Electronic device

Abstract

This electronic device is provided with a donor antenna, a service antenna, and a core case in which the donor antenna and the service antenna are disposed. The electronic device relays radio waves by transmitting, from the service antenna, radio waves received from the donor antenna. The core case is configured to cover a ground surface on a side opposite to a radiation surface of radio waves of the donor antenna or the service antenna.

Description

electronic equipment CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority to Japanese Patent Application No. 2024-105443, filed on June 28, 2024, the entire disclosure of which is incorporated herein by reference.

[0002] The present disclosure relates to an electronic device that relays radio waves.

[0003] One known technology for extending the service area of ​​wireless communication is a radio wave repeater (repeater), such as a repeater. The repeater (wireless repeater) includes an antenna (donor antenna) on the donor unit (DU) side that receives radio waves transmitted from a base station or the like, and an antenna (service antenna) on the service unit (SU) side that transmits the received radio waves to a terminal or the like. The repeater can, for example, amplify the radio waves received from the base station via the donor antenna and transmit them to the terminal from the service antenna.

[0004] Various technologies relating to wireless repeaters have been proposed. For example, Patent Document 1 proposes a wireless repeater that enables flexible route changes as a node in a mesh network.

[0005] Patent No. 7445808

[0006] According to one embodiment, an electronic device includes a donor antenna, a service antenna, and a core case in which the donor antenna and the service antenna are disposed, and relays radio waves by transmitting the radio waves received from the donor antenna from the service antenna, wherein the core case is configured to cover a ground surface on the opposite side to the radio wave emission surface of the donor antenna or the service antenna.

[0007] FIG. 1 is a block diagram schematically illustrating a functional configuration of an electronic device according to an embodiment. FIG. 2 is a diagram illustrating an antenna of the electronic device according to an embodiment. FIG. 3 is a diagram illustrating radio waves radiated by an antenna of the electronic device according to an embodiment. FIG. 4 is a diagram illustrating radio waves radiated by an antenna of a comparative example of the electronic device according to an embodiment. FIG. 5 is a diagram illustrating a cross section of the electronic device according to an embodiment. FIG. 6 is a diagram illustrating a cross section of the electronic device according to an embodiment.

[0008] In electronic devices that relay radio waves, such as the repeater described above, interference between radio waves transmitted and received by the electronic device can affect the relay of radio waves. Therefore, it is desirable to reduce radio wave interference in such electronic devices that relay radio waves. According to one embodiment, an electronic device that reduces interference in the radio waves being relayed can be provided.

[0009] In the present disclosure, an "electronic device" may refer to a device powered by electricity. In particular, in the embodiments described below, an "electronic device" may refer to a device, equipment, or equipment that relays radio waves. Furthermore, a "system" may refer to an equipment or equipment including a device powered by electricity. Furthermore, a "user" may refer to a person (typically a human) who uses an electronic device and / or system according to an embodiment. An electronic device and / or system according to an embodiment can reduce interference of relayed radio waves.

[0010] An electronic device according to an embodiment described below receives radio waves transmitted from, for example, a base station, and relays the radio waves by transmitting (transferring) the received radio waves to, for example, a terminal, etc. Therefore, the electronic device according to an embodiment may be implemented as, for example, a relay device, or more specifically, a repeater, and various implementations are possible.

[0011] 1 is a block diagram showing a schematic functional configuration of an electronic device according to an embodiment of the present invention. The functional configuration of the electronic device according to an embodiment of the present invention will be described below.

[0012] As shown in Figure 1, an electronic device 1 in one embodiment receives radio waves from a radio base station gNB (gNodeB) and relays the radio waves to a radio terminal UE (User Equipment) by transmitting (forwarding) the radio waves received from the radio base station gNB to the radio terminal UE.

[0013] 1 , an electronic device 1 according to an embodiment may include a donor antenna 11, a service antenna 12, a donor unit (DU) 21, a service unit (SU) 22, and an amplifier 30. The electronic device 1 according to an embodiment may not include some of the functional units shown in FIG. 1 , or may include functional units other than those shown in FIG. 1 . Furthermore, a system according to an embodiment may be configured to include the entire electronic device 1 or at least a part of the electronic device 1.

[0014] The donor antenna 11 functions as an antenna used for communication with the radio base station gNB. The service antenna 12 has a function of communicating with a radio terminal UE or with other donor antennas. The donor antenna 11 and the service antenna 12 each transmit and receive radio waves and have a function of hopping within the communication network to connect to the next repeater (repeater). The donor antenna 11 and the service antenna 12 may have the same configuration or different configurations.

[0015] FIG. 2 is a diagram showing an example of the appearance of an antenna module such as a donor antenna 11 or a service antenna 12. As shown in FIG.

[0016] As shown in Fig. 2, the donor antenna 11 or the service antenna 12 may include, for example, a plurality of antenna elements arranged one-dimensionally or two-dimensionally. In the example shown in Fig. 2, the donor antenna 11 or the service antenna 12 is configured as a patch antenna (microstrip antenna) having a plurality of antenna elements arranged two-dimensionally in the vertical and horizontal directions. The donor antenna 11 or the service antenna 12 shown in Fig. 2 includes, as an example, six antenna elements in the horizontal direction and ten antenna elements in the vertical direction. Meanwhile, in one embodiment, the donor antenna 11 or the service antenna 12 may include any number of antenna elements depending on the desired application and / or function, etc.

[0017] The donor antenna 11 or the service antenna 12 shown in Fig. 2 shows a radiation surface of radio waves. That is, the donor antenna 11 or the service antenna 12 shown in Fig. 2 may radiate radio waves in the forward direction of Fig. 2. The donor antenna 11 or the service antenna 12 according to an embodiment may include, for example, a shielding case, as shown in the lower part of Fig. 2. In this case, the shielding case may house various electronic components, such as an IC (Integrated Circuit), inside.

[0018] 2, a ground plate may be disposed on the surface opposite to the radiation surface of the donor antenna 11 or the service antenna 12. Hereinafter, the surface opposite to the radiation surface of the radio waves of the donor antenna 11 or the service antenna 12 will also be referred to as the ground surface. Furthermore, the surface opposite to the radiation surface of the donor antenna 11 or the service antenna 12 shown in FIG. 2 (ground surface) may house various electronic components, such as a BFIC (beam forming IC).

[0019] An antenna such as that shown in Fig. 2 is generally called a phased array antenna module (PAAM). It is known that in such an antenna module, the greater the number of antenna elements and the larger the size of the antenna module, the narrower the width of the radiated wave (beam) and the longer the distance the radiated wave can reach. Since conventionally known antenna modules can be used for the donor antenna 11 and the service antenna 12, detailed description thereof will be omitted as appropriate.

[0020] FIG. 3 is a diagram schematically illustrating a beam radiated by an antenna module such as the donor antenna 11 or the service antenna 12. FIG. 3 may be a diagram illustrating, for example, the donor antenna 11 or the service antenna 12 as viewed from above. That is, the donor antenna 11 or the service antenna 12 illustrated in FIG. 3 may radiate radio waves horizontally relative to the ground. Furthermore, the normal vector of the radio wave radiation surface of the donor antenna 11 or the service antenna 12 illustrated in FIG. 3 may be orthogonal to the normal vector of the ground. FIG. 3 illustrates the donor antenna 11 or the service antenna 12 with the radio wave radiation surface facing upward in FIG. 3. That is, the front direction in FIG. 2 may correspond to the upward direction in FIG. 3.

[0021] As shown in Fig. 3, the donor antenna 11 or the service antenna 12 radiates a main lobe ML (main beam or main radiation) in the upward direction shown in Fig. 3. The angle θ shown in Fig. 3 indicates the half-power angle at which the power of the main radiation is halved (i.e., the angular width of the main radiation). In addition to the main lobe ML, the donor antenna 11 or the service antenna 12 also radiates a side lobe SL (sub-beam or secondary radiation) and a back lobe BL. As shown in Fig. 3, the side lobe SL is radiated in a direction oblique to the direction of the main lobe ML. Also, as shown in Fig. 3, the back lobe BL is radiated in the opposite direction to the main lobe ML.

[0022] The main lobe ML, side lobes SL, and back lobe BL shown in Fig. 3 are schematic images. The sizes, numbers, directions, etc. of the main lobe ML, side lobes SL, and back lobe BL shown in Fig. 3 are not limited to the embodiment shown in Fig. 3. For example, the side lobes SL shown in Fig. 3 may be radiated in a direction, number, and / or size (length and / or width) different from the embodiment shown in Fig. 3. The donor unit (DU) 21 and the service unit (SU) 22 communicate with each other.

[0023] As shown in Fig. 1, the donor antenna 11 is connected to a donor unit (DU) 21. With this connection, the donor unit 21 can receive radio waves transmitted from a radio base station gNB via the donor antenna 11. The donor unit 21 may employ a circuit or the like having the same or similar configuration as a known donor (DU) in a known repeater or the like, and therefore a more detailed description thereof will be omitted. The radio waves received by the donor unit 21 are supplied to an amplifier 30 connected to the donor unit 21.

[0024] The amplifier 30 may have a function such as amplifying the radio waves received by the donor unit 21. The amplifier 30 may have other functions in addition to or instead of the function of amplifying the radio waves received by the donor unit 21. The amplifier 30 may employ a circuit having the same or similar configuration as a known amplifier in a known repeater, and therefore a detailed description thereof will be omitted. The radio waves amplified by the amplifier 30 are supplied to a service unit (SU) 22 connected to the amplifier 30.

[0025] The service unit 22 may employ a circuit or the like having the same or similar configuration as a known service (SU) in a known repeater or the like, and therefore a detailed description thereof will be omitted. The service unit 22 transmits amplified radio waves from the service antenna 12 connected to the service unit 22. In this way, the service unit 22 can transmit radio waves to the wireless terminal UE via the service antenna 12.

[0026] As described above, the electronic device 1 according to an embodiment includes the donor antenna 11 and the service antenna 12. The electronic device 1 according to an embodiment relays radio waves received from the donor antenna 11 by transmitting the radio waves received from the donor antenna 11 from the service antenna 12. This allows the electronic device 1 according to an embodiment to relay radio waves received from a radio base station gNB or the like to, for example, a radio terminal UE or the like.

[0027] Next, before further explaining the electronic device 1 according to the embodiment, an electronic device according to a comparative example of the embodiment will be described.

[0028] Generally, in electronic devices that relay radio waves, such as repeaters, various numbers of donor antennas and service antennas (number of PAAMs) can be assumed. Furthermore, various arrangements of donor antennas and service antennas can be assumed in such electronic devices. Furthermore, miniaturization of such electronic devices is increasingly desired.

[0029] FIG. 4 is a diagram schematically illustrating a configuration of an electronic device according to a comparative example of the embodiment.

[0030] The donor antenna 11 or the service antenna 12 shown in Fig. 4 may radiate radio waves horizontally relative to the ground, similar to the situation shown in Fig. 3. That is, Fig. 4 may be a diagram showing the electronic device 100 as viewed from above, similar to Fig. 3. The Z axis shown in Fig. 4 may indicate, for example, the vertical direction. The X and Y axes shown in Fig. 4 may indicate, for example, the horizontal direction.

[0031] 4 , a configuration is assumed in which one donor antenna 11 and one service antenna 12 are disposed in the core case 40. In this manner, in one embodiment, the donor antenna 11 and the service antenna 12 may be disposed in the core case 40. The core case 40 may be configured to include, for example, at least a portion of a metal, but may also be configured of any material to which the donor antenna 11 and the service antenna 12 can be fixed.

[0032] 4, the donor antenna 11 is disposed in the core case 40 so that the direction of its main lobe ML1 is approximately parallel to the positive direction of the Y axis. The service antenna 12 is disposed in the core case 40 so that the direction of its main lobe ML2 is approximately parallel to the positive direction of the X axis.

[0033] As described above, the donor antenna 11 radiates not only the main lobe ML1 but also the side lobes SL1L and SL1R and the back lobe BL1. Similarly, the service antenna 12 radiates not only the main lobe ML2 but also the side lobes SL2L and SL2R and the back lobe BL2.

[0034] 4 , when the donor antenna 11 and the service antenna 12 are arranged close to each other in the core case 40, interference may occur between, for example, the back lobe BL1 of the donor antenna 11 and the back lobe BL2 of the service antenna 12. Therefore, when the donor antenna 11 and the service antenna 12 are arranged close to each other as in the electronic device 100 shown in FIG. 4 , it is expected that the radio waves radiated from the service antenna 12 will partially circumvent the donor antenna 11. If radio wave circumvention occurs in the transmission and reception of radio waves relayed by the electronic device 100 in this way, it may affect the relaying of radio waves by the electronic device 100. In such electronic devices that relay radio waves, it is desirable to minimize radio wave interference.

[0035] The electronic device 100 shown in FIG. 4 may be at least partially covered by a housing such as an outer case, for example, from the standpoint of protecting the donor antenna 11 and / or the service antenna 12 and making it waterproof (or splash-proof).

[0036] In this case, the outer case may at least partially cover the periphery of electronic device 100 shown in Fig. 4. The outer case may at least partially cover core case 40. Furthermore, the outer case may at least partially cover at least one of donor antenna 11 and service antenna 12.

[0037] In the electronic device 100 shown in FIG. 4 , the donor antenna 11 and the service antenna 12 are disposed in the core case 40. The donor antenna 11 and the service antenna 12 are disposed on either side of a corner of the core case 40. In this manner, the donor antenna 11 and the service antenna 12 may be disposed close to each other. However, the arrangement of the donor antenna 11 and the service antenna 12 is not limited to the manner shown in FIG. 4 . For example, the donor antenna 11 and the service antenna 12 may be disposed so that their radiation surfaces face in opposite directions. Even with this arrangement, if the donor antenna 11 and the service antenna 12 are disposed close to each other, interference may occur between the back lobe BL1 of the donor antenna 11 and the back lobe BL2 of the service antenna 12.

[0038] The outer case may also include a radome (antenna cover) at a location where radio waves are transmitted and received by the donor antenna 11 and / or the service antenna 12. In this way, the outer case may at least partially include a radome at a location that covers the donor antenna 11 or the service antenna 12. In this case, the radome may be configured to at least partially include a material that has high radio wave transmittance, such as glass fiber or a foaming agent.

[0039] The applicant has confirmed through simulations and experiments that in electronic device 100 having the structure shown in Fig. 4 , back lobe BL1 of service antenna 12 interferes with back lobe BL1 of donor antenna 11. That is, electronic device 100 having the structure shown in Fig. 4 may affect the relay of radio waves. Through simulations and experiments, it has been confirmed that in electronic device 100, radio waves emitted from one of donor antenna 11 and / or service antenna 12 interfere with the other via the inside of core case 40.

[0040] It is desirable to minimize the radio wave interference that occurs in the electronic device 100 shown in Fig. 4. Therefore, in the electronic device according to the embodiment described below, the shape or structure of the core case 40 is appropriately devised to reduce the occurrence of radio wave interference.

[0041] 5 to 7 are diagrams illustrating a structure of an electronic device according to an embodiment. Figures 5 to 7 are diagrams that schematically illustrate a cross section of the electronic device according to an embodiment. Figures 5 to 7 may be diagrams that illustrate a cross section of the electronic device parallel to the XY plane.

[0042] An electronic device according to an embodiment shown in Figures 5 to 7 will be described below. In particular, the description will focus on features of the electronic device according to an embodiment shown in Figures 5 to 7 that are different from the electronic device 100 shown in Figure 4. Descriptions of features of the electronic device according to an embodiment shown in Figures 5 to 7 that are similar to the electronic device 100 shown in Figure 4 will be appropriately simplified or omitted.

[0043] As shown in FIG. 5 , in the electronic device 1 according to an embodiment, the core case 40 may be configured to cover the surface of the donor antenna 11 and / or the service antenna 12 opposite the radio wave radiation surface, i.e., the ground surface. In this case, the core case 40 may be configured to at least partially contain metal. In the electronic device 1 according to an embodiment, the ground surface of the donor antenna 11 is covered by the core case 40, thereby eliminating or reducing the back lobe BL1 of the donor antenna 11. In addition, in the electronic device 1 according to an embodiment, the ground surface of the service antenna 12 is covered by the core case 40, thereby eliminating or reducing the back lobe BL2 of the service antenna 12. Therefore, the electronic device 1 according to an embodiment can reduce interference of the radio waves being relayed.

[0044] In one embodiment, the core case 40 may include a protrusion 42 as shown in FIG. 5 . The protrusion 42 of the core case 40 may be configured to allow the donor antenna 11 or the service antenna 12 to protrude from a portion of the core case 40 other than the protrusion 42. For example, the protrusion 42 may be arranged along at least a portion of the edge of the donor antenna 11 or the service antenna 12 or near the edge. By including the protrusion 42 in the core case 40, various electronic components such as ICs can be arranged on the ground surface side of the donor antenna 11 or the service antenna 12. In one embodiment, the shape, structure, size, etc. of the protrusion 42 are not limited to the embodiment shown in FIG. 5 and may be variously configured as needed.

[0045] Furthermore, by including, for example, an outer case, the electronic device 1 according to an embodiment can be expected to provide protection, dustproofing, and / or water-proofing for the donor antenna 11 and / or the service antenna 12. In this case, the outer case may include, for example, a radome (antenna cover) at a location where radio waves are transmitted and received by the donor antenna 11 and / or the service antenna 12. Furthermore, the core case 40 of the electronic device 1 according to an embodiment may include, for example, a radio wave absorber around the location where the donor antenna 11 and / or the service antenna 12 are disposed.

[0046] As described above, the electronic device 1 according to an embodiment may include the donor antenna 11, the service antenna 12, and the core case 40 in which the donor antenna 11 and the service antenna 12 are disposed. The electronic device 1 according to an embodiment relays radio waves received from the donor antenna 11 by transmitting the radio waves received from the donor antenna 11 from the service antenna 12. Furthermore, in the electronic device 1 according to an embodiment, the core case 40 may be configured to cover the ground surface on the opposite side to the radio wave emission surface of the donor antenna 11 or the service antenna 12.

[0047] 5 , in the electronic device 1 according to an embodiment, the core case 40 may include a protrusion 42 that allows the donor antenna 11 or the service antenna 12 to protrude. In this case, the protrusion 42 may be configured to form a space between the core case 40 and a ground surface on the opposite side of the radio wave radiation surface of the donor antenna 11 or the service antenna 12. In the electronic device 1 according to an embodiment, the core case 40 may be at least partially made of metal. The core case 40 may be configured to suppress a back lobe radiated from the ground surface on the opposite side of the radio wave radiation surface of the donor antenna 11 or the service antenna 12.

[0048] 5, the electronic device 1 according to the embodiment can reduce interference between the back lobe BL1 of the donor antenna 11 and the back lobe BL2 of the service antenna 12. Therefore, the electronic device 1 according to the embodiment can reduce interference of the relayed radio waves.

[0049] As shown in FIG. 6 , in the electronic device 2 according to an embodiment, similar to the electronic device 1 shown in FIG. 5 , the core case 40 may be configured to cover the surface of the donor antenna 11 and / or the service antenna 12 opposite the radio wave emission surface, i.e., the ground surface. In this case, the core case 40 may also be configured to at least partially contain metal. According to the electronic device 2 according to an embodiment, the ground surface of the donor antenna 11 is covered by the core case 40, thereby eliminating or reducing the back lobe BL1 of the donor antenna 11. Furthermore, according to the electronic device 2 according to an embodiment, the ground surface of the service antenna 12 is covered by the core case 40, thereby eliminating or reducing the back lobe BL2 of the service antenna 12. Therefore, the electronic device 2 according to an embodiment can reduce interference of the radio waves being relayed.

[0050] In one embodiment, the core case 40 may include a recess 44 as shown in FIG. 6 . The recess 44 of the core case 40 may be configured to at least partially accommodate or bury the donor antenna 11 or the service antenna 12. The recess 44 shown in FIG. 6 is configured to bury the entire donor antenna 11 or the service antenna 12 in the core case 40 except for the radiating surface. On the other hand, in one embodiment, the recess 44 may be configured to partially bury the donor antenna 11 or the service antenna 12 in the core case 40. For example, the recess 44 may be configured so that a side portion of the donor antenna 11 or the service antenna 12 is partially exposed outside the core case 40. The recess 44 may be formed, for example, to surround at least a portion of the edge or a portion near the edge of the donor antenna 11 or the service antenna 12. By providing the recess 44 in the core case 40, it is possible to prevent the radiating surface of the donor antenna 11 or the service antenna 12 from protruding from the core case 40, or to reduce the degree to which the radiating surface protrudes from the core case 40. In this case, various electronic components such as an IC may be disposed on the radiation surface side of the donor antenna 11 or the service antenna 12. In one embodiment, the shape, structure, size, etc. of the recess 44 are not limited to those shown in Fig. 6 and may be variously configured as necessary.

[0051] 5, the electronic device 2 according to the embodiment may also include, for example, an outer case and / or a radome. The core case 40 of the electronic device 2 according to the embodiment may also include, for example, a radio wave absorber around the position where the donor antenna 11 and / or the service antenna 12 are disposed.

[0052] As described above, in the electronic device 2 according to an embodiment, the core case 40 may be configured to cover the ground surface opposite the radio wave radiation surface of the donor antenna 11 or the service antenna 12. Also, as shown in FIG. 6 , in the electronic device 2 according to an embodiment, the core case 40 may include a recess 44 that at least partially buries the donor antenna 11 or the service antenna 12. In this case, the recess 44 may be configured to buries the portion of the donor antenna 11 or the service antenna 12 other than the radio wave radiation surface. Also, in the electronic device 1 according to an embodiment, the core case 40 may be at least partially made of metal. The core case 40 may be configured to suppress a back lobe radiated from the ground surface opposite the radio wave radiation surface of the donor antenna 11 or the service antenna 12.

[0053] 6, the electronic device 2 according to the embodiment can reduce interference between the back lobe BL1 of the donor antenna 11 and the back lobe BL2 of the service antenna 12. Therefore, the electronic device 1 according to the embodiment can reduce interference of the relayed radio waves.

[0054] As shown in FIG. 7 , in the electronic device 3 according to an embodiment, similar to the electronic device 1 shown in FIG. 5 , the core case 40 may be configured to cover the surface of the donor antenna 11 and / or the service antenna 12 opposite the radio wave emission surface, i.e., the ground surface. In this case, the core case 40 may also be configured to at least partially contain metal. According to the electronic device 3 according to an embodiment, the ground surface of the donor antenna 11 is covered by the core case 40, thereby eliminating or reducing the back lobe BL1 of the donor antenna 11. Furthermore, according to the electronic device 3 according to an embodiment, the ground surface of the service antenna 12 is covered by the core case 40, thereby eliminating or reducing the back lobe BL2 of the service antenna 12. Therefore, the electronic device 2 according to an embodiment can reduce interference of the radio waves being relayed.

[0055] In one embodiment, the core case 40 may include a recess 44 as shown in FIG. 7 . Hereinafter, in the description of the electronic device 3 shown in FIG. 7 , the recess 44 will be referred to as a "first recess 44" for convenience. The first recess 44 of the core case 40 may be configured to at least partially accommodate or bury the donor antenna 11 or the service antenna 12. The first recess 44 shown in FIG. 7 is configured to bury the entire donor antenna 11 or the service antenna 12 except for the radiation surface in the core case 40. On the other hand, in one embodiment, the first recess 44 may be configured to partially bury the donor antenna 11 or the service antenna 12 in the core case 40. For example, the first recess 44 may be configured so that a side portion of the donor antenna 11 or the service antenna 12 is partially exposed outside the core case 40. The first recess 44 may be formed, for example, to surround at least a portion of the edge or the vicinity of the edge of the donor antenna 11 or the service antenna 12. By providing the core case 40 with the first recess 44, it is possible to prevent the radiation surface of the donor antenna 11 or the service antenna 12 from protruding from the core case 40, or to reduce the degree to which the radiation surface protrudes from the core case 40. In one embodiment, the shape, structure, size, etc. of the first recess 44 are not limited to the aspect shown in Fig. 6, and various aspects can be adopted as necessary.

[0056] In one embodiment, the core case 40 may further include a second recess 46 in addition to the first recess 44, as shown in FIG. 7 . The peripheral diameter of the second recess 46 may be smaller than the peripheral diameter of the first recess 44 so that the edge of the donor antenna 11 or the service antenna 12 on the ground surface side is supported by the first recess 44. In one embodiment, the shape, structure, size, etc. of the second recess 46 are not limited to the embodiment shown in FIG. 7 and may be variously configured as needed. In the electronic device 3 according to one embodiment, the core case 40 includes the second recess 46, which allows various electronic components, such as ICs, to be disposed on the ground surface side of the donor antenna 11 or the service antenna 12.

[0057] 5, the electronic device 2 according to the embodiment may also include, for example, an outer case and / or a radome (antenna cover). The core case 40 of the electronic device 2 according to the embodiment may also include, for example, a radio wave absorber around the position where the donor antenna 11 and / or the service antenna 12 are disposed.

[0058] As described above, in the electronic device 3 according to an embodiment, the core case 40 may include a first recess 44 that at least partially buries the donor antenna 11 or the service antenna 12. In this case, the core case 40 may include a second recess 46 that forms a space between the core case 40 and the ground surface on the opposite side of the radio wave radiation surface of the donor antenna 11 or the service antenna 12. Furthermore, in the electronic device 1 according to an embodiment, the core case 40 may be at least partially made of metal. The core case 40 may be configured to suppress a back lobe radiated from the ground surface on the opposite side of the radio wave radiation surface of the donor antenna 11 or the service antenna 12.

[0059] 7, the electronic device 3 according to the embodiment can reduce interference between the back lobe BL1 of the donor antenna 11 and the back lobe BL2 of the service antenna 12. Therefore, the electronic device 1 according to the embodiment can reduce interference of the relayed radio waves.

[0060] Although the embodiments according to the present disclosure have been described based on the drawings and examples, it should be noted that those skilled in the art would easily be able to make various modifications or alterations based on the present disclosure. Therefore, it should be noted that these modifications and alterations are included within the scope of the present disclosure. For example, the functions included in each component or step can be rearranged so as not to be logically inconsistent, and multiple components or steps can be combined or divided into one.

[0061] The above-described electronic devices 1 to 3 have been described as each including one donor and one service. However, in an electronic device according to an embodiment, the number of donors and / or services is not limited to one donor and one service. In an electronic device according to an embodiment, the number of donors and / or services may be two or more. For example, an electronic device according to an embodiment may have a housing shaped like a rectangular prism, and PAAMs may be arranged on each of the four side surfaces of the rectangular prism. In this case, one of the four PAAMs may be configured as the donor antenna 11 and the remaining three as service antennas 12. Furthermore, in an electronic device according to an embodiment, instead of arranging a PAAM on each of the four side surfaces of a housing shaped like a rectangular prism, multiple PAAMs may be arranged on the side surfaces of a housing shaped like a cylinder, for example.

[0062] The above-described embodiment is not limited to implementation as the electronic device 1, etc. For example, the above-described embodiment may be implemented as a system including the electronic device 1, etc.

[0063] The above describes an electronic device according to an embodiment. However, the electronic device according to an embodiment may be implemented, for example, as follows, as long as there is no physical or logical contradiction. [Supplementary Note 1] An electronic device comprising: a donor antenna; a service antenna; and a core case in which the donor antenna and the service antenna are disposed, the electronic device relays radio waves by transmitting the radio waves received from the donor antenna from the service antenna, the core case being configured to cover a ground surface opposite to the radio wave radiation surface of the donor antenna or the service antenna. [Supplementary Note 2] The electronic device according to Supplementary Note 1, wherein the core case has a protrusion that allows the donor antenna or the service antenna to protrude. [Supplementary Note 3] The electronic device according to Supplementary Note 2, wherein the protrusion is configured to form a space between the ground surface and the core case. [Supplementary Note 4] The electronic device according to any one of Supplements 1 to 3, wherein the core case has a recess that at least partially buries the donor antenna or the service antenna. [Supplementary Note 5] The electronic device according to Supplementary Note 4, wherein the recess buries a portion of the donor antenna or the service antenna excluding the radio wave radiation surface. [Supplementary Note 6] The electronic device according to any one of Supplements 1 to 5, wherein the core case includes a first recess in which the donor antenna or the service antenna is at least partially buried, and a second recess in which a space is formed between the ground plane and the core case. [Supplementary Note 7] The electronic device according to any one of Supplements 1 to 6, wherein the core case is at least partially composed of metal. [Supplementary Note 8] The electronic device according to any one of Supplements 1 to 7, wherein the core case suppresses a back lobe radiated from the ground plane.

[0064] REFERENCE SIGNS LIST 1, 2, 3 Electronic device 11 Donor antenna 12 Service antenna 21 Donor unit (DU) 22 Service unit (SU) 30 Amplifier 40 Core case 42 Protrusion 44 Recess (first recess) 46 Recess (second recess)

Claims

1. An electronic device comprising: a donor antenna; a service antenna; and a core case in which the donor antenna and the service antenna are arranged, which relays radio waves by transmitting the radio waves received from the donor antenna from the service antenna, and wherein the core case is configured to cover the ground surface opposite to the radio wave radiation surface of the donor antenna or the service antenna.

2. The electronic device according to claim 1, wherein the core case has a protrusion through which the donor antenna or the service antenna protrudes.

3. The electronic device according to claim 2, wherein the protrusion is configured to form a space between the ground plane and the core case.

4. The electronic device according to any one of claims 1 to 3, wherein the core case has a recess in which the donor antenna or the service antenna is at least partially buried.

5. The electronic device according to claim 4, wherein the recess buries a portion of the donor antenna or the service antenna other than the surface from which the radio waves are emitted.

6. An electronic device according to any one of claims 1 to 5, wherein the core case has a first recess in which the donor antenna or the service antenna is at least partially buried, and a second recess that forms a space between the ground plane and the core case.

7. The electronic device according to any one of claims 1 to 6, wherein the core case is at least partially made of metal.

8. The electronic device according to any one of claims 1 to 7, wherein the core case suppresses a back lobe radiated from the ground plane.

Images