Signal communication terminal and signal communication system

Abstract

The present invention discloses a signal communication terminal and a signal communication system, wherein the signal communication terminal comprises at least one group of signal enhancement branches and a routing circuit, wherein the routing circuit is respectively connected to each signal enhancement branch. The signal enhancement branch comprises a first antenna, a second antenna, a first switching circuit, a second switching circuit and a first signal processing circuit: the first switching circuit is respectively connected to the first antenna and the first signal processing circuit; the second switching circuit is respectively connected to the first signal processing circuit and the routing circuit; the first signal processing circuit is also connected to the second antenna, so as to solve the technical problem in the prior art that when the mobile signal is weak, the network speed of the broadband network after the conversion of the device from the mobile network to the broadband network will also become very slow.

Description

Technical Field

[0001] The invention relates to a signal communication terminal and a signal communication system, belonging to the technical field of communications. Background Art

[0002] In the prior art, there is a device on the market that can convert 3G, 4G, 5G and other mobile networks into broadband networks (such as WIFI hotspots or network port signals), usually USB Dongle, 3G / 4G network card, MIFI, portable WIFI, portable WIFI, CPE, 4G router and other products. These products can provide WIFI hotspots or network signals for mobile phones, tablets or computers and other terminal devices without connecting to broadband networks. Usually, such devices have a mobile network baseband first control circuit (including but not limited to GSM, EDGE, CDMA, WCDMA, 4G LTE, 5G and other network standards), baseband first control circuit, RF transceiver, storage chip, filter, duplexer, RF switch, WIFI chip or network port chip, SIM card and other parts, mobile network antenna, WIFI antenna, network port; the basic principle is to receive the base station signal through the mobile network antenna, and then pass the signal through the RF switch, duplexer, filter to the RF transceiver for processing, and send the processed signal to the baseband first control circuit to convert it into data and send it to the WIFI chip or network port chip. The WIFI chip or network port chip converts the data of the baseband chip into a 2.4GHz or 5GHz WIFI hotspot wireless signal and transmits it through the WIFI antenna. The coverage range of the WIFI antenna The terminal devices inside can use the signal of the hotspot. At the same time, the WIFI chip or network port chip converts the baseband data into a network port signal through the network port conversion chip and sends it to the wired network interface. The terminal device can access the Internet through the network cable connected to the device network port; conversely, the terminal device's priority network data or wireless WIFI signal also enters the network port and WIFI antenna, and the data and signals of the network port and WIFI antenna are sent to the WIFI chip or network port chip. The WIFI chip or network port chip processes the signal and data and sends it to the baseband chip. The baseband chip processes the data and sends it to the RF transceiver. After passing through filters, duplexers, RF switches and other devices, the signal is transmitted to the base station through the mobile network antenna.

[0003] Usually, devices that convert mobile networks to broadband networks can only work better when the mobile network signal is good. When the mobile signal is weak, the speed of the broadband network after the conversion will become very slow. When the mobile signal is very weak, it will not work at all. Summary of the invention

[0004] In view of the above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide a signal communication terminal and a signal communication system to solve the technical problem in the prior art that when the mobile signal is weak, the network speed of the broadband network after the conversion of the mobile network to the broadband network device will also become very slow.

[0005] In order to achieve the above object, the present invention provides a signal communication terminal, which includes at least one group of signal enhancement branches and a routing circuit:

[0006] The routing circuit is connected to each of the signal enhancement branches respectively, and is used to receive an uplink signal and send a downlink signal; and is used to output a corresponding first switching signal and a second switching signal according to the downlink signal;

[0007] The signal enhancement branch includes a first antenna, a second antenna, a first switching circuit, a second switching circuit and a first signal processing circuit:

[0008] The first switching circuit is connected to the first antenna and the first signal processing circuit respectively; the second switching circuit is connected to the first signal processing circuit and the routing circuit respectively; the first signal processing circuit is also connected to the second antenna;

[0009] The first antenna is used to receive a first downlink signal and send a first uplink signal;

[0010] The second antenna is used to send a first downlink signal and receive a first uplink signal;

[0011] The first switching circuit is used to switch the connection end according to the first switching signal;

[0012] The second switching circuit is used to switch the connection end according to the second switching signal to work together with the first switching circuit to conduct the path between the first switching circuit, the first signal processing circuit and the second switching circuit when the strength of the first downlink signal is lower than the preset first signal strength, and / or to conduct the path between the first switching circuit, the first signal processing circuit and the second antenna to output the first downlink signal after conversion and amplification processing and / or the first uplink signal after conversion and amplification processing; or

[0013] When the strength of the first downlink signal is greater than or equal to a preset first signal strength, the path between the first switching circuit and the second switching circuit is turned on to directly output the first downlink signal and / or the first uplink signal.

[0014] In order to achieve the above object, the present invention also proposes a signal communication system, the signal communication system base station, mobile terminal, routing terminal and the signal communication terminal as described above;

[0015] The signal communication system base station communicates with the first antenna of the signal communication terminal; the mobile terminal communicates with the second antenna; and the routing terminal communicates with the routing circuit.

[0016] The present invention receives a first downlink signal and sends a first uplink signal through the first antenna; the second antenna sends the first downlink signal and receives the first uplink signal; the second switching circuit works together with the first switching circuit, and when the strength of the first downlink signal is lower than the preset first signal strength, the path between the first switching circuit, the first signal processing circuit and the second switching circuit is turned on, and / or the path between the first switching circuit, the first signal processing circuit and the second antenna is turned on, so as to output the first downlink signal after conversion and amplification and / or the first uplink signal after conversion and amplification; or, when the strength of the first downlink signal is greater than or equal to the preset first signal strength, the path between the first switching circuit and the second switching circuit is turned on, so as to directly output the first downlink signal and / or the first uplink signal; when the strength of the downlink signal is lower than the preset first signal strength, the signal processing circuit of the above scheme converts and amplifies the first downlink signal and the first uplink signal, so as to conveniently and quickly provide the mobile device connected to the routing circuit or the mobile device connected to the second antenna with the enhanced signal. The technical problem that the network speed of the broadband network after the device converts from the mobile network to the broadband network will also become very slow when the mobile signal is weak in the prior art is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of a module of a signal communication terminal in one embodiment.

[0018] Figure 2 FIG. 4 is a circuit diagram of a signal communication terminal in an embodiment.

[0019] Figure 3 FIG. 4 is a circuit diagram of a signal communication terminal in an embodiment.

[0020] Figure 4 Schematic diagram of a module of a signal communication terminal in one embodiment.

[0021] Figure 5 FIG. 4 is a circuit diagram of a signal communication terminal in an embodiment.

[0022] Figure 6 FIG. 4 is a circuit diagram of a signal communication terminal in an embodiment.

[0023] Figure 7 FIG. 4 is a circuit diagram of a signal communication terminal in an embodiment. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of this application.

[0025] It should be noted that when an element is referred to as being "fixed on" or "set on" another component, it can be directly on the other component or indirectly set on the other component; when a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component.

[0026] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" and "several" mean two or more, unless otherwise clearly and specifically defined.

[0028] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.

[0029] In order to solve the technical problem of inaccurate self-excitation determination in the prior art, the present invention provides a signal communication terminal and a signal communication system.

[0030] In one embodiment, if Figure 1As shown, the signal communication terminal includes at least one group of signal enhancement branches and a routing circuit 50: the routing circuit 50 is respectively connected to each signal enhancement branch, and is used to receive uplink signals and send downlink signals; and is used to output corresponding first switching signals and second switching signals according to the downlink signals; the signal enhancement branch includes a first antenna 10, a second antenna 60, a first switching circuit 20, a second switching circuit 40 and a first signal processing circuit 30: the first switching circuit 20 is respectively connected to the first antenna 10 and the first signal processing circuit 30; the second switching circuit 40 is respectively connected to the first signal processing circuit 30 and the routing circuit 50; the first signal processing circuit 30 is also connected to the second antenna 60.

[0031] Among them, it is convenient and quick to provide enhanced signals to devices such as MIFI connected to the routing circuit 50 or the second antenna 60, thereby solving the technical problem in the prior art that when the mobile signal is weak, the broadband network speed after the conversion of the mobile network to the broadband network device will also become very slow.

[0032] In the case of weak wireless mobile signals, end consumers can choose wireless signal boosters to amplify the signals, usually repeaters, full-cell phones, mobile phone signal amplifiers, etc. These signal boosters are usually installed in home, office, car, shopping mall, subway, mountainous areas and other application scenarios. As long as there is a weak or even no mobile signal, you can consider using such signal boosters to amplify the signal. Usually, such signal boosters have components such as duplexers, analog or digital filters, amplifiers, detectors, controllers, RF cables and antennas. The basic principle is to receive the base station signal through the BS (base station) end antenna and enter the first downlink branch for amplification and then transmit it through the MS (mobile station) end antenna to cover the weak signal area; the MS end antenna receives the mobile phone signal in the weak signal area and enters the uplink branch for amplification and other processing before transmitting it to the base station through the BS end antenna.

[0033] General signal boosters have components such as duplexers, analog or digital filters, amplifiers, detectors, controllers, RF cables, antennas, etc., which make them larger in size, complex in circuits, and high in cost. They are not suitable for providing signals for devices that convert mobile networks to broadband networks.

[0034] In the solution of the present application, the signal enhancement circuit, namely the first signal processing circuit 30, is directly added to the routing device, and a first antenna 10, a second antenna 60, a first switching circuit 20 and a second switching circuit 40 are provided to assist in realizing its functions. Thus, the antenna of the routing device and the routing circuit 50 can be directly used to realize part of the functions of the signal enhancer, thereby achieving the effects of signal amplification and size reduction.

[0035] Further effects: providing WIFI hotspots or broadband networks in various scenarios where the signal is strong or weak, or even no signal can be found; when the signal is strong, the signal enhancement function of the first signal processing circuit 30 can also be turned off to reduce power consumption, and the signal enhancer can be bypassed to directly allow the mobile network to the broadband network device to receive external signals, so that the signal enhancer can completely avoid interference with the routing circuit 50 and the base station in a strong signal environment.

[0036] Furthermore, a second antenna 60 is provided to extract part of the signal from the first signal processing circuit 30 , so that when the first signal processing circuit 30 flowing to the routing circuit 50 self-excites due to improper installation of the device, the signal can be transmitted through the second antenna 60 .

[0037] Optionally, the circuit connection scheme of the above embodiment can be implemented with reference to the following connection relationship: Figure 1 As shown, the first signal processing circuit 30 includes a first end 1, a second end 2 and a third end 3, the first switching circuit 20 has a first end 1, a second end 2 and a third end 3, the second switching circuit 40 has a first end 1, a second end 2 and a third end 3, the routing circuit 50 has a first end 1, the first end 1 of the first signal processing circuit 30 is connected to the first end 1 of the first switching circuit 20, the second end 2 of the first signal processing circuit 30 is connected to the first end 1 of the second switching circuit 40, and the third end 3 of the first signal processing circuit 30 is connected to the second antenna 60; the second end 2 of the first switching circuit 20 is connected to the second end 2 of the second switching circuit 40, and the third end 3 of the first switching circuit 20 is connected to the first antenna 10; the third end 3 of the second switching circuit 40 is connected to the first end 1 of the routing circuit 50.

[0038] Among them, the first switching circuit 20 conducts the corresponding path according to the first switching signal, and the second antenna switching circuit 40 conducts the corresponding path according to the first switching signal. Specifically, when the strength of the downlink signal is greater than or equal to the first preset signal strength, the path between the third end 3 and the second end 2 of the first switching circuit 20 is conducted, and when the strength of the downlink signal is less than the first preset signal strength, the first switching circuit 20 conducts the path between the first end 1 and the third end 3 of the first switching circuit 20; when the strength of the downlink signal is greater than or equal to the second preset signal strength, the second antenna switching circuit 40 conducts the path between the third end 3 and the second end 2 of the second antenna switching circuit 40, and when the strength of the downlink signal is less than the second preset signal strength, the second switching circuit 40 conducts the path between the first end 1 and the third end 3 of the second antenna switching circuit 40. Through the above process, the switching between various paths can be flexibly realized. The control process at this time can be realized by the routing circuit 50, or by a control circuit set separately.

[0039] In one embodiment, referring to the attached Figure 4 As shown, the first switching circuit 20 further includes a controlled end, and the second switching circuit 40 further includes a controlled end; the controlled end of the first switching circuit 20 and the controlled end of the second switching circuit 40 are both connected to the routing circuit 50 .

[0040] Among them, the routing circuit 50 has the function of a control circuit at this time, and can realize the function of outputting corresponding first switching signals and second switching signals according to the downlink signal, so that the connection ends of the first switching circuit 20 and the second switching circuit 40 can be switched according to the strength of the downlink signal.

[0041] It should be noted that the routing circuit 50 specifically refers to a device that can convert 3G, 4G, 5G and other mobile network signals provided by base stations into WIFI broadband network (wireless), wired broadband network signals or WIFI + wired broadband network signals, such as MIFI or CPE. The routing circuit 50 requires one or more mobile network signal input and output ports, usually one or more WIFI antenna ports, or one or more wired broadband network interfaces, or one or more WIFI antenna ports + one or more wired broadband network interfaces.

[0042] In one embodiment, referring to the attached Figure 4 As shown, the signal communication terminal also includes a first control circuit 60, which is electrically connected to the first antenna 10, the second antenna 60 and at least one circuit in the routing circuit 50; the controlled end of the first switching circuit 20 and the controlled end of the second switching circuit 40 are both connected to the first control circuit 60.

[0043] Among them, the first control circuit 60 is used to obtain at least one first downlink signal from the first antenna 10, the second antenna 60 and the routing circuit 50, and when the strength of any first downlink signal is lower than the preset first signal strength, the path between the first switching circuit 20, the first signal processing circuit 30 and the second switching circuit 40 is turned on, and / or, the path between the first switching circuit 20, the first signal processing circuit 30 and the second antenna 60 is turned on to output the first downlink signal after conversion and amplification and / or the first uplink signal after conversion and amplification. Through the above control process, when the strength of any downlink signal is low, the signal can be cut into the amplification branch of the first signal processing circuit 30 to achieve the output of the amplified downlink signal and the uplink signal. Thereby, the network speed of the broadband network after the device converts from the mobile network to the broadband network when the mobile signal is weak can be improved. That is, the strength of the downlink signal output by the routing circuit 50 and the second antenna 60 is improved, and the strength of the uplink signal output by the first antenna 10 can be simultaneously improved.

[0044] In one embodiment, refer to the attached Figure 3 , 5As shown in Figures 6 and 7, the first switching circuit 20 includes a switching switch 1, a switching switch 2 and a power divider 3, the first connection end of the switching switch 1 is the third end 3 of the first switching circuit 20, the second connection end of the switching switch 1 is connected to the first connection end of the switching switch 2, and the third connection end of the switching switch 1 is connected to the first end 1 of the power divider 3; the second connection end of the switching switch 2 is the first end 1 of the first switching circuit 20, and the third connection end of the switching switch 2 is connected to the second end 2 of the power divider 3; the third end 3 of the power divider 3 is the second end 2 of the first switching circuit 20, the controlled end of the switching switch 1 is connected to the controlled end of the switching switch 2, and the connection node is the controlled end of the first switching circuit 20.

[0045] The power divider 3 can divide the signal connected by the switch into multiple parts, and can change the signal strength from the first switching circuit 20 to the second switching circuit 40 as needed, and can also change the signal strength output to the first signal processing circuit 30. Thus, intelligence is achieved, so that when the required signal strength is slightly increased, the signal can be directly passed through the first switching circuit 20 to the second switching circuit 40 as much as possible, and the interference that may be generated by the first signal processing circuit 30 is further reduced.

[0046] Optionally, refer to Figure 2 , 3 as well as Figure 5-Figure 7 As shown, the first switching circuit 20 and the second antenna switching circuit 40 can be implemented by a single-pole double-throw RF switch, wherein the single-pole double-throw RF switch can flexibly switch the conduction relationship according to the type and strength of the uplink and downlink signals. It should be noted that the routing signal and the mobile signal are both uplink signals.

[0047] Optionally, refer to Figure 2 , 3 As shown in Figures 5 and 6, the first signal processing circuit 30 includes N first uplink branches 301, N first downlink branches 302, N second uplink branches 303, N second downlink branches 304, N first duplex branches 305, N second duplex branches 306, and N third duplex branches 307;

[0048] The first duplex branch 305 has an input and output end, an uplink signal input end and a downlink signal output end; the second duplex branch 306 has an input and output end, an uplink signal output end and a downlink signal input end; the third duplex branch 307 has an input and output end, an uplink signal output end and a downlink signal input end; the first downlink branch 302 includes an input end, a first output end and a second output end; the first uplink branch 301 includes a first input end, a second input end and an output end.

[0049] refer to Figure 2 as well as Figure 7As shown, when N=1, the downlink signal output end of the first duplex branch 305 is connected to the input end of the first downlink branch 302, the uplink signal input end of the first duplex branch 305 is connected to the output end of the first uplink branch 301, and the input and output ends of the first duplex branch 305 are the first end 1 of the first signal processing circuit 30; the downlink signal input end of the second duplex branch 306 is connected to the first output end of the first downlink branch 302; the uplink signal output end of the second duplex branch 306 is connected to the first input end of the first uplink branch 301, and the second duplex branch 306 is connected to the first input end of the first uplink branch 301. 06 is the third end 3 of the first signal processing circuit 30; the input end of the second uplink branch 303 is connected to the uplink signal output end of the third duplex branch 307, and the output end of the second uplink branch 303 is connected to the second input end of the first uplink branch 301; the input end of the second downlink branch 304 is connected to the second output end of the first downlink branch 302, and the output end of the second downlink branch 304 is connected to the downlink signal input end of the third duplex branch 307; the input and output ends of the third duplex branch 307 are the second end 2 of the first signal processing circuit 30.

[0050] refer to Figure 3 as well as Figure 6As shown, when N is an integer greater than or equal to 2, the first signal processing circuit 30 further includes a first combining branch 308, a second combining branch 309 and a third combining branch 310, the downlink signal output end of the Nth first duplex branch 305 is connected to the input end of the Nth first downlink branch 302, the uplink signal input end of the Nth first duplex branch 305 is connected to the output end of the Nth first uplink branch 301, the input and output ends of the N first duplex branches 305 are both connected to the first combining branch 308, and the signal exchange end of the first combining branch 308 is the first end 1 of the first signal processing circuit 30; the downlink signal input end of the Nth second duplex branch 306 is connected to the first output end of the Nth first downlink branch 302; the uplink signal output end of the Nth second duplex branch 306 is connected to the first input end of the Nth first uplink branch 301 The input and output ends of the N second duplex branches 306 are connected to the second combining branch 309, and the signal exchange end of the second combining branch 309 is the third end 3 of the first signal processing circuit 30; the input end of the Nth second uplink branch 303 is connected to the uplink signal output end of the Nth third duplex branch 307, and the output end of the Nth second uplink branch 303 is connected to the second input end of the Nth first uplink branch 301; the input end of the Nth second downlink branch 304 is connected to the second output end of the Nth first downlink branch 302, and the output end of the Nth second downlink branch 304 is connected to the downlink signal input end of the Nth third duplex branch 307; the input and output ends of the N third duplex branches 307 are connected to the third combining branch 310, and the signal exchange end of the third combining branch 310 is the second end 2 of the first signal processing circuit 30.

[0051] Among them, the first combining circuit combines the output frequency bands of the N first uplink branches 301 of the first signal processing circuit 30 into an uplink signal and outputs it to the first antenna 10, or splits the downlink signal input by the first antenna 10 and inputs them respectively to the N first downlink branches 302 of the first signal processing circuit 30; the second combining circuit combines the output frequency bands of the N first downlink branches 302 of the first signal processing circuit 30 into a downlink signal and outputs it to the second antenna 60, or splits the uplink signal input by the second antenna 60 and inputs them respectively to the N first uplink branches 301 of the first signal processing circuit 30; the third combining circuit combines the output frequency bands of the N second downlink branches 304 of the first signal processing circuit 30 into a downlink signal and outputs it to the routing circuit 50, or splits the uplink signal input by the routing circuit 50 and inputs them respectively to the N second uplink branches 303 of the first signal processing circuit 30.

[0052] In the above circuit, when the gain of the upstream branch and the downstream branch needs to be higher, the number of amplifiers in the branch can be increased as needed, and the position of the amplifier added in the branch is not restricted, but it is usually placed after the attenuator. At the same time, other devices such as filters can usually be added to the branch as needed.

[0053] Optionally, the first combining branch, the second combining branch and the third combining branch may be implemented by various combining types such as a power divider, a bridge, a dielectric combiner, a cavity combiner, a microstrip line or a stripline direct combiner, and the like.

[0054] Optionally, refer to Figure 3 , 5 As shown in , 6 and 7, the first upstream branch 301 includes an amplifier 1, a power divider 1, an attenuator 1 and an amplifier 2, the input end of the amplifier 2 is the first input end of the first upstream branch 301, and the output end of the amplifier 2 is connected to the input end of the attenuator 1; the first input end of the power divider 1 is connected to the output end of the attenuator 1, the second input end of the power divider 1 is the second input end of the first upstream branch 301, the output end of the power divider 1 is connected to the input end of the amplifier 1, and the output end of the amplifier 1 is the output end of the first upstream branch 301; the first downstream branch 302 includes an amplifier 3, a power divider 2, an attenuator 2 and an amplifier 4, the input end of the amplifier 3 is the first input end of the first downstream branch 302, and the output end of the amplifier 3 is connected to the input end of the power divider 2; the first output end of the power divider 2 is connected to the input end of the attenuator 2, and the second output end of the power divider 2 is the second output end of the first downstream branch 302; the output end of the attenuator 2 is connected to the input end of the amplifier 4; the output end of the amplifier 4 is the first output end of the first downstream branch 302.

[0055] Optionally, refer to Figure 2 As shown, the first upstream branch 301 further includes an isolator 1 , which is arranged between the power divider and the attenuator 1 .

[0056] The isolator can isolate the signals of the first uplink branch 301 and the second uplink branch 303 .

[0057] Optionally, refer to the attached Figure 2 As shown, the second uplink branch 303 includes an attenuator 3, the input end of the attenuator 3 is the input end of the second uplink branch 303, and the output end of the attenuator 3 is the output end of the second uplink branch 303;

[0058] The second downlink branch 304 includes an attenuator 4, the input end of the attenuator 4 is the input end of the second downlink branch 304, and the output end of the attenuator 4 is the output end of the second downlink branch 304; or,

[0059] The second uplink branch 303 includes an attenuator 3 and an isolator 2 . The input end of the attenuator 3 is the input end of the second uplink branch 303 , and the output end of the attenuator 3 is the output end of the second uplink branch 303 .

[0060] In one embodiment, reference Figure 2 As shown, it also includes a second control circuit and a detection branch arranged one-to-one with any first upstream branch 301, the first downstream branch 302, the second upstream branch 303 and the second downstream branch 304, the second control circuit includes a control end arranged corresponding to the number of attenuators, the detection end of the detection branch is arranged at the output end of the amplifier in any branch, the output end of each detection branch is connected to the second control circuit, and the control end of the second control circuit is connected one-to-one to the controlled end of the attenuator of the first upstream branch 301 or the first downstream branch 302 and the controlled end of the attenuator of the second downstream branch 304 or the second downstream branch 304.

[0061] The detection branch corresponding to the first uplink branch 301 is composed of detector 1, the detection branch corresponding to the first downlink branch 302 is composed of detector 2, the detection branch corresponding to the second uplink branch 303 is composed of detector 2, and the detection branch corresponding to the second downlink branch 304 is composed of detector 4.

[0062] In one embodiment, if Figure 5 As shown, the first antenna 10 is a BS downlink diversity antenna, the second antenna 60 is a BS downlink diversity antenna, the first signal processing circuit 30 includes a filter 1, an amplifier 5, a power divider 4, an attenuator 5 and a filter 2, the input end of the filter 1 is the first end 1 of the first signal processing circuit 30, and the output end of the filter 1 is connected to the input end of the amplifier 5; the input end of the power divider 4 is connected to the output end of the amplifier 5, the first output end of the power divider 4 is connected to the input end of the attenuator 5, and the second output end of the power divider 4 is the second end 2 of the first signal processing circuit 30; the output end of the attenuator 5 is connected to the input end of the filter 2, and the output end of the filter 2 is the third end 3 of the first signal processing circuit 30.

[0063] At this time, in mobile communications, the base station will use two antennas to transmit downlink signals. Usually, devices such as MIFI and mobile communication devices such as mobile phones will use receive diversity technology. These devices use a main antenna including transmission and reception, and a separate downlink reception diversity reception antenna. In a signal environment that supports diversity reception, it can provide users with better signal effects than a single main antenna. Especially in high-speed applications such as WIFI, diversity reception is more important. Therefore, this solution also provides a host + diversity reception technology. The above embodiment belongs to diversity reception. Diversity reception mainly adds a group of downlink branches. The RF parameters and control of the added downlink branches need to be consistent with the first group; if there are multiple frequency bands, each frequency band adds a group of downlink branches or adds downlink branches of some frequency bands, and uses a combiner to combine downlink branches of different frequency bands. These downlink branches share an additional first antenna 10, that is, a BS downlink diversity antenna and an additional second antenna 60, that is, an MS downlink diversity antenna; the branch architecture and control method are similar to the previous ones and will not be repeated.

[0064] In one embodiment, if Figure 6 , 7 As shown, the second antenna 60 is a MIMO antenna or a second antenna 60 (MS antenna).

[0065] Optionally, the first duplex branch 305, the second duplex branch 306, and the second duplex branch 304 may be implemented by using a duplexer or a synchronous switch. Figure 2 , 3 , 5, 6 shown in the duplexer 1, 2, 3, and Figure 7 Shown are a synchronous switch 1 and a synchronous switch 2.

[0066] It should be noted that when the gain of branch 3 needs to be higher, the number of amplifiers in the branch can be increased as needed, and the position of the amplifier added in the branch is not limited, but it is usually placed after the attenuator. At the same time, other devices such as filters can usually be added to the branch as needed. Figure 7 As shown, the branch can be realized by using a filter 1, an amplifier 5, an attenuator 5 and a filter 2 connected in sequence.

[0067] Optionally, the combining circuit may be a power divider, a bridge, a dielectric combiner, a cavity combiner, a microstrip line or a stripline direct combiner, etc. In this case, a multi-band signal processing circuit 30 may be implemented, and the combiner serves as a branch of different frequency bands.

[0068] The following combination Figure 1-Figure 7 The principle of the present invention is described:

[0069] Description of the downlink signal solution:

[0070] As 1- Figure 2 As shown, after the downlink signal of the base station is received by the first antenna 10 (BS antenna), it reaches the first switching circuit 20. When the downlink signal received by the first antenna 10 (BS antenna) is weak, the first control circuit 60 or the routing circuit 50 controls the single-pole double-throw RF switch 1 to directly connect the signal to the duplexer 1; the duplexer 1 divides the received signal into an uplink signal (UL) and a downlink signal (DL), and transmits the signal to the amplifier 3 (this position is usually a low-noise amplifier LNA to ensure a good noise figure or signal-to-noise ratio, which is used to ensure that when the signal received by the first antenna 10 (BS antenna) is very weak or the signal-to-noise ratio is very poor, the required signal can be amplified instead of the background noise);

[0071] After passing through amplifier 3, it reaches the downstream power splitter 2 / bridge (in some scenarios, there will be 2 or more amplifiers before the power splitter to ensure sufficient gain for devices such as MIFI);

[0072] The downlink power divider 2 / bridge will evenly distribute the signal into two paths, one path to the second downlink branch 304, and the other path to the remaining part of the first downlink branch 302; the power divider 2 / bridge can be replaced by other signal distribution circuits such as a coupler, as long as the distribution ratio is calculated. The first downlink branch 302 usually receives the signal of the base station. It is sufficient to distribute the signal to the routing circuit 50 and the signal to the first downlink branch 302. There is no need to isolate the signal to the routing circuit 50 and the signal to the first downlink branch 302.

[0073] The signal from the downlink power splitter 2 / bridge to the remaining first downlink branch 302 passes through the attenuator 2 and the amplifier 4 to the duplexer 2, and then to the second antenna 60 (MS antenna) to transmit the signal amplified by the first downlink branch 302; the amplified downlink signal transmitted by the second antenna 60 (MS antenna) can be provided to mobile communication terminals such as mobile phones. There may be more than one amplifier 4 between the duplexer 1 and the duplexer 2, and there may be two or more amplifiers, which are adjusted according to the gain required by the product, and the same applies to the uplink;

[0074] The downlink power divider 2 / bridge is a node allocated to the signals of MIFI and other devices, and is usually located in the middle of the first downlink branch 302 to ensure that the signal gain provided to MIFI and other devices is sufficient, so that the MIFI signal can pass through as few devices or circuits as possible, such as amplifiers, filters, controllers, etc. The more devices or circuits, such as amplifiers, filters, controllers, etc., there are in the first downlink branch 302, the more the overall RF parameters of the first downlink branch 302 will deteriorate, and the same is true for the uplink and MIFI links.

[0075] The signal of the first downstream branch 302 is detected by the detector 2, and the signal is usually detected at a certain point in the first downstream branch 302, and this point can be anywhere between the attenuator 2 and the duplexer 2. The detector 2 converts the detected signal into a signal (usually a voltage) that can be processed by the first control circuit 60. The first control circuit 60 generates a second attenuation control signal to control the attenuation value of the attenuator 2 by processing the detection signal of the detector 2, thereby realizing signal control of the first downstream branch 302, and usually controls the signal strength, interference and other parameters of the first downstream branch 302, usually to prevent the signal from being too strong or to reduce interference. The detector is usually a detection diode or a logarithmic detector, and the first control circuit 60 is usually a microcontroller such as a single-chip microcomputer, FPGA, CPU, etc., or an analog negative feedback control circuit; according to specific product needs, the amplification link may also have multiple attenuators or amplifiers or filters and other devices, but this scheme only illustrates the architecture of a common amplification link, and only extracts the necessary parts to illustrate how the amplification link is combined with the circuits of the equipment part such as MIFI;

[0076] Generally speaking, when it is detected that the signal is weak or there is no interference, the first control circuit 60 will control the attenuator 2 to release the attenuation value to the maximum; when it is detected that the signal is strong or there is interference, the first control circuit 60 will control the attenuator 2 to attenuate the gain until the signal is reduced to a normal range or the interference is eliminated or improved; because the control of the amplification link is a common control technology of the first signal circuit, it will not be repeated here.

[0077] The signal of the link part from the power splitter 2 / bridge to the MIFI and other devices passes through the attenuator 4, then to the duplexer 5, and then to the single-pole double-throw RF switch. When the downlink signal received by the first antenna 10 (BS antenna) is weak, the first control circuit 60 or the routing circuit 50 controls the single-pole double-throw RF switch here to connect the amplified downlink signal from the duplexer 5 to the routing circuit 50, and provide the amplified signal to the routing circuit 50. According to the needs of specific products, some amplifiers can also be added between the downlink power splitter 2 / bridge and the duplexer 5 to provide sufficient gain for devices or modules such as MIFI.

[0078] The downlink detector 4 detects the signal of the second downlink branch 304, and usually detects the signal at a certain point in the second downlink branch 304, and this point can be any position between the attenuator 4 and the duplexer 5. The detector 4 converts the detected signal into a signal (usually a voltage) that can be processed by the first control circuit 60. The first control circuit 60 generates a fourth attenuation control signal to control the attenuation value of the attenuator 4 by processing the signal of the detector 4, thereby realizing signal control of the second downlink branch 304, and usually controlling the signal strength, interference and other parameters of the second downlink branch 304, usually to prevent the signal from being too strong or to reduce interference. The detector is usually a detection diode or a logarithmic detector, and the signal strength parameter provided by the routing circuit 50 or the device itself can also be used as a detection value to the first control circuit 60 to control the attenuation value of the attenuator 4; the first control circuit 60 is usually a microcontroller, FPGA, CPU or other first control circuit 60 or an analog negative feedback control circuit; the first control circuit 60 can be shared with the first control circuit 60 used for the downlink amplification link, or other first control circuits 60 can be used alone; the control method is similar to the control method of the first downlink branch 302 above, but when the attenuator of the first downlink branch 302 attenuates the gain of the attenuator 2 due to interference such as self-excitation, the second downlink branch 304 of the routing circuit 50 is not affected and the attenuation value remains unchanged. This solves the problem that when the first downlink branch 302 has interference and attenuates the gain, mobile communication devices such as mobile phones may not be used well due to low gain. The routing circuit 50 can also provide WIFI hotspots such as the MIFI part to provide network services to mobile devices such as mobile phones.

[0079] At the same time, according to the needs of specific products, for example, the gain provided to the MIFI part by the second downlink branch 304 is relatively low, and there is usually no need to worry about the signal reaching the MIFI part being too strong or causing interference. The attenuator 4 and the detector 4 and the corresponding control circuit can be removed to simplify the circuit or reduce costs.

[0080] After the downlink signal of the base station is received by the first antenna 10 (BS antenna), it reaches the first switching circuit 20. When the downlink signal received by the first antenna 10 (BS antenna) is strong, the first control circuit 60 or the routing circuit 50 controls the single-pole double-throw RF switch to divide the signal into two paths through the power divider 3 / bridge: one path reaches the duplexer 1, and is amplified through the first downlink branch 302 to the second antenna 60 (MS antenna) and transmitted to mobile phones and other mobile communication devices; the other path reaches the switch in the second switching circuit 40. The switch of the second switching circuit 40 is now set to be connected to the power divider 3 / bridge and MIFI and other devices in the first switching circuit 20, so that the first antenna 10 (BS antenna) receives the signal and passes through the power divider 3 in the first switching circuit 20, then to the second switching circuit 40, and then to the routing circuit 50 MIFI and other devices or modules. Through the combined control of the first switching circuit 20 and the second switching circuit 40, it is possible to enable the first signal circuit to provide signals to MIFI and mobile communication devices such as mobile phones at the same time: when the received signal is weak, the first signal circuit can provide an enhanced signal to the routing circuit 50, or the first signal circuit can provide an enhanced signal to mobile communication devices such as mobile phones through the second antenna 60 (MS antenna); when the signal received by the first antenna 10 (BS antenna) is strong, the received signal is divided into two paths through the power divider 3 / bridge in the first switching circuit 20, one path provides the signal to the routing circuit 50 without amplification, and the other path is transmitted to the second antenna 60 (MS antenna) to mobile communication devices such as mobile phones; the advantage of this is that the routing circuit 50 can be provided with an enhanced signal. The routing circuit 50 will not receive signals that are too strong, and the routing circuit 50 can usually receive signals of more frequency bands (BAND) than the first signal circuit, and the signals received by the routing circuit 50 can avoid the influence of waveform deterioration after filtering and amplification by the amplification link of the first signal circuit; at the same time, the first signal circuit can continue to work, which is meaningful for the situation where the first signal circuit has multiple frequency bands, because devices such as the routing circuit 50 usually only use a part of the frequency band of the first signal circuit. If the routing circuit 50 does not use the signal amplified by the first signal circuit, mobile terminals and other devices such as mobile phones in the area covered by the second antenna 60 (MS antenna) will continue to use the amplified signals of certain frequency bands of the first signal circuit.

[0081] Description of the uplink signal solution:

[0082] exist Figure 2In the figure, after the uplink transmission signal of a mobile communication device such as a mobile phone is received by the second antenna 60 (MS antenna), it passes through the duplexer 2 and reaches the amplifier 2 (the amplifier after the duplexer is usually a low noise amplifier LNA to ensure a good noise coefficient or signal-to-noise ratio, which is used to ensure that the noise coefficient or signal-to-noise ratio of the signal received at the second antenna 60 (MS antenna) will not be significantly deteriorated, so as not to cause interference to the base station after being amplified by the subsequent amplification link of the LNA and then transmitted through the first antenna 10 (BS antenna)). After the amplifier 2 amplifies the uplink signal, the signal reaches the attenuator 1, passes through the isolator / circulator, and then reaches a signal distribution port of the uplink power divider / bridge;

[0083] The uplink signal of the routing circuit 50, such as MIFI, passes through the second switching circuit 40. When it is detected that the signal received by the first antenna 10 (BS antenna) is weak, the switch in the second switching circuit 40 connects the signal interface of the routing circuit 50 to the duplexer 5. The duplexer 5 transmits the uplink signal to the attenuator 3 and then to the other signal distribution port of the uplink power divider 1 / bridge after passing through the isolator 2 / circulator;

[0084] The uplink power splitter 1 / bridge combines the signal from the first uplink branch 301 (UL) and the uplink signal from the MIFI and other devices into one path, and outputs it to the amplifier 1 (amplifier 1 is usually a power amplifier PA). The amplifier 1 is used to amplify the signal to sufficient power and transmit it through the duplexer 1, the first switching circuit 20, and the first antenna 10 (BS antenna) to be received by the base station;

[0085] The detector 1 detects the uplink signal and converts it into a signal that can be processed by the first control circuit 60. The first control circuit 60 processes or analyzes the signal and generates a first attenuation control signal to control the attenuator 1 to adjust the link parameters. The specific control method and link description are the same as those of the first downlink branch 302, which will not be repeated here.

[0086] The detector 3 detects the MIFI uplink signal and provides it to the first control circuit 60 for processing to generate a third attenuation control signal, which controls the attenuator 3 to adjust the parameters of the second uplink branch 303. The specific control method and link description are the same as the previous description of the first downlink branch 302, and will not be repeated here; however, when the attenuator of the first uplink branch 301 attenuates the gain of the attenuator 1 due to interference such as self-excitation, the second uplink branch 303 is not affected and the attenuation value remains unchanged. This solves the problem that when the first signal circuit has interference attenuation and the gain is poorly used by mobile communication devices such as mobile phones due to low gain, the MIFI part can also provide WIFI hotspots to provide network services to mobile devices such as mobile phones.

[0087] It should be noted that in the case of weak signals, MIFI and other devices and mobile communication devices such as mobile phones near the second antenna 60 (MS antenna) usually transmit very strong uplink signals, which may cause the uplink amplifier output power to be too large or overloaded, and may even interfere with the base station. Therefore, the signal control circuits of the uplink and uplink MIFI link, such as detector 1, attenuator 1, detector 3, attenuator 3, etc., are usually not omitted to keep the uplink transmission signal within a reasonable range; the uplink signals of MIFI and other devices and mobile communication devices such as mobile phones near the second antenna 60 (MS antenna) may cause detector 1 and detector 3 to detect each other's signals, thereby causing mutual detection interference. Therefore, the power divider / bridge in the uplink can play a role in detection isolation. Usually, the power divider / bridge can provide about 15dB of isolation for detector 1 and detector 3. If better isolation is required, an isolation device or module such as an RF isolator or circulator can be added between the distribution port of the power divider / bridge and the detector.

[0088] In order to solve the above problems, the present invention further proposes a signal communication system, a signal communication system base station, a mobile terminal, a routing terminal and the above signal communication terminal.

[0089] The signal communication system base station communicates with the first antenna 10 of the signal communication terminal; the mobile terminal communicates with the second antenna 60; and the routing terminal communicates with the routing circuit 50.

[0090] It should be noted that, since the signal communication system of the present application includes all the steps of the above-mentioned signal communication terminal, the signal communication system can also implement all the solutions of the signal communication terminal and have the same beneficial effects, which will not be repeated here.

[0091] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A signal communication terminal, characterized in that: The signal communication terminal includes at least one set of signal enhancement branches and routing circuits: The routing circuit is connected to each of the signal enhancement branches respectively, and is used to receive an uplink signal and send a downlink signal; and is used to output a corresponding first switching signal and a second switching signal according to the downlink signal; The signal enhancement branch includes a first antenna, a second antenna, a first switching circuit, a second switching circuit and a first signal processing circuit: The first switching circuit is connected to the first antenna and the first signal processing circuit respectively; the second switching circuit is connected to the first signal processing circuit and the routing circuit respectively; the first signal processing circuit is also connected to the second antenna; The first antenna is used to receive a first downlink signal and send a first uplink signal; The second antenna is used to send a first downlink signal and receive a first uplink signal; The first switching circuit is used to switch the connection end according to the first switching signal; The second switching circuit is used to switch the connection end according to the second switching signal, so as to work together with the first switching circuit to conduct the path between the first switching circuit, the first signal processing circuit and the second switching circuit when the strength of the first downlink signal is lower than the preset first signal strength, and / or to conduct the path between the first switching circuit, the first signal processing circuit and the second antenna, so as to output the first downlink signal after conversion and amplification processing and / or the first uplink signal after conversion and amplification processing; or, When the strength of the first downlink signal is greater than or equal to a preset first signal strength, conducting a path between the first switching circuit and the second switching circuit to directly output the first downlink signal and / or the first uplink signal; The first signal processing circuit includes a first end, a second end and a third end, the first switching circuit has a first end, a second end and a third end, the second switching circuit has a first end, a second end and a third end, the routing circuit has a first end, the first signal processing circuit is connected to the first end of the first switching circuit, the second end of the first signal processing circuit is connected to the first end of the second switching circuit, and the third end of the first signal processing circuit is connected to the second antenna; the second end of the first switching circuit is connected to the second end of the second switching circuit, and the third end of the first switching circuit is connected to the first antenna; the third end of the second switching circuit is connected to the first end of the routing circuit; The first signal processing circuit includes N first uplink branches, N first downlink branches, N second uplink branches, N second downlink branches, N first duplex branches, N second duplex branches, and N third duplex branches; The first duplex branch has an input and output end, an uplink signal input end, and a downlink signal output end; the second duplex branch has an input and output end, an uplink signal output end, and a downlink signal input end; the third duplex branch has an input and output end, an uplink signal output end, and a downlink signal input end; the first downlink branch includes an input end, a first output end, and a second output end; the first uplink branch includes a first input end, a second input end, and an output end; When N=1, the downlink signal output end of the first duplex branch is connected to the input end of the first downlink branch, the uplink signal input end of the first duplex branch is connected to the output end of the first uplink branch, and the input and output ends of the first duplex branch are the first end of the first signal processing circuit; the downlink signal input end of the second duplex branch is connected to the first output end of the first downlink branch; the uplink signal output end of the second duplex branch is connected to the first input end of the first uplink branch, and the input and output ends of the second duplex branch are the third ends of the first signal processing circuit; The input end of the second uplink branch is connected to the uplink signal output end of the third duplex branch, and the output end of the second uplink branch is connected to the second input end of the first uplink branch; the input end of the second downlink branch is connected to the second output end of the first downlink branch, and the output end of the second downlink branch is connected to the downlink signal input end of the third duplex branch; the input and output ends of the third duplex branch are the second ends of the first signal processing circuit; When N is an integer greater than or equal to 2, the first signal processing circuit further includes a first combining branch, a second combining branch and a third combining branch, the downlink signal output end of the Nth first duplex branch is connected to the input end of the Nth first downlink branch, the uplink signal input end of the Nth first duplex branch is connected to the output end of the Nth first uplink branch, the input and output ends of the N first duplex branches are all connected to the first combining branch, the signal exchange end of the first combining branch is the first end of the first signal processing circuit; the downlink signal input end of the Nth second duplex branch is connected to the first output end of the Nth first downlink branch; the uplink signal output end of the Nth second duplex branch is connected to the first input end of the Nth first uplink branch, and the N The input and output ends of the Nth second duplex branch are both connected to the second combining branch, and the signal exchange end of the second combining branch is the third end of the first signal processing circuit; the input end of the Nth second uplink branch is connected to the uplink signal output end of the Nth third duplex branch, and the output end of the Nth second uplink branch is connected to the second input end of the Nth first uplink branch; the input end of the Nth second downlink branch is connected to the second output end of the Nth first downlink branch, and the output end of the Nth second downlink branch is connected to the downlink signal input end of the Nth third duplex branch; the input and output ends of the Nth third duplex branches are both connected to the third combining branch, and the signal exchange end of the third combining branch is the second end of the first signal processing circuit; The first combining branch is used to combine the N first uplink branch output frequency bands of the first signal processing circuit into an uplink signal and then output it to the first antenna, or to split the downlink signal input by the first antenna and then input it to the N first downlink branches of the first signal processing circuit respectively; The second combining branch is used to combine the N first downlink branch output frequency bands of the first signal processing circuit into a downlink signal and then output it to the second antenna, or to split the uplink signal input by the second antenna and then input it to the N first uplink branches of the first signal processing circuit respectively; The third combining branch is used to combine the N second downlink branch output frequency bands of the first signal processing circuit into a downlink signal and then output it to the routing circuit, or to split the uplink signal input by the routing circuit and then input it to the N second uplink branches of the first signal processing circuit respectively.

2. The signal communication terminal according to claim 1, characterized in that: The first switching circuit further includes a controlled end, and the second switching circuit further includes a controlled end; the controlled end of the first switching circuit and the controlled end of the second switching circuit are both connected to the routing circuit; or, The signal communication terminal further includes a first control circuit, the first control circuit being electrically connected to the first antenna, the second antenna, and at least one of the routing circuits; the controlled end of the first switching circuit and the controlled end of the second switching circuit are both connected to the first control circuit; The first control circuit is used to obtain at least one first downlink signal from the first antenna, the second antenna and the routing circuit, and when the strength of any of the first downlink signals is lower than a preset first signal strength, to turn on the path between the first switching circuit, the first signal processing circuit and the second switching circuit, and / or to turn on the path between the first switching circuit, the first signal processing circuit and the second antenna, so as to output the first downlink signal after conversion and amplification processing and / or the first uplink signal after conversion and amplification processing.

3. The signal communication terminal according to claim 1, characterized in that: The first uplink branch comprises an amplifier 1, a power divider 1, an attenuator 1 and an amplifier 2, wherein the input end of the amplifier 2 is the first input end of the first uplink branch, and the output end of the amplifier 2 is connected to the input end of the attenuator 1; the first input end of the power divider 1 is connected to the output end of the attenuator 1, the second input end of the power divider 1 is the second input end of the first uplink branch, the output end of the power divider 1 is connected to the input end of the amplifier 1, and the output end of the amplifier 1 is the output end of the first uplink branch; the first downlink branch comprises an amplifier 3, a power divider 2, an attenuator 2 and an amplifier 4, the input end of the amplifier 3 is the first input end of the first downlink branch, and the output end of the amplifier 3 is connected to the input end of the power divider 2; the first output end of the power divider 2 is connected to the input end of the attenuator 2, and the second output end of the power divider 2 is the second output end of the first downlink branch; the output end of the attenuator 2 is connected to the input end of the amplifier 4; and the output end of the amplifier 4 is the first output end of the first downlink branch.

4. The signal communication terminal according to claim 3, characterized in that: The second uplink branch comprises an attenuator 3, the input end of the attenuator 3 is the input end of the second uplink branch, and the output end of the attenuator 3 is the output end of the second uplink branch; The second downlink branch includes an attenuator 4, an input end of the attenuator 4 is an input end of the second downlink branch, and an output end of the attenuator 4 is an output end of the second downlink branch.

5. The signal communication terminal according to claim 4, characterized in that: It also includes a second control circuit and a detection branch which is arranged one-to-one with any of the first uplink branch, the first downlink branch, the second uplink branch and the second downlink branch, the second control circuit includes a control end arranged corresponding to the number of the attenuators, the detection end of the detection branch is arranged at the output end of the amplifier in any branch, the output end of each of the detection branches is connected to the second control circuit, and the control end of the second control circuit is connected one-to-one to the controlled end of the attenuator of the first uplink branch or the first downlink branch and the controlled end of the attenuator of the second downlink branch or the second downlink branch.

6. The signal communication terminal according to claim 1, characterized in that: The first switching circuit includes a switching switch 1, a switching switch 2 and a power divider 3, the first connection end of the switching switch 1 is the third end of the first switching circuit, the second connection end of the switching switch 1 is connected to the first connection end of the switching switch 2, and the third connection end of the switching switch 1 is connected to the first end of the power divider 3; the second connection end of the switching switch 2 is the first end of the first switching circuit, and the third connection end of the switching switch 2 is connected to the second end of the power divider 3; the third end of the power divider 3 is the second end of the first switching circuit, the controlled end of the switching switch 1 is connected to the controlled end of the switching switch 2, and the connection node is the controlled end of the first switching circuit.

7. The signal communication terminal according to claim 1, characterized in that: The first antenna is a BS downlink diversity antenna, the second antenna is a BS downlink diversity antenna, the first signal processing circuit includes a filter 1, an amplifier 5, a power divider 4, an attenuator 5 and a filter 2, the input end of the filter 1 is the first end of the first signal processing circuit, and the output end of the filter 1 is connected to the input end of the amplifier 5; the input end of the power divider 4 is connected to the output end of the amplifier 5, the first output end of the power divider 4 is connected to the input end of the attenuator 5, and the second output end of the power divider 4 is the second end of the first signal processing circuit; the output end of the attenuator 5 is connected to the input end of the filter 2, and the output end of the filter 2 is the third end of the first signal processing circuit.

8. A signal communication system, characterized in that: It comprises a signal communication system base station, a mobile terminal, a routing terminal and a signal communication terminal as claimed in any one of claims 1 to 7; The signal communication system base station communicates with the first antenna of the signal communication terminal; the mobile terminal communicates with the second antenna; The routing terminal communicates with the routing circuit.

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