WO2016169001A1

WO2016169001A1 - Miniaturized ota test system having plurality of probes

Info

Publication number: WO2016169001A1
Application number: PCT/CN2015/077165
Authority: WO
Inventors: 陈奕铭; 韩栋; 蒋宇
Original assignee: 陈奕铭
Priority date: 2015-04-21
Filing date: 2015-04-22
Publication date: 2016-10-27

Abstract

Disclosed is a miniaturized OTA test system having a plurality of probes, comprising: a software carrier, a measurement body connected to the software carrier via the probe control device and, and a comprehensive tester respectively connected to the software carrier and the probe control device. The measurement body comprises a shielding housing, a plurality of near-field probes uniformly distributed in the shielding housing, a carrying device at the center of the shielding housing, and a connection device provided on the shielding housing. All the near-field probes are arranged to point to the carrying device in the shielding housing. Since the present invention samples via the plurality of probes enclosing a tested object, measurement is closer to actual environment, thus addressing the problem in which an OTA test is not consistent with actual OTA performance in the process of communication terminal production. The present invention is miniaturized, and the test thereof is quick, accurate and comprehensive, thus being suitable for communication terminal measurement, and particularly for terminal communication production line OTA measurement.

Description

Miniaturized OTA test system with multiple probes

Technical field

The present invention relates to a communication terminal antenna measurement system.

Background technique

The vigorous development of mobile communication has led to a rapid increase in the output value of the communication terminal industry, and the number of communication terminals has increased rapidly. The OTA performance of the communication terminal is very important to the user. The terminal manufacturer requires strict test and check in the production process of the terminal to ensure that each device has good OTA performance when it leaves the factory. Generally, the OTA test is required in the production process of the communication terminal. The common method is to use a simple coupling plate or a single probe for testing. Such a test method is simple to sample, and often cannot fully reflect the real performance of the communication terminal OTA, and there is a possibility of misdetection. So, how to quickly and accurately measure the true OTA performance of the terminal becomes a key point in the production line test.

Summary of the invention

The object of the present invention is to provide a miniaturized, fast, accurate and comprehensive OTA test system, which uses a dual-polarized ultra-wideband multi-probe array to spatially surround and point to the object to be measured, and different directions are sampled by switching different probes during measurement. The radiation data fully describes the spatial radiation performance of the terminal.

The technical solution adopted by the present invention to solve the technical problem is as follows: a miniaturized OTA test system with multiple probes, including a software carrier, a measurement body connected by a probe control device and a software carrier, and a software carrier and a probe respectively a comprehensive tester connected to the control device, the measuring body comprising a shielding shell, a plurality of near-field probes evenly distributed in the shielding shell, a loading device in the center of the shielding shell, a data connection connecting the software carrier and the measured object Membrane, each of the near field probes is pointed in position A load device in the shield housing.

The above probe control device is provided with multiple high-speed RF switches or RF switch arrays, and the corresponding probes and polarizations are selected by controlling these multi-way high-speed switches to open and close different paths, thereby obtaining corresponding sampling data.

The method for controlling the switch or the switch array includes directly outputting the logic level control through the original interface of the software carrier (such as a parallel port or a serial port), and also includes controlling the circuit board by a single chip microcomputer, and the circuit board can pass through the network port and the serial port. Any of the parallel ports is coupled to the software carrier and outputs a logic level that controls the switch or array of switches.

The near field probe described above is an antenna that can transmit and receive radio frequency signals.

The shielding shell is provided with a door that can be opened and closed, and the loading device is a telescopic structure. When the door on the shielding case is opened, the loading device can protrude outside the shielding case to conveniently place the object to be tested.

The data connection device is a device for establishing a software carrier to interact with the measured object data, such as a USB connector, a network port connector, a Bluetooth device or a WLAN device, and has various representations.

The above software carrier is a stand-alone general commercial computer or a dedicated computer, and may also be a card type or other form of computer module having a function of running a computer program, which is independent or integrated in the measuring body.

The above communication comprehensive tester represents a class of instruments, including a variety of comprehensive testers commonly used in the market, such as a variety of communication integrated testers produced by Keysight, Anritsu, Rohde & Schwarz. It also includes a combination of instruments that can be used to replace the communication integrated tester function using multiple instruments, such as a combination of a signal generator and a signal analyzer manufactured by Keysight or Schrodz.

The shielding shell is a sealing body when the door is closed, and can shield the radio frequency signal outside the enclosed environment, and the flexible and diverse structural shape can be selected.

The shielding shell is provided with a absorbing material, and the form of the absorbing material is not limited. The function of the absorbing material is to eliminate the signal reflection as much as possible, and the absorbing cotton, ferrite material and the like having the function of absorbing electromagnetic waves can be used. .

According to the present invention having the above structure, the present invention has the problem that the present invention solves the problem that the OTA test does not conform to the actual OTA performance in the production process of the communication terminal because the sampling is performed by a plurality of probes surrounding the object to be measured, and the measurement is closer to the real environment. . Moreover, the invention is miniaturized, and the test is fast, accurate and comprehensive, and can be used for communication terminal measurement, and is especially suitable for terminal communication production line OTA measurement.

DRAWINGS

The invention will be further described below in conjunction with the drawings and embodiments.

Figure 1 is a block diagram of the system structure of the present invention;

2 is a view showing the overall structure of a measuring body according to an embodiment of the present invention;

3 is a structural view of the measuring body after opening the shielding shell according to an embodiment of the present invention;

Figure 4 is a block diagram showing the structure of the probe control device of the present invention;

Figure 5 is a first embodiment of the data connection device of the present invention;

Figure 6 is a second embodiment of the data connection device of the present invention;

Figure 7 is a third embodiment of the data connection device of the present invention.

detailed description

Embodiment 1

As shown in FIG. 1 , a miniaturized OTA test system with multiple probes includes a software carrier, a probe control device, a measurement body connected to the software carrier via the probe control device, and a comprehensive connection with the software carrier and the probe control device respectively. Tester. The measuring body comprises a shielding shell, a plurality of near-field probes evenly distributed in the shielding shell, a loading device in the center of the shielding shell, a connection software carrier and a measured object Data connection device.

2 and 3 are structural diagrams of the measuring body (integral and internal inside the shielding case). As shown in FIG. 2-3, the measuring body includes a shielding case 1, a plurality of near-field probes uniformly distributed in the shielding case 1, a load device 3 located at the center of the shielding case 1, a connection software carrier, and a The data connection device 4 of the object. The shielding shell 1 is provided with a door 5 that can be opened and closed, and the loading device 3 is a telescopic structure. When the door 5 on the shielding shell 1 is opened, the loading device 3 can protrude outside the shielding shell 1 to be conveniently placed and tested. Things.

The near field probe 2 is an antenna that can transmit and receive radio frequency signals, and each of the near field probes 2 is directed to the carrier device 3 located in the shield case 1 in positional arrangement.

The object to be tested is connected to the software carrier via the data connection device 4 and controlled by the software carrier, and the near field probe 2 is passed through the probe control device 6 and connected via a connection line 7 to the software carrier and controlled by the software carrier.

The integrated tester is connected to the software carrier and controlled to the software carrier, and the integrated tester is connected to the RF interface 8 of the probe control device through the RF interface (the control signal is sent from the software carrier to the control circuit board of the probe control device through the control interface, through The analysis of the control board forms a signal that controls the high speed RF switch in the probe control device, as shown in Figure 4. The probe control unit 6 has a plurality of additional RF interfaces connected to different near field probes 2 to form a connection of the integrated tester to each of the probes. The RF signal is exchanged between the object under test and the near field probe 2 under software carrier configuration.

The probe control device controls the near field probe 2 under the control of the software carrier to open and close the different near field probes 2 in a certain order. The overall work of the system realizes the communication of the measured object through the near-field probe 2 in different directions and the integrated tester, thereby realizing the description of the radiation or receiving performance of the communication terminal in different directions.

As shown in FIG. 5-7, the data connection device 4 is a USB connector (including a USB plug, a socket, and a plug suitable for connecting to the object to be tested), a network port connector (WLAN wireless network card), a Bluetooth device (Bluetooth adapter), or A device such as a WLAN device that establishes a software carrier to interact with the measured object data, and its expression Diverse.

The sampled data is combined with the θ and φ angles for analysis and analysis by the test software (the software part is known in the prior art), and the three-dimensional OTA performance of the terminal is obtained to determine the OTA performance of the terminal. Where θ and φ are determined by the position of the near field probe 2. The invention is sampled by a plurality of near-field probes 2 surrounding the object to be tested, and the measurement is closer to the real environment, and the problem that the OTA test does not conform to the actual OTA performance in the production process of the communication terminal is solved. Moreover, the invention is miniaturized, and the test is fast, accurate and comprehensive, and can be used for communication terminal measurement, and is especially suitable for terminal communication production line OTA measurement.

The above embodiment and the accompanying drawings illustrate the present invention by taking only a square shielding case as an example. The example in which the near-field probe 1 is distributed at eight corners of the shielding case 1 exemplarily describes the present invention. The implementation of the invention is not limited by the above-mentioned manner, as long as various improvements made by the method concept and technical solution of the present invention are adopted, or the concept and technical solution of the present invention are directly applied to other occasions without modification, Within the scope of protection of the present invention.

Claims

A miniaturized OTA test system having a plurality of probes, comprising: a software carrier, a probe control device, a measurement body connected to the software carrier via the probe control device, and a comprehensive tester connected to the software carrier and the probe control device respectively The measuring body comprises a shielding shell, a plurality of near-field probes evenly distributed in the shielding shell, a loading device located in the center of the shielding shell, a data connecting device connecting the software carrier and the measured object, the near fields The probes are all pointed at the positional arrangement to the load device located in the shielded housing.
The miniaturized OTA test system with a plurality of probes according to claim 1, wherein the probe control device is provided with a plurality of high-speed RF switches or RF switch arrays, and the high-speed switch is turned on and off by controlling the high-speed switch. For different RF paths, select the corresponding probe and polarization to get the corresponding sampled data.
The miniaturized OTA test system with a plurality of probes according to claim 1, wherein the shield case is provided with an openable door, and the load device is a telescopic structure.
The miniaturized OTA test system with a plurality of probes according to claim 1, wherein the data connection device is a USB connector, a network port connector, a Bluetooth device or a WLAN device.
A miniaturized OTA test system having a plurality of probes according to claim 1, wherein the software carrier is an independent general commercial computer or a dedicated computer or a card type independent or integrated in the measurement body. A computer module that has the ability to run computer programs.
The miniaturized OTA test system with a plurality of probes according to claim 1, wherein the integrated tester is a common communication integrated tester or a signal generator and signal analysis. The instrument group formed by the combination of the instrument and the integrated communication tester.
A miniaturized OTA test system having a plurality of probes according to claim 1, wherein a absorbing material is mounted in the shield case.