CN109301508A - It is a kind of for tightening the antenna assembly of field calibration - Google Patents
It is a kind of for tightening the antenna assembly of field calibration Download PDFInfo
- Publication number
- CN109301508A CN109301508A CN201811124218.2A CN201811124218A CN109301508A CN 109301508 A CN109301508 A CN 109301508A CN 201811124218 A CN201811124218 A CN 201811124218A CN 109301508 A CN109301508 A CN 109301508A
- Authority
- CN
- China
- Prior art keywords
- antenna
- 40ghz
- noise amplifier
- adjustment holes
- component
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The present invention disclose it is a kind of for tightening the antenna assembly of field calibration, including calibration frequency lower than 40GHz first antenna component and higher than the second antenna module of 40GHz；And the fixation kit of 40GHz low-noise amplifier below is installed；Wherein, arrangement is used for several adjustment holes of fixed antenna component on the fixation kit, several adjustment holes form the default arrangement of multiple assembly first antenna components and the second antenna module, so that two antenna modules can be alternatively assemblied on several adjustment holes to form one of them default arrangement.The installation of the antenna to different frequency and size is realized by the multiple groups adjustment hole of setting, to realize the cross-species transferability of antenna assembly.
Description
Technical field
The present invention relates to Electronic Testing Technology fields.More particularly, to a kind of for tightening the antenna assembly of field calibration.
Background technique
Compact Range is the abbreviation for tightening flat field, and English name is CATR (Compact Antenna Test
Range).Compact Range can provide the plane microwave test section an of function admirable in short distance, be to carry out various antenna spokes
Penetrate characteristic test and target RCS (english abbreviation of radar cross section, full name are Radar Cross-Section) testing research
Important experimental place.Compact Range has that ambient level is low, measurement accuracy is high, working frequency is wide, good confidentiality and round-the-clock etc.
Advantage is the key equipment for solving the problems, such as the radar invisibles such as aircraft, guided missile, satellite and antenna.
By calibrating to Compact Range, whether the quiet zone performance that can grasp Compact Range test macro meets test index
It is required that the uncertainty of measurement that can be introduced for analysis measurement result provides real data, accurate Compact Range laboratory can be commented
Valence provides help；And by regularly Compact Range performance calibration, Compact Range test macro performance can be monitored, there is effect
The measuring technique ability for demonstrate,proving each Compact Range laboratory, can also identify each Compact Range laboratory of discovery there are the problem of, so as to
To take corrective action, higher confidence level is provided to the client in laboratory, to guarantee antenna used in weapon model, antenna
Cover and target RCS test result it is accurate.
Antenna receives probe as tight, and the accuracy for affecting calibration to a certain extent is accurately positioned.At present both at home and abroad
There is the experience for carrying out Compact Range performance detection, but use environment due to each Construction Party and system building are different, and
The device that receiving antenna component when frequency is lower than 40GHz and higher than 40GHz includes differs widely, and needs to carry out respectively
Design, while receiving antenna is divided into ten several types by frequency range, for convenience of using, needs to be designed in versatility.
Summary of the invention
In order to solve the above problem at least one, the present invention adopt the following technical solutions:
It is a kind of for tightening the antenna assembly of field calibration, comprising:
First antenna component of the calibration frequency lower than 40GHz and the second antenna module higher than 40GHz；
And the fixation kit of 40GHz low-noise amplifier below is installed；
Wherein, several adjustment holes of the arrangement for fixed antenna component, several adjustment hole shapes on the fixation kit
At the default arrangement of multiple assembly first antenna components and the second antenna module, so that two antenna modules can be alternatively assemblied in
It is formed on several adjustment holes of one of them default arrangement.
Preferably, the first antenna component calibration frequency range is 0.75GHz to 40GHz；Second antenna module
Calibration frequency range is 40GHz to 110GHz.
Preferably, the component of installation absorbing material is provided with around the antenna.
Preferably, the fixed device includes the two flat flanges to be linked together by several connecting columns, institute
It states low-noise amplifier to be fixed between two adjacent connecting columns, and is gripped by two flanges, several adjustings
Hole is located in one of on flange.
Preferably, the first antenna component includes:
Calibration frequency is higher than the first antenna of 40GHz；
One end is connected to several connecting columns in the first antenna；
Connect the first antenna flange of several connecting column other ends；
Wherein, the first antenna flange is mounted on several adjustment holes to form the first default arrangement.
Preferably, second antenna module includes:
Calibration frequency is higher than the second antenna of 40GHz；
One end is connected to the connection component on second antenna；
Connect the second antenna flange of the connection component other end；
Wherein, the second antenna flange is mounted on several adjustment holes to form the first default arrangement.
Preferably, second antenna module further comprises:
Surround the shielding cylinder of the connection component.
Preferably, the connection component includes:
The low-noise amplifier cushion block being connect with the second antenna；
The straight wave guide being connected on the low-noise amplifier cushion block；
Cooperate the first waveguide bend being connected to the straight wave guide；
40GHz or more the low-noise amplifier being fixedly connected with first waveguide bend；
The second waveguide bend being connected on 40GHz or more the low-noise amplifier；And
The shell of the frequency mixer and the fixed frequency mixer that are connect with second waveguide bend；
The shell is mounted on the second antenna flange.
Preferably, the connection component further comprises:
Power module for powering to 40GHz or more the low-noise amplifier.
Preferably, it is described it is default arrangement include there are three.
Beneficial effects of the present invention are as follows:
The present invention provides a kind of for tightening the antenna assembly of field calibration, and the receiving antenna component that the present invention designs is divided into
40GHz or less and 40GHz both the above form, and fixation kit is devised for fixing the antenna of two kinds of different frequency sections
Component, since 40GHz antenna module below all has more than ten kinds of different structure types, even the antenna of 40GHz or more
Component also has a variety of different structure types, and therefore, the present invention on the face of fixation kit by being equipped with out several groups
Adjustment hole, several adjustment holes form the default arrangement of multiple assembly antenna modules, so that two antenna modules can be alternatively
It is assemblied on several adjustment holes to form one of them default arrangement, fixation kit can install the day of fixed different frequency size
Line component realizes the cross-species transferability of antenna assembly, can adapt to the antenna module of tens of kinds of different structure types.
Detailed description of the invention
Specific embodiments of the present invention will be described in further detail with reference to the accompanying drawing.
Fig. 1 shows one of 40GHz or less antenna module isometric view in the embodiment of the present invention.
Fig. 2 shows two of 40GHz or less the antenna module isometric view in the embodiment of the present invention.
Fig. 3 shows the low-noise amplifier flange assembly isometric view in the embodiment of the present invention.
Fig. 4 shows one of 40GHz or more antenna module isometric view in the embodiment of the present invention.
Fig. 5 shows two of 40GHz or more the antenna module isometric view in the embodiment of the present invention.
Fig. 6 shows isometric view inside 40GHz or more the antenna module in the embodiment of the present invention.
Specific embodiment
In order to illustrate more clearly of the present invention, the present invention is done further below with reference to preferred embodiments and drawings
It is bright.Similar component is indicated in attached drawing with identical appended drawing reference.It will be appreciated by those skilled in the art that institute is specific below
The content of description is illustrative and be not restrictive, and should not be limited the scope of the invention with this.
In view of frequency differs widely lower than 40GHz and the device for including higher than the receiving antenna component in the case of 40GHz,
And frequency is lower than 40GHz and the receiving antenna higher than 40GHz is further divided into ten several types by frequency range, for convenience of using,
Reach the versatility purpose of device, the present invention provides a kind of for tightening the antenna assembly of field calibration, which includes
First antenna component of the calibration frequency lower than 40GHz and the second antenna module higher than 40GHz；And 40GHz or less is installed
Low-noise amplifier fixation kit；Wherein, several adjustment holes of the arrangement for fixed antenna component on the fixation kit,
Several adjustment holes form the default arrangement of multiple assembly first antenna components and the second antenna module, thus two antenna sets
Part can be alternatively assemblied on several adjustment holes to form one of them default arrangement.
The present invention provides a kind of for tightening the antenna assembly of field calibration, and the receiving antenna component that the present invention designs is divided into
40GHz or less and 40GHz both the above form, and fixation kit is devised for fixing the antenna sets of two kinds of different frequencies
Part, several groups adjustment hole is equipped with out on the face of fixation kit, and several adjustment holes form multiple assembly antenna modules
Default arrangement, so that two antenna modules can be alternatively assemblied on several adjustment holes to form one of them default arrangement, Gu
The antenna module of fixed different frequency size can be installed by determining component, realize the cross-species transferability of antenna assembly.
It is described in detail below with reference to Fig. 1-Fig. 6.
Antenna assembly includes the first antenna component 25 lower than 40GHz and the second antenna module 9 higher than 40GHz and peace
Fixation kit 23 equipped with 40GHz low-noise amplifier below；Wherein, arrangement is used for fixed antenna on the fixation kit 23
Several adjustment holes 31 of component, several adjustment holes form multiple assembly first antenna components 25 and second antenna module 9
Default arrangement, so that two antenna modules can be alternatively assemblied on several adjustment holes to form one of them default arrangement.Its
Middle 25 calibration frequency range of first antenna component is 0.75GHz to 40GHz；Second antenna module, 9 calibration frequency range is 40GHz
To 110GHz.
Fixation kit 23 includes front port flange 5, and several adjustment holes 31 are provided on front port flange 5, are used for
Fixed various sizes of antenna module.And rear interface flange 7, two flanges are linked together by connecting column 6, two connections
It is further fixed on low-noise amplifier 8 between column 6, and is gripped by front port flange 5 and rear interface flange 7.
First antenna component 25 includes the first antenna 251 that calibration frequency is lower than 40GHz, is equipped in first antenna 251
Connecting column 3, the other end of connecting column 3 are first antenna flanges 4, and first antenna flange 4 passes through connecting column 3 and first antenna 251
Connection, first antenna flange 4 are mounted on the front port flange 5 of fixed establishment 23.The size of first antenna flange 4 is different,
Disk size different several adjustment holes 31 to adapt to the arrangement on front port flange 5 therewith, realize that a fixation kit 23 can
To install multiple and different antenna modules.
Second antenna module 9 includes the second antenna 91 that calibration frequency is higher than 40GHz, is equipped with connection in first antenna 91
Component 11, connection component 11 are mounted on the back shroud 13 on the second antenna flange 26, and back shroud 13 is by connecting column 12 with after
Interface flange 7 connects, and also has several adjustment holes 31 on back shroud 13.
Connection component 11 includes shielding cylinder 27, and shielding cylinder 27 surrounds the connection component 11.Include inside connection component 11
The low-noise amplifier cushion block 16 being connect with the second antenna 91；And straight wave guide 28, straight wave guide 28 are connected to the low noise and put
On big device cushion block 16；First waveguide bend 18 is connected to the straight wave guide 28 cooperation；First waveguide bend 18 be fixedly connected 40GHz with
Upper low-noise amplifier 17, the second waveguide bend 29 are connected on 40GHz or more low-noise amplifier 17；Second waveguide bend 29 and company
Then the shell 30 of frequency mixer and the fixed frequency mixer；The shell 30 is mounted on the back shroud 13.Joined assemblies 11 are also
It include the power module 21 of 40GHz or more low-noise amplifier power supply for powering.
In first antenna component 25, wave absorbing assembly 2 is fixed on antenna middle section by the screw of 3 front end of connecting column, can drop
Influence of the low antenna module rear portion to field calibration is tightened.In second antenna module 9, wave absorbing assembly 2 is fixed on 91 He of the second antenna
Influence between connection component 11, for reducing antenna module rear portion to field calibration is tightened.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention may be used also on the basis of the above description for those of ordinary skill in the art
To make other variations or changes in different ways, all embodiments can not be exhaustive here, it is all to belong to this hair
The obvious changes or variations that bright technical solution is extended out are still in the scope of protection of the present invention.
Claims (10)
1. a kind of for tightening the antenna assembly of field calibration characterized by comprising
First antenna component of the calibration frequency lower than 40GHz and the second antenna module higher than 40GHz；And 40GHz is installed
The fixation kit of low-noise amplifier below；
Wherein, several adjustment holes of the arrangement for fixed antenna component on the fixation kit, several adjustment holes form more
The default arrangement of a assembly first antenna component and the second antenna module, so that two antenna modules alternatively can be assemblied in be formed
On several adjustment holes of one of them default arrangement.
2. the apparatus according to claim 1, which is characterized in that the first antenna component calibration frequency range is
0.75GHz to 40GHz；The second antenna module calibration frequency range is 40GHz to 110GHz.
3. the apparatus according to claim 1, which is characterized in that be provided with the group of installation absorbing material around the antenna
Part.
4. the apparatus according to claim 1, which is characterized in that the fixation kit includes being connected to by several connecting columns
Two flat flanges together, the low-noise amplifier are fixed between two adjacent connecting columns, and pass through two
Flange grips, and several adjustment holes are located in one of on flange.
5. the apparatus according to claim 1, which is characterized in that the first antenna component includes:
Calibration frequency is lower than the first antenna of 40GHz；
One end is connected to several connecting columns in the first antenna；
Connect the first antenna flange of several connecting column other ends；
Wherein, the first antenna flange is mounted on several adjustment holes to form the first default arrangement.
6. the apparatus according to claim 1, which is characterized in that second antenna module includes:
Calibration frequency is higher than the second antenna of 40GHz；
One end is connected to the connection component on second antenna；
Connect the second antenna flange of the connection component other end；
Wherein, the second antenna flange is mounted on several adjustment holes to form the first default arrangement.
7. device according to claim 6, which is characterized in that second antenna module further comprises:
Surround the shielding cylinder of the connection component.
8. device according to claim 6, which is characterized in that the connection component includes:
The low-noise amplifier cushion block being connect with the second antenna；
The straight wave guide being connected on the low-noise amplifier cushion block；
Cooperate the first waveguide bend being connected to the straight wave guide；
40GHz or more the low-noise amplifier being fixedly connected with first waveguide bend；
The second waveguide bend being connected on 40GHz or more the low-noise amplifier；And
The shell of the frequency mixer and the fixed frequency mixer that are connect with second waveguide bend；
The shell is mounted on the second antenna flange.
9. device according to claim 8, which is characterized in that the connection component further comprises:
Power module for powering to 40GHz or more the low-noise amplifier.
10. the apparatus according to claim 1, there are three the default arrangement includes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811124218.2A CN109301508B (en) | 2018-09-26 | 2018-09-26 | Antenna device for compact field calibration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811124218.2A CN109301508B (en) | 2018-09-26 | 2018-09-26 | Antenna device for compact field calibration |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109301508A true CN109301508A (en) | 2019-02-01 |
| CN109301508B CN109301508B (en) | 2021-04-02 |
Family
ID=65164059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811124218.2A Active CN109301508B (en) | 2018-09-26 | 2018-09-26 | Antenna device for compact field calibration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109301508B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110611168A (en) * | 2019-09-21 | 2019-12-24 | 孙凤山 | Multi-antenna calibration device for 5G communication |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004097977A1 (en) * | 2003-04-26 | 2004-11-11 | Sony Ericsson Mobile Communications Ab | Antenna device for communication equipment |
| CN101217213A (en) * | 2007-12-26 | 2008-07-09 | 蒋小平 | An upper laid aerial device of automobile |
| CN101404508A (en) * | 2008-10-15 | 2009-04-08 | 北京航空航天大学 | Compact range feed source suitable for indoor ultra-broadband wireless communication frequency band |
| CN101505006A (en) * | 2009-02-24 | 2009-08-12 | 中国航天科技集团公司第五研究院第五○四研究所 | Feeding source structure shared by sub-reflector and feeding source, and dual frequency band antenna constructed thereby |
| EP2146392A2 (en) * | 2008-07-16 | 2010-01-20 | R.A. Miller Industries, INC. | Marine multiband antenna |
| CN102904024A (en) * | 2012-10-24 | 2013-01-30 | 武汉大学 | Double-frequency transmitting monopole antenna for portable high-frequency ground wave radar |
| WO2013142807A1 (en) * | 2012-03-22 | 2013-09-26 | Northeastern University | Conformal and configurable millimeter-wave integrated array radar in a compact package |
| US20140361077A1 (en) * | 2012-03-12 | 2014-12-11 | Bar Code Specialties, Inc. (Dba Bcs Solutions) | Rail-mounted robotic inventory system |
| CN104466345A (en) * | 2014-11-28 | 2015-03-25 | 北京无线电计量测试研究所 | Antenna, low noise amplifier and frequency mixer connection mechanism |
| CN204302315U (en) * | 2014-12-17 | 2015-04-29 | 协同通信技术有限公司 | Satellite antenna testing device |
| CN105680158A (en) * | 2016-01-04 | 2016-06-15 | 北京航空航天大学 | Feed network-based low-frequency compact range feed source |
| CN106207370A (en) * | 2016-08-19 | 2016-12-07 | 西安空间无线电技术研究所 | A kind of reflector antenna adjusts positioner and method |
| CN205863410U (en) * | 2016-08-11 | 2017-01-04 | 成都雷电微力科技有限公司 | A kind of multifrequency Shared aperture is combined phased array antenna structure |
| US20180040939A1 (en) * | 2014-09-29 | 2018-02-08 | Rfmicron, Inc. | RADIO FREQUENCY IDENTIFICATION (RFID) TAG(S) and SENSOR(S) |
-
2018
- 2018-09-26 CN CN201811124218.2A patent/CN109301508B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004097977A1 (en) * | 2003-04-26 | 2004-11-11 | Sony Ericsson Mobile Communications Ab | Antenna device for communication equipment |
| CN101217213A (en) * | 2007-12-26 | 2008-07-09 | 蒋小平 | An upper laid aerial device of automobile |
| EP2146392A2 (en) * | 2008-07-16 | 2010-01-20 | R.A. Miller Industries, INC. | Marine multiband antenna |
| CN101404508A (en) * | 2008-10-15 | 2009-04-08 | 北京航空航天大学 | Compact range feed source suitable for indoor ultra-broadband wireless communication frequency band |
| CN101505006A (en) * | 2009-02-24 | 2009-08-12 | 中国航天科技集团公司第五研究院第五○四研究所 | Feeding source structure shared by sub-reflector and feeding source, and dual frequency band antenna constructed thereby |
| US20140361077A1 (en) * | 2012-03-12 | 2014-12-11 | Bar Code Specialties, Inc. (Dba Bcs Solutions) | Rail-mounted robotic inventory system |
| WO2013142807A1 (en) * | 2012-03-22 | 2013-09-26 | Northeastern University | Conformal and configurable millimeter-wave integrated array radar in a compact package |
| CN102904024A (en) * | 2012-10-24 | 2013-01-30 | 武汉大学 | Double-frequency transmitting monopole antenna for portable high-frequency ground wave radar |
| US20180040939A1 (en) * | 2014-09-29 | 2018-02-08 | Rfmicron, Inc. | RADIO FREQUENCY IDENTIFICATION (RFID) TAG(S) and SENSOR(S) |
| CN104466345A (en) * | 2014-11-28 | 2015-03-25 | 北京无线电计量测试研究所 | Antenna, low noise amplifier and frequency mixer connection mechanism |
| CN204302315U (en) * | 2014-12-17 | 2015-04-29 | 协同通信技术有限公司 | Satellite antenna testing device |
| CN105680158A (en) * | 2016-01-04 | 2016-06-15 | 北京航空航天大学 | Feed network-based low-frequency compact range feed source |
| CN205863410U (en) * | 2016-08-11 | 2017-01-04 | 成都雷电微力科技有限公司 | A kind of multifrequency Shared aperture is combined phased array antenna structure |
| CN106207370A (en) * | 2016-08-19 | 2016-12-07 | 西安空间无线电技术研究所 | A kind of reflector antenna adjusts positioner and method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110611168A (en) * | 2019-09-21 | 2019-12-24 | 孙凤山 | Multi-antenna calibration device for 5G communication |
| CN110611168B (en) * | 2019-09-21 | 2020-11-20 | 深圳市锦凌电子有限公司 | Multi-antenna calibration device for 5G communication |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109301508B (en) | 2021-04-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100392379C (en) | Measuring method for reflectivity of microwave absorption material | |
| CN101995520B (en) | Antenna testing device and antenna testing method | |
| CN106199287B (en) | A kind of material electric field shielding effect test system and method based on rectangular waveguide | |
| CN113419114B (en) | Miniaturized broadband electromagnetic shielding testing device and testing method | |
| CN107748307B (en) | A kind of high power millimeter wave mode real-time analyzer | |
| CN109116124B (en) | Movable multi-output electromagnetic shielding effectiveness testing device | |
| CN109301508A (en) | It is a kind of for tightening the antenna assembly of field calibration | |
| CN106019014A (en) | Test system and test method for concentrated attenuator for folded waveguide traveling wave tube | |
| CN106597106A (en) | Standing wave coefficient testing device and method of output port in working state of travelling wave tube | |
| Gifuni et al. | Latest developments on the shielding effectiveness measurements of materials and gaskets in reverberation chambers | |
| Michelsen et al. | Fast ion millimeter wave collective Thomson scattering diagnostics on TEXTOR and ASDEX upgrades | |
| Dřínovský et al. | Electromagnetic shielding efficiency measurement of composite materials | |
| CN108199790A (en) | The waveguide test system and test method of a kind of passive intermodulation of metal net performance | |
| Regmi | Reflection measurement of building materials at microwaves | |
| CN114698218A (en) | Seven-channel microwave interferometer measuring method for transient plasma electron density distribution | |
| CN201536156U (en) | Electromagnetic shielding efficiency test device of small shielding body and radio-frequency antenna and dot frequency radiation source therein | |
| CN209387884U (en) | The test device of shielding property | |
| CN207662970U (en) | A kind of beam shield performance test fixture and test system | |
| Scheps | Shielding effectiveness measurements using a dual-TEM cell fixture | |
| Muguira et al. | A configurable electronics system for the ESS-Bilbao beam position monitors | |
| Jakubowski | A study on the calibration of an HPM meter based on a D-dot sensor and logarithmic RF power detector | |
| Zhen-qiang et al. | Research on Receiver Anti-RFI of Delingha 13.7 m Telescope | |
| Moradmand et al. | Utilizing FM and TV Transmitters for Characterizing Shielded Enclosures | |
| CN202916359U (en) | Radio frequency leakage test device | |
| CN207408498U (en) | Antenna passive cross modulation test darkroom |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |