CN205333746U - Frequency sweep measurement system based on diversity notion - Google Patents
Frequency sweep measurement system based on diversity notion Download PDFInfo
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- CN205333746U CN205333746U CN201521001826.6U CN201521001826U CN205333746U CN 205333746 U CN205333746 U CN 205333746U CN 201521001826 U CN201521001826 U CN 201521001826U CN 205333746 U CN205333746 U CN 205333746U
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Abstract
The utility model provides a frequency sweep measurement system based on diversity notion, this frequency sweep measurement system include: antenna, antenna measurement revolving stage and processing unit are surveyed to four port vector network analyzer, emit antenna, multiport, at least one output of four port vector network analyzer is connected with emit antenna, and the stream input end is connected the multiport and is surveyed the antenna, the multiport is surveyed the antenna and is set up on the antenna measurement revolving stage, processing unit and four port vector network analyzer and antenna measurement revolving stage are connected respectively, four port vector network analyzer pass through emit antenna to space radiation frequency sweep signal at least all the way, the multiport is surveyed receive port that the antenna includes two mutually orthogonals in order to receive the frequency sweep signal, obtains main polarization signal and polarization signal alternately, four port vector network analyzer are used for receiving main polarization signal and intersect polarization signal, processing unit acquires main polarization signal and alternately polarization signal's level, the turned angle of antenna measurement revolving stage, formation antenna directivity diagram and output.
Description
Technical field
This utility model relates to antenna measurement system, particularly relates to a kind of sweep-frequency measurement system based on diversity concept。
Background technology
At present, antenna measurement system generally has two kinds of composition forms, one is made up of synthesized source, transmitting antenna, tested antenna, radio-frequency (RF) switch, single channel joint and spectrum analyzer etc., its operation principle is: launched specific single-frequency point sine wave signal by transmitting antenna by synthesized source in space, after tested antenna receives the set specific frequency signal that transmitting antenna is launched, the input of spectrum analysis it is sent to through single channel joint, to realize the continuous Uninterrupted Sampling of electromagnetic wave signal in 360 ° of director spaces behind radio-frequency (RF) switch gating one tunnel。Owing to the working frequency range of communication antenna is generally wider, need the frequency measured a lot, therefore adopt the measurement system that spectrum signal source is set up because measuring inefficiency, generally only measure " high, medium and low " three frequencies, the parameters such as the measurement demand that antenna full frequency band uses, and amplitude and the phase place that can not simultaneously measure signal of the point-frequency measurement system of above-mentioned spectrum signal source establishment can not be met。
The another kind of composition form of antenna measurement system by: two-port net divides, transmitting antenna, tested antenna, radio-frequency (RF) switch, single channel joint etc. form, its operation principle is: a certain road output single channel swept-frequency signal in being divided by two-port net, and by transmitting antenna to space radiation swept-frequency signal, the signal received is sent to, through single channel joint, another road input that two-port net divides by tested antenna behind radio-frequency (RF) switch gating one tunnel, to realize the continuous Uninterrupted Sampling of electromagnetic wave signal in 360 ° of director spaces。But the measurement efficiency with the antenna measurement system of this composition form is general, it is little to expand upgrading space, generally applies to now in antenna measurement。
Utility model content
For solving above-mentioned technical problem, this utility model provides a kind of sweep-frequency measurement system based on diversity concept。
This utility model provides a kind of sweep-frequency measurement system based on diversity concept, and described sweep-frequency measurement system includes: four port vector network analyzers, transmitting antenna, the tested antenna of multiport, antenna measurement turntable and a processing unit；Wherein,
At least one outfan of described four port vector network analyzers is connected with described transmitting antenna, and two inputs connect the tested antenna of described multiport by being provided with the described antenna measurement turntable of dual pathways radio frequency rotary joint；The tested antenna of described multiport is arranged on described antenna measurement turntable；Described processing unit is connected respectively with described four port vector network analyzers and described antenna measurement turntable；
Described four port vector network analyzers by described transmitting antenna at least one road of space radiation swept-frequency signal；
The tested antenna of described multiport includes two mutually orthogonal receiving ports, is respectively used to receive described swept-frequency signal, obtains main polarization signal and cross-polarized signals；
Described four port vector network analyzers are used for receiving described main polarization signal and cross-polarized signals；
Described processing unit is for obtaining the rotational angle of the described level of main polarization signal, the level of cross-polarized signals and described antenna measurement turntable, and generates antenna radiation pattern according to the described level of main polarization signal, the level of cross-polarized signals and rotational angle and export。
In one embodiment, described transmitting antenna is single port single polarization transmitting antenna, described four port vector network analyzers by described single port single polarization transmitting antenna to space radiation one tunnel swept-frequency signal。
In one embodiment, two mutually orthogonal receiving ports respectively+45 ° of receiving ports of the tested antenna of described multiport and-45 ° of receiving ports。
In one embodiment, two mutually orthogonal receiving ports respectively vertical reception port of the tested antenna of described multiport and horizontal receiving port。
In one embodiment, described transmitting antenna is dual-port dual polarization transmitting antenna, described four port vector network analyzers by described dual-port dual polarization transmitting antenna to the mutually orthogonal swept-frequency signal of space radiation two-way。
In one embodiment, two emission ports respectively+45 ° of emission ports of described dual-port dual polarization transmitting antenna and-45 ° of emission ports, and two mutually orthogonal receiving ports respectively+45 ° of receiving ports of the tested antenna of described multiport and-45 ° of receiving ports。
In one embodiment, two emission ports respectively Vertical Launch port of dual-port dual polarization transmitting antenna and horizontal emission port, and two mutually orthogonal receiving ports respectively vertical reception port of the tested antenna of described multiport and horizontal receiving port。
In one embodiment, described antenna measurement turntable rotational angle range for 0 °～360 °。
In one embodiment, the tested antenna of described multiport is thrown radio frequency converting switch be connected with described dual pathways radio frequency rotary joint by a double-pole eight。
Tested antenna for every revolution in point-frequency measurement system can only measure a frequency, and the tested antenna for every revolution of multiport in the sweep-frequency measurement system that this utility model provides can complete n, and (n depends on the frequency point setting of Network Analyzer, be at least 101 frequencies) measurement, improve to a great extent measure also solve while efficiency spectrum signal source set up point-frequency measurement system can not measuring amplitude and phase place etc. are intrinsic simultaneously antenna measurement problem, improve means and the precision of measurement。Further, this utility model also has automaticity height, expands the advantage that upgrading space is big and applicable situation is wide。
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings。
Fig. 1 is this utility model embodiment schematic flow sheet based on the Frequency Sweeping Method of diversity concept；
Fig. 2 is the structural representation of this utility model embodiment sweep-frequency measurement system A；
Fig. 3 is another structural representation of this utility model embodiment sweep-frequency measurement system A；
Fig. 4 is the structural representation of this utility model another embodiment sweep-frequency measurement system B；
Fig. 5 is another structural representation of this utility model embodiment sweep-frequency measurement system B。
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is clearly and completely described, it is clear that described embodiment is only a part of embodiment of this utility model, rather than whole embodiments。Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of this utility model protection。
Fig. 1 is this utility model embodiment schematic flow sheet based on the Frequency Sweeping Method of diversity concept。As it is shown in figure 1, the Frequency Sweeping Method based on diversity concept that this utility model provides comprises the following steps:
Step 1, transmitting antenna receive at least one road swept-frequency signal, and to the above-mentioned swept-frequency signal of space radiation。
Step 2, have two mutually orthogonal receiving ports the tested antenna of multiport receive described swept-frequency signal, obtain main polarization signal and cross-polarized signals。
Step 3, the equipment that receives receive described main polarization signal, described cross-polarized signals。
Step 4, processing unit obtain the rotational angle of the level of described main polarization signal, the level of described cross-polarized signals and the tested antenna of described multiport, and the rotational angle according to the described level of main polarization signal, the level of cross-polarized signals and the tested antenna of multiport generates antenna radiation pattern and exports。
Compared to point-frequency measurement method, the measurement efficiency of the Frequency Sweeping Method based on diversity concept that this utility model provides is greatly improved, solve point-frequency measurement method can not antenna measurement problem that simultaneously measuring amplitude and phase place etc. are intrinsic, improve means and the precision of measurement。
In step 1, when transmitting antenna is single port single polarization transmitting antenna, this single port single polarization transmitting antenna is to space radiation one tunnel swept-frequency signal。
Normally, above-mentioned single port single polarization transmitting antenna radiates a road swept-frequency signal to space in linear polarization mode。Now, a receiving port (main polarization port with the tested antenna of multiport that the emission port of this single port single polarization transmitting antenna be arranged in parallel, namely identical with transmitting antenna polarization port) receive above-mentioned swept-frequency signal, obtain main polarization signal, another receiving port (cross polarization port of the tested antenna of multiport of the orthogonal setting of emission port with above-mentioned single port single polarization transmitting antenna, namely with the port of transmitting antenna polarization orthogonal) receive above-mentioned swept-frequency signal, obtain cross-polarized signals。Reception equipment obtains main polarization signal from main polarization port, obtains cross-polarized signals from cross polarization port。
In step 1, when transmitting antenna is dual-port dual polarization transmitting antenna, this dual-port dual polarization transmitting antenna receives two-way swept-frequency signal, and to the mutually orthogonal swept-frequency signal of space radiation two-way。
Now, one of them receiving port of the tested antenna of multiport receives the swept-frequency signal that the two-way of above-mentioned dual-port dual polarization transmitting antenna radiation is mutually orthogonal, obtains a main polarization signal in road, a road cross-polarized signals；
Another receiving port of the tested antenna of multiport receives the swept-frequency signal that the two-way of above-mentioned dual-port dual polarization transmitting antenna radiation is mutually orthogonal, obtains a main polarization signal in road, a road cross-polarized signals。Reception equipment receives the main polarization signal of above-mentioned two-way and two-way cross-polarized signals simultaneously。
Fig. 2 is the structural representation of this utility model embodiment sweep-frequency measurement system A。As in figure 2 it is shown, sweep-frequency measurement system A includes: the tested antenna 3 of four port vector network analyzers 1, transmitting antenna 2, multiport, antenna measurement turntable 4 and a processing unit 5。
At least one outfan of four port vector network analyzers 1 is connected with transmitting antenna 2, with by transmitting antenna 2 at least one road of space radiation swept-frequency signal。Fig. 2 illustrate only an outfan of four port vector network analyzers 1 and is connected with transmitting antenna 2, therefore can pass through transmitting antenna 2 to space radiation one tunnel swept-frequency signal, but this utility model is not limited thereto。
The tested antenna of multiport 3 includes two mutually orthogonal receiving ports, is respectively used to receive the road swept-frequency signal that transmitting antenna 2 sends, obtains main polarization signal and cross-polarized signals。
The tested antenna 3 of multiport is arranged on antenna measurement turntable 4, can be driven rotation by antenna measurement turntable 4。Antenna measurement turntable 4 is provided with dual pathways radio frequency rotary joint 6, and two inputs of four port vector network analyzers 1 are connected with the tested antenna 3 of multiport by dual pathways radio frequency rotary joint 6, are used for receiving above-mentioned main polarization signal and cross-polarized signals。
Processing unit 5 is connected respectively with four port vector network analyzers 1 and antenna measurement turntable 4, for obtaining the rotational angle of the above-mentioned level of main polarization signal, the level of cross-polarized signals and antenna measurement turntable 4, and generate antenna radiation pattern according to the above-mentioned level of main polarization signal, the level of cross-polarized signals and rotational angle and export。
When being embodied as, while the tested antenna 3 of multiport is driven rotation to turn around by antenna measurement turntable 4, four port vector network analyzers 1 receive the polarization characteristic measurement data of co polar signal and cross-polarized signals from the tested antenna 3 of multiport, thus realize the performance of two receiving ports with different polarization characteristic of the tested antenna of multiport 3 being detected simultaneously。
The twice that measurement efficiency is conventional one-channel sweep-frequency measurement system of the sweep-frequency measurement system that this utility model provides, is 2 × n times of early stage spectrum signal source point-frequency measurement system, measures efficiency higher。And, tested antenna for every revolution in point-frequency measurement system can only measure a frequency, and the tested antenna for every revolution in the sweep-frequency measurement system that this utility model provides can complete n, and (n depends on the frequency point setting of Network Analyzer, be at least 101 frequencies) measurement, improve measure also solve while efficiency the point-frequency measurement system set up in spectrum signal source can not measuring amplitude and phase place etc. are intrinsic simultaneously antenna measurement problem, improve means and the precision of measurement。It addition, this utility model also has automaticity height, expands the advantage that upgrading space is big and applicable situation is wide。
In one embodiment, transmitting antenna 2 is single port single polarization transmitting antenna, four port vector network analyzers 1 by this single port single polarization transmitting antenna to space radiation one tunnel swept-frequency signal。
In one embodiment, when the emission port of above-mentioned single port single polarization transmitting antenna is+45 ° of emission ports, during two mutually orthogonal receiving ports respectively+45 ° of receiving ports and-45 ° of receiving ports of the tested antenna of multiport 3, the signal that+45 ° of receiving ports receive is main polarization signal, and the signal that-45 ° of receiving ports receive is cross-polarized signals。
In like manner, when the emission port of above-mentioned single port single polarization transmitting antenna is-45 ° of emission ports, during two mutually orthogonal receiving ports respectively+45 ° of receiving ports and-45 ° of receiving ports of the tested antenna of multiport 3, the signal that+45 ° of receiving ports receive is cross-polarized signals, and the signal that-45 ° of receiving ports receive is main polarization signal。
In another embodiment, when the emission port of above-mentioned single port single polarization transmitting antenna is Vertical Launch port, during two mutually orthogonal receiving ports respectively vertical reception port and horizontal receiving port of the tested antenna of multiport 3, the signal that vertical reception port receives is main polarization signal, and the signal that horizontal receiving port receives is cross-polarized signals。
In like manner, when the emission port of above-mentioned single port single polarization transmitting antenna is horizontal emission port, during two mutually orthogonal receiving ports respectively vertical reception port and horizontal receiving port of the tested antenna of multiport 3, the signal that vertical reception port receives is cross-polarized signals, and the signal that horizontal receiving port receives is main polarization signal。
In one embodiment, antenna measurement turntable 4 rotational angle range for 0 °～360 °, it is possible to drive the tested antenna 3 of multiport rotate within the scope of 0 °～360 °。
In one embodiment, the tested antenna of multiport 3 is thrown radio frequency converting switch 7 by a double-pole eight and is connected with dual pathways radio frequency rotary joint 6。When being embodied as, the signal that the tested antenna 3 of multiport receives is thrown through double-pole eight and is sent four port vector network analyzers 1 after radio frequency converting switch 7 gating two-way to。
Fig. 3 is another structural representation of this utility model embodiment sweep-frequency measurement system A。With Fig. 2 the difference is that, in Fig. 3, the input of transmitting antenna 2 connects a transmitter 11, and transmitter sends a road swept-frequency signal, is radiated in space via transmitting antenna 2。Two receivers 12,14 are connected with the tested antenna 3 of multiport by dual pathways radio frequency rotary joint 6, are respectively used to receive main polarization signal and the cross-polarized signals that the tested antenna of above-mentioned multiport 3 obtains。
Processing unit 5 is connected respectively with receiver 12,14 and antenna measurement turntable 4, for obtaining the rotational angle of the above-mentioned level of main polarization signal, the level of cross-polarized signals and antenna measurement turntable 4, and generate antenna radiation pattern according to the above-mentioned level of main polarization signal, the level of cross-polarized signals and rotational angle and export。
Fig. 4 is the structural representation of this utility model another embodiment sweep-frequency measurement system B。As shown in Figure 4, with sweep-frequency measurement system A shown in Fig. 2 the difference is that, transmitting antenna in sweep-frequency measurement system B is dual-port dual polarization transmitting antenna 8, two outfans of four port vector network analyzers 1 are connected with two inputs of dual-port dual polarization transmitting antenna 8 respectively, by two orthogonal emission ports of dual-port dual polarization transmitting antenna 8 to the mutually orthogonal swept-frequency signal of space radiation two-way。
The tested antenna of multiport 3 includes two mutually orthogonal receiving ports, it is respectively used to receive the swept-frequency signal that dual-port dual polarization transmitting antenna 8 sends, each receiving port receives a main polarization signal in road and a road cross-polarized signals respectively, amounts to and obtains the main polarization signal of two-way and two-way cross-polarized signals。When being embodied as, the signal that the tested antenna 3 of multiport receives is thrown through double-pole eight and is sent four port vector network analyzers 1 after radio frequency converting switch 7 gating two-way to, and the double-pole eight of gating is thrown each path of radio frequency converting switch 7 and all transmitted a main polarization signal in road and a road cross-polarized signals。
In one embodiment, two emission ports respectively+45 ° of emission ports of above-mentioned dual-port dual polarization transmitting antenna 8 and-45 ° of emission ports, and two mutually orthogonal receiving ports respectively+45 ° of receiving ports of the tested antenna of multiport 3 and-45 ° of receiving ports。Now ,+45 ° of receiving ports are used for the mutually orthogonal signal receiving+45 ° of emission ports ,-45 ° of emission ports send, and respectively obtain a main polarization signal in road, a road cross-polarized signals；-45 ° of receiving ports are used for the mutually orthogonal signal receiving+45 ° of emission ports ,-45 ° of emission ports send, and respectively obtain a road cross-polarized signals, a main polarization signal in road。Therefore, the tested antenna of multiport 3 receives two-way cross-polarized signals and the main polarization signal of two-way altogether。
In another embodiment, two emission ports respectively Vertical Launch port of above-mentioned dual-port dual polarization transmitting antenna 8 and horizontal emission port, and two mutually orthogonal receiving ports respectively vertical reception port of the tested antenna of multiport 3 and horizontal receiving port。Now, vertical reception port is used for the mutually orthogonal signal receiving Vertical Launch port, horizontal emission port sends, and respectively obtains a main polarization signal in road, a road cross-polarized signals；Horizontal receiving port is used for the mutually orthogonal signal receiving Vertical Launch port, horizontal emission port sends, and respectively obtains a road cross-polarized signals, a main polarization signal in road。Therefore, the tested antenna of multiport 3 receives two-way cross-polarized signals and the main polarization signal of two-way altogether。
Two inputs of four port vector network analyzers 1 are connected with the tested antenna 3 of multiport by dual pathways radio frequency rotary joint 6, and each input receives a main polarization signal in road and a road cross-polarized signals。
Processing unit 5 obtains the rotational angle of the level of the main polarization signal of above-mentioned two-way, the level of two-way cross-polarized signals and antenna measurement turntable 4, and generates antenna radiation pattern according to the above-mentioned level of main polarization signal, the level of cross-polarized signals and rotational angle and export。
Fig. 5 is another structural representation of this utility model embodiment sweep-frequency measurement system B, with Fig. 4 the difference is that, two inputs of the dual-port dual polarization transmitting antenna 8 in Fig. 5 connect a transmitter 11,13 respectively, transmitter 11,13 sends a road swept-frequency signal respectively, via dual-port dual polarization transmitting antenna 8 to the mutually orthogonal swept-frequency signal of space radiation two-way。Two receivers 12,14 are connected with the tested antenna 3 of multiport by dual pathways radio frequency rotary joint 6, are respectively used to receive main polarization signal and the cross-polarized signals that the tested antenna of above-mentioned multiport 3 obtains。
Processing unit 5 is connected respectively with receiver 12,14 and antenna measurement turntable 4, for obtaining the rotational angle of the above-mentioned level of main polarization signal, the level of cross-polarized signals and antenna measurement turntable 4, and generate antenna radiation pattern according to the above-mentioned level of main polarization signal, the level of cross-polarized signals and rotational angle and export。
Measurement efficiency is conventional one-channel sweep-frequency measurement system 4 times of above-mentioned sweep-frequency measurement system B, are 4 × n times of early stage spectrum signal source point-frequency measurement system, measure efficiency and are greatly improved。
Applying specific embodiment in this utility model principle of the present utility model and embodiment are set forth, the explanation of above example is only intended to help to understand method of the present utility model and core concept thereof；Simultaneously for one of ordinary skill in the art, according to thought of the present utility model, all will change in specific embodiments and applications, in sum, this specification content should not be construed as restriction of the present utility model。
Claims (9)
1. the sweep-frequency measurement system based on diversity concept, it is characterised in that described sweep-frequency measurement system includes: four port vector network analyzers, transmitting antenna, the tested antenna of multiport, antenna measurement turntable and a processing unit；Wherein,
At least one outfan of described four port vector network analyzers is connected with described transmitting antenna, and two inputs connect the tested antenna of described multiport by being provided with the described antenna measurement turntable of dual pathways radio frequency rotary joint；The tested antenna of described multiport is arranged on described antenna measurement turntable；Described processing unit is connected respectively with described four port vector network analyzers and described antenna measurement turntable；
Described four port vector network analyzers by described transmitting antenna at least one road of space radiation swept-frequency signal；
The tested antenna of described multiport includes two mutually orthogonal receiving ports, is respectively used to receive described swept-frequency signal, obtains main polarization signal and cross-polarized signals；
Described four port vector network analyzers are used for receiving described main polarization signal and cross-polarized signals；
Described processing unit is for obtaining the rotational angle of the described level of main polarization signal, the level of cross-polarized signals and described antenna measurement turntable, and generates antenna radiation pattern according to the described level of main polarization signal, the level of cross-polarized signals and rotational angle and export。
2. sweep-frequency measurement system according to claim 1, it is characterised in that described transmitting antenna is single port single polarization transmitting antenna, described four port vector network analyzers by described single port single polarization transmitting antenna to space radiation one tunnel swept-frequency signal。
3. sweep-frequency measurement system according to claim 2, it is characterised in that two mutually orthogonal receiving ports respectively+45 ° of receiving ports of the tested antenna of described multiport and-45 ° of receiving ports。
4. sweep-frequency measurement system according to claim 2, it is characterised in that two mutually orthogonal receiving ports respectively vertical reception port of the tested antenna of described multiport and horizontal receiving port。
5. sweep-frequency measurement system according to claim 1, it is characterized in that, described transmitting antenna is dual-port dual polarization transmitting antenna, described four port vector network analyzers by described dual-port dual polarization transmitting antenna to the mutually orthogonal swept-frequency signal of space radiation two-way。
6. sweep-frequency measurement system according to claim 5, it is characterized in that, two emission ports respectively+45 ° of emission ports of described dual-port dual polarization transmitting antenna and-45 ° of emission ports, and two mutually orthogonal receiving ports respectively+45 ° of receiving ports of the tested antenna of described multiport and-45 ° of receiving ports。
7. sweep-frequency measurement system according to claim 5, it is characterized in that, two emission ports respectively Vertical Launch port of dual-port dual polarization transmitting antenna and horizontal emission port, and two mutually orthogonal receiving ports respectively vertical reception port of the tested antenna of described multiport and horizontal receiving port。
8. sweep-frequency measurement system according to claim 1, it is characterised in that described antenna measurement turntable rotational angle range for 0 °～360 °。
9. the sweep-frequency measurement system according to any one of claim 1-8, it is characterised in that the tested antenna of described multiport is thrown radio frequency converting switch by a double-pole eight and is connected with described dual pathways radio frequency rotary joint。
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| CN201521001826.6U CN205333746U (en) | 2015-12-07 | 2015-12-07 | Frequency sweep measurement system based on diversity notion |
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| CN201521001826.6U CN205333746U (en) | 2015-12-07 | 2015-12-07 | Frequency sweep measurement system based on diversity notion |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105353230A (en) * | 2015-12-07 | 2016-02-24 | 工业和信息化部电信研究院 | Frequency sweep measurement method and frequency sweep measurement system based on diversity concept |
| CN112180180A (en) * | 2020-08-27 | 2021-01-05 | 西安朗普达通信科技有限公司 | Multi-channel test method of multi-probe near-field OTA test system |
| CN112859076A (en) * | 2021-01-18 | 2021-05-28 | 西安电子科技大学 | RCS imaging measurement device and measurement method for low-scattering target |
| CN114047387A (en) * | 2021-11-04 | 2022-02-15 | 中国电子科技集团公司第二十九研究所 | System and method for testing radiation direction of electronic radiation system |
-
2015
- 2015-12-07 CN CN201521001826.6U patent/CN205333746U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105353230A (en) * | 2015-12-07 | 2016-02-24 | 工业和信息化部电信研究院 | Frequency sweep measurement method and frequency sweep measurement system based on diversity concept |
| CN105353230B (en) * | 2015-12-07 | 2018-11-02 | 中国信息通信研究院 | A kind of Frequency Sweeping Method and sweep-frequency measurement system based on diversity concept |
| CN112180180A (en) * | 2020-08-27 | 2021-01-05 | 西安朗普达通信科技有限公司 | Multi-channel test method of multi-probe near-field OTA test system |
| CN112859076A (en) * | 2021-01-18 | 2021-05-28 | 西安电子科技大学 | RCS imaging measurement device and measurement method for low-scattering target |
| CN114047387A (en) * | 2021-11-04 | 2022-02-15 | 中国电子科技集团公司第二十九研究所 | System and method for testing radiation direction of electronic radiation system |
| CN114047387B (en) * | 2021-11-04 | 2023-04-25 | 中国电子科技集团公司第二十九研究所 | System and method for testing radiation direction of electronic radiation system |
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