CN202617127U - Multi-signal passive inter-modulation testing equipment and system - Google Patents
Multi-signal passive inter-modulation testing equipment and system Download PDFInfo
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- CN202617127U CN202617127U CN2012201942285U CN201220194228U CN202617127U CN 202617127 U CN202617127 U CN 202617127U CN 2012201942285 U CN2012201942285 U CN 2012201942285U CN 201220194228 U CN201220194228 U CN 201220194228U CN 202617127 U CN202617127 U CN 202617127U
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Abstract
The utility model discloses multi-signal passive inter-modulation testing equipment and a multi-signal passive inter-modulation testing system. The equipment comprises a signal source, a power amplifier, a low inter-modulation combiner, a first low inter-modulation shunt, a second low inter-modulation shunt and frequency analysis, detection and display equipment, wherein the signal source is used for generating multipath signals of different bands; the power amplifier is used for amplifying the power of the multipath signals; the low inter-modulation combiner is used for combining the multipath source signals output after being amplified by the power amplifier and outputting combined signals; the first low inter-modulation shunt is used for separating the source signals and transmitting the inter-modulation signals; the second low inter-modulation shunt is used for separating the source signals and transmitting the inter-modulation product; and the frequency analysis, detection and display equipment is used for testing the inter-modulation signals. An indoor distribution system is built by the power amplifier and the low inter-modulation combiner together to share a multi-system multi-band wireless signal combining scene, so that products of odd order and even order produced by different-band multi-signal mixed inter-modulation can be detected.
Description
[technical field]
The utility model relates to electronic applications, relates in particular to a kind of many signal passives of multisystem intermodulation testing equipment and system.
[background technology]
Along with the development of mobile communication, have the network of 2G and 3G between each operator simultaneously, have the 4G network in the future, each system's frequency range standard has nothing in common with each other, and the even-order intermodulation between system has been disturbed the difficult problem into the puzzlement Joint construction and sharing with the passive intermodulation between multisystem.
In the communication system, when process passive device of the signal more than 2 road or 2 tunnel and inactive component, because the mutual distortion of device; Produce the inter-modulated signal on each rank,, forward direction and back in equipment, occur to two kinds of transmission directions because the transmission direction of intermodulation is a multidimensional; Wherein the intermodulation product of fl transmission is referred to as to transmit intermodulation (Forward; Simplify FWD), the back is referred to as to reflect intermodulation (Reverse simplifies REV) to the intermodulation product of transmission.
As shown in Figure 1, prior art utilizes power amplifier, duplexer and control circuit to realize the extraction and the detection of inter-modulated signal.Signal generator produces triggering signal among Fig. 1, sends to be given among two power amplifier PA1 and the PA2 respectively and amplifies, and through Coupling device extraction signal, is used for the power output of monitor power amplifier PA.Signal after PA1 and PA2 amplify is input in the duplexer (Duplexer) at last through mixer (Combiner).The output of duplexer (Port1) connects equipment under test (DUT), outputs signal to equipment under test.At this moment, the be open to the custom RX end of duplexer of the reflection inter-modulated signal of equipment under test gets into testing circuit, thereby tests out reflection passive intermodulation signal through the close beta point.In addition, the transmission inter-modulated signal of equipment under test gets into testing circuit through the RX end of the Port2 of another duplexer, thereby tests out transmission passive intermodulation signal.
Can find out that from above description existing equipment is subject to the transmit frequency band of duplexer and power amplifier, can test the intermodulation product size of triangular web usually.According to the characteristics of duplexer, this test philosophy and testing equipment are normally tested the odd-order intermodulation product, and like 3 rank intermodulation, 5 rank intermodulation, 7 rank intermodulation etc., triggering signal is 2 the tunnel during test single system.The test frequency is 2F1 ± F2,3F1 ± 2F2 etc.
In order to detect different frequency range and odd even rank intermodulation product, need the contingent multisystem mixing scene of simulation indoor distributed system Joint construction and sharing at present.
[utility model content]
The utility model embodiment provides many signal passives of multisystem intermodulation testing equipment and system, detects not same order intermodulation product of different frequency range.
Many signal passives of multisystem intermodulation testing equipment of the utility model embodiment comprises:
Different frequency range signal source: first signal, the secondary signal that are used to produce different frequency range;
Power amplifier: be used for exporting after first signal, the secondary signal power amplification;
Mixer: be used for that first signal, secondary signal that power amplifier amplifies output are closed behind the road output and close the road signal and give equipment under test;
Splitter: receive inter-modulated signal, and from said inter-modulated signal, isolate transmission inter-modulated signal or reflection inter-modulated signal; Said inter-modulated signal is that the road signal that closes that equipment under test is imported according to mixer produces.
Many signal passives cross modulation test system of the utility model embodiment comprises:
Different frequency range signal source: first signal, the secondary signal that are used to produce different frequency range;
Power amplifier: be used for exporting after first signal, the secondary signal power amplification;
Mixer: be used for that first signal, secondary signal that power amplifier amplifies output are closed behind the road output and close the road signal and give equipment under test;
Splitter: receive inter-modulated signal, and from said inter-modulated signal, isolate transmission inter-modulated signal or reflection inter-modulated signal; Said inter-modulated signal is that the road signal that closes that equipment under test is imported according to mixer produces;
Frequency spectrograph: be used to read out transmission inter-modulated signal or the reflection inter-modulated signal that splitter produces.
The utility model can detect the different odevities rank intermodulation product of the many signals of different frequency range through power amplifier, mixer simulation indoor distributed system Joint construction and sharing multisystem mixing scene.
[description of drawings]
Fig. 1 is the principle schematic of traditional many signal passives cross modulation test system system;
When Fig. 2 is the utility model multisystem signal through equipment under test, the inter-modulated signal principle schematic of generation;
Fig. 3 is the principle schematic of many signal passives of the utility model embodiment intermodulation testing equipment;
Fig. 4 tests the test macro framework sketch map of reflection intermodulation for another embodiment of the utility model;
Fig. 5 tests the test macro framework sketch map of transmission intermodulation at an embodiment for the utility model;
Fig. 6 is many signal passives of the utility model cross modulation test system sketch map.
[embodiment]
Below in conjunction with accompanying drawing and embodiment the utility model is further described:
See also Fig. 2, many signal passives intermodulation testing equipment of the utility model comprises, the power amplifier 112 of different frequency range signal source 110, corresponding different frequency range signal source 110, mixer 106, splitter 114.Wherein.Different frequency range signal source 110 is used to produce first signal and the secondary signal of different frequency range; Power amplifier 112 is used for exporting after first signal and the secondary signal power amplification; Mixer 106 is exported to equipment under test 107 after being used for first signal and secondary signal that power amplifier 112 amplifies input closed the road; Splitter 114 is used to receive inter-modulated signal, and from said inter-modulated signal, isolates transmission inter-modulated signal or reflection inter-modulated signal; Wherein said inter-modulated signal is that the road signal that closes that equipment under test 107 is imported according to mixer 106 produces.Be appreciated that when splitter 114 is arranged between mixer 106 and the equipment under test 107 that splitter 114 is isolated the reflection inter-modulated signal from the inter-modulated signal that equipment under test 107 produces, and from the output of Pn+2 end.When splitter 114 was arranged at equipment under test 107 outputs, splitter 114 was isolated the transmission inter-modulated signal from the inter-modulated signal that equipment under test 107 produces, and from the output of Pn+1 end.
Many signal passives of this patent multisystem intermodulation testing equipment is built into the test platform that can test different frequency range, the input of many signals; Detect under different systems, the different capacity input signal situation; The odevity rank intermodulation product of the many signals of each inactive component multisystem in the mobile communication compartment system, and the intermodulation testing equipment of realizing according to this method of testing.
In conjunction with consulting Fig. 2, Fig. 3, be appreciated that in many signal passives intermodulation testing equipment, can further expand, and different frequency range signal source 110 also is used to produce the 3rd signal of different frequency range; Power amplifier 112 also is used for the 3rd signal is carried out power amplification; Mixer 106 is used for that also first signal, secondary signal, the 3rd signal that power amplifier amplifies input are closed behind the road output and closes the road signal and give equipment under test; Splitter 114 also is used to receive first signal, secondary signal, the 3rd signal amplifies and close the road after export close the road signal, and from said inter-modulated signal, isolate transmission inter-modulated signal or reflection inter-modulated signal.And different frequency range signal source 110 can be used to produce different frequency range first signal, secondary signal ... n-signal.Power amplifier 112 be used for first signal, secondary signal ... n-signal carries out power amplification respectively.Mixer 106 be used for power amplifier amplify input first signal, secondary signal ... n-signal is exported to equipment under test after closing the road.Preferably, mixer 106 adopts the low intermodulation mixer with respect to the inter-modulated signal of equipment under test output among the utility model embodiment, and this low intermodulation is for the inter-modulated signal of equipment under test output.Splitter is used to receive inter-modulated signal, and from said inter-modulated signal, isolates transmission inter-modulated signal or reflection inter-modulated signal; Said inter-modulated signal is that the road signal that closes that equipment under test is imported according to mixer produces.
And then at first test exportable inter-modulated signal band limits and calculate and fall into all odd and even number rank intermodulation products that existing intermodulation appearance 3,5,7 each odd-order intermodulation product detect frequency ranges according to existing intermodulation appearance; Confirm each the rank intermodulation product that can detect, and selected input signal frequency with confirm to fall into the intermodulation frequencies at different levels that can detect frequency range.
Suppose to participate in intermodulation N signal and first signal, secondary signal ... the frequency of n-signal is used f respectively
1, f
2..., f
NCorresponding expression.
Each rank intermodulation product frequency f then
IMFor:
(f
IM＞0)
Wherein: n
iBe the zero-sum positive integer.
Become the intermodulation of X rank:
Like 2 rank intermodulation be: 2f, f
1± f
2
3 rank are: 3f, 2f
1± f
2, f
1± f
2± f
3
4 rank are: 3f
1± f
2, 2f
1± 2f
2, 2f
1± f
2± f
3, f
1-2f
2-f
3
5 rank are: 4f
1± f
2, 3f
1± 2f
2, 2f
1± 2f
2± f
3, f
1-2f
2-2f
3, f
1-3f
2-f
3, 2f
1± f
2± f
3± f
4, f
1-2f
2-f
3-f
4, f
1± f
2± f
3± f
4± f
5
Wherein f representes f
1=f
2=f
3=...=f
XThe time X rank intermodulation value.
Utilize test platform as shown in Figure 2, the signal source of each frequency range is an example with the intermodulation testing appearance, and power output can be simulated the signal of each communication system, such as:
CDMA800 intermodulation testing appearance can be simulated the power signal of CDMA800;
GSM900 intermodulation testing appearance can be simulated the power signal of GSM900;
DCS1800 intermodulation testing appearance can analog D CS1800 power signal;
TD intermodulation testing appearance can be simulated the power signal of TD-SCDMA;
3G FDD intermodulation testing appearance can be simulated the power signal of WCDMA and CDMA2000.
When one or more multisystem signal during through equipment under test (including but not limited to various inactive components), can produce inter-modulated signal (referring to Fig. 3), this inter-modulated signal comprises transmission inter-modulated signal or reflection inter-modulated signal
See also Fig. 4; The different frequency range signal source is integrated in the intermodulation appearance with corresponding amplifier in the present embodiment; The multisystem signal utilizes the reflection of intermodulation appearance (101,102,103) self and test transmission function to receive this inter-modulated signal through equipment under test; And utilize intermodulation appearance reading to read this value, thus test out the intermodulation product magnitude of the many signals of multisystem, comprise even-order.Wherein, the output port of intermodulation appearance 101 produces the signal of 1 system, and the output port of intermodulation appearance 102 produces the signal of 2 systems, and the output port of intermodulation appearance 103 produces the signal of n system, and n is the non-zero natural number.And then transmitting of each intermodulation appearance be input in the low intermodulation multiplefrequency mixer 106 through port P1, P2, Pn, and each system signal that closes behind the road can be simulated multisystem communication standard Joint construction and sharing situation.Be appreciated that here the intermodulation appearance can expand a plurality ofly, also corresponding a plurality of and each system signal of its port is to mixer.Mixer 106 exports equipment under test 107 to, and equipment under test 107 will produce inter-modulated signal.Wherein, as shown in Figure 4, splitter 114 can use filter or multifrequency duplexer of the prior art to replace.Splitter 114 is arranged at mixer 106 and equipment under test 107 receives between the path, and then mixer 106 outputs are closed the road signal to behind the equipment under test 107, isolate the transmission inter-modulated signal from the inter-modulated signal that equipment under test 107 produces through splitter 114, and pass through P
N+1End output.The transmission intermodulation testing path of please consulting forward direction shown in Figure 5 in the lump carries out.Splitter 114 is arranged on the equipment under test 107 output/outputs, and then splitter 114 closes the road signal through TX end input, and from the inter-modulated signal that equipment under test 107 produces, isolates the reflection inter-modulated signal through the RX end, and passes through P
N+2Port output.Be appreciated that; In conjunction with Fig. 4 and Fig. 5; Many signal passives intermodulation testing equipment can combine in the lump; Connect Pn+1 or Pn+2 port through the test cable, test transmission or reflection intermodulation respectively, the read value that finally transmits intermodulation and/or reflection intermodulation shows through the display interface 108 of native system.
Optional, also be connected in series into isolator 104 between the output port of intermodulation appearance 101 and mixer 106 inputs among Fig. 4 or Fig. 5.Isolator 104 is used to isolate reflected signal, protection intermodulation appearance instrument.Optional, also each meets load L1 respectively to isolator 104, and this load L1 uses to absorbing the signal that isolator 104 and/or filter 109 are isolated.
The frequency that can fall into according to inter-modulated signal is read in the reception of inter-modulated signal, selects corresponding intermodulation appearance to receive, and wherein intermodulation appearance 101 receives the inter-modulated signal of 1 system, and intermodulation appearance 103 receives the inter-modulated signal of n systems.
Illustrate: utilize GSM900, WCDMA and the intermodulation of CDMA2000 intermodulation appearance testing of equipment multisystem.According to calculating, when mobile GSM900, the GSM900 of UNICOM, WCDMA and CDMA2000 multisystem were built together, its 4 rank intermodulation meeting fell into the reception frequency range of DCS1800, causes interference.
Then this moment, the intermodulation appearance 101 was chosen GSM900 intermodulation appearance, and intermodulation appearance 102 is selected WCDMA intermodulation appearance, and intermodulation appearance 103 is chosen the intermodulation appearance of other system according to test needs, and native system also need increase DCS1800 intermodulation appearance in testing.
Each intermodulation appearance produces signal, closes after the road exports equipment under test to through mixer 106, produces intermodulation, after being received by DCS1800 intermodulation appearance, shows reading, and the tester has tested out 4 rank inter-modulated signal of above-mentioned 4 systems according to the reading of this frequency spectrograph.
See also Fig. 6, disclose a kind of many signal passives cross modulation test system in the present embodiment, comprise the power amplifier 112 of different frequency range signal source 110, corresponding different frequency range signal source 110, mixer 106, splitter 114 and frequency spectrograph 116.Wherein.Different frequency range signal source 110 is used to produce the signal of different frequency range; Power amplifier 112 is used for exporting after the power amplification with signal; Mixer 106 is exported to equipment under test 107 after being used for the multiple signals that power amplifier 112 amplifies input are closed the road; Splitter 114 is used to receive inter-modulated signal, and from said inter-modulated signal, isolates transmission inter-modulated signal or reflection inter-modulated signal; Wherein said inter-modulated signal is that the road signal that closes that equipment under test 107 is imported according to mixer 106 produces; Frequency spectrograph 116 is used to read out transmission inter-modulated signal or the reflection inter-modulated signal that splitter produces.
Many signal passives cross modulation test system utilizes signal source 110 to produce the frequency band signals of each system, transfers to power amplifier, utilizes the signal in power amplifier 112 amplifying signal sources 110, and inputs in the low intermodulation mixer 106.Mixer 106 outputs signal to equipment under test 107.Equipment under test produces inter-modulated signal in 107; Utilize mixer 114 to separate and remove transmission and reflection inter-modulated signal; Wherein as shown in Figure 6; The mixer 114 that accompanying drawing top test product 107 outputs connect is isolated the transmission inter-modulated signal, and the mixer 114 that following test product 107 inputs of accompanying drawing connect is isolated the reflection inter-modulated signal, receives and reads through frequency spectrograph 116.
In testing with respect to prior art 2 tunnel triggering signals, be generally 2 * 43dBm, test platform in this patent utility model and instrument can be used the triggering signal more than 2 tunnel and 2 tunnel according to the actual measurement needs.Compared with prior art, the test platform that provides of many signal passives of present embodiment cross modulation test system has great test advantage; Break through the limitation that tradition can only be tested individual system, can test the intermodulation testing that any multisystem is built together to be needed; Broken through tradition and can only test the odd-order intermodulation testing, tradition can only be tested 3 rank, distinctly can be tested 5 rank and 7 rank, and method of testing of the utility model and instrumentation can be tested the intermodulation product of any exponent number.
In many signal passives of the utility model intermodulation testing equipment and the system through closing the signal of handling different frequency range in the road, the test platform that can support many signals inputs; And then detecting under different systems, the different capacity input signal situation; Realize in the mobile communication compartment system under the many signal conditionings of each inactive component of test not same order mixings intermodulation product, and according to the intermodulation testing equipment of this method of testing realization.
This shows; The utility model provides multisystem, many signal passives intermodulation testing equipment and system; And the plurality of optional adaptation scheme is provided, above embodiment and the described technical scheme of unrestricted the utility model, therefore; Although this specification is illustrated the utility model with reference to each above-mentioned embodiment; The related personnel of this area should be appreciated that the spirit that all do not break away from the utility model and the technical scheme and the improvement thereof of scope, and it all should be encompassed in the middle of the claim scope of the utility model.
Claims (8)
1. the equipment of signal passive intermodulation testing more than a kind is characterized in that comprising:
Different frequency range signal source: first signal and the secondary signal that are used to produce different frequency range;
Power amplifier: be used for first signal and secondary signal are carried out power amplification respectively;
Mixer: output is closed the road signal to equipment under test after being used for first signal that power amplifier amplifies input closed the road with secondary signal;
Splitter: receive inter-modulated signal, and from said inter-modulated signal, isolate transmission inter-modulated signal or reflection inter-modulated signal; Said inter-modulated signal is that the road signal that closes that equipment under test is imported according to mixer produces.
2. many signal passives intermodulation testing equipment according to claim 1; It is characterized in that: the different frequency range signal source is made up of a plurality of intermodulation appearance, and each intermodulation appearance is used to export the signal of different frequency range and the inter-modulated signal that produces according to equipment under test reads out equipment under test intermodulation value.
3. many signal passives intermodulation testing equipment according to claim 2 is characterized in that: also be connected in series into isolator between the output port of each intermodulation appearance and the mixer input and be used to isolate reflected signal.
4. many signal passives intermodulation testing equipment according to claim 3, it is characterized in that: isolator connects load, and said load is used to absorb the signal that isolator is isolated.
5. many signal passives intermodulation testing equipment according to claim 1 is characterized in that: the different frequency range signal source: the 3rd signal that also is used to produce different frequency range;
Power amplifier: also be used for the 3rd signal is carried out power amplification;
Mixer: be used for that also first signal, secondary signal, the 3rd signal that power amplifier amplifies input are closed behind the road output and close the road signal and give equipment under test;
Splitter: that exports after also being used to receive first signal, secondary signal, the 3rd signal amplifies and closing the road closes the road signal, and from said inter-modulated signal, isolates transmission inter-modulated signal or reflection inter-modulated signal.
6. signal passive cross modulation test system more than a kind is characterized in that, comprising:
Different frequency range signal source: first signal and the secondary signal that are used to produce different frequency range;
Power amplifier: be used for exporting after first signal and the secondary signal power amplification;
Mixer: output is closed the road signal to equipment under test after being used for first signal that power amplifier amplifies input closed the road with secondary signal;
Splitter: receive inter-modulated signal, and from said inter-modulated signal, isolate transmission inter-modulated signal or reflection inter-modulated signal; Said inter-modulated signal is that the road signal that closes that equipment under test is imported according to mixer produces;
Frequency spectrograph: be used to read out transmission inter-modulated signal or the reflection inter-modulated signal that splitter produces.
7. many signal passives cross modulation test system according to claim 6; It is characterized in that: the different frequency range signal source is made up of a plurality of intermodulation appearance, and each intermodulation appearance is used to export the signal of different frequency range and the inter-modulated signal that produces according to equipment under test reads out equipment under test intermodulation value.
8. many signal passives cross modulation test system according to claim 7 is characterized in that: also be connected in series into isolator between the output port of each intermodulation appearance and the mixer input and be used to isolate reflected signal.
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| CN2012201942285U CN202617127U (en) | 2012-04-28 | 2012-04-28 | Multi-signal passive inter-modulation testing equipment and system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103346851A (en) * | 2013-07-19 | 2013-10-09 | 武汉虹信通信技术有限责任公司 | Multi-system high-integration multi-level intermodulation test system |
| CN103543427A (en) * | 2013-10-28 | 2014-01-29 | 中国电子科技集团公司第四十一研究所 | Method and device for calibrating passive intermodulation testing system based on intelligent search algorithm |
| CN103944594A (en) * | 2014-05-05 | 2014-07-23 | 浙江大学 | Initial phase control based passive inter modulation occurrence point positioning method and system thereof |
| CN107769869A (en) * | 2016-08-18 | 2018-03-06 | 京信通信系统（中国）有限公司 | Multi-signal passive intermodulation test system |
| CN108107345A (en) * | 2017-12-12 | 2018-06-01 | 广州兴森快捷电路科技有限公司 | Passive cross modulation test device |
| CN113676241A (en) * | 2021-07-05 | 2021-11-19 | 中国人民解放军国防科技大学 | Multi-frequency outbound signal power amplification method and system of Beidou short message system |
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2012
- 2012-04-28 CN CN2012201942285U patent/CN202617127U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103346851A (en) * | 2013-07-19 | 2013-10-09 | 武汉虹信通信技术有限责任公司 | Multi-system high-integration multi-level intermodulation test system |
| CN103346851B (en) * | 2013-07-19 | 2015-04-01 | 武汉虹信通信技术有限责任公司 | Multi-system high-integration multi-level intermodulation test system |
| CN103543427A (en) * | 2013-10-28 | 2014-01-29 | 中国电子科技集团公司第四十一研究所 | Method and device for calibrating passive intermodulation testing system based on intelligent search algorithm |
| CN103543427B (en) * | 2013-10-28 | 2016-05-25 | 中国电子科技集团公司第四十一研究所 | Passive cross modulation test system calibration steps and device based on intelligent search algorithm |
| CN103944594A (en) * | 2014-05-05 | 2014-07-23 | 浙江大学 | Initial phase control based passive inter modulation occurrence point positioning method and system thereof |
| CN103944594B (en) * | 2014-05-05 | 2016-03-30 | 浙江大学 | Based on localization method and the system thereof of the passive intermodulation origination point of initial phase control |
| CN107769869A (en) * | 2016-08-18 | 2018-03-06 | 京信通信系统（中国）有限公司 | Multi-signal passive intermodulation test system |
| CN108107345A (en) * | 2017-12-12 | 2018-06-01 | 广州兴森快捷电路科技有限公司 | Passive cross modulation test device |
| CN113676241A (en) * | 2021-07-05 | 2021-11-19 | 中国人民解放军国防科技大学 | Multi-frequency outbound signal power amplification method and system of Beidou short message system |
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