Radiation assembly and communication device

Abstract

The utility model provides a radiation assembly and communication equipment, the radiation assembly comprises a metal component and an antenna, the antenna comprises a dielectric substrate and a radiator, the radiator is suitable for being connected with a feed source to generate a radio frequency signal, the radiator comprises a body, a first extension part and a second extension part, and the body is arranged on the dielectric substrate; the first extension part is arranged on the body to extend a current path in the radiator; one end of the second extension part is arranged on the body, and the other end of the second extension part is electrically connected with the metal component so as to conduct the current in the radiator to the metal component. The radiation assembly provided by the utility model has the advantages of small size and small influence of the metal component on the radiation efficiency of the antenna.

Description

Technical Field

[0001] This application belongs to the field of communication technology, and more specifically, relates to a radiating component and a communication device. Background Technology

[0002] With the development of mobile communication products, more and more communication devices are becoming smaller and more complex. The internal environment of these devices is becoming increasingly complex, and some communication devices, such as smart locks and smart doorbells, have emerged with metal casings. The metal casing of these devices affects the efficiency of their internal antennas, making the antenna's working environment more demanding. In related technologies, both antenna size and the metal casing of communication devices impact antenna performance. Utility Model Content

[0003] The purpose of this application is to provide a radiating component and a communication device to solve the technical problems in the prior art where antenna size and the metal casing of the communication device affect antenna performance.

[0004] In one aspect, this application provides a radiating component.

[0005] The radiating assembly provided in this application includes a metal component and an antenna. The antenna includes a dielectric substrate and a radiator. The radiator is adapted to be connected to a feed source to generate a radio frequency signal. The radiator includes: a body disposed on the dielectric substrate; a first extension disposed on the body to extend the current path within the radiator; and a second extension, one end of which is disposed on the body and the other end of which is electrically connected to the metal component to conduct the current within the radiator to the metal component.

[0006] The beneficial effects of the radiating component provided in this application are as follows: Compared with the prior art, the radiating component provided in this application connects the radiator to the metal component through the second extension. On the one hand, the antenna can radiate electromagnetic waves outward through the metal component, which improves the radiation efficiency and reduces the impact of the metal component on the antenna performance. On the other hand, the electrical signal in the radiator can be conducted to the metal component, which extends the conduction path length of the electrical signal, thereby achieving low-frequency radiation without increasing the antenna size and realizing the miniaturization of the antenna.

[0007] In summary, the radiating component provided in this application has the advantages of small size and that the antenna radiation efficiency is less affected by the metal components.

[0008] Optionally, there are multiple bodies, including a first body and a second body, the first body and the second body are spaced apart, and both the first body and the second body are electrically connected to the feed source;

[0009] The first extension has at least one portion, and the first extension is disposed on at least one of the first body and the second body, and the second extension is disposed on the first body.

[0010] Optionally, the first body has a first protrusion, the second body has a second protrusion, and the first protrusion and the second protrusion are coupled together.

[0011] Optionally, the second extension includes an enlarged diameter section, the width of which gradually increases in a direction away from the first body.

[0012] Optionally, the body further includes a recessed portion that extends from the edge of the body toward the inner side of the body to extend the conduction path of the current in the radiator.

[0013] Optionally, the recess is located at the connection between the first extension and the body, and the extension direction of the recess is orthogonal to the arrangement direction of the first extension and the body.

[0014] Optionally, the first extension includes a plurality of reduced diameter segments, the plurality of reduced diameter segments being arranged in a direction away from the body, and the width of the plurality of reduced diameter segments decreasing sequentially in a direction away from the body.

[0015] Optionally, the end of the first extension away from the body is provided with a bent section, and the extension direction of the bent section is orthogonal to the extension direction of the first extension.

[0016] Optionally, the radiator has multiple input positions, which are located in the first extension or the main body. The input port can be located in any one of the multiple input positions. When the input port is located in different input positions, the current in the radiator has different path lengths.

[0017] Optionally, the antenna further includes a flexible substrate, and the second extension is disposed on the flexible substrate.

[0018] Secondly, this application also provides a communication device.

[0019] The communication equipment provided in this application includes the radiating component described in any of the above embodiments.

[0020] It is understandable that the beneficial effects of the second aspect mentioned above can be found in the relevant descriptions in the first aspect mentioned above, and will not be repeated here.

[0021] Optionally, the metal component forms at least a partial metal housing, the metal housing having an inner cavity with an opening, and the antenna being disposed on the side of the opening facing the inner cavity. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A schematic diagram of the antenna structure of the radiating component provided in the embodiments of this application. Figure 1 ;

[0024] Figure 2 A schematic diagram of the antenna structure of the radiating component provided in the embodiments of this application. Figure 2 ;

[0025] Figure 3 Schematic diagram of the communication device provided in the embodiments of this application Figure 1 ;

[0026] Figure 4 Schematic diagram of the communication device provided in the embodiments of this application Figure 2 ;

[0027] Figure 5 for Figure 4 A magnified view of a portion of point A in the middle;

[0028] Figure 6 A schematic diagram of radiation parameters of the radiating component provided in this application embodiment when the antenna is not connected to a metal component;

[0029] Figure 7 A schematic diagram of radiation parameters when the antenna of the radiating component provided in the embodiment of this application is connected to a metal component;

[0030] Figure 8 This is a schematic diagram showing the radiation parameters of the radiation component when the input port of the radiation component provided in the embodiments of this application is located in different positions.

[0031] The following are the labeling elements in the figure:

[0032] 100. Antenna;

[0033] 10. Dielectric substrate;

[0034] 20. Radiator; 21. Body; 211. First body; 2111. First recess; 2112. First protrusion; 212. Second body; 2121. Second recess; 2122. Third recess; 2123. Second protrusion; 22. First extension; 221. First part; 2211. First segment; 222. Second part; 2221. Narrowing segment; 2222. Second segment; 23. Second extension; 231. Widening segment;

[0035] 001, First position; 002, Second position; 003, Third position; 004, Fourth position;

[0036] 30. Flexible substrate;

[0037] 200. Metal components;

[0038] 300. Motherboard;

[0039] 400. Metal outer shell; 401. Inner cavity; 402. Opening. Detailed Implementation

[0040] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0041] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0042] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0044] This application provides a radiating component and a communication device using the above-mentioned radiating component. The radiating component is used to receive electrical signals from a feed source and radiate electromagnetic waves outward. The communication device provided by this application can be a wireless communication device using a metal casing, such as a smart door lock or a smart doorbell. At least part of the metal casing forms a metal component of the radiating component to reduce the impact of the metal casing on the radiation efficiency of the radiating component and improve the radiation efficiency of the radiating component.

[0045] Please refer to the following: Figure 1 and Figure 2 The radiation components provided in the embodiments of this application will now be described.

[0046] It should be noted that the first direction in the following text refers to the x-direction shown in the figure, and the second direction in the following text refers to the y-direction shown in the figure.

[0047] The radiating components provided in this application include a metal component 200 and an antenna 100.

[0048] Antenna 100 includes a dielectric substrate 10 and a radiator 20, the radiator 20 being adapted to be connected to a feed source to generate a radio frequency signal.

[0049] The dielectric substrate 10 may be made of one or more materials with low dielectric constant, such as FR4 (epoxy resin-based glass fiber composite material), RO4003C (glass cloth reinforced, ceramic-filled hydrocarbon material), etc.

[0050] like Figure 1 and Figure 2 As shown, the dielectric substrate 10 extends along the xOy plane shown in the figure. The radiator 20 is disposed on one side of the surface of the dielectric substrate 10. The radiator 20 is made of metal material. The radiator 20 is connected to the feed source. The electrical signal in the feed source can be conducted to the radiator 20 to excite electromagnetic oscillations in the radiator 20 and thus emit an electromagnetic beam.

[0051] The metal component 200 is made of metal and is arranged at a distance from the dielectric substrate 10. In some embodiments, the metal component 200 may be disposed on one or more sides of the dielectric substrate 10. In other embodiments, the metal component 200 may be sleeved on the outer periphery of the dielectric substrate 10.

[0052] The metal component 200 can be one or more components containing metal materials, such as the metal casing 400, metal heat sink, or printed circuit board.

[0053] The radiator 20 includes a body 21, a first extension 22, and a second extension 23.

[0054] The body 21 is disposed on the dielectric substrate 10. The first extension 22 is disposed on the body 21 to extend the current path in the radiator 20. One end of the second extension 23 is disposed on the body 21, and the other end of the second extension 23 is electrically connected to the metal component 200 to conduct the current in the radiator 20 to the metal component 200.

[0055] like Figure 2 As shown, the body 21 and the first extension 22 are both attached to the surface of the dielectric substrate 10. The first extension 22 extends from the edge of the body 21 in the first direction x or the second direction y. The current in the body 21 can be conducted from the body 21 to the end of the first extension 22 away from the body 21, thereby increasing the path length of the current conduction in the radiator 20 and reducing the resonant frequency of the radiator 20 to the radiation frequency band of the antenna 100.

[0056] like Figure 2 As shown, one end of the second extension 23 is electrically connected to the body 21, and the other end of the second extension 23 extends to be electrically connected to the metal component 200, so that electrical signals in the body 21 can be conducted to the metal component 200 through the second extension 23, thereby utilizing the conductive properties of the metal component 200 to excite the metal component 200 to also emit electromagnetic beams, such as... Figure 6 and Figure 7 As shown, connecting the antenna 100 to the metal component 200 can optimize the radiation parameters (S-parameters) of the antenna 100.

[0057] The beneficial effects of the radiating component provided in this application are as follows: The radiating component provided in this application connects the radiator 20 to the metal component 200 through the second extension 23. On the one hand, the antenna 100 can radiate electromagnetic waves outward through the metal component 200, which improves the radiation efficiency and reduces the impact of the metal component 200 on the performance of the antenna 100. On the other hand, the electrical signal in the radiator 20 can be conducted to the metal component 200, which extends the conduction path length of the electrical signal, thereby achieving low-frequency radiation without increasing the size of the antenna 100 and realizing the miniaturization of the antenna.

[0058] In summary, the radiating component provided in this application has the advantages of small size and the fact that the radiation efficiency of the antenna 100 is less affected by the metal component 200.

[0059] In some embodiments provided in this application, such as Figure 2 As shown, there are multiple bodies 21, including a first body 211 and a second body 212. The first body 211 and the second body 212 are arranged at intervals, and both the first body 211 and the second body 212 are electrically connected to the feed source.

[0060] The first extension 22 has at least one portion and is disposed on at least one of the first body 211 and the second body 212, and the second extension 23 is disposed on the first body 211.

[0061] like Figure 2 As shown, the body 21 includes a first body 211 and a second body 212. Both the first body 211 and the second body 212 are disposed on the surface of the dielectric substrate 10. Both the first body 211 and the second body 212 can be connected to the feed source so that the electrical signal in the feed source can propagate in the first body 211 and the second body 212 and radiate electromagnetic waves outward through the first body 211 and the second body 212.

[0062] In some embodiments, there is one first extension 22, which is disposed on the first body 211 or on the second body 212.

[0063] In other embodiments, there are multiple first extensions 22, and multiple first extensions 22 are disposed on the first body 211 or multiple first extensions 22 are disposed on the second body 212.

[0064] In other embodiments, such as Figure 2 As shown, there are multiple first extensions 22, a portion of which is disposed on the first body 211, and another portion of which is disposed on the second body 212.

[0065] like Figure 2 As shown, one end of the second extension 23 is connected to the first body 211, and the other end of the second extension 23 extends in a direction away from the dielectric substrate 10. This is to conduct electrical signals in the first body 211 to the metal component 200.

[0066] In some embodiments provided in this application, the first body 211 is provided with a first protrusion 2112, the second body 212 is provided with a second protrusion 2123, and the first protrusion 2112 and the second protrusion 2123 are coupled together.

[0067] Thus, on the one hand, the length of the current path in the first body 211 and the second body 212 can be increased by the first protrusion 2112 and the second protrusion 2123 respectively, thereby reducing the radiation frequency of the radiating component. On the other hand, the coupling of the first protrusion 2112 and the second protrusion 2123 can optimize the impedance matching of the radiator 20, thereby widening the bandwidth of the antenna 100.

[0068] In some embodiments provided in this application, the radiator 20 includes a first port and a second port. The first port is connected to the first body 211, and the second port is connected to the second body 212. Both the first port and the second port are connected to the feed source, and the first port and the second port are arranged adjacent to each other.

[0069] Therefore, as Figure 2 As shown, the first port and the second port are arranged opposite each other along the first direction x, and the first port and the second port are located between the first body 211 and the second body 212.

[0070] In some embodiments, the phase of the electrical signal input from the feed source to the first port is opposite to the phase of the electrical signal input from the feed source to the second port.

[0071] In some embodiments provided in this application, the second extension 23 includes an enlarged diameter section 231, the width of which gradually increases in a direction away from the first body 211.

[0072] like Figure 2 As shown, the width of the second extension 23 and the width of the expanded diameter section 231 are both their dimensions along the first direction x in the figure. The width of the end of the second extension 23 connected to the first body 211 is smaller than the width of the end of the second extension 23 connected to the metal component 200.

[0073] During the process of the electrical signal being conducted from the first body 211 through the second extension 23 to the metal component 200, the width of the second extension 23 gradually increases in the direction of electrical signal conduction, thereby causing the impedance of the second extension 23 to gradually decrease in the direction of electrical signal conduction.

[0074] Therefore, the impedance changes gradually during the transmission of electrical signals from the first body 211 to the metal component 200, which is conducive to achieving broadband matching, enabling the antenna 100 to effectively receive and transmit signals in a wider frequency band and improve the frequency coverage of the communication components.

[0075] In some embodiments provided in this application, the body 21 is further provided with a recessed portion, which extends from the edge of the body 21 toward the inner side of the body 21 to extend the conduction path of the current in the radiator 20.

[0076] like Figure 2 As shown, when current is conducted from one side of the recess to the other side of the recess, the current needs to bypass the recess, thereby increasing the conduction path length of the current in the radiator 20, and thus adjusting the resonant frequency of the radiator 20 and the radiation frequency of the radiating component.

[0077] In some embodiments provided in this application, a recess is provided at the connection between the first extension 22 and the body 21, and the extension direction of the recess is orthogonal to the arrangement direction of the first extension 22 and the body 21.

[0078] like Figure 2As shown, the first extension 22 includes a first part 221, which is disposed on one side of the first body 211 in the first direction x, and the first extension 22 is connected to the first body 211. The recess includes a first recess 2111, which is disposed between the first part 221 and the first body 211, and the first recess 2111 extends along the second direction y, thereby increasing the path length of the electrical signal in the first body 211 to the first part 221 through the first recess 2111.

[0079] like Figure 2 As shown, the first extension 22 also includes a second part 222, which is connected to the second body 212. The recessed part includes a second recess 2121 and a third recess 2122. The second recess 2121 is located at the connection between the second part 222 and the second body 212 and extends along the first direction x. The third recess 2122 is located at the connection between the second part 222 and the second body 212 and extends along the first direction x. The second recess 2121 and the third recess 2122 are staggered in the second direction y, thereby extending the path length of the electrical signal in the second body 212 to the second part 222.

[0080] In some embodiments provided in this application, the first extension 22 includes a plurality of reduced diameter segments 2221, which are arranged in a direction away from the body 21, and the width of the plurality of reduced diameter segments 2221 decreases sequentially in the direction away from the body 21.

[0081] It should be noted that the width of the reduced diameter section 2221 is the size of the reduced diameter section 2221 in the second direction y. When the electrical signal in the second body 212 is conducted through multiple reduced diameter sections 2221 to the second section 2222, the width of the reduced diameter section 2221 is the size of the reduced diameter section 2221 orthogonal to the direction of electrical signal conduction within the reduced diameter section 2221.

[0082] like Figure 2 As shown, the second part 222 includes multiple reduced diameter sections 2221. The reduced diameter sections 2221 extend along the first direction x. The width of the multiple reduced diameter sections 2221 is the size of the reduced diameter sections 2221 in the second direction y. The width of the multiple reduced diameter sections 2221 decreases sequentially along the direction away from the body 21.

[0083] Therefore, during the transmission of electrical signals from the second body 212 to the end of the second segment 2222, the impedance of the multiple reduced diameter segments 2221 gradually increases in the direction of current transmission, thereby optimizing the impedance matching effect of the second part 222, improving the radiation efficiency of the second part 222, and widening the bandwidth of the second part 222.

[0084] In some embodiments provided in this application, the end of the first extension 22 away from the body 21 is provided with a bent section, and the extension direction of the bent section is orthogonal to the extension direction of the first extension 22.

[0085] like Figure 2 As shown, the bent section includes a first section 2211 and a second section 2222. The first section 2211 is located at the end of the first part 221, which extends along the second direction y. The first section 2211 extends along the first direction x toward the second body 212. The second section 2222 is located at the end of the second part 222, which extends along the second direction y. The second section 2222 extends along the second direction y toward the first body 211.

[0086] Therefore, by setting the bending section, the current conduction path in the first extension 22 can be further increased. On the other hand, the impedance matching effect of the antenna 100 can be improved and the radiation efficiency of the antenna 100 can be improved through the coupling effect between the first segment 2211 and the second body 212 or the coupling effect between the second segment 2222 and the first body 211.

[0087] In some embodiments provided in this application, the radiator 20 has multiple input positions, which are located in the first extension or the body 21. The input port can be located in any one of the multiple input positions. When the input port is located in different input positions, the current in the radiator 20 has different path lengths.

[0088] like Figure 1 As shown, multiple input positions are arranged along the gap between the first body 211 and the second body 212, and the radiator 20 has a first position 001, a second position 002, a third position 003 and a fourth position 004 respectively. The first position 001, the second position 002, the third position 003 and the fourth position 004 are arranged along the extension direction of the gap between the first body 211 and the second body 212.

[0089] As shown in the figure, the current path in the radiator 20 is the longest path for the electrical signal input from the feed into the radiator 20 to be conducted in the radiator 20 when the input port is set at any input position. The positions of the first position 001, the second position 002, the third position 003, and the fourth position 004 on the first body 211 are all different, and the positions of the first position 001, the second position 002, the third position 003, and the fourth position 004 on the second body 212 are also different.

[0090] When the input port is in position 001 (first position), the S-parameters of the radiation component are: Figure 8 As shown in Figure a, when the input port is in the second position 002, the S-parameters of the radiating component are: Figure 8As shown in b, when the input port is in the third position 003, the S-parameters of the radiating component are: Figure 8 As shown in c, when the input port is located at position 004 (fourth position), the S-parameters of the radiating component are: Figure 8 As shown in d.

[0091] Therefore, as Figure 8 As shown, when the input port is located at different input positions, the current in the radiator 20 has different path lengths, so that the radiator 20 has different resonant frequencies, thereby enabling the radio frequency antenna 100 provided in this application to operate in different frequency bands.

[0092] In some embodiments provided in this application, the antenna 100 further includes a flexible substrate 30, and the second extension 23 is disposed on the flexible substrate 30.

[0093] like Figure 2 and Figure 5 As shown, the second extension 23 is combined with the flexible substrate 30 to form a flexible circuit board structure, so that the second extension 23 can be bent together with the flexible substrate 30, and the second extension 23 can be extended to the metal component 200 after bending.

[0094] The second extension 23 can be connected to the metal component 200 by means of screw connection, bonding connection, welding, etc.

[0095] The following is combined Figure 3 and Figure 4 Describe the communication device provided in this application.

[0096] The communication device provided in this application includes a metal housing 400 and a radiating component. The radiating component is the radiating component provided in any of the above embodiments, and at least a portion of the metal housing 400 forms the metal component 200 of the radiating component.

[0097] The radiating component provided in this application has the advantages of small size and the fact that the radiation efficiency of the antenna 100 is less affected by the metal component 200. Thus, the antenna 100 of the radiating component can use the metal shell 400 to radiate the beam outward, reducing the shielding effect of the metal shell 400 on the antenna 100 beam, thereby enabling the communication equipment provided in this application to have the advantage of high radiation efficiency.

[0098] In some embodiments provided in this application, the metal housing 400 has an inner cavity 401, the inner cavity 401 is provided with an opening 402, and the antenna 100 is provided on the side of the opening 402 facing the inner cavity 401.

[0099] like Figure 3 and Figure 4As shown, in some embodiments, the communication device further includes a motherboard 300, which is disposed in the cavity 401, and a feed source is disposed on the motherboard 300 to transmit electrical signals to the antenna 100 through the motherboard 300.

[0100] The antenna 100 is housed within the cavity 401 of the metal housing 400 to provide protection for the antenna 100 and prevent damage. However, the metal housing 400 also has a shielding effect on the beam radiated by the antenna 100. By opening an opening 402 in the metal housing 400 and placing the antenna 100 at the opening 402, the shielding effect of the metal housing 400 on the beam radiated by the antenna 100 can be effectively reduced, further improving the communication quality of the communication equipment.

[0101] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A radiating component, characterized in that, include: Metal components; An antenna, comprising a dielectric substrate and a radiator adapted to be connected to a feed source to generate a radio frequency signal, the radiator comprising: The body is disposed on the dielectric substrate; A first extension is provided in the body to extend the current path within the radiating body; The second extension has one end disposed on the body and the other end electrically connected to the metal component to conduct the current in the radiating body to the metal component.

2. The radiating component as described in claim 1, characterized in that: There are multiple bodies, including a first body and a second body. The first body and the second body are arranged at intervals, and both the first body and the second body are electrically connected to the feed source. The first extension has at least one portion, and the first extension is disposed on at least one of the first body and the second body, and the second extension is disposed on the first body.

3. The radiating component as described in claim 2, characterized in that: The first body has a first protrusion, and the second body has a second protrusion, with the first protrusion and the second protrusion coupled together.

4. The radiating component as described in claim 2, characterized in that: The second extension includes an enlarged diameter section, the width of which gradually increases in a direction away from the first body.

5. The radiating component as described in claim 1, characterized in that: The body also has a recessed portion, which extends from the edge of the body toward the inside of the body to extend the conduction path of the current in the radiator.

6. The radiating component as described in claim 5, characterized in that: The recessed portion is located at the connection between the first extension portion and the main body, and the extension direction of the recessed portion is orthogonal to the arrangement direction of the first extension portion and the main body.

7. The radiating component as claimed in claim 1, characterized in that: The first extension includes a plurality of tapered sections, which are arranged in a direction away from the body, and the width of the plurality of tapered sections decreases sequentially in the direction away from the body.

8. The radiating component as claimed in claim 1, characterized in that: The first extension has a bent section at its end away from the body, and the extension direction of the bent section is orthogonal to the extension direction of the first extension.

9. The radiating component as claimed in claim 1, characterized in that: The radiator has multiple input positions, which are located in the first extension or the main body. The input port of the radiating component is located in any one of the multiple input positions. When the input port is located in different input positions, the current in the radiator has different path lengths.

10. The radiating component as described in any one of claims 1-9, characterized in that: The antenna also includes a flexible substrate, and the second extension is disposed on the flexible substrate.

11. A communication device, characterized in that: Includes the radiation component as described in any one of claims 1-10.

12. The communication device as described in claim 11, characterized in that: The metal component forms at least a partial metal housing, the metal housing having an inner cavity with an opening, and the antenna being disposed on the side of the opening facing the inner cavity.

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