CN112910494B - Signal monitoring circuit and method and electronic equipment - Google Patents
Signal monitoring circuit and method and electronic equipment Download PDFInfo
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- CN112910494B CN112910494B CN202110138281.7A CN202110138281A CN112910494B CN 112910494 B CN112910494 B CN 112910494B CN 202110138281 A CN202110138281 A CN 202110138281A CN 112910494 B CN112910494 B CN 112910494B
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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
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/401—Circuits for selecting or indicating operating mode
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
Abstract
The application provides a signal monitoring circuit, a signal monitoring method and electronic equipment, wherein the signal monitoring circuit comprises a ground feeding antenna, a monitoring unit, a switch unit and an antenna tuning switch, the input end of the monitoring unit is connected with a second impedance line, the second impedance line and the first impedance line are arranged in parallel at intervals, and the monitoring unit acquires the receiving power of the ground feeding antenna through the coupling effect of the second impedance line and the first impedance line; the monitoring unit is used for monitoring the receiving power of the ground feeding antenna, controlling the second end of the switch unit to be disconnected with the third end of the switch unit and controlling the second end of the switch unit to be communicated with the fourth end of the switch unit under the condition that the receiving power exceeds preset power. The method and the device can avoid the radiation stray exceeding.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a signal monitoring circuit, a signal monitoring method, and an electronic device.
Background
Due to the space limitation of the mobile phone, the antenna feed point and the ground feed antenna are very close to each other, the Tuner (antenna tuning switch) can receive the strong signal transmitted by the antenna feed point, the strong signal can generate useless signals, namely harmonic waves after entering the Tuner, the harmonic waves are radiated out through the ground feed antenna, and the radiation stray exceeding standard is serious.
Disclosure of Invention
The embodiment of the application provides a signal monitoring circuit, a signal monitoring method and electronic equipment, and aims to solve the problem that radiation stray exceeds a standard seriously.
In a first aspect, an embodiment of the present application provides a signal monitoring circuit, including a ground feeding antenna, a monitoring unit, a switching unit, and an antenna tuning switch, where an output end of the monitoring unit is connected to a first end of the switching unit, the ground feeding antenna is connected to a second end of the switching unit through a first impedance line, a third end of the switching unit is connected to a radio frequency end of the antenna tuning switch, the radio frequency end of the antenna tuning switch is grounded, a fourth end of the switching unit is grounded, and the second end of the switching unit is communicated with the third end of the switching unit;
the input end of the monitoring unit is connected with a second impedance line, the second impedance line and the first impedance line are arranged in parallel at intervals, and the monitoring unit acquires the receiving power of the ground feed antenna through the coupling effect of the second impedance line and the first impedance line;
the monitoring unit is used for monitoring the receiving power of the ground feeding antenna, controlling the second end of the switch unit to be disconnected with the third end of the switch unit and controlling the second end of the switch unit to be communicated with the fourth end of the switch unit under the condition that the receiving power exceeds preset power.
In a second aspect, an embodiment of the present application further provides a signal monitoring method, which is applied to the signal monitoring circuit disclosed in the first aspect of the embodiment of the present application, and includes:
acquiring the receiving power of the ground feed antenna through the monitoring unit;
monitoring the receiving power of the ground feed antenna through the monitoring unit, controlling the second end of the switch unit to be disconnected with the third end of the switch unit and controlling the second end of the switch unit to be communicated with the fourth end of the switch unit under the condition that the receiving power exceeds preset power.
In a third aspect, an embodiment of the present application further provides an electronic device, including the signal monitoring circuit disclosed in the first aspect of the embodiment of the present application.
Therefore, in the embodiment of the application, the monitoring unit acquires the receiving power of the ground feed antenna through the coupling of the second impedance line and the first impedance line, monitors the receiving power of the ground feed antenna through the monitoring unit, and controls the second end of the switch unit to be disconnected with the third end of the switch unit and to be communicated with the fourth end of the switch unit under the condition that the receiving power exceeds the preset power, so that the antenna tuning switch can be prevented from generating nonlinear harmonics under the condition of overvoltage to cause radiation stray exceeding the standard.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic diagram of a signal monitoring circuit according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of another signal monitoring circuit provided in an embodiment of the present application;
FIG. 3 is a schematic diagram of another signal monitoring circuit provided by an embodiment of the present application;
fig. 4 is a schematic flowchart of a signal monitoring method according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1, fig. 1 is a schematic diagram of a signal monitoring circuit according to an embodiment of the present disclosure, as shown in fig. 1, the signal monitoring circuit includes a ground feeding antenna 10, a monitoring unit 20, a switching unit 30 and an antenna tuning switch 40, an output end of the monitoring unit 20 is connected to a first end of the switching unit 30, the ground feeding antenna 10 is connected to a second end of the switching unit 30 through a first impedance line, a third end of the switching unit 30 is connected to a radio frequency end of the antenna tuning switch 40, a radio frequency end of the antenna tuning switch 40 is grounded, a fourth end of the switching unit 30 is grounded, and a second end of the switching unit 30 is connected to the third end of the switching unit 30;
the input end of the monitoring unit 20 is connected to a second impedance line, the second impedance line and the first impedance line are arranged in parallel at an interval, and the monitoring unit 20 obtains the received power of the ground feeding antenna 10 through the coupling of the second impedance line and the first impedance line;
the monitoring unit 20 is configured to monitor the received power of the ground feeding antenna 10, and control the second terminal of the switching unit 30 to be disconnected from the third terminal of the switching unit 30 and control the second terminal of the switching unit 30 to be connected to the fourth terminal of the switching unit 30 when the received power exceeds a preset power.
Specifically, the signal power obtained by the second impedance line through the coupling action may be smaller than the received power of the ground feeding antenna 10, for example: a coupling coefficient exists between the second impedance line and the first impedance line, and if the coupling coefficient is smaller than 1, the signal power acquired by the second impedance line is smaller than the receiving power of the ground feed antenna 10, and the difference between the signal power acquired by the second impedance line and the receiving power of the ground feed antenna 10 can be determined by the coupling coefficient. The monitoring unit 20 may determine the receiving power of the ground feeding antenna 10 according to the signal power obtained by the second impedance line and a difference between the signal power obtained by the second impedance line and the receiving power of the ground feeding antenna 10.
When the voltage applied to the antenna tuning switch 40 exceeds a certain value, the Radiation Stray Emission (RSE) may exceed a standard, for example: because the antenna feed point in the mobile phone is close to the ground feed antenna 10 due to the space limitation, the antenna tuning switch 40 receives the strong transmission signal from the antenna feed point, the strong transmission signal enters the antenna tuning switch 40 and then generates useless signals, namely harmonic waves, the harmonic waves are radiated out through the ground feed antenna 10 to generate radiation stray, and when the voltage of the ground feed antenna 10 exceeds the rated voltage of the harmonic waves generated by the antenna tuning switch 40, the antenna tuning switch 40 generates nonlinear harmonic waves, thereby causing the problem of the exceeding of the radiation stray waves. Therefore, the preset power may be a power corresponding to a rated voltage of the antenna tuning switch 40 for generating a harmonic, if it is monitored that the power of the signal received by the ground feeding antenna 10 exceeds the preset power, it may be determined that the antenna tuning switch 40 will generate a nonlinear harmonic, and the signal received by the ground feeding antenna 10 may be prevented from entering the antenna tuning switch 40 to generate the nonlinear harmonic by controlling the second end of the switch unit 30 to be disconnected from the third end of the switch unit 30, so as to avoid the condition that the radiation stray exceeds the standard.
In the embodiment of the present application, the monitoring unit 20 obtains the received power of the ground feeding antenna 10 through the coupling of the second impedance line and the first impedance line, and through the monitoring unit 20 monitors the received power of the ground feeding antenna 10, when the received power exceeds the preset power, the second end of the switch unit 30 is controlled to be disconnected with the third end of the switch unit 30, and the second end of the switch unit 30 is controlled to be communicated with the fourth end of the switch unit 30, so that the antenna tuning switch 40 can be prevented from generating nonlinear harmonics under the condition of overvoltage to cause radiation stray exceeding.
In addition, the monitoring unit 20 can monitor the received power of the ground feeding antenna 10 through the coupling effect between the first impedance line and the second impedance line which are arranged in parallel at intervals instead of a power coupler, thereby reducing the cost of the signal monitoring circuit and avoiding changing the circuit design of the existing antenna tuning switch.
Optionally, as shown in fig. 2, the signal monitoring circuit further includes a power amplifier 50, and the input terminal of the monitoring unit 20 is connected to a second impedance line through the power amplifier 50;
the power amplifier 50 amplifies the signal received by the second impedance line and transmits the amplified signal to the monitoring unit 20;
the monitoring unit 20 is configured to monitor the received power of the ground feeding antenna 10, and control the second terminal of the switching unit 30 to be disconnected from the third terminal of the switching unit 30 and control the second terminal of the switching unit 30 to be connected to the fourth terminal of the switching unit 30 when the received power exceeds a preset power, and includes:
the monitoring unit 20 is configured to monitor the amplified power, and control the second end of the switching unit 30 to be disconnected from the third end of the switching unit 30 and control the second end of the switching unit 30 to be connected to the fourth end of the switching unit 30 when the amplified power exceeds a preset power. That is, the monitoring unit 20 is connected to the second impedance line through a power amplifier 50, and the power amplifier monitors the received power of the ground feeding antenna, which is obtained by the second impedance line through the coupling with the first impedance line.
The power amplifier 50 may be used to compensate for power loss caused by signal transmission, for example: a power loss due to a coupling action between the first impedance line and the second impedance line, an interference loss when the ground feed antenna receives a signal transmitted from another antenna, and the like.
Specifically, the power amplifier 50 may be a low noise amplifier, such as: when the signal received by the ground feed antenna 10 is weak, the noise of the amplifier itself may cause serious interference to the signal, so that the noise of the amplifier itself may be reduced by the low noise amplifier to improve the signal-to-noise ratio of the output.
In this embodiment, the monitoring unit 20 monitors the power amplified by the power amplifier 50, so that the transmission effect of the signal received by the ground feeding antenna 10 can be improved.
Optionally, as shown in fig. 2, the switching unit 30 includes a plurality of sub-switching units, each sub-switching unit includes an inductor and a radio frequency switch, the number of radio frequency terminals of the antenna tuning switch 40 is multiple, the output terminal of the monitoring unit 20 is connected to the first terminal of each radio frequency switch, the ground feed antenna 10 is connected to the first terminal of each inductor, the second terminal of any inductor is connected to the second terminal of the radio frequency switch of the same sub-switching unit as the inductor, the third terminal of any radio frequency switch is connected to one radio frequency terminal of the antenna tuning switch 40, the radio frequency terminals connected to the third terminals of each radio frequency switch are different, the fourth terminal of each radio frequency switch is grounded, and the second terminal of each radio frequency switch is connected to the third terminal of the radio frequency switch;
the monitoring unit 20 is configured to monitor the received power of the ground feeding antenna 10, and control the second terminal of each rf switch to be disconnected from the third terminal of the rf switch and control the second terminal of the rf switch to be connected to the fourth terminal of the rf switch when the received power exceeds a preset power.
The number of the rf terminals of the antenna tuning switch 40 and the number of the sub-switch units may be set in a matching manner, for example: if the switch unit 30 includes two sub-switch units, the number of the rf terminals of the antenna tuning switch 40 needs to be at least two; if the switch unit 30 includes three sub-switch units, the number of the rf terminals of the antenna tuning switch 40 needs to be at least three, and the inductance of each sub-switch unit is an inductance matched with the antenna tuning switch, and the sub-switch units are respectively connected to different rf terminals of the antenna tuning switch 40 through the inductance of each sub-switch unit, so as to implement different antenna tuning functions.
Specifically, the radio frequency switch may be a single-pole double-throw radio frequency switch, a first end of the radio frequency switch is a signal transceiving end, the radio frequency switch may receive a control signal sent by the monitoring unit through the first end, and control a second end of the radio frequency switch to be connected to a third end, or control the second end of the radio frequency switch to be connected to a fourth end, and when the monitoring unit determines that the power of the received signal is too high, the received signal may be prevented from entering the antenna tuning switch to generate nonlinear harmonics, thereby preventing stray radiation from exceeding the standard.
Alternatively, as shown in fig. 2, the plurality of sub-switching units include a first sub-switching unit 31, a second sub-switching unit 32, a third sub-switching unit 33, and a fourth sub-switching unit 34; the plurality of RF terminals of the antenna tuning switch 40 includes a first RF terminal RF 1 A second RF terminal RF 2 A third RF terminal RF 3 A fourth RF terminal RF 4 (ii) a The first sub-switch unit 31 comprises a first inductance L 1 And a first RF switch S 1 The second sub-switch unit 32 includes a second inductor L 2 And a second radio frequency switch S 2 The third sub-switch unit 33 includes a third inductor L 3 And a third RF switch S 3 The fourth sub-switch unit 34 includes a fourth inductor L 4 And a fourth RF switch S 4 ；
The output end of the monitoring unit is connected with the firstThe first end of radio frequency switch, the output of monitoring unit is connected the first end of second radio frequency switch, the output of monitoring unit is connected the first end of third radio frequency switch, the output of monitoring unit is connected the first end of fourth radio frequency switch, it connects to feed ground antenna 10 first inductance L 1 The first end of the first inductor L 1 Is connected to the first radio frequency switch S 1 The first radio frequency switch S 1 Is connected to the first radio frequency terminal RF of the antenna tuning switch 40 1 Said first radio frequency switch S 1 Is grounded, the first radio frequency switch S 1 The second end of the first switch is communicated with the first radio frequency switch S 1 A third end of (a);
the ground feed antenna 10 is connected to the second inductor L 2 The first terminal of (1), the second inductance L 2 Is connected to the second radio frequency switch S 2 The second terminal of (2), the second radio frequency switch S 2 Is connected to a second rf terminal of the antenna tuning switch 40, the second rf switch S 2 The fourth terminal of the second radio frequency switch S is grounded, and the second radio frequency switch S is connected with the ground 2 Is connected with the second radio frequency switch S 2 A third end of (a);
the ground feed antenna 10 is connected to the third inductor L 3 The first terminal of (1), the third inductance L 3 Is connected to the third radio frequency switch S 3 The second terminal of (2), the third radio frequency switch S 3 Is connected to a third RF terminal RF of said antenna tuning switch 40 3 Said third RF switch S 3 Is grounded, the third radio frequency switch S 3 Second end of the second switch is communicated with the third radio frequency switch S 3 A third end of (a);
the ground feed antenna 10 is connected to the fourth inductor L 4 The first terminal of (1), the fourth inductance L 4 Is connected to the fourth radio frequency switch S 4 The second terminal of (1), the fourth radio frequency switch S 4 Is connected to the fourth radio frequency terminal RF of the antenna tuning switch 40 4 Said fourth RF switch S 4 Fourth terminal of (2)Ground, the fourth radio frequency switch S 4 The second end of the second switch is communicated with the fourth radio frequency switch S 4 A third end of (a);
the monitoring unit 20 is configured to monitor a received power of the ground feeding antenna 10, and control the first rf switch S when the received power exceeds a preset power 1 And the first RF switch S 1 The third end of the second switch is disconnected to control the second radio frequency switch S 2 And the second terminal of the second RF switch S 2 Is open to control the third radio frequency switch S 3 And the second terminal of the third RF switch S 3 To control the fourth radio frequency switch S 4 And the second terminal of the fourth RF switch S 4 And controls the first radio frequency switch S 1 And the first RF switch S 1 Is communicated with the fourth end to control the second radio frequency switch S 2 Second terminal and second RF switch S 2 Is connected to the fourth terminal, controls the third radio frequency switch S 3 Second terminal and third radio frequency switch S 3 Is communicated with the fourth end to control the fourth radio frequency switch S 4 Second terminal and fourth rf switch S 4 The fourth end of the first and second connecting pipes is communicated.
Specifically, the output end of the monitoring unit may include a plurality of ports, for example: as shown in fig. 2, corresponding to the four sub-switch units included in the switch unit 30, the output end of the monitoring unit may have four ports, and each port is connected to the first rf switch S respectively 1 A second RF switch S 2 A third RF switch S 3 And a fourth RF switch S 4 And when the monitoring unit 20 monitors that the power of the signal received by the ground feeding antenna 10 exceeds the preset power, the monitoring unit controls the first rf switch S through the four output ports respectively 1 A second RF switch S 2 A third RF switch S 3 And a fourth RF switch S 4 。
Optionally, as shown in fig. 2, the monitoring unit 20 includes a transceiver 21, and an output end of the transceiver 21 is connected to the first radio frequencySwitch S 1 The output terminal of the transceiver 21 is connected to the second rf switch S 2 The output terminal of the transceiver 21 is connected to the third rf switch S 3 The output terminal of the transceiver 21 is connected to the fourth rf switch S 4 A first end of (a);
the signal monitoring circuit further includes a fifth rf switch 60, a transmitting module 70 and a signal antenna 80, the signal antenna 80 is connected to the first end of the fifth rf switch 60 through the transmitting module 70, the output end of the power amplifier 50 is connected to the second end of the fifth rf switch 60, the third end of the fifth rf switch 60 is connected to the input end of the transceiver 21, and the second end of the fifth rf switch 60 is connected to the third end of the fifth rf switch 60;
the second terminal of the fifth rf switch 60 is disconnected from the third terminal of the fifth rf switch 60 at a preset time, and the first terminal of the fifth rf switch 60 is connected to the third terminal of the fifth rf switch 60 at a preset time.
The transceiver 21 may monitor the signal received by the ground feeding antenna 10 in a frame sampling monitoring manner, for example: one frame is generally a frame having a plurality of slots, and in LTE (Long Term Evolution), one frame includes 10 slots, one of which may be selected for monitoring the power of the signal received by the ground feeding antenna 10, and the other slots may be selected for monitoring the power of the signal received by the signal antenna 60. In addition, the frame extraction monitoring may be implemented by the fifth rf switch 60, where the preset time may correspond to the selected time slot for monitoring the power of the signal received by the signal antenna 60, and the second end of the fifth rf switch 60 is communicated with the third end of the fifth rf switch 60 in each frame extraction time slot, and may be used to monitor the power of the signal received by the ground feeding antenna 10; the first terminal of the fifth rf switch 60 is connected to the third terminal of the fifth rf switch 60 in each time slot except the extracted time slot, and may be configured to monitor the power of the signal received by the signal antenna 60.
In this embodiment, the second terminal of the fifth rf switch 60 is disconnected from the third terminal of the fifth rf switch 60 at a preset time, and the first terminal of the fifth rf switch 60 is connected to the third terminal of the fifth rf switch 60 at a preset time, so that the transceiver 21 may be configured to monitor the power of the signal received by the signal antenna 60 at the preset time, and monitor the power of the signal received by the ground feeding antenna 10 at a time other than the preset time, thereby implementing multiplexing of the transceiver 21.
For ease of understanding, examples are illustrated below:
fig. 3 is a schematic diagram of another signal monitoring circuit according to an embodiment of the present application, and as shown in fig. 3, a main antenna signal is coupled to ANT _ GND (ground feed antenna), and signals received by ANT _ GND respectively pass through inductors L 1 And SP2T 1 (first radio frequency switch), inductor L 2 And SP2T 2 (second radio frequency switch), inductor L 3 And SP2T 3 (third radio frequency switch) and inductor L 4 And SP2T 4 (fourth rf switch) to different rf terminals of Tuner (antenna tuning switch) to implement different antenna tuning functions; assuming that the conducted power is a, the efficiency of ANT _ TRX (signal antenna) is B, and the isolation between two antennas ANT _ GND and ANT _ TRX is C, at the common end of Tuner, when a PCB (Printed Circuit Board) layout is used, an impedance line can be used to receive a signal D received by a ground feed antenna, and a signal E is obtained through coupling, assuming that a coupling coefficient is F, the coupling coefficient F is consistent with a coupling coefficient I of TX _ Module, the gain of LNA (low noise amplifier) is G, SP2T 5 The signal received by the (fifth radio frequency switch) is H, and the following conditions are met: g ═ B + C + F; H-A-I.
Assuming that Vpeak is the sustainable voltage of Tuner, U/R is obtained, the sustainable voltage U is converted into power P according to the formula P, and the received signal power of transceiver is X. When the signal power X received by Transceiver reaches P-F + G, it is judged that Tuner is about to be overvoltage, and the signal power is switched to SP2T corresponding to Tuner.
The trancer may include a plurality of GPIO (General-purpose input/output) ports, for example, as shown in fig. 3, and the trancer passes through the GPIO portsGPIO 1 Port and SP2T 1 GPIO port connection of, by GPIO 2 Port and SP2T 2 GPIO port connection of, through, GPIO 3 Port and SP2T 3 GPIO port connection of, by GPIO 4 Port and SP2T 4 The GPIO port is connected and passes through GPIO when the signal power X received by a transmitter reaches P-F + G 1 Port and GPIO 2 Port and GPIO 3 Port and GPIO 4 Port individual control SP2T 1 、SP2T 2 、SP2T 3 And SP2T 4 Disconnecting ANT _ GND from respective radio frequency ports of Tuner, SP2T 1 、SP2T 2 、SP2T 3 And SP2T 4 The GPIOs of the first and second rf switches respectively correspond to the first end of the first rf switch, the first end of the second rf switch, the first end of the third rf switch, and the first end of the fourth rf switch, and are configured to receive a control signal transmitted by the transceiver.
Wherein Transceiver can pass SP2T 5 With frame decimation monitoring, at SP2T 5 And SP2T 5 The second terminal and the third terminal are communicated, and one of the time slots can be selected to be communicated with SP2T 5 The second terminal and the third terminal of the antenna are used as the monitoring of the power of the receiving signal of the ground feed antenna, and other time slots are communicated with SP2T 5 As well as the third terminal, as a monitor of the power of the signal received by the signal antenna.
In this embodiment, the transceiver monitors the power of a signal received by the ground feed antenna, and when the power of the received signal reaches the power corresponding to the voltage that can be borne by Tuner, the transceiver switches to the ground of the corresponding radio frequency switch, so that the path from the corresponding radio frequency switch to Tuner is disconnected, thereby avoiding nonlinear harmonics from occurring due to overvoltage in Tuner, and avoiding the RSE from exceeding the standard.
Referring to fig. 4, an embodiment of the present invention further provides a schematic flow chart of a signal monitoring method applied to the signal monitoring circuit, including:
In the embodiment of the application, through the monitoring unit obtains the received power who feeds ground antenna, monitoring the received power who feeds ground antenna surpasses under the condition of default power, control the second end of switch element with the third end disconnection of switch element, and control the second end of switch element with the fourth end intercommunication of switch element can avoid antenna tuning switch produces nonlinear harmonic and leads to the spurious standard exceeding of radiation under the condition of excessive pressure.
Optionally, the signal monitoring circuit may further include a power amplifier, and the signal monitoring method may further include the following steps:
acquiring a signal received by the second impedance line through the power amplifier, and amplifying the signal received by the second impedance line;
acquiring the power of the power amplifier after amplifying the signal received by the second impedance line through the monitoring unit;
in step 402, the monitoring, by the monitoring unit, the monitoring the received power of the ground feeding antenna, and when the received power exceeds a preset power, controlling the second terminal of the switching unit to be disconnected from the third terminal of the switching unit, and controlling the second terminal of the switching unit to be connected to the fourth terminal of the switching unit, includes:
the amplified power is monitored through the monitoring unit, and the second end of the switch unit and the third end of the switch unit are controlled to be disconnected and the second end of the switch unit and the fourth end of the switch unit are controlled to be communicated under the condition that the amplified power exceeds the preset power.
It should be noted that this embodiment is an implementation corresponding to the foregoing signal monitoring circuit embodiment, and therefore, reference may be made to the relevant description in the foregoing signal monitoring circuit embodiment, and the same beneficial effects may be achieved. To avoid repetition of the description, the description is omitted.
The various optional implementations described in the embodiments of the present application may be implemented in combination with each other or implemented separately without conflicting with each other, and the embodiments of the present application are not limited to this.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatuses in the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions recited, e.g., the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the methods of the embodiments of the present application.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. A signal monitoring circuit is characterized by comprising a ground feeding antenna, a monitoring unit, a switching unit and an antenna tuning switch, wherein the output end of the monitoring unit is connected with the first end of the switching unit, the ground feeding antenna is connected with the second end of the switching unit through a first impedance line, the third end of the switching unit is connected with the radio frequency end of the antenna tuning switch, the radio frequency end of the antenna tuning switch is grounded, the fourth end of the switching unit is grounded, and the second end of the switching unit is communicated with the third end of the switching unit;
the input end of the monitoring unit is connected with a second impedance line, the second impedance line and the first impedance line are arranged in parallel at intervals, and the monitoring unit acquires the receiving power of the ground feed antenna through the coupling effect of the second impedance line and the first impedance line;
the monitoring unit is used for monitoring the receiving power of the ground feeding antenna, controlling the second end of the switch unit to be disconnected with the third end of the switch unit and controlling the second end of the switch unit to be communicated with the fourth end of the switch unit under the condition that the receiving power exceeds preset power.
2. The signal monitoring circuit of claim 1, further comprising a power amplifier, wherein an input of the monitoring unit is connected to a second impedance line through the power amplifier;
the power amplifier amplifies the signal received by the second impedance line and transmits the amplified signal to the monitoring unit;
the monitoring unit is configured to monitor a received power of the ground feeding antenna, control the second terminal of the switch unit to be disconnected from the third terminal of the switch unit and control the second terminal of the switch unit to be connected to the fourth terminal of the switch unit when the received power exceeds a preset power, and includes:
the monitoring unit is used for monitoring the amplified power, controlling the second end of the switch unit to be disconnected with the third end of the switch unit and controlling the second end of the switch unit to be communicated with the fourth end of the switch unit under the condition that the amplified power exceeds the preset power.
3. The signal monitoring circuit of claim 2, wherein the switch unit comprises a plurality of sub-switch units, each sub-switch unit comprises an inductor and a radio frequency switch, the number of the radio frequency terminals of the antenna tuning switch is plural, the output terminal of the monitoring unit is connected to the first terminal of each radio frequency switch, the ground feed antenna is connected to the first terminal of each inductor, the second terminal of any inductor is connected to the second terminal of the radio frequency switch in the same sub-switch unit as the inductor, the third terminal of any radio frequency switch is connected to one radio frequency terminal of the antenna tuning switch, the radio frequency terminals connected to the third terminals of the radio frequency switches are different, the fourth terminal of each radio frequency switch is grounded, and the second terminal of each radio frequency switch is connected to the third terminal of the radio frequency switch;
the monitoring unit is used for monitoring the receiving power of the ground feed antenna, controlling the second end of each radio frequency switch to be disconnected with the third end of each radio frequency switch under the condition that the receiving power exceeds the preset power, and controlling the second end of each radio frequency switch to be communicated with the fourth end of each radio frequency switch.
4. The signal monitoring circuit of claim 3, wherein the plurality of sub-switching units includes a first sub-switching unit, a second sub-switching unit, a third sub-switching unit, and a fourth sub-switching unit; the plurality of radio frequency ends of the antenna tuning switch comprise a first radio frequency end, a second radio frequency end, a third radio frequency end and a fourth radio frequency end; the first sub-switch unit comprises a first inductor and a first radio frequency switch, the second sub-switch unit comprises a second inductor and a second radio frequency switch, the third sub-switch unit comprises a third inductor and a third radio frequency switch, and the fourth sub-switch unit comprises a fourth inductor and a fourth radio frequency switch;
the output end of the monitoring unit is connected with the first end of the first radio frequency switch, the output end of the monitoring unit is connected with the first end of the second radio frequency switch, the output end of the monitoring unit is connected with the first end of the third radio frequency switch, the output end of the monitoring unit is connected with the first end of the fourth radio frequency switch, the ground feed antenna is connected with the first end of the first inductor, the second end of the first inductor is connected with the second end of the first radio frequency switch, the third end of the first radio frequency switch is connected with the first radio frequency end of the antenna tuning switch, the fourth end of the first radio frequency switch is grounded, and the second end of the first radio frequency switch is communicated with the third end of the first radio frequency switch;
the ground feed antenna is connected with a first end of the second inductor, a second end of the second inductor is connected with a second end of the second radio frequency switch, a third end of the second radio frequency switch is connected with a second radio frequency end of the antenna tuning switch, a fourth end of the second radio frequency switch is grounded, and a second end of the second radio frequency switch is communicated with a third end of the second radio frequency switch;
the ground feed antenna is connected with a first end of the third inductor, a second end of the third inductor is connected with a second end of the third radio frequency switch, a third end of the third radio frequency switch is connected with a third radio frequency end of the antenna tuning switch, a fourth end of the third radio frequency switch is grounded, and a second end of the third radio frequency switch is communicated with a third end of the third radio frequency switch;
the ground feed antenna is connected with a first end of the fourth inductor, a second end of the fourth inductor is connected with a second end of the fourth radio frequency switch, a third end of the fourth radio frequency switch is connected with a fourth radio frequency end of the antenna tuning switch, a fourth end of the fourth radio frequency switch is grounded, and a second end of the fourth radio frequency switch is communicated with a third end of the fourth radio frequency switch;
the monitoring unit is used for monitoring the receiving power of the ground feeding antenna, and under the condition that the receiving power exceeds the preset power, controlling the second end of the first radio frequency switch to be disconnected with the third end of the first radio frequency switch, controlling the second end of the second radio frequency switch to be disconnected with the third end of the second radio frequency switch, controlling the second end of the third radio frequency switch to be disconnected with the third end of the third radio frequency switch, and controlling the second end of the fourth radio frequency switch to be disconnected with the third end of the fourth radio frequency switch, and controlling the second end of the first radio frequency switch to be communicated with the fourth end of the first radio frequency switch, controlling the second end of the second radio frequency switch to be communicated with the fourth end of the second radio frequency switch, controlling the second end of the third radio frequency switch to be communicated with the fourth end of the third radio frequency switch, and controlling the second end of the fourth radio frequency switch to be communicated with the fourth end of the fourth radio frequency switch.
5. The signal monitoring circuit of claim 4, wherein the monitoring unit comprises a transceiver, an output of the transceiver is connected to the first terminal of the first RF switch, an output of the transceiver is connected to the first terminal of the second RF switch, an output of the transceiver is connected to the first terminal of the third RF switch, and an output of the transceiver is connected to the first terminal of the fourth RF switch;
the signal monitoring circuit further comprises a fifth radio frequency switch, a transmitting module and a signal antenna, wherein the signal antenna is connected with a first end of the fifth radio frequency switch through the transmitting module, an output end of the power amplifier is connected with a second end of the fifth radio frequency switch, a third end of the fifth radio frequency switch is connected with an input end of the transceiver, and the second end of the fifth radio frequency switch is communicated with the third end of the fifth radio frequency switch;
the second end of the fifth radio frequency switch is disconnected with the third end of the fifth radio frequency switch at preset time, and the first end of the fifth radio frequency switch is communicated with the third end of the fifth radio frequency switch at preset time.
6. A signal monitoring method applied to the signal monitoring circuit according to any one of claims 1 to 5, comprising:
acquiring the receiving power of the ground feed antenna through the monitoring unit;
and monitoring the receiving power of the ground feed antenna through the monitoring unit, controlling the second end of the switch unit to be disconnected with the third end of the switch unit and controlling the second end of the switch unit to be communicated with the fourth end of the switch unit under the condition that the receiving power exceeds the preset power.
7. The signal monitoring method of claim 6, wherein the signal monitoring circuit further comprises a power amplifier;
acquiring a signal received by the second impedance line through the power amplifier, and amplifying the signal received by the second impedance line;
acquiring the power of the power amplifier after amplifying the signal received by the second impedance line through the monitoring unit;
the monitoring unit monitors the received power of the ground feed antenna, controls the second end of the switch unit to be disconnected from the third end of the switch unit and controls the second end of the switch unit to be communicated with the fourth end of the switch unit when the received power exceeds a preset power, and the monitoring unit includes:
the amplified power is monitored through the monitoring unit, and the second end of the switch unit and the third end of the switch unit are controlled to be disconnected and the second end of the switch unit and the fourth end of the switch unit are controlled to be communicated under the condition that the amplified power exceeds the preset power.
8. An electronic device, characterized in that it comprises a signal monitoring circuit according to any one of claims 1 to 5.
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