CN202696619U - Multi-signal passive intermodulation testing equipment - Google Patents
Multi-signal passive intermodulation testing equipment Download PDFInfo
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- CN202696619U CN202696619U CN2012202042908U CN201220204290U CN202696619U CN 202696619 U CN202696619 U CN 202696619U CN 2012202042908 U CN2012202042908 U CN 2012202042908U CN 201220204290 U CN201220204290 U CN 201220204290U CN 202696619 U CN202696619 U CN 202696619U
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Abstract
The utility model discloses multi-signal passive intermodulation comprehensively-testing equipment, which comprises signal generators, power amplifiers, combiners, splitters, couplers and a control module, wherein the signal generators are used for generating signals on at least two frequency channels; the power amplifiers are used for respectively amplifying power of the signals on the at least two frequency channels and outputting the signals; the combiners are used for combining the signals on the at least two frequency channels, which are amplified and output by the power amplifiers, and then outputting combination signals to tested equipment; the splitters are used for receiving intermodulation signals and separating forward intermodulation signals or reverse intermodulation signals from the intermodulation signals; the intermodulation signals are generated by the tested equipment according to the combination signals output by the combiners; the couplers are used for coupling the signals on the at least two frequency channels, which are amplified and output by the power amplifiers, and outputting coupling signals corresponding to the signals on the at least two frequency channels; and the control module is used for regulating the power of the signals on the at least two frequency channels, which are generated by the signal generators and are corresponding to the coupling signals, according to the coupling signals output by the couplers. The multi-signal passive intermodulation comprehensively-testing equipment has the advantages that the combination scene that multi-system multi-frequency-channel wireless signals are co-constructed and shared by an indoor distribution system is simulated through the power amplifiers and the low intermodulation combiners, and products of odd orders and even orders generated through the mixing and the intermodulation of multiple signals on different frequency channels can be detected.
Description
[technical field]
The utility model relates to electronic applications, relates in particular to a kind of many signal passives intermodulation testing equipment.
[background technology]
Development along with mobile communication, the network that has simultaneously 2G and 3G between each operator, have in the future the 4G network, each system's frequency range, standard are different, the passive intermodulation modulation case is complicated between multiband, many signals, intermodulation product is abundant, and Intermodulation Interference has become puzzlement base station, indoor distributed system to be total to the difficult problem of location coexistence and Joint construction and sharing.
In the communication system, when the process passive device of the signal more than 2 road or 2 tunnel and inactive component, because device is non-linear, phase inter-modulation between signal produces new each contrast signal processed, i.e. intermodulation product in device and equipment.Traditionally, according to signal transmission direction in device and equipment, the intermodulation product of fl transmission is called transmission intermodulation (Forward simplifies FWD), and the intermodulation product of reverse transfer is called reflection intermodulation (Reverse simplifies REV).
Prior art intermodulation testing equipment schematic as shown in Figure 1, signal generator produces with the frequency range two paths of signals, amplify through two power amplifier PA1 and PA2 respectively, and extract the power output pilot signal of power amplifier by coupler (Coupler), enter mixer (Combiner) and close the road, close the road signal through duplexer (Duplexer), from port (Port1) output, feed-in equipment under test (DUT).The reflection inter-modulated signal that produces in the equipment under test is returned port (Port1), through duplexer along separate routes, enter testing circuit from path RX and detect; The transmission inter-modulated signal that produces in the equipment under test enters another duplexer (Duplexer) from port (Port2), through duplexer along separate routes, enter testing circuit through path RX and detect.
Existing intermodulation testing equipment can produce two signals of same frequency range, and equipment under test produces in the time of can testing this two signal feed-ins falls into input signal frequency range odd-order intermodulation product, such as intermodulation products such as, 5,7 rank.
In implementing the utility model patent process, the creationary discovery of utility model people: because communication system was single in the past, signal is few, what the information source transceiver produced is same frequency band signals, the signal that receives only falls into frequency range and receives the passive intermodulation product of frequency just to receiver formation interference also in same frequency range.According to the intermodulation principle, only has 2f
1-f
2, 3f
1-2f
2, 4f
1-3f
2Deng odd-order intermodulation products such as 3,5,7 of the modulating mode former frequency range that just may fall back, so existing intermodulation testing equipment all only produces with frequency range two-way inter-modulated signal, test falls into the intermodulation products such as 3,5,7 rank of this frequency range.Development along with mobile communication technology, in base station and indoor distribution antenna-feedback system, often transmit simultaneously multiple signals, and signal frequency is respectively at different frequency range, in theory, may produce intermodulation equally between a plurality of signals of different frequency range, and, because frequency range increases, the even-order intermodulation product and more the odd-order intermodulation product of multi-modulation may fall into the concern frequency range.(930 ~ 960MHz) signals may fall into the TD-SCDMA of China Mobile frequency range (1880 ~ 1920MHz) with the intermodulation second order intermodulation product of f1+f2 pattern such as CHINAUNICOM and China Mobile GSM, the DCS(1805 of China Mobile ~ 1825MHz) with GSM(930 ~ 954MHz) signal may fall into China Mobile GSM uplink band (885 ~ 909MHz) with the second order intermodulation product of f1-f2 pattern modulation, China Mobile GSM (930 ~ 954MHz), the signal of DCS(1805 ~ 1825MHz) and TD-SCDMA(1880 ~ 1920MHz) with the third-order intermodulation product of f1+f2-f3 pattern modulation may fall into the CDMA of China Telecom uplink band (825 ~ 835MHz), the GSM(954 of CHINAUNICOM ~ 960MHz), DCS(1840 ~ 1850MHz), China Mobile GSM (930 ~ 954MHz), DCS(1805 ~ 1825MHz) signal may fall into the WCDMA of CHINAUNICOM uplink band (1940 ~ 1955MHz) with the quadravalence product of f1+f2+f3-f4 pattern modulation.Therefore, in mobile communication system, may have the hybrid passive intermodulation between multisystem base station down multiband, the many signals, the mixing intermodulation product falls into the related system uplink band may form interference to this frequency.But existing intermodulation equipment can't directly be tested multiband, the intermodulation of many signals and odd number, even-order intermodulation product.
[utility model content]
The utility model embodiment provides multiband, many signals hybrid passive intermodulation testing equipment, detects each rank intermodulation product of different frequency range mixing intermodulation.
Many signal passives of multisystem intermodulation testing equipment of the utility model embodiment comprises:
Signal generator: for generation of the signal of at least two frequency ranges;
Power amplifier: be used for the signal of described at least two frequency ranges is carried out respectively power amplification output;
Mixer: output is closed the road signal to equipment under test after being used for the signal that power amplifier amplifies at least two frequency ranges of output closed the road;
Splitter: receive inter-modulated signal, and from described inter-modulated signal, isolate transmission inter-modulated signal or reflection inter-modulated signal; Described inter-modulated signal is that the road signal that closes that equipment under test is inputted according to mixer produces;
Coupler: be used for the signal that the coupled power amplifier amplifies at least two frequency ranges of output, export at least two corresponding coupled signals of frequency band signals;
Control module: according to the coupled signal of coupler output, adjust the power of described at least two frequency band signals of signal generator generation corresponding to coupled signal.
The utility model obtains the multipath tonal signal of given power by signal generator, power amplifier, through mixer, coupler, duplexer etc., by the signal feed-in equipment under test (DUT) with port Port1 output, so that reflect intermodulation, transmission intermodulation respectively by port (Port1 and Port2) access, enter along separate routes test circuit through duplexer to RX respectively and detect.
[description of drawings]
Fig. 1 is the principle schematic of traditional many signal passives cross modulation test system;
Fig. 2 is many signal passives of the utility model embodiment intermodulation testing equipment principle schematic diagram;
Fig. 3 is the principle schematic of another many signal passives of embodiment intermodulation testing equipment of the utility model;
Fig. 4 is the again principle schematic of many signal passives of embodiment intermodulation testing equipment of the utility model;
Fig. 5 is the again principle schematic of many signal passives of embodiment intermodulation testing equipment of the utility model.
[embodiment]
Below in conjunction with drawings and Examples the utility model is further described:
See also Fig. 2, many signal passives intermodulation testing equipment of the present utility model comprises, signal generator 101, power amplifier 102, coupler (Coupler) 103, mixer (Combiner) 104, splitter 105, control module 110.Wherein, signal generator 101 is for generation of the signal of at least two frequency ranges; Power amplifier 102 is used for the signal of described at least two frequency ranges is carried out respectively power amplification output; Output was closed the road signal to outside equipment under test 106 after mixer 104 closed the road for the signal that power amplifier 102 is amplified at least two frequency ranges of output; Splitter 105 is used for receiving inter-modulated signal, and isolates transmission inter-modulated signal or reflection inter-modulated signal from described inter-modulated signal; Described inter-modulated signal is that the road signal that closes that equipment under test 106 is inputted according to mixer 104 produces; Coupler 103 is used for coupled power amplifier 102 and amplifies the signal of at least two frequency ranges of output, exports at least two corresponding coupled signals of frequency band signals; Control module 110 is adjusted the power of described at least two frequency band signals of signal generator corresponding to coupled signal 101 generations according to the coupled signal of coupler 103 outputs.
Be appreciated that transmission inter-modulated signal and the reflection inter-modulated signal by splitter 105 output equipment under tests 106 can optionally be exported in the display device by diverter switch in the present embodiment.
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 in 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.Preferably, splitter 105 is multifrequency duplexer duplexer.
In conjunction with consulting Fig. 3, among this patent embodiment, in many signal passives intermodulation testing equipment, described control module 110 obtains the power amplifier power output of the corresponding power amplifier 102 of coupled signal according to the coupled signal of coupler 101 output, by adjusting the power of described at least two frequency band signals that signal generator corresponding to coupled signal 101 produce.Further, many signal passives intermodulation testing equipment also comprises monitoring display equipment 113.Monitoring display equipment 113 is used for monitoring described control module 110, adjusts instruction according to the power amplifier power output generation of described control module 110 outputs; And according to adjusting instruction indication control module 110, to adjust the power of described at least two frequency band signals that signal generator corresponding to coupled signal 101 produce.
Optionally, many signal passives intermodulation testing equipment also comprises radio-frequency (RF) switch 108.Radio-frequency (RF) switch 108 connects respectively the first splitter 105a and the second splitter 105b, is used for switch and selects output reflection inter-modulated signal or transmission inter-modulated signal.
See also Fig. 4, concrete, a kind of passive intermodulation comprehensive tester of the present embodiment is comprised of two parts, RF processing unit 114 and monitoring processing unit 115.The radio frequency processing that act as signal of RF processing unit 114 can be finished separately test access, connect equipment under test after, produce inter-modulated signal.The effect of monitoring processing unit 115 is monitoring and control, belongs to automatic control, according to tester's input requirements, finishes the required condition of test assignment, and shows, and can substitute with frequency spectrograph or comprehensive test instrument when this part is simplified state.Signal generator 101 in the tester produces the triggering signal of each system, outputs to respectively in the power amplifier 102 each system signal that power amplifier 102 outputs need.Such as PA1 output CDMA800 signal, PA2 output GSM900 signal, PA3 output DCS1800 signal, PA4 output TD-SCDMA signal, PAn output WCDMA signal.The power amplifier output signal is through coupler 103, input in the mixer 104, after mixer 104 closes the road with multiple signals, output signal inputs to splitter 105a through another coupler 103, by splitter 105a signal is inputed to equipment under test 106, equipment under test 106 is after many signals trigger, reaction equipment under test 106 each rank intermodulation product in many signals transmissions characteristic will be produced, wherein the fl transmission inter-modulated signal is behind the splitter 105b of opposite side, separation and Extraction goes out to transmit inter-modulated signal and exports in the radio-frequency (RF) switch 108, the retroreflection inter-modulated signal through top splitter 105a separation and Extraction after, export to equally in the radio-frequency (RF) switch 108.Radio-frequency (RF) switch 108 is by software control, select as required the reflection intermodulation still to transmit intermodulation and enter into intermodulation computing module 109, intermodulation computing module 109 is modulated the inter-modulated signal that receives, and the result that will calculate changes into digital data transmission to data operation and display module 112, in display module 112, offer 111 computings of monitoring mainboard after the processing signals, and the result after will processing is back in the display module 112, and be connected to display device by the external interface of display module 112, the tester is by the data of display device, thus the intermodulation magnitude of surveying and drawing out equipment under test 106.
In the present embodiment, coupler 103 Main Functions are coupling triggering signals, and the small-signal that is coupled is offered ALC control module 110.
The effect of control module 110 is to receive coupled signal, thereby calculate the power output of power amplifier, and with in the input value display module 112 as a result, after processing these data, display module 112 offers in the monitoring mainboard 111, monitoring mainboard 111 carries out power correction according to the power of tester's needs, the result is passed in the display module 112, after processing, display module 112 offers control module 110, control module 110 offers signal generator 101 with the corrected signal of feedback, the output level of control signal generator 101 is the intensity that the tester needs thereby make the signal of power amplifier output.Need triggering signal to be+43dBm such as the tester, ALC control module 110 makes the output power of whole system and is stabilized in+43dBm.The effect of load 107 is to absorb powerful triggering signal, prevents that reflection from causing mapping error.
See also Fig. 5, concrete, a kind of passive intermodulation comprehensive tester of the present embodiment also comprises Extended Capabilities Port Port3.In the present embodiment, the passive intermodulation comprehensive tester is introduced the external source of different frequency range by Extended Capabilities Port Port3.And then mixer 104 can close various multiple signals road and output.Consult embodiment illustrated in fig. 4ly, as seen, the present embodiment passive intermodulation comprehensive tester is by introducing Extended Capabilities Port, and testing scheme more flexibly is to satisfy the needs of different application scene.
This shows, the utility model provides multisystem, many signal passives intermodulation testing equipment, and provide the plurality of optional adaptation scheme, 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 is to be understood that, all do not break away from technical scheme and the improvement thereof of spirit and scope of the present utility model, and it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (8)
1. the equipment of signal passive intermodulation testing more than a kind is characterized in that comprising:
Signal generator: for generation of the signal of at least two frequency ranges;
Power amplifier: be used for the signal of described at least two frequency ranges is carried out respectively power amplification output;
Mixer: output is closed the road signal to equipment under test after being used for the signal that power amplifier amplifies at least two frequency ranges of output closed the road;
Splitter: receive inter-modulated signal, and from described inter-modulated signal, isolate transmission inter-modulated signal or reflection inter-modulated signal; Described inter-modulated signal is that the road signal that closes that equipment under test is inputted according to mixer produces;
Coupler: be used for the signal that the coupled power amplifier amplifies at least two frequency ranges of output, export at least two corresponding coupled signals of frequency band signals;
Control module: according to the coupled signal of coupler output, adjust the power of described at least two frequency band signals of signal generator generation corresponding to coupled signal.
2. many signal passives intermodulation testing equipment according to claim 1, it is characterized in that: described control module obtains the power amplifier power output of the corresponding power amplifier of coupled signal according to the coupled signal of coupler output, by adjusting the power of described at least two frequency band signals that signal generator corresponding to coupled signal produce.
3. many signal passives intermodulation testing equipment according to claim 2 is characterized in that: described many signal passives intermodulation testing equipment also comprises monitoring display equipment,
Described monitoring display equipment is used for monitoring described control module, adjusts instruction according to the power amplifier power output generation of described control module output; And according to adjusting instruction indication control module, to adjust the power of described at least two frequency band signals that signal generator corresponding to coupled signal produce.
4. many signal passives intermodulation testing equipment according to claim 3 is characterized in that:
Coupler, what be used for also that according to mixer output closes that the road signal obtains closes the road coupled signal, will close the road coupled signal and feed back to monitoring display equipment;
Described monitoring display equipment is according to the power amplifier power output of described control module output and close the road coupled signal and generate and adjust instruction.
5. many signal passives intermodulation testing equipment according to claim 4, it is characterized in that: described splitter also comprises the first splitter;
Described the first splitter is arranged between mixer and the equipment under test input, be used for equipment under test receive and process close the road signal after, isolate the reflection inter-modulated signal.
6. many signal passives intermodulation testing equipment according to claim 4, it is characterized in that: described splitter also comprises the second splitter;
Described the second splitter is arranged at the equipment under test output, be used for equipment under test receive and process close the road signal after, isolate the transmission inter-modulated signal.
7. according to claim 5 or 6 described many signal passives intermodulation testing equipment, it is characterized in that: described many signal passives intermodulation testing equipment also comprises radio-frequency (RF) switch;
Described radio-frequency (RF) switch connects respectively the first splitter and the second splitter, is used for switch and selects output reflection inter-modulated signal or transmission inter-modulated signal.
8. according to claim 5 or 6 described many signal passives intermodulation testing equipment, it is characterized in that: described many signal passives intermodulation testing equipment also comprises Extended Capabilities Port; Introduce the external source of different frequency range by Extended Capabilities Port.
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| CN2012202042908U CN202696619U (en) | 2012-05-08 | 2012-05-08 | Multi-signal passive intermodulation testing equipment |
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| CN2012202042908U CN202696619U (en) | 2012-05-08 | 2012-05-08 | Multi-signal passive intermodulation testing equipment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106301607A (en) * | 2016-08-10 | 2017-01-04 | 北京理工大学 | The test device of a kind of modulated signal passive intermodulation and method of testing |
| CN113267718A (en) * | 2021-07-19 | 2021-08-17 | 成都市克莱微波科技有限公司 | Power amplifier testing method and device and computer readable storage medium |
-
2012
- 2012-05-08 CN CN2012202042908U patent/CN202696619U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106301607A (en) * | 2016-08-10 | 2017-01-04 | 北京理工大学 | The test device of a kind of modulated signal passive intermodulation and method of testing |
| CN106301607B (en) * | 2016-08-10 | 2018-12-14 | 北京理工大学 | A kind of test device and test method of modulated signal passive intermodulation |
| CN113267718A (en) * | 2021-07-19 | 2021-08-17 | 成都市克莱微波科技有限公司 | Power amplifier testing method and device and computer readable storage medium |
| CN113267718B (en) * | 2021-07-19 | 2021-09-17 | 成都市克莱微波科技有限公司 | Power amplifier testing method and device and computer readable storage medium |
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