CN210007708U - Phased array antenna test calibration system based on compact field - Google Patents
Phased array antenna test calibration system based on compact field Download PDFInfo
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- CN210007708U CN210007708U CN201921515908.0U CN201921515908U CN210007708U CN 210007708 U CN210007708 U CN 210007708U CN 201921515908 U CN201921515908 U CN 201921515908U CN 210007708 U CN210007708 U CN 210007708U
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Abstract
The utility model relates to an phased array antenna test calibration system based on compact field, including plane of reflection, feed, phased array antenna, change over switch, network analysis appearance and controller, wherein, the feed sets up in plane of reflection curved surface focus position, phased array antenna includes the base plate, be provided with a plurality of oscillators that are the array and arrange on the base plate, change over switch is connected with every oscillator electricity, network analysis appearance is connected with the feed electricity, be used for outputting test signal, and receive the signal of receiving through change over switch and oscillator, the controller is connected with the change over switch electricity, be used for controlling the break-make of change over switch and every oscillator, and, the controller still is connected with network analysis appearance electricity, be used for controlling network analysis appearance output test signal, and receive the received signal through change over switch and oscillator, compare test signal and received signal, obtain phase difference and range difference.
Description
Technical Field
The utility model relates to an array antenna test field especially relates to phased array antenna test calibration system based on compact range.
Background
A phased array antenna refers to an antenna that changes the shape of a pattern by controlling the feeding phase and amplitude of radiating elements, i.e., elements, in an array antenna. The control phase can change the direction of the maximum value of the antenna pattern so as to achieve the purpose of beam scanning.
Refer to fig. 1 and 2. Fig. 1 shows a phased array antenna test calibration system in the prior art, and fig. 2 shows a schematic structural diagram of a phased array antenna test calibration system in the prior art, in which elements are arranged on a substrate in an array arrangement.
At present, a phased array antenna test calibration system comprises an array antenna arranged on a rotary table, wherein the array antenna comprises a substrate 3 ' and a plurality of vibrators 4 ' arranged on the substrate 3 ', each vibrator 4 ' is aligned by in parallel to be tested through a test probe 1 ' arranged on a scanning frame 2 ', the current phase and amplitude of each vibrator 4 ' are obtained, and the current phase and amplitude are compared with pre-calibrated values to calibrate by .
SUMMERY OF THE UTILITY MODEL
To overcome the above-described problems of the prior art, at least to a certain extent at , the present invention provides compact range-based phased array antenna test calibration systems.
The utility model discloses an phased array antenna test calibration system based on compact range, include:
a reflective surface;
the feed source is arranged at the position of the curved surface focus of the reflecting surface;
a phased array antenna disposed within a quiet zone of a compact range; comprises a substrate; the substrate is provided with a plurality of vibrators which are arranged in an array manner;
the switch is electrically connected with each vibrator and is used for switching the on-off of each vibrator;
the network analyzer is electrically connected with the feed source and used for outputting a test signal and receiving a signal received by the selector switch and the oscillator;
and the controller is also electrically connected with the network analyzer and used for controlling the network analyzer to output a test signal, receiving a receiving signal passing through the selector switch and the oscillator, and comparing the test signal with the receiving signal to obtain a phase difference and an amplitude difference.
The utility model discloses has following technological effect:
, the controller is used to control the switch to switch the oscillator test, so that the test efficiency is greatly improved, for example, for a 1m × 1m antenna array, for example, for a full-band test from 20G to 43.5G, if points are measured every 10 million, that is, the step length is 0.01, the whole measurement process only needs about hours, and compared with the test by the test probe in the prior art, the test efficiency is increased by several times, or ten times, or even ten times.
Second, the utility model discloses a test error is little, and phase error compares 10 in prior art between 3- +/-5, and the error descends to some extent between 3- +/-5, and simultaneously, Ripple level (Ripple) error falls to 0.25 db.
Thirdly, the installation is convenient, is easy to push, and the device is economical and practical.
, in the above compact range based phased array antenna test calibration system, the switch is a mechanical switch or an electrical switch.
, in the above compact range based phased array antenna test calibration system, the reflector, the feed and the phased array antenna are located in a microwave darkroom.
, in the phased array antenna test calibration system based on compact range, the inner wall of the microwave anechoic chamber is provided with a wave absorbing structure.
further reduces the measurement error through the wave absorbing structure.
, the phased array antenna test calibration system based on compact range further includes a feed source position adjusting mechanism, and the feed source is connected with the feed source position adjusting mechanism.
Through feed source position adjustment mechanism, make things convenient for the adjustment of feed source position, make the test result of tightening field test more accurate reliable.
, in the system, the surface tolerance of the reflecting surface is 1/100 of the wavelength corresponding to the frequency of the test signal.
By controlling the surface tolerance, the accuracy and reliability of the test result of the compact range test are improved.
, in the compact range based phased array antenna test calibration system, the edge of the reflective surface is provided with a curl, and the curl of the curl is opposite to the dead space.
The parabolic curved surface in the middle of the reflecting surface receives spherical waves of the feed source, the spherical waves are reflected to the quiet zone to generate plane waves, the curled edge of the curled edge can enable generated current to flow along the curled edge, scattering occurs at the edge of the curled edge, and the edge of the curled edge is arranged on the position opposite to the quiet zone, so that interference on signals of the quiet zone cannot be generated, and the accuracy and reliability of the test result of the compact range test are improved
, in the phased array antenna test calibration system based on compact range, a wave absorbing structure is arranged between the feed source and the quiet zone.
In order to avoid the leakage of electromagnetic waves radiated by the feed source to the quiet zone region, the wave absorbing material is used for effectively shielding the suitable position between the feed source and the quiet zone, and the accuracy and reliability of the test result of the compact range test are further improved .
It is to be understood that both the foregoing -based general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated herein and constitute part of this specification, illustrate embodiments consistent with the invention and together with the description , serve to explain the principles of the invention.
FIG. 1 is a schematic diagram of a phased array antenna test calibration system using a test probe for testing in the prior art
Fig. 2 is a schematic structural diagram of a phased array antenna test calibration system in the prior art, in which oscillators disposed on a substrate are arranged in an array;
FIG. 3 is a schematic structural diagram of an embodiment of the compact range-based phased array antenna test calibration system of the present invention;
fig. 4 is the utility model discloses phased array antenna test calibration system embodiment based on compact field, the connection relation sketch map of change over switch and the oscillator that sets up on the base plate.
Wherein:
1' test probe
2' scanning frame
3' substrate
4' vibrator
1 feed source
2 reflective surface
3 quiet zone
4 change-over switch
5 controller
6 network analyzer
7 substrate
8 vibrator
9 feed source position adjusting mechanism
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 3 and 4, embodiments of the compact range based phased array antenna test calibration system of the present invention are shown.
In the embodiment, the compact range-based phased array antenna test calibration system comprises: reflecting surface 2, feed source 1, phased array antenna, change-over switch 4, network analyzer 6 and controller 5.
The feed source 1 is arranged at the curved surface focus position of the reflecting surface 2, the phased array antenna is arranged in a quiet zone 3 of a compact range, the phased array antenna comprises a substrate 7, a plurality of oscillators 8 which are arranged in an array mode are arranged on the substrate 7, and a selector switch 4 is electrically connected with each oscillator 8 and used for switching on and off of each oscillator 8, and the phased array antenna is shown in a figure 4.
And the network analyzer 6 is electrically connected with the feed source 1 and used for outputting a test signal and receiving a signal received by the selector switch 4 and the oscillator 8.
And the controller 5 is also electrically connected with the network analyzer 6 and is used for controlling the network analyzer 6 to output a test signal, receiving a receiving signal passing through the selector switch 4 and the vibrator 8, comparing the test signal with the receiving signal to obtain a phase difference and an amplitude difference, and calibrating the vibrator 8 according to the phase difference and the amplitude difference.
The embodiment has the following technical effects:
, the controller is used to control the switch to switch the oscillator test, so that the test efficiency is greatly improved, for example, for a 1m × 1m antenna array, for example, for a full-band test from 20G to 43.5G, if points are measured every 10 million, that is, the step length is 0.01, the whole measurement process only needs about hours, and compared with the test by the test probe in the prior art, the test efficiency is increased by several times, or ten times, or even ten times.
Secondly, the test error is small, the phase error is between +/-3 degrees and +/-5 degrees, the error is reduced to +/-0.25 db compared with +/-10 degrees in the prior art, and meanwhile, the Ripple error is reduced to +/-0.25 db.
Thirdly, the installation is convenient, is easy to push, and the device is economical and practical.
In this embodiment, the reflector, feed and phased array antenna are located in a microwave anechoic chamber, the inner wall of which is provided with a wave absorbing structure, through which further reduction of measurement errors can be achieved.
In the above embodiments, the change-over switch may be a mechanical switch or an electrically controlled switch. The utility model discloses do not limit to this.
Referring to fig. 3, it can be seen that the present embodiment further includes a feed position adjustment mechanism 9; the feed source 1 is connected with a feed source position adjusting mechanism 9. Through feed source position adjustment mechanism, make things convenient for the adjustment of feed source position, make the test result of tightening field test more accurate reliable.
To further reduce the test error and improve the calibration accuracy , the surface roughness of the reflective surface 1 can be controlled, and the surface tolerance of the reflective surface 1 can be designed to be 1/100 of the wavelength corresponding to the frequency of the test signal.
, the edge of the reflecting surface 1 can also be provided with a curl, the curl of which is directed in the opposite direction to the dead space.
The paraboloidal curved surface in the middle of the reflecting surface 1 receives spherical waves of a feed source and reflects the spherical waves into the quiet zone 3 to generate plane waves, the curled edge of the reflecting surface 1 can enable generated current to flow along the curled edge and scatter at the edge of the curled edge, and the edge of the curled edge is arranged at the position opposite to the quiet zone, so that interference on signals of the quiet zone is avoided, and the accuracy and reliability of the test result of the compact range test are improved
In addition, the wave absorbing structure is arranged between the feed source 1 and the dead zone 3, and the wave absorbing structure is arranged because wave absorbing materials are used for effectively shielding the feed source at a proper position between the feed source and the dead zone in order to avoid the leakage of electromagnetic waves radiated by the feed source to a dead zone region, and the accuracy and reliability of the test result of the compact range test are improved in step .
In the description herein, reference to the terms " embodiments," " embodiments," "examples," "specific examples," or " examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least embodiments or examples of the invention.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (8)
1, a compact range-based phased array antenna test calibration system, comprising:
a reflective surface;
the feed source is arranged at the position of the curved surface focus of the reflecting surface;
the phased array antenna is arranged in a quiet zone of a compact range and comprises a substrate, wherein a plurality of vibrators which are arranged in an array mode are arranged on the substrate;
the switch is electrically connected with each vibrator and is used for switching the on-off of each vibrator;
the network analyzer is electrically connected with the feed source and used for outputting a test signal and receiving a signal received by the selector switch and the oscillator;
and the controller is also electrically connected with the network analyzer and used for controlling the network analyzer to output a test signal, receiving a receiving signal passing through the selector switch and the oscillator, and comparing the test signal with the receiving signal to obtain a phase difference and an amplitude difference.
2. The compact range-based phased array antenna test calibration system of claim 1,
the change-over switch is a mechanical switch or an electric control switch.
3. The compact range-based phased array antenna test calibration system of claim 2,
the reflecting surface, the feed source and the phased array antenna are positioned in a microwave darkroom.
4. The compact range-based phased array antenna test calibration system of claim 3,
and the inner wall of the microwave anechoic chamber is provided with a wave absorbing structure.
5. The compact range-based phased array antenna test calibration system of claim 4, further comprising:
a feed source position adjusting mechanism;
the feed source is connected with the feed source position adjusting mechanism.
6. The compact range-based phased array antenna test calibration system of claim 5,
the surface tolerance of the reflecting surface is 1/100 of the wavelength corresponding to the frequency of the test signal.
7. The compact range-based phased array antenna test calibration system of claim 6,
the edge of the reflecting surface is provided with a curled edge, and the curled edge faces to the direction opposite to the quiet zone.
8. The compact range-based phased array antenna test calibration system of claim 7,
and a wave absorbing structure is arranged between the feed source and the quiet zone.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921515908.0U CN210007708U (en) | 2019-09-12 | 2019-09-12 | Phased array antenna test calibration system based on compact field |
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| CN201921515908.0U CN210007708U (en) | 2019-09-12 | 2019-09-12 | Phased array antenna test calibration system based on compact field |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112034266A (en) * | 2020-05-25 | 2020-12-04 | 北京中测国宇科技有限公司 | Millimeter wave multi-feed source compact range testing system |
| CN113992278A (en) * | 2021-12-30 | 2022-01-28 | 上海莱天通信技术有限公司 | Calibration test method and device for reflective phased array antenna |
-
2019
- 2019-09-12 CN CN201921515908.0U patent/CN210007708U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112034266A (en) * | 2020-05-25 | 2020-12-04 | 北京中测国宇科技有限公司 | Millimeter wave multi-feed source compact range testing system |
| CN113992278A (en) * | 2021-12-30 | 2022-01-28 | 上海莱天通信技术有限公司 | Calibration test method and device for reflective phased array antenna |
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