CN205566320U - System based on test passive component power capacity - Google Patents
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- CN205566320U CN205566320U CN201620181773.9U CN201620181773U CN205566320U CN 205566320 U CN205566320 U CN 205566320U CN 201620181773 U CN201620181773 U CN 201620181773U CN 205566320 U CN205566320 U CN 205566320U
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Abstract
The utility model relates to a system based on test passive component power capacity, include: computer, signal generating unit, 3dB electric bridge, directional dual coupling, duplexer that the order is connected to reach the power meter of being connected with directional dual coupling, power meter and computer link, the duplexer is used for connecting the piece that awaits measuring. The utility model discloses the configuration is more nimble on the overall structure of system, can carry out nimble upgrading according to the characteristic of system, and the lowering system uses the function upgrading expense of mechanism.
Description
Technical field
This utility model relates to a kind of test system, a kind of system based on testing passive device power capacity.
Background technology
At present, the data that mobile communication system is carried get more and more, therefore more and more higher to the power requirement of device, development especially as 4G technology, when device produces arcing owing to power capacity is not enough, device burns, device index deteriorates, these all can reduce the reliability and safety of mobile communication system, it is proposed the system for power capacity test based on this some scientific research inspection bodies and some enterprises in the communications industry, but in the function and realization of system, there is no thinking clearly: such as average and the requirement of peak value, system belongs to builds temporarily, in stability, authority is not possessed on accuracy；And the angle that existing similar platform is also based on products application goes to test the power capacity index of passive product, is not suitable for research and development of products and data analysis.
Utility model content
For above-mentioned technical deficiency, the purpose of this utility model provides a kind of system based on testing passive device power capacity.
This utility model solves its technical problem and be the technical scheme is that a kind of system based on testing passive device power capacity, including: the computer that is linked in sequence, signal generating unit, 3dB electric bridge, dual directional coupler, duplexer, and the energy meter being connected with dual directional coupler；Described energy meter is connected with computer；Described duplexer is used for connecting part to be measured.
Described signal generating unit includes two signal generation branch roads；Signal generator that described signal generation branch road includes being linked in sequence, power amplifier, wave filter；Described signal generator is connected with computer；Described wave filter is connected with 3dB electric bridge input；
Described power is calculated as two.
A kind of system based on testing passive device power capacity also includes the spectrum analyzer being connected with duplexer.
Described part outfan to be measured is connected with attenuator, and attenuator is connected with computer by energy meter 3.
Described power amplifier is multi-stage power amplifier.
Described signal generating unit, 3dB electric bridge, dual directional coupler, duplexer, spectrum analyzer and energy meter are placed in and set in air-conditioned rack.
This utility model has the advantages that and advantage:
1. native system have employed the dual directional coupler in broadband and carries out launching power and the collection of reflection power, and with the collection to arcing signal of the duplexer of high-isolation.
2. configure more flexible on overall system architecture, can upgrade flexibly according to the characteristic of system, reduce system and use the function upgrading expense of mechanism.
3. the embedded semiconductor TEC air-conditioning that native system uses model to be TC06-040JFH/01, above-mentioned design is used to make the noise of system can be reduced to less than 50 decibels, the operating temperature of system maintains less than 50 DEG C, and other kinds of power capacity test platform is above 50 DEG C due to its operating temperature of reason of temperature rise.
5, native system uses multi-stage power amplifier, first level uses low noise amplifier, second level power amplifier carries out final stage amplification, owing to using the mentality of designing of multistage amplification to make system be obviously improved with the contrast of other kinds of power capacity test platform in stability and intermodulation suppression.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Detailed description of the invention
Below in conjunction with embodiment, this utility model is described in further detail.
As it is shown in figure 1, native system is made up of signal source, power amplifier, wave filter, 3dB electric bridge, dual directional coupler, energy meter, spectrum analyzer, duplexer, attenuator, computer；Wherein the delivery outlet of signal source is connected with the input port (RF IN) of power amplifier by radio-frequency cable, and the delivery outlet (RFOUT) of power amplifier is connected by the input port of radio-frequency cable with 3dB electric bridge；The delivery outlet of 3dB electric bridge connects the input port of dual directional coupler；The forward coupling aperture of dual directional coupler connects forward power detection energy meter 1, and dual directional coupler reverse coupled mouth connects backward power detection energy meter 2；The delivery outlet of dual directional coupler is connected with duplexer emission port (TX), and the delivery outlet (ANT) of duplexer is connected with measured device, and the receiving port (RX) of duplexer is connected with spectrum analyzer；If measured device is the input port that through-type devices delivery outlet connects attenuator, the delivery outlet of attenuator connects energy meter 3 by radio-frequency cable；Computer is connected with energy meter 1, energy meter 2, energy meter 3, signal source 1, signal source 2, spectrum analyzer respectively by gpib interface；Supply module is responsible for powering to power amplifier and signal source, spectrum analyzer, energy meter.
Described signal generating unit, carries out closing road for receiving trigger command transmitting multiple modulated signals to the 3dB electric bridge of computer；
Described dual directional coupler, is used for the modulated signal after closing road and isolates device detection power by forward coupling aperture, and reverse coupled mouth isolates the reflection power of measured device, and the delivery outlet of dual directional coupler carries out low-loss and exports to duplexer；
Described duplexer, for the input power of measured device being separated with reflection power, and sends the reflection power of device to spectrum analyzer, and the test signal transmission that the delivery outlet of duplexer would be required to is to part to be measured；
Described computer, for being gathered the input power of measured device by energy meter, reflection power and obtain standing-wave ratio, and the most normal with the multilevel iudge measured piece of threshold value according to standing-wave ratio；Quantity by spectrum analyzer detecting system arcing.
Described signal generator launches the modulated signal of two carrier waves, filters out of band signal send to 3dB electric bridge through power amplifier amplification, the most filtered device.
Described spectrum analyzer is connected with computer, for the arcing signal of duplexer output carries out peak detection, and the arcing quantity detected is sent to computer by netting twine.
Described signal generating unit, 3dB electric bridge, dual directional coupler, duplexer, spectrum analyzer and energy meter 1, energy meter 2 are all located in integrated cabinet.It is provided with the quasiconductor TEC air-conditioning that model is TC06-040JFH/01 in rack, system can be made to be in suitable environment.
Described attenuator is for gathering the output signal of part to be measured and feeding back to computer by energy meter 3.
Operation principle: signal generator 1 and signal generator 2 launch the modulated signal of two carrier waves respectively, ingoing power amplifier carries out power amplification, device carries out filtering of signal out of band signal after filtering, carrier wave after being modulated 4 by 3dB electric bridge again carries out closing road, as a example by test 200W, the most each carrier wave is 50W；Signal behind 3dB electric bridge Zai Jianghe road exports to dual directional coupler, now the power of forward coupling aperture and reverse coupled mouth can be acquired by energy meter 1 and energy meter 2, computer reads forward power and backward power by gpib interface, and the calculating process of standing-wave ratio is:
Setting standing wave as VSWR, ξ is reflection coefficient, and RL is return loss, and forward power is W1, and reflection power is W2, according to the formula of standing-wave ratio:
Standing-wave ratio VSWR=(1+ ξ)/(1+ ξ)
Wherein RL=10Lg (W1/W2), RL=-20lg ξ, therefore computer just can calculate the change of standing-wave ratio of test product after reading forward power and reflection power；The delivery outlet of dual directional coupler is connected to the emission port (TX) of duplexer, the RX port of duplexer can be inputted producing arcing because device power capacity is bad to spectrum analyzer by the reflex port (RX) of duplexer, and spectrum analyzer can carry out peak detection to the signal of input in the working frequency range required；The output port (ANT) of duplexer connects measured device, if device under test is absorption-type device such as load etc., does not the most reconnect other modules；If by type device (such as power splitter, bonder, attenuator etc.), then the coupling aperture at device to install low intermodulation load, the output port of measured device connects the input port of low intermodulation attenuator, after attenuator, the delivery outlet of attenuator connects energy meter 3, the signal power variations of computer monitoring energy meter 3.
Functions and technology require as follows:
1. signal source: according to the multiple multicarrier modulated signal of the instruction issue of computer, such as: GMSK signal, CDMA signal, EDGE signal, WCDM signal, TD-LTE signal, FDD-LTE signal；This signal source uses the N5182A of Agilent, can configure various different modulated signal flexibly according to test request.
Technology requires: (1) working frequency range: 100KHz-3GHz；(2) output signal level scope :-110dBm～+11dBm.
2. power amplifier: signal source being launched the modulated signal come and is amplified, use Multi-Carrier Power Amplifier, peak power output average can reach 500W, peak value 2500W.The power amplifier of each pattern forms by promoting stage power amplifier, output-stage power amplifier；Difference according to test pattern is divided into GSM standard power amplifier, CDMA standard power amplifier, WCDMA standard power amplifier, TD-LTE standard power amplifier, FDD-LTE standard power amplifier etc..
Technology requires: (1) running voltage: DC48V；(2) output: 57dBm (single carrier, average)
(2) gain: 50dB；(4) band stray :≤-40dBm.
3. wave filter: the radiofrequency signal that can launch signal source filters, signal outside to working band filters, this module is the pluggable module of test system, is divided into GSM wave filter, CDMA wave filter, WCDMA wave filter, TD-LTE wave filter, FDD-LTE wave filter etc. according to the difference of test sample.
Technical parameter: (1) working frequency range: GSM wave filter: 925MHz-960MHz, CDMA wave filter: 860MHz-880MHz, WCDMA wave filter: 2110MHz-2170MHz, TD-LTE wave filter 1:1875MHz-1920MHz&2010MHz-2025MHz&2320-2370MHz&2570-2650 MHz, FDD-LTE:1830MHz-1880MHz wave filter etc..(2) Out-of-band rejection :-65dBc/100KHz；(3) power capacity: 1000W (average), 8000W (peak value).
4. dual directional coupler: detecting system forward output signal level size, detection transmitting watt level, the forward and reverse power being detected is for calculating system standing wave change under test mode.
(1) working frequency range: 765MHz-2700MHz；(2) degree of coupling: forward degree of coupling 50dB, reverse coupled degree: 40dB；(3) insertion loss :≤0.45dB；(4) standing-wave ratio :≤1.1；(5) power capacity: 1000W (average), 8000W (peak value)；
5. duplexer: the arcing produced due to device power off-capacity for detection, set the frequency range of measured power capacity as TX, then arcing can fall into the frequency range beyond TX, and according to the needs of mobile communication system design, whole working frequency range is not monitored, only reception frequency range RX that test frequency range is corresponding need to be carried out test and can meet design requirement, and reception frequency range RX of other system is owing to self existing for isolation between system under test (SUT), interference is negligible.
Technical parameter: (1) working frequency range
GSM duplexer: 925MHz-960MHz&880MHz-915MHz, CDMA duplexer: 860MHz-880MHz&815-835MHz, WCDMA duplexer: 2110MHz-2170MHz&1920-1970MHz, FDD-LTE duplexer: 1805MHz-1880MHz&11710-1785MHz etc.；(2) insertion loss: GSM duplexer, CDMA duplexer≤1.0dB；WCDMA duplexer FDD-LTE duplexer≤1.3dB；(3) standing wave :≤1.1；(4) power capacity: 1000W (average), 8000W (peak value)；(5) interport isolation: >=80dB；
6. attenuator: signal level may be the biggest after measured device for this system output signal, with the cavity 10dB bonder that mobile communication system is conventional, its straight-through loss only has about 1dB, assuming that measured power is 300W, then the power after measured device still can reach about 200W, this power for the energy meter of follow-up access is the biggest, it is considered to this increases the attenuator of a 50dB in the middle of this system.
Technical parameter: (1) working frequency range: 765MHz-3GHz；(2) pad value and attenuation accuracy: 50dB, ± 0.5；(3) standing-wave ratio :≤1.1.
7. energy meter: energy meter 1 is for detecting the forward power of dual directional coupler, and energy meter 2 is for detecting the backward power of dual directional coupler.Energy meter 3: change for detecting system output, according to power capacity test request, when the output change of through-type device its signal after large power test signal should be within 3dB.
Technical parameter: (1) working frequency range: 9KHz-7.5GHz；(2) receiving sensitivity :-50dBm；(3) maximal input :+30dBm.
8. computer: the switch of control system signal；The standing wave being reacted measured device by the numerical value of monitoring energy meter 1 and energy meter 2 is changed；The arcing quantity of monitoring spectrum analyzer, and carry out printing or carrying out output with the form of DOC report achieving after the test mode of whole system and result being collected.
Technology requires: (1) operating system: win xp, win 7, win 8；(2) internal memory: more than 512M；
System uses modular design to be easy to the upgrading in later stage and daily maintenance；For whole system forms: signal source, spectrum analyzer, energy meter, dual directional coupler, 3dB electric bridge are the design of wideband, therefore can the test of compatible different frequency range different system, and power amplifier and wave filter, duplexer use modular design i.e. only need to change above three module when test is without frequency range, client can realize the product design of customization according to different demands.
System self-maintenance
System can be calibrated voluntarily and safeguard, tests and closes in test process carrying out, and closes road output owing to power amplifier uses multistage amplification, and single channel also exists the problem promoting level overload, the problem that two-way also exists phase matched power match.And native system for signal input and close employing automatically control, double switch time delay be less than 1ms；When signal amplifies and reduces, regulation step-length can set, but sets the bound of step-length: can arbitrarily set between 0.1dB-5dB.
Method of testing is specific as follows:
Owing to " Kelvin effect " impedance variation of radio-frequency (RF) energy transmission will cause the reflection of signal, the variations in temperature of transmission medium all can be converted into heat energy, and power capacity refers to that device is caused aging, the deformation of device and voltage flash phenomenon allowed maximum allowable power load are not occurred by the heat energy of the consumed generation of resistance and dielectric loss.
Passive device power capacity refers to maximal input, need exist to the peak-to-average force ratio (CCDF) of each system is done corresponding analysis, each system is as follows with the lower peak-to-average ratio of configuration:
| Peak-to-average force ratio (%) | Signaling mode |
| 0.01 | GSM |
| 0.16 | EDGE |
| 3.34 | CDMA2000 1 carrier wave |
| 9.7 | CDMA2000 6 carrier wave |
| 12.66 | EVDO 1 carrier wave |
| 10.8 | WCDMA 3 carrier wave |
| 11.94 | Descending 3 time slots of TD-SCDMA |
Test process (as a example by gsm system):
1. add device under test
If measured piece is multiport device, during test, other port unnecessary connects high-power low-intermodulation matched load；
2. send high-power signal to device under test
(1) Frequency Of Signal Generator is set: during single carrier test, the center frequency point of carrier wave is set to 953.6MHz, during 4 carrier test: arranging frequency is 942MHz, 942.6MHz, 953MHz, 953.6MHz；
(2) open computer, allow computer automatically adjust signal power until ingoing power meter 1 reading is for requiring measured power；
(3) spectrum analyzer is set to maxhold pattern；
3., by measured device as in temperature control box, when the temperature of temperature control box arrives 50 DEG C, close temperature control box；
4. follow-on test 10 minutes；
5. result judges
5.1 judge whether have arcing phenomena in receiving frequency range；
In whole power capacity test process, spectrum analyzer showing spuious and wide band noise level value >=-107dBm/100KHz is then judged as arcing, if checking, overall broadband arcing quantity more than 5, then it is determined that arcing；
Arcing phenomena is due to, device power off-capacity, particularly not enough to the ability to bear of peak power, produces abnormal heating, spark phenomenon, thus causes the up end to make an uproar lifting, causes uplink interference.
5.2 judge whether device burns
Then it is judged to burn as deposited any one situation in the following:
(1) in test process, the signal of energy meter 3 reading reduces amplitude and cannot be greater than 3dB, if more than 3dB, burning for device；
(2) other key indexs (such as insertion loss, passband fluctuation, input port reflection intermodulation) of device can be tested after power test completes, require then to be judged to burn as other indexs do not meet relevant criterion；
(3) in whole test process, the standing wave ratio of computer monitoring cannot be greater than 1.5, is judged to burn more than 1.5；
(4) after power capacity has been tested, device inside being carried out visual examination, the sparking vestige if there is macroscopic black is then judged as burning.
Claims (7)
1. a system based on testing passive device power capacity, it is characterised in that including: the computer that is linked in sequence, signal generating unit, 3dB electric bridge, dual directional coupler, duplexer, and the energy meter being connected with dual directional coupler；Described energy meter is connected with computer；Described duplexer is used for connecting part to be measured.
A kind of system based on testing passive device power capacity the most according to claim 1, it is characterised in that described signal generating unit includes two signal generation branch roads；Signal generator that described signal generation branch road includes being linked in sequence, power amplifier, wave filter；Described signal generator is connected with computer；Described wave filter is connected with 3dB electric bridge input.
A kind of system based on testing passive device power capacity the most according to claim 1, it is characterised in that described power is calculated as two.
A kind of system based on testing passive device power capacity the most according to claim 1, it is characterised in that also include the spectrum analyzer being connected with duplexer.
A kind of system based on testing passive device power capacity the most according to claim 1, it is characterised in that described part outfan to be measured is connected with attenuator, attenuator is connected with computer by energy meter 3.
A kind of system based on testing passive device power capacity the most according to claim 1, it is characterised in that described power amplifier is multi-stage power amplifier.
A kind of system based on testing passive device power capacity the most according to claim 1, it is characterised in that described signal generating unit, 3dB electric bridge, dual directional coupler, duplexer, spectrum analyzer and energy meter are placed in and set in air-conditioned rack.
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| CN201620181773.9U CN205566320U (en) | 2016-03-09 | 2016-03-09 | System based on test passive component power capacity |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106546820A (en) * | 2016-11-16 | 2017-03-29 | 中国电子科技集团公司第四十研究所 | A kind of apparatus and method for improving broadband handheld formula spectrum analyzer low frequency power capacity |
| CN110401459A (en) * | 2018-04-24 | 2019-11-01 | 摩比天线技术（深圳）有限公司 | A kind of system for realizing the spuious test of RF switch |
| CN111193555A (en) * | 2019-07-08 | 2020-05-22 | 杭州紫光网络技术有限公司 | Multi-frequency concurrent intermodulation test system |
| CN111355538A (en) * | 2020-03-10 | 2020-06-30 | 焱行科技(上海)有限公司 | Function testing device and method for radio frequency device |
| CN111371511A (en) * | 2020-03-10 | 2020-07-03 | 焱行科技(上海)有限公司 | Device power capacity testing device and method |
-
2016
- 2016-03-09 CN CN201620181773.9U patent/CN205566320U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106546820A (en) * | 2016-11-16 | 2017-03-29 | 中国电子科技集团公司第四十研究所 | A kind of apparatus and method for improving broadband handheld formula spectrum analyzer low frequency power capacity |
| CN110401459A (en) * | 2018-04-24 | 2019-11-01 | 摩比天线技术（深圳）有限公司 | A kind of system for realizing the spuious test of RF switch |
| CN110401459B (en) * | 2018-04-24 | 2021-06-01 | 摩比天线技术（深圳）有限公司 | System for realizing stray test of radio frequency switch |
| CN111193555A (en) * | 2019-07-08 | 2020-05-22 | 杭州紫光网络技术有限公司 | Multi-frequency concurrent intermodulation test system |
| CN111193555B (en) * | 2019-07-08 | 2022-04-15 | 杭州紫光网络技术有限公司 | Multi-frequency concurrent intermodulation test system |
| CN111355538A (en) * | 2020-03-10 | 2020-06-30 | 焱行科技(上海)有限公司 | Function testing device and method for radio frequency device |
| CN111371511A (en) * | 2020-03-10 | 2020-07-03 | 焱行科技(上海)有限公司 | Device power capacity testing device and method |
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