Radio frequency transmission optical module, interface and communication equipment

Abstract

The embodiment of the invention provides a radio frequency transmission optical module, an interface and communication equipment, relates to the technical field of communication, and aims to solve the problem that a golden finger connector of an optical module for transmitting analog signals may be misplug with an interface of an optical module for transmitting digital signals. The radio frequency transmission optical module comprises a shell and a golden finger connector arranged in the shell, and the golden finger connector is used for being connected with the interface; the golden finger connector comprises a substrate, the substrate comprises a substrate body and a first protruding part, the substrate body comprises a first side face, and the first protruding part is connected with the first side face. The arrangement of the first protruding part is equal to the increase of the width of the golden finger connector, so that the width of the golden finger connector is larger than the width of the interface of the optical module for transmitting the digital signals, and when the golden finger connector is wrongly inserted into the interface of the optical module for transmitting the digital signals, the golden finger connector cannot be inserted due to the blocking of the first protruding part. And misplug of golden finger connectors of optical modules of different signal types can be avoided.

Description

Technical Field

[0001] This application relates to the field of communication technologies, and particularly to a radio frequency transmission optical module, an interface, and a communication device. Background Art

[0002] The pluggable optical module device is mainly applied to the optoelectronic conversion and transmission device. The optical module converts the optical signal into an electrical signal, and then transmits the electrical signal to the circuit board of the device through the connector to achieve optoelectronic conversion. The application of the pluggable optical module device includes the cooperation of the optical module, the connector, the PCB board, and the handle strip panel to install and fix each component and ensure the reliability of signal transmission.

[0003] In actual applications, there is a scenario where the optical module for transmitting analog signals is used in the same station as the optical module for transmitting digital signals. Since the connectors and the cage sizes of these two types of optical modules are the same, there is a risk of misinsertion. Summary of the Invention

[0004] Embodiments of this application provide a radio frequency transmission optical module, an interface adapted to the radio frequency transmission optical module, and a communication device. It is used to improve the problem that the gold finger connector of the radio frequency transmission optical module for transmitting analog signals may be misinserted into the interface of the optical module for transmitting digital signals.

[0005] In a first aspect, embodiments of this application provide a radio frequency transmission optical module. The radio frequency transmission optical module includes a housing and a gold finger connector disposed in the housing. The gold finger connector is used to connect to the interface. The gold finger connector includes a substrate, and the substrate includes a substrate body and a first protrusion. The substrate body includes a first side surface, and the first protrusion is connected to the first side surface.

[0006] In the radio frequency transmission optical module provided by the embodiments of this application, the gold finger connector is provided with a first protrusion on the first side surface of the substrate body, which is equivalent to increasing the width of the gold finger connector, so that the width of the gold finger connector is greater than the width of the interface of the optical module for transmitting digital signals. When the gold finger connector is misinserted into the interface of the optical module for transmitting digital signals, the gold finger connector cannot be inserted due to the blockage of the first protrusion, which can avoid the misinsertion of the gold finger connectors and interfaces of optical modules of different signal types and prevent problems such as short circuits and board burning.

[0007] In a possible implementation manner, the substrate further includes a second protrusion. The substrate body includes a second side surface opposite to the first side surface, and the second protrusion is connected to the second side surface. The first protrusion and the second protrusion are respectively disposed on both sides of the substrate body to jointly prevent misinsertion and achieve low-cost physical anti-fooling.

[0008] In a possible implementation, the lengths of the first protrusion and the second protrusion in the insertion and extraction direction of the gold finger connector are less than or equal to the length of the substrate body in the insertion and extraction direction of the gold finger connector.

[0009] In a possible implementation, the thicknesses of the first protrusion and the second protrusion are less than or equal to the thickness of the body.

[0010] In a possible implementation, the thicknesses of the first protrusion and the second protrusion are different. By using the different thicknesses of the first protrusion and the second protrusion, it can be used to distinguish the front and back sides of the gold finger connector.

[0011] In a possible implementation, the gold finger connector includes a first gold finger module and a second gold finger module; the substrate body includes a first surface, and the first gold finger module and the second gold finger module are distributed along a first direction on the first surface, and the first direction is the direction perpendicular to the insertion and extraction direction of the substrate surface and the gold finger connector; the first gold finger module includes a plurality of signal terminals distributed along the first direction, and the second gold finger module includes a plurality of signal terminals distributed along the first direction.

[0012] In a possible implementation, the substrate body is provided with a receiving groove, and the first gold finger module and the second gold finger module are distributed on both sides of the receiving groove.

[0013] In a possible implementation, a metal layer is provided on the inner wall of the receiving groove, and the metal layer is connected to the ground terminal of the radio frequency transmission optical module.

[0014] In a possible implementation, the cross-sectional width of the substrate in the first direction is 9.3 mm to 12 mm, and the first direction is the direction perpendicular to the insertion and extraction direction of the substrate surface and the gold finger connector.

[0015] In a possible implementation, the width of the first protrusion in the first direction is 0.1 mm to 1.5 mm; the width of the second protrusion in the first direction is 0.1 mm to 1.5 mm.

[0016] In a possible implementation, the substrate body, the first protrusion and the second protrusion are integrally formed.

[0017] In a second aspect, an embodiment of the present application provides an interface for mating and connecting with the gold finger connector of the radio frequency transmission optical module provided by any implementation manner of the first aspect. The interface includes a housing that forms a receiving cavity. The receiving cavity includes a first side wall, and a first groove is provided on the first side wall. When the gold finger connector is mated and connected with the interface, the first protrusion of the gold finger connector is received in the first groove. The interface provided by the present application has corresponding improvements corresponding to the gold finger connector. Corresponding to the first protrusion of the gold finger connector, a first groove is provided on the first side wall of the receiving cavity. When the gold finger connector is mated with the interface, the first protrusion can be received in the first groove, so that connectors and interfaces of the same type can be adapted, and connectors and interfaces of different types are not adapted, avoiding problems such as incorrect insertion.

[0018] In a possible implementation manner, the receiving cavity includes opposite first and second side walls, and a second groove is provided on the second side wall. When the gold finger connector is mated and connected with the interface, the second protrusion of the gold finger connector is received in the second groove. In the case where the gold finger connector is respectively provided with a first protrusion and a second protrusion, the interface is provided with a first groove corresponding to the first protrusion and a second groove corresponding to the second protrusion. Thus, when the gold finger connector is mated and connected with the interface, the first protrusion can be received in the first groove, and the second protrusion can be received in the second groove, realizing the adaptation of the interface and the gold finger connector.

[0019] In a possible implementation manner, the interface further includes a first elastic sheet module, a second elastic sheet module, and an isolation rib. The first elastic sheet module, the second elastic sheet module, and the isolation rib are disposed in the receiving cavity. Among them, the isolation rib is disposed between the first elastic sheet module and the second elastic sheet module, and the isolation rib separates the first elastic sheet module and the second elastic sheet module in different chambers of the receiving cavity. When the gold finger connector is mated and connected with the interface, the isolation rib is received in the receiving groove of the gold finger connector; the first elastic sheet module includes a plurality of first elastic sheets distributed along a first direction. The first end of the first elastic sheet is used for connecting with a circuit board, and the second end of the first elastic sheet is used for abutting against the gold finger connector; the second elastic sheet module includes a plurality of second elastic sheets distributed along the first direction. The first end of the second elastic sheet is used for connecting with the circuit board, and the second end of the second elastic sheet is used for abutting against the gold finger connector.

[0020] In a possible implementation manner, a metal elastic sheet is provided on the surface of the isolation rib. When the gold finger connector is mated and connected with the interface, the isolation rib can be received in the receiving groove of the gold finger connector, and the metal elastic sheet on the isolation rib can abut against the metal layer on the inner wall of the receiving groove of the gold finger connector. For example, the metal elastic sheet can be grounded. In this way, grounding can be provided for the radio frequency transmission optical module by the abutting of the metal elastic sheet and the metal layer.

[0021] In a third aspect, an embodiment of the present application provides a connector assembly, including a gold finger connector and an interface. The gold finger connector includes a substrate, and the substrate includes a substrate body and a first protrusion. The substrate body includes a first side surface, and the first protrusion is connected to the first side surface. The interface includes a housing, and the housing forms a receiving cavity. The receiving cavity includes a first side wall, and a first groove is provided on the first side wall. When the gold finger connector is connected to the interface in a mating manner, the first protrusion is received in the first groove.

[0022] In a possible implementation manner, the substrate body includes a second side surface opposite to the first side surface, and the substrate further includes a second protrusion. The second protrusion is connected to the second side surface. The receiving cavity of the housing further includes a second side wall opposite to the first side wall, and a second groove is provided on the second side wall. When the gold finger connector is connected to the interface in a mating manner, the second protrusion is received in the second groove.

[0023] In a possible implementation manner, the gold finger connector includes a first gold finger module and a second gold finger module. The substrate body includes a first surface, and the first gold finger module and the second gold finger module are distributed along a first direction on the first surface. The first gold finger module includes a plurality of signal terminals distributed along the first direction, and the second gold finger module includes a plurality of signal terminals distributed along the first direction. The interface further includes a first elastic sheet module, a second elastic sheet module, and an isolation rib. The first elastic sheet module, the second elastic sheet module, and the isolation rib are disposed in the receiving cavity. Among them, the isolation rib is disposed between the first elastic sheet module and the second elastic sheet module, and the isolation rib separates the first elastic sheet module and the second elastic sheet module in different chambers of the receiving cavity. The first elastic sheet module includes a plurality of first elastic sheets distributed along the first direction. The first end of the first elastic sheet is used to connect to a circuit board. When the gold finger connector is connected to the interface in a mating manner, the second end of the first elastic sheet abuts against the first gold finger module. The second elastic sheet module includes a plurality of second elastic sheets distributed along the first direction. The first end of the second elastic sheet is used to connect to a circuit board. When the gold finger connector is connected to the interface in a mating manner, the second end of the second elastic sheet abuts against the second gold finger module.

[0024] In a possible implementation manner, a receiving groove is provided in the substrate body. When the gold finger connector is connected to the interface in a mating manner, the isolation rib is received in the receiving groove.

[0025] In a possible implementation manner, a metal elastic sheet is provided on the surface of the isolation rib, and a metal layer is provided on the inner wall of the receiving groove. When the isolation rib is received in the receiving groove, the metal elastic sheet abuts against the metal layer.

[0026] In a possible implementation manner, the cross-sectional width of the substrate in the first direction is 9.3 millimeters to 12 millimeters.

[0027] In a possible implementation, the width of the first protrusion in the first direction is 0.1 mm to 1.5 mm; the width of the second protrusion in the first direction is 0.1 mm to 1.5 mm.

[0028] Fourthly, an embodiment of the present application further provides a communication device, which includes a circuit board and an interface provided in any implementation manner of the second aspect, and the interface is disposed on the circuit board. Description of the Drawings

[0029] Figure 1 It is a schematic diagram of the communication system provided by the embodiment of the present application;

[0030] Figure 2 It is a schematic diagram of an optical module for transmitting digital signals provided by the embodiment of the present application;

[0031] Figure 3 It is a schematic diagram of a gold finger connector and an interface of an optical module for transmitting digital signals provided by the embodiment of the present application;

[0032] Figure 4 It is a schematic diagram of an optical module for transmitting analog signals provided by the embodiment of the present application;

[0033] Figure 5 It is a comparative schematic diagram of gold finger connectors and interfaces of two optical modules provided by the embodiment of the present application;

[0034] Figure 6 It is a schematic diagram of the function definition of signal terminals of a gold finger connector provided by the embodiment of the present application;

[0035] Figure 7 It is a schematic diagram of a radio frequency transmission optical module provided by the embodiment of the present application;

[0036] Figure 8 It is a schematic diagram of a gold finger connector of a radio frequency transmission optical module provided by the embodiment of the present application;

[0037] Figure 9 It is a comparative schematic diagram of two gold finger connectors provided by the embodiment of the present application;

[0038] Figure 10 It is a schematic diagram of a gold finger connector provided by the embodiment of the present application;

[0039] Figure 11 It is a cross-sectional schematic diagram of a gold finger connector provided by the embodiment of the present application;

[0040] Figure 12 It is a dimensional schematic diagram of a gold finger connector provided by the embodiment of the present application;

[0041] Figure 13Schematic diagram of another type of gold finger connector provided by an embodiment of the present application;

[0042] Figure 14 Schematic diagram of another type of gold finger connector provided by an embodiment of the present application;

[0043] Figure 15 Cross-sectional schematic diagram of another type of gold finger connector provided by an embodiment of the present application;

[0044] Figure 16 Dimension schematic diagram of another type of gold finger connector provided by an embodiment of the present application;

[0045] Figure 17 Schematic diagram of the structure of an interface provided by an embodiment of the present application;

[0046] Figure 18 Cooperating schematic diagram of the gold finger connector and the interface provided by an embodiment of the present application;

[0047] Figure 19 Schematic diagram of the interface provided by an embodiment of the present application;

[0048] Figure 20 Schematic diagram of the structure of another type of interface provided by an embodiment of the present application;

[0049] Figure 21 Schematic diagram of the principle of preventing misinsertion provided by an embodiment of the present application. Detailed implementation manners

[0050] Next, the technical solutions in the embodiments of the present application will be described in conjunction with the accompanying drawings in the embodiments of the present application. In the present application, "at least one" means one or more, and "a plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone, where A and B may be singular or plural. "At least one (item)" or similar expressions thereof refer to any combination of these items, including any combination of single item (item) or plural items (items). For example, at least one (item) of a, b, or c may represent: a, b, c, a and b, a and c, b and c, or a, b, and c, where a, b, and c may be single or multiple.

[0051] In the embodiments of the present application, terms such as "first" and "second" are used to distinguish objects with similar names, functions, or roles. Those skilled in the art can understand that terms such as "first" and "second" do not limit the quantity and execution order. The term "coupled" is used to represent an electrical connection, including being directly connected through a wire or a connection terminal or being indirectly connected through other devices. Therefore, "coupled" should be regarded as a broad sense of electronic communication connection.

[0052] It should be noted that in this application, words such as "exemplary" or "for example" are used to represent examples, illustrations or explanations. Any embodiment or design solution described as "exemplary" or "for example" in this application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of words such as "exemplary" or "for example" is intended to present relevant concepts in a specific manner.

[0053] The solution provided by the embodiments of this application can be applied to a communication system, such as an indoor wireless communication system. Taking an indoor base station as an example, refer to Figure 1 , the base station includes a baseband unit (BBU), a remote radio unit hub (RHUB), and a remote radio unit (RRU). Among them, the RHUB is called the mother end, and the RRU is called the head end. The signal is transmitted between the RHUB and the RRU through an optical fiber, usually a digital signal. The RRU includes a conversion circuit for converting the digital signal into an analog signal and then transmitting it through an antenna for users to use.

[0054] A radio frequency transmission optical module is an optoelectronic device used for optoelectronic conversion and electro-optic conversion. The transmitting end of the radio frequency transmission optical module converts an electrical signal into an optical signal, and the receiving end converts the optical signal into an electrical signal. For example, in the BBU, an electrical signal is converted into an optical signal through a radio frequency transmission optical module, and the signal is transmitted to the RHUB through an optical fiber. After the signal reaches the RHUB, it is converted into an electrical signal through another radio frequency transmission optical module for the RHUB to process.

[0055] Figure 1 In the shown communication system, a digital signal is transmitted through an optical fiber, and the optoelectronic conversion and electro-optic conversion are completed by a radio frequency transmission optical module. This radio frequency transmission optical module can also be called a digital optical module. Digital optical modules are classified according to the package form. Commonly seen ones include Small Formfactor Pluggable (SFP), Small Formfactor Pluggable Plus (SFP+), etc. Refer to Figure 2 , Figure 2 shows a schematic diagram of a digital optical module that meets the SFP protocol.

[0056] One end of the digital optical module is provided with an optical fiber interface for connecting an optical fiber, and the other end of the digital optical module is provided with a gold finger connector. The digital optical module is connected to the main board of communication devices such as BBU, RHUB, or RRU through the cooperation of the gold finger connector and the interface. For example, an interface is provided on the main board of the above-mentioned communication device, and the gold finger connector of the digital optical module can be inserted into the above interface and connected in cooperation with the interface, so that the signal transmitted on the optical fiber can be converted into an electrical signal and transmitted to communication devices such as BBU, RHUB, or RRU, or the electrical signal of communication devices such as BBU, RHUB, or RRU can be converted into an optical signal and transmitted through the optical fiber.

[0057] See Figure 3 , Figure 3 shows Figure 2 a schematic diagram of the gold finger connector of the digital optical module and the corresponding interface shown. The gold finger connector of the digital optical module (hereinafter simply referred to as the gold finger connector) includes an upper surface and a lower surface (only one of the surfaces is shown in the figure). A plurality of signal terminals are provided on both the upper surface and the lower surface of the gold finger connector. Correspondingly, the interface includes a receiving cavity, and the gold finger connector can be inserted into the receiving cavity. Two sets of upper and lower metal elastic sheets are provided in the receiving cavity. When the gold finger connector is inserted into the interface and connected in cooperation with the interface, one end of the metal elastic sheet located in the upper part of the receiving cavity is in one-to-one correspondence and abuts against a plurality of signal terminals on the upper surface of the gold finger connector, and one end of the metal elastic sheet located in the lower part of the receiving cavity is in one-to-one correspondence and abuts against a plurality of signal terminals on the lower surface of the gold finger connector, and the other end of the metal elastic sheet of the interface is connected to the circuit board of the communication device. Through the way that the metal elastic sheet of the interface abuts against the signal terminals of the gold finger connector, bidirectional transmission of signals is realized.

[0058] As mentioned in the foregoing example, in the case of transmitting digital signals through optical fibers, a conversion circuit needs to be provided in the RRU to convert digital signals into analog signals. With the development of technology, according to statistics, the power consumption of base stations in the 5G era will be several times higher than that in the 4G era. At the same time, for scenarios such as high frequency, the bandwidth requirement is greater, and the requirement for signal quality is also getting higher and higher, which leads to an increase in the power consumption and volume of the head end.

[0059] Radio-over-fiber (RoF) technology is a wireless access technology that combines optical fiber communication and wireless communication developed in response to the demand for high-speed and large-capacity wireless communication. At the mother end, microwaves are modulated onto lasers, and then the modulated light waves are transmitted through a complex optical fiber link. After reaching the head end, optoelectronic conversion demodulates the microwave signal, and then it is transmitted through an antenna for users to use. RoF technology can move parts such as digital intermediate frequency from the head end to the mother end, transmit analog signals with high quality, reduce the power consumption and volume of the head end, and is expected to become a key technology for the next generation of wireless communication.

[0060] In the RoF technology, an analog signal is modulated onto an optical signal for transmission. Since an analog signal is transmitted, an electro-optic conversion or opto-electric conversion of the (analog signal) needs to be implemented by a radio frequency optical module. Therefore, such an optical module can also be called an analog optical module. Refer to Figure 4 , Figure 4 FIG. shows a schematic diagram of another radio frequency transmission optical module provided by an embodiment of the present application. The radio frequency transmission optical module is used to convert or transmit an analog signal, and thus can also be called an analog optical module. Since there are no clear standards for the interfaces, appearance, and performance indicators of current analog optical modules, considering compatibility and weak perception by users, the radio frequency transmission optical module provided by the embodiment of the present application is compatible with the SFP protocol in terms of external dimensions.

[0061] The analog optical module provided by the embodiment of the present application is compatible with the SFP protocol in terms of external dimensions, that is, their external dimensions are the same, and the dimensions of the corresponding interfaces are also the same as those of the digital optical module. In terms of connectors, due to the requirements for the electrical port isolation of the analog optical module, a re-design is made based on the SPF protocol for the electrical interface, and a slot is made in the middle of the gold finger connector. The corresponding interface is also designed accordingly. A retaining rib is provided in the receiving cavity of the interface of the analog optical module. When the gold finger connector of the analog optical module is cooperatively connected with the interface of the analog optical module, the retaining rib of the interface is received in the slot opened in the gold finger connector, so that the two can be adapted.

[0062] Combined with Figure 1 , since the BBU and the RHUB transmit digital signals, while the RHUB and the RRU transmit analog signals, there may be a scenario where digital optical modules and analog optical modules share a station. And since the external dimensions of the analog optical module are the same as those of the digital optical module, and the widths of the gold finger connectors of the analog optical module and the digital optical module are also the same, there may be a situation where the two types of optical modules are misinserted. For example, the gold finger of the analog optical module is accidentally inserted into the interface of the digital optical module.

[0063] Refer to Figure 5 and Figure 6 , Figure 5 FIG. shows a comparison schematic diagram of the gold finger connectors of two optical modules provided by the embodiment of the present application and the corresponding interfaces. Figure 6 FIG. shows a schematic diagram of the functional definition of the signal terminals of the interface (or gold finger connector) of the digital optical module. Since the number and arrangement of the signal terminals of the interface (or gold finger connector) of the analog optical module are different from those of the signal terminals of the interface (or gold finger connector) of the digital optical module. Therefore, if the gold finger connector of the digital optical module is inserted into the interface of the analog optical module or the gold finger connector of the analog optical module is inserted into the interface of the digital optical module, there may be a short circuit and damage to the device.

[0064] There is a stop rib inside the interface of the analog optical module, and the gold finger connector of the digital optical module does not have a groove. Therefore, when the gold finger connector of the digital optical module is inserted into the connector of the analog optical module, it cannot be inserted due to the blockage of the stop rib inside the interface of the analog optical module, which can prevent the gold finger connector of the digital optical module from being misinserted into the interface of the analog optical module. However, the width of the gold finger connector of the analog optical module is the same as that of the gold finger connector of the digital optical module. When the connector of the analog optical module is misinserted into the interface of the digital optical module, the grounding part of the gold finger connector of the analog optical module has a probability of contacting the VCC elastic sheet of the interface of the digital optical module, posing risks of large board short circuit, sparking, and board burning. And devices such as BBU, RHUB, and RRU are costly, and physical anti-fooling methods are needed to ensure that the devices are not damaged.

[0065] Since there are already mature and common protocols or standards for the gold finger connectors, interfaces, etc. of the digital optical module and it is not easy to change, the embodiments of the present application provide an optical module. By improving the size of the gold finger connector of the optical module and making corresponding improvements to the adapted interface, it is possible to avoid the gold finger connection area of the analog optical module from being misinserted into the interface of the digital optical module or the gold finger connector of the digital optical module from being misinserted into the interface of the analog optical module.

[0066] Combined with Figure 7 and Figure 8 , Figure 7 shows a schematic diagram of the radio frequency transmission optical module provided by the embodiments of the present application. The radio frequency transmission optical module includes a housing and a gold finger connector 100 disposed inside the housing. The gold finger connector 100 is used to connect to an interface. Figure 8 Shows Figure 7 a schematic structural diagram of the gold finger connector 100 of the radio frequency transmission optical module shown in

[0067] Combined with Figure 8 , the gold finger connector 100 includes a substrate 110. The substrate 110 includes a substrate body 111 and a first protruding portion 112. The substrate body 111 includes a first surface 111C, a second surface (not shown in the figure), a first side surface 111A, and a second side surface 111B. The first side surface 111A and the second side surface 111B are oppositely disposed. The first surface 111C and the second surface 111D are two oppositely disposed surfaces. The first surface 111C can also be referred to as the upper surface, and the second surface can be referred to as the lower surface.

[0068] Please combine Figure 8 and Figure 9 , the first protruding portion 112 of the gold finger connector 100 provided by the embodiments of the present application is connected to the first side surface 111A. After the first protruding portion 112 is provided, refer to Figure 9, compared with the gold finger connector of the digital optical module, the width of the gold finger connector 100 of the radio frequency transmission optical module provided by the embodiment of the present application is greater than the width of the gold finger connector of the digital optical module. Since the width of the interface of the digital optical module is adapted to the width of the gold finger connector of the digital optical module, the width of the gold finger connector 100 of the radio frequency transmission optical module provided by the embodiment of the present application is also greater than the width of the corresponding interface of the digital optical module, which can prevent the gold finger connector 100 of the radio frequency transmission optical module provided by the embodiment of the present application from being misinserted into the interface of the digital optical module, and avoid situations such as circuit board short - circuit and equipment damage.

[0069] Exemplarily, the length of the first protrusion 112 in the plug - in and unplug - in direction of the gold finger connector may be less than or equal to the length of the substrate body 111 in the plug - in and unplug - in direction of the gold finger connector. Please refer to Figure 10 Figure a and Figure b in Figure 10 In Figure a shown in Figure 10 the length of the first protrusion 112 of the gold finger connector 100 in the plug - in and unplug - in direction of the gold finger connector is less than the length of the substrate body 111 in the plug - in and unplug - in direction of the gold finger connector.

[0070] Exemplarily, Figure 11 shows a cross - sectional schematic diagram of the gold finger connector 100. Combining with Figure 11 Figure a in Figure 11 the thickness of the first protrusion 112 may also be less than the thickness of the substrate body 111, or, combining with

[0071] Figure b in Figure 8 and Figure 12 , the width w1 of the gold finger connector 100 of the radio frequency transmission optical module provided by the embodiment of the present application in the first direction is 9.3 mm to 12 mm, for example, it may be 10.03 mm, and the width w2 of the substrate body 111 of the gold finger connector 100 in the first direction is about 9.2 mm. On this basis, the width w3 of the first protrusion 112 in the first direction is 0.1 mm to 1.5 mm. The first protrusion 112 and the substrate body 111 may be integrally formed. After setting the first protrusion 112, the size of the substrate 110 of the gold finger connector 100 is increased, so that the gold finger connector 100 of the radio frequency transmission optical module provided by the embodiment of the present application cannot be inserted into the interface of the digital optical module due to the blockage of the first protrusion 112.

[0072] Refer to in combination with Figure 8 and Figure 13 On the first surface 111C of the substrate body 111, a first gold finger module 120 and a second gold finger module 130 arranged along the first direction are provided. The first direction is the direction perpendicular to the insertion and extraction direction of the gold finger connector 100 with respect to the first surface 111C. The first gold finger module 120 may include a plurality of signal terminals 121 arranged along the first direction. The signal terminals 121 are also referred to as gold fingers. The second gold finger module 130 may include a plurality of signal terminals 131 arranged along the first direction.

[0073] In a possible implementation manner, similar to the first surface 111C, on the second surface (not shown in the figure) of the substrate body 111, a third gold finger module and a fourth gold finger module arranged and distributed along the first direction are provided. The third gold finger module includes a plurality of signal terminals arranged along the first direction, and the fourth gold finger module includes a plurality of signal terminals arranged along the first direction.

[0074] The signal terminals are used to transmit signals. The signal terminals are connected to the optoelectronic conversion circuit or the electro-optical conversion circuit of the radio frequency transmission optical module. For the functional definition, arrangement method, etc. of the signal terminals, reference can be made to Figure 5 the examples shown in, which will not be elaborated here. When the gold finger connector 100 of the radio frequency transmission optical module is connected in cooperation with the interface, the signal terminals abut against the elastic pieces in the interface, thereby signals can be transmitted.

[0075] In a possible implementation manner, please continue to refer to in combination with Figure 14 The substrate body 111 may be provided with a receiving groove 140. The receiving groove 140 may be located between the first gold finger module 120 and the second gold finger module 130. In a possible implementation manner, the receiving groove 140 may be a U-shaped groove. Based on such a design, when the gold finger connector 100 of the radio frequency transmission optical module is connected in cooperation with the interface, the isolation rib of the interface can be received in the receiving groove 140. Exemplarily, the width of the receiving groove 140 may be from 0.5 mm to 3 mm. For example, the width of the receiving groove 140 may be 1 mm.

[0076] In a possible implementation, a metal layer 141 is provided on the inner wall of the receiving groove 140, and the metal layer 141 is connected to the ground terminal of the radio frequency transmission optical module. When the gold finger connector 100 of the radio frequency transmission optical module is connected to the interface in a mating manner, the isolation rib of the interface can be received in the receiving groove 140, and a metal elastic piece can be provided on the surface of the isolation rib. When the isolation rib is received in the receiving groove 140, the metal elastic piece of the isolation rib can be in contact with the metal layer 141 of the receiving groove 140. Generally, the metal elastic piece of the isolation rib can be grounded, and grounding can be provided for the radio frequency transmission optical module by the contact between the metal elastic piece of the isolation rib and the metal layer 141 of the receiving groove 140.

[0077] In the above example, the substrate 110 of the gold finger connector 100 includes a first protruding portion 112, and the first protruding portion 112 is connected to the first side surface 111A of the substrate body 111. In another possible implementation, please continue to refer to Figure 14 that the substrate 110 of the gold finger connector 100 further includes a second protruding portion 113, and the second protruding portion 113 is connected to the second side surface 111B of the substrate body 111. The first protruding portion 112 and the second protruding portion 113 are disposed opposite to each other. The substrate body 111, the first protruding portion 112, and the second protruding portion 113 can be integrally formed. The simultaneous arrangement of the first protruding portion 112 and the second protruding portion 113 on both sides of the gold finger connector 100 can increase the width of the gold finger connector 100 of the radio frequency transmission optical module, and jointly play a role in physical anti-misinsertion, avoiding the misinsertion of the radio frequency transmission optical module provided in the embodiment of the present application into the interface corresponding to the digital optical module.

[0078] The structure and principle of the second protruding portion 113 are basically the same as those of the first protruding portion 112, and only a brief description is given in the embodiment of the present application. Exemplarily, the lengths of the first protruding portion 112 and the second protruding portion 113 in the insertion and extraction direction of the gold finger connector can be less than the length of the substrate body 111 in the insertion and extraction direction of the gold finger connector. When the radio frequency transmission optical module provided in the embodiment of the present application is misinserted into the interface of the digital optical module, due to the presence of the first protruding portion 112 and the second protruding portion 113, the width of the gold finger connector 100 in the first direction is greater than the width of the receiving cavity of the interface of the digital optical module, which can prevent the gold finger connector 100 from being inserted into the interface of the digital optical module.

[0079] In a possible implementation, the lengths of the first protrusion 112 and the second protrusion 113 in the insertion and extraction direction of the gold finger connector may be the same as the length of the substrate body 111 in the insertion and extraction direction of the gold finger connector. In this way, the first protrusion 112 is equivalent to the substrate body 111 being widened as a whole in the direction from the second side surface 111B towards the first side surface 111A, and the second protrusion 113 is equivalent to the substrate body 111 being widened as a whole in the direction from the first side surface 111A towards the second side surface 111B. The width of the substrate body 111 of the widened gold finger connector 100 is greater than the width of the accommodation cavity 211 of the interface 200 of the digital optical module, which can prevent the gold finger connector 100 from being inserted into the interface 200 of the digital optical module.

[0080] In a possible implementation, the thicknesses of the first protrusion 112 and the second protrusion 113 may be less than the thickness of the substrate body 111. In another possible implementation, combined with Figure 15 , the thicknesses of the first protrusion 112 and the second protrusion 113 may also be the same as the thickness of the substrate body 111.

[0081] In addition, the thicknesses of the first protrusion 112 and the second protrusion 113 may be the same or different. When the thickness of the first protrusion 112 is different from the thickness of the second protrusion 113, by making corresponding adjustments to the size of the interface, the direction of the gold finger connector 100 can be distinguished by the different thicknesses of the first protrusion 112 and the second protrusion 113. For example, it can be used to distinguish whether the first surface or the second surface of the substrate body 111 of the gold finger connector 100 is facing up.

[0082] Referring to Figure 16 , the width w1 of the gold finger connector 100 of the radio frequency transmission optical module provided in the embodiment of the present application in the first direction is 9.3 mm to 12 mm, while the width w2 of the substrate body 111 of the gold finger connector 100 in the first direction is about 9.2 mm. The widths of the first protrusion 112 and the second protrusion 113 may be the same. On this basis, the width w3 of the first protrusion 112 in the first direction is 0.1 mm to 1.5 mm, and the width w3 of the second protrusion 113 in the first direction is 0.1 mm to 1.5 mm. The setting of the first protrusion 112 and the second protrusion 113 increases the size of the substrate 110 of the gold finger connector 100, so that the gold finger connector 100 of the radio frequency transmission optical module provided in the embodiment of the present application cannot be inserted into the interface of the digital optical module due to the blocking of the first protrusion 112 and the second protrusion 113, which can prevent misinsertion.

[0083] Due to the increase in the width of the gold finger connector of the radio frequency transmission optical module, in order to adapt to the gold finger connector, an embodiment of the present application further provides an interface, which can be installed on the circuit board of devices such as BBU, RHUB, and RRU, and is used to cooperate with the gold finger connector of the radio frequency transmission optical module for connection. Refer to Figure 17 , Figure 17 Figure a in Figure 17 shows a schematic structural diagram of the interface provided by the embodiment of the present application, and Figure b in Figure 17 shows a schematic diagram of the interface in the insertion and extraction direction of the gold finger connector. Combining Figure a and Figure b in

[0084] Refer to Figure 17 Figure b in

[0085] , the first elastic sheet module 220 includes a plurality of first elastic sheets 221 distributed along the first direction. The first end of the first elastic sheet 221 is used to connect to the circuit board. For example, when the interface 200 is installed on the circuit board of devices such as BBU, RHUB, and RRU, the first end of the above-mentioned first elastic sheet 221 can be soldered to the circuit board. The second end of the first elastic sheet 221 is used to abut against the gold finger connector. For example, when the gold finger connector of the radio frequency transmission optical module is inserted into the interface 200, the second end of the first elastic sheet 221 abuts against the signal terminal of the gold finger connector. The second elastic sheet module 230 includes a plurality of second elastic sheets 231 distributed along the first direction. The first end of the second elastic sheet 231 is used to connect to the circuit board, and the second end of the second elastic sheet 231 is used to abut against the gold finger connector.In a possible implementation, since signal terminals are provided on both the upper and lower surfaces of the gold finger connector of the radio frequency transmission optical module, the interface 200 provided in the embodiment of the present application is also correspondingly provided with a plurality of elastic sheet modules. For example, the interface 200 includes a first elastic sheet module 220 and a second elastic sheet module 230 located in the upper part of the accommodation cavity 211, which are used to abut against the signal terminals on the upper surface of the gold finger connector; the interface 200 further includes a third elastic sheet module 250 and a fourth elastic sheet module 260 located in the lower part of the accommodation cavity 211, and the third elastic sheet module 250 and the fourth elastic sheet module 260 are used to abut against the signal terminals on the lower surface of the gold finger connector. Inside the accommodation cavity 211, the first elastic sheet module 220 is opposite to the third elastic sheet module 250, and the second elastic sheet module 230 and the fourth elastic sheet module 260 are opposite to each other. The isolation rib 240 isolates the first elastic sheet module 220 and the third elastic sheet module 250 in the first chamber 211A, and isolates the second elastic sheet module 230 and the fourth elastic sheet module 260 in the second chamber 211B. The functional definitions of the respective elastic sheets in the above elastic sheet modules can be referred to Figure 5 , Figure 6 and the corresponding examples, which will not be elaborated in the embodiment of the present application.

[0086] Please refer to Figure 18 , Figure 18 which shows a schematic diagram of the cooperation between the gold finger connector 100 and the interface 200 provided in the embodiment of the present application. When the gold finger connector is adaptively connected to the interface 200, the isolation rib 240 will be received in the receiving groove 140 of the gold finger connector 100. In the foregoing example, the width of the receiving groove can be 1 mm. Therefore, the width of the isolation rib 240 needs to be less than the width of the receiving groove. For example, the width of the isolation rib 240 can be 0.9 mm. A metal elastic sheet (not marked in the figure) can be provided on the surface of the isolation rib 240, and the metal elastic sheet can be used to connect to the grounding end of the circuit board. In this way, when the gold finger connector of the radio frequency transmission optical module is inserted into the interface 200, the metal elastic sheet on the surface of the isolation rib 240 can abut against the metal layer in the receiving groove of the gold finger connector to provide grounding for the gold finger connector.

[0087] Since the size of the gold finger connector of the radio frequency transmission optical module provided in the embodiment of the present application is widened, correspondingly, the size of the accommodation cavity 211 of the interface 200 also needs to be adjusted accordingly. The width of the accommodation cavity 211 in the first direction is greater than the width of the substrate 110 of the gold finger connector 100 in the foregoing example to ensure that the gold finger connector 100 can be inserted into the interface 200. Here, the first direction is the direction perpendicular to the surface of the substrate of the gold finger connector and the insertion and extraction direction of the gold finger connector.

[0088] For example, in the above example, if the width of the gold finger connector is 10.03 mm, the width of the receiving cavity 211 of the interface 200 provided by the embodiment of the present application can be 10.15 mm.

[0089] In a possible implementation, with reference to Figure 8 and Figure 19 , the substrate 110 of the gold finger connector 100 includes a first protrusion 112. In this case, the receiving cavity 211 of the interface 200 includes opposite first sidewall 213 and second sidewall 214. A first groove 2131 is formed on the first sidewall 213. When the gold finger connector 100 of the radio frequency transmission optical module is inserted into the interface 200, with reference to Figure 19 , when the gold finger connector 100 is cooperatively connected with the interface 200, the first protrusion 112 is received in the first groove 2131.

[0090] In another possible implementation, please refer to Figure 14 and Figure 20 , the substrate 110 of the gold finger connector 100 includes a first protrusion 112 and a second protrusion 113. The first protrusion 112 and the second protrusion 113 are oppositely arranged. In this case, the receiving cavity 211 of the interface 200 includes opposite first sidewall 213 and second sidewall 214. A first groove 2131 is formed on the first sidewall 213, and a second groove 2141 is formed on the second sidewall 214. When the gold finger connector 100 of the radio frequency transmission optical module is inserted into the interface 200, with reference to Figure 20 , when the gold finger connector 100 is cooperatively connected with the interface 200, the first protrusion 112 is received in the first groove 2131, and the second protrusion 113 is received in the second groove 2141.

[0091] Exemplarily, the thicknesses of the first protrusion 112 and the second protrusion 113 of the gold finger connector 100 can be the same as the thickness of the substrate body 111. In this case, the size of the first groove 2131 for receiving the first protrusion 112 can be the same as the size of the receiving cavity for receiving the substrate body 111, and the size of the second groove 2141 for receiving the second protrusion 113 can be the same as the size of the receiving cavity for receiving the substrate body 111. Here, the size can be regarded as the height of the first groove 2131, the second groove 2141, and the receiving cavity 211. Thus, the first groove 2131 can be formed in the interface 200 by making the first sidewall 213 thinner. Similarly, the second groove 2141 can be formed by making the second sidewall 214 thinner as a whole.

[0092] In a possible implementation, the thicknesses of the first protrusion 112 and the second protrusion 113 are different. Correspondingly, the sizes of the first groove 2131 and the second groove 2141 are also different. The first groove 2131 is used to match the first protrusion 112, and the second groove 2141 is used to match the second protrusion 113. In this way, the corresponding relationship can be distinguished according to the different thicknesses of the first protrusion 112 and the second protrusion 113 and the inconsistent sizes of the first groove 2131 and the second groove 2141. For example, assume that the thickness of the first protrusion 112 is greater than that of the second protrusion 113, and the size of the first groove 2131 is greater than that of the second groove 2141. In this case, only when the first protrusion 112 is received in the first groove 2131 and the second protrusion 113 is received in the second groove 2141, the gold finger connector 100 can be inserted into the interface 200.

[0093] The embodiments of the present application improve the structure of the gold finger connector of the radio frequency transmission optical module and make corresponding improvements to the interface corresponding to the radio frequency transmission optical module. Combining Figure 21 , the gold finger connector 100 of the radio frequency transmission optical module provided by the embodiments of the present application matches the interface 200, and the gold finger connector of the digital optical module matches the interface of the digital optical module. When the gold finger connector 100 of the radio frequency transmission optical module provided by the embodiments of the present application is misinserted into the interface of the digital optical module, since the gold finger connector is provided with the first protrusion and / or the second protrusion and has a larger size, it will prevent the gold finger connector from being inserted into the interface of the digital optical module, thus avoiding errors. When the gold finger connector of the digital optical module is misinserted into the interface 200 provided by the embodiments of the present application, since the interface 200 is provided with isolation ribs, it will block the insertion of the gold finger connector of the digital optical module.

[0094] The solution provided by the embodiments of the present application, without changing the overall module size, through the structural design and cooperation of the gold finger connector and the interface, realizes the anti-misinsertion of the digital optical module and the analog optical module at low cost, playing a role of physical anti-fooling. In addition to the sizes provided by the embodiments of the present application, the sizes of the above-mentioned gold finger connector and interface can also be adjusted accordingly.

[0095] The embodiments of the present application also provide a communication device. The communication device includes a circuit board and the interface provided by the above embodiments. The interface can be installed on the circuit board and is used to connect to the gold finger connector of the radio frequency transmission optical module.

[0096] An embodiment of the present application further provides a communication system. The communication system includes a first communication device, a second communication device, and a transmission line. The transmission line can be an optical fiber. The first end of the transmission line is connected to the first communication device, and the second end of the transmission line is connected to the second communication device. Exemplarily, a first radio frequency transmission optical module is provided at the first end of the transmission line, and a second radio frequency transmission optical module is provided at the second end of the transmission line. The first radio frequency transmission optical module is connected to the first interface of the first communication device, and the second radio frequency transmission optical module is connected to the second interface of the second communication device. Signals are transmitted between the first communication device and the second communication device through the optical fiber. The first radio frequency transmission optical module and the second radio frequency transmission optical module are the radio frequency transmission optical modules provided by the examples described above in the embodiments of the present application. Figures 8 to 16 The first interface and the second interface can be the interfaces provided by the examples described above. Figure 17 or Figure 18 as shown.

[0097] As described above, the above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A radio frequency transmission optical module, characterized in that, the radio frequency transmission optical module includes a housing and a gold finger connector disposed within the housing, and the gold finger connector is used for connecting to an interface; the gold finger connector includes a substrate, the substrate includes a substrate body and a first protrusion, the substrate body includes a first side surface, and the first protrusion is connected to the first side surface.

2. The radio frequency transmission optical module according to claim 1, characterized in that, the substrate further includes a second protrusion, the substrate body includes a second side surface opposite to the first side surface, and the second protrusion is connected to the second side surface.

3. The radio frequency transmission optical module according to claim 2, characterized in that, the lengths of the first protrusion and the second protrusion in the insertion and extraction direction of the gold finger connector are less than or equal to the length of the substrate body in the insertion and extraction direction of the gold finger connector.

4. The radio frequency transmission optical module according to claim 2, characterized in that, the thicknesses of the first protrusion and the second protrusion are less than or equal to the thickness of the body.

5. The radio frequency transmission optical module according to claim 4, characterized in that, the thicknesses of the first protrusion and the second protrusion are different.

6. The radio frequency transmission optical module according to any one of claims 2 to 4, characterized in that, the gold finger connector includes a first gold finger module and a second gold finger module; the substrate body includes a first surface, the first gold finger module and the second gold finger module are distributed on the first surface in a first direction, and the first direction is a direction perpendicular to the insertion and extraction direction of the substrate surface and the gold finger connector; the first gold finger module includes a plurality of signal terminals distributed along the first direction, and the second gold finger module includes a plurality of signal terminals distributed along the first direction.

7. The radio frequency transmission optical module according to claim 6, characterized in that, the substrate body is provided with a receiving groove, and the first gold finger module and the second gold finger module are distributed on both sides of the receiving groove.

8. The radio frequency transmission optical module according to claim 7, characterized in that, a metal layer is provided on the inner wall of the receiving groove, and the metal layer is connected to the ground terminal of the radio frequency transmission optical module.

9. The radio frequency transmission optical module according to any one of claims 6 to 8, characterized in that, the cross-sectional width of the substrate in the first direction is 9.3 mm to 12 mm, and the first direction is a direction perpendicular to the insertion and extraction direction of the substrate surface and the gold finger connector.

10. The radio frequency transmission optical module according to claim 9, characterized in that, the width of the first protrusion in the first direction is 0.1 mm to 1.5 mm; the width of the second protrusion in the first direction is 0.1 mm to 1.5 mm.

11. The radio frequency transmission optical module according to any one of claims 2 to 9, characterized in that, the substrate body, the first protrusion and the second protrusion are integrally formed.

12. An interface, characterized in that, The interface is used to connect with the gold finger connector of the radio frequency transmission optical module according to any one of claims 1 to 11. The interface includes a housing, and the housing forms a receiving cavity. The receiving cavity includes a first side wall, and a first groove is provided on the first side wall. When the gold finger connector is connected to the interface in a mating manner, the first protruding portion of the gold finger connector is received in the first groove.

13. The interface according to claim 12, wherein, the receiving cavity includes a first side wall and a second side wall that are opposite to each other, and a second groove is provided on the second side wall. When the gold finger connector is connected to the interface in a mating manner, the second protruding portion of the gold finger connector is received in the second groove.

14. The interface according to claim 12 or 13, wherein, the interface further includes a first elastic sheet module, a second elastic sheet module and a separation rib. The first elastic sheet module, the second elastic sheet module and the separation rib are arranged in the receiving cavity. Among them, the separation rib is arranged between the first elastic sheet module and the second elastic sheet module, and the separation rib separates the first elastic sheet module and the second elastic sheet module in different chambers of the receiving cavity. When the gold finger connector is connected to the interface in a mating manner, the separation rib is received in the receiving groove of the gold finger connector; the first elastic sheet module includes a plurality of first elastic sheets distributed in a first direction. The first end of the first elastic sheet is used to connect with a circuit board, and the second end of the first elastic sheet is used to abut against the gold finger connector; the second elastic sheet module includes a plurality of second elastic sheets distributed in a first direction. The first end of the second elastic sheet is used to connect with the circuit board, and the second end of the second elastic sheet is used to abut against the gold finger connector.

15. The interface according to claim 14, wherein, a metal elastic sheet is provided on the surface of the separation rib.

16. A connector assembly, wherein, it includes a gold finger connector and an interface. The gold finger connector includes a substrate, and the substrate includes a substrate body and a first protruding portion. The substrate body includes a first side surface, and the first protruding portion is connected to the first side surface; the interface includes a housing, and the housing forms a receiving cavity. The receiving cavity includes a first side wall, and a first groove is provided on the first side wall. When the gold finger connector and the interface are connected to each other in a mating manner, the first protruding portion is received in the first groove.

17. The connector assembly according to claim 16, wherein, the substrate body includes a second side surface opposite to the first side surface, and the substrate further includes a second protruding portion, and the second protruding portion is connected to the second side surface; the receiving cavity of the housing further includes a second side wall opposite to the first side wall, and a second groove is provided on the second side wall. When the gold finger connector and the interface are connected to each other in a mating manner, the second protruding portion is received in the second groove.

18. The connector assembly according to claim 17, wherein, The gold finger connector includes a first gold finger module and a second gold finger module; the substrate body includes a first surface, and the first gold finger module and the second gold finger module are distributed along a first direction on the first surface; the first gold finger module includes a plurality of signal terminals distributed along the first direction, and the second gold finger module includes a plurality of signal terminals distributed along the first direction; The interface further includes a first elastic sheet module, a second elastic sheet module and an isolation rib. The first elastic sheet module, the second elastic sheet module and the isolation rib are arranged in the accommodation cavity. Among them, the isolation rib is arranged between the first elastic sheet module and the second elastic sheet module, and the isolation rib separates the first elastic sheet module and the second elastic sheet module in different chambers of the accommodation cavity; The first elastic sheet module includes a plurality of first elastic sheets distributed along a first direction. The first end of the first elastic sheet is used to connect with the circuit board. When the gold finger connector is connected with the interface in a mating manner, the second end of the first elastic sheet abuts against the first gold finger module; The second elastic sheet module includes a plurality of second elastic sheets distributed along a first direction. The first end of the second elastic sheet is used to connect with the circuit board. When the gold finger connector is connected with the interface in a mating manner, the second end of the second elastic sheet abuts against the second gold finger module.

19. The connector assembly according to claim 18, wherein, The substrate body is provided with a receiving groove. When the gold finger connector is connected with the interface in a mating manner, the isolation rib is received in the receiving groove.

20. The connector assembly according to claim 19, wherein, A metal elastic sheet is arranged on the surface of the isolation rib, and a metal layer is arranged on the inner wall of the receiving groove. When the isolation rib is received in the receiving groove, the metal elastic sheet abuts against the metal layer.

21. The connector assembly according to any one of claims 18 to 19, wherein, The cross-sectional width of the substrate in the first direction is 9.3 millimeters to 12 millimeters.

22. The connector assembly according to claim 21, wherein, The width of the first protrusion in the first direction is 0.1 millimeter to 1.5 millimeters; the width of the second protrusion in the first direction is 0.1 millimeter to 1.5 millimeters.

23. A communication device, wherein, The communication device includes a circuit board and an interface according to any one of claims 12 to 15, and the interface is arranged on the circuit board.

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