Coupling device and communication equipment

Abstract

The utility model provides a coupling device and communication equipment, the coupling device comprises a coupling element and a wavelength element, the coupling element comprises a first coupling section and a second coupling section which are arranged in a mutually separated mode, and the first coupling section and the second coupling section are both used for being coupled with a signal transmission element electrically connected between a filter and an antenna. The wavelength element is electrically connected between the first coupling section and the second coupling section. According to the coupling device provided by the invention, the coupling element is divided into the first coupling section and the second coupling section which are separated from each other, the first coupling section and the second coupling section can be used for coupling signals to different degrees, and the first coupling section and the second coupling section are electrically connected by adopting the wavelength element; the coupling signal of the first coupling section and the coupling signal of the second coupling section can be superposed, so that a relatively uniform coupling effect is achieved in a wider frequency range, and the flatness of the coupling device is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of communication, in particular to a coupling device and a communication device. BACKGROUND

[0002] The communication device usually comprises a filter, an antenna and a coupling device, the filter and the antenna are electrically connected through a signal transmission element, and the coupling device is coupled with the signal transmission element to detect power, so as to reduce the risk of damage to the communication device caused by high power. However, in the related art, the flatness of the coupling device is low, which leads to a decrease in detection accuracy. CONTENT OF THE UTILITY MODEL

[0003] One of the purposes of the embodiments of the present application is to provide a coupling device and a communication device, aiming at solving the technical problem of low flatness of the coupling device in the related art.

[0004] To solve the above technical problem, the technical solution adopted by the embodiments of the present application is to provide a coupling device, comprising:

[0005] A coupling element, comprising a first coupling segment and a second coupling segment arranged separately from each other, and the first coupling segment and the second coupling segment are both used for coupling with a signal transmission element electrically connected between a filter and an antenna;

[0006] A wavelength element electrically connected between the first coupling segment and the second coupling segment.

[0007] The coupling device provided by the embodiments of the present application has the beneficial effects that: the coupling device provided by the embodiments of the present application divides the coupling element into the first coupling segment and the second coupling segment arranged separately from each other, the first coupling segment and the second coupling segment can respectively couple signals to different degrees, and the wavelength element is used to electrically connect the first coupling segment and the second coupling segment, so that the coupling signals of the first coupling segment and the coupling signals of the second coupling segment can be superimposed, at different frequencies, the coupling signals of the first coupling segment and the coupling signals of the second coupling segment can complement or adjust each other when superimposed, so as to achieve a more uniform coupling effect in a wider frequency range, thereby effectively improving the flatness of the coupling device.

[0008] In some embodiments of the present application, the coupling device further comprises a circuit board, and the coupling element and the wavelength element are both arranged on the circuit board.

[0009] In some embodiments of the present application, the circuit board has a first board surface and a second board surface arranged oppositely, the first coupling segment comprises a first coupling body arranged on the first board surface and a second coupling body arranged on the second board surface, the first coupling body is electrically connected with the second coupling body, the second coupling segment comprises a third coupling body arranged on the first board surface and a fourth coupling body arranged on the second board surface, and the third coupling body is electrically connected with the fourth coupling body.

[0010] In some embodiments of the present application, the wavelength element is arranged on the first plate surface and is electrically connected between the first coupling body and the third coupling body; or, the wavelength element is arranged on the second plate surface and is electrically connected between the second coupling body and the fourth coupling body.

[0011] In some embodiments of the present application, the circuit board is provided with a first via hole penetrating through the first plate surface and the second plate surface, and the first coupling body and the second coupling body are electrically connected through the first via hole; and / or, the circuit board is provided with a second via hole penetrating through the first plate surface and the second plate surface, and the third coupling body and the fourth coupling body are electrically connected through the second via hole.

[0012] In some embodiments of the present application, the sum of the lengths of the first coupling segment, the second coupling segment and the wavelength element is λ / 4, wherein λ is the wavelength corresponding to the center frequency of the filter.

[0013] In some embodiments of the present application, the output impedance of the coupling device is 50Ω.

[0014] In some embodiments of the present application, the first coupling segment and the second coupling segment are arranged on the same side of the signal transmission element and are arranged separately along the signal transmission direction of the signal transmission element.

[0015] In some embodiments of the present application, the coupling element further comprises a coupling output segment and an isolation segment, the coupling output segment is electrically connected with the first coupling segment, and the isolation segment is electrically connected with the second coupling segment.

[0016] The embodiments of the present application also provide a communication device, which comprises a filter, an antenna, a signal transmission element and the coupling device of any one of the above-mentioned embodiments, the signal transmission element is electrically connected between the filter and the antenna, and the first coupling segment and the second coupling segment are both coupled with the signal transmission element.

[0017] The communication device provided by the embodiments of the present application has the beneficial effects that, since the communication device provided by the embodiments of the present application adopts the coupling device of any one of the above-mentioned embodiments, the performance of the communication device is effectively improved.

[0018] In some embodiments of the present application, the first coupling segment and the second coupling segment are both arranged in parallel with the signal transmission element. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or exemplary technical descriptions will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0020] Figure 1 A structural schematic diagram of a communication device provided by an embodiment of the present application is shown in the figure;

[0021] Figure 2 A structural schematic diagram of a communication device provided by an embodiment of the present application is shown in the figure; Figure 1 An exploded structural schematic diagram of a communication device is shown in the figure;

[0022] Figure 3 A structural schematic diagram of a communication device provided by an embodiment of the present application is shown in the figure; Figure 2 A first perspective structural schematic diagram of a coupling device in a communication device is shown in the figure, with the shell removed;

[0023] Figure 4 A second perspective structural schematic diagram of a coupling device in a communication device is shown in the figure, with the shell removed; Figure 2 A second perspective structural schematic diagram of a coupling device in a communication device is shown in the figure, with the shell removed;

[0024] Figure 5 A structural schematic diagram of a circuit board of a coupling device in a communication device is shown in the figure; Figure 2 A structural schematic diagram of a circuit board of a coupling device in a communication device is shown in the figure;

[0025] Figure 6 A simulation diagram of a coupling device in the prior art is shown in the figure;

[0026] Figure 7 A simulation diagram of a coupling device provided by an embodiment of the present application is shown in the figure.

[0027] Explanation of reference numerals:

[0028] 100, a communication device;

[0029] 10, a coupling device; 11, a coupling element; 111, a first coupling section; 1111, a first coupling body; 1112, a second coupling body; 112, a second coupling section; 1121, a third coupling body; 1122, a fourth coupling body; 113, a coupling output section; 114, an isolation section; 12, a wavelength element; 13, a circuit board; 131, a first board surface; 132, a second board surface; 133, a first via hole; 134, a second via hole; 14, a shell;

[0030] 20, a signal transmission element;

[0031] 30, a filter;

[0032] 40, an antenna. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the present application more clear, the present application is further described in detail below in combination with the figures 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.

[0034] It should be noted that when a component is referred to as being "fixed" or "set" on another component, it can be directly on the other component or indirectly on the other component. When a component is referred to as being "connected" to another component, it can be directly or indirectly connected to the other component. The terms "upper", "lower", "left", "right", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. For those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances. The terms "first", "second", "third", "fourth" are only for the convenience of description, and cannot be understood as indicating or implying relative importance or implying the number of technical features. The meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0035] In the embodiments of the present application, the same reference signs represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings are only exemplary and should not constitute any limitation on the present application.

[0036] In a communication device, a coupling device is usually used for power detection. Specifically, a filter and an antenna in the communication device are electrically connected through a signal transmission element, and a coupling element in the coupling device is coupled with the signal transmission element to detect the power of the communication device. When the communication device is abnormal, the power value detected by the coupling device will change. At this time, the coupling device judges that the communication device is abnormal and sends a signal to the control unit of the communication device to shut down the communication device, thereby protecting the communication device and reducing the risk of damage to the communication device caused by high power.

[0037] In the related art, the coupling element is usually designed in one piece, so that the coupling of the coupling element to the signal is completed at one time. At different frequencies, especially when the filter is applied to a wider frequency range, since the superposition mode of the coupled signal is relatively fixed, the coupling degree of the coupling device produces a large fluctuation, resulting in a decrease in the flatness of the coupling device, thereby causing the power value detected by the coupling device to be distorted.

[0038] In order to improve the flatness of the coupling device, the coupling device provided by the embodiment of the present application divides the coupling element into the first coupling section and the second coupling section which are arranged separately, the first coupling section and the second coupling section can respectively couple signals with different degrees, and the wavelength element is used to electrically connect the first coupling section and the second coupling section, so that the coupling signals of the first coupling section and the coupling signals of the second coupling section can be superimposed, at different frequencies, the coupling signals of the first coupling section and the coupling signals of the second coupling section can complement or adjust each other when superimposed, so as to achieve a more uniform coupling effect in a wider frequency range, thereby effectively improving the flatness of the coupling device.

[0039] The coupling device provided by the embodiment of the present application will be described below in combination with the drawings.

[0040] In the first aspect, please refer to Figures 1 to 3 The embodiment of the present application provides a coupling device 10, which comprises a coupling element 11 and a wavelength element 12. The coupling element 11 comprises a first coupling section 111 and a second coupling section 112 which are arranged separately, and the first coupling section 111 and the second coupling section 112 are both used for coupling with a signal transmission element 20 which is electrically connected between a filter 30 and an antenna 40. The wavelength element 12 is electrically connected between the first coupling section 111 and the second coupling section 112.

[0041] The coupling element 11 is a component for coupling with the signal transmission element 20, wherein the first coupling section 111 and the second coupling section 112 are two core components of the coupling element 11, and the first coupling section 111 and the second coupling section 112 are both used for coupling with the signal transmission element 20. The first coupling section 111 and the second coupling section 112 are arranged separately, which means that the first coupling section 111 and the second coupling section 112 do not directly contact each other, so that the first coupling section 111 and the second coupling section 112 can respectively and independently couple with the signal transmission element 20.

[0042] In some embodiments, the first coupling section 111 and the second coupling section 112 are both coupling microstrips.

[0043] Of course, in other embodiments, the first coupling section 111 and the second coupling section 112 can also be coupling loops, coupling lines, etc., which are not limited here.

[0044] The wavelength element 12 is a transmission element with a length in a specific proportion to the wavelength of the transmitted signal. One end of the wavelength element 12 is connected to the first coupling section 111, and the other end of the wavelength element 12 is connected to the second coupling section 112. The wavelength element 12 can adjust the phase and amplitude of the coupled signal, so as to improve the performance of the coupling device 10. In some embodiments, the wavelength element 12 has a bending structure, so as to set the length of the wavelength element 12 in a limited space. The bending structure can be, but is not limited to, a U-shaped structure, an S-shaped structure, a wave structure, etc.

[0045] In some embodiments, the coupling device 10 further includes a housing 14, which is used to provide an internal environment of the coupling device 10, and the internal environment is used to accommodate the coupling element 11 and the wavelength element 12. For example, the housing 14 can be made of a signal shielding material, and the housing 14 is provided with a coupling opening, through which the first coupling section 111 and the second coupling section 112 are coupled to the signal transmission element 20, so as to reduce the interference of external signals on the coupling element 11.

[0046] The coupling device 10 provided by the embodiments of the present application divides the coupling element 11 into the first coupling section 111 and the second coupling section 112 arranged separately from each other. The first coupling section 111 and the second coupling section 112 can respectively couple the signal to different degrees, and the wavelength element 12 is used to electrically connect the first coupling section 111 and the second coupling section 112, so that the coupled signals of the first coupling section 111 and the second coupling section 112 can be superimposed. At different frequencies, the coupled signals of the first coupling section 111 and the second coupling section 112 can complement or adjust each other when superimposed, so as to achieve a more uniform coupling effect in a wider frequency range, thereby effectively improving the flatness of the coupling device 10.

[0047] In some embodiments of the present application, referring to Figure 2 and Figure 3 , the coupling device 10 further includes a circuit board 13, and the coupling element 11 and the wavelength element 12 are arranged on the circuit board 13.

[0048] The circuit board 13 is used to provide electrical connection and physical support for the coupling element 11 and the wavelength element 12. In some embodiments, the circuit board 13 can include a dielectric layer, and the coupling element 11 and the wavelength element 12 are arranged on the dielectric layer. The material of the dielectric layer can be glass cloth-based epoxy resin (FR4). Of course, in other embodiments, the material of the intermediate layered structure can also be paper-based phenolic resin, polyimide, etc., which is not limited here.

[0049] By adopting the technical scheme, integration design of the coupling device 10 is facilitated, the volume of the coupling device 10 is effectively reduced, and miniaturization of the coupling device 10 is effectively realized.

[0050] In some embodiments of the present application, referring to Figure 3 and Figure 4 , the circuit board 13 has a first board surface 131 and a second board surface 132 arranged oppositely, the first coupling section 111 includes a first coupling body 1111 arranged on the first board surface 131 and a second coupling body 1112 arranged on the second board surface 132, the first coupling body 1111 is electrically connected with the second coupling body 1112, and the second coupling section 112 includes a third coupling body 1121 arranged on the first board surface 131 and a fourth coupling body 1122 arranged on the second board surface 132, the third coupling body 1121 is electrically connected with the fourth coupling body 1122.

[0051] In some embodiments, the second board surface 132 is arranged oppositely to the signal transmission element 20, the wavelength element 12 is arranged on the first board surface 131 and electrically connected between the first coupling body 1111 and the third coupling body 1121, the second coupling body 1112 and the fourth coupling body 1122 are respectively coupled with the signal transmission element 20, the coupling signal generated by the second coupling body 1112 is transmitted to the first coupling body 1111, the coupling signal generated by the fourth coupling body 1122 is transmitted to the third coupling body 1121, and the coupling signal of the first coupling section 111 and the coupling signal of the second coupling section 112 are superimposed through the wavelength element 12.

[0052] In some other embodiments, the first board surface 131 is arranged oppositely to the signal transmission element 20, the wavelength element 12 is arranged on the second board surface 132 and electrically connected between the second coupling body 1112 and the fourth coupling body 1122, the first coupling body 1111 and the third coupling body 1121 are respectively coupled with the signal transmission element 20, the coupling signal generated by the first coupling body 1111 is transmitted to the second coupling body 1112, the coupling signal generated by the third coupling body 1121 is transmitted to the fourth coupling body 1122, and the coupling signal of the first coupling section 111 and the coupling signal of the second coupling section 112 are superimposed through the wavelength element 12.

[0053] In some other embodiments, the first board surface 131 is arranged oppositely to the signal transmission element 20, the wavelength element 12 is arranged on the first board surface 131 and electrically connected between the first coupling body 1111 and the third coupling body 1121, the first coupling body 1111 and the third coupling body 1121 are respectively coupled with the signal transmission element 20, and the coupling signal generated by the first coupling body 1111 and the coupling signal generated by the third coupling body 1121 are superimposed through the wavelength element 12.

[0054] In still other embodiments, the second plate surface 132 is opposite to the signal transmission element 20, the wavelength element 12 is arranged on the second plate surface 132 and is electrically connected between the second coupling body 1112 and the fourth coupling body 1122, the second coupling body 1112 and the fourth coupling body 1122 are respectively coupled with the signal transmission element 20, and the coupling signals generated by the second coupling body 1112 and the fourth coupling body 1122 are superimposed through the wavelength element 12.

[0055] By adopting the above technical solutions, the signal transmission element 20 can be coupled with the coupling element 11 on the first plate surface 131 or on the second plate surface 132, so that the coupling device 10 is facilitated to be assembled, and the assembly flexibility of the coupling device 10 is effectively improved.

[0056] In some embodiments of the present application, please refer to Figures 3 to 5 The circuit board 13 is provided with the first via hole 133 penetrating through the first plate surface 131 and the second plate surface 132, and the first coupling body 1111 and the second coupling body 1112 are electrically connected through the first via hole 133.

[0057] In some embodiments, the first via hole 133 can be filled with a conductive medium, and the first coupling body 1111 and the second coupling body 1112 are electrically connected through the conductive medium. The conductive medium can be, but is not limited to, copper, conductive glue and the like.

[0058] In other embodiments, the hole inner wall of the first via hole 133 can be covered with a conductive layer, and the first coupling body 1111 and the second coupling body 1112 are electrically connected through the conductive layer. The conductive layer can be, but is not limited to, a copper layer, a silver layer and the like.

[0059] In some embodiments, the number of the first via holes 133 is multiple, and the multiple first via holes 133 are arranged in an array structure between the first coupling body 1111 and the second coupling body 1112, so as to improve the stability of the electrical connection between the first coupling body 1111 and the second coupling body 1112.

[0060] By adopting the above technical solutions, the first coupling body 1111 and the second coupling body 1112 are facilitated to be electrically connected, and the structure of the coupling device 10 is effectively simplified.

[0061] In other embodiments of the present application, please refer to Figures 3 to 5 The circuit board 13 is provided with the second via hole 134 penetrating through the first plate surface 131 and the second plate surface 132, and the third coupling body 1121 and the fourth coupling body 1122 are electrically connected through the second via hole 134.

[0062] In some embodiments, the second via hole 134 can be filled with a conductive medium, and the third coupling body 1121 and the fourth coupling body 1122 are electrically connected through the conductive medium. The conductive medium can be, but is not limited to, copper, conductive glue, etc.

[0063] In other embodiments, the inner wall of the hole of the second via hole 134 can be covered with a conductive layer, and the first coupling body 1111 and the second coupling body 1112 are electrically connected through the conductive layer. The conductive layer can be, but is not limited to, a copper layer, a silver layer, etc.

[0064] In some embodiments, the number of the second via hole 134 is multiple, and the multiple second via holes 134 are arranged in an array structure between the third coupling body 1121 and the fourth coupling body 1122, so as to improve the stability of the electrical connection between the third coupling body 1121 and the fourth coupling body 1122.

[0065] By adopting the above technical solution, the third coupling body 1121 and the fourth coupling body 1122 are electrically connected, and the structure of the coupling device 10 is effectively simplified.

[0066] In some embodiments of the present application, please refer to Figures 3 to 5 The circuit board 13 is provided with the first via hole 133 and the second via hole 134 penetrating through the first board surface 131 and the second board surface 132, the first coupling body 1111 and the second coupling body 1112 are electrically connected through the first via hole 133, and the third coupling body 1121 and the fourth coupling body 1122 are electrically connected through the second via hole 134.

[0067] By adopting the above technical solution, the first coupling body 1111 and the second coupling body 1112 are electrically connected, and the third coupling body 1121 and the fourth coupling body 1122 are electrically connected, and the structure of the coupling device 10 is effectively simplified.

[0068] In some embodiments of the present application, the sum of the lengths of the first coupling section 111, the second coupling section 112 and the wavelength element 12 is λ / 4, wherein λ is the wavelength corresponding to the center frequency of the filter 30.

[0069] The wavelength corresponding to the center frequency of the filter 30 changes according to the different frequency ranges in which the filter 30 works, and accordingly, the sum of the lengths of the first coupling section 111, the second coupling section 112 and the wavelength element 12 also changes.

[0070] As an example, the center frequency of the filter 30 is 800MHz, and through simulation calculation, it can be obtained that the wavelength λ of the filter 30 is 207.5mm, that is, the sum of the lengths of the first coupling section 111, the second coupling section 112 and the wavelength element 12 is 51.88mm.

[0071] By adopting the technical scheme, the coupling device 10 and other components (such as the signal transmission element 20, the filter 30, the antenna 40, a control unit, etc.) in the communication device 100 can achieve better impedance matching in a wider frequency range, reduce signal reflection, and make power transmission more stable, thereby further improving the flatness of the coupling device 10.

[0072] In some embodiments of the present application, the output impedance of the coupling device 10 is 50Ω.

[0073] The output impedance of the coupling device 10 can be set to 50Ω by adjusting one or more of the width and thickness of the coupling element 11, the width and thickness of the wavelength element 12, the width and thickness of the isolation section 114, and the width and thickness of the coupling output section 113.

[0074] By adopting the technical scheme, the coupling device 10 and other components (such as the signal transmission element 20, the filter 30, the antenna 40, a control unit, etc.) in the communication device 100 can achieve better impedance matching in a wider frequency range, reduce signal reflection, and make power transmission more stable, thereby further improving the flatness of the coupling device 10.

[0075] In some embodiments of the present application, the first coupling section 111 and the second coupling section 112 are arranged on the same side of the signal transmission element 20 and are separated along the signal transmission direction of the signal transmission element 20.

[0076] In some embodiments, the first coupling section 111 and the second coupling section 112 are both arranged on the upper side of the signal transmission element 20 along the thickness direction of the circuit board 13.

[0077] In some other embodiments, the first coupling section 111 and the second coupling section 112 are both arranged on the lower side of the signal transmission element 20 along the thickness direction of the circuit board 13.

[0078] The first coupling section 111 and the second coupling section 112 are arranged separately along the signal transmission direction of the signal transmission element 20, which means that there is a certain gap between the first coupling section 111 and the second coupling section 112 in the direction from the filter 30 to the antenna 40.

[0079] By adopting the technical scheme, the consistency of the coupling degree of the first coupling section 111 and the coupling degree of the second coupling section 112 can be improved, thereby further improving the flatness of the coupling device 10.

[0080] In some embodiments of the present application, please refer to Figure 3The coupling element 11 further comprises a coupling output section 113 and an isolation section 114, the coupling output section 113 being electrically connected with the first coupling section 111, and the isolation section 114 being electrically connected with the second coupling section 112.

[0081] The isolation section 114 is used to realize the isolation between the coupling signal input port and the coupling signal output port of the coupling device 10. When the coupling device 10 is working, the isolation section 114 can prevent the coupling signal from directly leaking from the coupling signal input port to the coupling signal output port, ensuring that only the signal coupled out by the coupling element 11 is output from the coupling signal output port, instead of the coupling signal directly coupling to the coupling signal output port without being coupled, thereby improving the isolation index of the coupling device 10 and ensuring the normal working of the coupling device 10 and the accurate detection and processing of the signal.

[0082] The coupling output section 113 is used to effectively output the signal coupled out from the signal transmission element 20 by the coupling element 11, providing an input signal for subsequent signal processing. The coupling output section 113 transmits the signal coupled with the power of the signal transmission element 20 in a certain proportional relationship to the corresponding detection or processing circuit, so as to measure, analyze and control the power and other parameters of the signal.

[0083] By adopting the above technical solution, the coupling device 10 can output the coupling signal.

[0084] Please refer to Figure 6 , Figure 6 The simulation diagram of the coupling device 10 in the prior art is shown in Figure 6 , the working frequency band of the filter 30 is 617MHz-960MHz, and the worst two edge frequency point indexes are 700MHz (coupling degree =-30.4dB) and 960MHz (coupling degree =-26.7dB), so that the coupling fluctuation of the coupling device 10 is 3.7dB.

[0085] Please refer to Figure 7 , Figure 7 The simulation diagram of the coupling device 10 provided by the embodiment of the present application is shown in Figure 7 , the working frequency band of the filter 30 is 617MHz-960MHz, and the worst two edge frequency point indexes are 700MHz (coupling degree =-30.8dB) and 960MHz (coupling degree =-28.8dB), so that the coupling fluctuation of the coupling device 10 is 2dB.

[0086] By comparison, it is found that the coupling fluctuation of the coupling device 10 in the prior art is 1.85 times of the coupling fluctuation of the coupling device 10 provided by the embodiment of the present application, so that the flatness of the coupling device 10 provided by the embodiment of the present application is much better than the flatness of the coupling device 10 in the prior art.

[0087] In a second aspect, referring to Figure 1 and Figure 2 , the embodiment of the present application provides a communication device 100, comprising a filter 30, an antenna 40, a signal transmission element 20 and the coupling device 10 described in any one of the above embodiments, the signal transmission element 20 is electrically connected between the filter 30 and the antenna 40, and the first coupling section 111 and the second coupling section 112 are both coupled with the signal transmission element 20.

[0088] The filter 30 is a circuit or device for selecting signal frequency, and the filter 30 realizes the frequency screening and processing of the signal by allowing the signal in a specific frequency range to pass while blocking or attenuating the signal of other frequencies. The filter 30 can be, but is not limited to, an LC filter, a crystal filter, a ceramic filter, a surface acoustic wave filter, etc.

[0089] The antenna 40 is a device for converting electrical signals and electromagnetic waves, at the sending end, the antenna 40 converts the electrical signal in the form of high-frequency current or guided wave into electromagnetic waves and radiates them into space; at the receiving end, the antenna 40 converts the electromagnetic waves in space into electrical signals and transmits them to the receiving device. The antenna 40 can be, but is not limited to, a dipole antenna, a parabolic antenna, a microstrip antenna, etc.

[0090] The signal transmission element 20 is a line or medium for transmitting electrical signals between the filter 30 and the antenna 40, and the signal transmission element 20 can guide the transmission of signals to ensure the integrity and accuracy of the signals during transmission. The signal transmission element 20 can be, but is not limited to, a coaxial line, a twisted pair, a transmission main rod, etc.

[0091] The communication device 100 provided by the embodiment of the present application effectively improves the performance of the communication device 100 due to the use of the coupling device 10 described in any one of the above embodiments.

[0092] In some embodiments of the present application, referring to Figure 2 , the first coupling section 111 and the second coupling section 112 are both arranged in parallel with the signal transmission element 20.

[0093] It can be understood that in the embodiment, the first coupling section 111 and the second coupling section 112 can be coupling microstrips or coupling lines, and the signal transmission element 20 can be a signal transmission line such as a coaxial line, the length direction of the first coupling section 111, the length direction of the second coupling section 112 and the length direction of the signal transmission element 20 are parallel to each other.

[0094] In some embodiments, the distance between the first coupling section 111 and the signal transmission element 20 and the distance between the second coupling section 112 and the signal transmission element 20 are equal, which can improve the consistency of the coupling degree of the first coupling section 111 and the coupling degree of the second coupling section 112, thereby further improving the flatness of the coupling device 10.

[0095] By adopting the above technical solutions, the consistency of the coupling degree of the first coupling section 111 and the coupling degree of the second coupling section 112 can be improved, thereby further improving the flatness of the coupling device 10.

[0096] The above is only optional embodiments of the present application and is not intended to limit the present application. Various modifications and changes can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the scope of the claims of the present application.

Claims

1. A coupling device, characterized in that The coupling device comprises: a coupling element comprising a first coupling segment and a second coupling segment arranged apart from each other, the first coupling segment and the second coupling segment are both used for coupling with a signal transmission element electrically connected between a filter and an antenna; a wavelength element electrically connected between the first coupling segment and the second coupling segment.

2. The coupling device of claim 1, wherein, The coupling device further comprises a circuit board, the coupling element and the wavelength element are both arranged on the circuit board.

3. The coupling device of claim 2, wherein, The circuit board has a first board surface and a second board surface arranged opposite to each other, the first coupling segment comprises a first coupling body arranged on the first board surface and a second coupling body arranged on the second board surface, the first coupling body and the second coupling body are electrically connected, the second coupling segment comprises a third coupling body arranged on the first board surface and a fourth coupling body arranged on the second board surface, the third coupling body and the fourth coupling body are electrically connected.

4. The coupling device according to claim 3, wherein: the wavelength element is arranged on the first board surface and electrically connected between the first coupling body and the third coupling body; or the wavelength element is arranged on the second board surface and electrically connected between the second coupling body and the fourth coupling body.

5. The coupling device according to claim 3, wherein: the circuit board is provided with a first via hole penetrating through the first board surface and the second board surface, the first coupling body and the second coupling body are electrically connected through the first via hole; and / or the circuit board is provided with a second via hole penetrating through the first board surface and the second board surface, the third coupling body and the fourth coupling body are electrically connected through the second via hole.

6. The coupling device of any one of claims 1-5, wherein, The sum of the lengths of the first coupling segment, the second coupling segment and the wavelength element is λ / 4, wherein λ is a wavelength corresponding to a center frequency of the filter.

7. The coupling device of any one of claims 1-5, wherein, The output impedance of the coupling device is 50Ω.

8. The coupling device of any one of claims 1-5, wherein, The first coupling segment and the second coupling segment are arranged on the same side of the signal transmission element and are arranged apart from each other along a signal transmission direction of the signal transmission element.

9. The coupling device of any one of claims 1-5, wherein, The coupling element further comprises a coupling output segment and an isolation segment, the coupling output segment is electrically connected with the first coupling segment, and the isolation segment is electrically connected with the second coupling segment.

10. A communication device, characterized by The communication device comprises a filter, an antenna, a signal transmission element and the coupling device according to any one of claims 1-9, the signal transmission element is electrically connected between the filter and the antenna, and the first coupling segment and the second coupling segment are both coupled with the signal transmission element.

11. The communication device of claim 10, wherein, The first coupling segment and the second coupling segment are both arranged parallel to the signal transmission element.

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