Antenna testing device and method

Abstract

The present invention provides an antenna testing device and method, comprising: a coupling plate, the coupling plate is connected to a power meter, the power meter is connected to a PC calibration tool, the antenna testing device also comprises a shielding box, a USB adapter and a door switch are arranged on the shielding box, one end of the USB is connected to the PC calibration tool, the other end of the USB is connected to the test fixture, the shielding box control device is connected to the door switch, the shielding box control device is connected to the power supply device, and the coupling plate, the test fixture, and the power supply device are all placed in the shielding box. Since the vehicle networking intelligent terminal has particularly strict requirements on 2G / 3G / 4G / WIFI / BT / GPS signals, special attention should be paid to the performance test of the vehicle networking intelligent terminal complete machine antenna during production testing. The present invention is to intercept defects such as poor antenna assembly or antenna damage before the antenna is assembled into the vehicle networking intelligent terminal complete machine, thereby improving efficiency and reducing costs.

Description

Technical Field

[0001] The present invention relates to an antenna testing device and method, and in particular to an antenna testing device and method for a vehicle networking intelligent terminal. Background Art

[0002] The intelligent terminal of the Internet of Vehicles is a huge interactive network composed of information such as vehicle location, speed and route. Through GPS, RFID, sensors, camera image processing and other devices, vehicles can complete the financial management of their own environment and status information; through Internet technology, all vehicles can transmit various information about themselves to the central processor; through computer technology, this large amount of information can be analyzed and processed, so as to calculate the best route for different vehicles and report road conditions in a timely manner.

[0003] Since the IoV smart terminal has very strict requirements on 2G / 3G / 4G / WIFI / BT / GPS signals, special attention should be paid to the performance test of the IoV smart terminal antenna during production testing. However, when performing the performance test of the IoV smart terminal antenna, it is often found that the antenna is not buckled or damaged, and the whole device needs to be dismantled to replace the antenna, which is costly and inefficient.

[0004] There is a wireless antenna coupling test method, but this operation requires high precision. The correlation between the two antennas requires a lot of data to verify in order to define a reasonable range. The impedance of the same product varies greatly, so the range is relatively wide, and different product impedances will also result in different ranges. It is necessary to collect data again to define the test range. At the same time, this test method requires a network analyzer, which is relatively expensive. Summary of the invention

[0005] The present invention provides an antenna testing device and method. Since the vehicle networking intelligent terminal has particularly strict requirements on 2G / 3G / 4G / WIFI / BT / GPS signals, special attention should be paid to the performance test of the vehicle networking intelligent terminal complete machine antenna during production testing. The present invention is to intercept antenna assembly defects or antenna damage before the antenna is assembled into the vehicle networking intelligent terminal complete machine, thereby improving efficiency and reducing costs.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] An antenna testing device comprises: a coupling plate, the coupling plate is connected to a power meter, the power meter is connected to a PC calibration tool, the antenna testing device also comprises a shielding box, a USB adapter and a door switch are arranged on the shielding box, one end of the USB adapter is connected to the PC calibration tool, the other end of the USB adapter is connected to a test fixture, a shielding box control device is connected to the door switch, the shielding box control device is connected to a power supply device, and the coupling plate, the test fixture, and the power supply device are all placed in the shielding box.

[0008] The power supply device circuit includes: the positive electrode 1 of the power supply is respectively connected to one end of the first capacitor C1, one end of the third capacitor C3, one end of the resistor and the first input terminal 5 of the transformer, the negative electrode 2 of the power supply is respectively connected to one end of the second capacitor C2 and the other end of the third capacitor C3; the other end of the resistor R is connected to the second input terminal 6 of the transformer, the other end of the first capacitor C1 and the other end of the second capacitor C2 are both connected to a common ground point, the first output terminal 7 of the transformer is connected to one end of the fourth capacitor C4 and the first input terminal of the door switch, and the second output terminal 8 of the transformer is respectively connected to the other end of the fourth capacitor C4 and the second input terminal of the door switch. The purpose is to provide high series impedance and low parallel impedance, so that it is seriously mismatched with the impedance of the noise source and the load impedance, thereby transmitting the undesirable frequency component back to the noise source. L, C1 and C2 in the circuit diagram are used to filter out common mode interference, and C3 and C4 filter out series mode interference. R is a discharge resistor, which can discharge the charge accumulated on C3 to avoid affecting the filtering characteristics due to charge accumulation; after power failure, it can also make the power supply input terminals L and N uncharged to ensure safety of use.

[0009] The present invention also provides an antenna testing method, which is applied to the above-mentioned antenna testing device, and the method comprises the following steps:

[0010] Step S10, setting the frequency band required by the semi-finished product to be tested on the PC calibration tool;

[0011] Step S12, placing a reference semi-finished product in a test fixture;

[0012] Step S14, the PC calibration tool controls the reference semi-finished product to send a signal;

[0013] Step S16, the coupling board transmits the received signal to the power meter through the data line;

[0014] Step S18, the power meter transmits the information of the first power of the signal read to the PC calibration tool through the data line, and then compares the first power with the reference power to obtain the loss between the reference semi-finished product and the coupling plate, and compensates the power corresponding to the loss power into the PC calibration tool;

[0015] Step S20, taking out the reference semi-finished product from the test fixture and putting in the semi-finished product to be tested;

[0016] Step S22, the compensated PC calibration tool controls the semi-finished product to be tested to transmit a signal;

[0017] Step S24, the coupling board receives the emission signal of the semi-finished product to be tested and transmits it to the power meter through the radio frequency line;

[0018] In step S26, the power meter reads the second power of the signal emitted by the semi-finished product to be tested, and transmits the information of the second power to the compensated PC calibration tool through the data line. The compensated PC calibration tool determines whether the semi-finished product to be tested is qualified, specifically: comparing the difference between the read second power and the reference power. If the difference is less than or equal to the standard value, the semi-finished product to be tested is qualified; if the difference is greater than the standard value, the semi-finished product to be tested is unqualified.

[0019] By implementing the above technical scheme, the following technical effects are achieved: the antenna testing device and method of the present invention can intercept defects such as antenna assembly defects or antenna damage before the antenna is assembled into a complete vehicle networking intelligent terminal, thereby improving efficiency and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of an implementation scheme of the antenna testing device of the present invention;

[0021] Figure 2 A circuit component diagram of a power supply device of an antenna testing device of the present invention;

[0022] Figure 3 It is a schematic diagram of an implementation method of the antenna testing method of the present invention. DETAILED DESCRIPTION

[0023] In order to better understand the technical solution of the present invention, the embodiments provided by the present invention are described in detail below with reference to the accompanying drawings.

[0024] like Figure 1As shown, an antenna testing device includes: a shielding box 11, a coupling plate 12, a power meter 14, a PC calibration tool 16, a USB adapter 17, a test fixture 19, a power supply device 21, a door switch 22, and a shielding box control device 23. The shielding box 11 is a rectangular box with a door on one side, which can prevent interference from external signals and also avoid interference of signal radiation to the human body or other equipment; the coupling plate 12 receives signals from a reference semi-finished product or a semi-finished product to be tested, and can accept a wide frequency range; the PC calibration tool 16 can be used to calibrate the loss between the antenna on the board and the coupling plate, and compensate for it. When testing the semi-finished product, the measured power can also be used to determine whether the antenna is poorly assembled or damaged. The test fixture 19 is a wooden rectangular box structure; the coupling plate 12 is connected to the power meter 14 via a radio frequency line 13, and the power meter 14 is connected to the power meter 14 via a USB line 15. A PC calibration tool 16 is connected, and a USB adapter 17 and a door switch 22 are provided on the shielding box 11. One end of the USB adapter 17 is connected to the PC calibration tool 16 via a USB cable 18, and the other end of the USB adapter 17 is connected to the test fixture 19 via a USB data cable; a shielding box control device 23 is connected to the door switch 22 and controls the opening and closing of the door switch 22 to open and close the shielding box, and the shielding box control device 23 is connected to the power supply device 21. The coupling plate 12, the test fixture 19, and the power supply device 21 are all placed in the shielding box 11 to prevent interference from external signals, and also to avoid interference of signal radiation to the human body or other equipment.

[0025] More specifically, the circuit of the power supply device 21 includes: the positive electrode 1 of the power supply is respectively connected to one end of the first capacitor C1, one end of the third capacitor C3, one end of the resistor and the first input terminal 5 of the transformer, the negative electrode 2 of the power supply is respectively connected to one end of the second capacitor C2, the other end of the third capacitor C3; the other end of the resistor R is connected to the second input terminal 6 of the transformer, the other end of the first capacitor C1 and the other end of the second capacitor C2 are both connected to a common ground point, the first output terminal 7 of the transformer is connected to one end of the fourth capacitor C4 and the first input terminal of the gate switch, and the second output terminal 8 of the transformer is respectively connected to the other end of the fourth capacitor C4 and the second input terminal of the gate switch. The power supply device provides high series impedance and low parallel impedance, which makes it seriously mismatched with the impedance of the noise source and the load impedance, thereby transmitting undesirable frequency components back to the noise source. L, C1 and C2 in the circuit are used to filter out common mode interference, and C3 and C4 filter out series mode interference. R is a discharge resistor, which can discharge the charge accumulated on C3 to avoid affecting the filtering characteristics due to charge accumulation; after power failure, it can also make the power supply input terminals L and N uncharged to ensure safety of use.

[0026] The embodiment of the present invention further provides an antenna testing method, which is applied to the above antenna testing device, and the method comprises the following steps:

[0027] Step S10, setting the frequency band required by the antenna to be tested on the PC calibration tool, the frequency range: 100 MHz to 6 GHz;

[0028] Step S12, placing a reference semi-finished product in a test fixture;

[0029] Step S14, the PC calibration tool controls the reference semi-finished product to send a signal, for example, the PC allows the reference semi-finished product to transmit an EGSM900CH128 signal with a power of 32dBm;

[0030] Step S16, the coupling board transmits the received signal to the power meter through the data line;

[0031] Step S18, the power meter transmits the information of the first power of the signal read to the PC calibration tool through the data line, and then compares the first power with the reference power to obtain the loss between the reference semi-finished product and the coupling plate, and compensates the power corresponding to the loss to the PC calibration tool. For example, if the power read by the power meter is 10dBm, and the spatial attenuation is 22dB, the 22dB signal will be compensated to the PC calibration tool;

[0032] Step S20, taking out the reference semi-finished product from the test fixture and putting in the semi-finished product to be tested;

[0033] Step S22, the compensated PC calibration tool controls the semi-finished product to be tested to transmit a signal;

[0034] Step S24, the coupling board receives the emission signal of the semi-finished product to be tested and transmits it to the power meter through the radio frequency line;

[0035] In step S26, the power meter reads the second power of the signal emitted by the semi-finished product to be tested, and transmits the information of the second power to the compensated PC calibration tool through the data line. The compensated PC calibration tool determines whether the semi-finished product to be tested is qualified, specifically: comparing the difference between the read second power and the reference power, if the difference is less than or equal to the standard value, the semi-finished product to be tested is qualified; if the difference is greater than the standard value, the semi-finished product to be tested is unqualified; if the difference is less than or equal to 1.5dB, the semi-finished product to be tested is qualified; if the difference is greater than 1.5dB, the semi-finished product to be tested is unqualified.

[0036] Before the antenna is assembled into the complete vehicle networking intelligent terminal, defects such as antenna assembly defects or antenna damage can be intercepted to improve efficiency and reduce costs.

[0037] The above is a detailed introduction to an antenna testing device and method provided in an embodiment of the present invention. For a person skilled in the art, according to the concept of the embodiment of the present invention, there may be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An antenna testing method, applied to an antenna testing device, characterized in that: The antenna test device comprises: a coupling plate, the coupling plate is connected to a power meter, the power meter is connected to a PC calibration tool, the antenna test device also comprises a shielding box, a USB adapter and a door switch are arranged on the shielding box, one end of the USB adapter is connected to the PC calibration tool, the other end of the USB adapter is connected to the test fixture, a shielding box control device is connected to the door switch, the shielding box control device is connected to a power supply device, and the coupling plate, the test fixture, and the power supply device are all placed in the shielding box; The method comprises the following steps: Step S10, setting the frequency band required by the antenna to be tested on the PC calibration tool; Step S12, placing a reference semi-finished product in a test fixture; Step S14, the PC calibration tool controls the reference semi-finished product to send a signal; Step S16, the coupling board transmits the received signal to the power meter through the data line; Step S18, the power meter transmits the information of the first power of the signal read to the PC calibration tool through the data line, and then compares the first power with the reference power to obtain the loss between the reference semi-finished product and the coupling plate, and compensates the power corresponding to the loss into the PC calibration tool; Step S20, taking out the reference semi-finished product from the test fixture and putting in the semi-finished product to be tested; Step S22, the compensated PC calibration tool controls the semi-finished product to be tested to transmit a signal; Step S24, the coupling board receives the emission signal of the semi-finished product to be tested and transmits it to the power meter through the radio frequency line; In step S26, the power meter reads the second power of the signal emitted by the semi-finished product to be tested, and transmits the information of the second power to the compensated PC calibration tool through the data line. The compensated PC calibration tool determines whether the semi-finished product to be tested is qualified, specifically by comparing the difference between the read second power and the reference power. If the difference is less than or equal to the standard value, the semi-finished product to be tested is qualified; if the difference is greater than the standard value, the semi-finished product to be tested is unqualified.

2. The antenna testing method according to claim 1, characterized in that: The power supply device circuit includes: the positive electrode of the power supply is respectively connected to one end of the first capacitor and one end of the third capacitor, one end of the resistor is connected to the first input end of the transformer, and the negative electrode of the power supply is respectively connected to one end of the second capacitor and the other end of the third capacitor; the other end of the resistor is connected to the second input end of the transformer, the other end of the first capacitor and the other end of the second capacitor are both connected to a common grounding point, the first output end of the transformer is connected to one end of the fourth capacitor and the first input end of the gate switch, and the second output end of the transformer is respectively connected to the other end of the fourth capacitor and the second input end of the gate switch.

3. The antenna testing method according to claim 1, characterized in that: The power meter and the coupling plate are connected via a radio frequency line.

4. The antenna testing method according to claim 1, characterized in that: The power meter and PC calibration tool are connected via a USB cable.

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