CN105635728A - Far-field testing system - Google Patents
Far-field testing system Download PDFInfo
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- CN105635728A CN105635728A CN201410602945.0A CN201410602945A CN105635728A CN 105635728 A CN105635728 A CN 105635728A CN 201410602945 A CN201410602945 A CN 201410602945A CN 105635728 A CN105635728 A CN 105635728A
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- test system
- far field
- reference antenna
- antenna
- far
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- Monitoring And Testing Of Transmission In General (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The invention discloses a far-field testing system, and belongs to the field of measurement devices. The system comprises a signal source, a microwave dark room, a DC isolator, a DC power supply, and a testing receiver. The system is characterized in that the DC power supply is connected with the testing receiver through the DC isolator; the interior of the microwave dark room is provided with a polarized rotating device, a transmitting antenna, a gain reference antenna, and a rotating table, wherein the polarized rotating device is connected with the transmitting antenna; the gain reference antenna is connected with the rotating table; and the gain reference antenna is connected with the DC isolator. The system is set at a place which is far from the signal source, so as to achieve the purpose of measurement. The analysis of the uniformity of an integrated outdoor unit far-field measurement system place and the inhibition effect of a reflection signal indicates that the attenuation value of the reflection signal because of a dark room wave absorption material meets a specified limit value, so the system can meet the demands of field testing. The system is simple in structure, and is easy to operate.
Description
Technical field
The invention belongs to measurement apparatus field, particularly relate to a kind of far field test system.
Background technology
In all trades and professions, especially electronic applications, various measurement apparatus is of a great variety. Integration outdoor unit is the important component part of satellite television receiving system, and its quality good or not directly influences the view reception effect of satellite television receiving system. Traditional, the commonly used circular waveguide of feed, and caliber size disunity, this brings extreme difficulties to waveguide method measurement. Far-field measurement system is to set up receiver and transmitter in a small microwave darkroom, and tested integration outdoor unit is placed on reception device, and standard emission loudspeaker installed by discharger. Receive and all can do horizontal direction under the control of the computer or around self axial-rotation with transmitting apparatus. For test system, the electromagnetic wave that transmitting antenna is launched should form uniform Field strength coverage in region residing for tested integration outdoor unit. For the distance that this transmitting antenna should be sufficiently spaced-apart with tested integrated outdoor unit, and place reflection should be sufficiently small. Nonetheless, also difficulty guarantees the electric field uniformity in region, tested integration outdoor unit place.
Summary of the invention
Present invention seek to address that the problems referred to above, it is provided that a kind of far field test system.
A kind of far field test system, including signal source, microwave dark room, stopping direct current device, DC source and test receiver; It is characterized in that DC source is connected with test receiver by stopping direct current device; Being provided with polarized rotation device, transmitting antenna, gain reference antenna and turntable in microwave dark room, wherein polarized rotation device is connected with transmitting antenna; Gain reference antenna is connected with turntable; Gain reference antenna is connected with stopping direct current device.
A kind of far field test system of the present invention, it is characterised in that the vertical dimension in described signal source distance microwave darkroom is 2.6m.
A kind of far field test system of the present invention, it is characterised in that the bore of described transmitting antenna is 0.08m.
A kind of far field test system of the present invention, it is characterised in that the bore of described reference antenna is 0.08m.
A kind of far field test system of the present invention, it is characterised in that the polarization mode of described transmitting antenna is horizontal polarization mode.
A kind of far field test system of the present invention, it is characterised in that described test receiver is audiofrequency spectrometer or Network Analyzer.
A kind of far field test system of the present invention, it is characterised in that described gain reference antenna is set to horizontal polarization mode.
A kind of far field test system of the present invention, by test system being arranged a distance signal source larger distance, realize the purpose measured, by integration outdoor unit far-field measurement system place uniformity and reflected signal inhibition analysis are learnt, darkroom absorbing material to the pad value of reflected signal more than 26dB, being satisfied by the limit value of regulation, therefore far field test system can well complete field testing requirement. Test system of the present invention, simple in construction is easily operated.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention;
Wherein 1-signal source; 2-polarized rotation device; 3-transmitting antenna; 4-gain reference antenna/integration outdoor unit; 5-turntable; 6-stopping direct current device; 7-DC source; 8-test receiver.
Detailed description of the invention
A kind of far field test system, including signal source 1, microwave dark room, stopping direct current device 6, DC source 7 and test receiver 8; It is characterized in that DC source 7 is connected with test receiver 8 by stopping direct current device 6; Being provided with polarized rotation device 2, transmitting antenna 3, gain reference antenna 4 and turntable 5 in microwave dark room, wherein polarized rotation device 2 is connected with transmitting antenna 3; Gain reference antenna 4 is connected with turntable 5; Gain reference antenna 4 is connected with stopping direct current device 6.
A kind of far field test system of the present invention, the vertical dimension in described signal source 1 distance microwave darkroom is 2.6m. The bore of described transmitting antenna 3 is 0.08m. The bore of described reference antenna is 0.08m, and therefore in integration outdoor unit test frequency range, L is minimum should reach 1.6m. The polarization mode of described transmitting antenna 3 is horizontal polarization mode, and transmitting antenna 3 and integration outdoor unit are set to horizontal polarization mode. Signal source 1 is set to center operating frequency. Adjusting tested integration outdoor unit makes incoming level maximum, keeps polarization alignment, records the output level value of integral high frequency head after stable. Signal source 1 is kept to arrange constant, tested integration outdoor unit is moved axially and moves left and right, after installing in test system due to common tuner, its shaft orientation moving range��4cm, and the electric size��16cm of tuner, therefore, in proof procedure, the movable 4cm of tested feed, moves left and right 16cm. When tested integration outdoor unit moves axially to transmitting antenna 3, its output level maximum changing value is 0.17dB; When tested integration outdoor unit moves left and right, its output level maximum changing value is 0.33dB. In two kinds of situations, level maximum changing value is respectively less than 1.5dB. Described test receiver 8 is audiofrequency spectrometer or Network Analyzer. Described gain reference antenna 4 is set to horizontal polarization mode.
Claims (7)
1. a far field test system, including signal source (1), microwave dark room, stopping direct current device (6), DC source (7) and test receiver (8); It is characterized in that DC source (7) is connected with test receiver (8) by stopping direct current device (6); Being provided with polarized rotation device (2), transmitting antenna (3), gain reference antenna (4) and turntable (5) in microwave dark room, wherein polarized rotation device (2) is connected with transmitting antenna (3); Gain reference antenna (4) is connected with turntable (5); Gain reference antenna (4) is connected with stopping direct current device (6).
2. a kind of far field test system as claimed in claim 1, it is characterised in that the vertical dimension in described signal source (1) distance microwave darkroom is 2.6m.
3. a kind of far field test system as claimed in claim 1, it is characterised in that the bore of described transmitting antenna (3) is 0.08m.
4. a kind of far field test system as claimed in claim 1, it is characterised in that the bore of described reference antenna is 0.08m.
5. a kind of far field test system as described in claim 1 or 3, it is characterised in that the polarization mode of described transmitting antenna (3) is horizontal polarization mode.
6. a kind of far field test system as claimed in claim 1, it is characterised in that described test receiver (8) is audiofrequency spectrometer or Network Analyzer.
7. a kind of far field test system as claimed in claim 1, it is characterised in that described gain reference antenna (4) is set to horizontal polarization mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410602945.0A CN105635728A (en) | 2014-10-31 | 2014-10-31 | Far-field testing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410602945.0A CN105635728A (en) | 2014-10-31 | 2014-10-31 | Far-field testing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105635728A true CN105635728A (en) | 2016-06-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410602945.0A Pending CN105635728A (en) | 2014-10-31 | 2014-10-31 | Far-field testing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105635728A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106970272A (en) * | 2017-05-19 | 2017-07-21 | 四川莱源科技有限公司 | Near field far field multifunctional test system |
| CN107197243A (en) * | 2017-05-19 | 2017-09-22 | 四川莱源科技有限公司 | Near field and far field integrated measurement system |
| CN113960378A (en) * | 2020-07-20 | 2022-01-21 | 川升股份有限公司 | Quasi-far-field measurement system and quasi-far-field measurement method |
-
2014
- 2014-10-31 CN CN201410602945.0A patent/CN105635728A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106970272A (en) * | 2017-05-19 | 2017-07-21 | 四川莱源科技有限公司 | Near field far field multifunctional test system |
| CN107197243A (en) * | 2017-05-19 | 2017-09-22 | 四川莱源科技有限公司 | Near field and far field integrated measurement system |
| CN113960378A (en) * | 2020-07-20 | 2022-01-21 | 川升股份有限公司 | Quasi-far-field measurement system and quasi-far-field measurement method |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160601 |