Coupling device and communication equipment

Abstract

The invention 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 field of communication technology, and in particular to a coupling device and communication equipment. Background Art

[0002] Communication equipment generally includes 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 to the signal transmission element to detect power, thereby reducing the risk of damage to the communication equipment caused by high power. However, in the related art, the flatness of the coupling device is low, resulting in a decrease in detection accuracy. Summary of the invention

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

[0004] In order to solve the above technical problems, the technical solution adopted in the embodiment of the present application is: a coupling device is provided, comprising:

[0005] A coupling element, comprising a first coupling section and a second coupling section which are separated from each other, wherein the first coupling section and the second coupling section are both used to couple with a signal transmission element which is electrically connected between the filter and the antenna;

[0006] The wavelength element is electrically connected between the first coupling section and the second coupling section.

[0007] The beneficial effect of the coupling device provided by the embodiment of the present application is that: the coupling device provided by the embodiment of the present application divides the coupling element into a first coupling section and a second coupling section that are separated from each other, and the first coupling section and the second coupling section can respectively couple the signal to different degrees, and the first coupling section and the second coupling section are electrically connected by a wavelength element, so that the coupling signal of the first coupling section and the coupling signal of the second coupling section can be superimposed, and at different frequencies, the coupling signal of the first coupling section and the coupling signal 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.

[0008] In some embodiments of the present application, the coupling device further includes 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 back to back, the first coupling section includes 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 to the second coupling body, and the second coupling section includes 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 to the fourth coupling body.

[0010] In some embodiments of the present application, the wavelength element is disposed on the first board surface and electrically connected between the first coupling body and the third coupling body; or, the wavelength element is disposed on the second board surface and 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 the first board surface and the second board surface, and the first coupling body is electrically connected to the second coupling body through the first via hole; and / or, the circuit board is provided with a second via hole penetrating the first board surface and the second board surface, and the third coupling body is electrically connected to the fourth coupling body through the second via hole.

[0012] In some embodiments of the present application, the sum of the lengths of the first coupling section, the second coupling section, and the wavelength element is λ / 4, where 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 section and the second coupling section are disposed on the same side of the signal transmission element and are separated from each other along the signal transmission direction of the signal transmission element.

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

[0016] An embodiment of the present application also provides a communication device, including a filter, an antenna, a signal transmission element and the coupling device described in any of the above embodiments, the signal transmission element is electrically connected between the filter and the antenna, and the first coupling section and the second coupling section are both coupled to the signal transmission element.

[0017] The beneficial effect of the communication device provided by the embodiment of the present application is that the communication device provided by the embodiment of the present application effectively improves the performance of the communication device due to the use of the coupling device described in any of the above embodiments.

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

[0019] 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 exemplary technical descriptions 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 work.

[0020] Figure 1 A schematic diagram of the structure of a communication device provided in an embodiment of the present application;

[0021] Figure 2 for Figure 1 The exploded structural diagram of the communication equipment shown;

[0022] Figure 3 for Figure 2 The schematic diagram of the structure of the coupling device in the communication device shown is a first-view structural diagram after the housing is removed;

[0023] Figure 4 for Figure 2 The schematic diagram of the structure of the coupling device in the communication device shown in the second viewing angle after the housing is removed;

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

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

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

[0027] Description of reference numerals:

[0028] 100. Communication equipment;

[0029] 10. Coupling device; 11. Coupling element; 111. First coupling section; 1111. First coupling body; 1112. Second coupling body; 112. Second coupling section; 1121. Third coupling body; 1122. Fourth coupling body; 113. Coupling output section; 114. Isolation section; 12. Wavelength element; 13. Circuit board; 131. First board surface; 132. Second board surface; 133. First via hole; 134. Second via hole; 14. Housing;

[0030] 20. Signal transmission components;

[0031] 30. Filter;

[0032] 40. Antenna. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of 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.

[0034] It should be noted that when a component is referred to as being "fixed on" or "disposed on" another component, it may 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 may be directly or indirectly connected to the other component. The orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of description, and does 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 cannot be understood as a limitation on the present application. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances. The terms "first", "second", "third", and "fourth" are only used for the purpose of convenience of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0035] In the embodiments of the present application, the same reference numerals 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 the various components in the embodiments of the present application shown in the drawings are only exemplary and should not constitute any limitation to the present application.

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

[0037] In the related art, the coupling element usually adopts an integrated design, so that the coupling element couples the signal at one time. At different frequencies, especially when the filter is used in a wider frequency range, the superposition method of the coupling signal is relatively fixed, resulting in a large fluctuation in the coupling degree of the coupling device, 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 in the embodiment of the present application divides the coupling element into a first coupling section and a second coupling section that are separated from each other. The first coupling section and the second coupling section can respectively couple the signal to different degrees, and the first coupling section and the second coupling section are electrically connected by a wavelength element, so that the coupling signal of the first coupling section and the coupling signal of the second coupling section can be superimposed. At different frequencies, the coupling signal of the first coupling section and the coupling signal 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 in the embodiment of the present application is described below with reference to the accompanying drawings.

[0040] First, please also refer to Figures 1 to 3 The embodiment of the present application provides a coupling device 10, including a coupling element 11 and a wavelength element 12. The coupling element 11 includes a first coupling section 111 and a second coupling section 112 that are separated from each other, and the first coupling section 111 and the second coupling section 112 are both used to couple with a signal transmission element 20 that 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 separated from each other, which means that the first coupling section 111 and the second coupling section 112 are not in direct contact, so that the first coupling section 111 and the second coupling section 112 can be coupled with the signal transmission element 20 separately and individually.

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

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

[0044] The wavelength element 12 is a transmission element whose length has a specific proportional relationship with 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 to improve the performance of the coupling device 10. In some embodiments, the wavelength element 12 is in a bent structure so that the length of the wavelength element 12 can be set within a limited space. The bent 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. As an example, the housing 14 can be made of a signal shielding material, and the housing 14 is provided with a coupling port, through which the first coupling section 111 and the second coupling section 112 are coupled to the signal transmission element 20, so that the interference of external signals on the coupling element 11 can be reduced.

[0046] The coupling device 10 provided in the embodiment of the present application divides the coupling element 11 into a first coupling section 111 and a second coupling section 112 which are separated 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 coupling signal of the first coupling section 111 and the coupling signal of the second coupling section 112 can be superimposed. At different frequencies, the coupling signal of the first coupling section 111 and the coupling signal of 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 this application, please refer 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 both 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 may include a dielectric layer, and the coupling element 11 and the wavelength element 12 are both arranged on the dielectric layer, and the material of the dielectric layer may be glass cloth-based epoxy resin (FR4). Of course, in other embodiments, the material of the layered structure in the middle may also be paper-based phenolic resin, polyimide, etc., which is not specifically limited here.

[0049] By adopting the above technical solution, it is easy to realize the integrated design of the coupling device 10, effectively reduce the volume of the coupling device 10, and thus effectively realize the miniaturization of the coupling device 10.

[0050] In some embodiments of this application, please refer to Figure 3 and Figure 4 The circuit board 13 has a first board surface 131 and a second board surface 132 arranged opposite to each other. 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 to the second coupling body 1112. 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 to the fourth coupling body 1122.

[0051] In some embodiments, the second board surface 132 is arranged opposite 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 to 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 other embodiments, the first board surface 131 is arranged opposite 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 to 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 opposite to the signal transmission element 20, the wavelength element 12 is arranged on the first board surface 131 and is 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 to 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 some other embodiments, the second board surface 132 is arranged opposite to the signal transmission element 20, the wavelength element 12 is arranged on the second board surface 132 and is electrically connected between the second coupler 1112 and the fourth coupler 1122, the second coupler 1112 and the fourth coupler 1122 are respectively coupled to the signal transmission element 20, and the coupling signal generated by the second coupler 1112 and the coupling signal generated by the fourth coupler 1122 are superimposed through the wavelength element 12.

[0055] By adopting the above technical solution, the signal transmission element 20 can be coupled with the coupling element 11 on the first board surface 131, and can also be coupled with the coupling element 11 on the second board surface 132, which facilitates the assembly of the coupling device 10 and effectively improves the assembly flexibility of the coupling device 10.

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

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

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

[0059] In some embodiments, there are multiple first vias 133 , and the multiple first vias 133 are arranged in an array structure between the first coupling body 1111 and the second coupling body 1112 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 solution, it is convenient to electrically connect the first coupling body 1111 with the second coupling body 1112 , 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 a second via hole 134 penetrating the first board surface 131 and the second board surface 132 , and the third coupling body 1121 is electrically connected to the fourth coupling body 1122 through the second via hole 134 .

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

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

[0064] In some embodiments, there are multiple second via holes 134 , 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 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, it is convenient to electrically connect the third coupling body 1121 and the fourth coupling body 1122 , and the structure of the coupling device 10 is effectively simplified.

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

[0067] By adopting the above technical solution, it is convenient to electrically connect the first coupling body 1111 with the second coupling body 1112 and to electrically connect the third coupling body 1121 with the fourth coupling body 1122, thereby effectively simplifying the structure of the coupling device 10.

[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, where 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 frequency range in which the filter 30 operates. Accordingly, the sum of the lengths of the first coupling section 111 , the second coupling section 112 and the wavelength element 12 also changes accordingly.

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

[0071] By adopting the above technical solution, the coupling device 10 and other components in the communication device 100 (such as the signal transmission element 20, the filter 30, the antenna 40, the control unit, etc.) 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 segment 114, and the width and thickness of the coupling output segment 113.

[0074] By adopting the above technical solution, the coupling device 10 and other components in the communication device 100 (such as the signal transmission element 20, the filter 30, the antenna 40, the control unit, etc.) 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 disposed on the same side of the signal transmission element 20 and are separated from each other along the signal transmission direction of the signal transmission element 20 .

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

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

[0078] The first coupling section 111 and the second coupling section 112 are separated and arranged along the signal transmission direction of the signal transmission element 20, which means that when the signal is transmitted from the filter 30 to the antenna 40, 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 above technical solution, 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 this application, please refer to Figure 3The coupling element 11 further includes a coupling output section 113 and an isolation section 114 . The coupling output section 113 is electrically connected to the first coupling section 111 , and the isolation section 114 is electrically connected to the second coupling section 112 .

[0081] The isolation section 114 is used to achieve 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 leaking directly 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, rather than the coupling signal being directly connected to the coupling signal output port without coupling, thereby improving the isolation index of the coupling device 10 and ensuring the normal operation of the coupling device 10 and accurate detection and processing of signals.

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

[0083] By adopting the above technical solution, it is convenient for the coupling device 10 to output the coupling signal.

[0084] See also Figure 6 , Figure 6 A simulation diagram of a coupling device 10 in the prior art is shown. Figure 6 In the figure, the operating frequency band of the filter 30 is 617MHz-960MHz, and the two worst sideband indicators are 700MHz (coupling degree = -30.4dB) and 960MHz (coupling degree = -26.7dB), respectively. Therefore, the coupling fluctuation of the coupling device 10 is 3.7dB.

[0085] See also Figure 7 , Figure 7 A simulation diagram of the coupling device 10 provided in an embodiment of the present application is shown. Figure 7 In the figure, the operating frequency band of the filter 30 is 617MHz-960MHz, and the two worst sideband indicators are 700MHz (coupling degree = -30.8dB) and 960MHz (coupling degree = -28.8dB), respectively. It can be concluded 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 the coupling fluctuation of the coupling device 10 provided in the embodiment of the present application. Therefore, it can be concluded that the flatness of the coupling device 10 provided in the embodiment of the present application is much better than the flatness of the coupling device 10 in the prior art.

[0087] Second, please also refer to Figure 1 and Figure 2 An embodiment of the present application provides a communication device 100, including a filter 30, an antenna 40, a signal transmission element 20 and a coupling device 10 described in any 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 to the signal transmission element 20.

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

[0089] The antenna 40 is a device for converting electrical signals into electromagnetic waves. At the transmitting end, the antenna 40 converts electrical signals in the form of high-frequency current or waveguide into electromagnetic waves and radiates them into space. At the receiving end, the antenna 40 converts electromagnetic waves in space into electrical signals and transmits them to the receiving device. The antenna 40 may 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. The signal transmission element 20 can guide the transmission of the signal to ensure that the signal maintains its integrity and accuracy during the transmission process. 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 in the embodiment of the present application adopts the coupling device 10 described in any one of the above embodiments, thereby effectively improving the performance of the communication device 100.

[0092] In some embodiments of this application, please refer 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 this embodiment, the first coupling section 111 and the second coupling section 112 can be coupled microstrips or coupled lines, and the signal transmission element 20 can be a signal transmission line, such as a coaxial line, and 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 spacing between the first coupling segment 111 and the signal transmission element 20 is equal to the spacing between the second coupling segment 112 and the signal transmission element 20, which can improve the consistency of the coupling degree of the first coupling segment 111 and the coupling degree of the second coupling segment 112, thereby further improving the flatness of the coupling device 10.

[0095] By adopting the above technical solution, 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 are only optional embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should 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 section and a second coupling section which are separated from each other, wherein the first coupling section and the second coupling section are both used to couple with a signal transmission element which is electrically connected between the filter and the antenna; The wavelength element is electrically connected between the first coupling section and the second coupling section.

2. The coupling device according to claim 1, characterized in that: The coupling device further comprises a circuit board, and the coupling element and the wavelength element are both arranged on the circuit board.

3. The coupling device according to claim 2, characterized in that: The circuit board comprises a first board surface and a second board surface arranged opposite to each other, the first coupling section 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 to the second coupling body, the second coupling section 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 is electrically connected to the fourth coupling body.

4. The coupling device according to claim 3, characterized in that: The wavelength element is disposed on the first panel and electrically connected between the first coupler and the third coupler; or, The wavelength element is arranged on the second panel and is electrically connected between the second coupling body and the fourth coupling body.

5. The coupling device according to claim 3, characterized in that: The circuit board is provided with a first via hole penetrating the first board surface and the second board surface, and the first coupling body is electrically connected to the second coupling body 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, and the third coupling body is electrically connected to the fourth coupling body through the second via hole.

6. The coupling device according to any one of claims 1 to 5, characterized in that: The sum of the lengths of the first coupling section, the second coupling section and the wavelength element is λ / 4, where λ is the wavelength corresponding to the center frequency of the filter.

7. The coupling device according to any one of claims 1 to 5, characterized in that: The output impedance of the coupling device is 50Ω.

8. The coupling device according to any one of claims 1 to 5, characterized in that: The first coupling section and the second coupling section are arranged on the same side of the signal transmission element and are separated from each other along the signal transmission direction of the signal transmission element.

9. The coupling device according to any one of claims 1 to 5, characterized in that: The coupling element further includes a coupling output section and an isolation section. The coupling output section is electrically connected to the first coupling section, and the isolation section is electrically connected to the second coupling section.

10. A communication device, characterized in that: The communication device includes a filter, an antenna, a signal transmission element and a coupling device as described in any one of claims 1-9, the signal transmission element is electrically connected between the filter and the antenna, and the first coupling section and the second coupling section are both coupled to the signal transmission element.

11. The communication device according to claim 10, characterized in that The first coupling section and the second coupling section are both arranged in parallel with the signal transmission element.

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