CN109309749A - A kind of line loss calibration method and system - Google Patents
A kind of line loss calibration method and system Download PDFInfo
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- CN109309749A CN109309749A CN201811249044.2A CN201811249044A CN109309749A CN 109309749 A CN109309749 A CN 109309749A CN 201811249044 A CN201811249044 A CN 201811249044A CN 109309749 A CN109309749 A CN 109309749A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/24—Arrangements for testing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/29—Performance testing
Abstract
The invention discloses a kind of line loss calibration methods, this method comprises: the line loss value of interface board is measured by test equipment, the wireless aerial connector sub-miniature A connector that interface board includes at least test bench and connect with test bench；The port error of test equipment is measured by the radio frequency line of the known line loss value of test equipment sum；The line loss value of line loss value, radio frequency line based on interface board and the port error of test equipment, determine the line loss value between test bench and test equipment port.The program can accurately calibrate the path loss during radio frequency testing, so that the radio frequency parameter to mobile terminal is tested.
Description
Technical field
The present invention relates to field of communication technology more particularly to a kind of line loss calibration method and systems, radio frequency parameter test side
Method and system.
Background technique
In mobile phone production process, need to mobile phone radio frequency parameter, such as transmission power, frequency error, phase error, reception
Sensitivity etc. is tested.It needs to connect hand by radio frequency line when detecting mobile phone radiofrequency signal by comprehensive tester
Machine, wherein the Insertion Loss of fixture and the uncertainty of test equipment are known as the system loss in path, and abbreviation line loss can pass through school
Standard is eliminated.In order to improve the accuracy of mobile phone radio frequency parameter testing, need to test bench to the line loss between test equipment into
Row calibration.
The method for carrying out line loss calibration in the prior art calibrates radio frequency line, test one is line loss is calibrated using golden machine
The loss of fixture, test equipment etc..Golden machine is that indices and parameter are transferred to fixed optimum value, and in test, gold machine passes through
Radio frequency line connects comprehensive tester, is calibrated simultaneously with the index of golden machine to radio frequency line and comprehensive tester.This method has
Certain defect, with the variation of the elongated and temperature of standing time, the power of golden machine might have variation, easy to damage.Second
Kind is periodically to calibrate line loss with vector network analyzer, and this method precision is high but can only test both ends all is SMA interface
The line loss of radio frequency line, and the general interface of fixture is thimble, line loss is unable to test.And this mode can not be to the deviation of test equipment
Carry out consistency calibration.
Therefore, it is necessary to a kind of line loss calibration method, can path loss during accurate alignment radio frequency testing, so as to right
The radio frequency parameter of mobile terminal is tested.
Summary of the invention
For this purpose, the present invention provides a kind of line loss calibration method and systems, radio frequency parameter test method and system, to try hard to
Solve the problems, such as or at least alleviate above it is existing at least one.
According to an aspect of the invention, there is provided a kind of line loss calibration method passes through tester in the method first
Device measures the line loss value of interface board, and wherein interface board includes test bench and the sub-miniature A connector that connect with test bench.Then pass through test
The port error of instrument and the radio frequency line of known line loss value measurement test equipment.Finally the line loss value based on interface board, radio frequency line
Line loss value and test equipment port error, determine the line loss value between test bench and test equipment port.
Optionally, in the above-mentioned methods, the both ends of radio frequency line have sub-miniature A connector.
Optionally, in the above-mentioned methods, test bench may include main collection test bench and diversity test bench, and sub-miniature A connector can be with
Including main collection sub-miniature A connector and diversity sub-miniature A connector, main collection sub-miniature A connector and diversity sub-miniature A connector pass through attenuation network and the survey of main collection respectively
Examination seat is connected with diversity test bench.
Optionally, in the above-mentioned methods, one end of test equipment can be made to connect main collection test bench, the other end by fastening wire
Main collection sub-miniature A connector is connected by radio frequency line, to measure the main collection line loss value of two-port network.It is then based on two-port network
Main collection line loss value, the line loss value of the line loss value of fastening wire and radio frequency line, calculate the main collection line loss value of interface board.Likewise it is possible to make
One end of test equipment connects diversity test bench by fastening wire, and the other end connects diversity sub-miniature A connector by radio frequency line, measures two ends
The diversity line loss value of mouth network.It is then based on diversity line loss value, the line loss value of buckle line and the line of radio frequency line of two-port network
Damage value calculates the diversity line loss value of interface board.
Optionally, in the above-mentioned methods, test equipment may include main collection emission port, diversity transmission port and receiving end
Mouthful.Main collection emission port and receiving port can be connected by radio frequency line, main collection emission port is made to emit the first predetermined power, surveyed
Measure receiving port first receives power.And diversity transmission port and receiving port are connected by radio frequency line, make diversity transmission end
Mouth the first predetermined power of transmitting, measure receiving port second receive power.It is then based on the first predetermined power, the first reception function
The line loss value of rate and radio frequency line calculates the main collection port error of test equipment.Based on the first predetermined power, second receive power and
The line loss value of radio frequency line calculates the diversity port error of test equipment.
Optionally, in the above-mentioned methods, main collection sub-miniature A connector and receiving port can be connected by radio frequency line, send out main collection
It penetrates port and emits the second predetermined power, the third for measuring receiving port receives power.And diversity sub-miniature A connector is connected by radio frequency line
And receiving port, so that diversity transmission port is emitted the second predetermined power, measure receiving port the 4th receives power.It then can be with
Power, main collection port error, the line loss value of radio frequency line, the main collection line loss value of interface board and the second predetermined function are received based on third
Rate calculates the main collection line loss value between test bench and test equipment port.Power can be received based on the 4th, diversity port is missed
Difference, the line loss value of radio frequency line, the diversity line loss value of interface board and the second predetermined power calculate test bench and test equipment port
Between diversity line loss value.
Optionally, in the above-mentioned methods, main collection port error is the first reception power and the first predetermined power, radio frequency line
The difference of line loss value.Diversity port error is the second difference for receiving power and the first predetermined power, the line loss value of radio frequency line.
Optionally, in the above-mentioned methods, the main line loss value that integrates between test bench and test equipment port is third reception function
Rate and the second predetermined power, the main collection line loss value of interface board, the line loss value of radio frequency line, the difference of main collection port error.Test bench
Diversity line loss value between test equipment port is the 4th reception power and the second predetermined power, the diversity line loss of interface board
Value, the line loss value of radio frequency line, the difference of diversity port error.
Optionally, when the first predetermined power be equal to the second predetermined power, and the radio frequency line line loss value it is identical, test
The main main collection line loss for integrating line loss value and receiving power and the first reception power, interface board as third between seat and test equipment port
The difference of value.Diversity line loss value between test bench and test equipment port receives power with second for the 4th reception power, connects
The difference of the diversity line loss value of oralia.
Optionally, in the above-mentioned methods, test equipment is vector network analyzer.
According to another aspect of the present invention, a kind of line loss calibration system is provided, comprising: test equipment, fixture, interface
Plate, radio frequency line.
Wherein, test equipment may include main collection emission port, diversity transmission port and receiving port, be suitable for passing through main collection
Emission port and diversity transmission port transmission power, and test the reception power of receiving port.Interface board may include that main collection is surveyed
Try seat and main collection sub-miniature A connector, diversity test bench and diversity sub-miniature A connector.One end of fixture passes through radio frequency thimble connecting interface plate
Main collection test bench and diversity test bench, main collection emission port and diversity transmission end of the other end by radio frequency line connecting test instrument
Mouthful.Radio frequency line can connect main collection sub-miniature A connector and receiving port and/or connect diversity sub-miniature A connector and receiving port.
According to a further aspect of the invention, a kind of radio frequency parameter test method is provided, uses above-mentioned line loss school first
Quasi- method determines the line loss value between test bench and test equipment port, then based on determining line loss value, tests mobile terminal
Radio frequency parameter.
According to a further aspect of the present invention, a kind of radio frequency parameter test macro is provided, comprising: Mobile terminal main board, synthesis
Test equipment, fixture, power supply and calculating equipment.
Wherein, Mobile terminal main board, including radio frequency testing seat.Comprehensive tester can test penetrating for Mobile terminal main board
Test result is simultaneously returned to calculating equipment by frequency parameter.Fixture can connect comprehensive tester by radio frequency line, pass through radio frequency
Thimble connects radio frequency testing seat, provides power supply by connection power supply for Mobile terminal main board and calculates equipment to institute by connection
State Mobile terminal main board transmission of control signals.Power supply can provide power supply for fixture.Control can be transmitted to fixture by calculating equipment
Signal is received the test result that comprehensive tester returns, and can be adjusted the radio frequency parameter of mobile terminal based on test result.
Through the above scheme, the accuracy and efficiency of radio frequency testing is improved.Since the attribute of passive device is more stable, no
The case where will appear power swing.Golden machine is replaced using the radio frequency line and interface board of known line loss, mobile terminal radio frequency is tested
The topological line loss of system is calibrated, and is not required to frequently tear topology open.Test error can be reduced, provide guarantor for the quality of end product
Barrier.
Detailed description of the invention
To the accomplishment of the foregoing and related purposes, certain illustrative sides are described herein in conjunction with following description and drawings
Face, these aspects indicate the various modes that can practice principles disclosed herein, and all aspects and its equivalent aspect
It is intended to fall in the range of theme claimed.Read following detailed description in conjunction with the accompanying drawings, the disclosure it is above-mentioned
And other purposes, feature and advantage will be apparent.Throughout the disclosure, identical appended drawing reference generally refers to identical
Component or element.
Fig. 1 shows the schematic diagram of radio frequency parameter test macro 100 according to an embodiment of the invention；
Fig. 2 shows the schematic diagrams of line loss calibration system 200 according to an embodiment of the invention；
Fig. 3 shows the schematic diagram of interface board 220 according to an embodiment of the invention；
Fig. 4 shows the electrical block diagram that test bench according to an embodiment of the invention is connect with SMA interface；
Fig. 5 shows the schematic flow chart of line loss calibration method according to an embodiment of the invention；
Fig. 6 shows the schematic flow chart of radio frequency parameter test method according to an embodiment of the invention.
Specific embodiment
Exemplary embodiments of the present disclosure are described in more detail below with reference to accompanying drawings.Although showing the disclosure in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
It is limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
It is fully disclosed to those skilled in the art.
The mobile terminals such as mobile phone generally comprise mainboard test and the survey etc. eventually of calibration, complete machine in process of production, wherein mainboard
Calibration is the core of mobile phone producing test, and the main RF index including transmitter and receiver is calibrated.Radio frequency parameter index one
As include receiving level, transmission power, frequency error etc..Since the hardware deviation between printed circuit board component leads to radio frequency
Receive the deviation of emission parameter.Hardware coherence deviation band generally is compensated using the method for software parameter to the calibration of radio frequency parameter
The radio frequency parameter deviation come.Mobile phone can call calibrated parameter when real network works to optimize the performance of radio frequency.For
The accuracy of radio frequency parameter test is improved, present solution provides a kind of line loss calibration method and system.
Fig. 1 shows the schematic diagram of radio frequency parameter test macro 100 according to an embodiment of the invention.Such as
Shown in Fig. 1, radio frequency parameter test macro 100 includes: Mobile terminal main board 110, comprehensive tester 120, fixture 130, power supply
140 and calculate equipment 150, radio frequency line 160.
Wherein, Mobile terminal main board 110 includes radio frequency testing seat 111.It is installed on the printed circuit board of general mobile terminal
There is radio frequency testing seat, test equipment can test the radio-frequency performance of mobile terminal by radio frequency testing seat.Radio frequency testing seat packet
The probe insertion for including pedestal and being set on pedestal, connecting comprehensive tester 120 for the thimble with test fixture can survey
It tries the radio frequency parameter of Mobile terminal main board 110 and returns to test result to calculate equipment 150.Fixture 130 can pass through radio frequency
Line 160 connects comprehensive tester 120, connects radio frequency testing seat 111 by radio frequency thimble 112, is to move by connection power supply 140
Dynamic terminal mainboard 110 provides power supply and calculates equipment 150 to 110 transmission of control signals of Mobile terminal main board by connection.Electricity
Source 140 can be Mobile terminal main board power supply by fixture.Calculating equipment 150 can receive to 130 transmission of control signals of fixture
The test result that comprehensive tester 120 returns, and the radio frequency parameter of mobile terminal can be adjusted based on test result.
Wherein, comprehensive tester 120 may include multiple ports, and first port RFCOM1 and second is shown in Fig. 1
RFOUT1.In testing mobile phone receiver performance, comprehensive tester 120 exports radiofrequency signal and receives for mobile phone.In test hand
When machine transmitter performance, comprehensive tester 120 receives and demodulates the signal of handset emissions.Folder can be passed through by calculating equipment 150
USB control signal is transferred to mobile terminal by tool 130, so that mobile terminal according to the transmitting of control signal and receives power.It is comprehensive
Test result can be returned to calculating equipment by usb bus by test equipment 120, if test result, there are deviation, calculating is set
Standby 150 can control radio frequency parameter adjustment index, finally in the memory index adjusted write-in mobile terminal.
General antenna for mobile phone uses diversity receiving technology, i.e., on each channel with two antennas, main collection antenna is connected to
On the main collection interface of radio-frequency module, diversity antenna is connected on the diversity reception interface of radio-frequency module.It is main to collect responsible radiofrequency signal
Transmitting and reception, diversity be only receive do not send, the signal received from two interfaces can be merged processing by base station, thus
Obtain reception gain.In general 2G does not have diversity, and 3G is not essential, and 4G has to diversity.It therefore can be with testing mobile phone antenna
Main collection line loss and diversity line loss.In general, the cable in 50 Europe of characteristic impedance or 75 Europe just can be used as radio frequency line.That is
RF radiofrequency signal can be transmitted and the cable for having substantially no effect on radiofrequency signal quality is exactly radio frequency line.It is needed in mobile phone radio frequency test
Comprehensive tester 120 and fixture 130 are connected by radio frequency line 160.
Radio frequency thimble 112 heads into radio frequency testing seat 111, so that it may it is connected with Mobile terminal main board signal, it will be mobile whole
End transmitting signal passes on comprehensive tester 120, and receives the signal that comprehensive tester 120 emits.Comprehensive tester
There are two modules of signal source and signal analyzer inside device 120, outside passes through port jockey 130.Transmitting and reception test
Signal transmission path is different under both scenes, in order to obtain accurate results, needs calibration signal source, signal analysis respectively
The loss of instrument, fixture.
Fig. 2 shows the schematic diagrams of line loss calibration system 200 according to an embodiment of the invention.Such as Fig. 2
Shown, line loss calibration system 200 may include: test equipment 210, interface board 220, fixture, radio frequency line.
According to one embodiment of present invention, test equipment 210 is vector network analyzer.Vector network analyzer is one
The test equipment of kind electromagnetic wave energy.Not only it had been capable of measuring the various parameters amplitude of one port network or two-port network, but also phase can be surveyed
Position.Vector network analyzer can also include multiple ports, and three ports COM1, OUT1 and COM2 are used in this programme, can be with
It is used for transmission power as main collection emission port and diversity transmission port by COM1 or OUT1, COM2 to be used for as receiving port
Receive power.Interface board 220 may include radio frequency testing seat, main collection sub-miniature A connector, diversity sub-miniature A connector.Main collection sub-miniature A connector and master
Collect test bench connection, diversity sub-miniature A connector is connect with diversity test bench.One end of fixture 130 passes through 111 connecting interface of radio frequency thimble
The radio frequency testing seat of plate 220, the other end pass through the main collection emission port COM1 and diversity of two radio frequency line connecting test instruments 210
Emission port OUT1.The radio frequency line that known line loss value can be used connects main collection sub-miniature A connector and COM2 to test entire topology
Main collection line loss and/or connection diversity sub-miniature A connector test the diversity line loss of entire topology with COM2.
Wherein, interface board 220 set according to the size with Mobile terminal main board, radio frequency testing seat, the position of mounting hole, electricity
Structure of road topology etc. unanimously makes.Fig. 3 shows the schematic diagram of interface board 220 according to an embodiment of the invention.
As shown in figure 3, interface board 220 may include three sub-miniature A connectors, including the main collection sub-miniature A connector for testing antenna line loss, diversity
Sub-miniature A connector and WiFi sub-miniature A connector (being not directed in this programme) for testing WiFi access line loss.SMA radio antenna interface
It is the abbreviation of Sub-Miniature-A, be antenna terminal be internal threaded the inside contact is that (wireless device one end is outer to needle
It is pipe that, which there is contact inside screw thread in portion).The wireless device of this interface is most most popular, the wherein position of radio frequency testing seat and shifting
Dynamic terminal mainboard is completely the same, interface board 220 can be made to be completely placed in fixture in this way.The radio frequency thimble of fixture can be inserted
Enter in radio frequency test bench.In order to interfere interface board with fixture, sub-miniature A connector can be extended outwardly a distance, while its
The place of he and fixture interference carry out hollowing out processing at thimble of powering, USB transmission thimble and the physical structure of some supports,
To guarantee 220 energy of interface board and clamp adaptor, guarantee that the radio frequency thimble of fixture is well contacted with radio frequency testing seat.In addition, in order to
Guarantee is consistent with the height of Mobile terminal main board, and shielding cover stent can also be welded on interface board.
According to one embodiment of present invention, test bench is connect by π type attenuation network with sub-miniature A connector, and T also can be used
Type attenuation network realizes that signal decays and keeps input impedance constant, herein without limitation.Fig. 4 shows according to the present invention one
The circuit diagram that the test bench of a embodiment is connect with SMA interface.As shown in figure 4, the left side is test bench, the right connects for SMA
Head, centre are π type attenuation network.The power grade involved in radio-frequency transmissions test is generally higher, and powerful signal is necessary
It just may be coupled in test equipment through overdamping, otherwise will cause the damage to test equipment.π type attenuation network is a nothing
Source two-port network, the purpose of π type attenuation network are the mismatches reduced between port, it is ensured that the resistance entered in terms of signal source end
The matching of anti-and signal source impedance, the impedance matching of the impedance and load that are looked over from load end.Furthermore it is needed near sub-miniature A connector
Headroom processing, can improve standing wave in this way, reduce reflection.
After the production for completing interface board according to above-mentioned method, so that it may use the radio frequency line of interface board and known line loss value
Line loss value between test bench and test equipment is calibrated, so as to based on test bench to the line loss value between test equipment,
The radio frequency parameter of mobile terminal is tested, thus the RF index based on test result adjustment mobile terminal.
Fig. 5 shows the schematic flow chart of line loss calibration method according to an embodiment of the invention.Such as Fig. 5 institute
Show, first in step S510, can by test equipment measure interface board line loss value, interface board include at least test bench and
The wireless aerial connector sub-miniature A connector being connect with test bench.
Interface board still may be used as the internal electric characteristic of Mobile terminal main board to be tested by call switching card, interface board
To provide frequency adjustment and voltage adjustment.Interface board mainly converts the interface of different structure, such as will in this programme
Thimble interface conversion is SMA interface.Wherein, there are two types of forms for SMA interface, and the sub-miniature A connector of standard is one end " external screw thread+hole ",
The other end " internal screw thread+needle "；Reversed polarity RP-SMA is one end " external screw thread+needle ".SMA connector is suitable for microwave equipment and number
Radio-frequency cable or microstrip line are connected in the loop of rf of communication system.The interface of general fixture is thimble, in this way passes through fixture
The radio frequency testing seat of thimble connecting interface plate, then connect by SMA interface with test equipment, it is capable of the line loss of test fixture.First
Line loss is tested, has line loss value that could calibrate model machine later.
The port COM1 and OUT1 of test equipment is generally used when as shown in Fig. 2, calibrating in the production line to radio frequency parameter,
Wherein main collection uses COM1, and diversity uses OUT1.The port COM2 be it is idle, power is sent out using COM1 and OUT1 in this programme,
Using the received method of COM2, main collection test line loss is that power is sent out by COM1, and COM2 receives power, and it is logical that diversity, which tests line loss,
OUT1 hair power is crossed, COM2 receives power.It is calculated from radio frequency seat to survey by calculating transmitting and receiving the power difference of signal
Line loss between test instrument port.
Wherein test bench may include main collection test bench and diversity test bench, and correspondingly, sub-miniature A connector may include main collection
Sub-miniature A connector and diversity sub-miniature A connector, main collection sub-miniature A connector and diversity sub-miniature A connector pass through attenuation network and main collection test bench respectively and divide
Collect test bench connection.
The line loss of vector network analyzer measurement each frequency range of the main diversity of interface board can be used.Due in wireless product,
Transmitting receives the frequency of wireless signal and the frequency range one-to-one correspondence of product support, the frequency of each frequency range and product support that herein refer to
Rate corresponds, for example, mobile phone support LTE B1 (tranmitting frequency 1920-1980MHz, receive frequency 2110-2170MHz) due to
This frequency is supported, so needing to test the line loss under the frequency.
According to one embodiment of present invention, one end of vector network analyzer (hereinafter referred to as arrow net) can be made to pass through to buckle
Line connects main collection test bench, and the other end connects main collection sub-miniature A connector by radio frequency line, measures the main collection line loss value of port network.Its
One end of middle fastening wire be can connector matched with test bench, the other end is sub-miniature A connector.For two-port network, there are four S to join
Number, that is, scattering parameter.It is an important parameter in microwave transmission.S12 is reverse transfer coefficient, that is, is isolated.S21
For positive transmission coefficient, that is, gain.S11 is input reflection coefficient, that is, input return loss, and S22 is output reflection
Coefficient, that is, output return loss.The line loss value of two-port network is line loss when testing S21 between 1 and 2 port
Value, that is, swear online S21.S21 is the s-matrix parameter of 2 port networks, characterizes the line loss value of entire two-port network, represents arrow
The line loss value of coupling part between two ports of net.Usually using the S ginseng of vector network analyzer (VNA) measurement RF Components
Number.
Then can main collection line loss value, the line loss value of the line loss value of fastening wire and radio frequency line based on two-port network, meter
Calculate the main collection line loss value of the interface board.The main collection line loss value of interface board is equal to the line loss value and two that S21 test value subtracts fastening wire
The line loss value for holding the radio frequency line of sub-miniature A connector, can be denoted as C1.
Likewise it is possible to which the one end for netting arrow connects diversity test bench by fastening wire, the other end passes through radio frequency line connection point
Collect sub-miniature A connector, measures the diversity line loss value of two-port network.It network-based diversity line loss value, the line loss value of buckle line and penetrates
The line loss value of frequency line calculates the diversity line loss value of the interface board, can be denoted as C2.Wherein, C1 and C2 is negative value.
Then in step S520, test equipment can be measured by the radio frequency line of the known line loss value of test equipment sum
Port error.
Since the COM1 and OUT1 power emitted and COM2 are actually received, to power, there are errors, therefore need to pass through calibration
Port error.According to one embodiment of present invention, main collection emission port COM1 and receiving port can be connected by radio frequency line
COM2 makes the main collection emission port emit the first predetermined power, and measure receiving port first receives power.Pass through radio frequency line
Diversity transmission port OUT1 and receiving port COM2 is connected, diversity transmission port is made to emit the first predetermined power, measures receiving end
The second of mouth receives power.
The line loss value that power and radio frequency line can be received based on the first predetermined power, first, calculates the master of test equipment
Collect port error.The line loss value that power and radio frequency line are received based on the first predetermined power, second, calculates the diversity end of test equipment
Slip of the tongue is poor.
For example, can control the CW wave of arrow net sending -5dbm, CW wave is continuous wave radiofrequency signal, actually sine wave
Do carrier wave.Other values can be selected in real process, first is that too low performance number cannot be chosen, be easy in this way by environmental fluctuating
Test accuracy is influenced, second is that since arrow net signal generator maximum transmission power is restricted unconfined big function cannot be chosen
Rate.To sum up, biggish power can be chosen as far as possible in arrow net allowed band.If the line loss value of radio frequency line is C, C is negative value, if
It is respectively A1 and A2 that first received, which receives power and the second reception power, if main collection port error (COM1 to COM2) is
C3, diversity port error (OUT1 to COM2) is C4, then C3=A1+5-C；C4=A2+5-C.
It, can line loss value based on interface board, the line loss value of radio frequency line and test equipment then in step S530
Port error determines the line loss value between test bench and test equipment port.
According to one embodiment of present invention, main collection sub-miniature A connector and receiving port can be connected by radio frequency line, make main collection
Emission port emits the second predetermined power, and the third for measuring receiving port receives power.Diversity sub-miniature A connector is connected by radio frequency line
And receiving port, so that diversity transmission port is emitted the second predetermined power, measure receiving port the 4th receives power.
As shown in Fig. 2, one end of radio frequency line is connected the port instrument COM2, one end and interface board master when testing main collection line loss
Collect sub-miniature A connector to be connected.Control arrow net is respectively from the CW wave of COM1 and OUT1 sending -5dBm, and recording apparatus is received from COM2
Power, third receive power and the 4th reception power can be denoted as respectively B1, B2.It is also possible to the power of other numerical value, only
Emit same power when being with above-mentioned test equipment port error and facilitates calculating, it, so finally can will if sending out power same
Transmission power -5dBm is balanced out, and there is no relationships for the power of line loss and the instrument hair actually obtained.
Power, main collection port error, the line loss value of radio frequency line, the main collection line loss value of interface board can be received based on third
And second predetermined power, calculate the main collection line loss value between test bench and test equipment port；Power is received based on the 4th, is divided
Collect port error, the line loss value of radio frequency line, the diversity line loss value of interface board and the second predetermined power, calculates test bench and test
Diversity line loss value between instrument port.
It can calculate and obtain main collection entire access line loss L1=B1+5-C1-C-C3, diversity access line loss L2=B2+5-C2-
C-C4.When the first predetermined power is equal to the second predetermined power, i.e. step S510 is damaged with survey line in S520, transmission power is consistent, then
It is main collection emission port test bench and test equipment port between it is main integrate line loss value be third receive power and first reception power,
The difference of the main collection line loss value of interface board；Diversity line loss value between test bench and test equipment port be the 4th receive power with
Second receives the difference of the diversity line loss value of power, interface board.
Due to the C3=A1+5-C being the previously calculated；C4=A2+5-C.So L1=B1-A1-C1, L2=B2-A2-
C2；Wherein B1, B2, A1, A2 are the performance numbers of actual measurement, and C1, C2 are the line loss value on the interface board plate that measurement obtains.In we
Radio frequency line used in case is all the identical radio frequency line of known line loss value.It is obtained with actual use fixture test time shift in this way
Main collection test bench is to instrument port COM1 and diversity test bench to the line loss of instrument port OUT1 when dynamic terminal mainboard.By above
Calculated result is it is found that the line loss of radio frequency line can balance out, as long as (guaranteeing in instrument port error school in line loss test process
Line when line and last line loss on time is calibrated is same root) it is calibrated using the radio frequency line of same line loss value, so that it may
To require no knowledge about the line loss value of radio frequency line.
Interface board only measures line loss, after measuring line loss, just removes interface board, is put into cell phone mainboard, utilizes
It tests obtained line loss and carries out mobile phone calibration.Fig. 6 shows radio frequency parameter test method according to an embodiment of the invention
Schematic flow chart.As shown in fig. 6, the test bench and tester that are obtained in step S600 based on above-mentioned line loss calibration method
Line loss value between device port, tests the radio frequency parameter of mobile terminal.The normal operating process structure that can be tested according to production line
Build test macro.As shown in Figure 1, in the test bench of the radio frequency thimble insertion Mobile terminal main board of fixture, so that it may and mobile phone letter
Number connection, handset emissions are signally attached to thimble and are passed on test equipment, complete mobile phone radio frequency parameter test.
This programme is easy to operate, substitutes golden machine using interface board, avoids golden machine power swing or damages after being used for a long time
The case where, it does not need frequently to dismantle test topology, only need to connect a radio frequency line using the idle port of test equipment and carry out line
Damage calibration.
A10, the method as described in any one of A1-9, wherein the test equipment is vector network analyzer.
A12, a kind of radio frequency parameter test method, wherein include: to be calibrated using the line loss as described in any one of A1-10
Method obtains the line loss value between test bench and test equipment port；Line loss value based on acquisition, tests the mobile terminal
Radio frequency parameter.
A13, a kind of radio frequency parameter test macro, wherein include: Mobile terminal main board, including radio frequency testing seat；It is comprehensive to survey
Test instrument, suitable for testing the radio frequency parameter of the Mobile terminal main board and test result being returned to calculating equipment；Fixture is suitable for
The comprehensive tester is connected by radio frequency line, the radio frequency testing seat is connected by radio frequency thimble, is by connecting power supply
The Mobile terminal main board provides power supply and calculates equipment to the Mobile terminal main board transmission of control signals by connection；Electricity
Source is suitable for the fixture and provides power supply；Equipment is calculated, is suitable for receiving comprehensive tester to the fixture transmission of control signals
The test result that device returns.
It should be appreciated that in order to simplify the disclosure and help to understand one or more of the various inventive aspects, it is right above
In the description of exemplary embodiment of the present invention, each feature of the invention be grouped together into sometimes single embodiment, figure or
In person's descriptions thereof.However, the disclosed method should not be interpreted as reflecting the following intention: i.e. claimed hair
Bright requirement is than feature more features expressly recited in each claim.More precisely, as the following claims
As book reflects, inventive aspect is all features less than single embodiment disclosed above.Therefore, it then follows specific real
Thus the claims for applying mode are expressly incorporated in the specific embodiment, wherein each claim itself is used as this hair
Bright separate embodiments.
Those skilled in the art should understand that the module of the equipment in example disclosed herein or unit or groups
Part can be arranged in equipment as depicted in this embodiment, or alternatively can be positioned at and the equipment in the example
In different one or more equipment.Module in aforementioned exemplary can be combined into a module or furthermore be segmented into multiple
Submodule.
Those skilled in the art will understand that can be carried out adaptively to the module in the equipment in embodiment
Change and they are arranged in one or more devices different from this embodiment.It can be the module or list in embodiment
Member or component are combined into a module or unit or component, and furthermore they can be divided into multiple submodule or subelement or
Sub-component.Other than such feature and/or at least some of process or unit exclude each other, it can use any
Combination is to all features disclosed in this specification (including adjoint claim, abstract and attached drawing) and so disclosed
All process or units of what method or apparatus are combined.Unless expressly stated otherwise, this specification is (including adjoint power
Benefit require, abstract and attached drawing) disclosed in each feature can carry out generation with an alternative feature that provides the same, equivalent, or similar purpose
It replaces.
In addition, it will be appreciated by those of skill in the art that although some embodiments described herein include other embodiments
In included certain features rather than other feature, but the combination of the feature of different embodiments mean it is of the invention
Within the scope of and form different embodiments.For example, in the following claims, embodiment claimed is appointed
Meaning one of can in any combination mode come using.
Various technologies described herein are realized together in combination with hardware or software or their combination.To the present invention
Method and apparatus or the process and apparatus of the present invention some aspects or part can take insertion tangible media, such as it is soft
The form of program code (instructing) in disk, CD-ROM, hard disk drive or other any machine readable storage mediums,
Wherein when program is loaded into the machine of such as computer etc, and is executed by the machine, the machine becomes to practice this hair
Bright equipment.
In the case where program code executes on programmable computers, calculates equipment and generally comprise processor, processor
Readable storage medium (including volatile and non-volatile memory and or memory element), at least one input unit, and extremely
A few output device.Wherein, memory is configured for storage program code；Processor is configured for according to the memory
Instruction in the said program code of middle storage executes method of the present invention.
By way of example and not limitation, computer-readable medium includes computer storage media and communication media.It calculates
Machine readable medium includes computer storage media and communication media.Computer storage medium storage such as computer-readable instruction,
The information such as data structure, program module or other data.Communication media is generally modulated with carrier wave or other transmission mechanisms etc.
Data-signal processed passes to embody computer readable instructions, data structure, program module or other data including any information
Pass medium.Above any combination is also included within the scope of computer-readable medium.
In addition, be described as herein can be by the processor of computer system or by executing by some in the embodiment
The combination of method or method element that other devices of the function are implemented.Therefore, have for implementing the method or method
The processor of the necessary instruction of element forms the device for implementing this method or method element.In addition, Installation practice
Element described in this is the example of following device: the device be used for implement as in order to implement the purpose of the invention element performed by
Function.
Unless specifically stated, it is merely representative of using ordinal number " first ", " second ", " third " etc. to describe plain objects
Be related to the different instances of similar object, and be not intended to imply the object that is described in this way must have the time it is upper, spatially,
Sequence aspect or given sequence in any other manner.
Although the embodiment according to limited quantity describes the present invention, above description, the art are benefited from
It is interior it is clear for the skilled person that in the scope of the present invention thus described, it can be envisaged that other embodiments.Additionally, it should be noted that
Language used in this specification primarily to readable and introduction purpose and select, rather than in order to explain or limit
Determine subject of the present invention and selects.Therefore, without departing from the scope and spirit of the appended claims, for this
Many modifications and changes are obvious for the those of ordinary skill of technical field.For the scope of the present invention, to this
Invent done disclosure be it is illustrative and not restrictive, it is intended that the scope of the present invention be defined by the claims appended hereto.
Claims (10)
1. a kind of line loss calibration method is suitable for mobile terminal, wherein the described method includes:
The line loss value of interface board, the nothing that the interface board includes at least test bench and connect with test bench are measured by test equipment
Line electricity antenna terminal sub-miniature A connector；
The port error of test equipment is measured by the radio frequency line of the known line loss value of test equipment sum；And
The line loss value of line loss value, the radio frequency line based on the interface board and the port error of the test equipment determine
Line loss value between the test bench and test equipment port.
2. the method for claim 1, wherein the both ends of the radio frequency line have sub-miniature A connector.
3. the method for claim 1, wherein
The test bench includes main collection test bench and diversity test bench, and the sub-miniature A connector includes main collection sub-miniature A connector and diversity SMA
Connector, the main collection sub-miniature A connector and diversity sub-miniature A connector pass through attenuation network and main collection test bench respectively and diversity test bench connects
It connects.
4. method as claimed in claim 3, wherein it is described by test equipment measure interface board line loss value the step of wrap
It includes:
One end of the test equipment is set to connect the main collection test bench by fastening wire, the other end connects the master by radio frequency line
Collect sub-miniature A connector, measures the main collection line loss value of two-port network；
Main collection line loss value, the line loss value of the line loss value of fastening wire and radio frequency line based on two-port network, calculate the interface board
Main collection line loss value；And
One end of the test equipment is set to connect the diversity test bench by fastening wire, the other end passes through described point of radio frequency line connection
Collect sub-miniature A connector, measures the diversity line loss value of two-port network；
The line loss value of diversity line loss value, the line loss value of buckle line and radio frequency line based on two-port network, calculates the interface board
Diversity line loss value.
5. method as claimed in claim 3, the test equipment includes at least main collection emission port, diversity transmission port and connects
Receiving end mouth, wherein it is described by test equipment and have sub-miniature A connector radio frequency line measure test equipment port error the step of
Include:
The main collection emission port and receiving port are connected by radio frequency line, the main collection emission port is made to emit the first predetermined function
Rate, measure receiving port first receive power；
The diversity transmission port and receiving port are connected by radio frequency line, the diversity transmission port is made to emit the first predetermined function
Rate, measure receiving port second receive power；
The line loss value that power and radio frequency line are received based on first predetermined power, first, calculates the main collection port of test equipment
Error；And
The line loss value that power and radio frequency line are received based on first predetermined power, second, calculates the diversity port of test equipment
Error.
6. method as claimed in claim 5, wherein
The main collection port error is the first reception power and first predetermined power, the difference of the line loss value of radio frequency line
Value；
Diversity port error is the second reception power and first predetermined power, the difference of the line loss value of radio frequency line
Value.
7. method as claimed in claim 5, wherein the line loss value based on the interface board, the line loss of the radio frequency line
The port error of value and the test equipment, the step of determining the line loss value between the test bench and test equipment port packet
It includes:
Main collection sub-miniature A connector and receiving port are connected by radio frequency line, so that the main collection emission port is emitted the second predetermined power, surveys
The third for measuring receiving port receives power；
Diversity sub-miniature A connector and receiving port are connected by radio frequency line, the diversity transmission port is made to emit the second predetermined power, is surveyed
Measure receiving port the 4th receives power；And
Based on the third receive power, the main collection port error, the line loss value of radio frequency line, the main collection line loss value of interface board with
And second predetermined power, calculate the main collection line loss value between the test bench and test equipment port；
Based on it is described 4th receive power, diversity port error, the line loss value of radio frequency line, the diversity line loss value of interface board with
And second predetermined power, calculate the diversity line loss value between the test bench and test equipment port.
8. the method for claim 7, wherein
Main collection line loss value between the test bench and test equipment port be the third receive power and the second predetermined power,
Main collection line loss value, the line loss value of radio frequency line, the difference of main collection port error of interface board；
Diversity line loss value between the test bench and test equipment port be the described 4th receive power and the second predetermined power,
Diversity line loss value, the line loss value of radio frequency line, the difference of diversity port error of interface board.
9. the method for claim 7, wherein and described when first predetermined power is equal to the second predetermined power
The line loss value of radio frequency line is identical,
Main collection line loss value between the test bench and test equipment port be the third receive power and the first reception power,
The difference of the main collection line loss value of interface board；
Diversity line loss value between the test bench and test equipment port be the described 4th receive power and the second reception power,
The difference of the diversity line loss value of interface board.
10. a kind of line loss calibration system, wherein include:
Test equipment, including main collection emission port, diversity transmission port and receiving port are suitable for through main collection emission port and divide
Collect emission port transmission power, and tests the reception power of receiving port；
Interface board, including main collection test bench and main collection sub-miniature A connector, diversity test bench and diversity sub-miniature A connector；
Fixture, one end of the fixture connect the main collection test bench and diversity test bench of the interface board by radio frequency thimble, separately
Main collection emission port and diversity transmission port of the one end by radio frequency line connecting test instrument；
Radio frequency line is adapted to main collection sub-miniature A connector and receiving port, diversity sub-miniature A connector and receiving port.
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| CN110995372A (en) * | 2019-11-30 | 2020-04-10 | 惠州Tcl移动通信有限公司 | Wireless communication terminal, power detection circuit and power calibration method |
| CN111225060A (en) * | 2020-01-10 | 2020-06-02 | 杭州涂鸦信息技术有限公司 | Radio frequency-based index safety testing method and system |
| CN111257672A (en) * | 2020-02-11 | 2020-06-09 | 深圳市广和通无线股份有限公司 | Line loss point inspection method and device, computer equipment and storage medium |
| CN112019279A (en) * | 2020-09-16 | 2020-12-01 | 歌尔科技有限公司 | Line loss calibration method, device and system and computer readable storage medium |
| CN112182997A (en) * | 2020-09-04 | 2021-01-05 | 曙光信息产业(北京)有限公司 | Scattering parameter determination method and device, computer equipment and storage medium |
| CN112737706A (en) * | 2021-01-06 | 2021-04-30 | 深圳市精泰达科技有限公司 | Test fixture radio frequency calibration system and method |
| CN113419189A (en) * | 2020-08-06 | 2021-09-21 | 为准（北京）电子科技有限公司 | Line loss testing method, comprehensive tester and storage medium |
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| CN110995372A (en) * | 2019-11-30 | 2020-04-10 | 惠州Tcl移动通信有限公司 | Wireless communication terminal, power detection circuit and power calibration method |
| CN111225060A (en) * | 2020-01-10 | 2020-06-02 | 杭州涂鸦信息技术有限公司 | Radio frequency-based index safety testing method and system |
| CN111257672A (en) * | 2020-02-11 | 2020-06-09 | 深圳市广和通无线股份有限公司 | Line loss point inspection method and device, computer equipment and storage medium |
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| CN113419189A (en) * | 2020-08-06 | 2021-09-21 | 为准（北京）电子科技有限公司 | Line loss testing method, comprehensive tester and storage medium |
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| CN112019279B (en) * | 2020-09-16 | 2022-08-19 | 歌尔科技有限公司 | Line loss calibration method, device and system and computer readable storage medium |
| CN112737706B (en) * | 2021-01-06 | 2022-12-13 | 深圳市精泰达科技有限公司 | Test fixture radio frequency calibration system and method |
| CN112737706A (en) * | 2021-01-06 | 2021-04-30 | 深圳市精泰达科技有限公司 | Test fixture radio frequency calibration system and method |
| CN114006662A (en) * | 2021-09-24 | 2022-02-01 | 荣耀终端有限公司 | Antenna detection device, system and antenna detection method |
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| 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 |
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