CN219553892U - Antenna structure - Google Patents

Abstract

An embodiment of the present utility model provides an antenna structure including: a radiator including a plurality of radiating portions having sequentially reduced widths; a transmission line electrically connected to the radiator; and a ground pattern disposed at a periphery of the transmission line and physically separated from the radiator and the transmission line.

Description

Antenna structure

Technical Field

The present utility model relates to an antenna structure. More particularly, the present utility model relates to an antenna structure including an antenna unit capable of radiating in a plurality of frequency bands.

Background

Recently, with the development of information socialization, wireless communication technologies such as Wi-Fi, bluetooth (Bluetooth), and the like are applied or built into image display apparatuses, electronic devices, buildings, and the like.

Further, recently, with the development of mobile communication technology, for example, an antenna for performing high-frequency or ultra-high frequency band communication is applied to public transportation means such as buses, subways, and the like, building structures, various mobile devices, and the like.

Therefore, even by one antenna device, it may be necessary to realize radiation characteristics in a plurality of frequency bands. In this case, the high frequency antenna and the low frequency antenna may be included in one device.

However, when antennas of mutually different frequency bands are adjacently arranged, the radiation characteristics, impedance characteristics, and the like of the antennas different from each other may collide with each other to be disturbed.

Further, when antennas of different frequency bands from each other are separately configured, a space for configuring the antennas increases, so that space efficiency, aesthetic characteristics of a structure to which the antenna apparatus is applied may be hindered.

For example, korean laid-open patent No. 2019-0009232 discloses an antenna module integrated into a display panel. However, a broadband antenna that improves radiation reliability is not disclosed.

Disclosure of Invention

An object of the present utility model is to provide an antenna structure having improved radiation characteristics and radiation reliability.

The above object of the present utility model can be achieved by the following technical scheme.

(1) An antenna structure, comprising: a radiator including a plurality of radiating portions having sequentially reduced widths; a transmission line electrically connected to the radiator; and a ground pattern disposed at a periphery of the transmission line and physically separated from the radiator and the transmission line.

(2) The antenna structure according to the above (1), wherein the plurality of radiating portions includes a first radiating portion, a second radiating portion, and a third radiating portion, which are sequentially reduced in width.

(3) The antenna structure according to the above (2), wherein the radiator further includes a first concave portion formed at a boundary between the first radiation portion and the second radiation portion, and a second concave portion formed at a boundary between the second radiation portion and the third radiation portion.

(4) The antenna structure according to the above (2), wherein the first radiation portion, the second radiation portion, and the third radiation portion are arranged in a stepwise manner.

(5) The antenna structure according to the above (2), wherein the length of the first radiating portion, the length of the second radiating portion, and the length of the third radiating portion are different from each other.

(6) The antenna structure according to the above (2), wherein the length of the first radiating portion, the length of the second radiating portion, and the length of the third radiating portion are sequentially reduced.

(7) The antenna structure according to the above (2), wherein an average resonance frequency of the second radiation portion is larger than an average resonance frequency of the first radiation portion.

(8) The antenna structure according to the above (2), wherein an average resonance frequency of the third radiation portion is larger than an average resonance frequency of the second radiation portion.

(9) The antenna structure according to the above (2), wherein the ground pattern is provided as a fourth radiation portion.

(10) The antenna structure according to the above (9), wherein an average resonance frequency of the fourth radiating portion is larger than an average resonance frequency of the third radiating portion.

(11) The antenna structure according to the above (2), wherein the transmission line includes: an extension portion directly connected to a third radiation portion at one end portion of the transmission line; a connection portion electrically connected to an external circuit at the other end portion of the transmission line; and an inclined portion that is disposed between the extension portion and the connection portion, and that narrows in width as it extends from the extension portion toward the connection portion.

(12) The antenna structure according to the above (11), wherein the transmission line further includes a connecting portion which is arranged between the inclined portion and the connecting portion and has a uniform width.

(13) The antenna structure according to the above (1), wherein each side of the radiating portion has a straight line shape.

(14) The antenna structure according to the above (13), wherein the side edge of the radiating portion has a straight line form parallel to the transmission line.

(15) The antenna structure according to the above (1), wherein the ground pattern includes: a first portion having a uniform width; a third portion spaced apart from the first portion and having a width wider than the width of the first portion and a uniform width; and a second portion that is disposed between the first portion and the third portion, and that widens in width as it extends from the first portion toward the third portion.

(16) The antenna structure according to the above (15), further comprising a fourth portion which protrudes from the third portion and includes an alignment mark.

(17) The antenna structure according to the above (15), wherein a distance between the second portion and the transmission line decreases as extending from the first portion toward the third portion.

(18) The antenna structure according to the above (1), wherein the radiator comprises a mesh structure.

(19) The antenna structure according to the above (18), further comprising a virtual mesh pattern disposed at a periphery of the radiator so as to be spaced apart from the radiator.

The effects of the present utility model are as follows.

According to an embodiment of the present utility model, an antenna unit included in an antenna structure may include a plurality of radiating portions sequentially decreasing in width. Thus, a multi-band (multi-band) antenna that performs transmission and reception of signals of multiple frequency bands in one radiator can be realized.

In an exemplary embodiment, the antenna unit may include a ground pattern physically separated from the radiator and including a side inclined to the transmission line side. The ground pattern may be provided as an auxiliary radiator. For example, the ground pattern may add radiation of a high frequency band to the antenna element by coupling with a radiator and/or a transmission line.

In some embodiments, the distance between the ground pattern and the transmission line may be reduced by the inclined side surface. Thus, loss of signals transmitted to the radiator can be suppressed to improve antenna performance.

Drawings

Fig. 1 and 2 are a schematic plan view and a sectional view, respectively, showing an antenna structure of an exemplary embodiment.

Fig. 3 and 4 are schematic plan views respectively showing an antenna structure of an exemplary embodiment.

Fig. 5 is a plan view of the region a of fig. 1 enlarged.

Fig. 6 is a schematic plan view showing an antenna structure of an exemplary embodiment.

Fig. 7 is a schematic cross-sectional view showing an antenna structure of an exemplary embodiment.

Fig. 8 is a schematic diagram showing an application example of the antenna structure of the exemplary embodiment.

Detailed Description

Embodiments of the present utility model provide a structure that provides radiation of multiple resonance bands from one antenna element.

Embodiments of the present utility model are described more specifically below with reference to the accompanying drawings. However, the following drawings attached to the present specification illustrate preferred embodiments of the present utility model and serve to further understand the technical idea of the present utility model together with the content of the foregoing utility model, and therefore the present utility model should not be interpreted as being limited to the matters described in the drawings.

Fig. 1 and 2 are a schematic plan view and a sectional view, respectively, showing an antenna structure of an exemplary embodiment. For convenience of description, detailed configuration/structure of the antenna unit 110 is omitted in fig. 2.

The antenna structure may include a dielectric layer 105, and an antenna unit 110 formed on the dielectric layer 105.

The dielectric layer 105 may include, for example, a transparent resin substance. For example, the dielectric layer 105 may include: polyester resins such as polyethylene terephthalate, polyethylene isophthalate, polyethylene naphthalate and polybutylene terephthalate; cellulose resins such as diacetyl cellulose and triacetyl cellulose; a polycarbonate resin; acrylic resins such as polymethyl (meth) acrylate and polyethyl (meth) acrylate; styrene resins such as polystyrene and acrylonitrile-styrene copolymer; polyolefin resins such as polyethylene, polypropylene, polyolefin having a ring system or norbornene structure, and ethylene-propylene copolymer; vinyl chloride resin; amide resins such as nylon and aromatic polyamide; an imide-based resin; polyether sulfone resin; a sulfone resin; polyether-ether-ketone resin; polyphenylene sulfide resin; a vinyl alcohol resin; vinylidene chloride resin; a vinyl butyral resin; an allyl resin; a polyoxymethylene resin; an epoxy resin; polyurethane or acrylic polyurethane-based resins; silicone resin, and the like. These may be used singly or in combination of 2 or more.

Further, in some embodiments, an adhesive film such as optically clear adhesive (Optically clear Adhesive: OCA), optically clear resin (Optically Clear Resin: OCR) may be included in the dielectric layer 105.

In some embodiments, the dielectric layer 105 may include an inorganic insulating material such as silicon oxide, silicon nitride, silicon oxynitride, glass, or the like.

In one embodiment, the dielectric layer 105 may be provided as a substantially single layer.

In one embodiment, the dielectric layer 105 may comprise a multi-layer structure of at least 2 layers. For example, dielectric layer 105 may include a substrate layer and an antenna dielectric layer, and may include an adhesive layer between the substrate layer and the antenna dielectric layer.

The impedance (impedance) or inductance (inductance) of the antenna element 110 may be formed by the dielectric layer 105 to adjust the frequency band in which the antenna structure may be driven or sensed. In some embodiments, the dielectric constant of the dielectric layer 105 may be adjusted to a range of about 1.5 to 12. When the dielectric constant exceeds about 12, the driving frequency is excessively reduced, so that driving in a high frequency band may not be achieved.

The antenna unit 110 may include a radiator 120, and a transmission line 130 electrically connected with the radiator 120. According to an exemplary embodiment, the antenna unit 110 may include a ground pattern 140 disposed at the periphery of the transmission line 130 and physically separated from the radiator 120 and the transmission line 130.

In an exemplary embodiment, the radiator 120 may include a plurality of radiating parts sequentially decreasing in width. Thus, a multi-band (multi-band) antenna that performs transmission and reception of signals of multiple frequency bands in one radiator can be realized.

The term "width" used in the present utility model may refer to the lateral length of the radiator 120, the transmission line 130, or the ground pattern 140 in fig. 1 and 3 to 6.

In some embodiments, the plurality of radiating portions may include a first radiating portion 122, a second radiating portion 124, and a third radiating portion 126 that decrease in width in sequence. The third radiation portion 126, the second radiation portion 124, and the first radiation portion 122 may be arranged in this order from the transmission line 130 in the planar direction.

The first radiation portion 122 may correspond to an uppermost portion or an outermost profile portion of the distance transmission line 130 in the length direction of the antenna unit 110 in the planar direction.

The first radiating portion 122 may be provided as a low frequency radiator of the antenna unit 110 or the radiator 120. For example, the radiation of the lowest frequency band acquired by the antenna unit 110 from the first radiation portion 122 may be realized. For example, the resonant frequency of the first radiating portion 122 may be in the range of about 0.1 to 1.4 GHz.

In an embodiment, a radiation band corresponding to the LTE1 band may be acquired from the first radiation part 122. In an embodiment, the resonant frequency of the first radiating portion 122 may be in the range of 0.5 to 1GHz or 0.6 to 1 GHz.

The second radiating portion 124 may be provided as the radiator 120 or the first intermediate frequency band radiator of the antenna unit 110. For example, the average resonant frequency of the second radiating portion 124 may be greater than the average resonant frequency of the first radiating portion 122. For example, the resonant frequency of the second radiating portion 124 may be in the range of about 1.5 to 2.5 GHz.

In an embodiment, a radiation band corresponding to the LTE2 band may be acquired from the second radiation part 124. For example, the resonance frequency of the second radiating portion 124 may be in the range of 1.7 to 2.0 GHz.

For example, the resonance frequency range of the second radiating portion 124 may partially overlap with the resonance frequency range of the third radiating portion 126.

In some embodiments, the width of the second radiating portion 124 may be less than the width of the first radiating portion 122.

In some embodiments, the first recess R1 may be formed at the boundary of the first and second radiation portions 122 and 124. By forming the boundary portion of the concave portion morphology, the independent radiation characteristics of the first radiation portion 122 and the second radiation portion 124 can be enhanced. For example, the above-described low-band radiation from the first radiation portion 122 may be prevented from interfering with the first intermediate-band radiation from the second radiation portion 124.

The third radiating portion 126 may be provided as a second intermediate frequency band radiator having a higher resonant frequency range than the radiator 120 or the second radiating portion 124 of the antenna unit 110. For example, the resonant frequency of the third radiating portion 126 may be in the range of about 2.0 to 3.0 GHz.

In an embodiment, a radiation frequency band corresponding to the LTE2 frequency band/the 2.4GHz Wi-Fi frequency band may be acquired from the third radiation section 126. For example, the resonant frequency of the third radiating portion 126 may be in the range of about 2.2 to 2.7 GHz.

For example, the resonance frequency range of the third radiating portion 126 may partially overlap with the resonance frequency range of the second radiating portion 124.

In some embodiments, the width of the third radiating portion 126 may be less than the width of the first radiating portion 122 and the second radiating portion 124.

In some embodiments, the second recess R2 may be formed at the boundary of the second radiation portion 124 and the third radiation portion 126. The second recess R2 can improve the independence and reliability of radiation passing through the third radiation portion 126.

In some embodiments, the transmission line 130 may be directly connected with the third radiation portion 126.

The transmission line 130 may transmit a driving signal or power from a driving Integrated Circuit (IC) chip to the radiator 120, for example.

For example, one end of the transmission line 130 may be directly connected with the third radiating portion 126 to transmit signals and power to the radiator 120. The other end portion of the transmission line 130 may be electrically connected to the driving IC chip through an antenna cable, for example. Accordingly, the transmission and reception of signals from the driving IC chip to the radiator 120 and the supply of electric power can be performed.

In some embodiments, the first, second, and third radiating portions 122, 124, 126 may be arranged in a stepped shape. Thus, the independence of the driving frequency band of each driving radiation portion can be improved.

In some embodiments, each side of the radiating portions 122, 124, 126 may have a rectilinear configuration. For example, the first radiation portion 122, the second radiation portion 124, and the third radiation portion 126 may each have a rectangular shape. Thus, signal transmission between the radiation portions can be realized while suppressing impedance variation. Furthermore, a desired frequency band can be easily adjusted.

In one embodiment, all sides of the radiator 120 may have a straight line shape.

In some embodiments, the sides of the radiating portions 122, 124, 126 may have a rectilinear configuration parallel to the transmission line 130. Thus, the transceiving distance of the signal can be reduced to improve the signal efficiency.

In some embodiments, the length of the first radiating portion 122, the length of the second radiating portion 124, and the length of the third radiating portion 126 may be different from one another. Thus, the spacing between the drive bands of each radiating portion can be adjusted/changed according to the target frequency band.

In some embodiments, the length of the first radiating portion 122, the length of the second radiating portion 124, and the length of the third radiating portion 126 may decrease in sequence. In this case, the interval between the driving frequency ranges of each radiating portion can be widened. For example, it is possible to widen a frequency band between the driving frequency range of the first radiating portion 122 and the driving frequency range of the second radiating portion 124, and to widen a frequency band between the driving frequency range of the second radiating portion 124 and the driving frequency range of the third radiating portion 126. Thus, interference and disturbance between the driving frequency ranges can be prevented, and the resolution (resolution) in each driving frequency range can be improved.

The term "length" used in the present utility model may refer to a length perpendicular to the above-described longitudinal direction of the radiator 120, the transmission line 130, or the ground pattern 140 in fig. 1 and 3 to 6.

According to an exemplary embodiment, the ground pattern 140 may be disposed at the periphery of the transmission line 130 to be spaced apart from the radiator 120 and the transmission line 130. For example, the pair of ground patterns 140 may be arranged to face each other across the transmission line 130.

In some embodiments, the first and second portions 142 and 144 of the ground pattern 140, which will be described later, may be provided as auxiliary radiators. For example, the first portion 142 and the second portion 144 of the ground pattern 140 may be provided as the fourth radiating portion 128 by electrical coupling with the radiator 120 and/or the transmission line 130.

The fourth radiating portion 128 may be provided as a high frequency radiating region of the antenna unit 110. For example, the radiation of the highest frequency band acquired by the antenna unit 110 from the fourth radiation section 128 may be realized. For example, the resonant frequency of the fourth radiating portion 128 may be in the range of about 3.0 to 6.0 GHz.

In an embodiment, the radiation band corresponding to Sub-6 5g may be acquired from the fourth radiation section 128. In an embodiment, the resonant frequency of the fourth radiating portion 128 may be in the range of about 3 to 4GHz or about 3.1 to 3.8 GHz.

The average resonant frequency of the fourth radiating portion 128 may be greater than the average resonant frequency of the third radiating portion 126.

The driving frequency bands of the first, second, third, and fourth radiating parts 122, 124, 126, and 128 described above are exemplary, and may be changed according to the radiation characteristics of the antenna unit 110.

For example, the size/area of the radiator 120 may be adjusted according to a target frequency band. For example, the area of the radiator 120 may be reduced as a whole to convert the driving frequency band to the high frequency band. In this case, the first radiating part 122 may be driven in the radiation band of the above-described second radiating part 124, and the second radiating part 124 may be driven in the radiation band of the above-described third radiating part 126. Further, the third radiating portion 126 may be driven at a radiation band of the fourth radiating portion 128, and the fourth radiating portion 128 may be driven at a high frequency band exceeding the radiation band of the fourth radiating portion 128.

A plurality of radiating parts having resonant frequency ranges different from each other are included in one antenna unit 110, so that space efficiency can be improved while realizing a multiband antenna, for example.

In some embodiments, a plurality of radiators 120 may be listed on the dielectric layer 105 to form a column and/or row of radiators.

According to an embodiment, two radiators 120 may be disposed on the dielectric layer 105 at intervals in the width direction of the dielectric layer 105.

The antenna unit 110 may include 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 thereof. These may be used singly or in combination of two or more.

In an embodiment, for low resistance implementation and fine wide patterning, the antenna element 110 may include silver (Ag) or an alloy (e.g., silver-palladium-copper (APC) alloy), or copper (Cu) or a copper alloy (e.g., copper-calcium (CuCa) alloy).

In some embodiments, the antenna unit 110 may include a transparent conductive oxide such as Indium Tin Oxide (ITO), indium Zinc Oxide (IZO), indium zinc tin oxide (ITZO), zinc oxide (ZnOx).

In some embodiments, the antenna unit 110 may include a laminated structure of a transparent conductive oxide layer and a metal layer, for example, may have a two-layer structure of a transparent conductive oxide layer-metal layer, or a three-layer structure of a transparent conductive oxide layer-metal layer-transparent conductive oxide layer. In this case, while the flexibility characteristics are improved by the metal layer, the signal transfer speed can be improved by reducing the resistance, and the corrosion resistance, transparency can be improved by the transparent conductive oxide layer.

The antenna unit 110 may include a blackening process section. Thus, the reflectivity on the surface of the antenna unit 110 may be reduced to reduce pattern visual recognition due to light reflection.

In an embodiment, the blackening layer may be formed by converting a surface of a metal layer included in the antenna unit 110 into a metal oxide or a metal sulfide. In an embodiment, a blackened layer such as a black material coating or plating layer may be formed on the antenna element 110 or the metal layer. The black material or plating may include silicon, carbon, copper, molybdenum, tin, chromium, molybdenum, nickel, cobalt, or oxides, sulfides, alloys, or the like containing at least one thereof.

The composition and thickness of the blackening layer can be adjusted in consideration of the effect of reducing the reflectance and the radiation characteristics of the antenna.

According to the above-described exemplary embodiments, radiation characteristics of at least three frequency bands may be achieved from the antenna unit 110.

Fig. 3 and 4 are schematic plan views respectively showing an antenna structure of an exemplary embodiment.

Referring to fig. 3 and 4, the lengths of the first, second and/or third radiating portions 122, 124 and/or 126 may be appropriately changed/adjusted according to the target driving frequency. According to an exemplary embodiment, the average resonant frequency of the first radiating portion 122 may be smaller than the average resonant frequency of the second radiating portion 124, and the average resonant frequency of the second radiating portion 124 may be smaller than the average resonant frequency of the third radiating portion 126.

As shown in fig. 4, the length of the second radiating portion 124 may be greater than the length of the first radiating portion 122 and the length of the third radiating portion 126. In this case, the resonance frequency range of the second radiation portion 124 may be shifted (shift) to a lower range.

As shown in fig. 5, the length of the third radiating portion 126 may be greater than the length of the first radiating portion 122 and the length of the third radiating portion 126. In this case, the resonance frequency range of the third radiation portion 126 may be shifted to a lower range.

Fig. 5 is a plan view of the region a of fig. 1 enlarged.

Referring to fig. 5, the ground pattern 140 may include a first portion 142, a second portion 144, a third portion 146, and a fourth portion 148 that are integrally formed.

In some embodiments, the first portion 142 may extend with a uniform width.

The third portion 146 may be configured spaced apart from the first portion 142 and wider than the width of the first portion 142.

The second portion 144 may be disposed between the first portion 142 and the third portion 146, and the width widens as it extends from the first portion 142 toward the third portion 146. In this case, the distance between the ground pattern 140 and the transmission line 130 may be reduced. Thus, loss of signals transmitted from the connection portion 138 to the radiator 120 can be suppressed. For example, the distance between the side of the second portion 144 adjacent to the transmission line 130 and the transmission line 130 may decrease as it extends from the first portion 142 toward the third portion 146.

For example, the first portion 142 may extend from the second portion 144 toward the radiator 120 in the extending direction of the transmission line 130. According to an embodiment, the first portion 142 may have a rectangular configuration.

For example, the third portion 146 may extend from the second portion 144 in a direction opposite the direction of extension of the first portion 142. According to an embodiment, the third portion 146 may have a rectangular configuration. In this case, the area of the third portion 146 may be larger than the area of the first portion 142. Thus, noise in the connection portion 138 connected to the external circuit and the connection portion 136 connected to the connection portion 138 can be suppressed, and the antenna gain can be improved.

According to an embodiment, the length of the inclined portion 134 of the transmission line 130 and the extension direction of the transmission line 130 of the second portion 144 of the ground pattern 140 may be the same. Thus, impedance matching and noise control can be performed more smoothly.

The first portion 142, the second portion 144, and the third portion 146 may be provided as the fourth radiating portion 128, for example, by electrical coupling with the radiator 120 and/or the transmission line 130.

For example, the fourth portion 148 may be provided as a ground pad for the antenna structure. Thus, noise generated when transmitting and receiving a radiation signal through the connection portion 138 can be effectively filtered or reduced.

For example, the fourth portion 148 may include alignment marks 147. Thus, process reliability, precision, and efficiency can be improved.

For example, the first portion 142, the second portion 144, the third portion 146, and the fourth portion 148 may be integrally formed using the same substance.

In some embodiments, the first portion 142, the second portion 144, and the third portion 146 may comprise a mesh structure. Thus, the antenna structure can be prevented from being visually recognized by the user.

In some embodiments, fourth portion 148 may include a solid (solid) structure. Thus, the noise filtering/reducing effect can be improved.

In some embodiments, the transmission line 130 may include an extension 132 directly connected to the third radiating portion at one end and a connection 138 electrically connected to an external circuit (e.g., an antenna cable, etc.) at the other end.

For example, the extension 132 may have a uniform width.

In some embodiments, the transmission line 130 may include a portion whose width narrows from the radiator 120 side toward the connection 138 side.

For example, the transmission line 130 may include an inclined portion 134, the inclined portion 134 being disposed between the extension portion 132 and the connection portion 138, and the width being narrowed as it extends from the extension portion 132 toward the connection portion 138. Thus, as the width of the transmission line 130 becomes wider from the connection portion 138 toward the radiator 120, impedance matching can be achieved in a wider bandwidth. Thus, multi-band resonance can be stably formed in the radiator 120.

In some embodiments, the transmission line 130 may further include a connection portion 136, the connection portion 136 being disposed between the inclined portion 134 and the connection portion 138 and having a uniform width. Thus, the external circuit can be bonded/bonded to the connection portion 138 with high reliability, and desired impedance matching and antenna gain can be stably achieved.

According to an embodiment, the connection portion 136 and the connection portion 138 may have the same width.

In some embodiments, the connection 138 of the transmission line 130 may comprise a solid (solid) structure, and the remainder of the transmission line 130 may comprise a mesh structure.

Fig. 6 is a schematic plan view showing an antenna structure of an exemplary embodiment.

Referring to fig. 6, the antenna structure may further include a virtual mesh pattern 150 disposed at the periphery of the antenna unit 110. For example, the virtual mesh pattern 150 may be electrically and physically separated from the antenna unit 110 by the separation region 155.

For example, a conductive layer containing the above metal or alloy may be formed on the dielectric layer 105. The mesh structure may be formed when the conductive layer is etched along the outline of the antenna element 110 described above. Thus, the antenna unit 110 and the virtual mesh pattern 150 spaced apart from each other by the separation region 155 may be formed.

In some embodiments, the antenna elements 110 may also share a mesh structure. Thus, the transmittance of the antenna unit 110 is improved, and the optical characteristics of the periphery of the antenna unit 110 can be uniformized with the distribution of the virtual mesh pattern 150. Thus, the antenna unit 110 can be prevented from being visually recognized.

In an embodiment, the antenna unit 110 may entirely include the mesh structure. In an embodiment, at least a portion of the transmission line 130 (e.g., the connection portion 138) and at least a portion of the ground pattern 140 (e.g., the fourth portion 148) may include a solid (solid) structure for power efficiency.

In an embodiment, when the ground pattern 140 is disposed in an area of the object body that is not visually recognized by the user, the ground pattern 140 may have a solid structure.

By the first, second and third portions 142, 144, 146 of the ground pattern 140, the implementation of auxiliary radiation by the above-described coupling effect may be facilitated.

For example, when the antenna unit 110 is disposed in an area not visually recognized by a user in the object to which the antenna structure is applied, the antenna unit 110 may include a solid structure.

The dummy mesh pattern 150 may internally include crossing conductive lines forming a mesh structure. In some embodiments, the virtual mesh pattern 150 may include segmented regions where the conductive lines are cut. Thus, the virtual mesh pattern 150 can be prevented from causing the radiation characteristics in the antenna unit 110 to be disturbed.

Fig. 7 is a schematic cross-sectional view showing an antenna structure of an exemplary embodiment.

Referring to fig. 7, the antenna unit 110 may be disposed between the first dielectric layer 105a and the second dielectric layer 105 b. For example, the antenna element 110 may be sandwiched or embedded between the first dielectric layer 105a and the second dielectric layer 105 b.

As the first dielectric layer 105a and the second dielectric layer 105b are disposed at the upper and lower portions of the antenna unit 110, the dielectric and radiation environments of the periphery of the antenna unit 110 may be homogenized.

In some embodiments, the second dielectric layer 105b may also be provided as a coating, insulating layer and/or protective film of the antenna unit 110 or antenna structure.

In some embodiments, the antenna structure may include more than 2 antenna elements 110. For example, a plurality of antenna elements 110 may be arranged to form an array. Unlike this, the plurality of antenna elements 110 may be arranged without forming an array. Thus, the gain of the whole antenna structure can be increased, and multiband radiation can be sufficiently realized.

The antenna structure described above may be applied to various structures, objects, and the like of windows, buildings, windows, vehicles, decorative moldings, guide signs (e.g., direction indicators, emergency exit indicators, emergency lights), and the like of public transportation such as buses, subways, and the like, and may be provided as a relay antenna structure, for example. The relay antenna structure may include, for example, an AP (Access Point) of a relay, a router, a small cell, an internet router, etc.

Fig. 8 is a schematic diagram showing an antenna structure of an exemplary embodiment.

For example, fig. 8 is a schematic diagram showing a form of a router in which an antenna structure is attached to a subject body 200 (for example, a public transportation means such as a bus, a subway, or the like).

Referring to fig. 8, the antenna structure may have a structure such as a building structure, a window, a vehicle, a sign, or the like, which can be fixed to a window, a wall surface, or a ceiling of a public transportation. For example, the antenna unit 110 described above may be inserted into or attached to the substrate.

For example, the substrate may be provided as the dielectric layer 105 as shown in fig. 1. As described with reference to fig. 7, the first dielectric layer 105a and the second dielectric layer 105b are provided together as a substrate, and the antenna unit 110 may be embedded within the substrate. The substrate may be provided as a window, building, various decorative structures, indicator signs, window, etc. of a public transportation vehicle.

In some embodiments, the antenna structures described above may be attached to the substrate in the form of a film.

In some embodiments, as described above, the virtual mesh pattern 150 is formed at the periphery of the antenna unit 110, so that the antenna unit 110 may be reduced or prevented from being visually recognized. At least a portion of the antenna unit 110 may also have a mesh pattern structure.

In some embodiments, the antenna unit 110 may be connected with an external circuit board through the connection portion 132. For example, the external circuit board may be a PCB (Printed Circuit Board ) substrate including a rigid (rib) substrate.

For example, after a conductive bonding structure such as an Anisotropic Conductive Film (ACF) is attached on the connection portion 138 and/or the fourth portion 148 of the ground pattern 140, an adhesive region of the external circuit board may be disposed on the conductive bonding structure. Thereafter, the external circuit board may be connected to the antenna unit 110 through a heat treatment/pressurization process.

An antenna cable may be electrically connected with the conductive bonding structure to supply power to the connection portion 138 of the antenna unit 110.

The antenna cable may be embedded in the object 200 and coupled to an external power source, an integrated circuit chip, or an integrated circuit board, for example. Thus, power may be supplied to the antenna unit 110 to perform antenna radiation.

As shown in fig. 8, the antenna unit 110 is attached to an object 200 (for example, a window of a public transportation means such as a bus or subway) and is electrically connected to a shared Wi-Fi repeater in the public transportation means, for example, by an antenna cable. Thus, a multi-band wireless communication network can be implemented within a public transportation vehicle.

Claims (19)

1. An antenna structure, comprising:

a radiator including a plurality of radiating portions having sequentially reduced widths;

a transmission line electrically connected to the radiator; and

and a ground pattern disposed at a periphery of the transmission line and physically separated from the radiator and the transmission line.

2. The antenna structure of claim 1, wherein the antenna structure comprises,

the plurality of radiating portions include first radiating portions, second radiating portions, and third radiating portions, which are sequentially reduced in width.

3. The antenna structure according to claim 2, wherein,

the radiator further includes a first concave portion formed at a boundary of the first radiation portion and the second radiation portion, and a second concave portion formed at a boundary of the second radiation portion and the third radiation portion.

4. The antenna structure according to claim 2, wherein,

the first radiation part, the second radiation part and the third radiation part are arranged in a step shape.

5. The antenna structure according to claim 2, wherein,

the length of the first radiation portion, the length of the second radiation portion, and the length of the third radiation portion are different from each other.

6. The antenna structure according to claim 2, wherein,

the length of the first radiating portion, the length of the second radiating portion, and the length of the third radiating portion decrease in order.

7. The antenna structure according to claim 2, wherein,

the average resonant frequency of the second radiating portion is greater than the average resonant frequency of the first radiating portion.

8. The antenna structure according to claim 2, wherein,

the third radiating portion has an average resonant frequency greater than an average resonant frequency of the second radiating portion.

9. The antenna structure according to claim 2, wherein,

the ground pattern is provided as a fourth radiating portion.

10. The antenna structure of claim 9, wherein the antenna structure comprises,

the fourth radiating portion has an average resonant frequency greater than an average resonant frequency of the third radiating portion.

11. The antenna structure according to claim 2, wherein,

the transmission line includes:

an extension portion directly connected to a third radiation portion at one end portion of the transmission line;

a connection portion electrically connected to an external circuit at the other end portion of the transmission line; and

and an inclined portion which is disposed between the extension portion and the connection portion and which narrows in width as it extends from the extension portion toward the connection portion.

12. The antenna structure of claim 11, wherein,

the transmission line further includes a connection portion that is disposed between the inclined portion and the connection portion and has a uniform width.

13. The antenna structure of claim 1, wherein the antenna structure comprises,

each side of the radiating portion has a straight line shape.

14. The antenna structure of claim 13, wherein the antenna structure comprises,

the side of the radiation portion has a straight line form parallel to the transmission line.

15. The antenna structure of claim 1, wherein the antenna structure comprises,

the ground pattern includes:

a first portion having a uniform width;

a third portion spaced apart from the first portion and having a width wider than the width of the first portion and a uniform width; and

a second portion disposed between the first portion and the third portion, and having a width that becomes wider as it extends from the first portion toward the third portion.

16. The antenna structure of claim 15, wherein,

a fourth portion is also included that protrudes from the third portion and includes an alignment mark.

17. The antenna structure of claim 15, wherein,

the distance between the second portion and the transmission line decreases as it extends from the first portion toward the third portion.

18. The antenna structure of claim 1, wherein the antenna structure comprises,

the radiator includes a mesh structure.

19. The antenna structure of claim 18, wherein,

the radiator also comprises a virtual net pattern which is arranged at the periphery of the radiator at intervals.