CN208255316U - The shield effectiveness test macro of small-sized shielding cavity - Google Patents
The shield effectiveness test macro of small-sized shielding cavity Download PDFInfo
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- CN208255316U CN208255316U CN201820371440.1U CN201820371440U CN208255316U CN 208255316 U CN208255316 U CN 208255316U CN 201820371440 U CN201820371440 U CN 201820371440U CN 208255316 U CN208255316 U CN 208255316U
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Abstract
A kind of shield effectiveness test macro the utility model discloses small-sized shielding cavity includes a plurality of types of signal transmitting antennas and signal receiving antenna, solves the problems, such as the condition deficiency that existing test macro is examined towards small-sized cavity shielding properties, have small in size, it is high to test dynamic range, built-in power supply, it is convenient for carrying, covering frequence range is wide, the test conditions such as autorun, electronic electric equipment can be achieved at the same time, the compact electromagnetic protective casing test that weaponry etc. uses, and shielding cabinet, shield the large-scale shield shell test function such as computer room, compensate for small-sized shielding cavity broadband, the deficiency of the protective performance curriculum test means of high target.
Description
Technical field
The utility model relates to signal testing technology more particularly to a kind of shield effectiveness test macro of small-sized shielding cavity,
The equipment such as the compact electromagnetic protective casing that is used suitable for electronic electric equipment, weaponry etc. and shielding cabinet, shielding computer room,
The signal shielding effect test of facility and other similar closed shield chambers.
Background technique
Existing shielding cavity shield effectiveness test equipment on the market, generally has the disadvantages that
1, signal emitting-source volume is big, is unable to satisfy the volume requirement of small-sized shielding cavity test, and general, commercial volume
Small signal source is unable to satisfy shield effectiveness examination demand in terms of peak power output and output power range again.
2, traditional test macro, it will usually have outside power supply line or RF cable access shielding cavity, cannot achieve small-sized
The full-shield effect test of shielding cavity, influences test accuracy；It is often difficult to place standard size day in small-sized shielding cavity simultaneously
Line；General signal source needs Alternating Current Power Supply to work, and outside, which introduces power supply line, will affect the sealing effect of shielding cavity, brings test
Error.
3, the antenna that the field is tested at present commonly used in shield effectiveness is mostly narrow-band antenna, is needed in test process frequently
Replace antenna, trivial operations.
4, test operation is usually manual test and manually carries out data record.
Utility model content
The utility model provides a kind of shield effectiveness test macro of small-sized shielding cavity, to solve existing shielding cavity shielding
The narrow defect of effect test equipment test frequency range.
The utility model is achieved by the following technical solution:
A kind of shield effectiveness test macro of small-sized shielding cavity, including signal emission part, signal receiving part divide and control
Part；
The signal emission part includes signal transmitting antenna and the signal generator for being built-in with supplying cell, the signal
Generator connects the signal transmitting antenna, for passing through the signal transmitting antenna transmission of electromagnetic signals；
The signal receiving part point includes signal receiver and signal receiving antenna, and the signal receiver connects the letter
Number receiving antenna, for receiving the electromagnetic signal, and the electromagnetic signal progress to receiving by the signal receiving antenna
Power detection；
The signal transmitting antenna and the signal receiving antenna include four kinds: magnetic loop antenna, biconical antenna, dipole
Antenna and electromagnetic horn；
The system carries out shield effectiveness test using the signal transmitting antenna and signal receiving antenna of identical type；
The control section includes program-controlled host, the program-controlled host and the signal generator and the signal receiver
Network connection.
Further, the signal generator generally cuboid, length is respectively 308 millimeters, 260 millimeters,
90 millimeters.
Further, the signal generator has 1 signal output channels.
Further, the size of the magnetic loop antenna is 230mm*190mm*80mm, and the size of the biconical antenna is
The size of 330mm*130mm*540mm, the dipole antenna are 90mm*50mm*4mm, and the electromagnetic horn is in working frequency
When for 1GHz-18GHz, having a size of 345mm*98mm*69mm, when working frequency is 18GHz-26.5GHz, having a size of 125mm*
55mm*42mm, when working frequency is 26.5GHz-40GHz, having a size of 100mm*36mm*28mm.
Further, the signal transmitting antenna is passive antenna.
Further, when the signal transmitting antenna and the signal receiving antenna are magnetic loop antenna, the signal is connect
Receipts machine further includes built-in amplifier, and the signal emission part is arranged in shielding cavity to be tested, the signal receiving antenna
The signal receiver is connected by coaxial cable.
Further, when the signal transmitting antenna and the signal receiving antenna be biconical antenna, dipole antenna or
When electromagnetic horn, the signal receiving part point further includes coaxial cable, and the signal receiving antenna is connected by the coaxial cable
The signal receiver is connect, the signal emission part is arranged in shielding cavity to be tested.
Further, frequency synthesizer is provided in the signal generator, the frequency synthesizer includes Direct Digital
Frequency synthesizer and the phaselocked loop being connect with the digital frequency synthesizer.
Further, LAN interface and optical interface are provided on the signal generator.
Compared with prior art, the shield effectiveness test macro of small-sized shielding cavity provided by the utility model includes multiple types
The signal transmitting antenna and signal receiving antenna of type solve the item that existing test macro is examined towards small-sized cavity shielding properties
Part deficiency problem, have small in size, test dynamic range is high, it is built-in power, be convenient for carrying, covering frequence range it is wide, automatic
The test conditions such as test function can be achieved at the same time the compact electromagnetic protective casing that electronic electric equipment, weaponry etc. use and survey
Examination, and shielding cabinet, the large-scale shield shell test function of shielding computer room etc. compensate for small-sized shielding cavity broadband, high target
The deficiency of protective performance curriculum test means.
Detailed description of the invention
Fig. 1 is the theory of constitution schematic diagram of the shield effectiveness test macro of small-sized shielding cavity provided by the utility model；
Fig. 2 is magnetic loop antenna structural schematic diagram；
Fig. 3 is biconical antenna structural schematic diagram；
Fig. 4 is dipole antenna configuration schematic diagram；
Fig. 5 is electromagnetic horn structural schematic diagram；
Fig. 6 is test environmental structure schematic diagram when being tested using the test macro small-sized shielding cavity.
Specific embodiment
For the purpose of this utility model, technical solution and advantage is more clearly understood, below with reference to embodiment and attached drawing,
The utility model is described in further detail.
In conjunction with shown in Fig. 1 to Fig. 6, the shield effectiveness test macro of small-sized shielding cavity provided by the utility model, including letter
Number emitting portion and signal receiving part point.
Signal emission part includes signal transmitting antenna 2 and the signal generator 1 for being built-in with supplying cell, signal generator
1 connection signal transmitting antenna 2, for passing through 2 transmission of electromagnetic signals of signal transmitting antenna.
Signal receiving part point includes signal receiver 4 and signal receiving antenna 3, and 4 connection signal of signal receiver receives day
Line 3 for receiving electromagnetic signal by signal receiving antenna 3, and carries out power detection to the electromagnetic signal received.
Signal transmitting antenna 2 and signal receiving antenna 3 include four kinds: magnetic loop antenna, biconical antenna, dipole antenna and
Electromagnetic horn.System carries out shield effectiveness test using the signal transmitting antenna 2 and signal receiving antenna 3 of identical type.
The size of magnetic loop antenna is 230mm*190mm*80mm, and maximum operation frequency only has up to 50MHz, weight
350g, it is light small and exquisite.Biconical antenna maximum operation frequency is up to 1GHz, having a size of 330mm * 130mm*540mm, gain is
0.5dBi.Dipole antenna maximum operation frequency is very small and exquisite having a size of 90mm*50mm*4mm up to 2GHz, compares same type
Small product size is about small by 20% or more, gain 2.2dBi.Electromagnetic horn and signal frequency range have corresponding relationship, hereinafter in detail
It states.Also settable bracket on signal transmitting antenna 2 and signal receiving antenna 3, is convenient for carrying and field testing.
Signal generator 1 is 9kHz to 40GHz using customization signal source, output signal frequency range, passes through above-mentioned four kinds
The signal transmitting antenna 2 and signal receiving antenna 3 of type can cover said frequencies range.Signal transmitting antenna 2 is passive antenna,
Its object is to reduce antenna size, enables the system to test smaller shielding cavity 6, be connected with signal receiver 4
Signal receiving antenna 3 equally select the antenna of optimization design to increase system dynamic model its object is to improve system sensitivity
It encloses.Using the small and exquisite contracting of size than antenna, while guaranteeing higher antenna gain and efficiency, improves the whole of test macro and survey
Try sensitivity.The output power of the signal generator 1 is up to+30dBm (1W), and shield effectiveness test dynamic range is big, has good
Good heat sinking function, for a long time using not influencing output power index.The generally cuboid of signal generator 1, length and width,
Height is respectively 308 millimeters, 260 millimeters, 90 millimeters, and system tests the shielding cavity 6 of smaller volume.Moreover, its
Weight only has 5.2Kg.Meanwhile 1 shell of signal generator is equipped with handle, is convenient for carrying.There are two frequencies for tool in signal generator 1
The signal source of section is one of to generate 9KHz-26.5GHz frequency signal, another generates 26.5-40GHz frequency signal, can survey
Smaller shielding cavity 6 is tried to the shield effectiveness of signal.Meanwhile the supplying cell capacity built in the signal generator 1 is
20000mAh, primary fully charged 2-3 hours usable, supplying cell is standard model battery product, and compact is easily changed.
The charging voltage of supplying cell is 12V-24V, and charging times are greater than 2000 times, the charging time about 10 hours, facilitates outdoor test.
In addition, the signal generator 1 has 1 signal output channels, the reachable+30dBm of full frequency band power output.In addition to These parameters,
1 interface of signal generator is 50 Ω, can be directly connected to RF cable, versatile, which will not when unloaded
Radiation hazradial bundle is generated to personnel, it is highly-safe.
Detailed process is as follows for the shield effectiveness test of small-sized shielding cavity 6:
(1) according to test frequency needs, test environmental structure is carried out according to Fig. 6,2 He of signal transmitting antenna in Fig. 6
Signal receiving antenna 3 can need to select the antenna of respective type according to test, such as magnetic loop antenna, biconical antenna, dipole antenna
Or electromagnetic horn.
(2) shielding cavity 6 to be measured is placed on test desk 8, the signal of signal generator 1 and corresponding test frequency range is emitted
Antenna 2 and its antenna holder 7 are placed in the position of system testing requirement.Signal transmitting antenna 2 and its antenna holder 7 are arranged in shielding cavity
In 6, shielding cavity 6 is grounded.
(3) frequency spectrograph (i.e. signal receiver 4) is placed on neighbouring test desk 8, and the letter of corresponding test frequency range
Number receiving antenna 3 and its antenna holder 7 are placed in the position of system testing requirement.
(4) in placement process, should be noted signal transmitting antenna 2 and shielding cavity 6 relative position and signal receiving antenna 3 with
The relative position of shielding cavity 6.
(5) start testing and control terminal, set the state of signal generator 1, signal generator 1 exports a continuous wave
Signal, the signal magnitude received by frequency spectrograph (i.e. signal receiver 4) detection, the position of fine adjustment signal receiving antenna 3, directly
To the peak signal position finding signal receiving antenna 3 and capable of receiving, it can guarantee that signal transmitting antenna 2 and signal receive day at this time
Line 3 is in the same horizontal position.
(6) by controlling terminal, control signal generator 1 exports the signal of test frequency and amplitude, (i.e. by frequency spectrograph
Signal receiver 4) distinguish transmission power A of the measuring signal generator 1 by when the shielding of shielding cavity 6 and not by the shielding of shielding cavity 6 when
And B.
(7) system controlling terminal can carry out calculating the difference of A and B automatically, which is the signal of shielding cavity 6 to be measured
Shield effectiveness.
(8) system controlling terminal can make comparisons with user preset test threshold value according to test result, obtain the shielding cavity
Whether 6 signal shielding efficiency meets the requirements, and provides the test result whether passed through.
(9) system controlling terminal such as can be handled test result automatically, be shown, being stored, generating report, printing at the behaviour
Make.
(10) to meet the wide-band of covering 9kHz-40GHz and the testing requirement of small-sized shielding cavity 6, system is respectively adopted
Four kinds of antennas such as magnetic loop antenna, biconical antenna, dipole antenna and electromagnetic horn entirely test frequency range to cover, in test, only
It need to need to carry out antenna replacement according to test frequency range.It is signal frequency range below corresponding with antenna type and size
Relation table:
These antenna type and size are all specific to small-sized shielding cavity 6.When signal transmitting antenna 2 and signal receive
When antenna 3 is magnetic loop antenna, signal receiver 4 further includes built-in amplifier, and shielding to be tested is arranged in signal emission part
In chamber 6, signal receiving antenna 3 passes through coaxial cable connection signal receiver 4.When signal transmitting antenna 2 and signal receiving antenna
It 3 is biconical antenna, dipole antenna or when electromagnetic horn, signal receiving part point further includes coaxial cable, and signal receiving antenna 3 is logical
Coaxial cable connection signal receiver 4 is crossed, signal emission part is also disposed in shielding cavity 6 to be tested.In signal receiving part
Dividing may also include the field intensity probe connecting with signal receiver 4, can 6 signals leakiness position of bit mask chamber by field intensity probe.
Be provided with frequency synthesizer in signal generator, frequency synthesizer include Direct Digital Frequency Synthesizers and with number
Frequency synthesizer connection phaselocked loop, it can be achieved that various frequency signals synthesis.LAN interface is additionally provided on signal generator 1
And optical interface, meanwhile, which further includes control section, and control section includes program-controlled host 5, and program-controlled host 5 occurs with signal
Device 1 and signal receiver 4 are connected to the network, and the mode of network connection includes light, cable etc..Program-controlled host 5 can be with letter as a result,
Number generator 1 and signal receiver 4 are communicated, with monitoring signal generator 1 and signal receiver 4, so that the system is supported
Long-range control, and automatic test and automatic calibration function are supported through design, to make signal generator 1 in addition to supporting automatic cycle
Emit outside different frequency and the signal of amplitude, also support to realize long-range control by way of fiber optic communication, so realizes shielding
Efficient shield effectiveness is tested automatically under 6 realistic application conditions of chamber.
Above-described embodiment is only preferred embodiment, the protection scope being not intended to limit the utility model, practical new at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the protection of the utility model within the spirit and principle of type
Within the scope of.
Claims (9)
1. a kind of shield effectiveness test macro of small-sized shielding cavity, which is characterized in that including signal emission part, signal receiving part
Point and control section；
The signal emission part includes signal transmitting antenna and the signal generator for being built-in with supplying cell, and the signal occurs
Device connects the signal transmitting antenna, for passing through the signal transmitting antenna transmission of electromagnetic signals；
The signal receiving part point includes signal receiver and signal receiving antenna, and the signal receiver connects the signal and connects
Antenna is received, for receiving the electromagnetic signal by the signal receiving antenna, and power is carried out to the electromagnetic signal received
Detection；
The signal transmitting antenna and the signal receiving antenna include four kinds: magnetic loop antenna, biconical antenna, dipole antenna
And electromagnetic horn；
The system carries out shield effectiveness test using the signal transmitting antenna and signal receiving antenna of identical type；
The control section includes program-controlled host, the program-controlled host and the signal generator and the signal receiver network
Connection.
2. the shield effectiveness test macro of small-sized shielding cavity as described in claim 1, which is characterized in that the signal generator
Generally cuboid, length are respectively 308 millimeters, 260 millimeters, 90 millimeters.
3. the shield effectiveness test macro of small-sized shielding cavity as described in claim 1, which is characterized in that the signal generator
With 1 signal output channels.
4. the shield effectiveness test macro of small-sized shielding cavity as described in claim 1, which is characterized in that the magnetic loop antenna
Having a size of 230mm*190mm*80mm, the size of the biconical antenna is 330mm*130mm*540mm, the dipole antenna
Having a size of 90mm*50mm*4mm, the electromagnetic horn is when working frequency is 1GHz-18GHz, having a size of 345mm*98mm*
69mm, having a size of 125mm*55mm*42mm, is 26.5GHz- in working frequency when working frequency is 18GHz-26.5GHz
When 40GHz, having a size of 100mm*36mm*28mm.
5. the shield effectiveness test macro of small-sized shielding cavity as described in claim 1, which is characterized in that the signal emits day
Line is passive antenna.
6. the shield effectiveness test macro of small-sized shielding cavity as described in claim 1, which is characterized in that when the signal emits
When antenna and the signal receiving antenna are magnetic loop antenna, the signal receiver further includes built-in amplifier, the signal hair
It penetrates part to be arranged in shielding cavity to be tested, the signal receiving antenna connects the signal receiver by coaxial cable.
7. the shield effectiveness test macro of small-sized shielding cavity as described in claim 1, which is characterized in that when the signal emits
When antenna and the signal receiving antenna are biconical antenna, dipole antenna or electromagnetic horn, the signal receiving part point is also wrapped
Coaxial cable is included, the signal receiving antenna connects the signal receiver, the signal emission part by the coaxial cable
Set up separately and sets in shielding cavity to be tested.
8. the shield effectiveness test macro of small-sized shielding cavity as described in claim 1, which is characterized in that the signal generator
Inside be provided with frequency synthesizer, the frequency synthesizer include Direct Digital Frequency Synthesizers and with the digital frequency synthesizer
The phaselocked loop of connection.
9. the shield effectiveness test macro of small-sized shielding cavity as described in claim 1, which is characterized in that the signal generator
On be provided with LAN interface and optical interface.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820371440.1U CN208255316U (en) | 2018-03-19 | 2018-03-19 | The shield effectiveness test macro of small-sized shielding cavity |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820371440.1U CN208255316U (en) | 2018-03-19 | 2018-03-19 | The shield effectiveness test macro of small-sized shielding cavity |
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| CN208255316U true CN208255316U (en) | 2018-12-18 |
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ID=64607959
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109633513A (en) * | 2018-12-20 | 2019-04-16 | 北京无线电计量测试研究所 | A kind of determination method and system of installation electromagnetical radiation test darkroom performance |
| CN110441619A (en) * | 2019-09-09 | 2019-11-12 | 华北电力大学 | A kind of magnetic field shielding effect test method for small size shielding box |
| CN111624425A (en) * | 2020-05-29 | 2020-09-04 | 北京无线电计量测试研究所 | System and method for measuring shielding efficiency of electromagnetic pulse signal |
| CN112763818A (en) * | 2020-12-18 | 2021-05-07 | 北京无线电计量测试研究所 | Device and method for measuring broadband shielding effectiveness of small shield |
| CN116390468A (en) * | 2023-05-15 | 2023-07-04 | 北京航天天美科技有限公司 | Optimization method for electromagnetic shielding performance of military shelter |
-
2018
- 2018-03-19 CN CN201820371440.1U patent/CN208255316U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109633513A (en) * | 2018-12-20 | 2019-04-16 | 北京无线电计量测试研究所 | A kind of determination method and system of installation electromagnetical radiation test darkroom performance |
| CN110441619A (en) * | 2019-09-09 | 2019-11-12 | 华北电力大学 | A kind of magnetic field shielding effect test method for small size shielding box |
| CN111624425A (en) * | 2020-05-29 | 2020-09-04 | 北京无线电计量测试研究所 | System and method for measuring shielding efficiency of electromagnetic pulse signal |
| CN112763818A (en) * | 2020-12-18 | 2021-05-07 | 北京无线电计量测试研究所 | Device and method for measuring broadband shielding effectiveness of small shield |
| CN112763818B (en) * | 2020-12-18 | 2023-10-13 | 北京无线电计量测试研究所 | Device and method for measuring broadband shielding effectiveness of small shielding body |
| CN116390468A (en) * | 2023-05-15 | 2023-07-04 | 北京航天天美科技有限公司 | Optimization method for electromagnetic shielding performance of military shelter |
| CN116390468B (en) * | 2023-05-15 | 2023-08-18 | 北京航天天美科技有限公司 | Optimization method for electromagnetic shielding performance of military shelter |
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