Antenna assembly comprising lens and film layer

The present invention relates to a communication technique which fuses a 5G communication system with IoT technology to support higher data transmission rates after a 4G system, and system thereof. In addition, the present invention provides an antenna assembly which comprises: an antenna array which includes at least one antenna; a film layer which is made of at least one insulating material, spaced apart from the antenna array by a predetermined first distance and joined to one side of a window; and an installation aid which has a surface fixed and attached to the window and the other surface on which an antenna array seating portion is formed.

TECHNICAL FIELD

The disclosure relates to an antenna assembly that is attached to a window and can improve radio wave transmission/reception performance.

BACKGROUND ART

In order to meet wireless data traffic demands that have increased after 4G communication system commercialization, efforts to develop an improved 5G communication system or a pre-5G communication system have been made. For this reason, the 5G communication system or the pre-5G communication system is called a beyond 4G network communication system or a post LTE system. In order to achieve a high data transmission rate, an implementation of the 5G communication system in a mmWave band (for example, 60 GHz band) is being considered. In the 5G communication system, technologies such as beamforming, massive MIMO, Full Dimensional MIMO (FD-MIMO), array antenna, analog beam-forming, and large scale antenna are being discussed as means to mitigate a propagation path loss in the mm Wave band and increase a propagation transmission distance. Further, the 5G communication system has developed technologies such as an evolved small cell, an advanced small cell, a cloud Radio Access Network (RAN), an ultra-dense network, Device to Device communication (D2D), a wireless backhaul, a moving network, cooperative communication, Coordinated Multi-Points (CoMP), and received interference cancellation to improve the system network. In addition, the 5G system has developed Advanced Coding Modulation (ACM) schemes such as Hybrid FSK and QAM Modulation (FQAM) and Sliding Window Superposition Coding (SWSC), and advanced access technologies such as Filter Bank Multi Carrier (FBMC), Non Orthogonal Multiple Access (NOMA), and Sparse Code Multiple Access (SCMA).

Meanwhile, the Internet has been evolved to an Internet of Things (IoT) network in which distributed components such as objects exchange and process information from a human-oriented connection network in which humans generate and consume information. An Internet of Everything (IoE) technology in which a big data processing technology through a connection with a cloud server or the like is combined with the IoT technology has emerged. In order to implement IoT, technical factors such as a sensing technique, wired/wireless communication, network infrastructure, service-interface technology, and security technology are required, and research on technologies such as a sensor network, Machine-to-Machine (M2M) communication, Machine-Type Communication (MTC), and the like for connection between objects has recently been conducted. In an IoT environment, through collection and analysis of data generated in connected objects, an intelligent Internet Technology (IT) service to create a new value for peoples' lives may be provided. The IoT may be applied to fields such as those of a smart home, a smart building, a smart city, a smart car, a connected car, a smart grid, health care, a smart home appliance, or high-tech medical services through the convergence of the conventional Information Technology (IT) and various industries.

Accordingly, various attempts to apply the 5G communication to the IoT network are made. For example, technologies such as a sensor network, Machine to Machine (M2M), and Machine Type Communication (MTC) are implemented by beamforming, MIMO, and array antenna schemes. The application of a cloud RAN as the big data processing technology may be an example of convergence of the 5G technology and the IoT technology.

DISCLOSURE OF INVENTION

Technical Problem

Since the radio wave band that 5G communication systems use is an extremely high frequency (mmWave) band, the coverage to which radio waves can be radiated is limited due to the characteristic of the extremely high frequency band having high linearity. Accordingly, array antennas are used to overcome this problem, but there is a limit in the gain of available radio waves.

Various embodiments of the disclosure provide an antenna assembly that can provide a wide coverage and a high gain in radio wave transmission/reception, particularly, provide the configuration of an antenna assembly when the antenna assembly is disposed around a window in a building.

Solution to Problem

An antenna assembly according to the disclosure may include: an antenna array including at least one antenna; a film layer made of at least one insulating substance, spaced a predetermined first distance apart from the antenna array, and bonded to a surface of a window; and an assistant installation structure having a first surface attached and fixed to the window and a second surface on which an antenna array seat is formed.

The antenna assembly may further include a lens spaced a predetermined second distance from the antenna array and disposed between the antenna array and the film layer, in which a seat for the lens may be formed on the second surface of the assistant installation structure.

The lens may be composed of a plurality of unit cells, and the unit cells may correct a phase of radio waves radiated from the antenna array in accordance with permittivity.

Permittivity of the insulating substance of the film layer may be lower than permittivity of the window and higher than permittivity of air, and the film layer may reduce a loss of transmission of radio waves through the window if the film layer is attached to the window.

The assistant installation structure may be attached and fixed to a sill of the window.

The assistant installation structure may be attached and fixed to a window frame of the window.

The antenna array may be fixed by being coupled to the assistant installation structure through the antenna array seat.

The antenna array seat may be formed so that the antenna array can be detachably attached to the assistant installation structure.

An antenna assembly according to the disclosure may include: an antenna array including at least one antenna; a film layer made of at least one insulating substance, spaced a predetermined first distance apart from the antenna array, and bonded to a surface of a window; and an assistant installation structure having a first surface coupled to the window and a second surface on which an antenna array seat is formed.

The antenna assembly may further include a lens spaced a predetermined second distance from the antenna array and disposed between the antenna array and the film layer, in which a seat for the lens may be formed on the second surface of the assistant installation structure.

The lens may be composed of a plurality of unit cells, and the unit cells correct a phase of radio waves radiated from the antenna array in accordance with permittivity.

A protrusion may be formed on a surface of the assistant installation structure, and the assistant installation structure may be fitted to the window by the protrusion.

Forceps may be formed on a surface of the assistant installation structure, and the assistant installation structure may be coupled to the window by the forceps.

A compression portion may be formed on a surface of the assistant installation structure, and the assistant installation structure may be coupled to the window by the compression portion.

A bonding portion may be formed on a surface of the assistant installation structure, and the assistant installation structure may be coupled to the window by the bonding portion.

A slide groove may be formed on a surface of the assistant installation structure, and the assistant installation structure may be coupled to the window by the slide groove.

The antenna array may be fixed by being coupled to the assistant installation structure through the antenna array seat.

The antenna array seat may be formed so that the antenna array can be detachably attached to the assistant installation structure.

Advantageous Effects of Invention

An antenna assembly according to various embodiments can provide a wide coverage and a high gain in radio wave transmission/reception.

MODE FOR THE INVENTION

In describing the exemplary embodiments of the disclosure, descriptions related to technical contents which are well-known in the art to which the disclosure pertains, and are not directly associated with the disclosure, will be omitted. Such an omission of unnecessary descriptions is intended to prevent obscuring of the main idea of the disclosure and more clearly transfer the main idea.

As described above, an antenna assembly according to the disclosure may include an antenna array, a film layer, and a lens. The film layer and the lens are used to improve transmission performance of radio waves that are radiated through the antenna array or to improve reception performance of radio waves that are received through the antenna array.

Accordingly, in order to help understand the disclosure, the configuration and effect of the film layer and the lens of the antenna assembly will be described in more detail and, hereafter, the configuration of the film layer is described in detail first.

FIG. 1is a view briefly showing a base station, a repeater including an antenna array, and a window;

A base station110outputs radio waves through an antenna and the radio waves output from the base station110can be transmitted to a repeater120. On the contrary, as described above, the base station may receive radio waves output from the repeater120, but it is exemplified that the base station110is a transmission part and the repeater120is a reception part in this specification.

The repeater120, which is terminal equipment connected to a network, may be, for example, a modem, a set-top box, a terminal, etc. The repeater120(customer premises equipment) may be disposed indoor, and particularly, may be disposed around a window130.

The wireless communication frequency band of the base station110and the repeater120may be a superhigh frequency (e.g., 28 GHz) band. As known in the art, when a high frequency band is used in a superhigh frequency band, there is an advantage in terms of transmission speed, but radio wave attenuation is unavoidably intense

Accordingly, it is preferable to dispose the repeater120that performs communication with the base station110outside a building, in a communication system that uses superhigh frequency communication. However, when the repeater120is disposed outside a building, there is a high possibility that the repeater120is damaged by external factors (rain, snow, external shock, etc.).

Therefore, it is preferable to dispose the repeater120inside a building, and accordingly, it is considered to dispose the repeater120around the window130in a building, as described above. This is because radio wave attenuation due to the window130is less than radio wave attenuation due to the walls of a building.

Hereafter, various embodiments in which the repeater120can be disposed around the window130are provided. In more detail, the repeater120and the window130may be combined through an assistant installation device, and the assistant installation device and the window130may be combined in various ways.

Meanwhile,FIG. 1is only an example of an actual use type of various embodiments of the disclosure, and the configuration and actual use types of the base station110and the repeater120are not limited thereto. That is, various embodiments of the disclosure may relate to a window product that can improve transmission of radio waves that are transmitted from an antenna of a first device (e.g., the base station110) to an antenna of a second device (e.g., the repeater120), or a film-layered product that is attached to a window, in which the kinds or actual use types of the first device and the second device are not limited.

FIG. 2is a view showing an embodiment of an antenna assembly according to the disclosure.

An antenna assembly200according to the disclosure may include: an antenna array201including at least one antenna; a film layer221made of at least one insulating substance, spaced a predetermined first distance apart from the antenna array, and bonded to a surface of a window231; a lens211spaced a predetermined second distance from the antenna array and disposed between the antenna array and the film layer; and an assistant installation structure241having a first surface attached and fixed to the window and a second surface on which an antenna array seat and a lens seat are formed.

The lens211is not a necessary component in the antenna assembly200according to the disclosure. The lens may not be provided, depending on the characteristics of the antenna array201and the film layer221. However, the lens211has an effect that improves a gain value of a beam, which is radiated through the antenna array201, by changing the phase of the beam, so it may be preferable that the lens211is included in the antenna assembly200, thereby improving the performance of the antenna assembly200. A more detailed operation and configuration of the lens211will be described below.

Further, the permittivity of the insulating substance of the film layer221according to the disclosure may be lower than the permittivity of the window231and higher than the permittivity of air, thereby being able to reduce a loss of transmission of radio waves that travel into the window231and pass through the window231.

The film layer221, as shown inFIG. 2, may be disposed not only on the side of the window inside a building, but also the side of the window outside a building. That is, a film layer can be disposed on both of the inner side and the outer side of the window. A more detailed operation and configuration of the film layer221will be described below.

The assistant installation structure241according to the disclosure, as described above, may have seats to which the antenna array201, the film layer221, and the lens211can be seated, respectively. The assistant installation structure241may be formed in an integrated type that is fixed to the window231or a separated type that can be detachably coupled to the window231.

Whether to couple the assistant installation structure to a window in an integrated type or a separated type may depend on the performance of the antenna assembly, the position of the window, the shape of the window, or the like. For example, when radio waves always travel to a fixed position in a window, it would be preferable to couple the antenna assembly to the window through an integrated-type assistant installation structure. However, when whether to couple the antenna assembly to a window is unclear and radio waves irregularly travel into the window, it may be preferable to couple the antenna assembly to the window through a separated-type assistant installation structure.

Accordingly, hereafter, an antenna assembly structure according to an embodiment is described in more detail separately in an integrated type and a separated type. Meanwhile, an antenna assembly structure is shown inFIG. 2as an embodiment, so the scope of the disclosure should not be limited to the antenna assembly structure shown inFIG. 2.

FIG. 3is a view showing a first embodiment of an integrated antenna assembly structure.

An antenna assembly301according to an embodiment may be attached and fixed to a sill331of a window321. In more detail, the antenna assembly301according to the disclosure may include an assistant installation structure331coupled and fixed to the sill331.

As described above, since the antenna assembly structure shown inFIG. 3is an integrated-type antenna assembly structure, the assistant installation structure331may be integrated with the window sill331when the window sill331is formed.

That is, a user can use mobile communication through the window321by coupling only an antenna array and a lens to an antenna array seat and a lens seat of the assistant installation structure311formed on the window sill331.

FIG. 4is a view showing second embodiment of an integrated antenna assembly structure.

An antenna assembly401according to an embodiment may be attached and fixed to the frame of a window421. In more detail, the antenna assembly401according to the disclosure may include an assistant installation structure411coupled and fixed to the frame of the window421.

As described above, since the antenna assembly structure shown inFIG. 4is an integrated-type antenna assembly structure, the assistant installation structure411may be integrated with a window frame when the window frame is formed in a building.

That is, a user can use mobile communication through the window421by coupling only an antenna array and a lens to an antenna array seat and a lens seat of the assistant installation structure411formed at the window frame.

AlthoughFIG. 4shows only a structure in which an assistant installation structure is integrally formed on a side of a window frame, the scope of the disclosure should not be limited thereto and the assistant installation structure may be formed any positions over, under, at the left, and at the right of the window frame.

Further, other than the window sill or frame shown inFIGS. 3 and 4, it may be considered to couple an assistant installation structure directly to a window surface in an integrated type. In this case, an assistant installation structure may be made of a substance that can be integrated with a window by being fixed and coupled to the window.

That is, the disclosure provides an antenna assembly that includes a window and an assistant installation structure, which are formed in an integrated type, and that can communicate with an external communication system (a base station or a terminal) through the window using an antenna array coupled to the assistant installation structure.

The antenna array can also be detachably attached to the assistant installation structure, like the lens described above. In more detail, the assistant installation structure and the antenna array can be detachably coupled to each other in a fitting type (in which, since the antenna array can be attached and detached, there may be an advantageous effect in terms of maintenance of the antenna array).

Unlike the integrated-type antenna assembly structure described above, a window and an antenna assembly may be configured in a separated type. That is, a window and an antenna assembly may be combined through a separate configuration without an assistant installation structure integrally formed with a window to couple an antenna array.

In the separated-type antenna assembly structure, the arrangement of a film layer, a lens, and an antenna array is the same as that in the integrated-type antenna assembly. Accordingly, the description about the integrated-type antenna assembly structure is referred to for the description about the film layer, the lens, and the antenna array in the separated-type antenna assembly structure.

However, unlike that the assistant installation structure is integrally formed with a window in the integrated-type antenna assembly structure, an assistant installation structure is formed separately from a window in the separated-type antenna assembly structure. Accordingly, what type the assistant installation structure of a separated-type antenna assembly structure can be coupled to a window in is described hereafter.

Since an embodiment in which a separated-type antenna assembly structure can be coupled to a window is described hereafter, the scope of the disclosure should not be limited only to the following embodiment.

FIG. 5is a view showing a first embodiment of a separated antenna assembly structure.

According to the first embodiment of a separated-type antenna assembly structure, a protrusion512may be formed on a surface of an assistant installation structure511. For example, the protrusion512may be a screw with threads. A groove may be formed at a window521at a position corresponding to the protrusion of the assistant installation structure. For example, threads corresponding to the threads of the protrusion may be formed in the groove.

Accordingly, it is possible to couple an antenna assembly501to the window521by thread-fastening the screw to the groove. According to the first embodiment, a groove for fitting has to be formed at the window521. Accordingly, the material of the portion that is fitted may have high strength such as the frame or sill of a window.

Although the protrusion512is formed at the assistant installation structure511and a groove is formed at the window inFIG. 5, a protrusion may be formed at the window521and a groove may be formed at the assistant installation structure511. That is, the scope of the disclosure should not be limited to the structure shown inFIG. 5.

FIG. 6is a view showing a second embodiment of a separated-type antenna assembly structure.

According to the second embodiment of a separated-type antenna assembly structure, forceps612may be formed on a surface of an assistant installation structure611. For example, the assistant installation structure611can hold the frame or the sill of a window621using the forceps612, whereby an antenna assembly601can be coupled and fixed to the window621.

The second embodiment may be combined with the first embodiment described above. That is, a protrusion may be formed at the forceps formed at the assistant installation structure, and an antenna assembly and a window may be more firmly coupled by the protrusion (a third embodiment and a fifth embodiment to be described below may also be combined).

FIG. 7is a view showing a third embodiment of a separated-type antenna assembly structure.

According to the third embodiment of a separated-type antenna assembly structure, a compression portion712may be formed on a surface of an assistant installation structure711. For example, a plurality of compression portions712may be formed with predetermined gaps on a surface of the assistant installation structure, and the antenna assembly701and the window721can be coupled and fixed by the plurality of compression portions712.

According to the third embodiment, unlike the first embodiment or the second embodiment, there is an advantage that the antenna assembly can be directly coupled to a glass surface rather than a window sill or a window frame. Further, the antenna assembly can be simply installed in comparison to the first embodiment or the second embodiment.

FIG. 8is a view showing a fourth embodiment of a separated-type antenna assembly structure.

According to the fourth embodiment of a separated-type antenna assembly structure, a bonding portion812may be formed on a surface of an assistant installation structure811. For example, a plurality of bonding portions812may be formed with predetermined gaps on a surface of the assistant installation structure, and an antenna assembly801and a window821can be coupled and fixed by the plurality of bonding portions812.

The fourth embodiment also has an advantage that the antenna assembly can be directly coupled to a glass surface in the same way as the third embodiment. In addition, the fourth embodiment has an advantage that the antenna assembly can be most simply installed in comparison to other embodiments.

FIG. 9is a view showing a fifth embodiment of a separated antenna assembly structure.

According to the fifth embodiment of a separated-type antenna assembly structure, a side groove912may be formed on a surface of an assistant installation structure911. For example, a slide protrusion corresponding to the slide groove may be formed at a window sill or a window frame, and the assistant installation structure911may be coupled to the slide protrusion by sliding. That is, an antenna assembly901and a window921can be coupled and fixed by the slide groove912.

FIGS. 10A and 10Bare views showing a window according to an embodiment and a film layer attached to the window.

In the first embodiment of the disclosure, a film layer1010made of an insulating substance is attached to a window1020made of a common glass material to reduce reflection of radio waves passing through the window from the outside.

According to this embodiment, the film layer1010is made of at least one insulating substance and may be bonded to a surface of the window1020. The film layer1010is provided to reduce a loss of transmission of radio waves through the window1020when it is attached to the window1020.

According to this embodiment, the window1020may be common glass not containing metallic substances. As known in the art, the permittivity of a window made of glass may be about 6 to 7 F/m and the permittivity of air may be about 1 F/m. The difference in permittivity increases the reflection ratio of radio waves output from a base station and then passing through the window1020, which may be a factor that interferes with radio wave reception by a repeater disposed indoor.

Accordingly, the permittivity of the film layer1010may be lower than the permittivity of the window1020and higher than the permittivity of air1030to reduce the reflection ratio due to the difference in permittivity between the air1030and the window1020. For example, the permittivity of the film layer1010may be 2 to 4 F/m.

According to an embodiment, the film layer1010may be composed of a plurality of film layers, which may have different permittivity. In this case, the permittivity of the film layers may be lower than the permittivity of the window1020and higher than the permittivity of the air1030, and they may be attached closer to the window in higher order of permittivity.

According to an embodiment, the thickness of the film layer1010may be determined such that the entire thickness is proportioned to the wavelength of radio waves when the film layer1010is attached to the window1020, and may be determined in consideration of the thickness of the window1020and the frequency thickness of radio waves.

FIGS. 11A and 11Bare views showing a window according to an embodiment and a film layer attached to the window.

A film layer1110may include an insulating layer and an electrode layer. The size of the film layer1110is not limited, but may be the size or more of an area through which radio waves can pass when radio waves reach a repeater through a window1120from the outside, in consideration of at least the distance from the repeater. As shown inFIG. 11A, a surface of an insulating layer may be attached to the window1120through an adhesive.

A loss of radio waves may be generated by reflection in glass due to physical characteristics and the radio wave loss value can be reduced by attaching the film layer1110.

According to various embodiments, a multi-layer window1132and1134may be used, and a plurality of film layers1112and1114may be attached respectively to windows1132and1134of the multi-layer window1132and1134. The electrode patterns of film layers1112and1114that are attached to windows1120, respectively, may be the same.

The glass of the multi-layer window1132and1134has high permittivity, so reflection occurs, and destructive interference may occur due to a signal re-reflected from the inside of the multi-layer window1132and1134. Further, when the antenna of a repeater is positioned close to the windows1132and1134, performance may be deteriorated by reflective waves. According to various embodiments, when the film layers1112and1114are attached the windows1132and1134, respectively, the reasons exemplified above are reduced, so a loss of radio waves can be decreased.

FIG. 12is a view showing an antenna assembly1201according to various embodiments.

The antenna assembly1201according to various embodiments may include an antenna array1200and a lens1210. The lens1210includes a plurality of unit cells and the unit cells can change the index of refraction of radio waves in accordance with inherent permittivity. The lens1210can correct a phase by refracting radio waves radiated from the antenna array1200.

In the lens1210according to various embodiments, unit cells having the same permittivity are arranged in an x-axial direction and unit cells having different permittivity are arranged in a y-axial direction, whereby when radio waves radiated from the antenna array1200travel in the x-axial direction, the radio waves have the same phase as that of radio waves traveling into the lens1210, thereby being able to amplify the coverage of the output radio waves.

The unit cells according to various embodiments may have a 3-dimensional shape having unit area and height. The unit cells have the same unit area, but the permittivity of the unit cells may be changed by the material or height of dielectrics of the unit cells. For example, when unit cells have dielectrics having the same unit area and material, the permittivity may depend on the height of the unit cells.

When the unit cells included in the lens1210are same in unit area and height, the permittivity of the unit cells may depend on the material of the unit cells. When unit cells having the same unit area and height are disposed in the lens1210in both of the x-axial direction and the y-axial direction, in the lens1210according to various embodiments, unit cells having the same permittivity because the materials of the dielectrics are the same are disposed in the x-axial direction and unit cells having different permittivity because the materials of the dielectrics are different are disposed in the y-axial direction, whereby radio waves radiated from the antenna array1200have the same phase as radio waves traveling into the lens1210when traveling in the x-axial direction, thereby being able to amplify the coverage of the output radio waves.

Since permittivity may be depend on the heights of unit cells having the same unit area and the same material of dielectrics, unit cells having the same height are arranged in an x-axial direction and unit cells having different heights are arranged in a y-axial direction in the lens1210, whereby when radio waves radiated from the antenna array1200travel in the x-axial direction, the radio waves have the same phase as that of radio waves traveling into the lens1210, thereby being able to amplify the coverage of the output radio waves.

For example, when the material of the dielectric and the unit areas of the unit cells of the lens1210are the same, it is possible to change the permittivity by changing the heights. The unit cells forming a pattern may have the same height and height differences may be generated in unit cells of different patterns.

Unit cells are not disposed in the lens1210according to various embodiments and a metal pattern is formed on the lens1210, whereby it is possible to change the phase of radio waves that are radiated from the antenna array1200.

FIG. 13is a view showing an antenna assembly1301according to various embodiments.

An antenna assembly1301according to various embodiments may include an antenna array1300and a lens1320. The lens1320may include a plurality of unit cells1320.

In the lens1310according to various embodiments, unit cells1320having the same permittivity are disposed in an x-axial direction and unit cells having different permittivity are disposed in a y-axial direction, whereby radio waves radiated from the antenna array1300have the same phase as those of radio waves traveling out of the lens1310and radio waves traveling into the lens1310when traveling in the x-axial direction of the lens1310, thereby being able to amplify the coverage of output radio waves. Further, when the radio waves radiated from the antenna array1300travel in the y-axial direction of the lens1310, the radio waves traveling out of the lens1310all have the same phase, thereby being able to increase the gain of output radio waves.

Unit cells1320having the same permittivity are disposed in the x-axial direction and unit cells having different permittivity are disposed in the y-axial direction in the lent1310according to various embodiments, whereby the unit cells1320having the same permittivity and disposed in the x-axial direction may have a linear pattern having a straight line or an open curve.

Unit cells are not disposed in the lens1310according to various embodiments and a metal pattern is formed on the lens1310, whereby it is possible to change the phase of radio waves that are radiated from the antenna array1300. The metal pattern on the lens1310may have a linear pattern having a straight line or an open curve in the x-axial direction.

The unit cells1320according to various embodiments may have a 3-dimensional shape having unit area and height. The unit cells1320have the same unit area, but the permittivity of the unit cells may be changed by the material or height of dielectrics of the unit cells. For example, when the unit cells1320have the same unit area and material, the permittivity may depend on the heights of the unit cells1320.

When the unit cells1320included in the lens1310are same in unit area and height, the permittivity of the unit cells1320may depend on the material. When unit cells1320having the same unit area and height are disposed in the lens1310in both of the x-axial direction and the y-axial direction, in the lens1310according to various embodiments, unit cells1320having the same permittivity because the materials of the dielectrics are the same are disposed in the x-axial direction and unit cells1320having different permittivity because the materials of the dielectrics are different are disposed in the y-axial direction, whereby radio waves radiated from the antenna array1300have the same phase as radio waves traveling into the lens1310when traveling in the x-axial direction, thereby being able to amplify the coverage of the output radio waves.

When the unit cells1320in the lens1310have the same unit area and the same material of dielectrics, since permittivity may be depend on the heights of unit cells1320, unit cells1320having the same height are arranged in an x-axial direction and unit cells1320having different heights are arranged in a y-axial direction in the lens1310, whereby when radio waves radiated from the antenna array1300travel in the x-axial direction have the same phase as that of radio waves traveling into the lens1310, thereby being able to amplify the coverage of the output radio waves.

For example, when the material of the dielectric and the unit areas of the unit cells1320of the lens1310are the same, it is possible to change the permittivity by changing the heights. The unit cells1320forming a pattern may have the same height and height differences may be generated in unit cells1320of different patterns.

Unit cells are not disposed in the lens1310according to various embodiments and a metal pattern is formed on the lens1310, whereby it is possible to change the phase of radio waves that are radiated from the antenna array1300. The metal pattern on the lens1310may have a linear pattern having a straight line or an open curve in the x-axial direction.

Meanwhile, the embodiments of the disclosure disclosed in the specification and the drawings have been presented to easily explain technical contents of the disclosure and help comprehension of the disclosure, and do not limit the scope of the disclosure. That is, it is obvious to those skilled in the art to which the disclosure belongs that different modifications can be achieved based on the technical spirit of the disclosure. Further, if necessary, the above respective embodiments may be employed in combination. For example, parts of embodiment 1, embodiment 2, and embodiment 3 of the disclosure are combined so as to employ a base station and a terminal. In addition, the above embodiments are presented based on an LTE system, but other modifications based on the technical spirit of the embodiment can be implemented in other systems such as a 5G or NR system or the like.