Radio Frequency Front-End Module and Its Control Method, Antenna, Antenna System, and Electronic Device

Abstract

The present invention provides a radio frequency front-end module, a control method thereof, an antenna, an antenna system, and an electronic device. The circuit includes: a radio frequency interface, a transmitting path, a receiving path, a duplexer, a frequency selection circuit, a voltage detection circuit, and a voltage conversion circuit; the radio frequency interface is connected to the transmitting path and the receiving path respectively through the duplexer; the radio frequency interface is further connected to the voltage conversion circuit through the frequency selection circuit and the voltage detection circuit in sequence; the voltage conversion circuit is connected to the transmitting path and the receiving path respectively; the voltage detection circuit is further connected to the transmitting path; the radio frequency interface is used to connect to a host; the voltage detection circuit is used to detect the power supply voltage of the host to the radio frequency front-end module and control the opening and closing states of the transmitting path and the receiving path based on the power supply voltage. The radio frequency front-end module, the control method thereof, the antenna, the antenna system, and the electronic device provided by the present invention can simplify the interface of the radio frequency front-end module and the cable connecting to the host, with simpler wiring and lower cost.

Description

Technical Field

[0001] The present invention relates to the field of communication technologies, and in particular, to a radio frequency front-end module, a control method thereof, an antenna, an antenna system, and an electronic device. Background Art

[0002] When the antenna system is integrally designed, the radio frequency front-end module and the host are structurally located in the same chassis. As Figure 1 shown, in the existing antenna system, the radio frequency front-end module has four interfaces connected to the host: a two-core power supply interface, a two-core control interface, and two radio frequency interfaces (a first radio frequency interface and a second radio frequency interface). The power supply interface is connected to the host through a power line, and the host supplies power (the voltage is generally +28V). The control interface is connected to the host through a control line to transmit a control signal EN. The two radio frequency interfaces are respectively connected to the host through radio frequency cable lines.

[0003] The radio frequency front-end module has three working states: a. The transceiver is simultaneously turned on state, that is, +28V power supply and EN is 1; b. Only the receiving working state, that is, +28V power supply and EN is 0; c. The module is turned off state, that is, +28V is not powered.

[0004] The two-core power supply interface is connected to a voltage conversion circuit. The voltage conversion circuit may include a DC-DC converter (which may be abbreviated as "DC-DC") and a low dropout regulator (LDO, Low Dropout Regulator). The two-core power supply interface is connected to the first end of the DC-DC converter; the DC-DC converter converts the +28V voltage input at the first end into a +5V voltage and outputs it through the second end of the DC-DC converter; the second end of the DC-DC converter is connected to the LDO, and the LDO outputs a +3.3V voltage.

[0005] The transmitting path is used to connect the first radio frequency interface and the radiation unit. The transmitting path may include a first amplifier, a first filter, a second amplifier, and a third amplifier connected in sequence. The first amplifier is also connected to the first radio frequency interface, and the third amplifier is also connected to the radiation unit. The first amplifier, the second amplifier, and the third amplifier respectively serve as a pre-amplifier, a drive amplifier, and a final power amplifier.

[0006] The control interface is respectively connected to the control ends of the first amplifier, the second amplifier, and the third amplifier to transmit a control signal EN. The control signal EN is a transmission enable signal, that is, when EN is 1, the transmitting path is turned on, and when EN is 0, the transmitting path is turned off.

[0007] A receiving path for connecting the second RF interface and the radiation unit. The receiving path may include a first low noise amplifier (referred to as "LNA", Low Noise Amplifier for short), a second filter, a second low noise amplifier, a coupler, and a third low noise amplifier connected in sequence. The first low noise amplifier is also connected to the radiation unit; the third low noise amplifier is also connected to the second RF interface.

[0008] Exemplarily, the operating voltages of the first amplifier, the second amplifier, the third amplifier, the first low noise amplifier, the second low noise amplifier, and the third low noise amplifier are +5V, +5V, +28V, +3.3V, +3.3V, +3.3V respectively, and the operating currents are 65mA, 1.5A, 3.5A, 15mA, 15mA, 15mA respectively. The coupler is a 3dB coupler; in the state where both transmitting and receiving are turned on, the power consumption of the RF front-end module can be 28×3.5 + 5×1.5 + 5×0.065 + 3.3×0.015×3 = 105.97W; in the state of only receiving, the power consumption of the RF front-end module can be 3.3×0.015×3 = 0.15W.

[0009] In the case where the distance between the RF front-end module and the host is relatively far, for example, the distance between the RF front-end module and the host is greater than or equal to 10 meters, the connection method of 4 interfaces and 4 cables is very complex in terms of connection and wiring.

[0010] In summary, the prior art has deficiencies such as high cost and complex wiring. Summary of the Invention

[0011] The present invention provides an RF front-end module, its control method, an antenna, an antenna system, and an electronic device to solve the defect of complex wiring in the prior art and realize the simplification of wiring and cost reduction of the antenna system.

[0012] The present invention provides an RF front-end module, including: an RF interface, a transmitting path, a receiving path, a duplexer, a frequency selection circuit, a voltage detection circuit, and a voltage conversion circuit;

[0013] The RF interface is respectively connected to the transmitting path and the receiving path through the duplexer;

[0014] The RF interface is also sequentially connected to the voltage conversion circuit through the frequency selection circuit and the voltage detection circuit; the voltage conversion circuit is respectively connected to the transmitting path and the receiving path; the voltage detection circuit is also connected to the transmitting path;

[0015] The RF interface is used to connect to the host;

[0016] The voltage detection circuit is used to detect the power supply voltage of the host to the radio frequency front-end module, and based on the power supply voltage, control the opening and closing states of the transmitting path and the receiving path.

[0017] According to a radio frequency front-end module provided by the present invention, the frequency selection circuit includes a first inductor.

[0018] According to a radio frequency front-end module provided by the present invention, the transmitting path includes: a first amplifier, a first filter, a second amplifier, and a third amplifier connected in sequence; the first amplifier is connected to the duplexer;

[0019] The third amplifier is further used to connect to the radiation unit.

[0020] According to a radio frequency front-end module provided by the present invention, the receiving path includes: a first low-noise amplifier, a second filter, a second low-noise amplifier, a coupler, and a third low-noise amplifier connected in sequence; the third low-noise amplifier is connected to the duplexer;

[0021] The first low-noise amplifier is further used to connect to the radiation unit.

[0022] According to a radio frequency front-end module provided by the present invention, the voltage conversion circuit includes: a DC-DC converter and a low-dropout linear regulator;

[0023] The first end of the DC-DC converter is connected to the first output end of the voltage detection circuit; the second end of the DC-DC converter is respectively connected to the second output end of the voltage detection circuit, the input end of the low-dropout linear regulator, the first amplifier, and the second amplifier; the first output end of the voltage detection circuit is further connected to the third amplifier;

[0024] The output end of the low-dropout linear regulator is respectively connected to the first low-noise amplifier, the second low-noise amplifier, and the third low-noise amplifier.

[0025] The present invention also provides a control method for a radio frequency front-end module as described in any one of the above, characterized by including:

[0026] The frequency selection circuit transmits the DC power supply signal in the signal input by the host to the radio frequency front-end module to the voltage detection circuit;

[0027] The voltage detection circuit detects the voltage of the DC power supply signal to obtain the power supply voltage;

[0028] The voltage detection circuit controls the opening and closing states of the transmitting path and the receiving path based on the power supply voltage.

[0029] A control method for a radio frequency front-end module provided by the present invention, wherein the voltage detection circuit controls the opening and closing states of the transmitting path and the receiving path based on the supply voltage, specifically including:

[0030] When the supply voltage is a first voltage value, control both the transmitting path and the receiving path to be in an open state;

[0031] When the supply voltage is a second voltage value, control the transmitting path to be in a closed state and control the receiving path to be in an open state;

[0032] When the supply voltage is zero, control both the transmitting path and the receiving path to be in a closed state;

[0033] Wherein, the first voltage value is greater than the second voltage value.

[0034] The present invention also provides an antenna, including: the radio frequency front-end module as described in any one of the above and a radiation unit connected to the radio frequency front-end module.

[0035] The present invention also provides an antenna system, including: the antenna as described in any one of the above and a host; the radio frequency front-end module in the antenna is connected to the host through a radio frequency cable.

[0036] The present invention also provides an electronic device, including: the antenna system as described in any one of the above.

[0037] The radio frequency front-end module and its control method, antenna, antenna system and electronic device provided by the present invention, by connecting to the host only through a radio frequency interface and a radio frequency cable, realizing the transmission of the transmit signal and the receive signal through one radio frequency cable through a duplexer, separating the DC power supply signal in the input signal transmitted through the radio frequency cable through a frequency selection circuit, and controlling the opening and closing states of the transmitting path and the receiving path according to the detected voltage of the DC power supply signal by the voltage detection circuit. On the premise of ensuring the normal operation of the radio frequency front-end module, that is, three working states can be realized, the interface of the radio frequency front-end module and the cable connected to the host can be simplified, and the wiring of the antenna system is simpler, the cost is lower, and the power consumption is lower. Description of the Drawings

[0038] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to these drawings without creative efforts.

[0039] Figure 1is a schematic structural diagram of a radio frequency front - end module in the prior art;

[0040] Figure 2 is one of the schematic structural diagrams of the radio frequency front - end module provided by the present invention;

[0041] Figure 3 is the second schematic structural diagram of the radio frequency front - end module provided by the present invention;

[0042] Figure 4 is a principle block diagram of a voltage detection circuit in the radio frequency front - end module provided by the present invention;

[0043] Figure 5 is a flowchart of a control method for the radio frequency front - end module provided by the present invention;

[0044] Figure 6 is a schematic structural diagram of the antenna system provided by the present invention. Detailed Embodiments

[0045] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without making creative efforts fall within the scope of protection of the present invention.

[0046] The following Figures 2 - 6 describes the radio frequency front - end module and its control method, antenna, antenna system and electronic device of the present invention.

[0047] Figure 2 is one of the schematic structural diagrams of the radio frequency front - end module provided by the present invention. As Figure 2 shown, a radio frequency front - end module includes: a radio frequency interface 201, a transmitting path 202, a receiving path 203, a duplexer 204, a frequency - selecting circuit 205, a voltage detection circuit 206 and a voltage conversion circuit 207.

[0048] Specifically, the radio frequency front - end module may only include one interface for connecting to the host - the radio frequency interface 201. Compared with the traditional radio frequency front - end module, the radio frequency front - end module provided by the embodiments of the present invention combines interfaces by removing the power interface, the control interface and one radio frequency interface, and only retains one radio frequency interface, thus saving a power line, a control line and a radio frequency cable; among the signals transmitted between the host and the radio frequency front - end module, the traditional two - way radio frequency signals, control signals and DC power supply signals are combined into one input signal and transmitted by one radio frequency cable through one interface, realizing interface combination.

[0049] The host can be an electronic device for generating transmission signals and processing received signals. Both the transmission signals and the received signals are radio frequency signals.

[0050] The radio frequency front-end module further includes a transmission path 202, a reception path 203, and a voltage conversion circuit 207.

[0051] The transmission path 202 is used to transmit the transmission signals input by the host.

[0052] The reception path 203 is used to transmit the received signals received by the radio frequency front-end module to the host.

[0053] The voltage conversion circuit 207 is used to perform voltage conversion processing on the DC power supply signal input by the host.

[0054] Optionally, the circuit structures of the transmission path 202, the reception path 203, and the voltage conversion circuit 207 included in the radio frequency front-end module can be the same as the circuit structures of the transmission path, the reception path, and the voltage conversion circuit in a conventional radio frequency front-end module respectively. It can be understood that the circuit structures of the transmission path 202, the reception path 203, and the voltage conversion circuit 207 included in the radio frequency front-end module can also be different from the circuit structures of the transmission path, the reception path, and the voltage conversion circuit in a conventional radio frequency front-end module, as long as the corresponding functions can be realized.

[0055] The radio frequency interface 201 is connected to the transmission path 202 and the reception path 203 respectively through a duplexer 204.

[0056] Specifically, the function of the duplexer 204 is to isolate the transmission signals and the received signals, ensuring that both reception and transmission can work properly simultaneously. The duplexer 204 can be composed of two groups of band-pass filters with different frequencies, preventing the transmission signals of the local machine from being transmitted to the reception path 203 and the received signals of the local machine from being transmitted to the transmission path 202.

[0057] Through the duplexer 204, the transmission signals and the received signals can be transmitted through a single radio frequency cable.

[0058] The radio frequency interface 201 is also connected to the voltage conversion circuit 207 through a frequency selection circuit 205 and a voltage detection circuit 206 in sequence; the voltage conversion circuit 207 is connected to the transmission path 202 and the reception path 203 respectively; the voltage detection circuit 206 is also connected to the transmission path 202.

[0059] Specifically, the radio frequency interface 201, the frequency selection circuit 205, the voltage detection circuit 206, and the voltage conversion circuit 207 are connected in sequence.

[0060] The frequency selection circuit 205 is used to transmit the DC power supply signal in the signals input by the host to the radio frequency front-end module to the voltage detection circuit 206.

[0061] The frequency of the DC power supply signal is 0, while the transmitting signal and the receiving signal have different frequencies and both frequencies are not 0. Therefore, the frequency selection circuit 205 can obtain the DC signal in the signal of the host input radio frequency front-end module to obtain the DC power supply signal.

[0062] The voltage conversion circuit 207 is connected to the receiving path 203 and is used to supply a voltage with a third voltage value to the receiving path 203.

[0063] The voltage conversion circuit 207 is connected to the transmitting path 202 and is used to supply a voltage with a second voltage value to the transmitting path 202.

[0064] The voltage detection circuit 206 is connected to the transmitting path 202 and is used to supply a voltage with a first voltage value to the transmitting path 202.

[0065] The first voltage value is greater than the second voltage value, and the second voltage value is greater than the third voltage value.

[0066] The first voltage value, the second voltage value, and the third voltage value can be determined according to actual needs. For the specific values of the first voltage value, the second voltage value, and the third voltage value, the embodiments of the present invention do not make specific limitations. Exemplarily, the first voltage value, the second voltage value, and the third voltage value are +28V, +5V, and +3.3V respectively.

[0067] The radio frequency interface 201 is used to connect to the host.

[0068] Specifically, the radio frequency front-end module can be connected to the host through the radio frequency interface 201 and a radio frequency cable.

[0069] The voltage detection circuit 206 is used to detect the power supply voltage of the host to the radio frequency front-end module, and based on the power supply voltage, control the opening and closing states of the transmitting path 202 and the receiving path 203.

[0070] Specifically, in the embodiments of the present invention, three working states of the radio frequency front-end module are distinguished by the voltage value of the DC power supply signal: a. The state where both transmission and reception are turned on, and the power supply voltage is the first voltage value (generally +28V); b. The state where only reception works, and the power supply voltage is the second voltage value (generally +5V); c. The state where the module is turned off, and the power supply voltage is 0V.

[0071] The transmitting path 202 can work normally at the first voltage value, and the transmitting path 202 cannot work normally at the second voltage value; the receiving path 203 can work normally at the third voltage value.

[0072] The voltage detection circuit 206 can detect the power supply voltage of the host to the radio frequency front-end module (i.e., the voltage of the DC power supply signal).

[0073] The voltage detection circuit 206 can be implemented in various ways. For example, the specific circuit structure of the voltage detection circuit 206 can be any common circuit structure that can achieve voltage detection.

[0074] Based on the supply voltage, the voltage detection circuit 206 can output different voltages to the voltage conversion circuit 207 to control the open and closed states of the transmission path 202 and the reception path 203.

[0075] Optionally, when the supply voltage is the first voltage value, both the transmission path and the reception path can be controlled to be in the open state; when the supply voltage is the second voltage value, the transmission path can be controlled to be in the closed state and the reception path can be controlled to be in the open state; when the supply voltage is zero, both the transmission path and the reception path can be controlled to be in the closed state.

[0076] In the embodiment of the present invention, by connecting to the host only through one radio frequency interface and one radio frequency cable, the duplexer is used to transmit the transmitted signal and the received signal through one radio frequency cable, the frequency selection circuit separates the DC power supply signal in the input signal transmitted through the radio frequency cable, and the voltage detection circuit controls the open and closed states of the transmission path and the reception path according to the detected voltage of the DC power supply signal. On the premise of ensuring the normal operation of the radio frequency front-end module, that is, three working states can be achieved, the interface of the radio frequency front-end module and the cable connecting to the host can be simplified, and the wiring of the antenna system is simpler, the cost is lower, and the power consumption is lower.

[0077] Figure 3 This is the second schematic diagram of the structure of the radio frequency front-end module provided by the present invention. Based on the content of the above embodiment, as Figure 3 shown, the frequency selection circuit includes a first inductor L1.

[0078] Specifically, the DC signal in the input signal can be obtained through the first inductor L1 to obtain the DC power supply signal.

[0079] In the embodiment of the present invention, frequency selection is performed through the first inductor to obtain the DC power supply signal, and the circuit structure is simpler and the cost is lower.

[0080] Based on the content of the above embodiment, as Figure 3 shown, the transmission path 202 includes: a first amplifier 301, a first filter 302, a second amplifier 303, and a third amplifier 304 connected in sequence; the first amplifier 301 is connected to the duplexer 204; the third amplifier 304 is also used to connect to the radiation unit.

[0081] Specifically, the transmitting path 202 may include a first amplifier 301, a first filter 302, a second amplifier 303, and a third amplifier 304. The first amplifier 301, the first filter 302, the second amplifier 303, and the third amplifier 304 are connected in sequence. The input end of the first amplifier 301 is connected to the duplexer 204, and the output end is connected to the first filter 302. The output end of the third amplifier 304 is used to connect to the radiation unit.

[0082] The first amplifier 301, the second amplifier 303, and the third amplifier 304 serve as a pre-amplifier, a driver amplifier, and a final power amplifier, respectively.

[0083] Appropriate types of amplifiers can be selected as the first amplifier 301, the second amplifier 303, and the third amplifier 304 based on the operating voltages and operating currents of the first amplifier 301, the second amplifier 303, and the third amplifier 304. The present invention embodiment does not specifically limit the operating voltages and operating currents of the first amplifier 301, the second amplifier 303, and the third amplifier 304. The operating voltage of the first amplifier 301 is a first voltage value, and the operating voltages of the second amplifier 303 and the third amplifier 304 are a second voltage value.

[0084] Exemplarily, the operating voltages of the first amplifier 301, the second amplifier 303, and the third amplifier 304 can be +5V, +5V, and +28V respectively, and the operating currents of the first amplifier 301, the second amplifier 303, and the third amplifier 304 can be 65mA, 1.5A, and 3.5A respectively.

[0085] The transmitting path provided by the embodiment of the present invention can improve the signal transmitting performance of the RF transmitting front end.

[0086] Based on the content of the above embodiment, as Figure 3 shown, the receiving path 203 includes: a first low-noise amplifier 305, a second filter 306, a second low-noise amplifier 307, a coupler 308, and a third low-noise amplifier 309 that are connected in sequence; the third low-noise amplifier 309 is connected to the duplexer 204; the first low-noise amplifier 305 is also used to connect to the radiation unit.

[0087] Specifically, the receiving path 203 may include a first low-noise amplifier 305, a second filter 306, a second low-noise amplifier 307, a coupler 308, and a third low-noise amplifier 309. The first low-noise amplifier 305, the second filter 306, the second low-noise amplifier 307, the coupler 308, and the third low-noise amplifier 309 are connected in sequence. The output terminal of the third low-noise amplifier 309 is connected to the duplexer 204, and the input terminal is connected to the coupler 308. The input terminal of the first low-noise amplifier 305 is used to connect to the radiation unit.

[0088] Based on the operating voltages and operating currents of the first low-noise amplifier 305, the second low-noise amplifier 307, and the third low-noise amplifier 309, appropriate models of LNAs can be selected as the first low-noise amplifier 305, the second low-noise amplifier 307, and the third low-noise amplifier 309 respectively. The present invention embodiment does not specifically limit the operating voltages and operating currents of the first low-noise amplifier 305, the second low-noise amplifier 307, and the third low-noise amplifier 309. The operating voltages of the first low-noise amplifier 305, the second low-noise amplifier 307, and the third low-noise amplifier 309 are the third voltage value.

[0089] Exemplarily, the operating voltages of the first low-noise amplifier 305, the second low-noise amplifier 307, and the third low-noise amplifier 309 may all be +3.3V, and the operating currents of the first low-noise amplifier 305, the second low-noise amplifier 307, and the third low-noise amplifier 309 may all be 15 mA.

[0090] Based on the coupling degree of the coupler 308, an appropriate model of the coupler can be selected as the coupler 308. The present invention embodiment does not specifically limit the coupling degree of the coupler 308. Exemplarily, the coupling degree of the coupler 308 may be 3 dB.

[0091] The receiving path provided by the present invention embodiment can improve the signal receiving performance of the RF transmitting front end.

[0092] Based on the content of the above embodiment, as Figure 3 shown, the voltage conversion circuit 207 includes: a DC-DC converter 310 and a low-dropout linear regulator 311.

[0093] Specifically, the voltage conversion circuit 207 may include a DC-DC converter 310 and a low-dropout linear regulator 311. The DC-DC converter 310 and the low-dropout linear regulator 311 are connected.

[0094] The first terminal of the DC-DC converter 310 is connected to the first output terminal of the voltage detection circuit 206; the second terminal of the DC-DC converter is respectively connected to the second output terminal of the voltage detection circuit 206, the input terminal of the low dropout linear regulator 311, the first amplifier 301 and the second amplifier 303; the first output terminal of the voltage detection circuit 206 is further connected to the third amplifier 304.

[0095] Specifically, the first terminal (i.e., the input terminal) of the DC-DC converter 310 is connected to the first output terminal of the voltage detection circuit 206. The first output terminal of the voltage detection circuit 206 is further connected to the third amplifier 304.

[0096] The voltage value of the output voltage of the first output terminal of the voltage detection circuit 206 is the first voltage value. The voltage detection circuit 206 can provide the voltage of the first voltage value to the third amplifier 304 and the DC-DC converter 310.

[0097] The DC-DC converter 310 can convert the input voltage with the voltage value of the first voltage value into an output voltage with the voltage value of the second voltage value.

[0098] The second terminal (i.e., the output terminal) of the DC-DC converter 310 is respectively connected to the second output terminal of the voltage detection circuit 206, the input terminal of the low dropout linear regulator 311, the first amplifier 301 and the second amplifier 303.

[0099] The DC-DC converter 310 can provide the voltage of the second voltage value to the input terminal of the low dropout linear regulator 311, the first amplifier 301 and the second amplifier 303.

[0100] The second terminal of the DC-DC converter is connected to the second output terminal of the voltage detection circuit 206, that is, the second output terminal of the voltage detection circuit 206 is connected to the input terminal of the low dropout linear regulator 311.

[0101] The voltage value of the output voltage of the second output terminal of the voltage detection circuit 206 is the second voltage value. The first output terminal and the second output terminal of the voltage detection circuit 206 do not output voltage simultaneously.

[0102] The second output terminal of the voltage detection circuit 206 can also provide the voltage of the second voltage value to the input terminal of the low dropout linear regulator 311.

[0103] The output terminal of the low dropout linear regulator 311 is respectively connected to the first low noise amplifier 305, the second low noise amplifier 307 and the third low noise amplifier 309.

[0104] Specifically, the low dropout linear regulator 311 can convert an input voltage with a second voltage value into an output voltage with a third voltage value.

[0105] The output terminal of the low dropout linear regulator 311 is respectively connected to the first low noise amplifier 305, the second low noise amplifier 307, and the third low noise amplifier 309. The low dropout linear regulator 311 provides a voltage with a third voltage value to the first low noise amplifier 305, the second low noise amplifier 307, and the third low noise amplifier 309.

[0106] The voltage detection circuit 206 can be implemented based on transistors such as field effect transistors, bipolar junction transistors, or diodes, that is, the voltage detection circuit 206 can include transistors such as field effect transistors, bipolar junction transistors, or diodes. For different supply voltages of the DC power supply signal, the transistors included in the voltage detection circuit 206 can exhibit different on-off states, so that the supply voltage of the DC power supply signal can be detected according to the on-off states of the transistors included in the voltage detection circuit 206.

[0107] Figure 4 is a principle block diagram of the voltage detection circuit in the radio frequency front-end module provided by the present invention. Exemplarily, as Figure 4 shown, the voltage detection circuit 206 mainly includes a first N-channel enhancement mode metal-oxide-semiconductor field-effect transistor (MOSFET, Metal-Oxide-Semiconductor Field-Effect-Transistor, MOS transistor) V1, a second N-channel enhancement mode metal-oxide-semiconductor field-effect transistor V3, a first P-channel enhancement mode metal-oxide-semiconductor field-effect transistor V2, and a second P-channel enhancement mode metal-oxide-semiconductor field-effect transistor V4. The supply voltage of the DC power supply signal can be detected through the on-off states of the above 4 MOS transistors.

[0108] The connection relationship between the MOS transistor V1, the MOS transistor V2, the MOS transistor V3, and the MOS transistor V4, that is, the resistance values of the resistors included in the voltage detection circuit 206 are as Figure 4 shown. The source of the MOS transistor V2 is the first output terminal of the voltage detection circuit 206 and is connected to the first terminal of the DC-DC converter 310; the source of the MOS transistor V4 is the second output terminal of the voltage detection circuit 206 and is connected to the input terminal of the low dropout linear regulator (i.e., LDO) 311, that is, connected to the second terminal of the DC-DC converter 310.

[0109] When the supply voltage is +28V, the voltage at the gate of MOS transistor V1 is 28V × 0.12 = 3.4V, which is greater than the turn-on voltage of MOS transistor V1, 2.1V. MOS transistor V1 conducts, and MOS transistor V2 also conducts. The supply voltage is output from the source of MOS transistor V2, and +5V and 3.3V are output from +28V through DC-DC converter 310 and LDO 311; MOS transistors V3 and V4 do not conduct. When the supply voltage is +5V, the voltage at the gate of MOS transistor V1 is 5V × 0.12 = 0.6V, which is less than the turn-on voltage of MOS transistor V1, 2.1V. MOS transistor V1 does not conduct, and MOS transistor V2 also does not conduct; MOS transistors V3 and V4 conduct, and the supply voltage is output from the source of MOS transistor V4. Also, the output from the source of MOS transistor V3 can be used as the enable EN signal.

[0110] The voltage conversion circuit provided by the embodiment of the present invention can improve the accuracy and stability of power supply to each amplifier.

[0111] Figure 5 It is a flowchart of the control method for the radio frequency front-end module provided by the present invention. As Figure 5 shown, a control method for a radio frequency front-end module includes: step 501, step 502, and step 503.

[0112] Specifically, the control method for the radio frequency front-end module provided by the embodiment of the present invention is used to control the radio frequency front-end module provided by any of the above radio frequency front-end module embodiments.

[0113] Step 501: The frequency selection circuit transmits the DC power supply signal in the signal input by the host to the radio frequency front-end module to the voltage detection circuit.

[0114] Specifically, in the case where the radio frequency front-end module is connected to the host through a radio frequency interface and a radio frequency line, the frequency selection circuit can obtain the DC signal in the signal input by the host to the radio frequency front-end module through frequency selection processing of the signal input by the host to the radio frequency front-end module, and obtain the DC power supply signal.

[0115] The input end of the frequency selection circuit is connected to the radio frequency interface, and the output end of the frequency selection circuit is connected to the input end of the voltage detection circuit. Therefore, the DC power supply signal obtained by the frequency selection circuit can be input to the voltage detection circuit through the output end of the frequency selection circuit.

[0116] Step 502: The voltage detection circuit detects the voltage of the DC power supply signal to obtain the supply voltage.

[0117] Specifically, the voltage detection circuit can detect the voltage of the DC power supply signal through the voltage detection method that can be realized by its circuit structure to obtain the supply voltage.

[0118] Step 503: The voltage detection circuit controls the opening and closing states of the transmitting path and the receiving path based on the supply voltage.

[0119] Specifically, the voltage detection circuit controls the opening and closing states of the transmitting path and the receiving path based on the supply voltage, implementing three operating states of the RF front-end module: the simultaneous transmitting and receiving open state, the receive-only operating state, and the module closed state.

[0120] In the embodiment of the present invention, the DC power supply signal in the input signal transmitted through the RF cable is separated by the frequency selection circuit, and the voltage detection circuit controls the opening and closing states of the transmitting path and the receiving path according to the detected voltage of the DC power supply signal. On the premise of ensuring the normal operation of the RF front-end module, that is, three operating states can be realized, the interface of the RF front-end module and the cable connected to the host can be simplified, and the wiring of the antenna system is simpler, the cost is lower, and the power consumption is lower.

[0121] Based on the content of any of the above embodiments, the voltage detection circuit controls the opening and closing states of the transmitting path and the receiving path based on the supply voltage, specifically including: when the supply voltage is the first voltage value, controlling both the transmitting path and the receiving path to be in the open state.

[0122] Specifically, when the supply voltage is the first voltage value and the condition for the normal operation of the transmitting path is met, the voltage detection circuit can supply power to the transmitting path through itself and the voltage conversion circuit, so that the transmitting path is in the open state; the voltage detection circuit can supply power to the receiving path through the voltage conversion circuit, and the receiving path is in the open state; thus, the RF front-end module is in the simultaneous transmitting and receiving open state.

[0123] Exemplarily, when the supply voltage is the first voltage value, Figure 3 the third amplifier in can operate normally, thus meeting the condition for the normal operation of the transmitting path.

[0124] When the supply voltage is the second voltage value, control the transmitting path to be in the closed state and control the receiving path to be in the open state; where the first voltage value is greater than the second voltage value.

[0125] Specifically, when the supply voltage is the second voltage value and the condition for the normal operation of the transmitting path is not met, the voltage detection circuit does not supply power to the transmitting path through itself and the voltage conversion circuit, so that the transmitting path is in the closed state; the voltage detection circuit can supply power to the receiving path through the voltage conversion circuit, and the receiving path is in the open state; thus, the RF front-end module is in the receive-only operating state.

[0126] Exemplarily, when the supply voltage is the second voltage value, even if the voltage detection circuit supplies power to the transmitting path through itself and the voltage conversion circuit, Figure 3The third amplifier in also fails to work properly, thus not meeting the conditions for the normal operation of the transmitting path.

[0127] When the supply voltage is zero, both the transmitting path and the receiving path are controlled to be in the off state.

[0128] Specifically, when the supply voltage is zero, the conditions for the normal operation of the transmitting path are not met, nor are the conditions for the normal operation of the receiving path. The voltage detection circuit does not supply power to the transmitting path through itself and the voltage conversion circuit, causing the transmitting path to be in the off state. The voltage detection circuit also does not supply power to the receiving path through the voltage conversion circuit, and the receiving path is in the off state; thus, the RF front-end module is in the module-off state.

[0129] In the embodiment of the present invention, the voltage detection circuit controls the opening and closing states of the transmitting path and the receiving path according to the detected voltage of the DC supply signal. On the premise of ensuring the normal operation of the RF front-end module, that is, three working states can be achieved, the interface of the RF front-end module and the cable connected to the host can be simplified, and the wiring of the antenna system is simpler, the cost is lower, and the power consumption is lower.

[0130] Based on the content of any of the above embodiments, an antenna includes an RF front-end module and a radiation unit connected to the RF front-end module.

[0131] Specifically, the RF front-end module included in the antenna can be the RF front-end module provided by any of the above RF front-end module embodiments.

[0132] The transmitting path and the receiving path of the RF front-end module can be connected to the same radiation unit or different radiation units.

[0133] The transmitting path can transmit the transmission signal input by the host through the radiation unit.

[0134] The received signal received by the radiation unit can be transmitted to the host through the receiving path.

[0135] The working process of this antenna can refer to any of the above embodiments of the RF front-end module or any of the embodiments of the control method of the RF front-end module, and will not be elaborated here.

[0136] In the embodiment of the present invention, by connecting to the host only through one RF interface and one RF cable, on the premise of ensuring the normal operation of the RF front-end module, that is, three working states can be achieved, the interface of the RF front-end module and the cable connected to the host can be simplified, and the wiring of the antenna system is simpler, the cost is lower, and the power consumption is lower.

[0137] Figure 6 is a schematic structural diagram of the antenna system provided by the present invention. Based on the content of any of the above embodiments, as Figure 6As shown in the figure, an antenna system includes: an antenna 601 and a host 602; the radio frequency front-end module 6011 in the antenna 601 is connected to the host 602 through a radio frequency cable 603.

[0138] Specifically, the antenna 601 can be the antenna provided by the above antenna embodiment.

[0139] The radio frequency interface of the radio frequency front-end module 6011 is connected to the host 602 through a radio frequency cable 603 to transmit radio frequency signals and DC power supply signals.

[0140] The working process of this antenna system can refer to the embodiments of any of the foregoing radio frequency front-end modules or the embodiments of the control method of any radio frequency front-end module, which will not be elaborated here.

[0141] In the embodiment of the present invention, the radio frequency front-end module (antenna) is connected to the host only through one radio frequency interface and one radio frequency cable. On the premise of ensuring the normal operation of the radio frequency front-end module, that is, three working states can be realized, the interface of the radio frequency front-end module and the cable connected to the host can be simplified, the wiring of the antenna system is simpler, the cost is lower, and the power consumption is lower.

[0142] Based on the content of any of the above embodiments, an electronic device includes: an antenna system.

[0143] Specifically, the electronic device can be an electronic device for satellite communication (which can be simply referred to as a "satellite communication device").

[0144] The antenna system included in the electronic device can be the antenna system provided by the above antenna system embodiment.

[0145] The working process of this electronic device can refer to the embodiments of any of the foregoing radio frequency front-end modules or the embodiments of the control method of any radio frequency front-end module, which will not be elaborated here.

[0146] In the embodiment of the present invention, the radio frequency front-end module (antenna) is connected to the host only through one radio frequency interface and one radio frequency cable. On the premise of ensuring the normal operation of the radio frequency front-end module, that is, three working states can be realized, the interface of the radio frequency front-end module and the cable connected to the host can be simplified, the wiring of the antenna system is simpler, the cost is lower, and the power consumption is lower. The internal wiring of the electronic device is simpler, the cost is lower, and the power consumption is lower.

[0147] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; 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 present invention.

Claims

1. A radio frequency front-end module, characterized in that, Comprising: A radio frequency interface, a transmitting path, a receiving path, a duplexer, a frequency selection circuit, a voltage detection circuit, and a voltage conversion circuit; The radio frequency interface is connected to the transmitting path and the receiving path respectively through the duplexer; The radio frequency interface is further connected to the voltage conversion circuit through the frequency selection circuit and the voltage detection circuit in sequence; the voltage conversion circuit is connected to the transmitting path and the receiving path respectively; the voltage detection circuit is further connected to the transmitting path; The radio frequency interface is used to connect to a host; The voltage detection circuit is used to detect the power supply voltage of the host to the radio frequency front-end module, and based on the power supply voltage, control the opening and closing states of the transmitting path and the receiving path; The voltage detection circuit controls the opening and closing states of the transmitting path and the receiving path based on the power supply voltage, specifically including: When the power supply voltage is a first voltage value, control both the transmitting path and the receiving path to be in an open state; When the power supply voltage is a second voltage value, control the transmitting path to be in a closed state and control the receiving path to be in an open state; When the power supply voltage is zero, control both the transmitting path and the receiving path to be in a closed state; Wherein, the first voltage value is greater than the second voltage value.

2. The radio frequency front-end module according to claim 1, characterized in that The frequency selection circuit includes a first inductor.

3. The radio frequency front-end module according to claim 1, characterized in that, The transmitting path includes: a first amplifier, a first filter, a second amplifier, and a third amplifier connected in sequence; the first amplifier is connected to the duplexer; The third amplifier is further used to connect to a radiation unit.

4. The radio frequency front-end module according to claim 3, wherein, The receiving path includes: a first low-noise amplifier, a second filter, a second low-noise amplifier, a coupler, and a third low-noise amplifier connected in sequence; the third low-noise amplifier is connected to the duplexer; The first low-noise amplifier is further used to connect to the radiation unit.

5. The radio frequency front-end module according to claim 4, wherein The voltage conversion circuit includes: a DC-DC converter and a low-dropout linear regulator; The first end of the DC-DC converter is connected to the first output end of the voltage detection circuit; the second end of the DC-DC converter is connected to the second output end of the voltage detection circuit, the input end of the low-dropout linear regulator, the first amplifier, and the second amplifier respectively; the first output end of the voltage detection circuit is further connected to the third amplifier; The output end of the low-dropout linear regulator is connected to the first low-noise amplifier, the second low-noise amplifier, and the third low-noise amplifier respectively.

6. A control method for a radio frequency front-end module according to any one of claims 1 to 5, characterized in that, Comprising: The frequency selection circuit transmits the DC power supply signal in the signal input by the host to the radio frequency front-end module to the voltage detection circuit; The voltage detection circuit detects the voltage of the DC power supply signal to obtain the power supply voltage; The voltage detection circuit controls the opening and closing states of the transmitting path and the receiving path based on the power supply voltage.

7. An antenna, characterized in that, Comprising: The radio frequency front-end module as described in any one of claims 1 to 5 and a radiation unit connected to the radio frequency front-end module.

8. An antenna system, characterized in that, Comprising: The antenna and the host as described in claim 7; the radio frequency front-end module in the antenna is connected to the host through a radio frequency cable.

9. An electronic device, characterized in that, Comprising: The antenna system according to claim 8.

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