CN111211847A - Microwave multi-stage frequency conversion assembly phase testing system - Google Patents
Microwave multi-stage frequency conversion assembly phase testing system Download PDFInfo
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- CN111211847A CN111211847A CN201911293689.0A CN201911293689A CN111211847A CN 111211847 A CN111211847 A CN 111211847A CN 201911293689 A CN201911293689 A CN 201911293689A CN 111211847 A CN111211847 A CN 111211847A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04B17/00—Monitoring; Testing
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R25/00—Arrangements for measuring phase angle between a voltage and a current or between voltages or currents
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Abstract
The invention discloses a phase test system and a phase test method for a microwave multi-stage frequency conversion assembly, wherein the system comprises a vector network analyzer, a main control computer, a passive frequency conversion link, a first local oscillator signal source, a second local oscillator signal source, a third local oscillator signal source, a first power divider, a second power divider, a third power divider and a microwave multi-stage frequency conversion assembly, and during testing, the vector network analyzer is used for determining a vector difference value between a reference part and the passive frequency conversion link and a vector difference value between a part to be tested and the reference part; determining a vector difference value of the to-be-detected piece and the reference piece according to the vector difference value of the to-be-detected piece and the passive frequency conversion link and the vector difference value of the reference piece and the passive frequency conversion link; and determining the vector of the to-be-tested piece by combining the vector of the reference piece, and completing the phase test of the microwave multi-stage frequency conversion assembly. The reference part can be not used any more only by once calibration, and only one microwave multi-stage frequency conversion component needs to be connected, so that the connection complexity and the power consumption are reduced by half compared with the original connection complexity and power consumption.
Description
Technical Field
The invention relates to a microwave measurement technology, in particular to a microwave multi-stage frequency conversion assembly phase testing system.
Background
The microwave frequency converter is a key component widely applied to systems such as microwave communication, radar, reconnaissance monitoring, test measurement and the like, and plays a vital role in a microwave receiving system. With the development of a phased array system, higher and higher requirements are put forward on phase indexes of the microwave multi-stage frequency conversion assembly.
The input of the microwave multi-stage frequency conversion component is at a microwave radio frequency high frequency band, the output is at a low frequency band, and the comparison can not be carried out like the input and output components with the same frequency. The common frequency conversion assembly test method is to compare the simultaneous operation of a reference assembly and a piece to be tested, and requires the power-on and control states of the reference assembly and the piece to be tested to be consistent. The vector net is then frequency translated to compare the received signals. Thus, the external network setup is complicated and a reference component must be kept in operation at all times. In addition, microwave multi-stage frequency conversion assemblies generally have higher power consumption, the assemblies generate heat for a long time, the temperature instability can influence the phase test result, and if a reference part fails, the phase of the whole batch product is out of control.
Disclosure of Invention
The invention aims to provide a phase testing system of a microwave multi-stage frequency conversion assembly.
The technical solution for realizing the purpose of the invention is as follows: a phase test system of a microwave multi-stage frequency conversion assembly comprises a vector network analyzer, a main control computer, a passive frequency conversion link, a first local oscillation signal SOURCE, a second local oscillation signal SOURCE, a third local oscillation signal SOURCE, a first power divider, a second power divider, a third power divider and a microwave multi-stage frequency conversion assembly, wherein the vector network analyzer PORT1 is connected with the radio frequency input end of the microwave multi-stage frequency conversion assembly, the REF1 SOURCE OUT PORT of the vector network analyzer is connected with the radio frequency input end of the passive frequency conversion link, and the REF1 RCVRR1 IN PORT of the vector network analyzer is connected with the intermediate frequency output end of the passive frequency conversion link; the first local oscillator signal source is connected with the microwave multi-stage frequency conversion component and a first-stage local oscillator input end of the passive frequency conversion link through a first power divider; the second local oscillator signal source is connected with the microwave multi-stage frequency conversion component and the second-stage local oscillator input end of the passive frequency conversion link through a second power divider; and the third local oscillator signal source is connected with the microwave multi-stage frequency conversion component and the three-stage local oscillator input end of the passive frequency conversion link through a third power divider.
A phase test method for a microwave multi-stage frequency conversion assembly comprises the following steps:
testing a microwave multi-stage frequency conversion assembly reference part by using a vector network analyzer to obtain a vector difference value of the reference part and a passive frequency conversion link;
testing the microwave multi-stage frequency conversion component reference part by using a vector network analyzer to obtain a vector difference value of the to-be-tested part and the passive frequency conversion link;
determining a vector difference value of the to-be-detected piece and the reference piece according to the vector difference value of the to-be-detected piece and the passive frequency conversion link and the vector difference value of the reference piece and the passive frequency conversion link;
and determining the vector of the to-be-tested part according to the vector difference value of the to-be-tested part and the reference part and the vector of the reference part, and completing the phase test of the microwave multi-stage frequency conversion assembly.
Compared with the prior art, the invention has the following remarkable advantages: 1) the reference part can be not used any more only by once calibration and does not need to be in a working state all the time; 2) the passive frequency conversion link does not need to be externally powered up to work in a normal temperature state, so that the influence of temperature drift on a phase test result can be avoided; 3) only one microwave multi-stage frequency conversion component needs to be connected, and the connection complexity and the power consumption of the power supply are reduced by half compared with the original connection complexity and power consumption.
Drawings
Fig. 1 is a schematic diagram of a phase testing system of a microwave multi-stage frequency conversion assembly according to the present invention.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings.
As shown in fig. 1, the phase testing system for the microwave multi-stage frequency conversion module includes a vector network analyzer, a main control computer, a passive frequency conversion link, a local oscillation signal source 1, a local oscillation signal source 2, a local oscillation signal source 3, a first power divider, a second power divider, a third power divider, and a microwave multi-stage frequency conversion module (a reference component and a to-be-tested component). The PORT1 of the vector network analyzer is connected with the radio frequency input end of the microwave multi-stage frequency conversion component, the REF1 SOURCE OUT PORT of the vector network analyzer is connected with the radio frequency input end of the passive frequency conversion link, and the REF1 RCVRR1 IN PORT of the vector network analyzer is connected with the intermediate frequency output end of the passive frequency conversion link; the local oscillation signal source 1 is connected with the microwave multi-stage frequency conversion component and a first-stage local oscillation input end of the passive frequency conversion link through a first power divider; the local oscillation signal source 2 is connected with the microwave multi-stage frequency conversion component and a second-stage local oscillation input end of the passive frequency conversion link through a second power divider; and the local oscillation signal source 3 is connected with the microwave multi-stage frequency conversion component and the three-stage local oscillation input end of the passive frequency conversion link through a third power divider.
The passive frequency conversion link is required to be consistent with the frequency conversion relation of the microwave multi-stage frequency conversion assembly, and an YIG filter and an automatic gain control function are arranged in the vector network analyzer, for example, N5242A of Agilent has a test function of an option 080 frequency conversion device, so that the passive frequency conversion link does not need to be connected with an additional amplifier and an additional filter.
The invention also provides a phase testing method of the microwave multi-stage frequency conversion assembly, which comprises the following steps:
the method comprises the steps of firstly carrying out frequency conversion setting on a vector network analyzer and storing a setting file, controlling the vector network analyzer through a main control computer through a TCP/IP protocol through programming, controlling each local oscillator signal source through a GPIB cable by the vector network analyzer, and setting the control mode of the signal source in advance when the frequency is converted and set.
According to the method, a test instrument and a component are connected according to the graph 1, a vector network analyzer PORT1 is connected with the radio frequency input of a microwave multi-stage frequency conversion component (a reference part or a part to be tested), a REF1 SOURCE OUT PORT of the vector network analyzer is connected with the radio frequency input of a passive frequency conversion link, a PORT2 of the vector network analyzer is connected with the intermediate frequency output of the microwave multi-stage frequency conversion component (the reference part or the part to be tested), a REF1 RCVRR1 IN PORT of the vector network analyzer is connected with the intermediate frequency output end of the passive frequency conversion link, and local oscillation signals of each stage are respectively distributed to the local oscillation input ends of each stage of the microwave multi-stage.
The vector network analyzer is called by a main control computer to call a vector network internal setting file, a signal source in the vector network sends out a scanning signal, and simultaneously, the microwave multi-stage frequency conversion component (a reference component or a component to be tested) is switched to a corresponding working state through an interface, and the vector network analyzer respectively controls local oscillation signals of all stages to carry out frequency conversion simultaneously.
Since the frequencies of the reference receiver and the measurement receiver of the vector network analyzer are identical, phase comparison can be carried out inside the vector network analyzer. And setting the vector of the passive frequency conversion link as A, the vector of the microwave multi-stage frequency conversion component reference piece as B and the vector of the microwave multi-stage frequency conversion component to-be-detected piece as C.
Firstly, comparing a piece of reference part by using a vector network analyzer, wherein the test result is B-A = α, and storing the test result in a vector network as a calibration file, and then replacing the reference part as a piece to be tested, wherein the test result is C-A = β;
and (3) operations β - α are arranged inside the vector net, so that the obtained result is (C-A) - (B-A) = C-B, namely the phase of the piece to be measured can be obtained by combining the β - α and the phase of the reference piece.
Claims (5)
1. The phase test system of the microwave multi-stage frequency conversion component is characterized by comprising a vector network analyzer, a main control computer, a passive frequency conversion link, a first local oscillation signal SOURCE, a second local oscillation signal SOURCE, a third local oscillation signal SOURCE, a first power divider, a second power divider, a third power divider and the microwave multi-stage frequency conversion component, wherein the vector network analyzer PORT1 is connected with the radio frequency input end of the microwave multi-stage frequency conversion component, the REF1 SOURCE OUT PORT of the vector network analyzer is connected with the radio frequency input end of the passive frequency conversion link, and the REF1 RCVRR1 IN PORT of the vector network analyzer is connected with the intermediate frequency output end of the passive frequency conversion link; the first local oscillator signal source is connected with the microwave multi-stage frequency conversion component and a first-stage local oscillator input end of the passive frequency conversion link through a first power divider; the second local oscillator signal source is connected with the microwave multi-stage frequency conversion component and the second-stage local oscillator input end of the passive frequency conversion link through a second power divider; and the third local oscillator signal source is connected with the microwave multi-stage frequency conversion component and the three-stage local oscillator input end of the passive frequency conversion link through a third power divider.
2. The microwave multi-stage frequency conversion assembly phase test system of claim 1, wherein the passive frequency conversion link requirements are consistent with a frequency conversion relationship of the microwave multi-stage frequency conversion assembly.
3. The phase testing method of the microwave multi-stage frequency conversion assembly is characterized by comprising the following steps of:
testing a microwave multi-stage frequency conversion assembly reference part by using a vector network analyzer to obtain a vector difference value of the reference part and a passive frequency conversion link;
testing the microwave multi-stage frequency conversion component reference part by using a vector network analyzer to obtain a vector difference value of the to-be-tested part and the passive frequency conversion link;
determining a vector difference value of the to-be-detected piece and the reference piece according to the vector difference value of the to-be-detected piece and the passive frequency conversion link and the vector difference value of the reference piece and the passive frequency conversion link;
and determining the vector of the to-be-tested part according to the vector difference value of the to-be-tested part and the reference part and the vector of the reference part, and completing the phase test of the microwave multi-stage frequency conversion assembly.
4. The method of claim 3, wherein the operation of determining the vector difference between the test object and the reference object is performed in a vector network analyzer.
5. The method for testing the phase of the microwave multilevel frequency conversion assembly according to claim 3, wherein the specific method for determining the vector of the to-be-tested assembly is as follows:
setting a vector of a passive frequency conversion link as A, a vector of a reference piece of the microwave multi-stage frequency conversion assembly as B, a vector of a to-be-detected piece of the microwave multi-stage frequency conversion assembly as C, a vector difference value between the reference piece and the passive frequency conversion link as α, a vector difference value between the to-be-detected piece and the passive frequency conversion link as β, a vector difference value between the to-be-detected piece and the reference piece as C-B = (C-A) - (B-A) = β - α, and a phase of the to-be-detected piece as C = β - α + B.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111707892A (en) * | 2020-06-17 | 2020-09-25 | 扬州海科电子科技有限公司 | Test tool for 6-18GHz amplitude-phase consistent frequency conversion assembly |
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2019
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| EP1764926A2 (en) * | 2005-09-16 | 2007-03-21 | Kabushiki Kaisha Toshiba | Analog signal processing circuit and communication device therewith |
| CN104993886A (en) * | 2015-07-02 | 2015-10-21 | 中国空间技术研究院 | Method for mapping amplitude-frequency and phase-frequency characteristic curve of passive device |
| CN107104743A (en) * | 2017-05-23 | 2017-08-29 | 中国电子科技集团公司第四十研究所 | A kind of frequency conversion T/R component inter-channel phase consistency testing systems and method |
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| CN111707892A (en) * | 2020-06-17 | 2020-09-25 | 扬州海科电子科技有限公司 | Test tool for 6-18GHz amplitude-phase consistent frequency conversion assembly |
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