choke region for receiving right-hand circularly polarized patch antennas in the first and second patch antennas.

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