CN106896276A - A kind of near field test system - Google Patents
A kind of near field test system Download PDFInfo
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- CN106896276A CN106896276A CN201710112690.3A CN201710112690A CN106896276A CN 106896276 A CN106896276 A CN 106896276A CN 201710112690 A CN201710112690 A CN 201710112690A CN 106896276 A CN106896276 A CN 106896276A
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- phase shift
- attenuation
- phase
- test system
- near field
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/10—Radiation diagrams of antennas
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The present invention provides a kind of near field test system, it is characterised in that including：Phase shift attenuation network, industrial computer and electric power system；The phase shift attenuation network is composed in parallel by multiple phase shift attenuation modules, and each phase shift attenuation module is composed in parallel by multiple phase shift blocks and attenuation module, and wherein the quantity of phase shift block is consistent with the quantity of attenuation module；Through the above way, this test system possesses Automated condtrol measuring instrument and system equipment, automates the functions such as breakdown judge and treatment, automation data record, preservation, treatment and test report generation, visible process displaying.
Description
Technical field
The present invention relates to phased array antenna test system field, more particularly to a kind of near field test system.
Background technology
Microwave phase shifter is the core component in phased-array radar, satellite communication, mobile communication equipment, and its work is frequently
Band, insertion loss directly affect antijamming capability and the sensitivity of these equipment, and the weight of system, volume and cost,
Therefore research broadband, the phase shifter of filter with low insertion loss militarily have great importance with Civil Satellite Communication field, existing phase shift
Attenuation schemes measurement frequency supports not wide enough, and it is narrower to shift to attenuation module operating temperature range, therefore proposes that a kind of temperature wide is wide
The phase shift attenuation units of frequency.
The content of the invention
To realize above-mentioned technical purpose, above-mentioned technique effect is reached, propose a kind of near field test system, its phase shift decay mode
Block can reach-20 DEG C of -+55 DEG C of wide temperature ranges, support 0.8-2GHz working frequencies, and system testing sensitivity is less than-117dBm,
Measuring accuracy is less than ± 0.25 dBm, channel amplitude uniformity≤1dB, channel phase consistency≤± 4 °, by terminal calculating
Machine realizes remote control to phase shift attenuation network.Terminal computer is decayed by exchange control unit through external communication bus with phase shift
Ripple control distribution board communications in unit, so as to control the amplitude of phase shift attenuation module, phase characteristic.
The present invention is achieved through the following technical solutions：A kind of near field test system, it is characterised in that including：Phase shift decays
Network, industrial computer and electric power system；
The phase shift attenuation network is composed in parallel by multiple phase shift attenuation modules, and each phase shift attenuation module is by multiple phase shift blocks
Composed in parallel with attenuation module, wherein the quantity of phase shift block is consistent with the quantity of attenuation module；
The phase shift attenuation network input connects prefix switch, and switch ends are respectively external wireless input and calibration signal
Input, the calibration signal input is connected on same switch matrix；The logical output synthesized output signal of output end, and lead to
Cross and switch its transmitting output state and align mode, and by rearmounted switched shunt, it is exported for transmitting all the way, another road connection
Prefix switch matrix, as the input of calibration signal.
Specifically,
The phase shift block uses digital switch type phase shifter, and phase shift function realizes fixing phase using switching line phase shifter mode
1.4 °, 2.8 °, 5.6 °, 11.2 °, 22.5 °, 45 °, 90 °, 180 ° and 360 ° of position, then realized by phase-shifting unit combination superposition
Change of the phase from 0 ° to 360 °.
The attenuation module realizes fixed attenuation amount using microwave attenuation chip HMC539LP3 and HMC472LP3
0.125dB, 0.25dB, 0.5dB, 1dB, 2dB, 4dB, 8dB, 16dB and 32dB, then declined by the chip portfolio superposition realization that decays
Change of the decrement from 0dB ~ 50dB.
The situation of prior art is different from, the beneficial effects of the invention are as follows：This test system possesses Automated condtrol measurement
Instrument and system equipment, automate breakdown judge and treatment, and automation data record, preservation, treatment and test report generation can
Depending on changing the functions such as flow displaying, led to the ripple control distribution plate in phase shift attenuation units by exchange control unit through external communication bus
Letter, so as to control the amplitude of phase shift attenuation module, phase characteristic.
Brief description of the drawings
Fig. 1 is a kind of system construction drawing of near field test system of the invention.
Fig. 2 is phase shift attenuation units structure chart of the present invention.
Fig. 3 is phase shift attenuator circuit of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Referring to Fig. 1, a kind of near field test system, it is characterised in that including：Phase shift attenuation network, industrial computer and
Electric power system；
The phase shift attenuation network is composed in parallel by multiple phase shift attenuation modules, and each phase shift attenuation module is by multiple phase shift blocks
Composed in parallel with attenuation module, wherein the quantity of phase shift block is consistent with the quantity of attenuation module；
The phase shift attenuation network input connects prefix switch, and switch ends are respectively external wireless input and calibration signal
Input, the calibration signal input is connected on same switch matrix；The logical output synthesized output signal of output end, and lead to
Cross and switch its transmitting output state and align mode, and by rearmounted switched shunt, it is exported for transmitting all the way, another road connection
Prefix switch matrix, as the input of calibration signal.
In the present embodiment, phase shift attenuation network is made up of 48 phase shift attenuation modules as shown in Figure 2 and Figure 3, and each phase shift declines
Subtract module to be made up of 48 displacement phase modules, 48 attenuation modules；From the road aerial signals of array antenna received Dao 48 by cable
It is sent in 48 receiving channels.Each passage is received by host computer by after the control code that FPGA is issued, docking the collection of letters number
Carry out width phase control.Amplitude weighting is controlled to 9 0.125dB steppings, and phase shift is controlled to 11 1.40625 ° of steppings.With
Afterwards, the signal input after width phase control is exported to after in the power synthesis network of rear class, synthesizing wave beam to be measured.The phase shifter is adopted
With digital switch type phase shifter, it is assumed that L1 and L2 are two sections of microstrip lines or coaxial line of different length, can also be other classes
The transmission line of type.Because L1 is different with the length of L2, cause the difference of signal transmission path, so that the phase shift realized is：
△Φ=β（L2-L1）=（2πf/vp）（L2-L1）
Wherein β is the transmission of transmission line, vpIt is phase velocity, f is working frequency points, L2And L1Respectively two biographies of different paths
Defeated line length.Phase shift function realized using switching line phase shifter mode 1.4 ° of stationary phase, 2.8 °, 5.6 °, 11.2 °,
22.5 °, 45 °, 90 °, 180 ° and 360 °, then change of the phase from 0 ° to 360 ° is realized by phase-shifting unit combination superposition.
The attenuation module realizes fixed attenuation amount using microwave attenuation chip HMC539LP3 and HMC472LP3
0.125dB, 0.25dB, 0.5dB, 1dB, 2dB, 4dB, 8dB, 16dB and 32dB, then declined by the chip portfolio superposition realization that decays
Change of the decrement from 0dB ~ 50dB.
When antenna starts calibration, ripple is controlled in calibration mode, each passage individually can be controlled, and make to remove
The attenuator on other passages outside calibrated channel is placed in maximum attenuation state（Including 8 32dB numerical control attenuations and 1 20dB
Decay）, so as to ensure tested channel signal in an ON state, other passages are off.
In calibration mode, beam steering system controls each passage to be worked in ground state, i.e. the phase-shift states of zero attenuation zero, then
By switch matrix from the input signal of passage 1, the width phase performance of test signal, and as school reference of reference, then change radio frequency letter
Number input channel, from passage 1 to passage 48, tests each path input to the width phase difference for synthesizing output end one by one, and by end
End computer recording and storage, collects the width phase difference table for obtaining each passage, that is, calibrate table.By beam steering system, by it
It is stored among the FLASH of ripple control daughter board, in case taking out phase from the table according to the frequency of target in beam scanning mode of operation
The calibration of amplitude and phase value of passage, data in real-time calling calibration table is answered to complete the function of each passage calibration.Its calibration content includes width
Degree weighting, phase shift stepping, frequency, control code state, temperature（It is undetermined）Deng.
Through the above way, this test system possesses Automated condtrol measuring instrument and system equipment, and automation failure is sentenced
Break and process, automation data record, preservation, treatment and test report are generated, the function such as visible process displaying.
Embodiments of the invention are the foregoing is only, the scope of the claims of the invention is not thereby limited, it is every to utilize this hair
Equivalent structure or equivalent flow conversion that bright specification and accompanying drawing content are made, or direct or brief introduction are used in other correlation techniques
Field, is included within the scope of the present invention.
Claims (3)
1. a kind of near field test system, it is characterised in that including：Phase shift attenuation network, industrial computer and electric power system；
The phase shift attenuation network is composed in parallel by multiple phase shift attenuation modules, and each phase shift attenuation module is by multiple phase shift blocks
Composed in parallel with attenuation module, wherein the quantity of phase shift block is consistent with the quantity of attenuation module；
The phase shift attenuation network input connects prefix switch, and switch ends are respectively external wireless input and calibration signal
Input, the calibration signal input is connected on same switch matrix；The logical output synthesized output signal of output end, and lead to
Cross and switch its transmitting output state and align mode, and by rearmounted switched shunt, it is exported for transmitting all the way, another road connection
Prefix switch matrix, as the input of calibration signal.
2. a kind of near field test system according to claim 1, it is characterised in that：The phase shift block uses digital switch
Type phase shifter, phase shift function realized using switching line phase shifter mode 1.4 ° of stationary phase, 2.8 °, 5.6 °, 11.2 °,
22.5 °, 45 °, 90 °, 180 ° and 360 °, then change of the phase from 0 ° to 360 ° is realized by phase-shifting unit combination superposition.
3. a kind of near field test system according to claim 1, it is characterised in that：The attenuation module uses microwave attenuation
Chip HMC539LP3 and HMC472LP3 come realize fixed attenuation amount 0.125dB, 0.25dB, 0.5dB, 1dB, 2dB, 4dB, 8dB,
16dB and 32dB, then change of the attenuation from 0dB ~ 50dB is realized by the chip portfolio superposition that decays.
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| CN201710112690.3A CN106896276A (en) | 2017-02-28 | 2017-02-28 | A kind of near field test system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107991541A (en) * | 2017-11-27 | 2018-05-04 | 中国电子科技集团公司第三十八研究所 | A kind of near field antenna test control device and its test method |
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| CN101483273A (en) * | 2009-02-24 | 2009-07-15 | 中国航天科技集团公司第五研究院第五○四研究所 | Calibration method for amplitude and phase variable array antenna |
| CN104330777A (en) * | 2014-11-25 | 2015-02-04 | 成都金本华科技股份有限公司 | Self-calibration method for receiving-transmitting channel of active phased array radar |
| CN105548978A (en) * | 2015-12-16 | 2016-05-04 | 中国电子科技集团公司第四十一研究所 | Active reflection coefficient test system and method of phased array antenna |
| CN106291106A (en) * | 2015-05-20 | 2017-01-04 | 北京理工大学 | Multichannel width tests system mutually |
| CN106375034A (en) * | 2016-08-29 | 2017-02-01 | 成都九洲迪飞科技有限责任公司 | System for calibrating TR component transceiving channel through antenna spatial coupling |
| CN106443211A (en) * | 2016-07-29 | 2017-02-22 | 西安空间无线电技术研究所 | Integrated correcting system and correcting method applied to different active array antennas |
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2017
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101483273A (en) * | 2009-02-24 | 2009-07-15 | 中国航天科技集团公司第五研究院第五○四研究所 | Calibration method for amplitude and phase variable array antenna |
| CN104330777A (en) * | 2014-11-25 | 2015-02-04 | 成都金本华科技股份有限公司 | Self-calibration method for receiving-transmitting channel of active phased array radar |
| CN106291106A (en) * | 2015-05-20 | 2017-01-04 | 北京理工大学 | Multichannel width tests system mutually |
| CN105548978A (en) * | 2015-12-16 | 2016-05-04 | 中国电子科技集团公司第四十一研究所 | Active reflection coefficient test system and method of phased array antenna |
| CN106443211A (en) * | 2016-07-29 | 2017-02-22 | 西安空间无线电技术研究所 | Integrated correcting system and correcting method applied to different active array antennas |
| CN106375034A (en) * | 2016-08-29 | 2017-02-01 | 成都九洲迪飞科技有限责任公司 | System for calibrating TR component transceiving channel through antenna spatial coupling |
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| CN107991541A (en) * | 2017-11-27 | 2018-05-04 | 中国电子科技集团公司第三十八研究所 | A kind of near field antenna test control device and its test method |
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Application publication date: 20170627 |