CN203278844U - Passive multi-order intermodulation tester - Google Patents
Passive multi-order intermodulation tester Download PDFInfo
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- CN203278844U CN203278844U CN2013201683302U CN201320168330U CN203278844U CN 203278844 U CN203278844 U CN 203278844U CN 2013201683302 U CN2013201683302 U CN 2013201683302U CN 201320168330 U CN201320168330 U CN 201320168330U CN 203278844 U CN203278844 U CN 203278844U
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Abstract
The utility model discloses a passive multi-order intermodulation tester. The passive multi-order intermodulation tester comprises two signal sources (101, 102), two power amplifiers (201, 202), two couplers (301, 302), two AD sampling modules (111, 112), two isolators (401, 402), a 3dB bridge (501), two loads (601, 602), two low intermodulation diplexers (701, 702), a radio frequency switch (801) and a digital receiver module (901). The passive multi-order intermodulation tester provided by the utility model can carry out passive intermodulation tests in each frequency band frequency range in mobile communication.
Description
Technical field
The utility model 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, for detection of " Intermodulation Interference " noise of widely used passive device in 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 is only suitable in 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.
The utility model content
Technical problem to be solved in the utility model 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 utility model specifically solves the problems of the technologies described above by the following technical solutions: the utility model 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 inter-modulation 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 respectively the input of the first power amplifier 201 and the second power amplifier 202;
Described the first power amplifier 201 be connected the output of power amplifier 202 and connect respectively the input of the first coupler 301 and the second coupler 302, the output of described the first coupler 301 and the second coupler 302 is connected in series respectively the input of the first isolator 401 and the second isolator 402, described the first isolator 401 be connected the output of isolator 402 and jointly connect the input of 3dB electric bridge 501, the coupled end of described first, second coupler connects respectively the input of first, second AD sampling module;
Signal after the first power amplifier 201 will amplify transfers to 3dB electric bridge 501 by the first coupler 301 and the first isolator 401 successively, signal after the second power amplifier 202 will amplify transfers to 3dB electric bridge 501 by the second coupler 302 and the second isolator 402 successively, signal after 111 pairs of the first coupler 301 couplings of a described AD sampling module is sampled, and the signal after 112 pairs of the second coupler 302 couplings of described the 2nd AD sampling module is sampled;
The output of described 3dB electric bridge 501 connects respectively the input of the first load 601 and the transmitting terminal of the first low inter-modulation duplexer 701, the intermodulation reflection measurement end of the test lead connected with passive measured device of the described first low inter-modulation duplexer 701, described 3dB electric bridge 501 carries out the synthetic processing of power with the two paths of signals that receives, and the signal after synthesizing transfers to the first low inter-modulation duplexer 701, and the described first low inter-modulation 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 inter-modulation duplexer 702, the transmitting terminal of the described second low inter-modulation duplexer 702 connects the input of the second load 602, above-mentioned test signal transfers to the test lead of the second low inter-modulation duplexer 702 along the intermodulation reflection transmission ends of passive measured device through passive measured device rear portion, and absorbed by the second load 602 through the transmitting terminal of the second low inter-modulation duplexer 702; Another part test signal reflexes to respectively the receiving terminal of first, second low inter-modulation duplexer along the test lead of first, second low inter-modulation duplexer, form the emission intermodulation product;
The receiving terminal of the described first low inter-modulation duplexer 701 connects the NC end of radio-frequency (RF) switch 801, and the receiving terminal of the second low inter-modulation 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 respectively NC end and the NO end of radio-frequency (RF) switch 801 through the test lead of first, second low inter-modulation 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 processed.
The utility model 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 utility model.
The 1-signal amplification unit, 2-power detecting unit, 3-power synthesis unit, the low intermodulation passive module of 4-unit, 5-reception ﹠ disposal unit.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
As shown in Figure 1, the utility model 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 inter-modulation 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 respectively the input of the first power amplifier 201 and the second power amplifier 202;
In specific embodiment, two signal sources 101,102 and two power amplifiers 201,202 consist of signal amplification unit 1, two couplers 301,302, two AD sampling modules 111,112 and two isolators 401,402 consist of power detecting unit 2,3dB electric bridge 501 and the first load 601 consist of power synthesis unit 3, two low inter-modulation duplexers 701,702 and the second load 602 consist of low intermodulation passive module unit 4, and radio-frequency (RF) switch 801 and digital receiver module 901 consist of reception ﹠ disposal unit 5;
Described the first power amplifier 201 be connected the output of power amplifier 202 and connect respectively the input of the first coupler 301 and the second coupler 302, the output of described the first coupler 301 and the second coupler 302 is connected in series respectively the input of the first isolator 401 and the second isolator 402, described the first isolator 401 be connected the output of isolator 402 and jointly connect the input of 3dB electric bridge 501, the coupled end of described first, second coupler connects respectively the input of first, second AD sampling module;
Signal after the first power amplifier 201 will amplify transfers to 3dB electric bridge 501 by the first coupler 301 and the first isolator 401 successively, signal after the second power amplifier 202 will amplify transfers to 3dB electric bridge 501 by the second coupler 302 and the second isolator 402 successively, signal after 111 pairs of the first coupler 301 couplings of a described AD sampling module is sampled, and the signal after 112 pairs of the second coupler 302 couplings of described the 2nd AD sampling module is sampled;
The output of described 3dB electric bridge 501 connects respectively the input of the first load 601 and the transmitting terminal of the first low inter-modulation duplexer 701, the intermodulation reflection measurement end of the test lead connected with passive measured device of the described first low inter-modulation duplexer 701, 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 synthesizing transfers to the first low inter-modulation duplexer 701, and the described first low inter-modulation 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 inter-modulation duplexer 702, the transmitting terminal of the described second low inter-modulation duplexer 702 connects the input of the second load 602, above-mentioned test signal transfers to the test lead of the second low inter-modulation duplexer 702 along the intermodulation reflection transmission ends of passive measured device through passive measured device rear portion, and absorbed by the second load 602 through the transmitting terminal of the second low inter-modulation duplexer 702; Another part test signal reflexes to respectively the receiving terminal of first, second low inter-modulation duplexer along the test lead of first, second low inter-modulation duplexer, form the emission intermodulation product;
The receiving terminal of the described first low inter-modulation duplexer 701 connects the NC end of radio-frequency (RF) switch 801, and the receiving terminal of the second low inter-modulation 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 respectively NC end and the NO end of radio-frequency (RF) switch 801 through the test lead of first, second low inter-modulation 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 processed.
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 inter-modulation 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 respectively the input of the first power amplifier (201) and the second power amplifier (202);
described the first power amplifier (201) be connected the output of power amplifier (202) and connect respectively the input of the first coupler (301) and the second coupler (302), the output of described the first coupler (301) and the second coupler (302) is connected in series respectively the input of the first isolator (401) and the second isolator (402), described the first isolator (401) be connected the output of isolator (402) and jointly connect the input of 3dB electric bridge (501), described first, the coupled end of the second coupler connects respectively first, the input of the 2nd AD sampling module,
Signal after the first power amplifier (201) will amplify transfers to 3dB electric bridge (501) by the first coupler (301) and the first isolator (401) successively, signal after the second power amplifier (202) will amplify transfers to 3dB electric bridge (501) by the second coupler (302) and the second isolator (402) successively, signal after a described AD sampling module (111) is coupled to the first coupler (301) is sampled, and the signal after described the 2nd AD sampling module (112) is coupled to the second coupler (302) is sampled;
The output of described 3dB electric bridge (501) connects respectively the input of the first load (601) and the transmitting terminal of the first low inter-modulation duplexer (701), the intermodulation reflection measurement end of the test lead connected with passive measured device of the described first low inter-modulation duplexer (701), described 3dB electric bridge (501) carries out the synthetic processing of power with the two paths of signals that receives, and the signal after synthesizing transfers to the first low inter-modulation duplexer (701), and the described first low inter-modulation 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 inter-modulation duplexer (702), the transmitting terminal of the described second low inter-modulation duplexer (702) connects the input of the second load (602), above-mentioned test signal transfers to the test lead of the second low inter-modulation duplexer (702) along the intermodulation reflection transmission ends of passive measured device through passive measured device rear portion, and absorbed by the second load (602) through the transmitting terminal of the second low inter-modulation duplexer (702); Another part test signal reflexes to respectively the receiving terminal of first, second low inter-modulation duplexer along the test lead of first, second low inter-modulation duplexer, form the emission intermodulation product;
The receiving terminal of the described first low inter-modulation duplexer (701) connects the NC end of radio-frequency (RF) switch (801), the receiving terminal of the second low inter-modulation 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 respectively NC end and the NO end of radio-frequency (RF) switch (801) through the test lead of first, second low inter-modulation 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 processed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201683302U CN203278844U (en) | 2013-04-07 | 2013-04-07 | Passive multi-order intermodulation tester |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201683302U CN203278844U (en) | 2013-04-07 | 2013-04-07 | Passive multi-order intermodulation tester |
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| CN203278844U true CN203278844U (en) | 2013-11-06 |
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| CN2013201683302U Expired - Lifetime CN203278844U (en) | 2013-04-07 | 2013-04-07 | Passive multi-order intermodulation tester |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103227687A (en) * | 2013-04-07 | 2013-07-31 | 南京纳特通信电子有限公司 | Passive multi-step intermodulation tester |
| CN111257638A (en) * | 2020-01-19 | 2020-06-09 | 浙江大学 | Broadband passive intermodulation test and positioning system |
-
2013
- 2013-04-07 CN CN2013201683302U patent/CN203278844U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103227687A (en) * | 2013-04-07 | 2013-07-31 | 南京纳特通信电子有限公司 | Passive multi-step intermodulation tester |
| CN111257638A (en) * | 2020-01-19 | 2020-06-09 | 浙江大学 | Broadband passive intermodulation test and positioning system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131106 |