CN103227687A - Passive multi-step intermodulation tester - Google Patents
Passive multi-step intermodulation tester Download PDFInfo
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- CN103227687A CN103227687A CN2013101173094A CN201310117309A CN103227687A CN 103227687 A CN103227687 A CN 103227687A CN 2013101173094 A CN2013101173094 A CN 2013101173094A CN 201310117309 A CN201310117309 A CN 201310117309A CN 103227687 A CN103227687 A CN 103227687A
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- intermodulation
- duplexer
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Abstract
The invention discloses a passive multi-step intermodulation tester which comprises two signal sources 101 and 102, two power amplifiers 201 and 202, two couplers 301 and 302, two AD (analog to digital) sampling modules 111 and 112, two isolators 401 and 402, a 3dB bridge 501, two loads 601 and 602, two low-intermodulation diplexers 701 and 702, a radio frequency switch 801 and a digital receiver module 901. The designed passive multi-step intermodulation tester can meet passive intermodulation testing of frequency ranges of various frequency bands of mobile communication.
Description
Technical field
The present invention relates to the field tests of the intermodulation product of passive device.
Background technology
" passive multistage intermodulation testing instrument " is that a kind of inter-modulated signal of precision is measured special equipment, is used for detecting " Intermodulation Interference " noise of the widely used passive device of mobile communications network.Along with the continuous expansion of China's mobile communications network and the rapid increase of transmitted data amount, requirement for mobile communication product " Intermodulation Interference " noise is also more and more higher, and the passive intermodulation comprehensive tester has become the indispensable detecting instrument that the production test of passive device production firm is used.
As shown in Figure 1, passive cross modulation test instrument in the market only is suitable for narrowband test, is not suitable for the demand after the mobile communication frequency range is widened, and therefore can't comprehensively measure the passive device index.
Summary of the invention
Technical problem to be solved by this invention is to overcome the deficiencies in the prior art, and a kind of passive multistage intermodulation testing instrument that can satisfy each band frequency scope passive cross modulation test of mobile communication is provided.
The present invention specifically solves the problems of the technologies described above by the following technical solutions: the present invention has designed a kind of passive multistage intermodulation testing instrument, comprise two signal sources 101,102, two power amplifiers 201,202, two couplers 301,302, two AD sampling modules 111,112, two isolators 401,402,3dB electric bridge 501, two loads 601,602, two low intermodulation duplexers 701,702, radio-frequency (RF) switch 801 and digital receiver modules 901, wherein:
The output in described first signal source 101 and secondary signal source 102 is connected in series the input of first power amplifier 201 and second power amplifier 202 respectively;
The output of described first power amplifier 201 and second power amplifier 202 is connected the input of first coupler 301 and second coupler 302 respectively, the output of described first coupler 301 and second coupler 302 is connected in series the input of first isolator 401 and second isolator 402 respectively, described first isolator 401 and the output of second isolator 402 are connected the input of 3dB electric bridge 501 jointly, and the coupled end of described first, second coupler connects the input of first, second AD sampling module respectively;
Signal after first power amplifier 201 will amplify transfers to 3dB electric bridge 501 by first coupler 301 and first isolator 401 successively, signal after second power amplifier 202 will amplify transfers to 3dB electric bridge 501 by second coupler 302 and second isolator 402 successively, 111 pairs first coupler 301 signal after coupling of a described AD sampling module are sampled, and 112 pairs second coupler 302 signal after coupling of described the 2nd AD sampling module are sampled;
The output of described 3dB electric bridge 501 connects the input of first load 601 and the transmitting terminal of the first low intermodulation duplexer 701 respectively, the test lead of the described first low intermodulation duplexer 701 connects the intermodulation reflection measurement end of passive measured device, described 3dB electric bridge 501 carries out the synthetic processing of power with the two paths of signals that receives, and the signal after will synthesizing transfers to the first low intermodulation duplexer 701, and the described first low intermodulation duplexer 701 transfers to passive measured device with the composite signal that receives as test signal;
The intermodulation reflection transmission ends of described passive measured device connects the test lead of the second low intermodulation duplexer 702, the transmitting terminal of the described second low intermodulation duplexer 702 connects the input of second load 602, above-mentioned test signal part behind passive measured device reflects the test lead that transmission ends transfers to the second low intermodulation duplexer 702 along the intermodulation of passive measured device, and is absorbed by second load 602 through the transmitting terminal of the second low intermodulation duplexer 702; Another part test signal reflexes to the receiving terminal of first, second low intermodulation duplexer respectively along the test lead of first, second low intermodulation duplexer, form the emission intermodulation product;
The receiving terminal of the described first low intermodulation duplexer 701 connects the NC end of radio-frequency (RF) switch 801, and the receiving terminal of the second low intermodulation duplexer 702 connects the NO end of radio-frequency (RF) switch 801, and the output of described radio-frequency (RF) switch 801 connects the input of digital receiver module 901; Above-mentioned emission intermodulation product transfers to the NC end and the NO end of radio-frequency (RF) switch 801 respectively through the test lead of first, second low intermodulation duplexer, and transferring to digital receiver module 901 via radio-frequency (RF) switch 801, the emission intermodulation product that 901 pairs of described digital receiver modules receive carries out analytical sampling to be handled.
The present invention compared with prior art has following advantage:
1, modularized design, highly integrated, volume is little;
2, wideband synthetic technology can be measured intermodulation product multistage time;
3, power, frequency can be established flexible operation.
Description of drawings
Fig. 1 is the test philosophy figure of passive third order intermodulation tester of the prior art;
Fig. 2 is the test philosophy figure of the designed passive multistage intermodulation testing instrument of the present invention.
The 1-signal amplification unit, the 2-power detecting unit, 3-power synthesis unit, 4-hangs down intermodulation passive module unit, and 5-receives processing unit.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing:
As shown in Figure 1, the present invention has designed a kind of passive multistage intermodulation testing instrument, comprise two signal sources 101,102, two power amplifiers 201,202, two couplers 301,302, two AD sampling modules 111,112, two isolators 401,402,3dB electric bridge 501, two loads 601,602, two low intermodulation duplexers 701,702, radio-frequency (RF) switch 801 and digital receiver module 901, wherein:
The output in described first signal source 101 and secondary signal source 102 is connected in series the input of first power amplifier 201 and second power amplifier 202 respectively;
In specific embodiment, two signal sources 101,102 and two amplifiers 201,202 constitute signal amplification unit 1, two couplers 301,302, two AD sampling modules 111,112 and two isolators 401,402 constitute power detecting unit 2, the 3dB electric bridge 501 and first load 601 constitute power synthesis unit 3, two the low intermodulation duplexers 701,702 and second load 602 constitute low intermodulation passive module unit 4, and radio-frequency (RF) switch 801 and digital receiver module 901 constitute and receive processing units 5.
The output of described first power amplifier 201 and second power amplifier 202 is connected the input of first coupler 301 and second coupler 302 respectively, the output of described first coupler 301 and second coupler 302 is connected in series the input of first isolator 401 and second isolator 402 respectively, described first isolator 401 and the output of second isolator 402 are connected the input of 3dB electric bridge 501 jointly, and the coupled end of described first, second coupler connects the input of first, second AD sampling module respectively;
Signal after first power amplifier 201 will amplify transfers to 3dB electric bridge 501 by first coupler 301 and first isolator 401 successively, signal after second power amplifier 202 will amplify transfers to 3dB electric bridge 501 by second coupler 302 and second isolator 402 successively, 111 pairs first coupler 301 signal after coupling of a described AD sampling module are sampled, and 112 pairs second coupler 302 signal after coupling of described the 2nd AD sampling module are sampled;
The output of described 3dB electric bridge 501 connects the input of first load 601 and the transmitting terminal of the first low intermodulation duplexer 701 respectively, the test lead of the described first low intermodulation duplexer 701 connects the intermodulation reflection measurement end of passive measured device, be PORT1, described 3dB electric bridge 501 carries out the synthetic processing of power with the two paths of signals that receives, and the signal after will synthesizing transfers to the first low intermodulation duplexer 701, and the described first low intermodulation duplexer 701 transfers to passive measured device with the composite signal that receives as test signal;
The intermodulation reflection transmission ends of described passive measured device, it is the test lead that the PORT2 end connects the second low intermodulation duplexer 702, the transmitting terminal of the described second low intermodulation duplexer 702 connects the input of second load 602, above-mentioned test signal part behind passive measured device reflects the test lead that transmission ends transfers to the second low intermodulation duplexer 702 along the intermodulation of passive measured device, and is absorbed by second load 602 through the transmitting terminal of the second low intermodulation duplexer 702; Another part test signal reflexes to the receiving terminal of first, second low intermodulation duplexer respectively along the test lead of first, second low intermodulation duplexer, form the emission intermodulation product.
The receiving terminal of the described first low intermodulation duplexer 701 connects the NC end of radio-frequency (RF) switch 801, and the receiving terminal of the second low intermodulation duplexer 702 connects the NO end of radio-frequency (RF) switch 801, and the output of described radio-frequency (RF) switch 801 connects the input of digital receiver module 901; Above-mentioned emission intermodulation product transfers to the NC end and the NO end of radio-frequency (RF) switch 801 respectively through the test lead of first, second low intermodulation duplexer, and transferring to digital receiver module 901 via radio-frequency (RF) switch 801, the emission intermodulation product that 901 pairs of described digital receiver modules receive carries out analytical sampling to be handled.
Claims (1)
1. passive multistage intermodulation testing instrument, it is characterized in that, comprise two signal sources (101,102), two power amplifiers (201,202), two couplers (301,302), two AD sampling modules (111,112), two isolators (401,402), 3dB electric bridge (501), two loads (601,602), two low intermodulation duplexers (701,702), radio-frequency (RF) switch (801) and digital receiver module (901), wherein:
The output of described first signal source (101) and secondary signal source (102) is connected in series the input of first power amplifier (201) and second power amplifier (202) respectively;
Described first power amplifier (201) and the output of second power amplifier (202) are connected the input of first coupler (301) and second coupler (302) respectively, the output of described first coupler (301) and second coupler (302) is connected in series the input of first isolator (401) and second isolator (402) respectively, described first isolator (401) and the output of second isolator (402) are connected the input of 3dB electric bridge (501), described first jointly, the coupled end of second coupler connects first respectively, the input of the 2nd AD sampling module;
Signal after first power amplifier (201) will amplify transfers to 3dB electric bridge (501) by first coupler (301) and first isolator (401) successively, signal after second power amplifier (202) will amplify transfers to 3dB electric bridge (501) by second coupler (302) and second isolator (402) successively, a described AD sampling module (111) is sampled to first coupler (301) signal after coupling, and described the 2nd AD sampling module (112) is sampled to second coupler (302) signal after coupling;
The output of described 3dB electric bridge (501) connects the input of first load (601) and the transmitting terminal of the first low intermodulation duplexer (701) respectively, the test lead of the described first low intermodulation duplexer (701) connects the intermodulation reflection measurement end of passive measured device, described 3dB electric bridge (501) carries out the synthetic processing of power with the two paths of signals that receives, and the signal after will synthesizing transfers to the first low intermodulation duplexer (701), and the described first low intermodulation duplexer (701) transfers to passive measured device with the composite signal that receives as test signal;
The intermodulation reflection transmission ends of described passive measured device connects the test lead of the second low intermodulation duplexer (702), the transmitting terminal of the described second low intermodulation duplexer (702) connects the input of second load (602), above-mentioned test signal part behind passive measured device reflects the test lead that transmission ends transfers to the second low intermodulation duplexer (702) along the intermodulation of passive measured device, and is absorbed by second load (602) through the transmitting terminal of the second low intermodulation duplexer (702); Another part test signal reflexes to the receiving terminal of first, second low intermodulation duplexer respectively along the test lead of first, second low intermodulation duplexer, form the emission intermodulation product;
The receiving terminal of the described first low intermodulation duplexer (701) connects the NC end of radio-frequency (RF) switch (801), the receiving terminal of the second low intermodulation duplexer (702) connects the NO end of radio-frequency (RF) switch (801), and the output of described radio-frequency (RF) switch (801) connects the input of digital receiver module (901); Above-mentioned emission intermodulation product transfers to the NC end and the NO end of radio-frequency (RF) switch (801) respectively through the test lead of first, second low intermodulation duplexer, and transferring to digital receiver module (901) via radio-frequency (RF) switch (801), described digital receiver module (901) is carried out analytical sampling to the emission intermodulation product that receives and is handled.
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| CN2013101173094A CN103227687A (en) | 2013-04-07 | 2013-04-07 | Passive multi-step intermodulation tester |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104301049A (en) * | 2014-10-16 | 2015-01-21 | 国家电网公司 | Dual-channel passive device power tolerance testing system |
| CN104880621A (en) * | 2015-04-18 | 2015-09-02 | 南京纳特通信电子有限公司 | Self calibration passive intermodulation tester |
| CN104993883A (en) * | 2015-05-25 | 2015-10-21 | 陶长英 | Passive intermodulation rapid test device of dual-polarization antenna |
| CN105099586A (en) * | 2015-09-11 | 2015-11-25 | 中国电子科技集团公司第四十一研究所 | Passive isolator intermodulation test device based on chamber filtering and method |
| 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 |
| 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 |
| CN114070435A (en) * | 2020-08-03 | 2022-02-18 | 诺基亚通信公司 | PIM elimination |
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| CN102025432A (en) * | 2010-12-17 | 2011-04-20 | 镇江市澳华测控技术有限公司 | Forward and reverse passive inter-modulation (PIM) testing device and method for isolator |
| CN102664695A (en) * | 2012-05-08 | 2012-09-12 | 中国联合网络通信有限公司广东省分公司 | Multi-signal passive intermodulation test equipment |
| CN203278844U (en) * | 2013-04-07 | 2013-11-06 | 南京纳特通信电子有限公司 | Passive multi-order intermodulation tester |
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2013
- 2013-04-07 CN CN2013101173094A patent/CN103227687A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102025432A (en) * | 2010-12-17 | 2011-04-20 | 镇江市澳华测控技术有限公司 | Forward and reverse passive inter-modulation (PIM) testing device and method for isolator |
| CN102664695A (en) * | 2012-05-08 | 2012-09-12 | 中国联合网络通信有限公司广东省分公司 | Multi-signal passive intermodulation test equipment |
| CN203278844U (en) * | 2013-04-07 | 2013-11-06 | 南京纳特通信电子有限公司 | Passive multi-order intermodulation tester |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104301049A (en) * | 2014-10-16 | 2015-01-21 | 国家电网公司 | Dual-channel passive device power tolerance testing system |
| CN104880621A (en) * | 2015-04-18 | 2015-09-02 | 南京纳特通信电子有限公司 | Self calibration passive intermodulation tester |
| CN104880621B (en) * | 2015-04-18 | 2018-06-05 | 南京纳特通信电子有限公司 | Self calibration passive cross modulation test instrument |
| CN104993883A (en) * | 2015-05-25 | 2015-10-21 | 陶长英 | Passive intermodulation rapid test device of dual-polarization antenna |
| CN105099586A (en) * | 2015-09-11 | 2015-11-25 | 中国电子科技集团公司第四十一研究所 | Passive isolator intermodulation test device based on chamber filtering and method |
| CN105099586B (en) * | 2015-09-11 | 2017-11-21 | 中国电子科技集团公司第四十一研究所 | A kind of isolator passive cross modulation test device and method based on cavity filtering |
| 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 |
| 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 |
| CN114070435A (en) * | 2020-08-03 | 2022-02-18 | 诺基亚通信公司 | PIM elimination |
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Application publication date: 20130731 |