Radio frequency antenna and communication device

Abstract

The application belongs to the technical field of communication, and provides a radio frequency antenna and a communication device. The radio frequency antenna comprises a dielectric substrate and at least two radiation units. The radiation unit comprises a first radiation section and two second radiation sections arranged in parallel and at intervals. The first radiation section and the two second radiation sections all extend along a first direction, and the two second radiation sections are respectively located on both sides of the first radiation section in a second direction. The second direction is orthogonal to the first direction. The first radiation section and the second radiation section are both used for being connected with a radio frequency signal source. The at least two radiation units comprise at least one first unit and at least one second unit. The first radiation section of the first unit is connected with the two second radiation sections of the second unit, and the two second radiation sections of the first unit are connected with the first radiation section of the second unit. The radio frequency antenna provided by the application has the advantage of higher gain.

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 linear antenna is an antenna composed of one or more metal wires with a diameter much smaller than the wavelength and a length comparable to the wavelength. Linear antennas have a simple structure and high space utilization, which allows them to meet the electrical length requirements for resonance in long-wave, medium-wave, short-wave, and ultra-short-wave bands at a relatively low cost. This enables linear antennas to be used in long-wave, medium-wave, short-wave, and ultra-short-wave band communications.

[0003] However, linear antennas in related technologies suffer from low gain. Summary of the Invention

[0004] The purpose of this application is to provide a radio frequency antenna and a communication device to solve the technical problem of low gain in existing linear antennas.

[0005] In a first aspect, embodiments of this application provide a radio frequency antenna.

[0006] The radio frequency antenna provided in this application embodiment includes at least two radiating elements on a dielectric substrate. Each radiating element includes a first radiating segment and two second radiating segments arranged in parallel and spaced apart. The first radiating segment and the two second radiating segments are both disposed on the surface of the dielectric substrate. The first radiating segment and the two second radiating segments extend along a first direction, and the two second radiating segments are respectively located on both sides of the first radiating segment in a second direction. The second direction is orthogonal to the first direction. Both the first radiating segment and the second radiating segment are used to connect to a radio frequency signal source. The current direction input to the two second radiating segments of the radio frequency signal source is the same, and the current direction input to the first radiating segment of the radio frequency signal source is opposite to the current direction input to the second radiating segment of the radio frequency signal source. The length dimension of the first radiating segment in the first direction is within half the wavelength of the electrical signal in the radio frequency signal source, and the length dimension of the second radiating segment in the first direction is within half the wavelength of the electrical signal in the radio frequency signal source. The at least two radiating elements include at least one first element and at least one second element. The first radiating segment of the first element is connected to the two second radiating segments of the second element, and the two second radiating segments of the first element are connected to the first radiating segment of the second element.

[0007] The beneficial effects of the radio frequency antenna provided in this application embodiment are as follows: Compared with the prior art, the first radiating segment and two second radiating segments in the radiating element of the radio frequency antenna provided in this application embodiment together constitute a waveguide transmission line structure, and the current in the first radiating segment can only cancel a part of the current in the second radiating segment, so that the whole composed of the first radiating segment and the two second radiating segments exhibits radiation characteristics in the same direction as the second radiating segment. At least two radiating elements are connected, the current direction in the first radiating segment of the first element is opposite to the current direction in the second radiating segment of the second element, and the current direction in the second radiating segment of the first element is opposite to the current direction in the first radiating segment of the second element, so that the current direction in the second radiating segment of the first element is the same as the current direction in the second radiating segment of the second element, thereby enabling the second radiating segments in multiple radiating elements to generate unidirectional radiation that can be superimposed to improve the gain, so that the radio frequency antenna provided in this application embodiment has the advantage of high gain. Optionally, the dielectric substrate includes a first surface and a second surface arranged parallel to each other along a third direction, the third direction being orthogonal to the first direction and the second direction, and the first surface being parallel to the orthogonal plane of the third direction; wherein, The first radiating segment of the first unit is disposed on one of the first surface and the second surface, and the second radiating segment of the first unit is disposed on the other of the first surface and the second surface. And / or, the first radiating segment of the second unit is disposed on one of the first surface and the second surface, and the second radiating segment of the second unit is disposed on the other of the first surface and the second surface.

[0008] Optionally, the first radiating segment of the first unit and the second radiating segment of the second unit are both disposed on the second surface, and the first radiating segment of the second unit and the second radiating segment of the first unit are both disposed on the first surface.

[0009] Optionally, a plurality of the radiation units are arranged along a first direction, with at least two first units and at least two second units, the first units and the second units being arranged alternately along the first direction, and adjacent first units and second units being connected.

[0010] Optionally, the radio frequency antenna includes a first feed section disposed on the first surface. The first feed section is connected to the ends of two second radiating segments of the radiating elements at one end of the plurality of radiating elements in the first direction. The first feed section is used to connect to a radio frequency signal source. The radio frequency antenna also includes a second feed section that penetrates the dielectric substrate in a third direction. One end of the second feed section is disposed on the first surface and is used to connect to the radio frequency signal source. The other end of the second feed section penetrates the dielectric substrate in the third direction and is connected to the ends of the first radiating segments of the radiating elements at one end of the plurality of radiating elements in the first direction.

[0011] Optionally, one of the plurality of radiating units located at one end in the first direction includes a matching branch, the matching branch being connected to the end of the first radiating segment within the radiating unit, and the matching branch being electrically connected to both second radiating segments within the radiating unit via vias on the dielectric substrate.

[0012] Optionally, the radio frequency antenna includes a first connecting portion and a second connecting portion, wherein the first connecting portion is connected between the first radiating segment of the first unit and one second radiating segment of the second unit, and the second connecting portion is connected between the first radiating segment of the first unit and another second radiating segment of the second unit; The radio frequency antenna includes a third connection portion and a fourth connection portion. The third connection portion is connected between the first radiating segment of the second unit and one of the second radiating segments of the first unit, and the fourth connection portion is connected between the first radiating segment of the second unit and another of the second radiating segments of the first unit.

[0013] Optionally, the radiating element includes a grounding bridge, which connects two second radiating segments within the same radiating element, and the grounding bridge is arranged at intervals from the first radiating segments within the same radiating element.

[0014] Optionally, the radiating unit includes a grounding bridge connected to the first radiating segment. The grounding bridge extends along the second direction, with both ends of the grounding bridge extending to the two ends of the first radiating segment in the second direction. The two ends of the grounding bridge are respectively stacked and spaced apart from two second radiating segments within the same radiating unit.

[0015] Secondly, this application provides a communication device.

[0016] The communication device provided in this application includes the radio frequency antenna described in any of the above embodiments.

[0017] 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

[0018] 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.

[0019] Figure 1 This is a schematic diagram of the structure of the first surface of the radio frequency antenna provided in Embodiment 1 of this application; Figure 2 This is a schematic diagram of the structure of the second surface of the radio frequency antenna provided in Embodiment 1 of this application; Figure 3 A schematic diagram of the reflection coefficient of a radio frequency antenna provided in an embodiment of this application; Figure 4 A schematic diagram of the average gain of the radio frequency antenna in the yOz plane provided in the embodiments of this application; Figure 5 A schematic diagram illustrating the radiation efficiency of a radio frequency antenna provided in an embodiment of this application; Figure 6 Schematic diagrams of the reflection coefficient curves of the radio frequency antenna provided in the embodiments of this application when a grounding bridge is provided and when no grounding bridge is provided; Figure 7 This is a schematic diagram of the structure of the first surface of the radio frequency antenna provided in Embodiment 2 of this application.

[0020] The following are the labeling elements in the figure: 100. Radio frequency antenna; 10. Dielectric substrate; 11. First surface; 12. Second surface; 20. Radiation unit; 201. First unit; 202. Second unit; 21. First radiation segment; 22. Second radiation segment; 23. Grounding bridge; 24. Matching branch; 31. First power supply unit; 32. Second power supply unit; 41. First connecting part; 42. Second connecting part; 43. Third connecting part; 44. Fourth connecting part; x, first direction; y, second direction; z, third direction. Detailed Implementation

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] A linear antenna is an antenna composed of one or more metal wires with a diameter much smaller than the wavelength and a length comparable to the wavelength. Linear antennas have a simple structure and high space utilization, which allows them to meet the electrical length requirements for resonance in long-wave, medium-wave, short-wave, and ultra-short-wave bands at a relatively low cost. This enables linear antennas to be used in long-wave, medium-wave, short-wave, and ultra-short-wave band communications.

[0026] However, the linear antennas in related technologies reduce the influence of reverse current by bending the structure, sacrificing bandwidth for gain. As the number of elements increases, the gain increase effect weakens significantly, resulting in a problem of low gain.

[0027] To address the aforementioned technical problems, embodiments of this application provide a radio frequency antenna and a communication device using the radio frequency antenna. The second radiating segment within multiple radiating elements of the radio frequency antenna provided in this application generates unidirectional radiation that can be superimposed to each other to improve gain, thus giving the radio frequency antenna provided in this application the advantage of higher gain.

[0028] Please refer to the following: Figure 1 and Figure 2 The radio frequency antenna 100 provided in the embodiments of this application will now be described.

[0029] The radio frequency antenna 100 provided in this application embodiment includes a dielectric substrate 10 and at least two radiating elements 20.

[0030] In some embodiments, the dielectric substrate 10 is made of at least one of the following: epoxy glass fiber copper clad laminate (FR-4), liquid crystal polymer (LCP), polyimide (PI), polytetrafluoroethylene (PTFE), bismaleimide triazine (BT), polyphenylene ether (PPO), epoxy resin (EP), alumina (AlO) and aluminum nitride (AlN), borosilicate glass and fused silica / quartz glass, and ceramic-filled hydrocarbon.

[0031] The radiation unit 20 includes a first radiation segment 21 and two second radiation segments 22 arranged in parallel. The first radiation segment 21 and the two radiation segments 22 are both disposed on the surface of the dielectric substrate 10. The first radiation segment 21 and the two second radiation segments 22 extend along the first direction x, and the two second radiation segments 22 are respectively located on both sides of the first radiation segment 21 in the second direction y, which is orthogonal to the first direction x.

[0032] like Figure 1 and Figure 2 As shown, the orthogonal projection of the first radiating segment 21 on the third direction z is located between the orthogonal projections of the two second radiating segments 22 on the third direction z, and the first radiating segment 21 and the second radiating segment 22 are arranged at intervals so that the first radiating segment 21 and the two second radiating segments 22 on both sides of it on the second direction y form a waveguide transmission structure, that is, the current on the first radiating segment 21 and the current on the two second radiating segments 22 are in opposite directions.

[0033] Both the first radiating segment 21 and the second radiating segment 22 are used to connect to the radio frequency signal source. The current direction of the radio frequency signal source input to the two second radiating segments 22 is the same, and the current direction of the radio frequency signal source input to the first radiating segment 21 is opposite to the current direction of the radio frequency signal source input to the second radiating segment 22.

[0034] The length of the first radiating segment 21 in the first direction x is within half the wavelength of the electrical signal in the radio frequency signal source, and the length of the second radiating segment 22 in the first direction x is within half the wavelength of the electrical signal in the radio frequency signal source.

[0035] The length of the first radiating segment 21 in the first direction x is greater than half the wavelength corresponding to the maximum frequency of the electrical signal in the radio frequency signal source, and the length of the first radiating segment 21 in the first direction x is less than half the wavelength corresponding to the minimum frequency of the electrical signal in the radio frequency signal source. The length of the second radiating segment 22 in the first direction x is greater than half the wavelength corresponding to the maximum frequency of the electrical signal in the radio frequency signal source, and the length of the second radiating segment 22 in the first direction x is less than half the wavelength corresponding to the minimum frequency of the electrical signal in the radio frequency signal source.

[0036] Therefore, the electrical signals in the radio frequency signal source can generate currents in opposite directions in the first radiation segment 21 or the second radiation segment 22, so that the radiation fields after the current on the first radiation segment 21 and part of the current on the second radiation segment 22 are superimposed in the far field cancel each other out, so that the whole composed of the first radiation segment 21 and the two second radiation segments 22 exhibits radiation characteristics in the same direction as the second radiation segment 22.

[0037] In some embodiments, the operating frequency band of the electrical signal within the radio frequency signal source is 5.150 GHz to 5.850 GHz.

[0038] In other embodiments, the operating frequency band of the electrical signals within the radio frequency signal source is 2.400 GHz to 2.4835 GHz.

[0039] At least two radiation units 20 include at least one first unit 201 and at least one second unit 202, wherein the first radiation segment 21 of the first unit 201 is connected to the two second radiation segments 22 of the second unit 202, and the two second radiation segments 22 of the first unit 201 are connected to the first radiation segment 21 of the second unit 202.

[0040] The current generated in the first unit 201 and the second unit 202 is as follows Figure 1 and Figure 2 As shown in the figure, the current direction in the first radiation segment 21 of the first unit 201 is the same as the current direction in the first radiation segment 21 of the second unit 202, and the current direction in the second radiation segment 22 of the first unit 201 is the same as the current direction in the second radiation segment 22 of the second unit 202, so that the radiation generated by the first unit 201 can be superimposed with the radiation generated by the second unit 202, thereby increasing the gain of the radio frequency antenna 100.

[0041] The beneficial effects of the radio frequency antenna 100 provided in this application embodiment are as follows: Compared with the prior art, the first radiating segment 21 and the two second radiating segments 22 in the radiating element 20 of the radio frequency antenna 100 provided in this application embodiment together constitute a waveguide transmission line structure, and the current in the first radiating segment 21 can only cancel a part of the current in the second radiating segment 22, so that the whole composed of the first radiating segment 21 and the two second radiating segments 22 presents the same radiating characteristic as the second radiating segment 22. At the same time, at least two radiating elements 20 are connected, the current direction in the first radiating segment 21 of the first element 201 is opposite to the current direction in the second radiating segment 22 of the second element 202, and the current direction in the second radiating segment 22 of the first element 201 is opposite to the current direction in the first radiating segment 21 of the second element 202, so that the current direction in the second radiating segment 22 of the first element 201 is the same as the current direction in the second radiating segment 22 of the second element 202, thereby enabling the second radiating segments 22 in multiple radiating elements 20 to generate unidirectional radiation that can be superimposed to improve the gain, so that the radio frequency antenna 100 provided in this application embodiment has the advantage of high gain.

[0042] like Figure 3 As shown, the radio frequency antenna 100 provided in this embodiment has a reflection coefficient of less than -10dB in the 5.150GHz-5.850GHz frequency band. Figure 4 As shown, the RF antenna 100 provided in this embodiment has an average gain greater than 5 dBi in the 5.150 GHz-5.850 GHz frequency band. Figure 5 As shown, the RF antenna 100 provided in this application embodiment has a radiation efficiency greater than 0.91 at the 5.2 GHz frequency point and a radiation efficiency greater than 0.9 at the 5.8 GHz frequency point, indicating that the RF antenna 100 provided in this application embodiment has a low reflection coefficient and high gain and radiation efficiency.

[0043] In some embodiments provided in this application, such as Figure 1 and Figure 2 As shown, the dielectric substrate 10 includes a first surface 11 and a second surface 12 arranged parallel to each other along a third direction z. The third direction z is orthogonal to the first direction x and the third direction z is orthogonal to the second direction y. The first surface 11 is parallel to the orthogonal plane of the third direction z.

[0044] The first radiating segment 21 of the first unit 201 is disposed on one of the first surface 11 and the second surface 12, and the second radiating segment 22 of the first unit 201 is disposed on the other of the first surface 11 and the second surface 12. And / or, the first radiation segment 21 of the second unit 202 is disposed on one of the first surface 11 and the second surface 12, and the second radiation segment 22 of the second unit 202 is disposed on the other of the first surface 11 and the second surface 12.

[0045] In some embodiments, such as Figure 1 and Figure 2 As shown, the first radiating segment 21 and the second radiating segment 22 of the first unit 201 are respectively located on the two surfaces of the dielectric substrate 10, so that the first radiating segment 21 and the two second radiating segments 22 in the first unit 201 constitute an out-of-plane waveguide transmission structure, and the first radiating segment 21 and the second radiating segment 22 of the second unit 202 are respectively located on the two surfaces of the dielectric substrate 10, so that the first radiating segment 21 and the two second radiating segments 22 in the second unit 202 constitute an out-of-plane waveguide transmission structure.

[0046] Thus, both the first unit 201 and the second unit 202 form a heterogeneous waveguide transmission structure. On the one hand, this facilitates the adjustment of the impedance of the RF antenna 100 during the design phase. On the other hand, the heterogeneous waveguide transmission structure can broaden the bandwidth of the RF antenna 100 and further improve the gain of the RF antenna 100 provided in this embodiment.

[0047] In some other embodiments (not shown in the figures), the first radiating segment 21 and the second radiating segment 22 of the first unit 201 are located on two surfaces of the dielectric substrate 10, so that the first radiating segment 21 and the two second radiating segments 22 in the first unit 201 constitute an out-of-plane waveguide transmission structure, and the first radiating segment 21 and the second radiating segment 22 of the second unit 202 are both located on the same surface of the dielectric substrate 10.

[0048] In some other embodiments (not shown in the figures), the first radiating segment 21 and the second radiating segment 22 of the second unit 202 are located on two surfaces of the dielectric substrate 10, so that the first radiating segment 21 and the two second radiating segments 22 in the second unit 202 constitute an out-of-plane waveguide transmission structure, and the first radiating segment 21 and the second radiating segment 22 of the first unit 201 are both located on the same surface of the dielectric substrate 10.

[0049] In some other embodiments provided in this application (not shown in the figures), the first radiation segment 21 and the second radiation segment 22 of the first unit 201 are disposed on the same surface, and the first radiation segment 21 and the second radiation segment 22 of the second unit 202 are disposed on the same surface.

[0050] In some embodiments provided in this application, such as Figure 1 and Figure 2As shown, the first radiation segment 21 of the first unit 201 and the second radiation segment 22 of the second unit 202 are both disposed on the second surface 12, and the first radiation segment 21 of the second unit 202 and the second radiation segment 22 of the first unit 201 are both disposed on the first surface 11.

[0051] This facilitates the direct connection of the first radiation segment 21 of the first unit 201 and the second radiation segment 22 of the second unit 202, and also facilitates the direct connection of the first radiation segment 21 of the second unit 202 and the second radiation segment 22 of the first unit 201.

[0052] In some embodiments provided in this application, such as Figure 1 and Figure 2 As shown, multiple radiation units 20 are arranged along the first direction x. There are at least two first units 201 and at least two second units 202. The first units 201 and the second units 202 are arranged alternately along the first direction x, and adjacent first units 201 and second units 202 are connected.

[0053] Multiple radiating elements 20 are alternately arranged and interconnected along a first direction x, thereby achieving series feeding of the multiple radiating elements 20 through a single feeding port. In some embodiments, such as... Figure 1 and Figure 2 As shown, there are three first units 201 and three second units 202. The gain of the radio frequency antenna 100 provided in this application embodiment is improved by setting the radiation of the six radiating units 20 to be superimposed.

[0054] In some embodiments provided in this application, such as Figure 1 and Figure 2 As shown, the radio frequency antenna 100 includes a first feed section 31, which is disposed on the first surface 11. The first feed section 31 is connected to the ends of two second radiating segments 22 of one of the plurality of radiating elements 20 in the first direction x. The first feed section 31 is used to connect to a radio frequency signal source.

[0055] like Figure 1 and Figure 2 As shown, the first feed section 31 extends along the second direction y. The first feed section 31 and two second radiating segments 22 within the same radiating unit 20 are located on the same surface. One end of the first feed section 31 in the second direction y is connected to the end of one second radiating segment 22 within the same radiating unit 20 that is away from the other radiating unit 20. The other end of the first feed section 31 in the second direction y is connected to the end of another second radiating segment 22 within the same radiating unit 20 that is away from the other radiating unit 20. The middle section of the first feed section 31 in the second direction y is used to connect to a radio frequency signal source, thereby synchronously transmitting the radio frequency signal to the two second radiating segments 22, so that the two second radiating segments 22 within the radiating unit 20 at the ends form a shape as shown in the image. Figure 1 and Figure 2 The current shown in figure a.

[0056] In some embodiments provided in this application, such as Figure 1 and Figure 2 As shown, the radio frequency antenna 100 includes a second feed section 32, which penetrates the dielectric substrate 10 along a third direction z. One end of the second feed section 32 is disposed on the first surface 11 and is used to connect to a radio frequency signal source. The other end of the second feed section 32 penetrates the dielectric substrate 10 along a third direction z and is connected to the end of the first radiating segment 21 of one of the plurality of radiating elements 20 in the first direction x.

[0057] In some embodiments (not shown in the figures), the dielectric substrate 10 includes a through hole that penetrates the dielectric substrate 10 along a third direction z. A second power supply portion 32 is disposed in the through hole. One end of the second power supply portion 32 is disposed on the first surface 11 and connected to one end of the first radiation segment 21 of the radiation unit 20 at one end of the array composed of multiple radiation units 20. The other end of the second power supply portion 32 is located on the second surface 12 and is used to connect to a radio frequency signal source to conduct electrical signals into the radiation unit 20.

[0058] Thus, the coaxial line is connected to one end of the radiating element 20 in the array composed of multiple radiating elements 20, so that the radio frequency signal is conducted to at least two radiating elements 20 through series feeding to achieve unidirectional radiation. The middle section of the first feeding part 31 in the second direction y and the second feeding part 32 are arranged along the first direction x, and the first feeding part 31 and the second feeding part 32 are located on the same surface of the dielectric substrate 10, which facilitates the welding of the first feeding part 31 to the shielding layer of the coaxial line and the welding of the second feeding part 32 to the core wire of the coaxial line. The radio frequency antenna 100 provided in this application embodiment is electrically connected to the radio frequency signal source through the coaxial line.

[0059] In some embodiments, both the core wire and the shielding layer of the coaxial cable are connected to a radio frequency (RF) signal source. The electrical signal input to the first feed section 31 and the electrical signal input to the second feed section 32 of the RF signal source are out of phase, so that the first radiating section 21 and the second radiating section 22 form as shown in the figure. Figure 1 and Figure 2 The reverse current is represented by 'a' in the figure.

[0060] In some embodiments provided in this application, such as Figure 1 and Figure 2 As shown, one of the multiple radiating units 20 located at one end in the first direction x includes a matching branch 24, which is connected to the end of the first radiating segment 21 in the radiating unit 20, and the matching branch 24 is electrically connected to the two second radiating segments 22 in the radiating unit 20 through vias.

[0061] like Figure 1 and Figure 2 As shown, the matching branch 24 extends along the second direction y, and the matching branch 24 is located in one of the radiation units 20 at the end furthest from the coaxial line in the array composed of multiple radiation units 20. The matching branch 24 is arranged in the same layer as and connected to the first radiation segment 21 of the radiation unit 20. The orthographic projection of part of the matching branch 24 in the third direction z coincides with the orthographic projection of the second radiation segment 22 in the third direction z, and the matching branch 24 is connected to the two second radiation segments 22 through vias.

[0062] Therefore, by setting matching stubs 24 to directly connect the first radiating segment 21 of the radiating element 20 furthest from the coaxial line to the two second radiating segments 22, a current loop is provided to optimize the impedance of the radio frequency antenna 100 provided in this embodiment.

[0063] In some embodiments provided in this application, such as Figure 1 and Figure 2 As shown, the radio frequency antenna 100 includes a first connecting part 41 and a second connecting part 42. The first connecting part 41 is connected between a first radiating segment 21 of the first unit 201 and a second radiating segment 22 of the second unit 202, and the second connecting part 42 is connected between the first radiating segment 21 of the first unit 201 and another second radiating segment 22 of the second unit 202.

[0064] The radio frequency antenna 100 includes a third connection part 43 and a fourth connection part 44. The third connection part 43 is connected between the first radiating segment 21 of the second unit 202 and a second radiating segment 22 of the first unit 201, and the fourth connection part 44 is connected between the first radiating segment 21 of the second unit 202 and another second radiating segment 22 of the first unit 201.

[0065] like Figure 1 and Figure 2 As shown, the first radiating segment 21 of a first unit 201 is directly connected to the two second radiating segments 22 of a second unit 202 via the first connecting part 41 and the second connecting part 42. The two second radiating segments 22 of the second unit 202 are directly connected to the first radiating segment 21 of the first unit 201 via the third connecting part 43 and the fourth connecting part 44, so that the first unit 201 and the second unit 202 can form a structure as shown in the diagram. Figure 1 and Figure 2 The current represented by 'a' in the figure.

[0066] In some embodiments provided in this application, such as Figure 1 and Figure 2As shown, the radiation unit 20 includes a grounding bridge 23, which connects two second radiation segments 22 within the same radiation unit 20, and the grounding bridge 23 is arranged at intervals from the first radiation segment 21 within the same radiation unit 20.

[0067] like Figure 1 and Figure 2 As shown, the first radiating segment 21 and the second radiating segment 22 within a single radiating unit 20 are arranged on opposite sides, and the grounding bridge 23 is arranged on the same side as the two second radiating segments 22 and connected between the two second radiating segments 22. Figure 6 Curve I in the figure represents the reflection coefficient curve of the radio frequency antenna 100 in an embodiment where no grounding bridge 23 is provided between the two second radiating segments 22. Figure 6 Curve II in the figure represents the reflection coefficient curve of the radio frequency antenna 100 in an embodiment where a grounding bridge 23 is provided between the two second radiating segments 22. Figure 6 As can be seen, connecting the grounding bridge 23 between the two second radiating segments 22 within the same radiating element 20 can effectively reduce the reflection coefficient and further improve the gain of the radio frequency antenna 100 provided in this embodiment.

[0068] In other embodiments provided in this application, such as Figure 7 As shown, the radiating unit 20 includes a grounding bridge 23, which is connected to the first radiating segment 21. The grounding bridge 23 extends along the second direction y, and its two ends extend to the two ends of the first radiating segment 21 in the second direction y. The two ends of the grounding bridge 23 are respectively stacked and spaced apart from two second radiating segments 22 in the same radiating unit 20.

[0069] Therefore, the grounding bridge 23 and the first radiating segment 21 are disposed on the same surface of the dielectric substrate 10, and the grounding bridge 23 can be coupled with the second radiating segment 22, thereby reducing the reflection coefficient and increasing the gain of the radio frequency antenna 100.

[0070] The communication device provided in the embodiments of this application is described below.

[0071] The communication device provided in this application includes the radio frequency antenna 100 in any of the above embodiments.

[0072] The communication device provided in this application embodiment can be any one of a portable communication device, a wireless router, or a wireless communication node.

[0073] Because the radio frequency antenna 100 provided in this application embodiment has high radiation efficiency and gain, the communication device provided in this application embodiment has high communication efficiency and a large communication range.

[0074] 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: Dielectric substrate; At least two radiating units, each radiating unit comprising a first radiating segment and two second radiating segments arranged in parallel and spaced apart, both the first and second radiating segments being disposed on the surface of the dielectric substrate, both extending along a first direction, and the two second radiating segments being located on opposite sides of the first radiating segment in a second direction, the second direction being orthogonal to the first direction, both the first and second radiating segments being connected to a radio frequency (RF) signal source, the RF signal source inputting currents into the two second radiating segments having the same direction, and the RF signal source inputting currents into the first radiating segment having the opposite direction to the RF signal source inputting currents into the second radiating segments, the length of the first radiating segment in the first direction being within half the wavelength of the electrical signal within the RF signal source, and the length of the second radiating segment in the first direction being within half the wavelength of the electrical signal within the RF signal source; The at least two radiation units include at least one first unit and at least one second unit, wherein the first radiation segment of the first unit is connected to two second radiation segments of the second unit, and the two second radiation segments of the first unit are connected to the first radiation segment of the second unit.

2. The radio frequency antenna as described in claim 1, characterized in that: The dielectric substrate includes a first surface and a second surface arranged parallel to each other along a third direction, the third direction being orthogonal to the first direction and the second direction, and the first surface being parallel to a plane orthogonal to the third direction; wherein... The first radiating segment of the first unit is disposed on one of the first surface and the second surface, and the second radiating segment of the first unit is disposed on the other of the first surface and the second surface. And / or, the first radiating segment of the second unit is disposed on one of the first surface and the second surface, and the second radiating segment of the second unit is disposed on the other of the first surface and the second surface.

3. The radio frequency antenna as described in claim 2, characterized in that: The first radiation segment of the first unit and the second radiation segment of the second unit are both disposed on the second surface, and the first radiation segment of the second unit and the second radiation segment of the first unit are both disposed on the first surface.

4. The radio frequency antenna as described in claim 2, characterized in that: The plurality of said radiating elements are arranged along a first direction, with at least two first elements and at least two second elements, the first elements and the second elements are arranged alternately along the first direction, and adjacent first elements are connected to second elements.

5. The radio frequency antenna as described in claim 4, characterized in that: The radio frequency antenna includes a first feed section disposed on the first surface. The first feed section is connected to the ends of two second radiating segments of the radiating elements at one end of the plurality of radiating elements in the first direction. The first feed section is used to connect to a radio frequency signal source. The radio frequency antenna also includes a second feed section that penetrates the dielectric substrate in a third direction. One end of the second feed section is disposed on the first surface and is used to connect to the radio frequency signal source. The other end of the second feed section penetrates the dielectric substrate in the third direction and is connected to the ends of the first radiating segments of the radiating elements at one end of the plurality of radiating elements in the first direction.

6. The radio frequency antenna as described in claim 4, characterized in that: One of the plurality of radiation units located at one end in the first direction includes a matching branch, the matching branch being connected to the end of the first radiation segment within the radiation unit, and the matching branch being electrically connected to two second radiation segments within the radiation unit via vias on the dielectric substrate.

7. The radio frequency antenna as described in any one of claims 1-6, characterized in that: The radio frequency antenna includes a first connecting part and a second connecting part. The first connecting part is connected between the first radiating segment of the first unit and one second radiating segment of the second unit, and the second connecting part is connected between the first radiating segment of the first unit and another second radiating segment of the second unit. The radio frequency antenna includes a third connection portion and a fourth connection portion. The third connection portion is connected between the first radiating segment of the second unit and one of the second radiating segments of the first unit, and the fourth connection portion is connected between the first radiating segment of the second unit and another of the second radiating segments of the first unit.

8. The radio frequency antenna as described in any one of claims 1-6, characterized in that: The radiating unit includes a grounding bridge, which connects two second radiating segments within the same radiating unit, and the grounding bridge is arranged at intervals from the first radiating segments within the same radiating unit.

9. The radio frequency antenna as described in any one of claims 1-6, characterized in that: The radiating unit includes a grounding bridge connected to the first radiating segment. The grounding bridge extends along the second direction, with both ends of the grounding bridge extending to the two ends of the first radiating segment in the second direction. The two ends of the grounding bridge are respectively stacked and spaced apart from two second radiating segments within the same radiating unit.

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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