Radio frequency antenna and communication device

Abstract

The application provides a radio frequency antenna and a communication device. The radio frequency antenna comprises a substrate, a feed port and a radiator. The feed port is arranged on the substrate and is used for being connected with a signal source. The radiator is arranged on the substrate. The radiator comprises a first dipole and a second dipole. The feed port is connected between one end of the first dipole and one end of the second dipole. The first dipole and the second dipole are both bent and extended. The other end of the first dipole and the other end of the second dipole are away from each other along a first direction. A resonance part is coupled and connected with the first dipole and the second dipole. The radio frequency antenna provided by the application has the advantages of being capable of realizing double-frequency radiation and having a small size.

Description

Technical Field

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

[0002] A dual-band antenna is an antenna capable of operating simultaneously on two different frequency bands. Users can flexibly switch between different frequency bands without changing the antenna or equipment, meeting diverse communication needs. To balance coverage, penetration, transmission rate, and interference resistance, radio frequency antennas in related technologies typically operate in the 2.4-2.5 GHz & 5.15-5.85 GHz frequency bands. However, radio frequency antennas capable of operating simultaneously in these two frequency bands in related technologies are relatively large. Utility Model Content

[0003] The purpose of this application is to provide a radio frequency antenna and a communication device to solve the technical problem in the prior art that it is difficult to achieve dual-frequency radiation while miniaturizing the antenna.

[0004] In one aspect, embodiments of this application provide a radio frequency antenna.

[0005] The radio frequency antenna provided in this application includes a substrate; a feed port disposed on the substrate for connection to a signal source; a radiator disposed on the substrate, the radiator including: a first oscillator and a second oscillator, the feed port being connected between one end of the first oscillator and one end of the second oscillator, both the first oscillator and the second oscillator being bent and extended, and the other ends of the first oscillator and the other ends of the second oscillator being far apart from each other along a first direction; and a resonant part, the first oscillator being coupled to the resonant part, and the second oscillator being coupled to the resonant part.

[0006] The beneficial effects of the radio frequency antenna provided in this application embodiment are as follows: Compared with the prior art, on the one hand, the radio frequency antenna provided in this application embodiment extends the current path length within the first and second elements by bending and extending the first and second elements, thereby reducing the size of the first and second elements; on the other hand, both the first and second elements are coupled to a resonant section, and radiation at a frequency lower than that of the first and second elements is achieved through the resonant section, thereby realizing dual-frequency radiation. Therefore, the radio frequency antenna provided in this application embodiment has the advantages of being able to achieve dual-frequency radiation and having a small size.

[0007] Optionally, the side of the first oscillator away from the second oscillator is coupled to the resonant part;

[0008] And / or, the side of the second oscillator away from the first oscillator is coupled to the resonant part.

[0009] Optionally, the width of the first oscillator gradually decreases in the direction away from the feed port;

[0010] And / or, the width dimension of the second oscillator gradually decreases along the direction away from the feed port.

[0011] Optionally, the first oscillator includes a first arc segment located at the end of the first oscillator away from the second oscillator, and the second oscillator includes a second arc segment located at the end of the second oscillator away from the first oscillator;

[0012] The first arc segment and the second arc segment are arranged concentrically.

[0013] Optionally, the resonant part is provided with a groove, the opening of the groove faces the second direction, the second direction is orthogonal to the first direction, and both the first oscillator and the second oscillator are located in the groove.

[0014] Optionally, the first oscillator is coupled to the inner wall of the groove on the side away from the second oscillator in the first direction;

[0015] And / or, the second oscillator is coupled to the inner wall of the groove on the side away from the first oscillator in the first direction.

[0016] Optionally, the groove includes a first segment, in which at least a portion of the first oscillator and at least a portion of the second oscillator are located;

[0017] Wherein, the width dimension of the first segment in the first direction decreases along the direction from the bottom of the groove to the opening of the groove.

[0018] Optionally, the first segment includes multiple stepped segments, and the multiple stepped segments are arranged along the second direction;

[0019] In two adjacent stepped segments, the width of the segment closer to the opening of the groove in the first direction is smaller than the width of the segment closer to the bottom of the groove in the first direction.

[0020] Optionally, the groove further includes a second segment located between the opening of the groove and the first segment, wherein the width of the second segment in the first direction is greater than the width of any part of the first segment in the first direction.

[0021] Secondly, this application provides a communication device.

[0022] The communication device provided in this application includes the radio frequency antenna described in any of the above embodiments.

[0023] 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. Attached Figure Description

[0024] 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.

[0025] Figure 1 This is a schematic diagram of the structure of the radio frequency antenna provided in the first embodiment of this application;

[0026] Figure 2 This is a schematic diagram of the structure of the radio frequency antenna provided in the second embodiment of this application;

[0027] Figure 3 This is a schematic diagram of the structure of the radio frequency antenna provided in the third embodiment of this application;

[0028] Figure 4 This is a schematic diagram of the structure of the radio frequency antenna provided in the fourth embodiment of this application;

[0029] Figure 5 A schematic diagram of the reflection coefficient of a radio frequency antenna provided in an embodiment of this application;

[0030] Figure 6 A schematic diagram of the antenna efficiency of the radio frequency antenna provided in the embodiments of this application;

[0031] Figure 7 The radiation pattern of the radio frequency antenna provided in the embodiments of this application.

[0032] The following are the labeling elements in the figure:

[0033] 10. Substrate;

[0034] 20. Power supply port;

[0035] 30. Radiator; 31. First oscillator; 311. First arc segment; 312. First bent segment; 32. Second oscillator; 321. Second arc segment; 322. Second bent segment; 33. Resonant part; 34. Groove; 341. First segment; 342. Second segment. Detailed Implementation

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] This application provides a communication device that enables wireless communication by transmitting or receiving beams through its built-in radio frequency antenna. The communication device can be a portable communication device, a wireless router, a wireless access point (AP), etc.

[0041] The communication device provided in this application includes the radio frequency antenna provided in this application.

[0042] Please refer to the following: Figure 1 , Figure 2 , Figure 3 and Figure 4 The radio frequency antenna provided in the embodiments of this application will now be described.

[0043] 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.

[0044] The radio frequency antenna provided in this application includes a substrate 10, a feed port 20, and a radiator 30.

[0045] In some embodiments provided in this application, the radio frequency antenna provided in this application is a patch antenna, and the material of the substrate 10 may include 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.

[0046] In some of the above embodiments, the substrate 10 is FR4 (epoxy resin-based glass fiber composite material), and the relative permittivity of the dielectric substrate 10 is 4.4.

[0047] The power supply port 20 is located on the substrate 10 and is used to connect to the signal source.

[0048] The feeding method of the feed port 20 is one or more of coaxial probe feeding, microstrip line feeding, aperture coupling feeding, and slot coupling feeding. The feed port 20 is electrically connected to the signal source to conduct the electrical signal in the signal source to the radio frequency antenna.

[0049] The radiator 30 is disposed on the substrate 10. The radiator 30 includes a first oscillator 31, a second oscillator 32 and a resonant part 33.

[0050] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the radiator 30 is a printed patch, and the material of the radiator 30 is metals such as copper, aluminum, silver and their alloys. The radiator 30 is electrically connected to the feed port 20 so that the radiator 30 can generate electromagnetic oscillation under the excitation of the electrical signal in the feed port 20, thereby transmitting a beam.

[0051] The power supply port 20 is connected between one end of the first oscillator 31 and one end of the second oscillator 32. Both the first oscillator 31 and the second oscillator 32 are bent and extended, and the other ends of the first oscillator 31 and the other ends of the second oscillator 32 are far apart from each other along the first direction x.

[0052] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, both the first oscillator 31 and the second oscillator 32 are curved, meaning the length extension path of the first oscillator 31 is curved. This makes the current input to the first oscillator 31 at the power supply port 20 have a curved conduction path within the first oscillator 31, reducing the outer contour size of the first oscillator 31 without affecting the conduction path length of the electrical signal input to the first oscillator 31 at the power supply port 20. Similarly, the length extension path of the second oscillator 32 is curved, making the current input to the second oscillator 32 at the power supply port 20 have a curved conduction path within the second oscillator 32, reducing the outer contour size of the second oscillator 32 without affecting the conduction path length of the electrical signal input to the second oscillator 32 at the power supply port 20.

[0053] The end of the first element 31 away from the feed port 20 and the end of the second element 32 away from the feed port 20 are arranged along the first direction x. The path length of the electrical signal conducted from the feed port 20 to the first element 31 within the first element 31 can be an integer multiple of a quarter wavelength of the electrical signal within the feed port 20. The path length of the electrical signal conducted from the feed port 20 to the second element 32 within the second element 32 can be an integer multiple of a quarter wavelength of the electrical signal within the feed port 20. Thus, the first element 31, the second element 32, and the feed port 20 form a dipole antenna structure.

[0054] The first oscillator 31 is coupled to the resonant part 33, and the second oscillator 32 is coupled to the resonant part 33.

[0055] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, one part of the first oscillator 31 is connected to the power supply port 20, and the other part of the first oscillator 31 is coupled to the resonant part 33. When the power supply port 20 inputs an electrical signal into the first oscillator 31, the electrical signal is conducted along the first oscillator 31 to the resonant part 33, and the electrical signal is conducted in the resonant part 33.

[0056] One part of the second oscillator 32 is connected to the power supply port 20, and the other part of the second oscillator 32 is coupled to the resonant part 33. When the power supply port 20 inputs an electrical signal into the second oscillator 32, the electrical signal is conducted along the second oscillator 32 to the resonant part 33, and the electrical signal is conducted in the resonant part 33.

[0057] Since the first oscillator 31 and the second oscillator 32 extend away from each other, and the resonant part 33 is coupled to both the first oscillator 31 and the second oscillator 32, it can be understood that the size of the resonant part 33 in the first direction x is larger than the length of the first oscillator 31 and the length of the second oscillator 32, so that the resonant frequency of the resonant part 33 is greater than the resonant frequency of the first oscillator 31 and the second oscillator 32, thereby realizing dual-frequency communication through the first oscillator 31, the second oscillator 32 and the resonant part 33.

[0058] The beneficial effects of the radio frequency antenna provided in this application embodiment are as follows: Compared with the prior art, on the one hand, the radio frequency antenna provided in this application embodiment increases the current path length within the first oscillator 31 and the second oscillator 32 by bending and extending the first oscillator 31 and the second oscillator 32, thereby reducing the size of the first oscillator 31 and the second oscillator 32; on the other hand, both the first oscillator 31 and the second oscillator 32 are coupled and connected to the resonant part 33, and radiation with a frequency lower than that of the first oscillator 31 and the second oscillator 32 is achieved through the resonant part 33, thereby realizing dual-frequency radiation. Therefore, the radio frequency antenna provided in this application embodiment has the advantages of being able to achieve dual-frequency radiation and having a small size.

[0059] The radio frequency antenna provided in this application embodiment enables miniaturized multi-frequency broadband operation by employing a dipole structure composed of a bent and extended first oscillator 31 and a second oscillator 32, and a bent and gradually widened resonant section 33 structure.

[0060] Firstly, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the overall size of the radio frequency antenna provided in this application embodiment is relatively small, with a size of 25mm in the first direction x and 11mm in the second direction y. Compared with the dual-band omnidirectional antenna in the related art, the size of the radio frequency antenna provided in this application embodiment is reduced by 65.5%.

[0061] Secondly, such as Figure 5 As shown, the radio frequency antenna provided in this application embodiment has a reflection coefficient of less than 9.6dB in both the 2.4GHz-2.5GHz band and the 5.15GHz-5.85GHz band.

[0062] Thirdly, such as Figure 6 As shown, the radio frequency antenna provided in this application embodiment has a radiation efficiency of more than 77% in the low frequency 2.4GHz-2.5GHz band and a radiation efficiency of more than 94% in the 5.15GHz-5.85GHz band.

[0063] In some embodiments provided in this application, such as Figure 1 , Figure 3 and Figure 4 As shown, the arrangement direction of the end of the first oscillator 31 connected to the power supply port 20 and the end of the second oscillator 32 connected to the power supply port 20 has an angle with the first direction x.

[0064] In other embodiments provided in this application, such as Figure 2 As shown, the end of the first oscillator 31 connected to the power supply port 20 and the end of the second oscillator 32 connected to the power supply port 20 are arranged along the first direction x.

[0065] In some other embodiments provided in this application (not shown in the figures), the end of the first oscillator 31 connected to the power supply port 20 and the end of the second oscillator 32 connected to the power supply port 20 are arranged along the second direction y.

[0066] In some embodiments provided in this application, the side of the first oscillator 31 away from the second oscillator 32 is coupled to the resonant part 33, and the side of the second oscillator 32 away from the first oscillator 31 is coupled to the resonant part 33.

[0067] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, when the electrical signal in the feed port 20 is conducted to the resonant section 33 through the first oscillator 31, the electrical signal is conducted in a direction away from the second oscillator 32. When the electrical signal in the feed port 20 is conducted to the resonant section 33 through the second oscillator 32, the electrical signal is conducted in a direction away from the first oscillator 31. This increases the length of the electrical signal's conduction path in the resonant section 33, causing the resonant frequency of the resonant section 33 to shift to a lower frequency, thereby achieving miniaturization of the radio frequency antenna.

[0068] In other embodiments (not shown in the figures), the side of the first oscillator 31 away from the second oscillator 32 is coupled to the resonant part 33, while the side of the second oscillator 32 away from the first oscillator 31 is not coupled to the resonant part 33.

[0069] In other embodiments (not shown in the figures), the side of the second oscillator 32 away from the first oscillator 31 is coupled to the resonant part 33, while the side of the first oscillator 31 away from the second oscillator 32 is not coupled to the resonant part 33.

[0070] In some embodiments provided in this application, the first oscillator 31 and the second oscillator 32 form a forked structure, that is, the distance between one end of the first oscillator 31 and one end of the second oscillator 32 is less than the distance between the other end of the first oscillator 31 and the other end of the second oscillator 32, which extends the effective length of the electrical signal conduction path in the first oscillator 31 and the second oscillator 32, so that the radio frequency antenna can resonate at a lower frequency, thereby further realizing the miniaturization of the radio frequency antenna.

[0071] In some embodiments provided in this application, the width of the first oscillator 31 gradually decreases in the direction away from the feed port 20, and the width of the second oscillator 32 gradually decreases in the direction away from the feed port 20.

[0072] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the width of the first oscillator 31 is the dimension of the first oscillator 31 in the direction orthogonal to the direction in which the electrical signal is conducted within the first oscillator 31, and the width of the second oscillator 32 is the dimension of the second oscillator 32 in the direction orthogonal to the direction in which the electrical signal is conducted within the second oscillator 32. By gradually reducing the width of the first oscillator 31 and the second oscillator 32 along the direction in which the electrical signal is conducted within the first oscillator 31 or the second oscillator 32, the input impedance of the first oscillator 31 or the second oscillator 32 can be better matched with the feed port 20. On the one hand, this reduces the reflection loss of the first oscillator 31 or the second oscillator 32 and improves the radiation efficiency of the RF antenna. On the other hand, it reduces the impedance change of the first oscillator 31 or the second oscillator 32 at different frequencies, thereby widening its operating bandwidth.

[0073] In other embodiments (not shown in the figures), the width of the first oscillator 31 gradually decreases in the direction away from the power supply port 20, while the width of the second oscillator 32 does not gradually decrease in the direction away from the power supply port 20.

[0074] In other embodiments (not shown in the figures), the width of the second oscillator 32 gradually decreases in the direction away from the power supply port 20, while the width of the first oscillator 31 does not gradually decrease in the direction away from the power supply port 20.

[0075] In some embodiments provided in this application, the first oscillator 31 includes a first arc segment 311, which is located at the end of the first oscillator 31 away from the second oscillator 32, and the second oscillator 32 includes a second arc segment 321, which is located at the end of the second oscillator 32 away from the first oscillator 31.

[0076] The first arc segment 311 and the second arc segment 321 are arranged concentrically, and the center of the first arc segment 311 is located on the side of the first oscillator 31 facing the resonant part 33.

[0077] like Figure 1 , Figure 2 and Figure 3 As shown, the portion of the first oscillator 31 that is away from the second oscillator 32 extends along an arc to form a first arc segment 311, and the portion of the second oscillator 32 that is away from the first oscillator 31 extends along an arc to form a second arc segment 321. The first arc segment 311 and the second arc segment 321 extend along the same arc with the same center and radius.

[0078] Therefore, in the first aspect, the arc-shaped structure of the first arc segment 311 or the second arc segment 321 adjusts the input impedance of the first oscillator 31 or the second oscillator 32 by extending the equivalent electrical length of the current path, such as... Figure 5As shown, this reduces reflection loss; secondly, the arc design of the first oscillator 31 or the second oscillator 32 can alleviate current surges near the feed port 20 and reduce impedance discontinuities, such as... Figure 6 As shown, this improves the efficiency of the radio frequency antenna. Thirdly, as... Figure 7 As shown, the arc design of the first oscillator 31 or the second oscillator 32 can adjust the beamwidth and gain of the radiation pattern of the radio frequency antenna.

[0079] In other embodiments provided in this application, such as Figure 4 As shown, the end of the first oscillator 31 away from the feed port 20 includes a first bent segment 312 extending along the first direction x. One end of the first bent segment 312 is coupled to the resonant part 33. The other end of the first bent segment 312 extends along the first direction x toward the second oscillator 32. The end of the second oscillator 32 away from the feed port 20 includes a second bent segment 322 extending along the first direction x. One end of the second bent segment 322 is coupled to the resonant part 33. The other end of the second bent segment 322 extends along the first direction x toward the first oscillator 31.

[0080] Therefore, on the one hand, by setting the first bending segment 312 and the second bending segment 322, the tortuosity of the transmission path of the electrical signal in the first oscillator 31 or the second oscillator 32 is increased, thereby extending the transmission path of the electrical signal in the first oscillator 31 or the second oscillator 32, causing the resonant point of the first oscillator 31 or the second oscillator 32 to shift to a lower frequency, and further realizing the miniaturization of the radio frequency antenna.

[0081] In some embodiments provided in this application, the resonant part 33 is provided with a groove 34, the groove opening of the groove 34 faces the second direction y, the second direction y is orthogonal to the first direction x, and the first oscillator 31 and the second oscillator 32 are both located in the groove 34.

[0082] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the groove 34 is located on one side of the resonant part 33 in the second direction y. The groove 34 has a groove opening and a groove bottom. The groove opening and groove bottom of the groove 34 are arranged along the second direction y. The first oscillator 31, the second oscillator 32 and the feed port 20 are all located in the groove 34.

[0083] Thus, on the one hand, by placing the first oscillator 31, the second oscillator 32, and the feed port 20 in the groove 34, the outer contour size of the radiator 30 can be reduced, thereby achieving miniaturization of the radio frequency antenna. On the other hand, by setting the groove 34 in the resonant part 33, the tortuosity of the transmission path of the electrical signal in the resonant part 33 is increased, thereby extending the transmission path of the electrical signal in the resonant part 33 and causing the resonant point of the resonant part 33 to shift to a lower frequency, further achieving miniaturization of the radio frequency antenna.

[0084] In some embodiments provided in this application, the first oscillator 31 is coupled to the inner wall of the groove 34 on one side in the first direction x, and the second oscillator 32 is coupled to the inner wall of the groove 34 on the other side in the first direction x.

[0085] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the first oscillator 31 is coupled to the inner wall of the groove 34 on the side away from the second oscillator 32 in the first direction x. This allows the electrical signal conducted through the first oscillator 31 to enter the resonant part 33 and then conduct along the side away from the second oscillator 32 in the first direction x, thereby increasing the tortuosity of the conduction path of the electrical signal conducted through the first oscillator 31 to the resonant part 33 within the resonant part 33.

[0086] Similarly, the second oscillator 32 is coupled to the inner wall of the groove 34 on the side away from the first oscillator 31 in the first direction x, so that the electrical signal conducted through the second oscillator 32 to the resonant part 33 enters the resonant part 33 and is first conducted along the side away from the first oscillator 31 in the first direction x, thereby increasing the tortuosity of the conduction path of the electrical signal conducted through the second oscillator 32 to the resonant part 33 in the resonant part 33.

[0087] Therefore, by increasing the tortuosity of the transmission path of the electrical signal in the resonant section 33, the transmission path of the electrical signal in the resonant section 33 is lengthened, causing the resonant point of the resonant section 33 to shift to a lower frequency, thereby further realizing the miniaturization of the radio frequency antenna.

[0088] In other embodiments, the first oscillator 31 is coupled to the inner wall of the groove 34 on one side in the first direction x, but the second oscillator 32 is not coupled to the inner wall of the groove 34 on the other side in the first direction x.

[0089] In other embodiments, the second oscillator 32 is coupled to the inner wall of the groove 34 on one side in the first direction x, but the first oscillator 31 is not coupled to the inner wall of the groove 34 on the other side in the first direction x.

[0090] In some embodiments provided in this application, the groove 34 includes a first segment 341, and at least a portion of the first oscillator 31 and at least a portion of the second oscillator 32 are located within the first segment 341;

[0091] Among them, the width dimension of the first segment 341 in the first direction x decreases along the direction from the bottom of the groove 34 to the opening of the groove 34.

[0092] In some embodiments, such as Figure 1 and Figure 2As shown, the end of the first oscillator 31 away from the power supply port 20 extends into the first segment 341, and the end of the second oscillator 32 away from the power supply port 20 extends into the first segment 341.

[0093] In other embodiments, such as Figure 3 As shown, the first oscillator 31, the second oscillator 32, and the power supply port 20 are all located entirely within the first segment 341.

[0094] like Figure 1 , Figure 2 and Figure 3 As shown, the first segment 341 is arranged near the bottom of the groove 34. The width of the first segment 341 is the distance between the inner wall of the first segment 341 on one side in the first direction x and the inner wall of the first segment 341 on the other side in the first direction x. The width of the first segment 341 decreases along the direction toward the groove opening of the groove 34, thereby improving the capacitive coupling efficiency between the first oscillator 31, the second oscillator 32 and the resonant part 33, thereby improving the radiation efficiency of the radio frequency antenna provided in this application embodiment.

[0095] In some embodiments provided in this application, the first segment 341 includes multiple stepped segments, which are arranged along the second direction y.

[0096] In two adjacent stepped segments, the width of the groove closer to the opening of the groove 34 in the first direction x is smaller than the width of the groove closer to the bottom of the groove 34 in the first direction x.

[0097] like Figure 1 and Figure 2 As shown, the width of the first segment 341 decreases in the direction of the second direction y toward the slot opening, thereby reducing the width of the resonant part 33 in the first direction x toward the direction of the second direction y toward the bottom of the slot. By setting multiple stepped segments, the width of the resonant part 33 in the first direction x decreases in a stepped manner in the direction of the second direction y toward the bottom of the slot. This combines the advantages of a gradient structure with the simplicity of discrete design, enabling impedance matching at multiple frequency points.

[0098] In some embodiments provided in this application, the groove 34 further includes a second segment 342, which is located between the opening of the groove 34 and the first segment 341. The width of the second segment 342 in the first direction x is greater than the width of any part of the first segment 341 in the first direction x.

[0099] like Figure 1 and Figure 2 As shown, the width of the second segment 342 in the first direction x is greater than the width of the first segment 341 in the first direction x, so that the width of the groove 34 first decreases and then increases along the direction from the bottom of the groove to the opening of the groove.

[0100] 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 radio frequency antenna, characterized in that, include: substrate; A power supply port is located on the substrate and is used to connect to a signal source; A radiator is disposed on the substrate, the radiator comprising: A first oscillator and a second oscillator, wherein the power supply port is connected between one end of the first oscillator and one end of the second oscillator, both the first oscillator and the second oscillator are bent and extended, and the other ends of the first oscillator and the other ends of the second oscillator are far apart from each other along a first direction; The resonant section is provided, wherein the first oscillator is coupled to the resonant section, and the second oscillator is coupled to the resonant section.

2. The radio frequency antenna as described in claim 1, characterized in that: The side of the first oscillator furthest from the second oscillator is coupled to the resonant part; And / or, the side of the second oscillator away from the first oscillator is coupled to the resonant part.

3. The radio frequency antenna as described in claim 1, characterized in that: The width of the first oscillator gradually decreases along the direction away from the feed port; And / or, the width dimension of the second oscillator gradually decreases along the direction away from the feed port.

4. The radio frequency antenna as described in claim 1, characterized in that: The first oscillator includes a first arc segment located at the end of the first oscillator away from the second oscillator, and the second oscillator includes a second arc segment located at the end of the second oscillator away from the first oscillator; The first arc segment and the second arc segment are arranged concentrically.

5. The radio frequency antenna as described in any one of claims 1-4, characterized in that: The resonant part is provided with a groove, the opening of the groove faces the second direction, the second direction is orthogonal to the first direction, and both the first oscillator and the second oscillator are located in the groove.

6. The radio frequency antenna as described in claim 5, characterized in that: The first oscillator is coupled to the inner wall of the groove on the side away from the second oscillator in the first direction; And / or, the second oscillator is coupled to the inner wall of the groove on the side away from the first oscillator in the first direction.

7. The radio frequency antenna as described in claim 5, characterized in that: The groove includes a first segment, in which at least a portion of the first oscillator and at least a portion of the second oscillator are located; Wherein, the width dimension of the first segment in the first direction decreases along the direction from the bottom of the groove to the opening of the groove.

8. The radio frequency antenna as described in claim 7, characterized in that: The first segment includes multiple stepped segments, which are arranged along the second direction; In two adjacent stepped segments, the width of the segment closer to the opening of the groove in the first direction is smaller than the width of the segment closer to the bottom of the groove in the first direction.

9. The radio frequency antenna as described in claim 7, characterized in that: The groove further includes a second segment, which is located between the opening of the groove and the first segment. The width of the second segment in the first direction is greater than the width of any part of the first segment in the first direction.

10. A communication device, characterized in that: Includes the radio frequency antenna as described in any one of claims 1-9.

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