CN103728502B - The method and system and wireless terminal of a kind of antenna measurement - Google Patents

Abstract

The invention provides a method and system for antenna testing, as well as a wireless terminal, relating to the field of antennas, capable of reducing the false detection rate of antenna testing. The method is applied to a wireless terminal. The wireless terminal includes an antenna and a test circuit. One end of the test circuit is electrically connected to the antenna, and the other end is electrically connected to a test device outside the wireless terminal. The method includes: the The test circuit receives the test signal sent by the test equipment, and transmits the test signal to the antenna; the test circuit receives the reflected signal corresponding to the test signal reflected by the antenna, and transmits the reflected signal to the antenna. The signal is transmitted to the test equipment, so that the test equipment determines the parameters of the antenna according to the test signal and the reflected signal. The invention is used in antenna test technology.

Description

Method and system for antenna testing, and wireless terminal

technical field

The present invention relates to the field of antennas, in particular to a method and system for testing antennas, and a wireless terminal.

Background technique

With the enrichment of wireless applications, more and more antennas are integrated into the same wireless terminal. For example, on consumer wireless terminals such as mobile phones, tablet computers, and multi-function players, Global Positioning System (Global Positioning System, GPS), Wireless Fidelity (Wireless Fidelity, Wi-Fi), Global System for Mobile Communications ( Global System for Mobile Communications (GSM)/Code Division Multiple Access (CDMA)/Universal Mobile Telecommunications System (UMTS), Near Field Communication (NFC) and other communication systems And its corresponding multiple antennas. Therefore, the workload of antenna testing is relatively large. How to efficiently check whether the performance of each antenna is qualified has become a difficult problem in current research and development and production.

Such a solution for testing antennas is provided in the prior art: firstly, the wireless terminal and its antennas are placed at specified positions in a test environment such as a shielding box or a triangular cone. Then, the computer sends a group of AT (Attention) commands to control the antenna to emit electromagnetic waves, and the test environment receives the electromagnetic waves emitted by the antenna and sends the electromagnetic waves to the simulated base station through the RF cable (RF Cable). Next, simulate the base station to receive the above-mentioned electromagnetic waves and analyze the parameters such as the transmitting power of the antenna. The computer obtains the above parameters from the simulated base station and judges whether they are within a given range, so as to determine whether the performance of the antenna is qualified.

However, the above solution requires very precise antenna location in the test environment. Even if the antenna location has a slight deviation from the specified location, the parameters such as the antenna's transmit power and other parameters analyzed by the simulated base station will vary greatly. Variety. It can be seen that since this solution is very sensitive to the position of the antenna, it is easy to cause a high false detection rate of the antenna test.

Contents of the invention

Embodiments of the present invention provide a method and system for antenna testing, as well as a wireless terminal, which can reduce the false detection rate of antenna testing.

In order to achieve the above object, embodiments of the present invention adopt the following technical solutions:

In the first aspect, a method for testing an antenna is provided, which is applied to a wireless terminal, and the wireless terminal includes an antenna, wherein the wireless terminal further includes a test circuit, one end of the test circuit is electrically connected to the antenna, and the other One end is electrically connected to the test equipment outside the wireless terminal, and the method includes:

The test circuit receives a test signal sent by the test device, and transmits the test signal to the antenna;

The test circuit receives a reflection signal corresponding to the test signal reflected by the antenna, and transmits the reflection signal to the test device, so that the test device Determine the parameters of the antenna.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the passband of the test circuit is outside the working frequency band of the antenna, and the frequency of the test signal is within the working frequency band of the antenna. outside frequency.

With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the test circuit includes any one of a high-pass circuit, a low-pass circuit, and a band-stop circuit.

With reference to the first aspect or any of the first to second possible implementations of the first aspect, in the third possible implementation of the first aspect, the parameters include at least one of the following parameters : return loss, voltage standing wave ratio.

In a second aspect, a wireless terminal is provided, the wireless terminal includes an antenna, and the wireless terminal further includes a test circuit, one end of the test circuit is electrically connected to the antenna, and the other end is electrically connected to a test device outside the wireless terminal;

The test circuit is used to receive and transmit the test signal sent by the test equipment to the antenna;

The antenna is configured to receive the test signal and reflect a reflected signal corresponding to the test signal;

The test circuit is further configured to: receive and transmit the reflected signal of the antenna to the test device, so that the test device determines the parameters of the antenna according to the test signal and the reflected signal.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the passband of the test circuit is outside the working frequency band of the antenna, and the frequency of the test signal is within the working frequency band of the antenna. outside frequency.

With reference to the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the test circuit includes any one of a high-pass circuit, a low-pass circuit, and a band-stop circuit.

With reference to the second possible implementation of the second aspect, in a third possible implementation of the second aspect, the test circuit includes at least one set of test circuits, the antenna is at least one antenna, and the test The circuits correspond to the antennas one by one, and the passband of the test circuit is outside the working frequency band of the corresponding antenna;

The test circuit is used to receive and transmit the test signal sent by the test equipment to the corresponding antenna;

The antenna is configured to receive the test signal and reflect a reflected signal corresponding to the test signal;

The test circuit is further configured to: receive and transmit the reflection signal of the corresponding antenna to the test equipment, so that the test equipment determines the parameters of the antenna according to the test signal and the reflection signal.

With reference to the second possible implementation of the second aspect, in a fourth possible implementation of the second aspect, the test circuit is a test circuit with an adjustable passband, and the antennas are multiple antennas;

The test circuit is configured to receive and transmit a test signal sent by the test device to the antenna under test, where the antenna under test is the antenna currently being tested among the plurality of antennas;

The antenna under test is used to receive the test signal and reflect a reflected signal corresponding to the test signal;

The test circuit is further configured to: receive and transmit the reflected signal of the antenna to be tested to the test equipment, so that the test equipment determines the parameters of the antenna according to the test signal and the reflected signal;

Wherein, the passband adjustment of the test circuit is outside the working frequency band of the antenna under test.

With reference to the second aspect or any of the first to fourth possible implementation manners of the second aspect, in a fifth possible implementation manner of the second aspect, the wireless terminal further includes an interface for electrically connecting the the test circuit and the test equipment.

In a third aspect, a system for antenna testing is provided, including a wireless terminal and testing equipment, the wireless terminal includes an antenna, and the wireless terminal further includes a test circuit, one end of the test circuit is electrically connected to the antenna, and the other end is electrically connected to the antenna. connecting said test equipment;

The test equipment sends a test signal;

the test circuit receives and transmits the test signal to the antenna;

The antenna receives the test signal and reflects a reflected signal corresponding to the test signal;

the test circuit receives and transmits the reflected signal to the test equipment;

The testing device receives the reflection signal and determines the parameters of the antenna according to the test signal and the reflection signal.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the passband of the test circuit is outside the working frequency band of the antenna, and the frequency of the test signal is within the working frequency band of the antenna. outside frequency.

With reference to the first possible implementation of the third aspect, in a second possible implementation of the third aspect, the system further includes a tuning circuit, one end of the tuning circuit is electrically connected to the test circuit, and the other end electrically connecting the test equipment;

The tuning circuit is used for: optimizing the reflected signal.

According to the method and system for antenna testing and the wireless terminal provided by the embodiments of the present invention, the antenna receives the test signal sent by the test device via the test circuit, and then transmits the reflected signal corresponding to the test signal reflected by the antenna through the same The test circuit is sent to the test equipment. In this way, the test device can determine the parameters of the antenna according to the test signal and the reflected signal, thereby implementing antenna testing. Compared with the prior art where the wireless terminal needs to be placed in the test environment for testing and the position of the antenna in the test environment is required to be very precise, the antenna test method provided by the present invention can skillfully utilize the internal test of the wireless terminal The circuit performs the antenna test, thereby avoiding the problem of a high false detection rate caused by harsh test conditions and the like, and therefore reducing the false detection rate of the antenna test.

Description of drawings

FIG. 1A is a schematic structural diagram of a wireless terminal provided by Embodiment 1 of the present invention;

FIG. 1B is a schematic structural diagram of a wireless terminal provided by a modified embodiment of Embodiment 1 of the present invention;

FIG. 1C is a schematic structural diagram of a wireless terminal provided by another modified embodiment of Embodiment 1 of the present invention;

FIG. 1D is a schematic structural diagram of a wireless terminal provided by yet another modified embodiment of Embodiment 1 of the present invention;

FIG. 2 is a flow chart of the antenna testing method provided in Embodiment 2 of the present invention;

FIG. 3 is a schematic diagram of an antenna testing system provided in a modified embodiment of Embodiment 3 of the present invention;

FIG. 4 is a schematic diagram of an antenna testing system provided by Embodiment 4 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 only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

As shown in FIG. 1A , Embodiment 1 of the present invention provides a wireless terminal 10 . The wireless terminal 10 includes an antenna 11 and a test circuit 12 . Wherein, the test circuit 12 is arranged inside the wireless terminal 10 , one end of the test circuit 12 is electrically connected to the antenna 11 , and the other end is electrically connected to the test device 30 outside the wireless terminal 10 . Specifically, for example, one end of the test circuit 12 may be directly electrically connected to the antenna 11 by a wire, or may be electrically connected to the antenna 11 by a coupler. The testing device 30 can be, for example, a network analyzer or other devices capable of measuring antenna parameters (such as return loss, voltage standing wave ratio, etc.). It should be noted that the specific connection method between one end of the test circuit 12 and the antenna 11 and the fact that the test device 30 is a network analyzer are just examples, and do not impose any limitation on the present invention.

In the process of antenna test, test circuit 12 is used for receiving the test signal that test equipment 30 sends, and described test signal is transmitted to antenna 11; The reflection signal corresponding to the test signal; the test circuit 12 is also used to receive the reflection signal reflected by the antenna 11, and transmit the reflection signal to the test device 30, so that the test device 30 determines the antenna according to the test signal and the reflection signal 11 parameters.

Wherein, preferably, the passband of the test circuit 12 is outside the working frequency band of the antenna 11, and the test signal is an electrical signal with a frequency within the passband of the test circuit 12, that is, the test signal is an electrical signal with a frequency within the passband of the antenna 11. Electrical signals outside the operating frequency band. By setting the passband of the test circuit 12 outside the working frequency band of the antenna 11, the signal sent by the radio frequency module 15 inside the wireless terminal 10 (referring to FIGS. Moreover, it is also possible to prevent the test circuit 12 from affecting the normal operation of the radio frequency module 15 .

In order to realize that the passband of the test circuit 12 is outside the working frequency band of the antenna 11 , the test circuit 12 can be any one of a high-pass circuit, a low-pass circuit, and a band-stop circuit.

In this embodiment, the test circuit 12 is obtained by performing circuit and wiring processing on the printed circuit board (Printed Circuit Board, PCB) of the wireless terminal 10, so that the antenna 11 can receive the external test equipment 30 through the test circuit 12. the test signal. When the impedance is not matched, the antenna 11 cannot fully absorb the high-frequency energy transmitted on the test circuit 12, and the unabsorbed part of the energy will be reflected back on the test circuit 12 to form a reflected wave, that is, the reflected signal. The testing device 30 determines parameters of the antenna 11 according to the test signal and the reflected signal: return loss (return loss) or voltage standing wave ratio (Voltage Standing Wave Ratio, VSWR). Of course, the test equipment 30 can also determine the return loss and VSWR at the same time. According to the parameters of the antenna 11, it is possible to check whether the performance of the antenna 11 is qualified, and then strictly control the incoming material of the antenna.

It should be noted that, in order to avoid the problem of excessive reflected signals caused by the mismatch between the circuit between the test equipment 30 and the antenna 11 (including the test circuit 12) and the antenna 11, it is necessary to properly debug the circuit between the test equipment 30 and the antenna 11, For example debugging is reserved on the matching circuit (belonging to the part of test circuit 12) of external interface on PCB, and, control the circuit impedance between test equipment 30 and antenna 11 and control the radio frequency line impedance on PCB printed circuit board 10 to be are equal, so that the high-frequency characteristic waveform of the antenna can be displayed on the testing device 30 .

In the wireless terminal provided in this embodiment, the test circuit is used to receive the test signal sent by the test device and send the test signal to the antenna; the antenna is used to receive the test signal and reflect the reflected signal corresponding to the test signal; test The circuit also transmits the reflected signal from the antenna to the test equipment. In this way, the test device can determine the parameters of the antenna according to the test signal and the reflected signal, thereby implementing antenna testing. Compared with the prior art where the wireless terminal needs to be placed in the test environment for testing and requires the antenna to be placed in a very precise position in the test environment, the wireless terminal provided by the present invention can skillfully utilize the internal test circuit of the wireless terminal The antenna test can avoid the problem of high false detection rate caused by strict test conditions and other reasons, and therefore can reduce the false detection rate of the antenna test.

In the wireless terminal 10 provided in Embodiment 1, the antenna 11 is not limited to one, but may include multiple antennas; the test circuit 12 is also not limited to one, and may include multiple. Wherein, the antenna and the test circuit may correspond one by one, or multiple antennas may correspond to one test circuit. Next, in conjunction with FIG. 1B to FIG. 1D , the installation of the antenna and the test circuit will be described, and in the following embodiments, the antenna 11 is two antennas 111 and the antenna 112 as an example where the terminal includes multiple antennas. . Although the description of the following embodiments takes the high-pass circuit 13 as an example for the test circuit 12 , those skilled in the art can use a low-pass circuit or a band-stop circuit instead of the high-pass circuit 13 to obtain other embodiments.

As shown in Figure 1B, in a modified embodiment of the first embodiment, the two antennas 111 and the antenna 112 respectively correspond to two test circuits, wherein the test circuit is a high-pass circuit 13, and the passband of the high-pass circuit 13 corresponds to it corresponding to the operating frequency band of the antenna.

In the antenna testing process, taking the antenna 111 as an example, the high-pass circuit 13 (that is, the high-pass circuit on the left side in FIG. The test signal, and reflect the reflection signal corresponding to the test signal; the high-pass circuit 13 is also used to: receive and transmit the reflection signal of the corresponding antenna 111 to the test device 30, so that the test device 30 The parameters of the antenna 111 are determined from the reflected signal. The testing process of the antenna 112 can be directly obtained according to the testing process of the antenna 111 .

As shown in Figure 1C, in another modified embodiment of Embodiment 1, two antennas 111 and antenna 112 correspond to a test circuit, wherein the test circuit is a high-pass circuit 13a, and the high-pass circuit 13a is a high-pass circuit with adjustable passband circuit.

In the antenna test process, take the antenna 111 as the antenna to be tested as an example, the high-pass circuit 13a is used to receive and transmit the test signal sent by the test equipment 30 to the antenna 111; The reflection signal corresponding to the test signal; the high-pass circuit 13a is also used for: receiving and transmitting the reflection signal of the antenna 111 to the test equipment 30, so that the test equipment 30 determines the parameters of the antenna 111 according to the test signal and the reflection signal. Wherein, the passband adjustment of the high pass circuit 13 a is outside the working frequency band of the antenna 111 . Similarly, when testing the antenna 112 , the passband of the high-pass circuit 13 a can be adjusted to be outside the working frequency band of the antenna 112 .

In the embodiment shown in FIG. 1B and FIG. 1C, the test signal and the reflected signal can both pass through the high-pass circuit 13 or 13a by setting the high-pass circuit 13 or 13a, and the radio frequency module 15 of the wireless terminal 10 itself ( An input signal sent to the antenna 11 by eg a transmitter cannot pass through the high-pass circuit 13 or 13a. Therefore, by setting the high-pass circuit, the radio frequency module 15 does not affect the test of the antenna, and the high-pass circuit does not affect the normal operation of the radio frequency module 15 itself.

As shown in FIG. 1D , on the basis of any of the above-mentioned embodiments, the wireless terminal 10 provided by another modified embodiment of the first embodiment of the present invention further includes an interface 14 for electrically connecting the test circuit 12 and the test device 30 .

Specifically, when performing circuit and wiring processing on the PCB, the interface 14 (such as a Universal Serial Bus (USB) interface) of the wireless terminal 10 can be skillfully used to connect the test circuit 12 with the test equipment 30. connect them. Among them, preferably, the existing interface in the wireless terminal 10 is used as the interface 14 . Therefore, when testing the antenna 11, only need to use the interface 14 to connect the test equipment 30, and then the antenna test can be performed. It can be seen that the assembly process of the antenna test system is very simple, and it is convenient to improve the efficiency of the antenna test.

As shown in FIG. 2 , Embodiment 2 of the present invention provides a method for testing an antenna, which is applied to the wireless terminal provided in Embodiment 1 and its modified embodiments above. The wireless terminal includes an antenna, and the wireless terminal also includes a test circuit. , one end of the test circuit is electrically connected to the antenna, and the other end is electrically connected to a test device outside the wireless terminal, and the method includes:

Step 21, the test circuit receives the test signal sent by the test equipment, and transmits the test signal to the antenna.

When starting the test, the tester can operate the test equipment to send a test signal. Since one end of the test circuit in the wireless terminal is electrically connected to the test equipment, the test circuit can receive the test signal sent by the test equipment. Since the other end of the test circuit is electrically connected to the antenna in the wireless terminal, the test circuit can transmit the received test signal to the antenna in the wireless terminal. In this way, the antenna can receive the test signal sent by the test device via the test circuit.

Step 22, the test circuit receives the reflection signal corresponding to the test signal reflected by the antenna, and transmits the reflection signal to the test equipment, so that the test equipment determines the parameters of the antenna according to the test signal and the reflection signal.

In this step, after the antenna receives the test signal from the test equipment, on the one hand, it radiates energy in the form of electromagnetic waves; on the other hand, it reflects the reflection corresponding to the test signal on the test circuit in the form of reflected waves. Signal. A test circuit electrically connected to the antenna at one end receives the reflected signal from the antenna and transmits the reflected signal to the test device at the other end of the circuit. In this way, the test equipment can receive the reflection signal of the antenna and determine the parameters of the antenna according to the test signal and the reflection signal. The parameters include at least one of return loss and voltage standing wave ratio.

Since the wireless terminal and its antenna do not need to be placed in the test environment, the requirements for the test environment and test accuracy are not strict during the antenna detection process. In this way, it can not only avoid misjudgment caused by human factors such as improper placement of the wireless terminal to be tested in the test environment, improve the pass-through rate, but also improve test efficiency and even production efficiency.

In step 21 and step 22, preferably, the frequency of the test signal can be set within the passband of the test circuit, and the passband of the test circuit is set to work within the antenna and its corresponding radio frequency module (such as a transmitter) Therefore, the test signal can pass through the test circuit, and the signal sent by the radio frequency module to the antenna cannot pass through the test circuit. For example, when the radio frequency module is working, that is, the radio frequency module sends an input signal to the antenna, since the frequency of the input signal is not within the passband of the test circuit, the input signal cannot pass through the The test circuit is sent to the test equipment. In this way, it can not only prevent the radio frequency module from interfering with the antenna test, but also prevent the test circuit from affecting the normal operation of the radio frequency module and the antenna.

Further, in order to realize that the passband of the test circuit is outside the working frequency band of the antenna, the test circuit may be any one of a high-pass circuit, a low-pass circuit, and a band-stop circuit.

According to the antenna testing method provided in the embodiment of the present invention, the test circuit receives the test signal sent by the test device, and transmits the test signal to the antenna; the antenna receives the test signal and emits a reflection corresponding to the test signal After the signal, the test circuit receives and transmits the reflected signal to the test equipment. In this way, the test device can determine the parameters of the antenna according to the test signal and the reflected signal, thereby implementing antenna testing. Compared with the prior art where the wireless terminal needs to be placed in the test environment for testing and the position of the antenna in the test environment is required to be very precise, the antenna test method provided by the present invention can skillfully utilize the internal test of the wireless terminal The circuit performs the antenna test, thereby avoiding the problem of a high false detection rate caused by harsh test conditions and the like, and therefore reducing the false detection rate of the antenna test.

As shown in FIG. 1A , Embodiment 3 of the present invention provides an antenna testing system. The system includes a wireless terminal 10 and a testing device 30 . The wireless terminal 10 includes an antenna 11 and a testing circuit 12 . One end of the testing circuit 12 is electrically connected to the antenna 11 , and the other end is electrically connected to the testing device 30 . The wireless terminal 10 may be the wireless terminal in any of the foregoing implementation manners.

The process of antenna testing by the system is as follows:

The test equipment 30 sends a test signal;

The test circuit 12 receives and transmits the test signal to the antenna 11;

The antenna 11 receives the test signal and reflects a reflected signal corresponding to the test signal;

The test circuit 12 receives and transmits the reflected signal to the test device 30;

The test device 30 receives the reflected signal and determines the parameters of the antenna 11 according to the test signal and the reflected signal.

The test circuit 12 can be any one of a high-pass circuit, a low-pass circuit, and a band-stop circuit. Preferably, the passband of the test circuit 12 is outside the working frequency band of the antenna 11 , and the frequency of the test signal is outside the working frequency band of the antenna 11 .

It can be seen from the above that, compared with the prior art, the wireless terminal needs to be placed in the test environment for testing and the position of the antenna in the test environment is required to be very precise. According to the antenna test system provided by the present invention, through wireless A test circuit is set inside the terminal to connect the antenna and the test equipment outside the wireless terminal for antenna testing, which can avoid the problem of high false detection rate caused by harsh test conditions and other reasons, and therefore can reduce the false detection rate of the antenna test.

As shown in FIG. 3 , in a modified embodiment of Embodiment 3 of the present invention, the antenna testing system further includes a tuning circuit, one end of the tuning circuit 31 is electrically connected to the testing circuit 12, and the other end is electrically connected to the testing device 30; The tuning circuit 31 is used for: optimizing the reflected signal. Using the reflected signal optimized by the tuning circuit 31 , the detection waveform displayed on the display screen of the testing device 30 becomes more ideal when testing, so the testing device 30 can determine antenna parameters with higher precision.

As shown in FIG. 4, Embodiment 4 of the present invention is a specific embodiment of Embodiment 3 of the present invention and its modified embodiments. In the system shown in FIG. The circuit 31 is electrically connected to the testing device 30 through a coaxial cable 41 , and the testing device 30 is electrically connected to a computer 42 through a general purpose interface bus (General Purpose Interface Bus, GPIB) 43 . In this embodiment, the interface 14 is an example of a USB interface 14 , and the test device 30 is an example of a network analyzer 30 .

In the wireless terminal 10, the test circuit 12 is routed to the pins of the USB interface 14 through the PCB, and the pins of the USB interface 14 are used as a bridge for the antenna 11 to be transferred. After the impedance line reaches the USB interface 14, the high-order resonance waveform generated by the antenna 111 (or the antenna 112) is finally displayed on the network analyzer 30 to measure indicators such as return loss or voltage standing wave ratio.

The computer 42 reads the value of the return loss or voltage standing wave ratio of the network analyzer 30 through the general interface bus 43, and judges whether the value is within the set range, so that the consistency of the antenna performance can be judged quickly and stably, reaching The purpose of detecting the antenna. Compared with the prior art where the wireless terminal needs to be placed in the test environment for testing and the position of the antenna in the test environment is required to be very precise, the antenna test system provided by the present invention can avoid problems caused by harsh test conditions and other reasons. Therefore, the false detection rate of the antenna test can be reduced.

As can be seen from the above, due to the adoption of the antenna passive detection scheme (the test signal is sent by the test equipment outside the wireless terminal), compared with the prior art adopting the antenna active detection scheme (the test signal is sent by the radio frequency module inside the wireless terminal), It can reduce the workload of the software, and there is no need to write corresponding AT commands for each product. Moreover, from the point of view of the entire operation, from the cycle of inserting the USB, starting the AT command, to the end of the program running, the detection time is greatly reduced compared with the prior art, so the production efficiency can be improved.

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.

Claims (10)

1. A method for antenna testing, applied to a wireless terminal, the wireless terminal comprising an antenna, characterized in that the wireless terminal further comprises a test circuit, one end of the test circuit is electrically connected to the antenna, and the other end is electrically connected to the antenna The test equipment outside the wireless terminal, the method includes: The test circuit receives a test signal sent by the test device, and transmits the test signal to the antenna; The test circuit receives a reflection signal corresponding to the test signal reflected by the antenna, and transmits the reflection signal to the test device, so that the test device determining parameters of the antenna; Wherein, the passband of the test circuit is outside the working frequency band of the antenna, and the frequency of the test signal is outside the working frequency band of the antenna. 2. The method according to claim 1, wherein the test circuit comprises any one of a high-pass circuit, a low-pass circuit, and a band-stop circuit. 3. The method according to claim 1 or 2, wherein the parameters include at least one of the following parameters: return loss, voltage standing wave ratio. 4. A wireless terminal, the wireless terminal comprising an antenna, characterized in that the wireless terminal further comprises a test circuit, one end of the test circuit is electrically connected to the antenna, and the other end is electrically connected to a test device outside the wireless terminal; The test circuit is used to receive and transmit the test signal sent by the test equipment to the antenna; The antenna is configured to receive the test signal and reflect a reflected signal corresponding to the test signal; The test circuit is further configured to: receive and transmit the reflected signal of the antenna to the test equipment, so that the test equipment determines the parameters of the antenna according to the test signal and the reflected signal; Wherein, the passband of the test circuit is outside the working frequency band of the antenna, and the frequency of the test signal is outside the working frequency band of the antenna. 5. The wireless terminal according to claim 4, wherein the test circuit comprises any one of a high-pass circuit, a low-pass circuit, and a band-stop circuit. 6. The wireless terminal according to claim 5, wherein the test circuit comprises at least one set of test circuits, the antenna is at least one antenna, the test circuits correspond to the antennas one by one, and the The passband of the test circuit is outside the working frequency band of its corresponding antenna; The test circuit is used to receive and transmit the test signal sent by the test equipment to the corresponding antenna; The antenna is configured to receive the test signal and reflect a reflected signal corresponding to the test signal; The test circuit is further configured to: receive and transmit the reflection signal of the corresponding antenna to the test equipment, so that the test equipment determines the parameters of the antenna according to the test signal and the reflection signal. 7. The wireless terminal according to claim 5, wherein the test circuit is a test circuit with adjustable passband, and the antenna is a plurality of antennas; The test circuit is configured to receive and transmit a test signal sent by the test device to the antenna under test, where the antenna under test is the antenna currently being tested among the plurality of antennas; The antenna under test is used to receive the test signal and reflect a reflected signal corresponding to the test signal; The test circuit is further configured to: receive and transmit the reflected signal of the antenna to be tested to the test equipment, so that the test equipment determines the parameters of the antenna according to the test signal and the reflected signal; Wherein, the passband adjustment of the test circuit is outside the working frequency band of the antenna under test. 8. The wireless terminal according to any one of claims 4 to 7, characterized in that the wireless terminal further comprises an interface for electrically connecting the test circuit and the test equipment. 9. A system for antenna testing, comprising a wireless terminal and testing equipment, the wireless terminal comprising an antenna, characterized in that the wireless terminal also comprises a test circuit, one end of the test circuit is electrically connected to the antenna, and the other end electrically connecting the test equipment; The test equipment sends a test signal; the test circuit receives and transmits the test signal to the antenna; The antenna receives the test signal and reflects a reflected signal corresponding to the test signal; the test circuit receives and transmits the reflected signal to the test equipment; The test equipment receives the reflected signal and determines the parameters of the antenna according to the test signal and the reflected signal; Wherein, the passband of the test circuit is outside the working frequency band of the antenna, and the frequency of the test signal is outside the working frequency band of the antenna. 10. The system according to claim 9, further comprising a tuning circuit, one end of the tuning circuit is electrically connected to the test circuit, and the other end is electrically connected to the testing equipment; The tuning circuit is used for: optimizing the reflected signal.