CN107294557A - The RF front-end circuit and complete-machine coupling method of testing of mobile terminal - Google Patents

Abstract

The embodiment of the present invention provides a radio frequency front-end circuit of a mobile terminal and a coupling test method of the whole machine. 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 emitted 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 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 detect the power of the test signal, so as to realize the coupling test of the mobile terminal, so that the dependence on the comprehensive tester can be eliminated, and the whole system can be reduced. The hardware cost of machine-coupled testing.

Description

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

technical field

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

Background technique

After the production and assembly of mobile terminals such as mobile phones, network cards, and data cards, the coupling test of the whole machine 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 there is a good match between the antenna and the main board. 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 transmitting power of the main antenna and the receiving power of the diversity antenna Whether the function is normal and whether the antenna performance meets the standard.

The coupling test of the whole machine mainly uses the coupling plate 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 antenna whole machine coupling test and the diversity antenna whole machine coupling test.

1. The coupling test process of the main set 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 (Radio Frequency, RF) channel of the comprehensive tester according to the calibrated coupling loss value. Then it is judged 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, a corresponding session is started, and downlink pilot signaling is obtained, and a new test channel is switched. And configure the parameters of the comprehensive tester during the maximum transmit power test. Finally, read the maximum transmission 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 result.

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, set the mode of the mobile terminal to be tested as the receiving mode, and open the diversity channel of the mobile terminal to be tested, and set the gain level of the low noise amplifier (Low Noise Amplifier, LNA) to LNA0. After configuring the downlink channel and downlink power of the instrument to -80.0dBm, obtain the receiving automatic gain control (Automatic Gain Control, AGC) value from the mobile terminal to be tested, and convert it into receiving power, and judge whether the power value is within the test index within range. If not, return failure and exit the test; if it does, close the diversity channel.

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

Contents of the invention

The embodiment of the present invention provides 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 set 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 terminal of the diversity antenna switch is connected to the diversity antenna for receiving test signals from the diversity antenna, and the output terminal of the diversity antenna switch is used for outputting test signals to the first power detection circuit.

The first power detection circuit is used for power detection of 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 of the embodiment of the present invention does not need external devices 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 it can be determined Whether the wireless communication function of the mobile terminal and the performance of the main set antenna and the diversity antenna meet the standards, and realize the purpose of the whole machine coupling test. Therefore, the hardware cost during the coupling test of the whole machine can be reduced.

On the other hand, by performing power detection on the test signal transmitted by the main antenna received by the diversity antenna in the radio frequency 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, during the whole machine coupling test, the main diversity antenna of the mobile terminal is directly used for coupling without an external coupling board, thereby eliminating the test error caused by the external coupling board in the conventional whole machine coupling test.

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 radio frequency front-end circuit of the radio frequency front-end circuit, and is used for coupling the first communication service signal transmitted by the main radio frequency front-end circuit to obtain a coupled signal.

The first input end of the switch is used to receive the test signal, the second input end of the switch is used to receive the coupling signal, and the switch is used to switch the output end 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 coupling signal.

The radio frequency front-end circuit of the mobile terminal in the embodiment of the present invention can support the test signal to be transmitted through the main antenna, then received through the diversity antenna, and finally input to the first power detection circuit. It can not only realize the closed-loop control of radio frequency signal (first communication service signal) coupled transmission and reception in the mobile terminal, but also 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 judge the abnormality of the transmission of the main antenna, the reception of the diversity antenna, the isolation of the main antenna and the diversity antenna, etc. , to achieve the purpose of machine coupling test.

With reference to the foregoing possible implementation manner 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 radio frequency front-end circuit of the radio frequency front-end circuit, and is used for coupling the first communication service signal transmitted by the main radio frequency front-end circuit to obtain a 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 in the embodiment of the present invention can support the test signal to be transmitted through the main antenna, then received through the diversity antenna, and finally input to the first power detection circuit. The closed-loop control of radio frequency signal (first communication service signal) coupled transmission and reception in the mobile terminal can be realized through the second power detection circuit, and the power of the test signal received by the diversity antenna can be detected synchronously through the first power detection circuit. 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 judge the abnormality of the transmission of the main antenna, the reception of the diversity antenna, the isolation of the main antenna and the diversity antenna, etc. , to achieve the purpose of machine coupling test.

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

With reference to the foregoing possible implementation manner 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.

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

In the third aspect, a method for testing the coupling of a mobile terminal is provided. The coupling testing method for a mobile terminal is applied to a radio frequency front-end circuit of a mobile terminal. The radio frequency front-end circuit includes a main antenna, a diversity antenna, a diversity antenna switch and a second antenna. A power detection circuit, the input end of the diversity antenna switch is connected to the diversity antenna, and the output end of the diversity antenna switch is connected to the first power detection circuit. The whole machine coupling test method includes: obtaining a test signal, wherein the test signal is a mobile terminal The signal transmitted when entering the test mode; receiving the test signal transmitted by the main set 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; obtaining the first power detection circuit to test the 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 set antenna and the diversity antenna meet the standard.

With reference to the third aspect, in the first possible implementation of the third aspect, the radio frequency front-end circuit may further include a coupler and a switch, the coupler is located in the main radio frequency front-end circuit in the radio frequency front-end circuit, and the main 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 also include: obtaining a coupling signal output by the coupler after coupling 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 switching switch to the first power detection circuit ; Wherein, obtaining the result obtained by the first power detection circuit for power detection of the test signal includes: obtaining the result obtained by the first power detection circuit for power detection of the test signal or the coupled signal.

With reference to the above possible implementation of the third aspect, in a second possible implementation 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 to couple the communication service signal transmitted by the main set radio frequency front end circuit to obtain the coupled signal. signal; inputting the coupled signal into the second power detection circuit; obtaining a result obtained by the second power detection circuit performing power detection on the coupled signal.

The whole machine coupling test method of the mobile terminal in the embodiment of the present invention does not need 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 determine whether the wireless communication function of the mobile terminal and the performance of the main set antenna and the diversity antenna meet the standard, and realize the purpose of the whole machine coupling test. Therefore, the hardware cost when performing 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 received by the diversity antenna in the radio frequency 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, during the whole machine coupling test, the main diversity antenna of the mobile terminal is directly used for coupling without an external coupling board, thereby eliminating the test error caused by the external coupling board in the conventional whole machine coupling test.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or prior art. Obviously, the accompanying drawings in the following description are some implementations of the present invention For example, those of ordinary skill in the art can also obtain other drawings based on these drawings on the premise of not paying creative efforts.

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 flow chart of a method for testing the whole machine coupling of a mobile terminal according to an embodiment of the present invention.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts 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 may be indirectly connected through one or more intermediate elements or media. The manner in which two elements are connected may include a contact manner or a non-contact manner, or may include a wired manner or a wireless manner. Those skilled in the art may make equivalent substitutions or modifications to the example connections described below, and such substitutions or modifications all 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 diversity. Specifically, the diversity antenna technology utilizes the uncorrelated characteristics of independent samples of the same signal in the wireless propagation environment, and uses a certain signal combination technology to improve the received signal and resist the adverse effects of fading. In fact, antenna diversity technology has become the standard configuration of 3G and 4G mobile communication terminals. In terms of 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, and the like. The radio frequency 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 (such as test signals), that is, to convert 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 with a predetermined power transmitted when the mobile terminal enters the test mode, that is, FTM, for example, it may be a signal transmitted by the main antenna 110 when the mobile terminal is in a non-signaling working state. The diversity antenna 120 can receive the signal of the predetermined power transmitted by the main antenna 110 .

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

Optionally, the diversity antenna switch 130 may also include at least one second communication service signal output terminal, at least one second communication service signal output terminal is used to output the second communication received by the diversity antenna to the diversity reception 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 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, at a certain moment, the diversity antenna 120 can receive a signal of a certain power transmitted by the base station, and can pass through one of the corresponding output terminals of the second communication service signal output terminals of the diversity switch 130 output this signal.

The first power detection circuit 130 can 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 received by the diversity antenna 120, a corresponding measurement result can be obtained. By comparing the transmission power of the measurement result and the test signal, it can be judged whether the transmission power of the main antenna 110 and the reception 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 of the embodiment of the present invention does not need external devices 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 it can be determined Whether the wireless communication function of the mobile terminal and the performance of the main set antenna and the diversity antenna meet the standards, and realize the purpose of the whole machine coupling test. Therefore, the hardware cost during the coupling test of the whole machine can be reduced.

On the other hand, by performing power detection on the test signal transmitted by the main antenna received by the diversity antenna in the radio frequency 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, during the whole machine coupling test, the main diversity antenna of the mobile terminal is directly used for coupling without an external coupling board, thereby eliminating the test error caused by the external coupling board in the conventional whole machine coupling test.

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

The coupler 150 is located in the main radio frequency front-end circuit, and is used for coupling the first communication service signal transmitted by the main radio frequency front-end circuit to obtain a 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 process the test signal.

Switch 160, the first input end of the switch is used to receive the test signal, the second input end of the switch is used to receive the coupling signal, and the switch is used to switch the output end 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 switching switch can output a test signal. When the mobile terminal is in a normal working state, the switching 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 coupling signal.

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

HDET is a standard configuration technology for 3G and 4G mobile communication terminals. It is used to detect and control the size of the transmission power, so as to realize the closed-loop power control of uplink and downlink communication, and to support the maximization of network capacity. In fact, a power coupler is added to the transmission path, and the transmission power is coupled and output to the HDET power detection circuit for detection, and the adjustment of the transmission power is controlled in a closed loop according to the detection result.

In the embodiment of the present invention, the coupler 150 can be a directional coupler, which can realize the function of the above-mentioned power coupler, that is, can output the transmitted power to the HDET power detection circuit after coupling, such as the first power detection circuit 140, for power detection , and adjust the transmission power according to the closed-loop control of the detection result.

Therefore, the radio frequency front-end circuit of the mobile terminal in the embodiment of the present invention can support the test signal to be transmitted through the main antenna, then received through the diversity antenna, and finally input to the first power detection circuit. It can not only realize the closed-loop control of radio frequency signal (first communication service signal) coupled transmission and reception in the mobile terminal, but also 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 judge the abnormality of the transmission of the main antenna, the reception of the diversity antenna, the isolation of the main antenna and the diversity antenna, etc. , to achieve the purpose of machine coupling test.

Optionally, as shown in FIG. 3 , the radio frequency 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 diversity antenna switch, can carry out power detection to the test signal that diversity antenna switch 130 outputs, to determine the mobile terminal's wireless communication function and main set antenna and diversity antenna performance is up to 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 radio frequency signal coupled transmission and reception 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 the working state, and the second power detection circuit 180 is in the 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 in the embodiment of the present invention can support the test signal to be transmitted through the main antenna, then received through the diversity antenna, and finally input to the first power detection circuit. The closed-loop control of radio frequency signal (first communication service signal) coupled transmission and reception in the mobile terminal can be realized through the second power detection circuit, and the power of the test signal received by the diversity antenna can be detected synchronously through the first power detection circuit. 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 judge the abnormality of the transmission of the main antenna, the reception of the diversity antenna, the isolation of the main antenna and the diversity antenna, etc. , to achieve the purpose of 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 radio frequency front-end circuit can generate a test signal, and the test signal is transmitted by the main antenna 210 . Through the coupling of the main antenna and the antenna, the test signal is input into the diversity antenna switch 230 from the diversity antenna 220 , and is input into one of the input ports of the switching switch 240 through the output channel n+1 of the diversity antenna switch 230 . When the mobile terminal is in the non-test mode, the main radio frequency front-end circuit can generate the first communication service signal, and output the coupled signal of the first communication service signal through the coupler 250 in the radio frequency front-end circuit, that is, the coupling signal. The coupled signal can be input into another input port of the changeover switch 240 . When the mobile terminal is in the test mode, the switch 240 outputs a test signal, and the test signal is input into the HDET power detection circuit 260, and the power detection of the test signal is carried out by the HDET power detection circuit 260 to determine the wireless communication function and the main function of the mobile terminal. Whether the performance of the collection antenna and the diversity antenna meets the standard. When the mobile terminal is in the non-test mode, the switching switch 240 outputs the coupling signal, and the test signal is input to the HDET power detection circuit 260, and the power detection circuit 260 performs power detection on the coupling signal to realize the radio frequency signal coupling transmission 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 a diversity receiving radio frequency circuit, and the diversity receiving radio frequency circuit processes the second communication service signal.

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 radio frequency front-end circuit can generate a test signal, and the test signal is transmitted by the main antenna 310 . Through the coupling of the main antenna and the antenna, the test signal is input into the diversity antenna switch 330 from the diversity antenna 320 , and is input into the HDET power detection circuit 340 through the output channel n+1 of the diversity antenna switch 330 . And the HDET power detection circuit 340 performs 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 standards. When the mobile terminal is in the non-test mode, the radio frequency front-end circuit of the main set can generate the first communication service signal, and output the coupled signal of the first communication service signal through the coupler 360 in the radio frequency front-end circuit, that is, the coupling signal. The coupled signal can be input into the HDET power detection circuit 350, and the HDET power detection circuit 350 performs power detection on the coupled signal, so as to realize closed-loop control of radio frequency signal coupled transmission and reception 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 be transmitted 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 the whole machine coupling testing method of the mobile terminal according to the 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 radio frequency 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 carrying out 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 if certain conditions are met. And establish a control connection with the 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, from the diversity antenna, the test signal transmitted by the main set antenna.

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

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

The test signal is transmitted by the main set antenna, coupled by the main and sub-antennas, and input to the first power detection circuit through the diversity antenna switch. The first power detection circuit detects the power of the test signal, and reports the detection result to the mobile terminal, and the mobile terminal then reports to the control terminal, and the control terminal judges the coupling test of the whole machine according to the calibrated and verified data as the judgment standard Whether it is successful, that is, 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 whole machine coupling test method of the mobile terminal in the embodiment of the present invention does not need 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 determine whether the wireless communication function of the mobile terminal and the performance of the main set antenna and the diversity antenna meet the standard, and realize the purpose of the whole machine coupling test. Therefore, the hardware cost when performing 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 received by the diversity antenna in the radio frequency 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, during the whole machine coupling test, the main diversity antenna of the mobile terminal is directly used for coupling without an external coupling board, thereby eliminating the test error caused by the external coupling board in the conventional whole machine coupling test.

610 , 620 , 630 , and 640 in FIG. 6 may refer to operations and functions of corresponding devices, circuits or devices in FIG. 1 . As an example to avoid repetition, it 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. The test signal is input to the first input end of the switch, the coupling signal is input to the second input end 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 of power detection of the test signal or coupling signal by the first power detection circuit may be acquired.

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

For each step in the above whole machine coupling testing method, reference may be made to the operation and function of the corresponding device, circuit or device in FIG. 2 . As an example to avoid repetition, it 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: obtaining the coupling signal output by the coupler after coupling the communication service signal ; Inputting the coupled signal into the second power detection circuit; acquiring a power detection result of the coupled signal by the second power detection circuit.

For each step in the above whole machine coupling testing method, reference may be made to the operation and function of the corresponding device, circuit or device in FIG. 3 . As an example to avoid repetition, it will not be repeated here.

The whole machine coupling test method of the mobile terminal in the embodiment of the present invention does not need 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 determine whether the wireless communication function of the mobile terminal and the performance of the main set antenna and the diversity antenna meet the standard, and realize the purpose of the whole machine coupling test. Therefore, the hardware cost when performing 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 received by the diversity antenna in the radio frequency 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, during the whole machine coupling test, the main diversity antenna of the mobile terminal is directly used for coupling without an external coupling board, thereby eliminating the test error caused by the external coupling board in the conventional whole machine coupling test. Those skilled in the art can appreciate that the devices, circuits or devices and related operations described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present invention.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods may be implemented in other ways. For example, the device 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 can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

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

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

If the functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in 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 is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered 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 sequence numbers of the above-mentioned processes do not mean the order of execution, and the execution order of each process should be determined by its functions and internal logic, rather than by the embodiment of the present invention. The implementation process constitutes any limitation.

Claims (10)

1. 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 set antenna and the diversity antenna to receive the test signal transmitted by the main set antenna; The input terminal of the diversity antenna switch is connected to the diversity antenna for receiving the test signal from the diversity antenna, and the output terminal of the diversity antenna switch is used for outputting the test signal; 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. 2. radio frequency front-end circuit as claimed in claim 1, is characterized in that, described radio frequency front-end circuit also comprises: a coupler, the coupler is located in the main radio frequency front-end circuit in the radio frequency front-end circuit, and is used to couple the first communication service signal transmitted by the main radio frequency front-end circuit to obtain a coupled signal; A switch, the first input end of the switch is used to receive the test signal, the second input end of the switch is used to receive the coupling signal, the switch is used to switch the output of the switch outputting 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. 3. radio frequency front-end circuit as claimed in claim 1, is characterized in that, described radio frequency front-end circuit also comprises: a coupler, the coupler is located in the main radio frequency front-end circuit in the radio frequency front-end circuit, and is used to couple the first communication service signal transmitted by the main radio frequency front-end circuit to obtain a coupled signal; The second power detection circuit is configured to receive the coupled signal and perform power detection on the coupled signal. 4. The radio frequency front-end circuit according to any one of claims 1 to 3, wherein the diversity antenna switch also includes at least one second communication service signal output terminal, and the at least one second communication service signal output terminal The terminal is used to output the second communication service signal received by the diversity antenna to the diversity reception radio frequency circuit in the radio frequency front-end circuit. 5. The radio frequency front-end circuit according to claim 2, wherein the switch is a single-pole double-throw switch or a multi-throw switch. 6. The radio frequency front-end circuit according to any one of claims 1 to 5, wherein the first power detection circuit is a high power detection HEDT circuit. 7. A mobile terminal, characterized by comprising the radio frequency front-end circuit according to any one of claims 1 to 6. 8. A whole machine coupling test method of a mobile terminal, characterized in that, the whole machine coupling test method is applied in the 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 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, and the whole machine coupling test Methods include: Obtaining 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 main set 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; Acquiring the result obtained by the first power detection circuit of the power detection of the test signal, so as 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. 9. The whole machine coupling test method as claimed in claim 8, wherein the radio frequency front-end circuit also includes a coupler and a switch, and the coupler is located in the main set radio frequency front-end circuit in the radio frequency front-end circuit , the radio frequency front-end circuit of the main set is used for transmitting communication service signals, and the switch includes a first input terminal of the switch, a second input terminal of the switch and an output terminal of the switch, the The output end of the switch is connected to the first power detection circuit, and the whole machine coupling test method also includes: Obtain a coupling 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 and outputting the test signal and the coupling signal; Wherein, the outputting the test signal to the first power detection circuit includes: outputting the test signal or the coupled signal output from the output terminal of the changeover switch to the first power detection circuit; Wherein, the acquiring the result obtained by the first power detection circuit performing power detection on the test signal includes: Acquiring a power detection result obtained by the first power detection circuit on the test signal or the coupled signal. 10. The whole machine coupling test method as claimed in claim 8, the radio frequency front-end circuit also includes a coupler and a second power detection circuit, the coupler is located in the main set radio frequency front-end circuit in the radio frequency front-end circuit, The radio frequency front-end circuit of the main set is used to transmit communication service signals, and the coupling test method of the whole machine also includes: Obtain a coupling signal output by the coupler after coupling the communication service signal; inputting the coupled signal into the second power detection circuit; Acquiring a result obtained by the second power detection circuit performing power detection on the coupled signal.