CN107294557B - Radio frequency front-end circuit and complete machine coupling test method of mobile terminal - Google Patents

Abstract

Embodiments of the present invention provide a radio frequency front-end circuit of a mobile terminal and a complete machine coupling test method. The radio frequency front-end circuit includes: a main antenna, a diversity antenna, a diversity antenna switch and a first power detection circuit. The diversity antenna uses the coupling effect between the main antenna and the diversity antenna to receive the test signal transmitted by the main antenna; the input end of the diversity antenna switch is connected to the diversity antenna to receive the test signal from the diversity antenna, and the output of the diversity antenna switch The terminal is used to output the test signal to the first power detection circuit; the first power detection circuit is used to perform power detection on the test signal, so as to realize the whole machine coupling test of the mobile terminal, so as to eliminate the dependence on the comprehensive tester and reduce the overall Hardware cost for machine-coupled testing.

Description

RF front-end circuit and complete machine coupling test method of mobile terminal

technical field

The present invention relates to the field of communications, and more particularly to a radio frequency front-end circuit of a mobile terminal and a method for testing the whole machine coupling in the field of communications.

Background technique

After the production and assembly of mobile terminals such as mobile phones, Internet cards, and data cards are completed, the whole machine coupling test must be carried out to verify whether the wireless communication function of the mobile terminal is normal. Specifically, it is to verify whether the radio frequency function of the mobile terminal is normal and whether the antenna and the motherboard are well matched. During the whole machine coupling test, the mobile terminal under test establishes a connection with the comprehensive tester through signaling or non-signaling, and judges the wireless communication of the mobile terminal under test by judging the transmit power of the main antenna and the received power of the diversity antenna. Whether the function is normal and whether the antenna performance meets the standard.

The whole machine coupling test mainly uses the coupling board in the shielding box as the antenna of the comprehensive tester to couple with the mobile terminal under test, so as to establish a non-signaling connection for testing. The whole machine coupling test is divided into the main set antenna whole machine coupling test and the diversity antenna whole machine coupling test.

1. The coupling test process of the main antenna

Configure the parameters of the comprehensive tester, set the test frequency point of the corresponding frequency band of the comprehensive tester, and configure the attenuation value of the radio frequency (RF) channel of the comprehensive tester according to the calibrated coupling loss value. Then, it is determined whether the mobile terminal to be tested can communicate with a personal computer (Personal Computer, PC) and whether it is in a factory test mode (Factory Test Mode, FTM). Next, start the corresponding session, then acquire downlink pilot signaling, and switch to a new test channel. And configure the parameters of the comprehensive tester during the maximum transmit power test. Finally, read the maximum transmit power value of the mobile terminal to be tested from the comprehensive tester, and judge whether it meets the test index range. If so, end the session and save the test results.

2. Coupling test process of diversity antenna

Configure the RF channel attenuation value of the comprehensive tester. Check whether the port communication of the mobile terminal to be tested is normal, configure the mode of the mobile terminal to be tested as FTM mode, and set the frequency band and test channel. Next, the mode of the mobile terminal to be tested is set to receive mode, the diversity channel of the mobile terminal to be tested is turned on, and the gain level of the low noise amplifier (Low Noise Amplifier, LNA) is set to LNA0. After configuring the downlink channel and downlink power of the instrument to -80.0dBm, obtain the receiving automatic gain control (AGC) value from the mobile terminal to be tested, and convert it into received power, and judge whether the power value is within the test index within the range. If it does not match, return failure, exit the test, and if it matches, close the diversity channel.

However, when the above method is used for the whole machine coupling test, each whole machine coupling test station needs to be equipped with a comprehensive tester, a PC and a shielding box (including a coupling fixture), which is costly.

SUMMARY OF THE INVENTION

The embodiments of the present invention provide a radio frequency front-end circuit of a mobile terminal and a whole machine coupling test method, so that when the whole machine coupling test is performed on the mobile terminal, the dependence on the comprehensive tester can be eliminated, thereby reducing the cost. In addition, the parallel detection of the main antenna and the diversity antenna can be realized, and the detection efficiency can be improved.

In a first aspect, a radio frequency front-end circuit of a mobile terminal is provided, including: a main antenna, a diversity antenna, a diversity antenna switch and a first power detection circuit.

The diversity antenna utilizes the coupling effect between the main antenna and the diversity antenna to receive the test signal transmitted by the main antenna.

The input end of the diversity antenna switch is connected to the diversity antenna for receiving the test signal from the diversity antenna, and the output end of the diversity antenna switch is used for outputting the test signal to the first power detection circuit.

The first power detection circuit is used to perform power detection on the test signal to determine whether the wireless communication function of the mobile terminal and the performance of the main antenna and the diversity antenna meet the standard.

The radio frequency front-end circuit of the mobile terminal according to the embodiment of the present invention does not need to use external equipment such as a comprehensive tester, and only needs to perform power detection on the test signal transmitted by the main antenna received by the diversity antenna in the radio frequency front-end circuit, and then it can be determined Whether the wireless communication function of the mobile terminal and the performance of the main antenna and the diversity antenna meet the standards to achieve the purpose of the whole machine coupling test. Thereby, the hardware cost of the whole machine coupling test can be reduced.

On the other hand, by performing power detection on the test signal transmitted by the main antenna and received by the diversity antenna in the RF front-end circuit, the parallel detection of the main antenna and the diversity antenna can be realized, and the detection efficiency can be improved. In addition, since the coupling test of the whole machine is directly coupled by the main diversity antenna of the mobile terminal, no external coupling board is required, so the test error caused by the external coupling board in the conventional whole machine coupling test can be eliminated.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the radio frequency front-end circuit may further include a coupler and a switch.

The coupler is located in the main set of radio frequency front-end circuits in the radio frequency front-end circuit, and is used for coupling the first communication service signal transmitted by the main set of radio frequency front-end circuits to obtain the coupled signal.

The first input terminal of the switch is used for receiving the test signal, the second input terminal of the switch is used for receiving the coupling signal, and the output terminal of the switch is used for switching the output terminal of the switch to output the test signal or the coupling signal to the first power detection circuit.

At this time, the first power detection circuit may perform power detection on the test signal or the coupled signal.

The radio frequency front-end circuit of the mobile terminal according to the embodiment of the present invention can support that the test signal is transmitted through the main antenna, received through the diversity antenna, and finally input to the first power detection circuit. The closed-loop control of coupled transmission and reception of the radio frequency signal (the first communication service signal) in the mobile terminal can be realized, and the power of the test signal received by the diversity antenna can be detected synchronously. On the premise that the power of the test signal transmitted by the main antenna is controllable and known, the first power detection circuit can determine the transmission of the main antenna, the reception of the diversity antenna, and the isolation of the main antenna and the diversity antenna. , to achieve the purpose of the whole machine coupling test.

With reference to the above possible implementation manners of the first aspect, in a second possible implementation manner of the first aspect, the radio frequency front-end circuit may further include a coupler and a second power detection circuit.

The coupler is located in the main set of radio frequency front-end circuits in the radio frequency front-end circuit, and is used for coupling the first communication service signal transmitted by the main set of radio frequency front-end circuits to obtain the coupled signal.

The second power detection circuit is used for receiving the coupled signal and performing power detection on the coupled signal.

The radio frequency front-end circuit of the mobile terminal according to the embodiment of the present invention can support that the test signal is transmitted through the main antenna, received through the diversity antenna, and finally input to the first power detection circuit. The second power detection circuit can realize closed-loop control of coupled transmission and reception of radio frequency signals (first communication service signals) in the mobile terminal, and the first power detection circuit can synchronously detect the power of the test signal received by the diversity antenna. On the premise that the power of the test signal transmitted by the main antenna is controllable and known, the first power detection circuit can determine the transmission of the main antenna, the reception of the diversity antenna, and the isolation of the main antenna and the diversity antenna. , to achieve the purpose of the whole machine coupling test.

In combination with the above possible implementation manners of the first aspect, in a third possible implementation manner of the first aspect, the diversity antenna switch further includes at least one second communication service signal output terminal, and the at least one second communication service signal output terminal is used for The second communication service signal received by the diversity antenna is output to the diversity receiving radio frequency circuit in the radio frequency front-end circuit.

With reference to the above possible implementations of the first aspect, in a fourth possible implementation of the first aspect, the switch is a single-pole double-throw switch or a multi-throw switch.

With reference to the above possible implementation manners of the first aspect, in a fifth possible implementation manner of the first aspect, the first power detection circuit is a high power detection (High power Detect, HDET) circuit.

In a second aspect, a mobile terminal is provided, including the first aspect and the radio frequency front-end circuit in any possible implementation manner of the first aspect.

In a third aspect, a whole machine coupling test method for a mobile terminal is provided, the whole machine coupling test method is applied to a radio frequency front-end circuit of the mobile terminal, and the radio frequency front-end circuit includes a main set antenna, a diversity antenna, a diversity antenna switch and a third antenna. A power detection circuit, the input end of the diversity antenna switch is connected with the diversity antenna, and the output end of the diversity antenna switch is connected with the first power detection circuit. The whole machine coupling test method includes: acquiring a test signal, wherein the test signal is a mobile terminal The signal transmitted when entering the test mode; the test signal transmitted by the main antenna is received from the diversity antenna; the test signal is input into the diversity antenna switch, and the test signal is output to the first power detection circuit; the first power detection circuit is obtained to perform the test signal. The results obtained by the power detection are used to determine whether the wireless communication function of the mobile terminal and the performance of the main antenna and the diversity antenna meet the standards.

With reference to the third aspect, in the first possible implementation manner of the third aspect, the radio frequency front-end circuit may further include a coupler and a switch, and the coupler is located in the main set of radio frequency front-end circuits in the radio frequency front-end circuit, and the main set of radio frequency The front-end circuit is used to transmit communication service signals, the switch includes a first input end of the switch, a second input end of the switch and an output end of the switch, and the output end of the switch is connected to the first power detection circuit, The whole machine coupling test method may further include: acquiring a coupling signal output after the coupler couples the communication service signal; inputting the test signal into the first input end of the switch, inputting the coupling signal into the second input end of the switch, and Switching and outputting the test signal and the coupling signal; wherein, outputting the test signal to the first power detection circuit includes: outputting the test signal or the coupling signal output from the output end of the switch to the first power detection circuit wherein, acquiring a result obtained by the first power detection circuit performing power detection on the test signal includes: acquiring a result obtained by the first power detection circuit performing power detection on the test signal or the coupled signal.

With reference to the above possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, the radio frequency front-end circuit may further include a coupler and a second power detection circuit, and the coupler is located in the radio frequency front-end circuit In the main set radio frequency front-end circuit, it is used for coupling the communication service signal emitted by the main set radio frequency front-end circuit to obtain the coupled signal, and the method for the whole machine coupling test further includes: obtaining the coupling output after coupling the communication service signal by the coupler signal; input the coupled signal into the second power detection circuit; obtain the result obtained by the second power detection circuit performing power detection on the coupled signal.

The overall coupling test method of the mobile terminal according to the embodiment of the present invention does not require external equipment such as a comprehensive tester, and only needs to perform power detection on the test signal transmitted by the main antenna received by the diversity antenna in the radio frequency front-end circuit. It can be determined whether the wireless communication function of the mobile terminal and the performance of the main antenna and the diversity antenna meet the standards, so as to realize the purpose of the whole machine coupling test. Thereby, the hardware cost during the whole-machine coupling test can be reduced.

On the other hand, by performing power detection on the test signal transmitted by the main antenna and received by the diversity antenna in the RF front-end circuit, the parallel detection of the main antenna and the diversity antenna can be realized, and the detection efficiency can be improved. In addition, since the coupling test of the whole machine is directly coupled by the main diversity antenna of the mobile terminal, no external coupling board is required, so the test error caused by the external coupling board in the conventional whole machine coupling test can be eliminated.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some implementations of the present invention. For example, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

FIG. 1 is a schematic block diagram of a radio frequency front-end circuit of a mobile terminal according to an embodiment of the present invention.

FIG. 2 is a schematic block diagram of a radio frequency front-end circuit of a mobile terminal according to another embodiment of the present invention.

FIG. 3 is a schematic block diagram of a radio frequency front-end circuit of a mobile terminal according to an embodiment of the present invention.

FIG. 4 is a schematic block diagram of a radio frequency front-end circuit of a mobile terminal according to an embodiment of the present invention.

FIG. 5 is a schematic block diagram of a radio frequency front-end circuit of a mobile terminal according to an embodiment of the present invention.

FIG. 6 is a schematic flowchart of a method for testing the whole-machine coupling of a mobile terminal according to an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that in the following description, when two elements are connected, the two elements may be directly connected or indirectly connected through one or more intermediate elements or media. The manner in which the two elements are connected may include contact or non-contact, or may include wired or wireless. Those skilled in the art may make equivalent substitutions or modifications to the example connections described below, and such substitutions or modifications fall within the scope of the present invention.

It should be understood that the radio frequency front-end circuit of the mobile terminal according to the embodiment of the present invention may be applicable to a mobile terminal supporting dual antennas of main set and diversity. Specifically, the diversity antenna technology utilizes the characteristics of irrelevance between independent samples of the same signal in the wireless propagation environment, and uses a certain signal combining technology to improve the received signal to resist the adverse effects of fading. In fact, antenna diversity technology has become the standard configuration of 3G and 4G mobile communication terminals. In implementation, the main set antenna is responsible for signal transmission and main set reception, and the diversity antenna is responsible for signal diversity reception.

FIG. 1 is a schematic block diagram of a radio frequency front-end circuit of a mobile terminal according to an embodiment of the present invention. The mobile terminal in the embodiment of the present invention may be a mobile phone, a network card, a data card, or the like. The RF front-end circuit includes a main antenna 110 , a diversity antenna 120 , a diversity antenna switch 130 and a first power detection circuit 140 .

The main set antenna 110 is used for transmitting radio frequency signals (eg, test signals), that is, converting the conducted radio frequency signals in the main set radio frequency front-end circuit in the radio frequency front-end circuit into electromagnetic waves.

The diversity antenna 120 utilizes the coupling effect between the main antenna 110 and the diversity antenna 120 to receive the test signal transmitted by the main antenna 110 .

The test signal may be a signal of a predetermined power transmitted when the mobile terminal enters the test mode, that is, FTM, and may be, for example, a signal transmitted by the main antenna 110 when the mobile terminal is in a non-signaling working state. The diversity antenna 120 may receive the signal of the predetermined power transmitted by the main antenna 110 .

The diversity antenna switch 130 includes an input terminal and an output terminal. The input terminal may be connected to the diversity antenna 120 and receive the test signal from the diversity antenna 120 . The output terminal outputs a test signal to the first power detection circuit 130 .

Optionally, the diversity antenna switch 130 may further include at least one second communication service signal output terminal, and the at least one second communication service signal output terminal is used to output the second communication received by the diversity antenna to the diversity receiving radio frequency circuit in the radio frequency front-end circuit. business signal.

The second communication service signal may be a signal transmitted by the network side and received by the diversity antenna 120 when the mobile terminal is in a normal working state (non-test mode). When a mobile terminal, such as a mobile phone, is in a normal working state, the diversity antenna 120 can receive a signal of a certain power transmitted by the base station at a certain moment, and can pass one of the corresponding output ends of the second communication service signal output ends of the diversity switch 130. output this signal.

The first power detection circuit 130 may perform power detection on the test signal output by the diversity antenna switch 130 to determine whether the wireless communication function of the mobile terminal and the performance of the main antenna and the diversity antenna meet the standards.

Specifically, by performing power detection on the test signal transmitted by the main antenna 110 and received by the diversity antenna 120, a corresponding measurement result can be obtained. By comparing the measurement result and the transmit power of the test signal, it can be determined whether the transmit power of the main antenna 110 and the received power of the diversity antenna 120 are normal, and then the wireless communication function of the mobile terminal and the main antenna 110 and the diversity antenna 120 can be determined. whether the performance meets the standard.

The radio frequency front-end circuit of the mobile terminal according to the embodiment of the present invention does not need to use external equipment such as a comprehensive tester, and only needs to perform power detection on the test signal transmitted by the main antenna received by the diversity antenna in the radio frequency front-end circuit, and then it can be determined Whether the wireless communication function of the mobile terminal and the performance of the main antenna and the diversity antenna meet the standards to achieve the purpose of the whole machine coupling test. Thereby, the hardware cost of the whole machine coupling test can be reduced.

On the other hand, by performing power detection on the test signal transmitted by the main antenna and received by the diversity antenna in the RF front-end circuit, the parallel detection of the main antenna and the diversity antenna can be realized, and the detection efficiency can be improved. In addition, since the coupling test of the whole machine is directly coupled by the main diversity antenna of the mobile terminal, no external coupling board is required, so the test error caused by the external coupling board in the conventional whole machine coupling test can be eliminated.

Optionally, as shown in FIG. 2 , the RF front-end circuit may further include a coupler 150 and a switch 160 .

The coupler 150 is located in the RF front-end circuit of the main set, and is used for coupling the first communication service signal transmitted by the RF front-end circuit of the main set to obtain the coupled signal.

The first communication service signal may be a signal transmitted by the main antenna when the mobile terminal is in a normal working state (non-test mode).

It should be understood that when the mobile terminal is in the test mode, the coupler 150 does not work or does not process the test signal.

Switch 160, the first input terminal of the switch is used for receiving the test signal, the second input terminal of the switch is used for receiving the coupling signal, and the output terminal of the switch is used for switching the output terminal of the switch to output the test signal to the first power detection circuit or coupled signal.

The toggle switch 160 may be a single-pole double-throw switch or a multi-throw switch. When the mobile terminal is in the test mode, the switch can output the test signal. When the mobile terminal is in a normal working state, the switch can output a coupling signal.

The first power detection circuit 140 is specifically configured to: perform power detection on the test signal or the coupled signal.

Alternatively, the first power detection circuit 140 may be an HDET circuit.

HDET is a standard technology for 3G and 4G mobile communication terminals. It is used to detect and control the size of the transmission power, so as to achieve the uplink and downlink closed-loop power control of communication to support the maximization of network capacity. Its implementation is to add a power coupler to the transmission path, couple the transmission power and output it to the HDET power detection circuit for detection, and close-loop control the adjustment of the transmission power according to the detection result.

In the embodiment of the present invention, the coupler 150 may be a directional coupler, which can realize the function of the above-mentioned power coupler, that is, the transmit power can be coupled and output to the HDET power detection circuit, such as the first power detection circuit 140, for power detection. , and close-loop control the adjustment of the transmit power according to the detection result.

Therefore, the radio frequency front-end circuit of the mobile terminal according to the embodiment of the present invention can support that the test signal is transmitted through the main antenna, received through the diversity antenna, and finally input to the first power detection circuit. The closed-loop control of coupled transmission and reception of the radio frequency signal (the first communication service signal) in the mobile terminal can be realized, and the power of the test signal received by the diversity antenna can be detected synchronously. On the premise that the power of the test signal transmitted by the main antenna is controllable and known, the first power detection circuit can determine the transmission of the main antenna, the reception of the diversity antenna, and the isolation of the main antenna and the diversity antenna. , to achieve the purpose of the whole machine coupling test.

Optionally, as shown in FIG. 3 , the RF front-end circuit may further include a coupler 170 and a second power detection circuit 180 .

The coupler 170 may be the above-mentioned coupler 150 , which will not be repeated here.

The second power detection circuit 180 may be configured to receive the coupled signal and perform power detection on the coupled signal.

Specifically, the radio frequency front-end circuit may include two power detection circuits, that is, a first power detection circuit 140 and a second power detection circuit 180 . The input end of the first power detection circuit 140 can be connected with the output end of the diversity antenna switch, and can perform power detection on the test signal output by the diversity antenna switch 130 to determine the wireless communication function of the mobile terminal and the difference between the main antenna and the diversity antenna. Whether the performance meets the standard. The second power detection circuit 180 can receive the coupled signal output by the coupler 170, and perform power detection on the coupled signal, so as to realize the closed-loop control of coupled transmission and reception of radio frequency signals in the mobile terminal.

That is to say, when the mobile terminal is in the test mode, that is, when the whole machine coupling test is performed, the first power detection circuit 140 is in a working state, and the second power detection circuit 180 is in a non-working state. When the mobile terminal is in a normal working state, the second power detection circuit 180 is in a working state, and the first power detection circuit 140 is in a non-working state.

The radio frequency front-end circuit of the mobile terminal according to the embodiment of the present invention can support that the test signal is transmitted through the main antenna, received through the diversity antenna, and finally input to the first power detection circuit. The second power detection circuit can realize closed-loop control of coupled transmission and reception of radio frequency signals (first communication service signals) in the mobile terminal, and the first power detection circuit can synchronously detect the power of the test signal received by the diversity antenna. On the premise that the power of the test signal transmitted by the main antenna is controllable and known, the first power detection circuit can determine the transmission of the main antenna, the reception of the diversity antenna, and the isolation of the main antenna and the diversity antenna. , to achieve the purpose of the whole machine coupling test.

The radio frequency front-end circuit of the mobile terminal according to the embodiment of the present invention will be described in detail below with reference to FIG. 4 and FIG. 5 .

As shown in FIG. 4 , when the mobile terminal is in the test mode, the main RF front-end circuit can generate a test signal, and the main antenna 210 transmits the test signal. After the coupling of the main and sub-antennas, the test signal is input to the diversity antenna switch 230 from the diversity antenna 220, and is input to one of the input ports of the switch 240 from the output channel n+1 of the diversity antenna switch 230. When the mobile terminal is in the non-test mode, the main RF front-end circuit may generate a first communication service signal, and the RF front-end circuit outputs a coupled signal of the first communication service signal, ie, a coupling signal, through the coupler 250 . The coupled signal may be input to another input port of the switch 240 . When the mobile terminal is in the test mode, the switch 240 outputs a test signal and inputs the test signal to the HDET power detection circuit 260, and the HDET power detection circuit 260 performs power detection on the test signal to determine the wireless communication function of the mobile terminal and the main Whether the performance of the set antenna and the diversity antenna meets the standard. When the mobile terminal is in the non-test mode, the switch 240 outputs the coupling signal, and inputs the test signal into the HDET power detection circuit 260, and the HDET power detection circuit 260 performs power detection on the coupled signal, so as to realize the coupling and transmission of radio frequency signals in the mobile terminal and receive closed-loop control.

On the other hand, when the mobile terminal is in the non-test mode, the diversity antenna 220 can also receive the second communication service signal sent by the network side such as the base station, and the second communication service signal can pass through the channel 1 to the channel n of the diversity antenna switch 230 One of the channels is input to the diversity receiving radio frequency circuit, and the second communication service signal is processed by the diversity receiving radio frequency circuit.

It should be understood that the HDET power detection circuit 260 may be the above-mentioned first power detection circuit 140 or the above-mentioned second power detection circuit 180, which is not limited in the present invention.

FIG. 5 is a radio frequency front-end circuit of a mobile terminal according to another embodiment of the present invention.

As shown in FIG. 5 , when the mobile terminal is in the test mode, the main RF front-end circuit can generate a test signal, and the main antenna 310 transmits the test signal. After the coupling of the main and sub-antennas, the test signal is input to the diversity antenna switch 330 from the diversity antenna 320 and input to the HDET power detection circuit 340 from the output channel n+1 of the diversity antenna switch 330 . The power detection of the test signal is performed by the HDET power detection circuit 340 to determine whether the wireless communication function of the mobile terminal and the performance of the main antenna and the diversity antenna meet the standards. When the mobile terminal is in the non-test mode, the main RF front-end circuit may generate a first communication service signal, and the RF front-end circuit outputs a coupled signal of the first communication service signal, ie, a coupling signal, through the coupler 360 . The coupled signal can be input to the HDET power detection circuit 350, and the HDET power detection circuit 350 performs power detection on the coupled signal to realize closed-loop control of coupled transmission and reception of radio frequency signals in the mobile terminal.

On the other hand, when the mobile terminal is in the non-test mode, the diversity antenna 320 can also receive the second communication service signal sent by the network side such as the base station, and the second communication service signal can pass through the channel 1 to the channel n of the diversity antenna switch 330 One of the channels is input to the diversity receiving radio frequency circuit, and the signal is processed by the diversity receiving radio frequency circuit.

The radio frequency front-end circuit of the mobile terminal according to the embodiment of the present invention is described in detail above with reference to FIG. 1 to FIG. 5 . The following describes a method for testing the overall coupling of a mobile terminal according to an embodiment of the present invention with reference to FIG. 6 . The whole machine coupling test method shown in FIG. 6 can be realized by the RF front-end circuit shown in FIG. 1 .

610. Acquire a test signal, where the test signal is a signal transmitted when the mobile terminal enters a test mode.

When performing the whole machine coupling test of the mobile terminal, the mobile terminal can be placed in the shielding device, and the shielding device can also be omitted under certain conditions. And establish a control connection with a control terminal, such as a personal computer, by wired or wireless means. The control terminal can control the mobile terminal to enter the test mode and transmit a predetermined power signal, that is, a test signal.

620. Receive the test signal transmitted by the main antenna from the diversity antenna.

630. Input the test signal to the diversity antenna switch, and output the test signal to the first power detection circuit.

640. Obtain a result obtained by performing power detection on the test signal by the first power detection circuit to determine whether the wireless communication function of the mobile terminal and the performance of the main antenna and the diversity antenna meet the standard.

The test signal is transmitted by the main set antenna, coupled through the main and sub-antennas, and input to the first power detection circuit through the diversity antenna switch. The first power detection circuit performs power detection on the test signal, and reports the detection result to the mobile terminal, and the mobile terminal then reports it to the control terminal. Whether it is successful, that is, it is determined whether the wireless communication function of the mobile terminal and the performance of the main antenna and the diversity antenna meet the standard.

The overall coupling test method of the mobile terminal according to the embodiment of the present invention does not require external equipment such as a comprehensive tester, and only needs to perform power detection on the test signal transmitted by the main antenna received by the diversity antenna in the radio frequency front-end circuit. It can be determined whether the wireless communication function of the mobile terminal and the performance of the main antenna and the diversity antenna meet the standards, so as to realize the purpose of the whole machine coupling test. Thereby, the hardware cost during the whole-machine coupling test can be reduced.

On the other hand, by performing power detection on the test signal transmitted by the main antenna and received by the diversity antenna in the RF front-end circuit, the parallel detection of the main antenna and the diversity antenna can be realized, and the detection efficiency can be improved. In addition, since the coupling test of the whole machine is directly coupled by the main diversity antenna of the mobile terminal, no external coupling board is required, so the test error caused by the external coupling board in the conventional whole machine coupling test can be eliminated.

610 , 620 , 630 , 640 of FIG. 6 may refer to the operation and function of the corresponding device, circuit or apparatus of FIG. 1 . It is taken as an example to avoid repetition and will not be repeated here.

Optionally, when the whole machine coupling test method is implemented by the radio frequency front-end circuit shown in FIG. 2 , the whole machine coupling test method may further include: acquiring the coupling signal output after coupling the communication service signal by the coupler; The test signal is input to the first input terminal of the switch, the coupling signal is input to the second input terminal of the switch, and the test signal and the coupling signal are switched and output; wherein, in 630, the output terminal of the switch can be The output test signal or coupling signal is output to the first power detection circuit; in 640, a result obtained by the first power detection circuit performing power detection on the test signal or the coupling signal may be obtained.

It should be understood that the communication service signal may be the above-mentioned first communication service signal.

For each step in the above-mentioned whole machine coupling test method, reference may be made to the operation and function of the corresponding device, circuit or device in FIG. 2 . It is taken as an example to avoid repetition and will not be repeated here.

Optionally, when the whole machine coupling test method is implemented by the radio frequency front-end circuit shown in FIG. 3 , the whole machine coupling test method may also include: acquiring the coupling signal output after the coupler couples the communication service signal. ; input the coupled signal into the second power detection circuit; obtain the result obtained by the second power detection circuit performing power detection on the coupled signal.

For each step in the above-mentioned whole machine coupling test method, reference may be made to the operation and function of the corresponding device, circuit or device in FIG. 3 . It is taken as an example to avoid repetition and will not be repeated here.

The overall coupling test method of the mobile terminal according to the embodiment of the present invention does not require external equipment such as a comprehensive tester, and only needs to perform power detection on the test signal transmitted by the main antenna received by the diversity antenna in the radio frequency front-end circuit. It can be determined whether the wireless communication function of the mobile terminal and the performance of the main antenna and the diversity antenna meet the standards, so as to realize the purpose of the whole machine coupling test. Thereby, the hardware cost during the whole-machine coupling test can be reduced.

On the other hand, by performing power detection on the test signal transmitted by the main antenna and received by the diversity antenna in the RF front-end circuit, the parallel detection of the main antenna and the diversity antenna can be realized, and the detection efficiency can be improved. In addition, since the coupling test of the whole machine is directly coupled by the main diversity antenna of the mobile terminal, no external coupling board is required, so the test error caused by the external coupling board in the conventional whole machine coupling test can be eliminated. Those of ordinary skill in the art will appreciate that the various example devices, circuits or devices and related operations described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of the present invention.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described systems, devices and units may refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, Read-Only Memory (ROM, Read-Only Memory), Random Access Memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes .

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention. should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

It should be understood that, in various embodiments of the present invention, the size of the sequence numbers of the above-mentioned processes does not mean the sequence of execution, and the execution sequence of each process should be determined by its functions and internal logic, rather than the embodiments of the present invention. implementation constitutes any limitation.

Claims (10)

1. a radio frequency front-end circuit of a mobile terminal, is characterized in that, comprises: Main set antenna, diversity antenna, diversity antenna switch and first power detection circuit; The diversity antenna utilizes the coupling effect between the main antenna and the diversity antenna to receive a test signal transmitted by the main antenna, wherein the test signal is a signal transmitted when the mobile terminal enters a test mode; The input end of the diversity antenna switch is connected to the diversity antenna, and is used for receiving the test signal from the diversity antenna, and the output end of the diversity antenna switch is used for outputting the first power detection circuit. test signal; The first power detection circuit is used to perform power detection on the test signal and output a measurement result, and the measurement result and the transmit power of the test signal are used to determine the wireless communication function of the mobile terminal and the main Whether the performance of the set antenna and the diversity antenna meets the standard; the radio frequency front-end circuit also includes: a coupler, where the coupler is located in the main set of radio frequency front-end circuits in the radio frequency front-end circuit, and is used for coupling the first communication service signal transmitted by the main set of radio frequency front-end circuits to obtain the coupled signal; a switch, the first input of the switch is used to receive the test signal, the second input of the switch is used to receive the coupling signal, the switch is used to switch the output of the switch The terminal outputs the test signal or the coupling signal to the first power detection circuit; Wherein, the first power detection circuit is specifically used for: Power detection is performed on the test signal or the coupled signal. 2 . The radio frequency front-end circuit according to claim 1 , wherein the diversity antenna switch further comprises at least one second communication service signal output terminal, and the at least one second communication service signal output terminal is used to send the signal to the The diversity receiving radio frequency circuit in the radio frequency front-end circuit outputs the second communication service signal received by the diversity antenna. 3 . The radio frequency front-end circuit according to claim 1 , wherein the switch is a single-pole double-throw switch or a multi-throw switch. 4 . 4 . The radio frequency front-end circuit according to claim 1 , wherein the first power detection circuit is a high-power detection HDET circuit. 5 . 5. A radio frequency front-end circuit of a mobile terminal, characterized in that, comprising: Main set antenna, diversity antenna, diversity antenna switch and first power detection circuit; The diversity antenna utilizes the coupling effect between the main antenna and the diversity antenna to receive a test signal transmitted by the main antenna, wherein the test signal is a signal transmitted when the mobile terminal enters a test mode; The input end of the diversity antenna switch is connected to the diversity antenna, and is used for receiving the test signal from the diversity antenna, and the output end of the diversity antenna switch is used for outputting the first power detection circuit. test signal; The first power detection circuit is used to perform power detection on the test signal and output a measurement result, and the measurement result and the transmit power of the test signal are used to determine the wireless communication function of the mobile terminal and the main Whether the performance of the collective antenna and the diversity antenna conforms to the standard; The radio frequency front-end circuit also includes: a coupler, where the coupler is located in the main set of radio frequency front-end circuits in the radio frequency front-end circuit, and is used for coupling the first communication service signal transmitted by the main set of radio frequency front-end circuits to obtain the coupled signal; The second power detection circuit is configured to receive the coupled signal and perform power detection on the coupled signal. 6. The radio frequency front-end circuit according to claim 5, wherein the diversity antenna switch further comprises at least one second communication service signal output terminal, and the at least one second communication service signal output terminal is used to send the signal to the The diversity receiving radio frequency circuit in the radio frequency front-end circuit outputs the second communication service signal received by the diversity antenna. 7. The radio frequency front-end circuit according to claim 5 or 6, wherein the first power detection circuit is a high-power detection HDET circuit. 8. A mobile terminal, comprising the radio frequency front-end circuit according to any one of claims 1 to 7. 9. A complete machine coupling test method for a mobile terminal, wherein the complete machine coupling test method is applied in a radio frequency front-end circuit of the mobile terminal, and the radio frequency front-end circuit comprises a main set antenna, a diversity antenna, a diversity antenna An antenna switch and a first power detection circuit, the input end of the diversity antenna switch is connected to the diversity antenna, the output end of the diversity antenna switch is connected to the first power detection circuit, the whole machine coupling test Methods include: acquiring a test signal, wherein the test signal is a signal transmitted when the mobile terminal enters a test mode; receiving the test signal transmitted by the primary antenna from the diversity antenna; inputting the test signal into the diversity antenna switch, and outputting the test signal to the first power detection circuit; Obtain the result obtained by the first power detection circuit performing power detection on the test signal, and the result and the transmit power of the test signal are used to determine the wireless communication function of the mobile terminal and the main antenna and all Whether the performance of the above-mentioned diversity antenna meets the standard; The radio frequency front-end circuit further includes a coupler and a switch, the coupler is located in the main set of radio frequency front-end circuits in the radio frequency front-end circuit, the main set of radio frequency front-end circuits are used for transmitting communication service signals, and the switch It includes a first input terminal of the switch, a second input terminal of the switch, and an output terminal of the switch, and the output terminal of the switch is connected to the first power detection circuit. Machine coupling test methods also include: acquiring a coupled signal output by the coupler after coupling the communication service signal; inputting the test signal into the first input terminal of the switch, inputting the coupling signal into the second input terminal of the switch, and switching the test signal and the coupling signal for output; Wherein, the outputting the test signal to the first power detection circuit includes: outputting the test signal or the coupling signal output from the output end of the switch to the first power detection circuit; Wherein, the obtaining a result obtained by performing power detection on the test signal by the first power detection circuit includes: Obtain a result obtained by performing power detection on the test signal or the coupled signal by the first power detection circuit. 10. A complete machine coupling test method for a mobile terminal, wherein the complete machine coupling test method is applied to a radio frequency front-end circuit of the mobile terminal, and the radio frequency front-end circuit comprises a main set antenna, a diversity antenna, a diversity antenna An antenna switch and a first power detection circuit, the input end of the diversity antenna switch is connected to the diversity antenna, the output end of the diversity antenna switch is connected to the first power detection circuit, the whole machine coupling test Methods include: acquiring a test signal, wherein the test signal is a signal transmitted when the mobile terminal enters a test mode; receiving the test signal transmitted by the primary antenna from the diversity antenna; inputting the test signal into the diversity antenna switch, and outputting the test signal to the first power detection circuit; Obtain the result obtained by the first power detection circuit performing power detection on the test signal, and the result and the transmit power of the test signal are used to determine the wireless communication function of the mobile terminal and the main antenna and all Whether the performance of the above-mentioned diversity antenna meets the standard; The radio frequency front-end circuit further includes a coupler and a second power detection circuit, the coupler is located in the main set of radio frequency front-end circuits in the radio frequency front-end circuit, and the main set of radio frequency front-end circuits is used to transmit communication service signals, so the The whole machine coupling test method also includes: acquiring a coupled signal output by the coupler after coupling the communication service signal; inputting the coupled signal into the second power detection circuit; Obtain a result obtained by performing power detection on the coupled signal by the second power detection circuit.

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