CN116707556A - Module for adjusting transmitting power, radio frequency front end module and wireless transmitting equipment - Google Patents
Module for adjusting transmitting power, radio frequency front end module and wireless transmitting equipment Download PDFInfo
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- CN116707556A CN116707556A CN202310963563.XA CN202310963563A CN116707556A CN 116707556 A CN116707556 A CN 116707556A CN 202310963563 A CN202310963563 A CN 202310963563A CN 116707556 A CN116707556 A CN 116707556A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B2001/0408—Circuits with power amplifiers
- H04B2001/0416—Circuits with power amplifiers having gain or transmission power control
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention belongs to the technical field of radio frequency, and discloses a module for adjusting transmitting power, a radio frequency front-end module and wireless transmitting equipment, wherein the module for adjusting transmitting power comprises a signal receiving end, a low-noise amplifier, a signal coupler, a signal output end, a coupled signal amplifier, a rectifying module, a first transistor, a second transistor, a first switch, a capacitor, a second switch, a third transistor, a fourth transistor and an adjustable resistor module. The module for adjusting the transmitting power can not only adjust the transmitting power of the power amplifier in the radio frequency front end module, so that the power amplifier can not always transmit with the maximum power, thereby reducing radiation, reducing power consumption and heating value, prolonging service life, and enabling the implementation process to be simpler.
Description
Technical Field
The present invention relates to the field of radio frequency technologies, and in particular, to a module for adjusting transmission power, a radio frequency front end module, and a wireless transmitting device.
Background
The radio frequency front end module 100 of the time division communication system (TDD) mainly includes a power amplifying component 101 for amplifying a radio frequency signal output (TX) of a radio frequency chip, a receiving circuit component 102 for Receiving (RX) signal paths, a radio frequency switch component 103 for switching between transmitting and receiving paths, and a logic control component (not shown) for controlling the operation states of other components. The receiving circuit assembly typically includes a Low Noise Amplifier (LNA), and the switch common of the switch assembly is connected to an Antenna (ANT), as shown in fig. 1.
In the related art radio frequency architecture, the control of the output power of the power amplifier of the transmitter is often realized by a main chip, and software and hardware are required to cooperate together, so that the realization process is complex, and correspondingly, the radio frequency front end module cannot independently complete the control function of the transmitting power.
In some wireless products, such as WIFI routers, WIFI terminal devices, etc., the system often has no control function of the transmitting power, so that the wireless products always transmit with the maximum power when working, thereby causing the problems of large radiation, high power consumption, serious heat generation and short service life.
Disclosure of Invention
The invention aims to provide a module for adjusting transmitting power, a radio frequency front-end module and wireless transmitting equipment, so as to solve the problems that a wireless product in the related art cannot independently complete the control function of the transmitting power, and therefore the wireless product is large in radiation, high in power consumption, serious in heating and short in service life.
In order to solve the above technical problems, in a first aspect, the present invention provides a module for adjusting transmit power, which includes a signal receiving end, a low noise amplifier, a signal coupler, a signal output end, a coupled signal amplifier, a rectifying module, a first transistor, a second transistor, a first switch, a capacitor, a second switch, a third transistor, a fourth transistor, and an adjustable resistor module;
the signal receiving end is used for receiving radio frequency signals, the input end of the low noise amplifier is connected to the signal receiving end, the input end of the signal coupler is connected to the output end of the low noise amplifier, and the signal output end is connected to the first output end of the signal coupler and used for outputting first coupling radio frequency signals coupled through the signal coupler;
the input end of the coupled signal amplifier is connected to the second output end of the signal coupler and is used for accessing a second coupled radio frequency signal coupled by the signal coupler, and the input end of the rectifying module is connected to the output end of the coupled signal amplifier;
the input end of the first transistor is connected to the output end of the rectifying module, the first output end of the first transistor is connected to the power supply voltage, and the second output end of the first transistor is grounded;
a first input end of the second transistor is connected to a first output end of the first transistor, a first output end of the second transistor is connected to the power supply voltage, and a second output end of the second transistor is grounded;
a first end of the first switch is connected to a second output end of the second transistor, and the first switch is controlled to be turned on and off by receiving an enabling signal;
a first end of the capacitor is connected to a second end of the first switch, and a second end of the capacitor is grounded;
the input end of the second switch is connected to the second end of the first switch, the second output end of the second switch is suspended, the third output end of the second switch is grounded, and the second switch realizes the communication between the input end of the second switch and the first output end of the second switch, or the second output end of the second switch, or the third output end of the second switch through the control of the receiving enabling signal and the transmitting enabling signal;
an input terminal of the third transistor is connected to a first output terminal of the second switch, and a first output terminal of the third transistor is connected to the power supply voltage;
a first input end of the fourth transistor is connected to a second output end of the third transistor, a first output end of the fourth transistor is connected to a first output end of the third transistor, and a second output end of the fourth transistor is grounded;
the input end of the adjustable resistor module is connected to the second output end of the fourth transistor, the output end of the adjustable resistor module is connected to the input end of the power amplifier of the radio frequency front end module, and the control end of the adjustable resistor module is connected to the output end of the power amplifier.
Preferably, the first transistor is a first triode; the base electrode of the first triode is used as a first input end of the first transistor, the collector electrode of the first triode is used as a first output end of the first transistor, and the emitter electrode of the first triode is used as a second output end of the first transistor;
the second transistor is a second triode; the base electrode of the second triode is used as a first input end of the second transistor, the collector electrode of the second triode is used as a first output end of the second transistor, and the emitter electrode of the second triode is used as a second output end of the second transistor;
the third transistor is a third triode; the base electrode of the third triode is used as a first input end of the third transistor, the collector electrode of the third triode is used as a first output end of the third transistor, and the emitter electrode of the third triode is used as a second output end of the third transistor;
the fourth transistor is a fourth triode; the base electrode of the fourth triode is used as a first input end of the fourth transistor, the collector electrode of the fourth triode is used as a first output end of the fourth transistor, and the emitter electrode of the fourth triode is used as a second output end of the fourth transistor.
Preferably, the module for adjusting the transmitting power further comprises a first resistor, a second resistor, a third resistor and a fourth resistor;
a first end of the first resistor is connected to the output end of the rectifying module, and a second end of the first resistor is connected to the power supply voltage;
the first end of the second resistor is connected to the output end of the rectifying module, and the second end of the second resistor is grounded;
two ends of the third resistor are respectively connected to the second end of the first resistor and the collector electrode of the first triode;
and two ends of the fourth resistor are respectively connected to the second end of the second resistor and the emitter of the first triode.
Preferably, the module for adjusting the transmitting power further comprises a fifth resistor and a sixth resistor;
two ends of the fifth resistor are respectively connected to the collector electrode of the first triode and the base electrode of the second triode;
the first end of the sixth resistor is connected to the emitter of the second triode, and the second end of the sixth resistor is grounded.
Preferably, the module for adjusting the transmitting power further comprises a seventh resistor; the first output end of the second switch is connected to the base electrode of the third triode after being connected with the seventh resistor in series.
Preferably, the module for adjusting the transmitting power further comprises an eighth resistor; the first end of the eighth resistor is connected to the emitter of the fourth triode, and the second end of the eighth resistor is grounded.
Preferably, the module for adjusting the transmitting power further comprises a ninth resistor; and the emitter of the fourth triode is connected to the input end of the adjustable resistor module after being connected with the ninth resistor in series.
Preferably, the adjustable resistance module is a triode or a field effect transistor.
In a second aspect, the present invention provides a radio frequency front end module, which includes a module for adjusting transmit power as described above.
In a third aspect, the present invention provides a wireless transmitting device, which includes a radio frequency front end module as described above.
Compared with the related art, the module for adjusting the transmitting power is characterized in that the signal receiving end, the low-noise amplifier, the signal coupler, the signal output end, the coupling signal amplifier, the rectifying module, the first transistor, the second transistor, the first switch, the capacitor, the second switch, the third transistor, the fourth transistor and the adjustable resistance module are additionally arranged at the input end and the output end of the power amplifier of the radio frequency front end module, so that the resistance value of the adjustable resistance module can be changed through the cooperation of the devices to adjust the gain of the power amplifier, namely, the transmitting power of the power amplifier is adjusted, so that the power amplifier can not always transmit at the maximum power, the radiation is reduced, the power consumption and the heating value are reduced, the service life is prolonged, meanwhile, the control function of the module for adjusting the transmitting power can be completed without the participation of a main chip, the realization process is simpler, and the automatic adjustment can be realized according to the received radio frequency signal intensity.
Drawings
For a clearer description of the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the description below are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art, wherein:
fig. 1 is a circuit structure diagram of a radio frequency front end module provided in the related art;
fig. 2 is a circuit structure diagram of a module for adjusting transmission power according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The embodiment of the invention provides a module 200 for adjusting transmitting power, which is shown in fig. 2, and includes a signal receiving end RFin, a low noise amplifier 201, a signal coupler 202, a signal output end RFout, a coupled signal amplifier 203, a rectifying module 204, a first transistor Q1, a second transistor Q2, a first switch S1, a capacitor C, a second switch S2, a third transistor Q3, a fourth transistor Q4, and an adjustable resistor module 205.
The signal receiving terminal RFin is configured to receive a radio frequency signal, an input terminal of the low noise amplifier 201 is connected to the signal receiving terminal RFin, an input terminal of the signal coupler 202 is connected to an output terminal of the low noise amplifier 201, and a signal output terminal RFout is connected to a first output terminal of the signal coupler 202, and is configured to output a first coupled radio frequency signal coupled by the signal coupler 202.
An input terminal of the coupled signal amplifier 203 is connected to a second output terminal of the signal coupler 202 for accessing a second coupled radio frequency signal coupled via the signal coupler 202, and an input terminal of the rectifying module 204 is connected to an output terminal of the coupled signal amplifier 203.
The input terminal of the first transistor Q1 is connected to the output terminal of the rectifying module 204, the first output terminal of the first transistor Q1 is connected to the power voltage VCC, and the second output terminal of the first transistor Q1 is grounded.
The first input terminal of the second transistor Q2 is connected to the first output terminal of the first transistor Q1, the first output terminal of the second transistor Q2 is connected to the power supply voltage VCC, and the second output terminal of the second transistor Q2 is grounded.
The first terminal of the first switch S1 is connected to the second output terminal of the second transistor Q2, and the first switch S1 is controlled to be turned on and off by receiving an enable signal. In this embodiment, the first switch S1 is a single pole single throw switch, and of course, other types of switches may be selected according to actual needs.
The first end of the capacitor C is connected to the second end of the first switch S1, and the second end of the capacitor C is grounded.
The input end of the second switch S2 is connected to the second end of the first switch S1, the second input end of the second switch S2 is suspended, the third output end of the second switch S2 is grounded, and the input end of the second switch S2 is connected with the first output end of the second switch S2 or the second output end of the second switch S2 or the third output end of the second switch S2 through control of receiving an enabling signal and transmitting an enabling signal. In this embodiment, the first switch S1 is a single pole three throw switch, and of course, other types of switches may be used according to actual needs.
An input terminal of the third transistor Q3 is connected to the first output terminal of the second switch S2, and a first output terminal of the third transistor Q3 is connected to the power supply voltage VCC.
The first input terminal of the fourth transistor Q4 is connected to the second output terminal of the third transistor Q3, the first output terminal of the fourth transistor Q4 is connected to the first output terminal of the third transistor Q3, and the second output terminal of the fourth transistor Q4 is grounded.
The input end of the adjustable resistor module 205 is connected to the second output end of the fourth transistor Q4, the output end of the adjustable resistor module 205 is connected to the input end of the power amplifier 206 of the rf front-end module, and the control end of the adjustable resistor module 205 is connected to the output end of the power amplifier 206.
The adjustable resistance module 205 may be an adjustable attenuator or other devices capable of adjusting resistance, and the like, and further includes a ground terminal for grounding and a power terminal for accessing a power supply; the output signal of the power amplifier 206 may be used as an external control signal of the adjustable resistor module 205, that is, the resistance value of the adjustable resistor module 205 may be adjusted by the output signal of the power amplifier 206.
In this embodiment, the first transistor Q1 is a first triode; the base of the first triode is used as the first input end of the first transistor Q1, the collector of the first triode is used as the first output end of the first transistor Q1, and the emitter of the first triode is used as the second output end of the first transistor Q1.
The second transistor Q2 is a second triode; the base electrode of the second triode is used as the first input end of the second transistor Q2, the collector electrode of the second triode is used as the first output end of the second transistor Q2, and the emitter electrode of the second triode is used as the second output end of the second transistor Q2.
The third transistor Q3 is a third triode; the base of the third transistor is used as the first input end of the third transistor Q3, the collector of the third transistor is used as the first output end of the third transistor Q3, and the emitter of the third transistor is used as the second output end of the third transistor Q3.
The fourth transistor Q4 is a fourth triode; the base of the fourth transistor is used as the first input end of the fourth transistor Q4, the collector of the fourth transistor is used as the first output end of the fourth transistor Q4, and the emitter of the fourth transistor is used as the second output end of the fourth transistor Q4.
Of course, according to actual requirements, the first transistor Q1 to the fourth transistor Q4 may also use field effect transistors, and correspondingly, the gate electrode of the field effect transistor is used as the base electrode of the corresponding triode, the drain electrode of the field effect transistor is used as the collector electrode of the corresponding triode, and the source electrode of the field effect transistor is used as the emitter electrode of the corresponding triode.
In this embodiment, the module 200 for adjusting the transmitting power further includes a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4.
The first end of the first resistor R1 is connected to the output end of the rectifying module 204, and the second end of the first resistor R1 is connected to the power voltage VCC.
The first end of the second resistor R2 is connected to the output end of the rectifying module 204, and the second end of the second resistor R2 is grounded.
Both ends of the third resistor R3 are respectively connected to the second end of the first resistor R1 and the collector of the first triode.
The two ends of the fourth resistor R4 are respectively connected to the second end of the second resistor R2 and the emitter of the first triode.
By adding the first resistor R1 to the fourth resistor R4, a corresponding bias voltage can be provided for the first transistor Q1.
In this embodiment, the module 200 for adjusting the transmission power further includes a fifth resistor R5 and a sixth resistor R6.
Two ends of the fifth resistor R5 are respectively connected to the collector electrode of the first triode and the base electrode of the second triode.
The first end of the sixth resistor R6 is connected to the emitter of the second triode, and the second end of the sixth resistor R6 is grounded.
By adding the fifth resistor R5 and the sixth resistor R6, a corresponding bias voltage can be provided for the second transistor Q2.
In this embodiment, the module 200 for adjusting the transmitting power further includes a seventh resistor R7; the first output end of the second switch S2 is connected to the base electrode of the third triode after being connected in series with a seventh resistor R7.
By adding the seventh resistor R7, the output impedance of the second end of the second switch S2 can be increased.
In this embodiment, the module 200 for adjusting the transmitting power further includes an eighth resistor R8; the first end of the eighth resistor R8 is connected to the emitter of the fourth triode, and the second end of the eighth resistor R8 is grounded.
By adding the eighth resistor R8, a corresponding bias voltage can be provided to the fourth transistor Q4.
In this embodiment, the module 200 for adjusting the transmitting power further includes a ninth resistor R9; the emitter of the fourth triode is connected to the input end of the adjustable resistor module 205 through a ninth resistor R9 in series.
By adding the ninth resistor R9, the output impedance of the fourth transistor Q4 can be increased.
In this embodiment, the adjustable resistor module 205 is a triode or a field effect transistor. Of course, other devices may be used for the adjustable resistor module 205 according to actual requirements.
The working flow of the module 200 for adjusting the transmission power in this embodiment is as follows:
when a radio frequency signal (receiving signal) reaches a radio frequency switch common end of the radio frequency front end module, the switch assembly is switched to a receiving channel under the control of the logic control assembly; when the radio frequency signal reaches the receiving path, the radio frequency signal is transmitted to the low noise amplifier 201, namely, the low noise amplifier 201 in the module 200 for adjusting the transmitting power, and then is amplified by the low noise amplifier 201 and then is transmitted to the signal coupler 202; the first coupled rf signal amplified by the low noise amplifier 201 is output through the signal output end RFout, that is, the main signal of the rf front end module is output through the signal output end RFout; the second rf signal amplified by the low noise amplifier 201 is sent to the coupling signal amplifier 203, i.e. to the internal module of the module 200 for adjusting the transmit power.
When the second coupling radio frequency signal is transmitted to the coupling signal amplifier 203, the second coupling radio frequency signal is amplified by the coupling signal amplifier 203 and transmitted to the rectifying module 204, so that the second coupling radio frequency signal is converted into a direct current voltage (Vrdet) by the rectifying module 204, and the amplitude of the direct current voltage is determined by the power input into the rectifying module 204; the greater the power input to the rectifying module 204, the higher the dc voltage.
When the direct current voltage is output by the rectifying module 204, the direct current voltage is amplified by the first triode, and the second triode is amplified by the current to reach the first switch S1; the first switch S1 is controlled by the reception enable signal, and the reception enable signal is in an enabled state when the system receives and is in a disabled state at other times; when the receiving enable signal is in the enable state, the first switch S1 is in the on state, otherwise, the first switch S1 is in the off state.
The capacitor C is used for storing energy; if the received receiving enabling signal is in an enabling state, the received transmitting enabling signal is in a disabling state, and the input end and the first output end of the second switch S2 are in an on state; if the received receiving enabling signal is in a disabled state, the received transmitting enabling signal is in an enabled state, and the input end and the second output end of the second switch S2 are in an on state; if the received receiving enabling signal is enabled to switch to a disabled transient state, the received transmitting enabling signal is disabled, and the input end and the third output end of the second switch S2 are in an on state; if the received receiving enabling signal is in a disabled state, the received transmitting enabling signal is in a disabled state, and the input end and the second output end of the second switch S2 are in an on state; if the received reception enable signal is in the enable state, the second switch S2 receives the transmission enable signal in the enable state, and the input end of the second switch S2 is not connected to the other ends.
The input end and the first output end of the second switch S2 are in a communication state, so that the second switch S2 can be connected to the base electrode of the third triode; the input end and the second output end of the second switch S2 are in a communication state, so that the second switch S2 can be in a suspended state; the input terminal and the third output terminal of the second switch S2 are in a connected state, so that the second switch S2 can be grounded.
When the input end of the second switch S2 is connected to the first output end, the signal output by the emitter of the second triode is output to the base of the third triode, and the negative feedback control signal of the power amplifier 206 of the rf front-end module is generated through the third triode and the fourth triode, and the negative feedback control signal is output from the emitter of the fourth triode.
After the negative feedback signal is transmitted to the adjustable resistor module 205, the resistance value of the adjustable resistor module 205 can be controlled, so that the gain of the power amplifier 206 of the radio frequency front end module, the input end and the output end of which are respectively connected with the adjustable resistor module 205, is changed, that is, the transmitting power of the power amplifier 206 is adjusted, so that the power amplifier 206 can not always transmit with the maximum power.
The working principle of the module 200 for adjusting the transmitting power in this embodiment is as follows:
in the receiving time slot stage, the receiving enable signal is in an enabling state, the transmitting enable signal is in a disabling state, the radio frequency signal in the stage sequentially passes through the low noise amplifier 201, the coupler and the coupling signal amplifier 203 to reach the rectifying module 204, the radio frequency signal is converted into a direct current voltage signal through the rectifying module 204, the direct current signal is output from the emitter of the second triode after being amplified by the first triode and the second triode, and the direct current signal reaches the first switch S1, at the moment, the first switch S1 is conducted under the action of the receiving enable signal, meanwhile, the second switch S2 is conducted with the first output end under the action of the receiving enable signal and the transmitting enable signal, and the second output end is in a suspended state.
Meanwhile, the capacitor C is charged under the action of the direct-current voltage signal, and after a second of tcarges (in a typical WIFI system, tcarges can be designed from tens of us to hundreds of us), the voltage of the capacitor C is as follows: vc=vrdet.
After t_rx seconds pass (t_rx refers to the duration of the receive slot, in a typical WIFI system, t_rx is usually from tens of us to tens of ms), after the receive state ends, the receive enable signal is in the disable state, and the transmit enable signal is in the disable state; at this time, no radio frequency signal enters, the first switch S1 is turned off, the input end of the second switch S2 is connected to the second output end, and the voltage of the capacitor C remains unchanged.
After t_txdelay seconds (t_txdelay refers to the long time between the end of the receive time slot and the start of the transmit time slot), the transmit time slot starts, the transmit enable signal is in an enable state, and the receive enable signal is in a disable state; in this stage, the first switch S1 is turned off, the input end of the second switch S2 is connected to the first output end, and the capacitor C outputs a negative feedback control signal through the third triode and the fourth triode. It is noted that the third transistor and the fourth transistor are designed in the form of a high input impedance circuit, the voltage of the capacitor C being kept constant during the transmit time slot.
In the transmitting state, the power amplifier 206 of the radio frequency front end module works, and meanwhile, an adjustable resistor module 205 is connected between the input end and the output end of the power amplifier 206 to serve as negative feedback; the negative feedback control signal can change the resistance value of the adjustable resistance module 205, namely, can change the gain of the power amplifier 206, which is equivalent to adjusting the transmitting power of the power amplifier 206 of the radio frequency front end module; the larger the voltage value of the negative feedback control signal, the larger the resistance value of the adjustable resistance module 205, and the larger the gain of the power amplifier 206 is correspondingly changed.
After the transmission state lasts for t_tx seconds (t_tx refers to the duration of the transmission time slot), the transmission time slot ends, the transmission enable signal is switched to the disabled state, and in the transient phase of switching, the first end and the fourth end of the second switch S2 are connected to ground; the charge on the capacitor C is initialized by discharging, and then the first terminal and the third terminal of the second switch S2 are connected; the system waits for the next receive timing to arrive.
In this embodiment, the input end of the second switch S2 is 1 pin, the first output end is 2 pins, the second output end is 3 pins, and the third output end is 4 pins.
Compared with the related art, the module 200 for adjusting the transmitting power in the invention adds the signal receiving end RFin, the low noise amplifier 201, the signal coupler 202, the signal output end RFout, the coupling signal amplifier 203, the rectifying module 204, the first transistor Q1, the second transistor Q2, the first switch S1, the capacitor C, the second switch S2, the third transistor Q3, the fourth transistor Q4 and the adjustable resistor module 205 at the input end and the output end of the power amplifier 206 of the radio frequency front end module, so that the resistance value of the adjustable resistor module 205 can be changed through the cooperation of the devices to adjust the gain of the power amplifier 206, namely, the transmitting power of the power amplifier 206 can not always be transmitted with the maximum power, so as to reduce radiation, power consumption and heating value and prolong the service life.
Example two
The present embodiment provides a radio frequency front end module, which includes the module 200 for adjusting transmit power in the first embodiment. Since the rf front-end module in this embodiment includes the module 200 for adjusting transmission power in the first embodiment, the technical effects achieved by the module 200 for adjusting transmission power in the first embodiment can also be achieved, and will not be described herein.
Example III
The embodiment provides a wireless transmitting device, which includes a radio frequency front end module in the second embodiment.
The wireless transmitting device may be a WIFI router, a WIFI terminal device, or other devices with a wireless network transmitting function.
Because the wireless transmitting device in the present embodiment includes the rf front-end module in the second embodiment, the technical effect achieved by the rf front-end module in the second embodiment can also be achieved, which is not described herein.
The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present invention.
Claims (10)
1. The module for adjusting the transmitting power is characterized by comprising a signal receiving end, a low-noise amplifier, a signal coupler, a signal output end, a coupled signal amplifier, a rectifying module, a first transistor, a second transistor, a first switch, a capacitor, a second switch, a third transistor, a fourth transistor and an adjustable resistor module;
the signal receiving end is used for receiving radio frequency signals, the input end of the low noise amplifier is connected to the signal receiving end, the input end of the signal coupler is connected to the output end of the low noise amplifier, and the signal output end is connected to the first output end of the signal coupler and used for outputting first coupling radio frequency signals coupled through the signal coupler;
the input end of the coupled signal amplifier is connected to the second output end of the signal coupler and is used for accessing a second coupled radio frequency signal coupled by the signal coupler, and the input end of the rectifying module is connected to the output end of the coupled signal amplifier;
the input end of the first transistor is connected to the output end of the rectifying module, the first output end of the first transistor is connected to the power supply voltage, and the second output end of the first transistor is grounded;
a first input end of the second transistor is connected to a first output end of the first transistor, a first output end of the second transistor is connected to the power supply voltage, and a second output end of the second transistor is grounded;
a first end of the first switch is connected to a second output end of the second transistor, and the first switch is controlled to be turned on and off by receiving an enabling signal;
a first end of the capacitor is connected to a second end of the first switch, and a second end of the capacitor is grounded;
the input end of the second switch is connected to the second end of the first switch, the second output end of the second switch is suspended, the third output end of the second switch is grounded, and the second switch is communicated with the first output end of the second switch, the second output end of the second switch or the third output end of the second switch through the control of the receiving enabling signal and the transmitting enabling signal;
an input terminal of the third transistor is connected to a first output terminal of the second switch, and a first output terminal of the third transistor is connected to the power supply voltage;
a first input end of the fourth transistor is connected to a second output end of the third transistor, a first output end of the fourth transistor is connected to a first output end of the third transistor, and a second output end of the fourth transistor is grounded;
the input end of the adjustable resistor module is connected to the second output end of the fourth transistor, the output end of the adjustable resistor module is connected to the input end of the power amplifier of the radio frequency front end module, and the control end of the adjustable resistor module is connected to the output end of the power amplifier.
2. The module for adjusting transmit power of claim 1, wherein the first transistor is a first transistor; the base electrode of the first triode is used as a first input end of the first transistor, the collector electrode of the first triode is used as a first output end of the first transistor, and the emitter electrode of the first triode is used as a second output end of the first transistor;
the second transistor is a second triode; the base electrode of the second triode is used as a first input end of the second transistor, the collector electrode of the second triode is used as a first output end of the second transistor, and the emitter electrode of the second triode is used as a second output end of the second transistor;
the third transistor is a third triode; the base electrode of the third triode is used as a first input end of the third transistor, the collector electrode of the third triode is used as a first output end of the third transistor, and the emitter electrode of the third triode is used as a second output end of the third transistor;
the fourth transistor is a fourth triode; the base electrode of the fourth triode is used as a first input end of the fourth transistor, the collector electrode of the fourth triode is used as a first output end of the fourth transistor, and the emitter electrode of the fourth triode is used as a second output end of the fourth transistor.
3. The transmit power adjustment module of claim 2, wherein the transmit power adjustment module further comprises a first resistor, a second resistor, a third resistor, and a fourth resistor;
a first end of the first resistor is connected to the output end of the rectifying module, and a second end of the first resistor is connected to the power supply voltage;
the first end of the second resistor is connected to the output end of the rectifying module, and the second end of the second resistor is grounded;
two ends of the third resistor are respectively connected to the second end of the first resistor and the collector electrode of the first triode;
and two ends of the fourth resistor are respectively connected to the second end of the second resistor and the emitter of the first triode.
4. The transmit power adjustment module of claim 2, wherein the transmit power adjustment module further comprises a fifth resistor and a sixth resistor;
two ends of the fifth resistor are respectively connected to the collector electrode of the first triode and the base electrode of the second triode;
the first end of the sixth resistor is connected to the emitter of the second triode, and the second end of the sixth resistor is grounded.
5. The transmit power adjustment module of claim 2, wherein the transmit power adjustment module further comprises a seventh resistor; the first output end of the second switch is connected to the base electrode of the third triode after being connected with the seventh resistor in series.
6. The transmit power adjustment module of claim 2, wherein the transmit power adjustment module further comprises an eighth resistor; the first end of the eighth resistor is connected to the emitter of the fourth triode, and the second end of the eighth resistor is grounded.
7. The transmit power adjustment module of claim 2, wherein the transmit power adjustment module further comprises a ninth resistor; and the emitter of the fourth triode is connected to the input end of the adjustable resistor module after being connected with the ninth resistor in series.
8. The module of claim 1, wherein the adjustable resistor module is a transistor or a field effect transistor.
9. A radio frequency front end module comprising a module for adjusting transmit power according to any one of claims 1 to 8.
10. A wireless transmitting device, characterized in that it comprises a radio frequency front-end module according to claim 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310963563.XA CN116707556B (en) | 2023-08-02 | 2023-08-02 | Module for adjusting transmitting power, radio frequency front end module and wireless transmitting equipment |
| PCT/CN2024/107163 WO2025026155A1 (en) | 2023-08-02 | 2024-07-24 | Transmission power adjustment module, radio-frequency front-end module, and wireless transmission device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310963563.XA CN116707556B (en) | 2023-08-02 | 2023-08-02 | Module for adjusting transmitting power, radio frequency front end module and wireless transmitting equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116707556A true CN116707556A (en) | 2023-09-05 |
| CN116707556B CN116707556B (en) | 2023-10-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310963563.XA Active CN116707556B (en) | 2023-08-02 | 2023-08-02 | Module for adjusting transmitting power, radio frequency front end module and wireless transmitting equipment |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN116707556B (en) |
| WO (1) | WO2025026155A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117013968A (en) * | 2023-09-22 | 2023-11-07 | 深圳飞骧科技股份有限公司 | Power amplifying circuit and radio frequency power amplifying module |
| WO2025026155A1 (en) * | 2023-08-02 | 2025-02-06 | 深圳飞骧科技股份有限公司 | Transmission power adjustment module, radio-frequency front-end module, and wireless transmission device |
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- 2023-08-02 CN CN202310963563.XA patent/CN116707556B/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2025026155A1 (en) | 2025-02-06 |
| CN116707556B (en) | 2023-10-10 |
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