Antenna

Abstract

An antenna is provided. The antenna according to one aspect of the present invention comprises: a transmission layer; a first substrate arranged below the transmission layer; a reception layer arranged below the first substrate; a second substrate arranged below the reception layer; a ground layer arranged below the second substrate; a third substrate arranged below the ground layer; a power supply layer arranged below the third substrate; a transmission probe, which connects the transmission layer and the power supply layer in the vertical direction and sequentially penetrates the first substrate, the reception layer, the second substrate and the ground layer; a reception probe, which connects the reception layer and the power supply layer in the vertical direction and sequentially penetrates the second substrate and the ground layer; and a shorting via, which connects the reception layer and the ground layer in the vertical direction, penetrates the second substrate, and is arranged to be adjacent to the transmission probe in the horizontal direction.

Description

antenna

[0001] The present invention relates to an antenna. More specifically, it relates to an antenna for satellite communications.

[0002] Recently, wireless communication systems utilizing not only LTE communication technology but also 5G communication technology have been commercialized, providing various services.

[0003] Wireless communication services are increasingly utilizing mobile broadband services, and the trend toward utilizing satellite communications for this purpose is rapidly increasing. Satellite communication antennas are primarily used in satellites, UAVs, drones, and mobile devices. Satellite communication antennas require high gain, compactness, lightweight performance, multi-band, and multi-polarization capabilities.

[0004] Conventional satellite communication antennas operate on two platforms, with separate transmitter and receiver sections. While this design offers the advantages of simple design and high isolation between the transmitter and receiver, the separate platforms require a large amount of space.

[0005] This type of satellite communication antenna can be used for medium or large satellites, ships, large vehicles, etc., but it has the problem that it is not suitable for high-speed moving objects such as small satellites or drones, which are the main targets of recent satellite communication systems.

[0006] The problem that the present invention seeks to solve is to provide an antenna that can simultaneously implement a transmission function and a reception function with a single antenna.

[0007] In addition, a problem that the present invention seeks to solve is to provide an antenna that can improve space efficiency.

[0008] In addition, a problem that the present invention seeks to solve is to provide an antenna capable of increasing the isolation between a transmission layer and a reception layer.

[0009] According to an aspect of the present invention for achieving the above object, an antenna may include: a transmission layer; a first substrate disposed below the transmission layer; a reception layer disposed below the first substrate; a second substrate disposed below the reception layer; a ground layer disposed below the second substrate; a third substrate disposed below the ground layer; a feed layer disposed below the third substrate; a transmission probe vertically connecting the transmission layer and the feed layer and sequentially penetrating the first substrate, the reception layer, the second substrate, the ground layer, and the third substrate; a reception probe vertically connecting the reception layer and the feed layer and sequentially penetrating the second substrate, the ground layer, and the third substrate; and a shorting via vertically connecting the reception layer and the ground layer, penetrating the second substrate, and being horizontally adjacent to the transmission probe.

[0010] This allows for the simultaneous implementation of transmission and reception functions with a single antenna, thereby improving space efficiency.

[0011] In addition, the transmission layer may include a transmission radiating patch formed in a central region and a plurality of transmission parasitic patches arranged radially based on the transmission radiating patch, and the reception layer may include a reception radiating patch formed in a central region and a plurality of reception parasitic patches arranged radially based on the reception radiating patch.

[0012] In this case, the transmitting radiation arrangement may overlap the receiving radiation patch in the overall vertical direction, and the transmitting parasitic patch and the receiving parasitic patch may not overlap in the vertical direction.

[0013] In addition, the transmission layer may include a transmission radiation patch formed in a central region, and the transmission probe may include a first transmission probe having an upper end connected to the transmission radiation patch and a lower end connected to a first vertical feed section of the feed layer, and a second transmission probe having an upper end connected to the transmission radiation patch and a lower end connected to a first horizontal feed section of the feed layer.

[0014] In addition, the receiving layer may include a receiving radiation patch formed in a central region, and the receiving probe may include a first receiving probe having an upper end connected to the receiving radiation patch and a lower end connected to a second vertical feeding portion of the feeding layer, and a second receiving probe having an upper end connected to the receiving radiation patch and a lower end connected to a second horizontal feeding portion of the feeding layer.

[0015] In addition, the first vertical feed unit, the second vertical feed unit, the first horizontal feed unit, and the second horizontal feed unit may be radially arranged with respect to a central region of the feed layer, and the first vertical feed unit and the second vertical feed unit may be formed in a shape symmetrical to each other at a position symmetrical to each other with respect to the central region of the feed layer, and the first horizontal feed unit and the second horizontal feed unit may be formed in a shape symmetrical to each other at a position symmetrical to each other with respect to the central region of the feed layer.

[0016] In addition, the first transmitting probe, the first receiving probe, the second transmitting probe, and the second receiving probe may be radially arranged with respect to the central region of the feeding layer, and the first transmitting probe and the first receiving probe may be formed in a shape symmetrical to each other at a position symmetrical to each other with respect to the central region of the feeding layer, and the first receiving probe and the second receiving probe may be formed in a shape symmetrical to each other at a position symmetrical to each other with respect to the central region of the feeding layer.

[0017] Additionally, the feed layer may include a first transmission filter connected to the first vertical feed unit, a second transmission filter connected to the first horizontal feed unit, a first reception filter connected to the second vertical feed unit, and a second reception filter connected to the second vertical feed unit.

[0018] Through this, the isolation between the transmission layer and the reception layer can be increased.

[0019] Additionally, the receiving layer may include a first through hole penetrated by the first transmitting probe and a second through hole penetrated by the second transmitting probe, and a gap may exist between the first through hole and the first transmitting probe, and a gap may exist between the second through hole and the second transmitting probe.

[0020] Additionally, the shorting via may include a plurality of first shorting vias whose upper ends are positioned symmetrically with respect to the first transmission probe, and a plurality of second shorting vias whose upper ends are positioned symmetrically with respect to the second transmission probe.

[0021] Additionally, the feed layer may include a transmission feed unit connected to the transmission probe, a reception feed unit connected to the reception probe, a transmission filter connected to the transmission feed unit, and a reception filter connected to the reception feed unit.

[0022] In this case, the transmitting filter may extend in a direction perpendicular to the extension direction of the transmitting power supply unit, and the receiving filter may extend in a direction perpendicular to the extension direction of the receiving power supply unit.

[0023] Through this embodiment, an antenna capable of simultaneously implementing a transmission function and a reception function with a single antenna can be provided.

[0024] Additionally, the present embodiment can provide an antenna capable of improving space efficiency.

[0025] Additionally, the present embodiment can provide an antenna capable of increasing the isolation between a transmission layer and a reception layer.

[0026] FIG. 1 is a perspective view of an antenna according to one embodiment of the present invention.

[0027] Figure 2 is a cross-sectional view of an antenna according to one embodiment of the present invention.

[0028] FIG. 3 is a plan view of a transmission layer of an antenna according to one embodiment of the present invention.

[0029] FIG. 4 is a plan view of a receiving layer of an antenna according to one embodiment of the present invention.

[0030] FIG. 5 is a plan view of a feed layer of an antenna according to one embodiment of the present invention.

[0031] Figure 6 is an enlarged view of an area of ​​Figure 5.

[0032] Figure 7 is an enlarged view of an area of ​​Figure 5.

[0033] FIG. 8 is a graph showing S parameters according to frequency of an antenna according to one embodiment of the present invention.

[0034] FIG. 9 is a plan view of a feed layer of an antenna according to one embodiment of the present invention.

[0035] FIG. 10 is a graph showing S parameters according to frequency of an antenna according to one embodiment of the present invention.

[0036] Figures 11 to 13 are graphs showing the degree of mutual interference according to the frequency of an antenna according to one embodiment of the present invention.

[0037] Fig. 14 is a graph showing the Realized Gain of an antenna according to one embodiment of the present invention.

[0038] Figures 15 to 18 are graphs showing the radiation pattern of an antenna according to one embodiment of the present invention.

[0039] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

[0040] However, the technical idea of ​​the present invention is not limited to some of the embodiments described, but can be implemented in various different forms, and within the scope of the technical idea of ​​the present invention, one or more of the components between the embodiments can be selectively combined or substituted for use.

[0041] In addition, terms (including technical and scientific terms) used in the embodiments of the present invention may be interpreted as having a meaning that can be generally understood by a person of ordinary skill in the technical field to which the present invention belongs, unless explicitly and specifically defined and described, and terms that are commonly used, such as terms defined in a dictionary, may be interpreted in consideration of the contextual meaning of the relevant technology.

[0042] Additionally, the terms used in the embodiments of the present invention are intended to describe the embodiments and are not intended to limit the present invention.

[0043] In this specification, the singular may also include the plural unless specifically stated otherwise in the phrase, and when it is described as “A and / or at least one (or more) of B, C”, it may include one or more of all combinations that can be combined with A, B, C.

[0044] Additionally, in describing components of embodiments of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only intended to distinguish the components from other components, and are not intended to limit the nature, order, or sequence of the components.

[0045] And, when a component is described as being 'connected', 'coupled', or 'connected' to another component, it may include not only cases where the component is 'connected', 'coupled', or 'connected' directly to the other component, but also cases where the component is 'connected', 'coupled', or 'connected' by another component between the component and the other component.

[0046] Additionally, when described as being formed or arranged "above" or "below" each component, "above" or "below" includes not only cases where the two components are in direct contact with each other, but also cases where one or more other components are formed or arranged between the two components. Furthermore, when expressed as "above" or "below," the meaning may include not only the upward direction but also the downward direction based on one component.

[0047] Hereinafter, the present invention will be described in more detail with reference to the attached drawings.

[0048] FIG. 1 is a perspective view of an antenna according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of an antenna according to an embodiment of the present invention. FIG. 3 is a plan view of a transmission layer of an antenna according to an embodiment of the present invention. FIG. 4 is a plan view of a reception layer of an antenna according to an embodiment of the present invention. FIG. 5 is a plan view of a feed layer of an antenna according to an embodiment of the present invention. FIG. 6 is an enlarged view of a region of FIG. 5. FIG. 7 is an enlarged view of a region of FIG. 5.

[0049] Referring to FIGS. 1 to 7, an antenna (10) according to one embodiment of the present invention may include a transmission layer (100), a first substrate (200), a reception layer (300), a second substrate (400), a ground layer (500), a third substrate (600), and a feed layer (700), but may be implemented excluding some of these configurations, and additional configurations are not excluded.

[0050] The antenna (10) may be an antenna for satellite communication. The antenna (10) is formed by stacking a transmission layer (100) and a reception layer (300), thereby enabling simultaneous implementation of transmission and reception functions. The antenna (10) operates in dual bands and can increase isolation through a filter (720). In addition, the transmission layer and the reception layer may operate in vertical multi-polarization to reduce losses due to Faraday rotation and multi-path fading.

[0051] The antenna (10) may be an antenna used for 5G non-terrestrial network satellite communication. 3GPP (3 rdThe antenna (10) can operate at the 5G non-terrestrial frequency (Downlink: 1980-2010 MHz, Uplink: 2170-2200 MHz) specified in the 5G Generation Partnership Project. Four feed points can be applied to the antenna (10) to implement dual polarization of vertical polarization and horizontal polarization. The antenna (10) can operate through radiating patches (120, 320) operating at transmission frequencies and reception frequencies, and parasitic patches (130, 330) for bandwidth increase. A filter (720) can be applied for transmission and reception isolation of -30 dB or less. The filter (720) can be an interdigital bandpass filter. The antenna (10) can have a reflection coefficient bandwidth of -30 dB and a transmission / reception isolation performance of -35 dB or less at 1920-2030 MHz and 2150-2250 MHz, including 5G non-terrestrial satellite communication frequencies.

[0052] The transmission layer (100) may be placed on the first substrate (200). The transmission layer (100) may be a micro strip patch. The transmission layer (100) may perform a transmission function. The transmission layer (100) may include a transmission radiating patch (120) and a transmission parasitic patch (130). The transmission radiating patch (120) and the parasitic patch (130) may be formed of copper. When viewed from above, the transmission layer (100) may be formed in a rectangular shape. For example, the x-axis direction length (W1) of the transmission layer (100) may be 96 mm, and the y-axis direction length (L1) may be 96 mm.

[0053] The transmission radiation patch (120) may be formed in the central region of the transmission layer (100). The transmission radiation patch (120) may be formed in a cross shape when viewed from above. The transmission radiation patch (120) may have chamfers formed in each corner region. The transmission radiation patches (120) may be formed in shapes that are symmetrical to each other based on the central region of the transmission radiation patch (120).

[0054] With reference to FIG. 3, the transmitting radiation patch (120) may include an upper region, a central region positioned below the upper region, and a lower region positioned below the central region. The y-axis direction length (L4) of the upper region of the transmitting radiation patch (120) may be 13.25 mm. The y-axis direction length (L5) of the central region of the transmitting radiation patch (120) may be 18 mm. The y-axis direction length (L6) of the lower region of the transmitting radiation patch (120) may be 13.25 mm. The x-axis direction width (W4) excluding the chamfer of the upper region and the lower region of the transmitting radiation patch (120) may be 10 mm.

[0055] The transmission parasitic patch (130) may include a plurality of transmission parasitic patches (132, 134, 136, 138) that are radially arranged based on the transmission radiating patch (120). Referring to FIG. 3, the first transmission parasitic patch (132) may be arranged above the transmission radiating patch (120), the second transmission parasitic patch (134) may be arranged on the right side of the transmission radiating arrangement (120), the third transmission parasitic patch (136) may be arranged below the transmission radiating patch (120), and the fourth transmission parasitic patch (138) may be arranged on the left side of the transmission radiating patch (120). The first to fourth transmission parasitic patches (132, 134, 136, 138) may be formed in shapes that correspond to each other and may be arranged at positions that are symmetrical to each other based on the transmission radiating patch (120).

[0056] The first to fourth transmission parasitic patches (132, 134, 136, 138) may each be formed in a cross shape. The x-axis direction length (L2) of the central region of the first and third transmission parasitic patches (132, 136) may be 41 mm, and the x-axis direction lengths (L3) of the upper and lower regions may be 19 mm. The x-axis direction length (W3) of the central region of the second and fourth transmission parasitic patches (134, 138) may be 4 mm, and the x-axis direction lengths (W2) of the second and fourth transmission parasitic patches (134, 138) may be 9 mm.

[0057] The first substrate (200) may be placed below the transmission layer (100). The first substrate (200) may be placed above the reception layer (300). The height of the first substrate (200) may correspond to the height of the second substrate (400).

[0058] The first substrate (200) may include a first substrate unit (210), a second substrate unit (220) disposed below the first substrate unit (210), and a third substrate unit (230) disposed below the second substrate unit (220). The height of the first substrate unit (210) may be 0.76 mm. The heights of the second and third substrate units (220, 230) may each be 1.52 mm. For example, the first substrate unit (210), the second substrate unit (220), and the third substrate unit (230) may be applied with the RF-30 model from Tarconic, but are not limited thereto.

[0059] A first adhesive (212) may be placed between the first substrate unit (210) and the second substrate unit (220). A second adhesive (222) may be placed between the second substrate unit (220) and the third substrate unit (230). A third adhesive (232) may be placed between the third substrate unit (230) and the receiving layer (300).

[0060] The receiving layer (300) may be disposed below the first substrate (200). The receiving layer (300) may be disposed above the second substrate (400). The receiving layer (300) may be a micro strip patch. The receiving layer (300) may perform a receiving function. The receiving layer (300) may include a receiving radiating patch (320) and a receiving parasitic patch (330). The receiving radiating patch (320) and the receiving parasitic patch (330) may be formed of copper.

[0061] The receiving radiation patch (320) may be formed in the central region of the receiving layer (300). The receiving radiation patch (320) may be formed in a cross shape when viewed from above. Each corner region of the receiving radiation patch (320) may be formed at a right angle. The receiving radiation patch (320) may be formed in a shape that is symmetrical to each other based on the central region of the receiving radiation patch (320).

[0062] Based on Fig. 4, the x-axis direction length (W5) of the central region of the receiving radiation patch (320) may be 20.6 mm, and the x-axis direction length (W6) of the receiving radiation patch (320) may be 47.7 mm.

[0063] The receiving parasitic patch (330) may include a plurality of receiving parasitic patches (332, 334, 336, 338) that are radially arranged based on the receiving radiating patch (320). Referring to FIG. 4, the first receiving parasitic patch (332) may be arranged on the upper right side of the receiving radiating patch (320), the second receiving parasitic patch (334) may be arranged on the lower right side of the receiving radiating patch (320), the third receiving parasitic patch (336) may be arranged on the lower left side of the receiving radiating patch (320), and the fourth receiving parasitic patch (338) may be arranged on the upper left side of the receiving radiating patch (320). The first to fourth receiving parasitic patches (332, 334, 336, 338) may be formed in shapes that correspond to each other and may be arranged at positions that are symmetrical to each other based on the receiving radiating patch (320).

[0064] The first to fourth receiving parasitic patches (332, 334, 336, 338) may each be formed in an 'L' shape. The y-axis direction length (L7) of the fourth receiving parasitic patch (338) may be 17 mm. The y-axis direction length (L8) of the upper region of the fourth receiving parasitic patch (338) may be 14 mm. The y-axis direction length of the lower region of the fourth receiving parasitic patch (338) may be 3 mm.

[0065] The transmitting radiating patch (120) may overlap the receiving radiating patch (320) in the overall vertical direction. Specifically, the transmitting radiating patch (120) may overlap the receiving radiating patch (320) in the overall z-axis direction. The transmitting parasitic patch (130) may not overlap the receiving parasitic patch (330) in the vertical direction. Specifically, the transmitting parasitic patch (130) may not overlap the receiving parasitic patch (330) in the z-axis direction.

[0066] The second substrate (400) may be placed below the receiving layer (300). The second substrate (400) may be placed above the ground layer (500). The height of the second substrate (400) may correspond to the height of the first substrate (200).

[0067] The second substrate (400) may include a fourth substrate unit (410), a fifth substrate unit (420) disposed below the fourth substrate unit (410), and a sixth substrate unit (430) disposed below the fifth substrate unit (420). The height of the fourth substrate unit (410) may be 0.76 mm. The heights of the fifth and sixth substrate units (420, 430) may each be 1.52 mm. For example, the fourth substrate unit (410), the fifth substrate unit (420), and the sixth substrate unit (430) may be applied with the RF-30 model from Tarconic, but are not limited thereto.

[0068] A fourth adhesive (412) may be placed between the fourth substrate unit (410) and the fifth substrate unit (420). A fifth adhesive (422) may be placed between the fifth substrate unit (420) and the sixth substrate unit (430). A sixth adhesive (432) may be placed between the sixth substrate unit (430) and the ground layer (500).

[0069] The ground layer (500) may be disposed below the second substrate (400). The ground layer (500) may be disposed above the third substrate (600). The ground layer (500) may be disposed between the receiving layer (200) and the power supply layer (700). The ground layer (500) may be electrically connected to the receiving layer (200) through a shorting via (340). The ground layer (500) may be electrically connected to the power supply layer (700). The ground layer (500) may be electrically connected to the power supply layer (700) through a ground via (720). The ground layer (500) may be formed of a copper material.

[0070] The third substrate (600) may be placed below the ground layer (500). The third substrate (600) may be placed above the power supply layer (700). The height of the third substrate (600) may be smaller than the height of the first substrate (200). The height of the third substrate (600) may be smaller than the height of the second substrate (200). The height of the third substrate (600) may be 0.76 mm. The third substrate (600) may be applied to the RF-30 model of Tarconic, but is not limited thereto.

[0071] The third substrate (600) may include a plurality of via holes (610) extending in the vertical direction (z-axis direction) and spaced apart in the horizontal direction (x-axis or y-axis direction). Each of the plurality of via holes (610) may be penetrated by a ground via (730).

[0072] The power supply layer (700) may be positioned below the third substrate (600). The power supply layer (700) may be electrically connected to the transmission layer (100) via the transmission probe (110). The power supply layer (700) may be electrically connected to the reception layer (300) via the reception probe (310). The power supply layer (700) may be electrically connected to the ground layer (500) via the ground via (730).

[0073] With reference to FIG. 5, the feed layer (700) may include a first vertical feed unit (712) and a second vertical feed unit (716) extending in the vertical direction, and a first horizontal feed unit (714) and a second horizontal feed unit (418) extending in the horizontal direction. The first vertical feed unit (712) and the second vertical feed unit (716) may overlap in the y-axis direction. The first horizontal feed unit (714) and the second horizontal feed unit (418) may overlap in the x-axis direction. The first vertical feed unit (712), the first horizontal feed unit (714), the second vertical feed unit (716), and the second horizontal feed unit (718) may be formed in shapes corresponding to each other, and may be arranged at positions symmetrical to each other with respect to the central region of the feed layer (700). The first vertical feed unit (712), the first horizontal feed unit (714), the second vertical feed unit (716), and the second horizontal feed unit (718) can be radially arranged based on the central region of the feed layer (700). Through this, dual polarization of both vertical polarization and horizontal polarization can be implemented.

[0074] Here, the first vertical feeder (712) and the first horizontal feeder (714) may be referred to as transmitting feeders (712, 714), and the second vertical feeder (716) and the second horizontal feeder (718) may be referred to as receiving feeders (716, 718).

[0075] The feed layer (700) may include a transmit filter (722, 724) connected to a transmit feed unit (712, 714) and a receive filter (726, 728) connected to a receive feed unit (716, 718). The transmit filter (722, 724) may extend in a direction perpendicular to the extension direction of the transmit feed unit (712, 714), and the receive filter (726, 728) may extend in a direction perpendicular to the extension direction of the receive feed unit (716, 718).

[0076] Based on Fig. 5, the distance (d3) between the outermost ground vias (730) may be 68 mm, and the distance (d4) between adjacent ground vias (730) may be 4 mm. In addition, the y-axis direction length (L9) of the area where the first vertical feed unit (712), the first horizontal feed unit (714), the second vertical feed unit (716), and the second horizontal feed unit (718) are arranged may be 52 mm.

[0077] The transmission probe (110) can electrically connect the transmission layer (100) and the feed layer (700). The transmission probe (110) can vertically connect the transmission layer (100) and the feed layer (700). The transmission probe (110) can extend in the vertical direction or the z-axis direction. The transmission probe (110) can sequentially penetrate the first substrate (200), the receiving layer (300), the second substrate (400), the ground layer (500), and the third substrate (600).

[0078] The transmitting probe (110) may include a first transmitting probe (114) having an upper end connected to the transmitting radiation patch (120) and a lower end connected to the first vertical feeding portion (712) of the feeding layer (700), and a second transmitting probe (112) having an upper end connected to the transmitting radiation patch (120) and a lower end connected to the first horizontal feeding portion (714) of the feeding layer (700).

[0079] Based on Fig. 3, the distance (d1) between the second transmission probe (114) and the right end of the transmission radiation patch (120) may be 14.85 mm.

[0080] The receiving layer (300) may include a through hole (350) penetrated by the transmitting probe (110). The receiving layer (300) may include a first through hole (354) penetrated by the first transmitting probe (114) and a second through hole (352) penetrated by the second transmitting probe (112). A gap may exist between the first through hole (354) and the first transmitting probe (114), and a gap may exist between the second through hole (352) and the second transmitting probe (112).

[0081] The receiving probe (310) can electrically connect the receiving layer (300) and the feeding layer (700). The receiving probe (310) can vertically connect the receiving layer (300) and the feeding layer (700). The receiving probe (310) can extend in the vertical direction or the z-axis direction. The receiving probe (310) can sequentially penetrate the second substrate (400), the ground layer (500), and the third substrate (600).

[0082] The receiving probe (310) may include a first receiving probe (314) having an upper end connected to a receiving radiating patch (320) and a lower end connected to a second vertical feeding portion (716) of a feeding layer (700), and a second receiving probe (312) having an upper end connected to a receiving radiating patch (320) and a lower end connected to a second horizontal feeding portion (718) of a feeding layer (700).

[0083] Based on Fig. 4, the distance (d2) between the second receiving probe (314) and the lower end of the transmitting radiation patch (320) may be 13.85 mm.

[0084] The first transmitting probe (114) and the first receiving probe (314), the second transmitting probe (112) and the second receiving probe (312) are arranged radially from each other with respect to the central region of the power supply layer (700), and the first transmitting probe (114) and the first receiving probe (314) are formed in a shape that is symmetrical to each other at a position that is symmetrical to each other with respect to the central region of the power supply layer (700), and the first receiving probe (314) and the second receiving probe (312) are formed in a shape that is symmetrical to each other at a position that is symmetrical to each other with respect to the central region of the power supply layer (700).

[0085] The shorting via (340) can vertically connect the receiving layer (300) and the ground layer (500). The shorting via (340) can connect the receiving layer (300) and the ground layer (500) in the z-axis direction. The shorting via (340) can electrically connect the receiving layer (300) and the ground layer (500). The shorting via (340) can penetrate the second substrate (400). The shorting via (340) can be arranged adjacent to the transmitting probe (310).

[0086] The shorting via (340) may include a plurality of first shorting vias (342, 344) whose upper ends are arranged at positions symmetrical with respect to the first transmission probe (114), and a plurality of second shorting vias (346, 348) whose upper ends are arranged at positions symmetrical with respect to the second transmission probe (112). For example, referring to FIG. 4, the upper ends of the plurality of first shorting vias (342, 344) may be arranged above and below the first transmission probe (114), respectively, and the upper ends of the plurality of second shorting vias (346, 348) may be arranged on the left and right sides of the second transmission probe (112), respectively.

[0087] Referring to FIG. 5, the feed layer (700) may include a first transmission filter (722) connected to the first vertical feed unit (712), a second transmission filter (724) connected to the first horizontal feed unit (714), a first reception filter (726) connected to the second vertical feed unit (716), and a second reception filter (728) connected to the second horizontal feed unit (718). Through this, the isolation of the transmission layer (100) and the reception layer (300) may be increased.

[0088] Referring to FIG. 6, the first vertical feeding unit (712) may include a first feeding point (7124) connected to the first transmitting probe (114) and a second feeding port (7122) positioned in an opposite region of the first feeding point (7124). The x-axis direction length (W8) of the first vertical feeding unit (712) may be 1.9 mm.

[0089] The first transmission filter (722) may include first to third filter units (7222, 7224, 7226) spaced apart in the y-axis direction. The first to third filter units (7222, 7224, 7226) may each extend in the x-axis direction. The x-axis direction length (W7) of the first and third filter units (7222, 7226) may be 23.7 mm. The x-axis direction length (W10) of the second filter unit (7224) may be 23.2 mm. The x-axis direction distance (W9) between one end of the first and third filter units (7222, 7226) and the first vertical feed portion (712) may be 19.8 mm. The y-axis direction length (L10) of the first filter unit and the third filter unit (7222, 7226) may be 1.8 mm. The y-axis direction length (L11) of the second filter unit (7224) may be 1.5 mm. The distance (d5) between the first filter unit (7222) and the second filter unit (7224) may be 2.1 mm.

[0090] Referring to FIG. 7, the second vertical feeding portion (716) may include a third feeding point (7164) connected to the first receiving probe (314) and a fourth feeding port (7162) positioned in an opposite area of ​​the third feeding point (7164). The x-axis direction length (L14) of the second vertical feeding portion (716) may be 1.9 mm.

[0091] The first receiving filter (726) may include fourth to sixth filter units (7262, 7264, 7266) spaced apart in the y-axis direction. The fourth to sixth filter units (7262, 7264, 7266) may each extend in the x-axis direction. The x-axis length (L12) of the fourth filter unit and the fifth filter unit (7262, 7266) may be 21.2 mm. The x-axis length (L15) of the fifth filter unit (7264) may be 20.8 mm. The x-axis distance (L13) between one end of the fourth filter unit and the sixth filter unit (7262, 7266) and the second vertical feeder (716) may be 17.9 mm. The y-axis direction length (W11) of the fourth filter unit and the sixth filter unit (7262, 7266) may be 1.7 mm. The y-axis direction length (W12) of the fifth filter unit (7264) may be 1.5 mm. The distance (d6) between the fourth filter unit (7262) and the fifth filter unit (7264) may be 2.2 mm.

[0092] FIG. 8 is a graph showing S parameters according to frequency of an antenna according to one embodiment of the present invention.

[0093] Referring to Fig. 8, the dotted line graph represents the S parameter in the case where there is no shorting via (340), and the solid line graph represents the S parameter in the case where there is a shorting via (340). Here, Fig. 8 represents experimental data obtained when the filter (720) is removed in one embodiment of the present invention.

[0094] In the case of horizontally feeding the receiving layer (300), it can be seen that it operates in the downlink frequency (1980-2010MHz) region regardless of the presence or absence of the shorting via (340). In contrast, in the case of horizontally feeding the receiving layer (100), it can be seen that impedance matching is not achieved in the uplink frequency (2170-2200MHz) region if the shorting via (340) is not present. That is, the antenna (10) according to one embodiment of the present invention can be made to operate in the uplink frequency (2170-2200MHz) region due to the presence of the shorting via (340).

[0095] Fig. 9 is a plan view of a feed layer of an antenna according to one embodiment of the present invention. Referring to Fig. 9, it can be seen that a filter (720) has been removed from the feed layer (700).

[0096] FIG. 10 is a graph showing S parameters according to frequency of an antenna according to one embodiment of the present invention.

[0097] Referring to Fig. 10, the impedance bandwidth can be determined depending on the presence or absence of the filter (720). In the case of the receiving layer (300), the impedance bandwidth below -10 dB increases by approximately 30 MHz from 1950-2040 MHz to 1920-2040 MHz, and in the case of the transmitting layer (100), the impedance bandwidth is almost the same. In other words, it can be seen that the presence or absence of the filter (720) does not affect the operation of the antenna (10).

[0098] Figures 11 to 13 are graphs showing the degree of mutual interference according to the frequency of an antenna according to one embodiment of the present invention.

[0099] Referring to FIGS. 11 to 13, the degree of mutual interference between the transmission layer (100) and the reception layer (300) depending on the presence or absence of the filter (720) can be confirmed. FIG. 11 shows the mutual interference between the same polarization feeders in different frequency bands, FIG. 12 shows the mutual interference between the horizontal polarization feeders and the vertical polarization feeders in the same frequency band, and FIG. 13 shows the mutual interference between the horizontal polarization feeders and the vertical polarization feeders in different frequency bands. When the filter (720) between the same polarization feeders does not exist, it can be seen that it is at the level of -10.54 dB to -11.7 dB in the transmission frequency band and -10.7 dB to -12.1 dB in the reception frequency band. When the filter (720) is applied, it can be seen that it is reduced by about 24 dB to a maximum of -36 dB and -41 dB in the transmission and reception frequency bands, respectively. It can be seen that the mutual interference between the vertical polarization feeder and the horizontal polarization feeder in the same frequency band is not affected by the filter (720). In the case of Fig. 13, even if the filter (720) does not exist, it can be seen that the isolation characteristic is -28 dB or less due to different polarizations, and when the filter (720) exists, it has an isolation characteristic of -37 dB or less, which is reduced by about 9 dB.

[0100] That is, in the antenna (10) according to one embodiment of the present specification, the isolation between the transmission frequency and the reception frequency band can be increased due to the filter (720).

[0101] Fig. 14 is a graph showing the Realized Gain of an antenna according to one embodiment of the present invention.

[0102] Referring to Fig. 14, it can be seen that the gain is distributed at 5.87-5.95 dBi and 6.48-6.52 dBi in the transmission frequency band and the reception frequency band, respectively. In other words, it can be seen that the operation is the same as that of a general antenna.

[0103] Figures 15 to 18 are graphs showing the radiation pattern of an antenna according to one embodiment of the present invention.

[0104] Referring to FIGS. 15 to 18, it can be seen that the antenna radiation pattern within the operating frequency band has excellent symmetry with respect to the normal axis and a half-power beam width of at least 80 degrees. In other words, the radiation pattern of a typical antenna can be implemented.

[0105] According to an antenna (10) according to one embodiment of the present specification, it is possible to implement the functions of a general antenna, while also implementing reception and transmission functions in one antenna (10).

[0106] Although the embodiments of the present invention have been described with reference to the attached drawings, those skilled in the art will appreciate that the present invention can be implemented in other specific forms without altering the technical concept or essential features thereof. Therefore, the embodiments described above should be understood to be illustrative in all respects and not restrictive.

Claims

1. Transmission layer; A first substrate disposed below the above transmission layer; A receiving layer disposed below the first substrate; A second substrate disposed below the above receiving layer; A ground layer disposed below the second substrate; A third substrate disposed below the above ground layer; A power supply layer disposed below the third substrate; A transmission probe that vertically connects the transmission layer and the power supply layer and sequentially penetrates the first substrate, the reception layer, the second substrate, the ground layer, and the third substrate; A receiving probe that vertically connects the receiving layer and the feeding layer and sequentially penetrates the second substrate, the ground layer, and the third substrate; and An antenna including a shorting via that vertically connects the receiving layer and the ground layer, penetrates the second substrate, and is horizontally adjacent to the transmitting probe.

2. In paragraph 1, The above transmission layer includes a transmission radiating patch formed in a central region and a plurality of transmission parasitic patches arranged radially based on the transmission radiating patch, The above receiving layer includes a receiving radiating patch formed in a central region and a plurality of receiving parasitic patches arranged radially based on the receiving radiating patch, An antenna in which the above transmitting radiating arrangement overlaps the above receiving radiating patch in the overall vertical direction, and the transmitting parasitic patch and the receiving parasitic patch do not overlap in the vertical direction.

3. In paragraph 1, The above transmission layer includes a transmission radiating patch formed in the central region, An antenna comprising a first transmit probe having an upper end connected to the transmit radiating patch and a lower end connected to the first vertical feed section of the feed layer, and a second transmit probe having an upper end connected to the transmit radiating patch and a lower end connected to the first horizontal feed section of the feed layer.

4. In paragraph 3, The above receiving layer includes a receiving radiating patch formed in the central region, An antenna comprising a first receiving probe having an upper end connected to the receiving radiating patch and a lower end connected to a second vertical feeding section of the feeding layer, and a second receiving probe having an upper end connected to the receiving radiating patch and a lower end connected to a second horizontal feeding section of the feeding layer.

5. In paragraph 4, The first vertical power supply unit, the second vertical power supply unit, the first horizontal power supply unit, and the second horizontal power supply unit are arranged radially from each other based on the central area of ​​the power supply layer, Based on the central area of ​​the above-mentioned feeding layer, the first vertical feeding unit and the second vertical feeding unit are formed in a shape symmetrical to each other at a position symmetrical to each other, An antenna in which the first horizontal feeding portion and the second horizontal feeding portion are formed in symmetrical shapes at positions symmetrical to each other based on the central area of ​​the feeding layer.

6. In paragraph 4, The first transmitting probe, the first receiving probe, the second transmitting probe, and the second receiving probe are arranged radially from each other with respect to the central region of the feeding layer, Based on the central area of ​​the above power supply layer, the first transmitting probe and the first receiving probe are formed in a shape symmetrical to each other at a position symmetrical to each other, An antenna in which the first receiving probe and the second receiving probe are formed in a symmetrical shape at a position symmetrical to each other based on the central area of ​​the above-mentioned feeding layer.

7. In paragraph 4, An antenna wherein the feed layer includes a first transmit filter connected to the first vertical feed section, a second transmit filter connected to the first horizontal feed section, a first receive filter connected to the second vertical feed section, and a second receive filter connected to the second vertical feed section.

8. In paragraph 3, The receiving layer includes a first through hole penetrated by the first transmitting probe and a second through hole penetrated by the second transmitting probe, An antenna in which a gap exists between the first through hole and the first transmission probe, and a gap exists between the second through hole and the second transmission probe.

9. In paragraph 3, An antenna including a plurality of first shorting vias, the upper ends of which are arranged at positions symmetrical with respect to the first transmitting probe, and a plurality of second shorting vias, the upper ends of which are arranged at positions symmetrical with respect to the second transmitting probe.

10. In paragraph 2, The above power supply layer includes a transmission power supply unit connected to the transmission probe, a reception power supply unit connected to the reception probe, a transmission filter connected to the transmission power supply unit, and a reception filter connected to the reception power supply unit. The above transmission filter extends in a direction perpendicular to the extension direction of the above transmission power supply unit, The above receiving filter is an antenna that extends in a direction perpendicular to the extension direction of the receiving power supply.

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