Antenna structure and antenna device

Abstract

This antenna structure comprises: a main radiation unit comprising a main radiator, a signal pad, and an intermediate unit connecting the main radiator and the signal pad and having an intermediate slot; and a dummy radiation unit adjacent to the main radiation unit and comprising a dummy radiator having a dummy slot. This antenna device comprises a housing and an antenna structure accommodated in the housing.

Description

Antenna structure and antenna device

[0001] The present invention relates to an antenna structure and an antenna device. More specifically, the present invention relates to an antenna structure comprising a radiator and an antenna device comprising the same.

[0002] With the recent development of the information society, wireless communication technologies such as Wi-Fi and Bluetooth are being applied to or embedded in image display devices, electronic devices, and buildings. With the recent evolution of mobile communication technology, antennas for performing communication in high-frequency or ultra-high-frequency bands are being applied to public transportation such as buses and subways, building structures, and various mobile devices.

[0003] In high-frequency bands such as 5G communication, signal loss occurs easily, so repeater antennas or router antennas can be used to mediate or transmit signals. Generally, in router antennas, antennas can be combined in the form of protruding bars within a housing containing circuit elements.

[0004] However, the above-mentioned protruding bar-shaped antennas are easily damaged by external physical impact, and a radiator design for realizing desired radiation characteristics may not be easily implemented.

[0005] In addition, even if the antenna is contained within the housing, signal loss in the high-frequency band can easily occur depending on the surrounding environment.

[0006] One objective of the present invention is to provide an antenna structure having improved radiation characteristics and radiation reliability.

[0007] One objective of the present invention is to provide an antenna device comprising an antenna structure having improved radiation characteristics and radiation reliability.

[0008] 1. An antenna structure comprising: a main radiator, a signal pad, and a main radiator including a mediating section connecting the main radiator and the signal pad and having a mediating slot; and a dummy radiator including a dummy radiator adjacent to the main radiator and having a dummy slot.

[0009] 2. An antenna structure, wherein the above-mentioned intermediary comprises a first intermediary connected to the signal pad and a second intermediary between the main radiator and the first intermediary, and the intermediary slot is formed in the second intermediary.

[0010] 3. An antenna structure according to 2 above, wherein the intermediary part further comprises a protrusion disposed between the first intermediary part and the second intermediary part.

[0011] 4. An antenna structure according to 1 above, wherein the intermediate slot has a closed opening shape limited within the intermediate section.

[0012] 5. In the above 1, the dummy radiator comprises a first dummy radiator part including an inclined side and a second dummy radiator part extending from the first dummy radiator part, and

[0013] The antenna structure comprises a dummy slot formed in the first dummy radiator part and a second dummy slot formed in the second dummy radiator part.

[0014] 6. An antenna structure according to 5, wherein the first dummy slot and the second dummy slot are integrally connected, and the dummy slot has a bent line shape.

[0015] 7. An antenna structure according to 1 above, wherein the dummy slot has a closed opening shape limited within the dummy radiator.

[0016] 8. An antenna structure according to 1 above, wherein the dummy radiator further comprises a dummy intermediary connected to the dummy radiator, and a ground portion connected to the dummy intermediary and disposed adjacent to the signal pad.

[0017] 9. An antenna structure according to 8, wherein the ground portion has a recess into which the signal pad of the main radiating portion is inserted.

[0018] 10. An antenna structure according to 9, wherein at least a portion of the mediating portion is inserted into the recess together with the signal pad.

[0019] 11. An antenna structure according to 8, wherein the main radiator has a shape bent from the intermediate section, and the dummy radiator has a shape bent from the dummy intermediate section in the opposite direction to the main radiator.

[0020] 12. In the above 1, the main radiator is an antenna structure including a radiating slot.

[0021] 13. An antenna structure according to 12, wherein the main radiator comprises a first radiator portion connected to the intermediate portion and including an inclined side, and a second radiator portion extending from the first radiator portion.

[0022] 14. An antenna structure according to 13, wherein the radiation slot comprises a first radiation slot formed in the first radiator part and a second radiation slot formed in the second radiator part.

[0023] 15. An antenna structure according to 14, wherein the first radiating slot and the second radiating slot are integrally connected, and the radiating slot has a bent line shape.

[0024] 16. An antenna structure according to 13 above, wherein the second radiator part includes an opening.

[0025] 17. An antenna structure according to 16, wherein the opening comprises a first opening having a closed opening shape and a second opening having an open opening shape.

[0026] 18. An antenna device comprising a housing; and the antenna structure described above accommodated within the housing.

[0027] 19. An antenna device according to 18, wherein the housing comprises an upper case and a lower case, and the antenna structure is attached to the inner upper surface of the upper case.

[0028] 20. An antenna device according to 19, further comprising a heat sink and a circuit board disposed between the antenna structure and the lower case.

[0029]

[0030] According to exemplary embodiments, the antenna structure may include a main radiation structure comprising an intermediary and a radiator, and a dummy radiation structure. The dummy radiation structure can shield or suppress signal loss and noise to the main radiation structure while stably securing coverage of the target frequency.

[0031] According to exemplary embodiments, the intermediate part of the main radiation structure and the dummy radiator of the dummy radiation structure may each include a slot. Through impedance matching through the slot, radiation characteristics in, for example, the 5G high-frequency band can be stably secured.

[0032] The above antenna structure can be applied internally to a relay antenna device, such as a router device, to provide stable radiation characteristics and radiation reliability against external noise and external shock.

[0033]

[0034] FIG. 1 is a schematic plan view showing an antenna structure according to exemplary embodiments.

[0035] FIG. 2 is a schematic plan view showing an antenna structure according to exemplary embodiments.

[0036] FIG. 3 is a schematic plan view showing an antenna structure according to exemplary embodiments.

[0037] FIG. 4 is a schematic exploded perspective view showing the housing of an antenna device according to exemplary embodiments.

[0038] FIG. 5 is a schematic plan view showing an antenna structure according to Comparative Example 1.

[0039] FIG. 6 is a schematic plan view showing an antenna structure according to Comparative Example 2.

[0040] Figure 7 is a graph showing the radiation characteristics of an antenna structure according to the examples and comparative examples.

[0041]

[0042] Embodiments of the present invention provide an antenna structure comprising a main radiating member and a dummy radiating member. Embodiments of the present invention provide an antenna device comprising a housing and an antenna structure embedded within the housing.

[0043] Embodiments of the present invention will be described in more detail below with reference to the drawings. However, the following drawings attached to this specification are intended to illustrate preferred embodiments of the present invention and serve to further enhance understanding of the technical concept of the present invention together with the aforementioned description; therefore, the present invention should not be interpreted as being limited only to the matters described in such drawings.

[0044] Terms used in this application, such as "first," "second," "third," "first end," "other end," "upper side," "side side," "lower side," etc., do not limit absolute positions or order, but are used in a relative sense to distinguish different components or parts.

[0045] FIG. 1 is a schematic plan view showing an antenna structure according to exemplary embodiments.

[0046] In FIG. 1, the first direction and the second direction may refer to two directions that intersect each other while being parallel to the upper surface of the dielectric layer (100). According to exemplary embodiments, the first direction and the second direction may be perpendicular to each other. For example, the first direction may be referred to as a horizontal direction or a length direction. The second direction may be referred to as a vertical direction or a width direction.

[0047] In this specification, the direction opposite to the direction indicated by the arrow may also be described as the same first direction and second direction.

[0048] Referring to FIG. 1, the antenna structure may include a main radiator (MRP) and a dummy radiator (160). The main radiator (MRP) and the dummy radiator (160) may be placed on a dielectric layer (100).

[0049] The dielectric layer (100) may be provided as a supporting film or substrate layer of the radiating portions. The dielectric layer (100) may include a transparent resin material. For example, the dielectric layer (100) may include a polyester resin such as polyethylene terephthalate, polyethylene isophthalate, polyethylene naphthalate, or polybutylene terephthalate; a cellulose resin such as diacetylcellulose or triacetylcellulose; a polycarbonate resin; an acrylic resin such as polymethyl (meth)acrylate or polyethyl (meth)acrylate; a styrene resin such as polystyrene or acrylonitrile-styrene copolymer; a polyolefin resin such as polyethylene, polypropylene, a polyolefin having a cyclo- or norbornene structure, or an ethylene-propylene copolymer; a vinyl chloride resin; an amide resin such as nylon or aromatic polyamide; an imide resin; a polyethersulfone resin; or a sulfone resin. It may include polyetheretherketone resins; polyphenylene sulfide resins; vinyl alcohol resins; vinylidene chloride resins; vinyl butyral resins; allylate resins; polyoxymethylene resins; epoxy resins; urethane or acrylicurethane resins; silicone resins, etc. These may be used alone or in combination of two or more.

[0050] In some embodiments, a pressure-sensitive adhesive film such as an optically clear adhesive (OCA) or an optically clear resin (OCR) may also be included in the dielectric layer (100).

[0051] In some embodiments, the dielectric layer (100) may include an inorganic insulating material such as silicon oxide, silicon nitride, silicon oxynitride, glass, etc.

[0052] In one embodiment, the dielectric layer (100) may be provided as substantially a single layer.

[0053] In some embodiments, the dielectric layer (100) may include a multilayer structure of at least two layers. For example, the dielectric layer (100) may include a substrate layer and an antenna dielectric layer, and may include a point adhesive layer between the substrate layer and the antenna dielectric layer. In one embodiment, the substrate layer may be a protective film.

[0054] An impedance or inductance for the main radiating unit (MRP) is formed by the dielectric layer (100), so that the frequency band that the main radiating unit (MRP) can drive or sense can be adjusted. In some embodiments, the dielectric constant of the dielectric layer (100) can be adjusted to a range of about 1.5 to 12. If the dielectric constant exceeds about 12, the driving frequency is reduced excessively, so driving in the high frequency band may not be implemented.

[0055] The main radiating unit (MRP) may include a main radiator (130), an intermediate unit (120), and a signal pad (110). The main radiator (130) may have a shape that is bent from the intermediate unit (120). For example, the main radiator (130) may extend in the first direction.

[0056] In some embodiments, the main radiator (130) may include a first radiator section (130a) that is directly connected to the intermediate section (120) and includes an inclined side, and a second radiator section (130b) that extends from the first radiator section (130a). For example, the first radiator section (130a) may have a width (width in the second direction) that increases as it moves away from the intermediate section (120) along the first direction. The first radiator section (130a) and the second radiator section (130b) may be connected to each other as a single member.

[0057] For example, the main radiator (130) can have a variable width overall by means of the first radiator part (130a) and the second radiator part (130b). Thus, a desired target frequency range band can be uniformly covered.

[0058] The intermediary section (120) may include a first intermediary section (122) adjacent to the signal pad (110), and a second intermediary section (124) connecting the first intermediary section (122) and the first radiator section (130a).

[0059] A signal pad (110) may be formed at the end of the first intermediate section (122). The first intermediate section (122) may have a width greater than that of the signal pad (110) (width in the first direction). In some embodiments, the first intermediate section (122) may include a portion whose width gradually increases from the signal pad (110).

[0060] In one embodiment, the first mediating part (122) and the signal pad (110) may be provided as a single member connected integrally.

[0061] The signal pad (110) may refer to a power supply unit assigned to the end of the intermediate unit (120). For example, the end of the power supply cable may be connected to the signal pad (110) by welding. Accordingly, power may be supplied through the power supply cable to power supply from the signal pad (110) through the intermediate unit (120) to the main radiator (130).

[0062] In some embodiments, the second intermediate section (124) may have a greater width than the first intermediate section (122). In one embodiment, as shown in FIG. 1, a protrusion (125) may be formed between the first intermediate section (122) and the second intermediate section (124). The protrusion (125) may protrude from the side of the intermediate section (120) in the first direction.

[0063] For example, the part adjacent to the signal pad (110) based on the protrusion (125) may be defined as the first intermediate part (122), and the part adjacent to the main radiator (130) may be defined as the second intermediate part (124).

[0064] According to embodiments of the present invention, an intermediary slot (IS) may be included within the intermediary section (120). According to exemplary embodiments, the intermediary slot (IS) may be included in the second intermediary section (124).

[0065] Impedance matching between the signal pad (110) and the main radiator (130) can be implemented through the intermediate slot (IS). For example, current bypass or path change from the intermediate section (120) can be implemented, and overall impedance matching at the main radiator (MRP) can be implemented.

[0066] Therefore, signal loss due to impedance mismatch can be prevented while improving radiation reliability in the target frequency band. The intermediate slot (IS) may have a closed opening shape that is substantially and completely contained within the intermediate section (120). Accordingly, power loss and interruption of current flow caused by the formation of the intermediate slot (IS) can be prevented.

[0067] The dummy radiating section (160) may include a dummy radiator (150), a dummy intermediate section (145), and a ground section (140). The dummy radiating section (160) may be physically separated from the main radiating section (MRP) as a whole.

[0068] In some embodiments, the dummy radiator (150), dummy intermediate (145), and ground (140) may be provided as a single member substantially connected as a single unit.

[0069] The ground portion (140) may have a shape that surrounds the first intermediary portion (122) and the signal pad (110). Accordingly, the ground portion (140) can block feed noise concentrated around the signal pad (110) and improve the signal efficiency transmitted to the intermediary portion (120).

[0070] The ground portion (140) has a bent pattern shape and may include a recess into which at least a portion of the signal pad (110) and the intermediate portion (120) is inserted. In one embodiment, the first intermediate portion (122) may be inserted into the recess together with the signal pad (110).

[0071] The dummy intermediate section (145) can extend from one side of the ground section (140). The dummy intermediate section (145) is adjacent to the second intermediate section (124) in the first direction and can extend in the second direction.

[0072] In some embodiments, the dummy intermediary (145) may be substantially parallel to the second intermediary (124).

[0073] The dummy radiator (150) may have a shape that is bent from the dummy intermediate section (145). The dummy radiator (150) may extend in the first direction but be bent in the opposite direction to the main radiator (MRP).

[0074] In some embodiments, the dummy radiator (150) may include a first dummy radiator section (150a) that is directly connected to the dummy intermediate section (145) and includes an inclined side, and a second dummy radiator section (150b) that extends from the first dummy radiator section (150a). For example, the first dummy radiator section (150a) may have a width (width in the second direction) that increases as it moves away from the dummy intermediate section (145) along the first direction. The first dummy radiator section (150a) and the second dummy radiator section (150b) may be connected to each other as a single member.

[0075] For example, the dummy radiator (150) can have a variable width overall due to the first dummy radiator part (150a) and the second dummy radiator part (150b). Accordingly, compatibility with the shape of the main radiator (MRP) is enhanced, allowing for stable coverage of the desired target frequency range band.

[0076] According to embodiments of the present invention, the dummy radiator (150) may include a dummy slot (DS). The dummy slot (DS) may have a bent line shape and may have a closed opening shape that is completely contained within the dummy radiator (150).

[0077] In some embodiments, the dummy slot (DS) may extend across the first dummy radiator section (150a) and the second dummy radiator section (150b). The dummy slot (DS) may include a first dummy slot section (DS1) formed within the first dummy radiator section (150a) and a second dummy slot section (DS2) formed within the second dummy radiator section (150b).

[0078] The first dummy slot section (DS1) and the second dummy slot section (DS2) may be provided as a single slot connected integrally with each other. The first dummy slot section (DS1) extends along the inclined side of the first dummy radiator section (150a), and the second dummy slot section (DS2) may have a line shape that is bent from the first dummy slot section (DS1).

[0079] The electric field transfer or electric field concentration to the dummy radiator (150) can be reduced by the dummy slot (DS). Thus, the radiation concentration at the main radiator (130) is enhanced, and signal loss can be further reduced.

[0080] In some embodiments, the length or area of ​​the main radiator (130) may be larger than the length or area of ​​the dummy radiator (150).

[0081] The main spinning unit (MRP) and the dummy spinning unit (160) may comprise silver (Ag), gold (Au), copper (Cu), aluminum (Al), platinum (Pt), palladium (Pd), chromium (Cr), titanium (Ti), tungsten (W), niobium (Nb), tantalum (Ta), vanadium (V), iron (Fe), manganese (Mn), cobalt (Co), nickel (Ni), zinc (Zn), tin (Sn), molybdenum (Mo), calcium (Ca), or an alloy containing at least one of these. These may be used alone or in combination of two or more.

[0082] In one embodiment, the main radiator (MRP) and the dummy radiator (160) may include silver (Ag) or a silver alloy (e.g., silver-palladium-copper (APC) alloy) or copper (Cu) or a copper alloy (e.g., copper-calcium (CuCa) alloy) for low resistance implementation and fine line width patterning.

[0083] In some embodiments, the main spinning section (MRP) and the dummy spinning section (160) may be substantially composed of the metal or alloy described above.

[0084] According to exemplary embodiments, the resonant frequency band of the antenna structure described above may cover LTE1, LTE3, LTE5, LTE7, LTE8, and Sub 6 bands. In some embodiments, the resonant frequency band of the antenna structure may be 0.1 GHz to 5 GHz, 0.5 GHz to 4 GHz, or 0.8 GHz to 3.7 GHz.

[0085] FIG. 2 is a schematic plan view showing an antenna structure according to exemplary embodiments. Detailed descriptions of structures and materials substantially identical or similar to those described with reference to FIG. 1 are omitted.

[0086] Referring to FIG. 2, a radiation slot (RS) may be formed within the main radiator (130). The radiation slot (RS) may have a bent line shape.

[0087] The radiation slot (RS) has a bent line shape and may have a closed opening shape that is completely contained within the main radiator (130).

[0088] In some embodiments, the radiation slot (RS) may extend across the first radiator section (130a) and the second radiator section (130b). The radiation slot (RS) may include a first radiation slot section (RS1) formed within the first radiator section (130a) and a second radiation slot section (RS2) formed within the second radiator section (130b).

[0089] The first radiation slot section (RS1) and the second radiation slot section (RS2) may be provided as a single slot connected integrally with each other. The first radiation slot section (RS1) extends along the inclined side of the first radiator section (130a), and the second radiation slot section (RS2) may have a shape that is bent from the first radiation slot section (RS1).

[0090] By forming a radiation slot (RS) within the main radiator (130), impedance matching in the main radiator (MRP) can be more effectively achieved through combination with an intermediate slot (IS). Thus, signal loss in the 5G high-frequency band, for example, can be further suppressed.

[0091] FIG. 3 is a schematic plan view showing an antenna structure according to exemplary embodiments. Detailed descriptions of structures and materials substantially identical or similar to those described with reference to FIG. 2 are omitted.

[0092] Referring to FIG. 3, at least one opening may be formed in the second radiator part (130b) of the main radiator (130). The opening may be spaced apart from the radiator slot (RS) in the first direction and may be located further from the intermediate part (120) in the first direction than from the radiator slot (RS).

[0093] In some embodiments, the opening may include a first opening (OP1) and a second opening (OP2). The first opening (OP1) may have a closed opening shape that is completely contained within the second radiator part (130b). The second opening (OP2) may have an open opening shape.

[0094] For example, a portion of the perimeter of the second radiator part (130b) adjacent to the second opening (OP2) may have a cut shape.

[0095] The aforementioned opening may be added to enhance impedance matching, and additional resonant frequency bands may be added. For example, auxiliary radiation may be implemented in bands of 6 GHz or higher, 6 GHz to 9 GHz, or 7 GHz to 8 GHz.

[0096] In some embodiments, a first groove (GR1) and a second groove (GR2) may be formed in the first radiator part (130a) and the first dummy radiator part (150a), respectively.

[0097] The first groove (GR1) is adjacent to the intermediate section (120) (second intermediate section (124)) and may have a recess shape inserted into the first radiator section (130a) in the first direction. The second groove (GR2) is adjacent to the dummy intermediate section (145) and may have a recess shape inserted into the first dummy radiator section (150a) in the first direction (opposite to the insertion direction of the first groove (GR1)).

[0098] The effect of changing the current transmission path of the first radiator part (130a) through the intermediate slot (IS) can be more easily implemented by the first groove (GR1). Isolation between the dummy radiator (150) and the main radiator (130) can be easily implemented by the second groove (GR2), and radiation reliability in the main radiator (130) can be improved.

[0099] FIG. 4 is a schematic exploded perspective view showing the housing of an antenna device according to exemplary embodiments. According to exemplary embodiments, the antenna device may be provided as a relay antenna or a router device.

[0100] Referring to FIG. 4, the housing of the antenna device may include an upper case (UC) and a lower case (LC). The upper case (UC) and the lower case (LC) may each be formed from a plastic sheet or a plastic plate.

[0101] In some embodiments, a heat sink (HDP) and a circuit board (CB) may be disposed between the upper case (UC) and the lower case (LC). For example, a receiving space may be formed between the upper case (UC) and the lower case (LC) joined together, and the heat sink (HDP) and the circuit board (CB) may be disposed within the receiving space. The power supply cable connected to the signal pad (110) may be electrically connected to the circuit board (CB).

[0102] For example, a circuit board (CB), a heat sink (HDP), and an upper case (UC) may be sequentially arranged / combined along a third direction from a lower case (LC). The third direction is perpendicular to the first direction and the second direction, and may be the thickness direction or the height direction of the antenna device.

[0103] According to embodiments of the present disclosure, an antenna device may be provided by attaching or coupling the above-described antenna structure to the inner upper surface of an upper case (UC) that contacts the receiving space. For example, after removing a protective film attached to the bottom surface of the dielectric layer (100) of the antenna structure, the antenna structure may be attached to the inner upper surface of the upper case (UC) through a point adhesive layer.

[0104] Accordingly, the antenna structure is positioned closer to the external environment, and metallic materials such as a heat sink (HDP) and a circuit board (CB) can be positioned beneath the antenna structure.

[0105] Therefore, effective radiation characteristics are realized from the surface of the antenna structure, and grounding and noise blocking characteristics can also be enhanced.

[0106] FIG. 5 is a schematic plan view showing an antenna structure according to Comparative Example 1. FIG. 6 is a schematic plan view showing an antenna structure according to Comparative Example 2.

[0107] Referring to FIG. 5, the antenna structure of Comparative Example 1 has the same shape and structure as the antenna structure according to the embodiment of FIG. 3, except that an intermediate slot (IS) is not formed in the intermediate part (120).

[0108] Referring to FIG. 6, the antenna structure of Comparative Example 2 has the same shape and structure as the antenna structure according to the embodiment of FIG. 3, except that a dummy slot (DS) is not formed in the dummy radiator (150).

[0109] FIG. 7 is a graph showing the radiation characteristics of antenna structures according to examples and comparative examples. Specifically, FIG. 7 is a simulation graph showing the return loss measured while feeding the antenna structure described with reference to FIG. 3 (Example 1), Comparative Example 1 of FIG. 5, and Comparative Example 2 of FIG. 6 with the same power.

[0110] Referring to FIG. 7, a substantial resonant frequency band in the range of 2 GHz to 5 GHz was obtained from the antenna structures of Example 1 and Comparative Examples 1 and 2 based on a signal loss of -6 dB level. In addition, an auxiliary radiation peak was commonly observed in the range of 7 GHz to 8 GHz.

[0111] In Example 1, a significantly low level of signal loss was exhibited, and a sharp radiation peak was secured in the range of 3 GHz to 4 GHz.

[0112] In Comparative Example 1, where the intermediate slot was omitted, the signal loss increased compared to Example 1 as the radiation peak was split.

[0113] In Comparative Example 2, where the dummy slot was omitted, the signal loss value increased significantly compared to Example 1, and the radiation peak depth also decreased significantly.

Claims

1. A main radiator comprising a main radiator, a signal pad, and an intermediate section connecting the main radiator and the signal pad and having an intermediate slot; and An antenna structure comprising a dummy radiator adjacent to the main radiator and including a dummy radiator having a dummy slot.

2. An antenna structure according to claim 1, wherein the intermediary comprises a first intermediary connected to the signal pad and a second intermediary between the main radiator and the first intermediary, and the intermediary slot is formed in the second intermediary.

3. An antenna structure according to claim 2, wherein the intermediary part further comprises a protrusion disposed between the first intermediary part and the second intermediary part.

4. An antenna structure according to claim 1, wherein the intermediate slot has a closed opening shape limited within the intermediate portion.

5. In claim 1, the dummy radiator comprises a first dummy radiator portion including an inclined side and a second dummy radiator portion extending from the first dummy radiator portion, and The antenna structure comprising the above dummy slot including a first dummy slot portion formed in the first dummy radiator portion and a second dummy slot portion formed in the second dummy radiator portion.

6. An antenna structure according to claim 5, wherein the first dummy slot portion and the second dummy slot portion are integrally connected, and the dummy slot has a bent line shape.

7. An antenna structure according to claim 1, wherein the dummy slot has a closed opening shape limited within the dummy radiator.

8. An antenna structure according to claim 1, wherein the dummy radiator further comprises a dummy intermediary connected to the dummy radiator, and a ground portion connected to the dummy intermediary and disposed adjacent to the signal pad.

9. An antenna structure according to claim 8, wherein the ground portion has a recess into which the signal pad of the main radiating portion is inserted.

10. An antenna structure according to claim 9, wherein at least a portion of the mediating portion is inserted into the recess together with the signal pad.

11. An antenna structure according to claim 8, wherein the main radiator has a shape bent from the intermediate section, and the dummy radiator has a shape bent from the dummy intermediate section in the opposite direction to the main radiator.

12. The antenna structure according to claim 1, wherein the main radiator includes a radiating slot.

13. An antenna structure according to claim 12, wherein the main radiator comprises a first radiator portion connected to the intermediate portion and including an inclined side, and a second radiator portion extending from the first radiator portion.

14. An antenna structure according to claim 13, wherein the radiation slot comprises a first radiation slot portion formed in the first radiator portion and a second radiation slot portion formed in the second radiator portion.

15. An antenna structure according to claim 14, wherein the first radiating slot portion and the second radiating slot portion are integrally connected, and the radiating slot has a bent line shape.

16. An antenna structure according to claim 13, wherein the second radiator part includes an opening.

17. An antenna structure according to claim 16, wherein the opening comprises a first opening having a closed opening shape and a second opening having an open opening shape.

18. Housing; and An antenna device comprising the antenna structure of claim 1 accommodated within the above housing.

19. An antenna device according to claim 18, wherein the housing comprises an upper case and a lower case, and the antenna structure is attached to the inner upper surface of the upper case.

20. An antenna device according to claim 19, further comprising a heat sink and a circuit board disposed between the antenna structure and the lower case.

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