CN113325243A - Line loss measuring equipment and method for radio frequency test system - Google Patents
Line loss measuring equipment and method for radio frequency test system Download PDFInfo
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- CN113325243A CN113325243A CN202010130952.0A CN202010130952A CN113325243A CN 113325243 A CN113325243 A CN 113325243A CN 202010130952 A CN202010130952 A CN 202010130952A CN 113325243 A CN113325243 A CN 113325243A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G—PHYSICS
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
The invention provides a radio frequency test system line loss measuring device and method, wherein two ends of a line system of the whole radio frequency test system are respectively connected to a first standard line connected with two ports of a network branch, and a line loss value LossArray _ Cable of the line system is measured and recorded; connecting one end of a second standard line to the network branch, connecting the other end of the second standard line to a measurement probe of a power meter of the Agilent, controlling the network branch to emit a first signal, and reading a first signal value from the power meter of the Agilent, wherein the first signal value is recorded as Lossarray _ PowerMeter; connecting a measuring probe of an Agilent power meter to a measuring port of a comprehensive measuring instrument, controlling a second signal transmitted by the comprehensive measuring instrument, reading a second signal value from the power meter end as LossArray _ Base, and subtracting LossArray _ PowerMeter from the LossArray _ Base to obtain LossArray _ InterLoss; the line loss value of the whole radio frequency test system is calculated according to the following formula LossArray _ Cable + LossArray _ Interloss, and the line loss value of the radio frequency test system is simply, efficiently and reliably measured.
Description
Technical Field
The invention relates to the field of computers, in particular to a line loss measuring device and method for a radio frequency test system.
Background
The radio frequency test system of a factory is generally formed by connecting a comprehensive tester, a radio frequency connecting wire, a shielding box and a test fixture in series, wherein the line loss of the radio frequency test system refers to the sum of the line losses of the components (the line loss of a line system and the internal loss of the comprehensive tester). The line loss of the radio frequency connecting line, the line loss of the radio frequency adapter on the shielding box and the line loss of the radio frequency head on the test fixture form a line loss value S21 of the line system, and the line loss value S21 can be measured by connecting the line loss values in series and using a network branch; and a part of line loss comes from the internal loss of the comprehensive tester.
The internal loss of the comprehensive tester is the most complex and can be measured only by using a network branch, a power meter and the cross measurement of the comprehensive tester, wherein only the network branch in the three testers can automatically correct the internal loss to be 0, so the network branch is the only tester which can be used as a reference standard; then, the combination of the integrated measuring instrument and the power meter is used, the integrated measuring instrument sends a signal with a certain fixed size to the power meter for measurement, the internal loss of the combination is obtained through the difference operation of the calibration value and the measured value, and the internal loss of the power meter which is just calculated is subtracted, so that the internal loss of the integrated measuring instrument is the internal loss of the integrated measuring instrument. Finally, the line loss of the whole radio frequency test system is clear.
The existing schemes for measuring line loss mainly include two types:
the first, golden plate calibration, is typically from engineers in the radio frequency department. The radio frequency engineer assumes that the environment for debugging the product is an ideal environment, and manufactures gold sample (gold plate) in the environment, so that the production line uses the gold sample to reversely calibrate the size of the line loss, thereby becoming gold plate calibration;
secondly, only the line loss value S21 of the line system is measured by neglecting the internal loss of the comprehensive tester, namely, only the line loss measurement of the line system is carried out.
In the first conventional solution, the gold plate calibration method is suitable for batch fast calibration of line loss, but the accuracy of the gold plate itself cannot reach an absolutely ideal state, mainly because the line loss values of the gold plate manufacturing environment are all empirical values, not absolute measurement values. Especially, the internal loss of the comprehensive tester in the golden board manufacturing environment is absolutely different from the internal loss of the comprehensive tester in the production line, and when the internal loss of the instrument in the production line is greater than the internal loss of the instrument in the golden board manufacturing environment, the line loss calibrated by the golden board is possibly a negative value. However, the line loss should be objective, i.e. must be positive, so the gold plate calibration limitation is relatively large.
In addition, in the second conventional scheme, it is preferable to ignore the line loss measurement method of the internal loss of the integrated tester, because the proportion of the internal loss of the tester is relatively large under the condition that the line loss of the whole system is not large, and the internal loss of the tester is ignored at this time, which will have a relatively large influence on the product to be tested.
Disclosure of Invention
The invention aims to provide a line loss measuring device and method for a radio frequency test system.
According to an aspect of the present invention, there is provided a line loss measuring device for a radio frequency test system, the method including:
the two ports of the network branch are respectively connected with the two ends of the circuit system of the whole radio frequency test system through first standard lines;
the measuring probe of the Agilent power meter is connected with the network branch through a second standard line;
and the measuring port of the comprehensive measuring instrument is connected with the measuring probe of the Agilent power meter.
Further, in the above device, the net is E5071C of agilent.
Further, in the above device, the model of the agilent power meter is E4416A.
Further, in the above device, the model of the integrated tester is MT8870 or CMW 500.
According to another aspect of the present invention, there is also provided a line loss measurement method for a radio frequency test system, wherein the method includes:
adopting a net minute and a first standard line, and carrying out self calibration of the net minute so as to clear the internal loss of the net minute;
respectively connecting two ends of a line system of the whole radio frequency test system to first standard lines connected with two ports of the network branch, and measuring and recording a line loss value LossArray _ Cable of the line system;
connecting one end of a second standard line with the network branch, connecting the other end of the second standard line with a measurement probe of the Agilent power meter, controlling the network branch to emit a first signal, reading a first signal value from the Agilent power meter, taking the first signal value as an internal loss value of the Agilent power meter, and recording the first signal value as LossArray _ PowerMeter;
connecting a measuring probe of an Agilent power meter to a measuring port of a comprehensive measuring instrument, controlling a second signal transmitted by the comprehensive measuring instrument, reading a second signal value from the power meter end as LossArray _ Base, subtracting LossArray _ PowerMeter from the LossArray _ Base to obtain an internal loss value of the comprehensive measuring instrument, and marking as LossArray _ InterLoss;
calculating the line loss value of the whole radio frequency test system according to the following formula:
the line loss value of the whole radio frequency test system is lossaray _ Cable + lossaray _ lnloss.
Further, in the above method, the network divider and the first standard line are used, and self-calibration of the network divider is performed to clear the internal loss of the network divider, including:
the method comprises the steps of adopting an Agilent network branch and a first standard line, wherein the model of the Agilent network branch is E5071C, and performing network branch self-calibration to zero the internal loss of the network branch.
Further, in the above method, respectively connecting two ends of a line system of the whole radio frequency test system to the first standard lines connected to the two ports of the network branch, and measuring and recording a line loss value LossArray _ Cable of the line system, includes:
connecting two ends of a line system of the whole radio frequency test system to first standard lines of two ports of a network branch E5071C respectively;
and recording a corresponding line loss value of the line system for one frequency point every 100MHz between 700MHz and 2600MHz, recording an array comprising the line loss values of 20 frequency points, and recording the array as LossArray _ Cable.
Further, in the above method, connecting one end of a second standard line to the grid section, connecting the other end of the second standard line to a measurement probe of an agilent power meter, controlling the grid section to emit a first signal, reading a first signal value from the agilent power meter as an internal loss value of the agilent power meter, and recording the first signal value as a LossArray _ PowerMeter, including:
and adopting an Agilent power meter E4416A, connecting one end of a second standard line to the network branch, connecting the other end of the second standard line to a measurement probe of the Agilent power meter E4416A, controlling the network branch to emit CW waves of-60 dBm, recording a frequency point every 100MHz between 700MHz and 2600MHz, recording an array comprising 20 frequency point signal values as an internal loss value of the Agilent power meter, and recording the internal loss value as Lossarray _ PowerMeter.
Further, in the above method, connecting a measurement probe of an agilent power meter to a measurement port of a comprehensive tester, controlling a second signal transmitted by the comprehensive tester, reading a value of the second signal from the power meter as lossaray _ Base, and subtracting lossaray _ PowerMeter from lossaray _ Base to obtain an internal loss value of the comprehensive tester, which is denoted as lossaray _ lnterloss, including:
the method comprises the steps of adopting a comprehensive tester with the model of MT8870 or CMW500, connecting a measuring probe of an Agilent power meter to a measuring port of the comprehensive tester, controlling the comprehensive tester to transmit a signal of-60 dBm, recording a frequency point every 100MHz between 700MHz and 2600MHz, recording an array comprising 20 frequency point signal values, marking as LossArray _ Base, and subtracting LossArray _ PowerMeter from LossArray _ Base to obtain an internal loss value of the comprehensive tester, and marking as LossArray _ InterLoss.
Compared with the prior art, the two ends of the line system of the whole radio frequency test system are respectively connected to the first standard line connected with the two ports of the network branch, and the line loss value LossArray _ Cable of the line system is measured and recorded; connecting one end of a second standard line with the network branch, connecting the other end of the second standard line with a measurement probe of the Agilent power meter, controlling the network branch to emit a first signal, reading a first signal value from the Agilent power meter, taking the first signal value as an internal loss value of the Agilent power meter, and recording the first signal value as LossArray _ PowerMeter; connecting a measuring probe of an Agilent power meter to a measuring port of a comprehensive measuring instrument, controlling a second signal transmitted by the comprehensive measuring instrument, reading a second signal value from the power meter end as LossArray _ Base, subtracting LossArray _ PowerMeter from the LossArray _ Base to obtain an internal loss value of the comprehensive measuring instrument, and marking as LossArray _ InterLoss; calculating the line loss value of the whole radio frequency test system according to the following formula: the line loss value of the whole radio frequency test system is lossaray _ Cable + lossaray _ lnloss, and the line loss value of the radio frequency test system is simply, efficiently and reliably measured.
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Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
fig. 1 is a flowchart illustrating a line loss measurement method of a radio frequency test system according to an embodiment of the invention.
The same or similar reference numbers in the drawings identify the same or similar elements.
Detailed Description
The present invention is described in further detail below with reference to the attached drawing figures.
In a typical configuration of the present application, the terminal, the device serving the network, and the trusted party each include one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). Memory is an example of a computer-readable medium.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include non-transitory computer readable media (transient media), such as modulated data signals and carrier waves.
The invention provides a line loss measuring device of a radio frequency test system, which comprises:
the two ports of the network branch are respectively connected with the two ends of the circuit system of the whole radio frequency test system through first standard lines;
the measuring probe of the Agilent power meter is connected with the network branch through a second standard line;
and the measuring port of the comprehensive measuring instrument is connected with the measuring probe of the Agilent power meter.
The invention realizes simple, efficient and reliable measurement of the line loss value of the radio frequency test system through the equipment.
In an embodiment of the line loss measuring device of the radio frequency testing system, the network branch is E5071C of agilent.
In an embodiment of the line loss measuring device of the radio frequency testing system, the model of the agilent power meter is E4416A.
In an embodiment of the line loss measuring device of the radio frequency testing system of the present invention, the model of the integrated tester is MT8870 or CMW 500.
According to another aspect of the present invention, there is also provided a line loss measurement method for a radio frequency test system, the method including:
step S1, adopting a net minute and a first standard line, and carrying out self calibration of the net minute so as to clear the internal loss of the net minute;
preferably, an agilent net score and a first standard line can be adopted, the model of the agilent net score is E5071C, net score self-calibration is carried out, and internal loss of the net score is cleared;
step S2, respectively connecting the two ends of the line system of the whole radio frequency test system to the first standard line connected with the two ports of the network branch, measuring and recording the line loss value of the line system, and marking as LossArray _ Cable;
preferably, two ends of a line system of the whole radio frequency test system are respectively connected to first standard lines of two ports of the network branch E5071C, and a line loss value lossaray _ Cable of the line system is measured, wherein a corresponding line loss value of the line system is recorded for every 100MHz between 700MHz and 2600MHz at a frequency point, an array of line loss values including 20 frequency points is recorded and is recorded as lossaray _ Cable, which is the line loss value of the line system;
step S3, connecting one end of a second standard line with the grid branch, connecting the other end of the second standard line with a measurement probe of the Agilent power meter, controlling the grid branch to emit a first signal, reading a first signal value from the Agilent power meter as an internal loss value of the Agilent power meter, and recording the first signal value as Lossarray _ PowerMeter;
preferably, an agilent power meter E4416A is adopted, one end of the second standard line is connected to the network branch, the other end of the second standard line is connected to a measurement probe of the agilent power meter E4416A, the network branch is controlled to emit a CW wave of-60 dBm, a first signal value is read from the power meter end, a frequency point is recorded every 100MHz between 700MHz and 2600MHz, and an array comprising 20 frequency point signal values is recorded and is recorded as lossaray _ PowerMeter, which is an internal loss value of the agilent power meter;
step S4, connecting a measuring probe of an Agilent power meter to a measuring port of a comprehensive tester, controlling a second signal emitted by the comprehensive tester, reading a value of the second signal from the power meter end as LossArray _ Base, subtracting LossArray _ PowerMeter from the LossArray _ Base to obtain an internal loss value of the comprehensive tester, and marking as LossArray _ InterLoss;
preferably, a comprehensive tester (a common mainstream test instrument for production lines such as MT8870/CMW 500) can be adopted, a measuring probe of an agilent power meter E4416A is connected to a measuring port of the comprehensive tester, the comprehensive tester is controlled to transmit a signal of-60 dBm, and the signal size is read from a power meter end, wherein a frequency point is recorded every 100MHz from 700MHz to 2600MHz, an array comprising 20 frequency point signal values is recorded and recorded as lossaray _ Base, and the lossaray _ PowerMeter is subtracted from the lossaray _ Base to obtain an internal loss value of the comprehensive tester and recorded as lossaray _ loss;
step S5, calculating the line loss value of the whole rf testing system according to the following formula:
the line loss value of the whole radio frequency test system is lossaray _ Cable + lossaray _ lnloss.
Optionally, the recorded signals and the line loss values are in an array form, and an array integral addition and subtraction operation needs to be performed, and the finally obtained line loss values need to be filled into corresponding line loss storage files on a PC to be effective, so that the data records and operations can be conveniently and quickly processed by using C language, and final results can be filled into target files through programming.
In conclusion, the line loss value of the radio frequency test system is simply, efficiently and reliably measured by the equipment and the method.
For details of embodiments of each device and storage medium of the present invention, reference may be made to corresponding parts of each method embodiment, and details are not described herein again.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
It should be noted that the present invention may be implemented in software and/or in a combination of software and hardware, for example, as an Application Specific Integrated Circuit (ASIC), a general purpose computer or any other similar hardware device. In one embodiment, the software program of the present invention may be executed by a processor to implement the steps or functions described above. Also, the software programs (including associated data structures) of the present invention can be stored in a computer readable recording medium, such as RAM memory, magnetic or optical drive or diskette and the like. Further, some of the steps or functions of the present invention may be implemented in hardware, for example, as circuitry that cooperates with the processor to perform various steps or functions.
In addition, some of the present invention can be applied as a computer program product, such as computer program instructions, which when executed by a computer, can invoke or provide the method and/or technical solution according to the present invention through the operation of the computer. Program instructions which invoke the methods of the present invention may be stored on a fixed or removable recording medium and/or transmitted via a data stream on a broadcast or other signal-bearing medium and/or stored within a working memory of a computer device operating in accordance with the program instructions. An embodiment according to the invention herein comprises an apparatus comprising a memory for storing computer program instructions and a processor for executing the program instructions, wherein the computer program instructions, when executed by the processor, trigger the apparatus to perform a method and/or solution according to embodiments of the invention as described above.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned. Furthermore, it is obvious that the word "comprising" does not exclude other elements or steps, and the singular does not exclude the plural. A plurality of units or means recited in the apparatus claims may also be implemented by one unit or means in software or hardware. The terms first, second, etc. are used to denote names, but not any particular order.
Claims (9)
1. A radio frequency test system line loss measurement device, wherein the device comprises:
the two ports of the network branch are respectively connected with the two ends of the circuit system of the whole radio frequency test system through first standard lines;
the measuring probe of the Agilent power meter is connected with the network branch through a second standard line;
and the measuring port of the comprehensive measuring instrument is connected with the measuring probe of the Agilent power meter.
2. The apparatus of claim 1, wherein the net is model number E5071C agilent.
3. The apparatus of claim 1, wherein the Agilent's power meter is model E4416A.
4. The apparatus of claim 1, wherein the integrated meter is of a model MT8870 or CMW 500.
5. A line loss measurement method of a radio frequency test system, wherein the method comprises the following steps:
adopting a net minute and a first standard line, and carrying out self calibration of the net minute so as to clear the internal loss of the net minute;
respectively connecting two ends of a line system of the whole radio frequency test system to first standard lines connected with two ports of the network branch, measuring and recording a line loss value of the line system, and marking as LossArray _ Cable;
connecting one end of a second standard line with the network branch, connecting the other end of the second standard line with a measurement probe of the Agilent power meter, controlling the network branch to emit a first signal, reading a first signal value from the Agilent power meter, taking the first signal value as an internal loss value of the Agilent power meter, and recording the first signal value as LossArray _ PowerMeter;
connecting a measuring probe of an Agilent power meter to a measuring port of a comprehensive measuring instrument, controlling a second signal transmitted by the comprehensive measuring instrument, reading a second signal value from the power meter end as LossArray _ Base, subtracting LossArray _ PowerMeter from the LossArray _ Base to obtain an internal loss value of the comprehensive measuring instrument, and marking as LossArray _ InterLoss;
calculating the line loss value of the whole radio frequency test system according to the following formula:
the line loss value of the whole radio frequency test system is lossaray _ Cable + lossaray _ lnloss.
6. The apparatus of claim 1, wherein employing a net point and a first standard line and performing self-calibration of the net point to zero internal losses of the net point comprises:
the method comprises the steps of adopting an Agilent network branch and a first standard line, wherein the model of the Agilent network branch is E5071C, and performing network branch self-calibration to zero the internal loss of the network branch.
7. The apparatus according to claim 1, wherein the step of connecting two ends of a line system of the whole radio frequency test system to the first standard line connected to the two ports of the network branch, respectively, and measuring and recording a line loss value LossArray _ Cable of the line system comprises:
connecting two ends of a line system of the whole radio frequency test system to first standard lines of two ports of a network branch E5071C respectively;
and recording a corresponding line loss value of the line system for one frequency point every 100MHz between 700MHz and 2600MHz, recording an array comprising the line loss values of 20 frequency points, and recording the array as LossArray _ Cable.
8. The apparatus of claim 1, wherein connecting one end of a second standard line to the net section and the other end of the second standard line to a measurement probe of an agilent power meter, controlling the net section to emit a first signal, reading a first signal value from the agilent power meter as an internal loss value of the agilent power meter, recorded as LossArray _ PowerMeter, comprises:
and adopting an Agilent power meter E4416A, connecting one end of a second standard line to the network branch, connecting the other end of the second standard line to a measurement probe of the Agilent power meter E4416A, controlling the network branch to emit CW waves of-60 dBm, recording a frequency point every 100MHz between 700MHz and 2600MHz, recording an array comprising 20 frequency point signal values as an internal loss value of the Agilent power meter, and recording the internal loss value as Lossarray _ PowerMeter.
9. The apparatus of claim 1, wherein the measuring probe of the agilent power meter is connected to the measuring port of the integrated meter, the integrated meter is controlled to transmit the second signal, the value of the second signal is read from the power meter terminal as lossaray _ Base, and the lossaray _ PowerMeter is subtracted from the lossaray _ Base to obtain the internal loss value of the integrated meter, which is called lossaray _ lnloss, comprising:
the method comprises the steps of adopting a comprehensive tester with the model of MT8870 or CMW500, connecting a measuring probe of an Agilent power meter to a measuring port of the comprehensive tester, controlling the comprehensive tester to transmit a signal of-60 dBm, recording a frequency point every 100MHz between 700MHz and 2600MHz, recording an array comprising 20 frequency point signal values, marking as LossArray _ Base, and subtracting LossArray _ PowerMeter from LossArray _ Base to obtain an internal loss value of the comprehensive tester, and marking as LossArray _ InterLoss.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115372740A (en) * | 2022-08-19 | 2022-11-22 | 上海物骐微电子有限公司 | RF chip line loss test method, system, readable storage medium and electronic device |
| CN116660807A (en) * | 2023-07-28 | 2023-08-29 | 荣耀终端有限公司 | Line loss detection method and related equipment |
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2020
- 2020-02-28 CN CN202010130952.0A patent/CN113325243A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115372740A (en) * | 2022-08-19 | 2022-11-22 | 上海物骐微电子有限公司 | RF chip line loss test method, system, readable storage medium and electronic device |
| CN116660807A (en) * | 2023-07-28 | 2023-08-29 | 荣耀终端有限公司 | Line loss detection method and related equipment |
| CN116660807B (en) * | 2023-07-28 | 2023-10-20 | 荣耀终端有限公司 | Line loss detection method and related equipment |
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