CN210037986U

CN210037986U - Antenna testing device

Info

Publication number: CN210037986U
Application number: CN201920657075.5U
Authority: CN
Inventors: 汤付康
Original assignee: Shenzhen Zeolite Intelligent Technology Co Ltd
Current assignee: Shenzhen Zeolite Intelligent Technology Co Ltd
Priority date: 2019-05-08
Filing date: 2019-05-08
Publication date: 2020-02-07
Anticipated expiration: 2029-05-08

Abstract

The utility model provides an antenna testing arrangement, include: the antenna testing device is characterized by further comprising a shielding box, wherein a USB adapter and a door switch are arranged on the shielding box, one end of the USB is connected with the PC, the other end of the USB is connected with the testing jig, the shielding box control equipment is connected with the door switch, the shielding box control equipment is connected with power supply equipment, and the coupling plate, the testing jig and the power supply equipment are arranged in the shielding box. The signal requirement of the vehicle networking intelligent terminal on the 2G/3G/4G/WIFI/BT/GPS is very strict, so that the performance test of the whole antenna of the vehicle networking intelligent terminal is particularly emphasized in the production test. The utility model discloses before the antenna equipment becomes the intelligent terminal complete machine of car networking, the harmfulness such as the antenna damage of interception antenna equipment improves efficiency, reduce cost.

Description

Antenna testing device

Technical Field

The utility model relates to an antenna testing arrangement, in particular to internet of vehicles intelligent terminal's antenna testing arrangement.

Background

The intelligent terminal of the internet of vehicles is a huge interactive network formed by information such as vehicle positions, speeds, lines and the like. Through devices such as a GPS, an RFID, a sensor, a camera image processing device and the like, the vehicle can complete the financial resources of self environment and state information; through the internet technology, all vehicles can transmit and gather various information of the vehicles to the central processing unit; through computer technology, these large amounts of information can be analyzed and processed to calculate the best routes for different vehicles, report road conditions in time, and the like.

The signal requirement of the vehicle networking intelligent terminal on the 2G/3G/4G/WIFI/BT/GPS is very strict, so that the performance test of the whole antenna of the vehicle networking intelligent terminal is particularly emphasized in the production test. But when carrying out the capability test of car networking intelligent terminal complete machine antenna now, often can find the antenna not detain, perhaps when the antenna harm, need tear down the complete machine and trade the antenna, it is with high costs, efficient.

At present, a wireless antenna coupling test method exists, but the operation precision requirement is high, and the correlation between two antennas needs a large amount of data to be verified, so that a reasonable range can be defined. The impedance difference of the same product is large, so the range is wide, different product impedances can cause different ranges, and data needs to be collected again, so that the test range is defined, and meanwhile, the test method needs a network analyzer and is relatively high in cost.

SUMMERY OF THE UTILITY MODEL

The utility model provides an antenna testing arrangement, because the signal requirement of car networking intelligent terminal to 2G 3G 4G WIFI BT GPS is strict very much, so will pay attention to the capability test of car networking intelligent terminal complete machine antenna very much in the production test. The utility model discloses before the antenna equipment becomes the intelligent terminal complete machine of car networking, the harmfulness such as the antenna damage of interception antenna equipment improves efficiency, reduce cost.

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

an antenna test apparatus comprising: the coupling plate, the power meter is connected to the coupling plate, PC calibration tool is connected to the power meter, antenna testing arrangement still includes the shielded cell, is provided with a USB adapter and door switch on the shielded cell, and the one end of USB adapter is connected with the PC, and the other one end of USB adapter is connected with test fixture, and shielded cell controlgear and door switch are connected, and shielded cell controlgear connects power supply unit, coupling plate, test fixture, power supply unit all arrange the shielded cell in.

The power supply device circuit includes: the positive electrode 1 of the power supply is respectively connected with one end of a first capacitor C1, one end of a third capacitor C3, one end of a resistor is connected with a first input end 5 of a transformer, the negative electrode 2 of the power supply is respectively connected with one end of a second capacitor C2, the other end of the third capacitor C3, the other end of a resistor R and a second input end 6 of the transformer, the other end of the first capacitor C1 and the other end of the second capacitor C2 are both connected with a common grounding point, a first output end 7 of the transformer is connected with one end of a fourth capacitor C4 and a first input end of a door switch, and a second output end 8 of the transformer is respectively connected with the other end of the fourth capacitor C4 and a second input end of the door switch. The object is to provide a high series impedance and a low parallel impedance that severely mismatch the impedance of the noise source and the load impedance, thereby transmitting unwanted frequency components back to the noise source. L, C1 and C2 in the circuit diagram are used for filtering common mode interference, and C3 and C4 are used for filtering series mode interference. R is a discharge resistor, so that the charges accumulated on C3 can be discharged, and the influence on the filter characteristic due to charge accumulation is avoided; the incoming line end L, N of the power supply can be electrified after power failure, and the use safety is ensured.

Drawings

Fig. 1 is a schematic diagram of an embodiment of an antenna testing apparatus according to the present invention;

fig. 2 is a circuit diagram of a power supply device of the antenna testing apparatus of the present invention;

fig. 3 is a schematic diagram of an embodiment of the antenna testing method of the present invention.

Detailed Description

For better understanding of the technical solutions of the present invention, the following detailed description of the embodiments provided in the present invention is provided with reference to the accompanying drawings.

As shown in fig. 1, an antenna test apparatus includes: the device comprises 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, power equipment 21, a door switch 22 and shielding box control equipment 23. The shielding box 11 is a cuboid box body with a door, so that interference of external signals can be prevented, and interference of radiation of the signals on a human body or other equipment can be avoided; the coupling plate 12 receives signals of a reference semi-finished product or a semi-finished product to be detected, and the acceptable frequency range is wide; the PC calibration tool 16 can be used to calibrate the loss of the antenna on the board before the antenna is coupled to the board, and compensate the loss, and can also determine the poor assembly or the damage of the antenna by the measured power when testing the semi-finished product, and the test fixture 19 is a wooden cuboid box structure; the coupling plate 12 is connected with a power meter 14 through a radio frequency line 13, the power meter 14 is connected with a PC (personal computer) calibration tool 16 through a USB (universal serial bus) line 15, a USB adapter 17 and a door switch 22 are arranged on the shielding box 11, one end of the USB adapter 17 is connected with the PC through a USB line 18, and the other end of the USB adapter 17 is connected with a test fixture 19 through a USB data line; the shielding box control device 23 is connected with the door switch 22 and controls the opening and closing of the door switch 22 so as to open and close the shielding box, the shielding box control device 23 is connected with the power supply device 21, and the coupling plate 12, the test fixture 19 and the power supply device 21 are all arranged in the shielding box 11 so as to prevent the interference of external signals and simultaneously avoid the interference of the radiation of the signals to human bodies or other equipment.

More specifically, the circuit of the power supply device 21 includes: the positive electrode 1 of the power supply is respectively connected with one end of a first capacitor C1, one end of a third capacitor C3, one end of a resistor is connected with a first input end 5 of a transformer, the negative electrode 2 of the power supply is respectively connected with one end of a second capacitor C2, the other end of the third capacitor C3, the other end of a resistor R and a second input end 6 of the transformer, the other end of the first capacitor C1 and the other end of the second capacitor C2 are both connected with a common grounding point, a first output end 7 of the transformer is connected with one end of a fourth capacitor C4 and a first input end of a door switch, and a second output end 8 of the transformer is respectively connected with the other end of the fourth capacitor C4 and a second input end of the door switch. The power supply apparatus provides high series impedance and low shunt impedance which severely mismatch the impedance of the noise source and the load impedance and thereby transmit unwanted frequency components back to the noise source, L, C1 and C2 in the circuit being used to filter out common mode interference and C3 and C4 to filter out series mode interference. R is a discharge resistor, so that the charges accumulated on C3 can be discharged, and the influence on the filter characteristic due to charge accumulation is avoided; the incoming line end L, N of the power supply can be electrified after power failure, and the use safety is ensured.

The present embodiment further provides an antenna testing method, which is applied to the antenna testing apparatus, and the method includes the following steps:

step S10, setting the frequency band required by the antenna to be tested on the PC calibration tool, wherein the frequency range is 100 MHz-6 GHz;

step S12, placing a reference semi-finished product in the test fixture;

step S14, the PC calibration tool controls the sending signal of the reference semi-finished product, if the PC makes the signal power of the reference semi-finished product sending EGSM900CH128 be 32 dBm;

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 read signal to the PC calibration tool through the data line, then the first power is compared with the reference power to obtain the loss between the semi-finished product to be measured and the coupling plate, and the power corresponding to the loss is compensated into the PC calibration tool, if the power read by the power meter is 10dBm, and the spatial attenuation is 22dB, the 22dB signal is compensated into the PC calibration tool;

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

step S22, the compensated PC calibration tool controls the emission signal of the semi-finished product to be tested;

step S24, the coupling board receives the emission signal of the semi-finished product to be measured and transmits the emission signal to the power meter through the radio frequency line;

step S26, the power meter reads the second power of the transmission signal of 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, and the compensated PC calibration tool determines whether the semi-finished product to be tested is qualified, specifically: and comparing the difference between the read second power and the reference power, if the obtained difference is less than or equal to the standard value, the semi-finished product to be detected is qualified, if the obtained difference is greater than the standard value, the semi-finished product to be detected is unqualified, if the obtained difference is less than or equal to 1.5dB, the semi-finished product to be detected is qualified, and if the obtained difference is greater than 1.5dB, the semi-finished product to be detected is unqualified.

Before the antenna assembly becomes the complete machine of the intelligent terminal of the internet of vehicles, the defects of the antenna assembly or the defects of antenna damage and the like are intercepted, the efficiency is improved, and the cost is reduced.

It is right above that the embodiment of the present invention provides an antenna testing device, to the general technical personnel in this field, according to the utility model discloses the thought, all have the change part on concrete implementation and application scope, to sum up, this description content should not be understood as right the utility model discloses a restriction.

Claims

1. An antenna test apparatus comprising: the antenna testing device comprises a coupling plate, wherein the coupling plate is connected with a power meter, the power meter is connected with a PC (personal computer) calibration tool, and the antenna testing device is characterized by further comprising a shielding box, a USB adapter and a door switch are arranged on the shielding box, the PC calibration tool is connected with one end of the USB adapter, the other end of the USB adapter is connected with a testing jig, shielding box control equipment is connected with the door switch, shielding box control equipment is connected with power supply equipment, and the coupling plate, the testing jig and the power supply device are all arranged in the shielding box.

2. The antenna test apparatus of claim 1, wherein the power supply device circuit comprises: the positive electrode 1 of the power supply is respectively connected with one end of a first capacitor C1, one end of a third capacitor C3, one end of a resistor is connected with a first input end 5 of a transformer, the negative electrode 2 of the power supply is respectively connected with one end of a second capacitor C2, the other end of the third capacitor C3, the other end of a resistor R and a second input end 6 of the transformer, the other end of the first capacitor C1 and the other end of the second capacitor C2 are both connected with a common grounding point, a first output end 7 of the transformer is connected with one end of a fourth capacitor C4 and a first input end of a door switch, and a second output end 8 of the transformer is respectively connected with the other end of the fourth capacitor C4 and a second input end of the door switch.

3. The antenna test apparatus of claim 1, wherein the power meter and the coupling plate are connected by a radio frequency line.

4. The antenna test apparatus of claim 1, wherein the power meter and the PC calibration tool are connected by a USB cable.