Radio frequency antenna and communication device

Abstract

The utility model provides a radio frequency antenna and communication equipment, the radio frequency antenna comprises a substrate, an antenna assembly and a filtering assembly, and the substrate comprises a first surface and a second surface which are arranged back to back; the antenna assembly is arranged on at least one of the first surface and the second surface, and the antenna assembly is suitable for working in a plurality of frequency bands; the filtering assembly is arranged on the first surface, one end of the filtering assembly is connected with the antenna assembly, the filtering assembly is provided with a plurality of interfaces, and resonant frequencies between the interfaces and the antenna assembly are different, so that signals of a plurality of frequency bands are output through the plurality of interfaces. The radio frequency antenna provided by the utility model has the advantages of simple structure and low processing cost.

Description

Technical Field

[0001] The present application belongs to the technical field of communication equipment, and more specifically, to a radio frequency antenna and communication equipment. Background Art

[0002] The dual-band antenna uses a duplexer to transmit and receive signals of two different frequencies through a single antenna. The duplexer separates the different output / input signals in the antenna so that the communication device can operate in different frequency bands through a single antenna.

[0003] However, the antenna and duplexer of the dual-frequency antenna in the related art have complex structures and high processing costs. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a radio frequency antenna and a communication device to solve the technical problems of complex structures and high processing costs of antennas and duplexers of dual-frequency antennas in the prior art.

[0005] In a first aspect, the present application provides a radio frequency antenna, comprising a substrate, the substrate comprising a first surface and a second surface arranged opposite to each other; an antenna component, the antenna component being arranged on at least one of the first surface and the second surface, the antenna component being suitable for operating in multiple frequency bands; a filter component, the filter component being arranged on the first surface, one end of the filter component being connected to the antenna component, the filter component being provided with multiple interfaces, the resonant frequencies between the interfaces and the antenna component being different, so as to output signals of multiple frequency bands through the multiple interfaces.

[0006] The beneficial effect of the RF antenna provided in the present application is that: compared with the prior art, the antenna component and the filter component of the RF antenna of the present application are arranged on the surface of the same substrate, which simplifies the structure of the duplexer and the antenna on the one hand, and simplifies the processing technology of the duplexer and the antenna on the other hand. The connection between the duplexer and the antenna can be achieved by processing the duplexer and the antenna on the same substrate, thereby reducing the processing cost of the duplexer and the antenna.

[0007] Optionally, the filtering component includes a first interface and a second interface, a first resonance unit is provided between the first interface and the antenna component, and a second resonance unit is provided between the second interface and the antenna component, and the resonance frequencies of the first resonance unit and the second resonance unit are different so as to filter out signals of different frequencies respectively.

[0008] Optionally, the filtering component includes a first connection connected between the first interface and the antenna component, the first resonance unit is coupled or directly connected to the first connection, and the filtering component also includes a second connection connected between the second interface and the antenna component, and the second resonance unit is coupled or directly connected to the second connection.

[0009] Optionally, the antenna assembly includes a first radiation branch and a second radiation branch, the resonance frequency of the second resonance unit is within the operating frequency band of the first radiation branch, and the resonance frequency of the first resonance unit is within the operating frequency band of the second radiation branch.

[0010] Optionally, the second resonance unit includes a plurality of resonance branches, and the resonance frequencies of the plurality of resonance branches are different and are all located within the working frequency band of the first radiation branch.

[0011] Optionally, an operating frequency band of the first radiation branch is higher than an operating frequency band of the second radiation branch, the first resonance unit is coupled to the first wiring, and the second resonance unit is directly connected to the second wiring.

[0012] Optionally, the length of the first resonance unit along the extension direction of the first wire is 1 / 2 of the wavelength corresponding to the resonance frequency of the first resonance unit, and the length of the second resonance unit along the extension direction of the second wire is 1 / 4 of the wavelength corresponding to the resonance frequency of the second resonance unit.

[0013] Optionally, the antenna assembly includes a first radiation unit and a second radiation unit, the first radiation unit is arranged on the first surface, the second radiation unit is arranged on the second surface, part of the first radiation unit and part of the second radiation unit are coupled to each other, and the filtering assembly is connected to the first radiation unit.

[0014] Optionally, the second radiation unit further includes a microstrip unit, and the microstrip unit and the filter component are stacked along the arrangement direction of the first surface and the second surface;

[0015] At least part of the first wiring and the microstrip unit form a microstrip line structure, and / or at least part of the second wiring and the microstrip unit form a microstrip line structure.

[0016] In a second aspect, the present application proposes a communication device, comprising the radio frequency antenna described in any one of the above embodiments.

[0017] It can be understood that the beneficial effects of the second aspect mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 A schematic diagram of the structure of the radio frequency antenna provided in an embodiment of the present application;

[0020] Figure 2 A schematic diagram of the structure of the radio frequency antenna provided in an embodiment of the present application on the first surface;

[0021] Figure 3 A schematic diagram of the structure of the radio frequency antenna provided in an embodiment of the present application on the second surface;

[0022] Figure 4 (a) is a schematic diagram of the gain of the radio frequency antenna provided in the WiFi 5G frequency band according to an embodiment of the present application;

[0023] Figure 4 (b) is a schematic diagram of the gain of the radio frequency antenna provided in the WiFi 2.4G frequency band according to an embodiment of the present application;

[0024] Figure 5 A schematic diagram of the isolation of the radio frequency antenna provided in the embodiment of the present application in the WiFi 5G frequency band and the WiFi 2.4G frequency band;

[0025] Among them, the reference numerals in the figure are:

[0026] 100. radio frequency antenna;

[0027] 10. substrate; 11. first surface; 12. second surface;

[0028] 20, antenna assembly; 21, first radiation branch; 22, second radiation branch; 201, first radiation unit; 2011, first unit; 2012, second unit; 2013, first meandering section; 202, second radiation unit; 2021, third unit; 2022, fourth unit; 2023, second meandering section; 2024, microstrip unit;

[0029] 30. Filter component; 31. First interface; 32. Second interface; 33. First resonant unit; 331. Coupling portion; 332. First bending portion; 333. Second bending portion; 34. Second resonant unit; 341. First branch; 342. Second branch; 35. First connection; 36. Second connection. DETAILED DESCRIPTION

[0030] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0031] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0032] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0034] Combine the following Figure 1 , Figure 2 and Figure 3 The radio frequency antenna 100 provided in an embodiment of the present application is described.

[0035] The radio frequency antenna 100 includes a substrate 10 , an antenna component 20 and a filter component 30 .

[0036] The substrate 10 includes a first surface 11 and a second surface 12 that are disposed opposite to each other. Specifically, the substrate 10 may be an insulating material with a relatively low dielectric constant, and the substrate 10 may be a thin-walled structure such as a flat plate or an arc, the first surface 11 is disposed on one side of the substrate 10 in the thickness direction, the second surface 12 is disposed on the other side of the substrate 10 in the thickness direction, and the first surface 11 and the second surface 12 are parallel to each other.

[0037] The antenna component 20 is disposed on at least one of the first surface 11 and the second surface 12 , and the antenna component 20 is suitable for working in multiple frequency bands.

[0038] Specifically, the frequency band in which the antenna assembly 20 operates generally refers to the frequency range in which it can work normally, and this range is generally determined by the structure, material, and electrical characteristics of the radiator in the antenna assembly 20. Any frequency band in which the antenna assembly 20 operates includes the center frequency in which the antenna assembly 20 operates within the frequency band and the bandwidth range of the frequency band, wherein the center frequency refers to the main operating frequency expected by the antenna assembly 20 when it is designed, and the bandwidth range refers to the performance requirements and characteristics of the antenna assembly 20 within its operating frequency range.

[0039] The antenna component 20 can be arranged on any one of the first surface 11 and the second surface 12 or on the first surface 11 and the second surface 12. The antenna component 20 includes multiple radiators, and the lengths of the multiple radiators are different to absorb electromagnetic waves of different wavelengths, so that the antenna component 20 can operate in multiple frequency bands.

[0040] The filter component 30 is disposed on the first surface 11 , and one end of the filter component 30 is connected to the antenna component 20 . The filter component 30 is provided with a plurality of interfaces, and the resonant frequencies between the interfaces and the antenna component 20 are different, so as to output signals of a plurality of frequency bands through the plurality of interfaces.

[0041] Specifically, the antenna component 20 absorbs electromagnetic waves of multiple frequency bands and converts the electromagnetic waves of multiple frequency bands into oscillating current signals. The multiple electrical signals generated by the electromagnetic waves of multiple frequency bands absorbed by the antenna component 20 are coupled with each other. In order to separate the electrical signals generated by electromagnetic waves of different frequency bands from the multiple mutually coupled electrical signals, it is necessary to separate the multiple mutually coupled electrical signals through the filtering component 30 and output them through different interfaces respectively.

[0042] When multiple mutually coupled electrical signals are transmitted from the antenna component 20 to any interface, for electrical signals with the same resonant frequency as the resonant frequency between the interface and the antenna component 20, the circuit between the antenna component 20 and the interface is equivalent to being open, thereby filtering out electrical signals with the same resonant frequency as the resonant frequency between the interface and the antenna component 20, that is, the interface only outputs electrical signals with different resonant frequencies from the interface to the antenna component 20, thereby realizing a filtering function.

[0043] The resonant frequency between the interface and the antenna assembly 20 is the resonant frequency of the path between the connection point of the antenna assembly 20 and the filter assembly 30 and the interface. The resonant frequencies between multiple interfaces and the antenna assembly 20 are different, so that the multiple interfaces respectively output current signals formed by electromagnetic waves in different frequency bands, thereby achieving operation in different frequency bands through a single antenna assembly 20.

[0044] The filter component 30 and the antenna component 20 are arranged on the same substrate 10. The filter component 30 can be printed on the first surface 11 or the second surface 12 of the substrate 10 while printing the antenna component 20. On the one hand, the processing technology of the antenna component 20 and the filter component 30 is simplified, thereby reducing the processing cost. On the other hand, multiple frequency bands of signals can be directly output through multiple interfaces of the filter component 30, simplifying the connection process between the RF antenna 100 provided in the present application and the PCB.

[0045] Compared with the prior art, the RF antenna 100 provided in the present application has an antenna component 20 and a filter component 30 disposed on the surface of the same substrate 10, which simplifies the structure of the duplexer and the antenna on one hand, and simplifies the processing technology of the duplexer and the antenna on the other hand. The connection between the duplexer and the antenna can be achieved by processing the duplexer and the antenna on the same substrate 10, thereby reducing the processing cost of the duplexer and the antenna.

[0046] In addition, the RF antenna 100 provided in the present application realizes the function of a duplexer through a filtering component 30. On the one hand, the duplexer structure is miniaturized, thereby reducing the size occupied by the duplexer and reducing the influence of the duplexer size on the radiation aperture of the antenna component 20. On the other hand, compared with the solution in which the antenna and the duplexer are independently set in the related technology, the RF antenna 100 provided in the present application can effectively reduce the insertion loss.

[0047] In some embodiments provided in this application, Figure 2 As shown, the filter component 30 includes a first interface 31 and a second interface 32. A first resonance unit 33 is provided between the first interface 31 and the antenna component 20. A second resonance unit 34 is provided between the second interface 32 and the antenna component 20. The resonance frequencies of the first resonance unit 33 and the second resonance unit 34 are different so as to filter out signals of different frequencies respectively.

[0048] Specifically, when the antenna assembly 20 absorbs electromagnetic waves of multiple frequency bands, it generates mutually coupled electrical signals of multiple frequency bands. The mutually coupled electrical signals of multiple frequency bands pass through the first resonance unit 33 during the process of being transmitted from the antenna assembly 20 to the first interface 31 .

[0049] The electrical signals with the same frequency as the resonant frequency of the first resonant unit 33 among the electrical signals of the multiple frequency bands coupled to each other are transmitted to the first resonant unit 33 and lose energy in the first resonant unit 33; the electrical signals with different frequencies from the resonant frequency of the first resonant unit 33 among the electrical signals of the multiple frequency bands coupled to each other do not match the impedance of the first resonant unit 33, so that the electrical signals with different frequencies from the resonant frequency of the first resonant unit 33 among the electrical signals of the multiple frequency bands coupled to each other can be transmitted to the first interface 31.

[0050] Thus, the electromagnetic wave signal having the same resonance frequency as the first resonance unit 33 can be filtered out through the first resonance unit 33, so that the first interface 31 does not output the electromagnetic wave signal having the same resonance frequency as the first resonance unit 33; the electromagnetic wave signal having the same resonance frequency as the second resonance unit 34 can be filtered out through the second resonance unit 34, so that the second interface 32 does not output the electromagnetic wave signal having the same resonance frequency as the second resonance unit 34, thereby improving the isolation between the first interface 31 and the second interface 32.

[0051] In some embodiments provided in this application, Figure 1 and Figure 2 As shown, the filter component 30 includes a first connection 35 connected between the first interface 31 and the antenna component 20, and the first resonance unit 33 is coupled or directly connected to the first connection 35. The filter component 30 also includes a second connection 36 connected between the second interface 32 and the antenna component 20, and the second resonance unit 34 is coupled or directly connected to the second connection 36.

[0052] Specifically, the first wiring 35 is connected between the antenna assembly 20 and the first interface 31, and the second wiring 36 is connected between the antenna assembly 20 and the second interface 32, and the connection between the first wiring 35 and the antenna assembly 20 and the connection between the second wiring 36 and the antenna assembly 20 are the same, so that the first interface 31 and the second interface 32 are connected in parallel, and the first wiring 35 and the second wiring 36 have the same structure to reduce the influence of the first wiring 35 and the second wiring 36 on the electrical signals at the first interface 31 and the second interface 32.

[0053] Part of the first resonant unit 33 is coupled with the first wiring 35 to form a microstrip line structure between the first resonant unit 33 and the first wiring 35. Based on the microstrip line resonance theory, the electrical signal in the first wiring 35 that matches the first resonant unit 33 is transmitted to the first resonant unit 33 through coupling to filter out the electrical signal in the first wiring 35 that matches the first resonant unit 33, so that only part of the electrical signal in the first wiring 35 that does not match the first resonant unit 33 can be transmitted to the first interface 31.

[0054] The second resonance unit 34 is directly connected to the second wiring 36 so that the electrical signal in the second wiring 36 is transmitted to the second resonance unit 34, and the electrical signal in the second wiring 36 that matches the second resonance unit 34 excites resonance in the second resonance unit 34, thereby depleting the energy of the electrical signal in the second wiring 36 that matches the second resonance unit 34, so that only the part of the electrical signal in the second wiring 36 that does not match the second resonance unit 34 can be transmitted to the second interface 32.

[0055] In some embodiments provided in this application, Figure 1As shown, the antenna assembly 20 includes a first radiation branch 21 and a second radiation branch 22 , the resonance frequency of the second resonance unit 34 is within the operating frequency band of the first radiation branch 21 , and the resonance frequency of the first resonance unit 33 is within the operating frequency band of the second radiation branch 22 .

[0056] Specifically, the first radiation branch 21 is Figure 1 The length dimension in the x direction is smaller than that in the second radiation branch 22. Figure 1 The length dimension in the x direction makes the wavelength of the electromagnetic waves mainly absorbed by the first radiation branch 21 smaller than the wavelength of the electromagnetic waves mainly absorbed by the second radiation branch 22, that is, the center frequency of the first radiation branch 21 is greater than the center frequency of the second radiation branch 22, so that the working frequency band of the first radiation branch 21 and the working frequency band of the second radiation branch 22 are different.

[0057] Therefore, the antenna component 20 can absorb electromagnetic waves of two frequency bands and convert the electromagnetic waves of the two frequency bands into electrical signals of two frequencies. The electrical signals of the two frequencies can be separated by the filter component 30 and output through the first interface 31 and the second interface 32 respectively, so that the RF antenna 100 provided in the present application can operate in two frequency bands at the same time.

[0058] In some embodiments, the first radiation branch 21 can operate in a WiFi 5G frequency band, and the second radiation branch 22 can operate in a WiFi 2.4G frequency band.

[0059] In some embodiments provided in the present application, the first radiation branch 21 and the second radiation branch 22 are both dipoles, that is, the first radiation branch 21 is Figure 1 The length dimension in the x direction is 1 / 2 of the wavelength corresponding to the center frequency of the WiFi 5G frequency band. The second radiation branch 22 is Figure 1 The length dimension in the x direction is 1 / 2 of the wavelength corresponding to the center frequency of the WiFi 2.4G frequency band.

[0060] In some embodiments provided in this application, Figure 2 As shown, the second resonance unit 34 includes a plurality of resonance branches, and the resonance frequencies of the plurality of resonance branches are different and are all located within the working frequency band of the first radiation branch 21 .

[0061] Specifically, the plurality of resonant branches include a first branch 341 and a second branch 342. The first branch 341 and the second branch 342 are both directly connected to the second wiring 36. It can be regarded that the first branch 341 and the second branch 342 are connected in series to the second wiring 36. Figure 2 The length dimension in the x direction and the second branch 342 are Figure 2The length dimensions in the x direction are different so that the resonant frequency of the first branch 341 and the resonant frequency of the second branch 342 are different. In the process of transmitting electrical signals of multiple frequencies to the second interface 32 through the second connection 36, the electrical signals of multiple frequencies pass through multiple first branches 341 and second branches 342 at one time. The electrical signal with the same frequency as the resonant frequency of the first branch 341 causes resonance and consumes energy in the first branch 341, and the electrical signal with the same frequency as the resonant frequency of the second branch 342 causes resonance and consumes energy in the second branch 342, so that electrical signals with frequencies different from the resonant frequency of the first branch 341 and the resonant frequency of the second branch 342 can be output from the second interface 32.

[0062] Therefore, by providing the first branch 341 and the second branch 342 , the filtering width of the second resonance unit 34 can be increased, thereby improving the filtering effect of the filtering component 30 , and further making the electrical signal output by the first interface 31 and the electrical signal output by the second interface 32 have a higher isolation.

[0063] In some embodiments, the first branch 341 is Figure 2 The length dimension in the x direction is one quarter wavelength of the 5.6 GHz frequency electromagnetic wave. The second branch 342 is Figure 2 The length dimension in the x direction is one quarter of the wavelength of the 5.3 GHz frequency electromagnetic wave, so that the electrical signals with frequencies near 5.6 GHz can be filtered out through the first branch 341, and the electrical signals with frequencies near 5.3 GHz can be filtered out through the second branch 342, thereby filtering out the electrical signals within the WiFi 5G frequency band and improving the filtering effect of the filtering component 30.

[0064] In some embodiments provided in this application, Figure 1 and Figure 2 As shown, the operating frequency band of the first radiation branch 21 is higher than the operating frequency band of the second radiation branch 22 , the first resonance unit 33 is coupled to the first connection 35 , and the second resonance unit 34 is directly connected to the second connection 36 .

[0065] Specifically, the first radiation branch 21 can work in the WiFi 5G frequency band, the second radiation branch 22 can work in the WiFi 2.4G frequency band, and the first resonance unit 33 is coupled to the first connection 35.

[0066] Thus, the first resonance unit 33 is coupled with the first connection 35 to improve the filtering effect of the first resonance unit 33 on the WiFi2.4G frequency band electrical signal, and the second resonance unit 34 is directly connected to the second connection 36 to improve the filtering effect of the second resonance unit 34 on the WiFi5G frequency band electrical signal.

[0067] In some embodiments provided in this application, Figure 2As shown, the first resonant unit 33 includes a first bending portion 332, a second bending portion 333 and a coupling portion 331 connected between the first bending portion 332 and the second bending portion 333. The coupling portion 331 and the first wiring 35 form a parallel double-line structure so that the electrical signal in the first wiring 35 can be coupled to the first resonant unit 33. Figure 2 The length dimension in the x direction is half of the wavelength corresponding to the center frequency of the WiFi 2.4G frequency band. The first bending portion 332 is bent toward the direction of the second bending portion 333, and the second bending portion 333 is bent toward the direction of the first bending portion 332, so that the first resonance unit 33 constitutes a "U"-shaped resonance structure. The U-shaped resonance structure often has a higher impedance matching characteristic at its resonance frequency, thereby improving the filtering effect of the first resonance unit 33.

[0068] In some embodiments provided in this application, Figure 2 As shown, the length dimension of the first resonance unit 33 along the extension direction of the first wire 35 is 1 / 2 of the wavelength corresponding to the resonance frequency of the first resonance unit 33, and the length dimension of the second resonance unit 34 along the extension direction of the second wire 36 is 1 / 4 of the wavelength corresponding to the resonance frequency of the second resonance unit 34.

[0069] Specifically, the resonance frequency of the first resonance unit 33 is the center frequency of the WiFi 2.4G frequency band, and the resonance frequency of the second resonance unit 34 is the center frequency of the WiFi 5G frequency band.

[0070] The first resonance unit 33 is a half-wavelength resonator, that is, the first resonance unit 33 is Figure 2 The length dimension in the x direction is half of the wavelength of the electromagnetic wave of the center frequency of the WiFi 2.4G frequency band. When the electrical signals of the WiFi 5G frequency band and the WiFi 2.4G frequency band pass through the first connection 35, the electrical signals of the WiFi 2.4G frequency band are concentrated on the first resonance unit 33, causing the first resonance unit 33 to resonate with the energy of the electrical signals of the WiFi 2.4G frequency band, so that the first interface 31 only outputs the electrical signals of the WiFi 5G frequency band.

[0071] The plurality of resonant branches in the second resonant unit 34 and the second connection 36 directly form a microstrip line structure. The first branch 341 in the second resonant unit 34 Figure 2 The length dimension in the x direction is one quarter wavelength of the 5.6 GHz frequency electromagnetic wave. The second branch 342 in the second resonant unit 34 is Figure 2The length dimension in the x direction is one quarter of the wavelength of the 5.3 GHz frequency electromagnetic wave. The multiple resonant branches in the second resonant unit 34 constitute a microstrip line structure with a 1 / 4 wavelength of the WiFi 5G band, which can enable the electrical signal of the WiFi 5G band to generate a 180° reversed electrical signal echo when passing through the second wiring 36, and has the effect of echo suppression or cancellation. Therefore, the second wiring 36 is equivalent to an open circuit for the electrical signal of the WiFi 5G band, and only the electrical signal of the WiFi 2.4G band is output from the second interface 32.

[0072] In some other embodiments of the present application, a 1 / 4 wavelength microstrip line structure of the WiFi 2.4G frequency band is formed between the first resonant unit 33 and the first connecting line 35 .

[0073] In some other embodiments of the present application, the second resonance unit 34 is a half-wavelength resonator of the WiFi 5G frequency band.

[0074] In some embodiments provided in this application, Figure 1 , Figure 2 and Figure 3 As shown, the antenna component 20 includes a first radiation unit 201 and a second radiation unit 202, the first radiation unit 201 is arranged on the first surface 11, the second radiation unit 202 is arranged on the second surface 12, part of the first radiation unit 201 and part of the second radiation unit 202 are coupled and connected, and the filtering component 30 is connected to the first radiation unit 201.

[0075] Specifically, the first radiation unit 201 and the second radiation unit 202 are respectively disposed on the first surface 11 and the second surface 12 of the substrate 10, and a part of the first radiation unit 201 and a part of the second radiation unit 202 form an eccentric double-line structure to couple the first radiation unit 201 and the second radiation unit 202.

[0076] Thus, the first radiation unit 201 and the second radiation unit 202 are respectively arranged on the first surface 11 and the second surface 12 of the substrate 10, which can increase the effective length or width of the antenna component 20, which helps to improve the radiation efficiency of the antenna component 20. On the other hand, the antenna component 20 can be designed to be more compact and the available space can be used more effectively.

[0077] In addition, disposing the first radiation unit 201 and the second radiation unit 202 on the first surface 11 and the second surface 12 of the substrate 10 respectively can simplify the structure of the antenna assembly 20, reduce complexity, and help reduce electromagnetic interference and coupling problems.

[0078] In some embodiments provided in this application, Figure 2 As shown, the first radiation unit 201 includes a first unit 2011 and a second unit 2012. Figure 3As shown, the second radiation unit 202 includes a third unit 2021 and a fourth unit 2022, the first unit 2011 includes a first radiation branch 21 and a second radiation branch 22, the second unit 2012 includes a first radiation branch 21 and a second radiation branch 22, the third unit 2021 includes a first radiation branch 21 and a second radiation branch 22, and the fourth unit 2022 includes a first radiation branch 21 and a second radiation branch 22.

[0079] The first unit 2011 and the third unit 2021 are arranged relative to each other along the y direction in the figure, so that the single first radiating branch 21 in the first unit 2011 and the first radiating branch 21 of the third unit 2021 are symmetrically arranged about the y direction in the figure, and the single second radiating branch 22 in the first unit 2011 and the second radiating branch 22 of the third unit 2021 are symmetrically arranged about the y direction in the figure; the second unit 2012 and the fourth unit 2022 are arranged relative to each other along the y direction in the figure, so that the single first radiating branch 21 in the second unit 2012 and the first radiating branch 21 of the fourth unit 2022 are symmetrically arranged about the y direction in the figure, and the single second radiating branch 22 in the second unit 2012 and the second radiating branch 22 of the fourth unit 2022 are symmetrically arranged about the y direction in the figure.

[0080] Therefore, the first unit 2011 and the third unit 2021 are arranged relatively to each other along the y direction in the figure, and the second unit 2012 and the fourth unit 2022 are arranged relatively to each other along the direction in the figure, so that the beam shape jointly emitted by the first unit 2011 and the third unit 2021 is symmetrical about the y direction in the figure, and the beam shape jointly emitted by the second unit 2012 and the fourth unit 2022 is symmetrical about the y direction in the figure. On the one hand, the radiation efficiency of the RF antenna 100 provided in the present application is improved, and on the other hand, the influence between multiple radiation branches is reduced.

[0081] In some embodiments provided in this application, Figure 2 and Figure 3 As shown, a first meandering section 2013 is provided between the first unit 2011 and the second unit 2012, and a second meandering section 2023 is provided between the third unit 2021 and the fourth unit 2022. The first meandering section 2013 and the second meandering section 2023 are arranged to overlap and correspond along the spacing direction of the first surface 11 and the second surface 12. The first meandering section 2013 enables the first unit 2011 and the second unit 2012 to radiate in phase, thereby reducing the interference between the first unit 2011 and the second unit 2012. The second meandering section 2023 enables the third unit 2021 and the fourth unit 2022 to radiate in phase, thereby reducing the interference between the third unit 2021 and the fourth unit 2022.

[0082] Therefore, if Figure 4As shown in (a) of FIG. 1 , the gain of the RF antenna 100 provided in the present application in the WiFi 5G frequency band is 4.8 dBi. Figure 4 As shown in (b), the gain of the RF antenna 100 provided in the present application in the WiFi 2.4G frequency band is 2.3dBi, so that the RF antenna 100 provided in the present application has high gain characteristics in both the WiFi 5G frequency band and the WiFi 2.4G frequency band.

[0083] In some embodiments provided in this application, Figure 1 and Figure 3 As shown, the second radiation unit 202 further includes a microstrip unit 2024 , and the microstrip unit 2024 and the filter component 30 are stacked along the arrangement direction of the first surface 11 and the second surface 12 .

[0084] At least a portion of the first wiring 35 and the microstrip unit 2024 form a microstrip line structure, and / or at least a portion of the second wiring 36 and the microstrip unit 2024 form a microstrip line structure.

[0085] Specifically, the filter component 30 is disposed on the first surface 11, and the filter component 30 is disposed at one end of the first radiation unit 201 in the x direction in the figure, and the second radiation unit 202 is provided with a microstrip unit 2024 at one end of the x direction in the figure facing the filter component 30, and the microstrip unit 2024 is directly connected to the second radiation unit 202, and the microstrip unit 2024 can be coupled and connected to the filter component 30.

[0086] A microstrip line structure is formed between the microstrip unit 2024 and the first wiring 35, and a microstrip line structure is formed between the microstrip unit 2024 and the second wiring 36. The microstrip line structure has high frequency selectivity, increases the loss of WiFi 2.4G band electrical signals and reduces the loss of WiFi 5G band electrical signals in the first wiring 35, and increases the loss of WiFi 5G band electrical signals and reduces the loss of WiFi 2.4G band electrical signals in the second wiring 36.

[0087] Therefore, if Figure 5 As shown, the RF antenna 100 provided in the present application has a high degree of isolation when outputting WiFi 5G band electrical signals and WiFi 2.4G band electrical signals through the first interface 31 and the second interface 32 respectively. The isolation between the first interface 31 and the second interface 32 in the WiFi 2.4G band is better than 30dB, and the isolation between the first interface 31 and the second interface 32 in the WiFi 5G band is better than 35dB. By setting the microstrip unit 2024, the RF antenna 100 provided in the present application can achieve high gain while also achieving high isolation between the first interface 31 and the second interface 32.

[0088] A communication device provided by the present application is described below.

[0089] The present application proposes a communication device, comprising the radio frequency antenna 100 in any one of the above embodiments.

[0090] Specifically, the communication device provided in the present application also includes a mainboard (not shown in the figure). The RF antenna 100 provided in the present application has the advantages of simple structure and low processing cost compared with the prior art. The filter component 30 and the first interface 31 and the second interface 32 can be directly processed on the surface of the substrate 10 by printing. When the RF antenna 100 provided in the present application is connected to the mainboard, it is only necessary to connect the first interface 31 and the second interface 32 to the dual-frequency connector on the mainboard respectively.

[0091] Therefore, the RF antenna 100 provided in the present application realizes the function of a duplexer through the filtering component 30, without adding an additional duplexer on the hardware board. On the one hand, it simplifies the structure of the communication device provided by the present application and simplifies the manufacturing process of the communication device provided by the present application, and on the other hand, it reduces the insertion loss of the antenna connecting the duplexer.

[0092] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A radio frequency antenna, characterized in that: include: A substrate, the substrate comprising a first surface and a second surface disposed opposite to each other; an antenna assembly, the antenna assembly being disposed on at least one of the first surface and the second surface, the antenna assembly being adapted to operate in a plurality of frequency bands; A filter component, wherein the filter component is disposed on the first surface, one end of the filter component is connected to the antenna component, and the filter component is provided with a plurality of interfaces, wherein the resonant frequencies between the interfaces and the antenna component are different, so as to output signals of a plurality of frequency bands through the plurality of interfaces.

2. The radio frequency antenna according to claim 1, characterized in that: The filtering component includes a first interface and a second interface. A first resonance unit is provided between the first interface and the antenna component, and a second resonance unit is provided between the second interface and the antenna component. The resonance frequencies of the first resonance unit and the second resonance unit are different so as to filter out signals of different frequencies respectively.

3. The radio frequency antenna according to claim 2, characterized in that: The filtering component includes a first connection connected between the first interface and the antenna component, and the first resonance unit is coupled or directly connected to the first connection. The filtering component also includes a second connection connected between the second interface and the antenna component, and the second resonance unit is coupled or directly connected to the second connection.

4. The radio frequency antenna according to claim 3, characterized in that: The antenna assembly includes a first radiation branch and a second radiation branch, the resonance frequency of the second resonance unit is located within the working frequency band of the first radiation branch, and the resonance frequency of the first resonance unit is located within the working frequency band of the second radiation branch.

5. The radio frequency antenna according to claim 4, characterized in that: The second resonance unit includes a plurality of resonance branches, and the resonance frequencies of the plurality of resonance branches are different and are all located within the working frequency band of the first radiation branch.

6. The radio frequency antenna according to claim 4, characterized in that: The operating frequency band of the first radiation branch is higher than the operating frequency band of the second radiation branch. The first resonance unit is coupled to the first wiring, and the second resonance unit is directly connected to the second wiring.

7. The radio frequency antenna according to claim 6, characterized in that: The length of the first resonance unit along the extending direction of the first wire is 1 / 2 of the wavelength corresponding to the resonance frequency of the first resonance unit, and the length of the second resonance unit along the extending direction of the second wire is 1 / 4 of the wavelength corresponding to the resonance frequency of the second resonance unit.

8. The radio frequency antenna according to any one of claims 3 to 7, characterized in that: The antenna component includes a first radiation unit and a second radiation unit, the first radiation unit is arranged on the first surface, the second radiation unit is arranged on the second surface, part of the first radiation unit and part of the second radiation unit are coupled and connected, and the filtering component is connected to the first radiation unit.

9. The radio frequency antenna according to claim 8, characterized in that: The second radiation unit further includes a microstrip unit, and the microstrip unit and the filter component are stacked along the arrangement direction of the first surface and the second surface; At least part of the first wiring and the microstrip unit form a microstrip line structure, and / or at least part of the second wiring and the microstrip unit form a microstrip line structure.

10. A communication device, characterized in that: The invention comprises the radio frequency antenna according to any one of claims 1 to 9.

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