Transmission module and radio frequency active antenna

Abstract

The utility model belongs to the technical field of antennas, and provides a transmission module and a radio frequency active antenna, a main board end capacitance isolation unit is connected between a double-layer radio frequency coaxial line and a main board signal end, and the main board end capacitance isolation unit couples a grounding signal and a radio frequency signal into the double-layer radio frequency coaxial line. The antenna end capacitance isolation unit is connected between the double-layer radio frequency coaxial line and an antenna signal end, the antenna end capacitance isolation unit separates a grounding signal and a radio frequency signal from the double-layer radio frequency coaxial line, and the mainboard end inductance isolation unit couples two control signals with opposite polarities into the double-layer radio frequency coaxial line. Two control signals with opposite polarities are separated from the double-layer radio frequency coaxial line by the antenna end inductance isolation unit, so that transmission of radio frequency signals between a mainboard signal end and an antenna signal end is realized, and the problem that different signal transmission needs to be performed through a plurality of transmission lines for signal transmission between an existing active antenna and a radio frequency mainboard is solved. And the wiring is scattered.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of antennas, and particularly relates to a transmission module and a radio frequency active antenna. BACKGROUND

[0002] Active devices need to be placed on the single-cable coaxial line, and at least need to include a low noise amplifier (LNA), and can also have other devices: a power amplifier (PA) and a radio frequency switch (RFSwitch).

[0003] The active devices need power supply and control signals, and also have input radio frequency signals, so that the connection between the active devices and the mainboard needs to be implemented by multiple connection lines. For example, if only the LNA is placed on the single-cable coaxial line, the connection lines between the single-cable coaxial line and the mainboard include radio frequency signals, power supply lines, a power supply ground or a signal ground, and three control lines of the LNA and the RFSwitch. CONTENT OF THE UTILITY MODEL

[0004] The utility model provides a kind of transmission module and radio frequency active antenna, to solve the signal transmission between the active antenna and the radio frequency mainboard of existing needs to be carried out by different signal transmission of multiple transmission lines, leading to the problem of messy wiring.

[0005] To solve the above technical problems, the utility model provides a kind of transmission module, comprising:

[0006] Double-layer radio frequency coaxial line is connected between antenna signal end and mainboard signal end, and the double-layer radio frequency coaxial line includes inner layer axis and outer layer axis from inside to outside;Wherein, the inner layer axis is used to transmit radio frequency signal, and the outer layer axis is used to transmit ground signal;

[0007] Mainboard end capacitance isolation unit is connected between the double-layer radio frequency coaxial line and the mainboard signal end, and is used to couple the ground signal and the radio frequency signal into the double-layer radio frequency coaxial line;

[0008] Antenna end capacitance isolation unit is connected between the double-layer radio frequency coaxial line and the antenna signal end, and is used to separate the ground signal and the radio frequency signal from the double-layer radio frequency coaxial line;

[0009] Mainboard end inductance isolation unit is connected between the double-layer radio frequency coaxial line and mainboard control signal end, and is used to couple two control signals of opposite polarity into the double-layer radio frequency coaxial line;

[0010] Antenna end inductance isolation unit is connected between the double-layer radio frequency coaxial line and antenna control signal end, and is used to separate two control signals of opposite polarity from the double-layer radio frequency coaxial line.

[0011] In one embodiment, the mainboard end capacitance isolation unit comprises:

[0012] a first mainboard end capacitance connected between the inner layer axis and the mainboard signal end;

[0013] a second mainboard end capacitance connected between the outer layer axis and the reference ground;

[0014] In one embodiment, the antenna end capacitance isolation unit comprises:

[0015] a first antenna end capacitance connected between the inner layer axis and the antenna signal end;

[0016] a second antenna end capacitance connected between the outer layer axis and the reference ground.

[0017] In one embodiment, the first antenna end capacitance, the second antenna end capacitance, the first mainboard end capacitance, and the second mainboard end capacitance are adjustable capacitances.

[0018] In one embodiment, the antenna end inductance isolation unit comprises:

[0019] a first antenna end inductance connected between the inner layer axis and the antenna end first control signal end;

[0020] a second antenna end inductance connected between the outer layer axis and the antenna end second control signal end;

[0021] the mainboard end inductance isolation unit comprises:

[0022] a first mainboard end inductance connected between the inner layer axis and the mainboard end first control signal end;

[0023] a second mainboard end inductance connected between the outer layer axis and the mainboard end second control signal end.

[0024] In one embodiment, the first antenna end inductance, the second antenna end inductance, the first mainboard end inductance, and the second mainboard end inductance are adjustable inductances.

[0025] In one embodiment, the double-layer radio frequency coaxial line further comprises an insulating isolation layer for isolating signal interference between the inner layer axis and the outer layer axis.

[0026] The second aspect of the embodiments of the present application further provides a radio frequency active antenna, comprising:

[0027] a mainboard module connected to the mainboard signal end;

[0028] an antenna module connected to the antenna signal end;

[0029] The antenna signal end is connected with the mainboard signal end through the transmission module according to any one of the above.

[0030] In one embodiment, the mainboard module comprises:

[0031] The signal transmission unit is connected with the mainboard end first control signal end and the mainboard end second control signal end for receiving and outputting the radio frequency signal, and outputting the first control signal and the second control signal to the mainboard end first control signal end and the mainboard end second control signal end respectively.

[0032] The power amplification unit is connected with the signal transmission unit for receiving the radio frequency signal and the second control signal, and outputting the radio frequency signal after amplification processing according to the second control signal to the inner layer axis.

[0033] The mainboard radio frequency switching unit is connected with the inner layer axis and the signal transmission unit respectively for controlling the switching between the output of the radio frequency signal and the signal input of the inner layer axis, so as to output the radio frequency signal output by the signal transmission unit to the inner layer axis, and output the signal output by the inner layer axis to the signal transmission unit.

[0034] The antenna unit is used for transmitting and receiving radio frequency signals.

[0035] The antenna radio frequency switching unit is connected with the antenna end first control signal end, the antenna end second control signal end and the antenna signal end for switching control of the signal output and the signal input of the antenna signal end according to the signals provided by the antenna end first control signal end and the antenna end second control signal end.

[0036] The radio frequency front-end module is arranged between the antenna radio frequency switching unit and the antenna unit for low-noise amplification processing of the radio frequency signal received by the antenna unit according to the signal provided by the antenna end first control signal end.

[0037] The utility model discloses a beneficial effect: provide a kind of transmission module and radio frequency active antenna, this transmission module includes double-layer radio frequency coaxial line, mainboard end capacitance isolation unit, antenna end capacitance isolation unit, mainboard end capacitance isolation unit is connected between double-layer radio frequency coaxial line and mainboard signal end, by mainboard end capacitance isolation unit, ground signal and radio frequency signal are coupled into double-layer radio frequency coaxial line, antenna end capacitance isolation unit is connected between double-layer radio frequency coaxial line and antenna signal end, by antenna end capacitance isolation unit, ground signal and radio frequency signal are separated from double-layer radio frequency coaxial line, and by mainboard end inductance isolation unit, two control signals of opposite polarity are coupled into double-layer radio frequency coaxial line, by antenna end inductance isolation unit, two control signals of opposite polarity are separated from double-layer radio frequency coaxial line, to realize the transmission of radio frequency signal between mainboard signal end and antenna signal end, to solve the signal transmission between the active antenna of existing and radio frequency mainboard and need to be carried out different signal transmission by multiple transmission lines, cause the problem of scattered wiring. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the drawings needed to be used in the embodiment description will be simply introduced below, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0039] Figure 1 The structure diagram of transmission module provided for the embodiment of the application Figure 1 ;

[0040] Figure 2 The structure diagram of transmission module provided for the embodiment of the application Figure 2 ;

[0041] Figure 3 The structure diagram of transmission module provided for the embodiment of the application Figure 3 ;

[0042] Figure 4 The structure diagram of radio frequency active antenna provided for the embodiment of the application Figure 1 ;

[0043] Figure 2 The structure diagram of radio frequency active antenna provided for the embodiment of the application Figure 6 ;

[0044] Figure 1 The signal conversion circuit applied to second control signal and first control signal provided for the embodiment of the application. DETAILED DESCRIPTION

[0045] In order to make the person skilled in the art better understand the technical scheme of the present application, the technical scheme in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor shall belong to the protection scope of the present application.

[0046] The terms "comprise", "comprising", "include", "including", "contain", "containing", "have", "having", "composed of", and any variations thereof, in the specification and in the claims of the present application and in the above drawings, are intended to cover non-exclusive inclusion. For example, a process, method, or system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally further comprises steps or units not listed, or optionally further comprises other steps or units inherent to these processes, methods, products or devices. In addition, the terms "first", "second" and "third" and the like are used to distinguish different objects, not to describe a specific order.

[0047] To solve the above technical problems, the embodiment of the present application provides a transmission module, as shown in the figure Figure 2 The transmission module 100 comprises a double-layer radio frequency coaxial line 110, a mainboard end capacitor isolation unit 120, an antenna end capacitor isolation unit 130, a mainboard end inductance isolation unit 140, and an antenna end inductance isolation unit 150.

[0048] Specifically, the double-layer radio frequency coaxial line 110 is connected between the antenna signal end 135 and the mainboard signal end 125, and in combination with Figure 2 As shown in the figure, the double-layer radio frequency coaxial line 110 comprises an inner layer coaxial line 111 and an outer layer coaxial line 112 from inside to outside; wherein the inner layer coaxial line 111 is used for transmitting radio frequency signals, and the outer layer coaxial line 112 is connected to a signal ground and is used for transmitting ground signals. The mainboard end capacitor isolation unit 120 is connected between the double-layer radio frequency coaxial line 110 and the mainboard signal end 125, and the ground signal and the radio frequency signal are coupled into the double-layer radio frequency coaxial line 110 by the mainboard end capacitor isolation unit 120. The antenna end capacitor isolation unit 130 is connected between the double-layer radio frequency coaxial line 110 and the antenna signal end 135, and the ground signal and the radio frequency signal are separated from the double-layer radio frequency coaxial line 110 by the antenna end capacitor isolation unit 130.

[0049] The mainboard end inductance isolation unit 140 is connected between the double-layer radio frequency coaxial line 110 and the mainboard control signal end 160, and the antenna end inductance isolation unit 150 is connected between the double-layer radio frequency coaxial line 110 and the antenna control signal end 170. By filling the radio frequency signal into the double-layer radio frequency coaxial line 110 after the radio frequency signal passes through the mainboard end capacitance isolation unit 120, and coupling two control signals with opposite polarities into the double-layer radio frequency coaxial line 110 by the mainboard end inductance isolation unit 140, and separating two control signals with opposite polarities from the double-layer radio frequency coaxial line 110 by the antenna end inductance isolation unit 150, the problem that the signal transmission between the existing active antenna and the radio frequency mainboard needs to be performed through different signal transmission of multiple transmission lines, resulting in disordered wiring, is solved.

[0050] In one embodiment, in combination with Figure 3 As shown in the figure, the double-layer radio frequency coaxial line 110 further comprises an insulating isolation layer 113, which is located between the inner layer axis 111 and the outer layer axis 112, and is used for isolating the signal interference between the inner layer axis 111 and the outer layer axis 112.

[0051] In one specific application embodiment, the insulating isolation layer 113 can be a signal insulating layer made of insulating material.

[0052] In one specific application embodiment, a signal shielding layer for shielding the signal interference between the inner layer axis 111 and the outer layer axis 112 is arranged in the signal insulating layer.

[0053] Specifically, the signal shielding layer can be made of red copper or tinned copper, and is wrapped by the signal insulating layer to avoid electrical contact between the inner layer axis 111 and the outer layer axis 112.

[0054] The metal in the signal shielding layer needs to be grounded, and external interference signals can be introduced into the ground by the layer. The signal shielding layer can be made of a shielded wire, for example, a wire with a metal braid shell specially used to reduce the influence of external electromagnetic fields on power supply or communication lines. By arranging the shielded wire, the line can be prevented from radiating electromagnetic energy outward.

[0055] In one embodiment, in combination with Figure 3 As shown in the figure, the mainboard end capacitance isolation unit 120 comprises a first mainboard end capacitance 121 and a second mainboard end capacitance 122, and the antenna end capacitance isolation unit 130 comprises a first antenna end capacitance 131 and a second antenna end capacitance 132.

[0056] The antenna signal end 135 is used for connecting an antenna module to realize signal input and signal output between the double-layer radio frequency coaxial line 110 and the antenna module, and the mainboard signal end 125 is used for connecting a mainboard module to realize signal input and signal output between the double-layer radio frequency coaxial line 110 and the mainboard module.

[0057] The first main board end capacitor 121 is connected between the inner layer axis 111 and the main board signal end 125, and the second main board end capacitor 122 is connected between the outer layer axis 112 and the reference ground GND. The radio frequency signal and the reference ground signal are filled into the double-layer radio frequency coaxial line 110 through the first main board end capacitor 121 and the second main board end capacitor 122, and are transmitted to the antenna module by the double-layer radio frequency coaxial line 110. The first antenna end capacitor 131 is connected between the inner layer axis 111 and the antenna signal end 135, and the second antenna end capacitor 132 is connected between the outer layer axis 112 and the reference ground GND. The radio frequency signal and the reference ground signal are separated from the inner layer axis 111 and the outer layer axis 112 of the double-layer radio frequency coaxial line 110 through the first antenna end capacitor 131 and the second antenna end capacitor 132.

[0058] In one embodiment, in combination Figure 4 As shown, the antenna end inductance isolation unit 150 includes the first antenna end inductance 133 and the second antenna end inductance 134, and the main board end inductance isolation unit 140 includes the first main board end inductance 123 and the second main board end inductance 124.

[0059] The main board control signal end 160 includes the main board end first control signal end 126 and the main board end second control signal end 127, and the antenna control signal end 170 includes the antenna end first control signal end 137 and the antenna end second control signal end 136.

[0060] The first antenna end inductance 133 is connected between the inner layer axis 111 and the antenna end first control signal end 137, and the second antenna end inductance 134 is connected between the outer layer axis 112 and the antenna end second control signal end 136. The antenna end first control signal end 137 and the antenna end second control signal end 136 are respectively connected to the first antenna end inductance 133 and the second antenna end inductance 134, and the first control signal and the second control signal are separated from the double-layer radio frequency coaxial line 110 through the first antenna end inductance 133 and the second antenna end inductance 134.

[0061] The first main board end inductance 123 is connected between the inner layer axis 111 and the main board end first control signal end 126, and the second main board end inductance 124 is connected between the outer layer axis 112 and the main board end second control signal end 127.

[0062] The main board end first control signal end 126 and the main board end second control signal end 127 are respectively connected to the first main board end inductance 123 and the second main board end inductance 124, and the first control signal and the second control signal are filled into the double-layer radio frequency coaxial line 110 through the first main board end inductance 123 and the second main board end inductance 124.

[0063] In the embodiment, the connection between the antenna module and the mainboard module only needs one double-layer radio frequency coaxial line 110 to realize all signal transmission. The innermost inner layer coaxial line 111 in the double-layer radio frequency coaxial line 110 is used to transmit radio frequency signals, and the outer layer coaxial line 112 is used to transmit a ground reference signal. Compared with a common radio frequency passive antenna, the appearance is consistent, and only one coaxial line is needed to realize signal transmission, without the need to increase the number of coaxial lines, which can solve the problem that the signal transmission between the existing active antenna and the radio frequency mainboard needs to be transmitted through multiple transmission lines.

[0064] In one embodiment, the first mainboard end capacitor 121, the second mainboard end capacitor 122, the first antenna end capacitor 131, and the second antenna end capacitor 132 are isolation capacitors.

[0065] In specific applications, if the transmission module in the embodiment is applied to radio frequency signal transmission of the 2.4G frequency band, isolation capacitors with a capacitance value of 10pF are needed. If the transmission module in the embodiment is applied to radio frequency signal transmission of the 5G frequency band, isolation capacitors with a capacitance value of 3.3pF are needed. In other application scenarios, the capacitance value of the isolation capacitors of other frequency bands can be determined through simulation.

[0066] In one embodiment, the isolation capacitors are adjustable capacitors, that is, the first mainboard end capacitor 121, the second mainboard end capacitor 122, the first antenna end capacitor 131, and the second antenna end capacitor 132 can each be one or more adjustable capacitors.

[0067] In the embodiment, by setting the first mainboard end capacitor 121, the second mainboard end capacitor 122, the first antenna end capacitor 131, and the second antenna end capacitor 132 as adjustable capacitors, the capacitance value of the adjustable capacitors can be adjusted according to the specific application scenario of the transmission module, thereby achieving the purpose of increasing the application range of the transmission module.

[0068] In one embodiment, the number of isolation capacitors is multiple, the multiple isolation capacitors are connected in parallel, and each isolation capacitor is connected in series with an isolation switch.

[0069] In the embodiment, by setting multiple parallel isolation capacitors, and then connecting each isolation capacitor in series with an isolation switch, the capacitance value adjustment of the antenna end capacitors and the mainboard end capacitors is realized by the switch combination of multiple isolation switches, so that the transmission module is suitable for specific communication application scenarios, and the corresponding isolation capacitors can be adjusted according to the switching of the communication application scenarios, thereby avoiding the problem that the single application scenario of the transmission module leads to performance degradation or inability to use when the use environment changes.

[0070] In one embodiment, the first antenna-end inductor 133, the second antenna-end inductor 134, the first mainboard-end inductor 123, and the second mainboard-end inductor 124 can each be composed of one or more isolation inductors.

[0071] In a specific application, if the transmission module in the embodiment is applied to the transmission of a radio frequency signal in the 2.4G frequency band, an isolation inductor with an inductance value of 24nH is required, and if the transmission module in the embodiment is applied to the transmission of a radio frequency signal in the 5G frequency band, an isolation inductor with an inductance value of 9.1nH is required. In other application scenarios, the capacitance value of the isolation inductor can be determined by simulation for other frequency bands.

[0072] In one embodiment, the isolation inductor is an adjustable inductor.

[0073] In the embodiment, by setting the first antenna-end inductor 133 and the second antenna-end inductor 134, the first mainboard-end inductor 123 and the second mainboard-end inductor 124 as adjustable inductors, the inductance value of the adjustable inductor can be adjusted according to the specific application scenario of the transmission module, thereby achieving the purpose of increasing the application range of the transmission module.

[0074] In one embodiment, the number of isolation inductors is multiple, the multiple isolation inductors are connected in parallel, and each isolation inductor is connected in series with an isolation switch.

[0075] In the embodiment, by setting multiple parallel isolation inductors, and then connecting each isolation inductor in series with an isolation switch, the inductance value of the antenna-end inductor and the mainboard-end inductor can be adjusted by the switch combination of multiple isolation switches, so that the transmission module is applicable to specific communication application scenarios, and the corresponding isolation inductor can be adjusted according to the switching of the communication application scenario, thereby avoiding the problem of performance reduction or inability to use when the use environment changes due to the single application scenario of the transmission module.

[0076] In one embodiment, the outer layer axis 112 is wrapped around the periphery of the inner layer axis 111.

[0077] In the embodiment, the inner layer axis 111 can be a solid wire, and the outer layer axis 112 can be a hollow wire. At this time, the inner layer axis 111 and the outer layer axis 112 are arranged layer by layer, the inner layer axis 111 is arranged in the center through hole of the outer layer axis 112, and the inner layer axis 111 and the outer layer axis 112 are signal-isolated by the insulating isolation layer 113.

[0078] In one specific application embodiment, the inner layer axis 111 and the outer layer axis 112 have the same axis center.

[0079] In one embodiment, referring to Figure 5As shown in the figure, the mainboard module 200 comprises a signal transmission unit 210, a power amplification unit 220 and a mainboard radio frequency switching unit 230.

[0080] The signal transmission unit 210 is connected with the mainboard end first control signal end 126 and the mainboard end second control signal end 127, and is used for receiving and outputting the radio frequency signal and outputting the first control signal and the second control signal to the mainboard end first control signal end 126 and the mainboard end second control signal end 127 respectively.

[0081] Specifically, the mainboard end first control signal end 126 and the mainboard end second control signal end 127 are connected with the first mainboard end inductor 123 and the second mainboard end inductor 124 respectively, and the first control signal and the second control signal are filled into the double-layer radio frequency coaxial line 110 through the first mainboard end inductor 123 and the second mainboard end inductor 124.

[0082] The power amplification unit 220 is connected with the signal transmission unit 210, and is used for receiving the radio frequency signal and the second control signal and performing amplification processing on the radio frequency signal according to the second control signal and then outputting to the inner layer axis 111.

[0083] The mainboard radio frequency switching unit 230 is connected with the inner layer axis 111 and the signal transmission unit 210 respectively, and controls the switching between the output of the radio frequency signal and the signal input of the inner layer axis 111 through the mainboard radio frequency switching unit 230, so as to output the radio frequency signal output by the signal transmission unit 210 to the inner layer axis 111 and output the signal output by the inner layer axis 111 to the signal transmission unit 210.

[0084] In this embodiment, the double-layer radio frequency coaxial line 110 is used as the mainboard module 200 and the antenna module 300 are connected through the double-layer radio frequency coaxial line 110. Figure 4 As shown in the figure, the outer layer axis 112 is connected with the reference ground GND through the second mainboard end capacitor 122, the reference ground GND fills the ground reference signal into the outer layer axis 112 through the second capacitor isolation module 122, the first control signal and the second control signal are two opposite pulse square wave signals, and are combined into the radio frequency signal and the ground reference signal through the first mainboard end inductor 123 and the second mainboard end inductor 124 and then transmitted to the antenna module through the double-layer radio frequency coaxial line 110.

[0085] When the mainboard module sends a radio frequency signal to the antenna module, since the power amplification unit 220 is arranged between the signal sending end of the signal transmission unit 210 and the mainboard radio frequency switching unit 230, the radio frequency signal output by the signal sending end of the signal transmission unit 210 can be amplified by the power amplification unit 220, and then output to the inner layer axis 111 by the mainboard radio frequency switching unit 230. Meanwhile, the second control signal provided by the signal transmission unit 210 is combined into a ground reference signal after passing through the second mainboard end inductor 124, and then sent to the antenna module by the outer layer axis 112. The first control signal is combined into a radio frequency signal after passing through the first mainboard end inductor 123, and then sent to the antenna module by the inner layer axis 111.

[0086] When the antenna module 300 sends a radio frequency signal to the mainboard module 200, the mainboard radio frequency switching unit 230 connects the inner layer axis 111 to the signal receiving end of the signal transmission unit 210.

[0087] In a specific application embodiment, the signal transmission unit 210 can be a signal transmitter or a mainboard signal port. For example, when the signal transmission unit 210 is a mainboard signal port, it is used to provide a radio frequency signal, a first control signal and a second control signal to the double-layer radio frequency coaxial line 110, and receive a radio frequency signal input by the double-layer radio frequency coaxial line 110. The power signal can be used to power each functional module in the mainboard module 200.

[0088] In an embodiment, as shown in Figure 5 The mainboard module 200 further includes a resistance attenuation unit 240.

[0089] The resistance attenuation unit 240 is connected to the signal transmission unit 210. The resistance attenuation unit 240 can perform attenuation processing on the signal input by the inner layer axis 111 according to the attenuation control signal provided by the signal transmission unit 210.

[0090] In this embodiment, if the strength of the radio frequency signal provided by the antenna module 300 is high, the radio frequency signal input to the signal transmission unit 210 can be attenuated by arranging the resistance attenuation unit 240 between the mainboard radio frequency switching unit 230 and the signal transmission unit 210, so as to avoid the packet loss problem caused by high signal strength when receiving signals at a short distance.

[0091] In an embodiment, as shown in Figure 4 The resistance attenuation unit 240 includes an attenuation inverter 241, an attenuation switching switch 243 and a signal attenuator 242.

[0092] Specifically, the attenuation inverter 241 is connected to the signal transmission unit 210, the attenuation inverter 241 receives the attenuation control signal provided by the signal transmission unit 210, and the attenuation control signal is inverted to generate an inverted attenuation control signal, and the attenuation switch 243 is connected to the signal transmission unit 210 and the attenuation inverter 241, and the attenuation switch 243 is switched according to the attenuation control signal and the inverted attenuation control signal to select whether the signal attenuator 242 is connected to the signal chain between the mainboard radio frequency switching unit 230 and the signal transmission unit 210.

[0093] In a specific application, if the transmission module in this embodiment receives signals at a distance from the signal source, there is no strong signal problem in this use scenario, and the signal transmission unit 210 provides a corresponding attenuation control signal to the attenuation switch 243, and the attenuation switch 243 shorts the signal attenuator 242, thereby directly connecting the inner axis 111 to the signal transmission unit 210.

[0094] If the transmission module in this embodiment receives signals at a distance, the signal transmission unit 210 provides a corresponding attenuation control signal to the attenuation switch 243, and the attenuation switch 243 connects the signal attenuator 242 to the signal chain between the inner axis 111 and the signal transmission unit 210.

[0095] In one embodiment, referring to Figure 5 As shown, the mainboard module 200 further includes a first drive unit 251 and a second drive unit 252.

[0096] In this embodiment, the first drive unit 251 is connected between the signal transmission unit 210 and the first mainboard end inductor 123, and the second drive unit 252 is connected between the signal transmission unit 210 and the second mainboard end inductor 124. The first control signal output by the signal transmission unit 210 is power amplified by the first drive unit 251 to improve the driving capability of the first control signal, and is combined with the radio frequency signal after the first mainboard end inductor 123 and transmitted to the antenna module. The second control signal output by the signal transmission unit 210 is power amplified by the second drive unit 252 to improve the driving capability of the second control signal, and is transmitted to the antenna module after the second mainboard end inductor 124, thereby enabling the antenna module to extract the power signal.

[0097] In one embodiment, the first drive unit 251 and the second drive unit 252 can be metal-oxide-semiconductor field-effect transistors (MOSFETs). In one embodiment, referring to Figure 5As shown, the antenna module 300 includes: an antenna unit ANT, an antenna RF switching unit 330, and an RF front-end module 340.

[0098] Specifically, the antenna unit ANT is used to transmit and receive radio frequency signals. The first control signal terminal 137 and the second control signal terminal 136 of the antenna end are respectively connected to the first antenna end inductor 133 and the second antenna end inductor 134. The second control signal and the first control signal are separated from the double-layer radio frequency coaxial line 110 through the first antenna end inductor 133 and the second antenna end inductor 134.

[0099] The antenna RF switching unit 330 is connected to the first control signal terminal 137, the second control signal terminal 136, and the antenna signal terminal 135. The antenna RF switching unit 330 switches the signal output and signal input of the inner axis 111 according to the first control signal and the second control signal.

[0100] The radio frequency front-end module 340 is located between the antenna radio frequency switching unit 330 and the antenna unit ANT. The radio frequency front-end module 340 performs low-noise amplification processing on the radio frequency signal received by the antenna unit ANT.

[0101] In one specific application embodiment, the radio frequency front-end module 340 includes a low-noise amplifier 342 and a radio frequency switching switch 343.

[0102] Specifically, the antenna RF switching unit 330 sends RF signals to the antenna unit ANT, and the low noise amplifier 342 is connected between the antenna RF switching unit 330 and the RF switching switch 343. The low noise amplifier 342 is used to perform low noise processing on the RF signals sent by the antenna unit ANT to the inner axis 111, and the RF switching switch 343 is used to control the signal flow in the RF link according to the first control signal and the second control signal.

[0103] In this embodiment, by setting a low-noise amplifier 342 in the antenna module 300, the radio frequency signal received by the antenna unit ANT can be amplified with low noise, thereby improving the receiving capability of the entire antenna system and greatly enhancing the performance of the antenna system.

[0104] Furthermore, a power amplifier can be installed in the antenna module 300. The power amplifier is located between the antenna RF switching unit 330 and the RF switching switch 343, which can improve the transmission capability of the entire antenna system and improve the performance of the antenna system. At the same time, by keeping the heat source of the power amplifier 341 away from the motherboard, the heat dissipation of the motherboard in the antenna system can be improved, thereby improving the performance of the entire system.

[0105] Combination Figure 6As shown, when the mainboard module 200 sends a radio frequency signal to the antenna module 300, the radio frequency signal and the ground reference signal provided by the mainboard module 200 are output to the antenna radio frequency switching unit 330 through the double-layer radio frequency coaxial line 110. Since the radio frequency signal is combined with the power amplification signal, and the ground reference signal is combined with the first control signal, at this time, the second control signal and the first control signal are separated from the double-layer radio frequency coaxial line 110 through the first antenna end inductor 133 and the second antenna end inductor 134, and are output to the antenna radio frequency switching unit 330 and the radio frequency front-end module 340, so as to control the working state of the antenna radio frequency switching unit 330 and the radio frequency front-end module 340.

[0106] When the antenna module 300 sends a radio frequency signal to the mainboard module 200, the radio frequency switching switch 343 in the radio frequency front-end module 340 switches the radio frequency link to between the low-noise amplifier 342 and the antenna unit ANT. The low-noise amplifier 342 is used for low-noise processing of the radio frequency signal sent by the antenna unit ANT to the inner layer coaxial line 111, and the antenna radio frequency switching unit 330 switches the output end of the low-noise amplifier 342 to be connected with the inner layer coaxial line 111.

[0107] In a specific application, the power supply of the active device (such as the antenna radio frequency switching unit 330, the radio frequency switching switch 343, and the low-noise amplifier 342) at the antenna end needs to be separated from the two control signals (the second control signal and the first control signal) with opposite polarities.

[0108] In combination ​ As shown, the second control signal and the first control signal with opposite polarities are converted into a power supply through a power rectifier bridge, and then are converted into a stable direct-current power supply through a Boost-Buck voltage conversion circuit to supply power to the load resistor (i.e., the active device at the antenna end).

[0109] The embodiment of the present application also provides an electronic device, which comprises the transmission module according to any one of the above embodiments.

[0110] In the embodiment, the electronic device comprises an antenna unit, which is connected with a corresponding mainboard unit through the transmission module according to any one of the above embodiments, and transmits a radio frequency signal through the transmission module.

[0111] The embodiment of the application provides a transmission module and a radio frequency active antenna, the transmission module comprises a double-layer radio frequency coaxial line, a mainboard end capacitor isolation unit and an antenna end capacitor isolation unit, the mainboard end capacitor isolation unit is connected between the double-layer radio frequency coaxial line and a mainboard signal end, ground signals and radio frequency signals are coupled into the double-layer radio frequency coaxial line by the mainboard end capacitor isolation unit, the antenna end capacitor isolation unit is connected between the double-layer radio frequency coaxial line and an antenna signal end, the ground signals and the radio frequency signals are separated from the double-layer radio frequency coaxial line by the antenna end capacitor isolation unit, two control signals with opposite polarities are coupled into the double-layer radio frequency coaxial line by the mainboard end inductance isolation unit, the two control signals with opposite polarities are separated from the double-layer radio frequency coaxial line by the antenna end inductance isolation unit, so that the transmission of the radio frequency signals between the mainboard signal end and the antenna signal end is realized, and the problem that the signal transmission between the existing active antenna and the radio frequency mainboard needs to be performed through different signal transmission of multiple transmission lines and causes disordered wiring is solved.

[0112] In the above embodiments, the description of each embodiment has its own focus, and the parts not described or recorded in a certain embodiment can be referred to the related description of other embodiments.

[0113] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place. Part or all of the units can be selected to achieve the purpose of the embodiment scheme according to actual needs.

[0114] In addition, each functional unit in each embodiment of the application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit.

[0115] The above-described embodiments are only used to illustrate the technical solutions of the application, rather than limit them; although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the application, and should be included in the protection scope of the application.

Claims

1. A transmission module, characterized in that, include: A dual-layer RF coaxial cable is connected between the antenna signal terminal and the motherboard signal terminal. The dual-layer RF coaxial cable includes an inner layer axis and an outer layer axis from the inside to the outside. The inner layer axis is used to transmit RF signals, and the outer layer axis is used to transmit ground signals. A motherboard-side capacitor isolation unit is connected between the dual-layer RF coaxial cable and the motherboard signal terminal, and is used to couple the ground signal and the RF signal to the dual-layer RF coaxial cable. An antenna-end capacitor isolation unit is connected between the dual-layer RF coaxial line and the antenna signal end, and is used to separate the ground signal and the RF signal from the dual-layer RF coaxial line; The motherboard-side inductor isolation unit is connected between the dual-layer RF coaxial cable and the motherboard control signal terminal, and is used to couple two control signals of opposite polarities into the dual-layer RF coaxial cable. An antenna-end inductor isolation unit is connected between the dual-layer RF coaxial line and the antenna control signal terminal, and is used to separate two control signals with opposite polarities from the dual-layer RF coaxial line.

2. The transmission module of claim 1, wherein, The motherboard-side capacitor isolation unit includes: The first motherboard terminal capacitor is connected between the inner layer axis and the motherboard signal terminal; The second motherboard capacitor is connected between the outer axis and the reference ground.

3. The transmission module of claim 2, wherein, The antenna-end capacitor isolation unit includes: The first antenna terminal capacitor is connected between the inner layer axis and the antenna signal terminal; The second antenna terminal capacitor is connected between the outer layer axis and the reference ground.

4. The transmission module of claim 3, wherein, The first antenna end capacitor, the second antenna end capacitor, the first motherboard end capacitor, and the second motherboard end capacitor are adjustable capacitors.

5. The transport module of claim 2, wherein, The antenna-end inductor isolation unit includes: The first antenna end inductor is connected between the inner layer axis and the first control signal terminal of the antenna end; The second antenna terminal inductor is connected between the outer layer axis and the second control signal terminal of the antenna terminal; The motherboard-side inductor isolation unit includes: The first motherboard inductor is connected between the inner layer axis and the first control signal terminal on the motherboard. The second motherboard inductor is connected between the outer axis and the second control signal terminal on the motherboard.

6. The transmission module of claim 5, wherein, The first antenna end inductor, the second antenna end inductor, the first motherboard end inductor, and the second motherboard end inductor are adjustable inductors.

7. The transport module of any one of claims 1 or 2, wherein, The dual-layer radio frequency coaxial line also includes an insulating isolation layer, which is used to isolate signal interference between the inner layer axis and the outer layer axis.

8. A radio frequency active antenna, characterized by include: The motherboard module is connected to the signal terminals of the motherboard; The antenna module is connected to the antenna signal terminal; The antenna signal terminal is connected to the motherboard signal terminal via the transmission module as described in any one of claims 1-7.

9. The radio-frequency active antenna according to claim 8, characterized in that, The motherboard module includes: The signal transmission unit is connected to the first control signal terminal and the second control signal terminal on the motherboard, and is used to receive and output the radio frequency signal, and output the first control signal and the second control signal to the first control signal terminal and the second control signal terminal on the motherboard respectively. A power amplification unit is connected with the signal transmission unit, used for receiving the radio frequency signal and the second control signal, and amplifying the radio frequency signal according to the second control signal and outputting to the inner layer axis; A mainboard radio frequency switching unit is connected with the inner layer axis and the signal transmission unit respectively, used for controlling the switching between the output of the radio frequency signal and the signal input of the inner layer axis, so as to output the radio frequency signal output by the signal transmission unit to the inner layer axis, and output the signal output by the inner layer axis to the signal transmission unit.

10. The radio-frequency active antenna according to claim 8, characterized in that, The antenna module comprises: An antenna unit is used for transmitting and receiving radio frequency signals; An antenna radio frequency switching unit is connected with the antenna end first control signal end, the antenna end second control signal end and the antenna signal end, used for switching and controlling the signal output and signal input of the antenna signal end according to the signals provided by the antenna end first control signal end and the antenna end second control signal end; A radio frequency front end module is arranged between the antenna radio frequency switching unit and the antenna unit, used for low noise amplification processing the radio frequency signal received by the antenna unit according to the signal provided by the antenna end first control signal end.

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