CN206460104U - Radio reception simulator and equipment for testing Electro Magnetic Compatibility - Google Patents
Radio reception simulator and equipment for testing Electro Magnetic Compatibility Download PDFInfo
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- CN206460104U CN206460104U CN201621323755.6U CN201621323755U CN206460104U CN 206460104 U CN206460104 U CN 206460104U CN 201621323755 U CN201621323755 U CN 201621323755U CN 206460104 U CN206460104 U CN 206460104U
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
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Abstract
The utility model is related to a kind of radio reception simulator for being used to test Electro Magnetic Compatibility, and it includes following component：Input, for inputting received signal and ground signalling；T-shaped bias device, wherein, the T-shaped bias device has radio frequency DC terminal and radio-frequency head, and the input is connected with the radio frequency DC terminal of T-shaped bias device；Impedance matching module, the radio-frequency head of the T-shaped bias device is connected with the impedance matching module；Dc source, the dc source is powered to the impedance matching module；Output end, for exporting the signal via impedance matching module.In addition, the utility model is related to a kind of equipment for testing Electro Magnetic Compatibility.
Description
Technical field
The utility model is related to a kind of radio reception simulator for being used to test Electro Magnetic Compatibility and a kind of for testing
The equipment of Electro Magnetic Compatibility.
Background technology
Electro Magnetic Compatibility (EMC) test is a kind of to be used to evaluate vehicle to the anti-of the radiation of receiver on-board and antenna system
Disturb the important test event of characteristic.The utility model more particularly in road vehicle electromagnetic compatibility test it is very important such as
Lower test event, it is to assess from vehicle in itself to receiver on-board and the interference characteristic of vehicle-mounted antenna system radiation-emitting.
The Electro Magnetic Compatibility of vehicle is rather crucial for the electronic system of vehicle and the electronic system safety in operation of vehicle periphery, because
It concerns the safety in operation of electronic system control function.Nowadays, national standard and international technical standards are also required to carry out electricity
Magnetic compatibility test.
In existing test is built and implemented, for example T-shaped bias device of each component, impedance matching transformer, dc source
It is mutually discrete Deng.Particularly, members are also especially heavy and are difficult what is carried.In test, it is necessary first to
The above-mentioned each discrete component of arrangement in tested vehicle.Moreover, the wiring between each component is not having generally also by temporary cable
Carried out in the case of having electromagnetic shielding.Thus, tester has to using a large amount of cables, connector and experiment accessory, and this
A little components and device easily cause low measurement accuracy, poor reliability and measure uniformity and repeatable weak.Further, lead to
The complicated wiring for crossing a large amount of cables also easily causes false wiring and other electrical safety problems, such as short circuit, overload.In pole
In the case of end, it is also possible to occur damaging vehicle arrangement particularly antenna, radio and tester's safety may be jeopardized
Problem.
In addition, because the cable and connector using a large amount of exposures are without sufficiently examining in existing test is built
Consider the Electro Magnetic Compatibility of test system, cause test system background noise high, so that country or international standard can not be met
Requirement.It is additionally, since in existing test is built and carries out wiring usually using connectors such as crocodile clips, in the company of each component
There is also larger contact resistance in connecing, the contact resistance easily causes measuring accuracy variation and causes the tight of test result
Weight deviation and the reliability and uniformity of destruction test.
Secondly, existing test is built is also required to be frequently changed circuit or switch mode for different operating condition of test,
And this easily causes faulty operation to shorten the life-span of equipment, while also causing test efficiency low and testing cost height.
Utility model content
It is used to survey the utility model proposes a kind of radio reception simulator for being used to test Electro Magnetic Compatibility and one kind
The equipment for trying Electro Magnetic Compatibility.
According to one side of the present utility model, it is related to a kind of radio reception simulation for being used to test Electro Magnetic Compatibility
Device, the radio reception simulator includes following component：Input, for inputting received signal and ground signalling；It is T-shaped
Bias device, wherein, the T-shaped bias device has radio frequency DC terminal and radio-frequency head, and the input and the radio frequency of T-shaped bias device are straight
Flow end connection；Impedance matching module, the radio-frequency head of the T-shaped bias device is connected with the impedance matching module；Dc source, institute
Dc source is stated to power to the impedance matching module；Output end, for exporting the signal via impedance matching module.
Main group for test Electro Magnetic Compatibility is integrated with according to radio reception simulator of the present utility model
Part：T-shaped bias device, impedance matching module, dc source.By such high integration of component, in test electromagnetic compatibility
Wiring that first can be between simplified assembly during property, it is to avoid the possibility of false wiring, so as to reduce for equipment and personnel
It is dangerous.A large amount of cables, connector and the experiment accessory for having to use in building compared to existing test, it is possible to increase test
Reliability.
In addition, carrying out test arrangement according to the convenient tester of radio reception simulator of the present utility model, simultaneously
Also the worry carried in the multiple assembly needed for existing test is eliminated.Particularly will be according to radio of the present utility model
Receive simulator be applied to vehicle emc testing when, the above method also greatly convenient tester narrow and small
Activity in vehicle space.In addition, can also improve testing efficiency by radio reception simulator of the present utility model, reduce
Testing cost.
In addition, by integrating said modules, while the contact resistance in circuit is also avoided or reduce on, so as to improve
Measuring accuracy and the deviation for avoiding test result, while can also increase the reliability and uniformity of test.
According to a kind of embodiment of the present utility model, the dc source is powered to the DC terminal of the T-shaped bias device,
And powered by the radio frequency DC terminal of T-shaped bias device to antenna.Here, the antenna is particularly in addition to passive antenna
It is related to active antenna.In the case where testing vehicle Electro Magnetic Compatibility, the antenna is related to vehicle active antenna.In the embodiment party
In formula, dc source is connected with the DC terminal according to the T-shaped bias device in radio reception simulator of the present utility model, with this
A DC voltage bias can be provided for the radio frequency DC terminal of T-shaped bias device, can be active by the DC voltage bias
Antenna is powered.By such embodiment, without using in test using independent bulky battery or DC source,
They may influence test result.Particularly in the emc testing of vehicle multiple-way supply in the car can be avoided to connect
Line, so that convenient test implementation, also reduces the possibility of misconnection.In one embodiment, dc source can have and divide
The power module opened, the separated power module can power to the impedance matching module and to the T-shaped biasing respectively
Device is powered and is that the antenna is powered by T-shaped bias device.In another preferred embodiment, same dc source
Both be that the impedance matching circuit powers also by T-shaped bias device it is that the antenna is powered.It is particularly compact thus, it is possible to reach
Circuit structure and save cost.In a kind of particularly preferred embodiment, the dc source be high-capacity battery, especially
It is high-capacity lithium battery.Due to such battery small volume, enable to whole radio reception simulator size smaller simultaneously
And be easy to carry, consequently facilitating tester is arranged and transported.
According to a kind of embodiment of the present utility model, the dc source can provide at least two DC voltages, with
The different antenna for being adapted to.Here, active antenna may have a variety of possible supply voltages.The implementation of the present utility model
Mode can adapt to the active antenna of different voltage class.When vehicle is as emc testing object, different vehicle
Car antenna may have different supply voltages.Be especially considering that in the embodiment of the present utility model by according to
Radio reception simulator of the present utility model is applied to the situation of different vehicle so that the radio reception simulator can
The compatible test for a variety of vehicles.In one embodiment, dc source can have separated power module, described point
The power module opened can provide different DC voltages, for being adapted to different antennas.
According to a kind of embodiment of the present utility model, the dc source, which is constituted, power transfer module, dc source
At least two DC voltage can be provided by the power transfer module.In the embodiment of the present utility model,
Different voltages are provided by power transfer module, so as to can be embodied as not on the same day in the case where being provided with only one dc source
Line is powered.Thus the particularly compact structure according to radio reception simulator of the present utility model is reached, is also improved simultaneously
According to the scope of application of radio reception simulator of the present utility model.Particularly can be when testing the Electro Magnetic Compatibility of vehicle
Realization is easy to be arranged at the small size in vehicle, while the radio reception simulator is also compatible with different vehicle antennas.
According to a kind of embodiment of the present utility model, the impedance matching module has the impedance for multiple frequency ranges
With function.By such embodiment, the impedance matching module can be matched with different testing requirements.Particularly, institute
Stating multiple frequency ranges includes AM frequency ranges and FM frequency ranges.So there is the resistance for AM and FM frequency ranges simultaneously in the impedance matching module
, can be by covering most test according to radio reception simulator of the present utility model in the case of anti-matching feature
Need.In this case, particularly it also is provided with the switch for switching AM and FM frequency ranges so that tester can be easily
Conversion testing pattern, so as to avoid the steps such as rewiring, adjustment component, is tested into it is possible thereby to improve testing efficiency and save
This.
According to a kind of embodiment of the present utility model, the impedance matching module has two transistors, described two
Transistor constitutes second amplifying circuit.Here, the first transistor forms common collector amplifying circuit emitter-follower in other words, from
And relatively large input impedance (tens to hundreds of kilohms) that can be with common collector amplifying circuit and good high frequency spy
Property.Here, being used as the first transistor especially with N-channel MOS pipe.The emitter-base bandgap grading of the first transistor is connected to second transistor
Base stage.The second transistor formation common emitter amplifying circuit.Second transistor is especially with NPN type triode.Here, by
Relatively small (about tens ohm) in common emitter amplifying circuit output impedance, whole impedance matching module can have relatively large defeated
Enter impedance and relatively small output impedance.By such impedance matching module, it can particularly make the day when testing AM frequency ranges
The relatively large characteristic impedance (such as 100k Ω) of line is converted to less characteristic impedance (such as 50 Ω), for directly to survey
Measure reception device output.
According to a kind of embodiment of the present utility model, at least described impedance matching module, T-shaped bias device and dc source
It is integrated in a printed circuit board.Thus the height according to radio reception simulator of the present utility model can on the one hand be realized
Degree is integrated, reduces its volume consequently facilitating carrying.When carrying out emc testing to vehicle, such radio connects
The especially convenient tester of simulator is received to be attached, debug in narrow and small vehicle space.On the other hand, printed circuit board (PCB)
The good connection between each electrical equipment can be provided, it is to avoid bad connection, misconnection etc., so as to extend the radio reception
The life-span of simulator.And by such embodiment, greatly avoid contact with resistance, considerably improve measurement accuracy and
Testing reliability so that the uniformity and repeatability of test are strong.In a kind of particularly preferred embodiment, the impedance
It is integrated on the printed circuit board with module, the power transfer module, T-shaped bias device and dc source.In such manner, it is possible to real
Existing being reliably connected between the Highgrade integration and each component of whole radio reception simulator.It is particularly advantageous according to one kind
Design, the radio reception simulator can be realized on one piece of area only 15cm*10cm printed circuit board (PCB).Phase
For many bulky large-scale batteries of component such as 12V, impedance matching transformer in than being built in existing test, according to this
The radio reception simulator of utility model significantly reduces volume, so that its greatly convenient arrangement and transport.
According to a kind of embodiment of the present utility model, at least described impedance matching module, T-shaped bias device and dc source
It is integrated in a shielding box.For emc testing, wiring that existing method of testing is exposed due to it and not
Stable connection, the signal transmitted is highly prone to electromagnetic interference so that the background noise of test system is high, measurement accuracy is low,
Test is credible poor, so that the requirement of prescribed by standard can not be met.By practice, surveyed in existing method of testing
Try path presence obvious non-linear, this negatively have impact on emc testing result.And by according to the utility model
The embodiment, each component of radio reception simulator can be electromagnetically shielded relative to external environment so that each
Individual component and its interconnection are no longer influenced by electromagnetic interference, so as to reduce background noise, improve measurement accuracy, also make electromagnetism
Compatibility test result is more credible.According to one preferred embodiment, the T-shaped bias device, dc source, Power convert
Module and impedance matching module are integrated in a shielding box.In a kind of particularly preferred embodiment, in the shielding box
On be provided with the input and output end of the radio reception simulator.Such embodiment simplifies connecing for tester
Line, it is to avoid occur misconnection.Particularly, in order to provide good man-machine interface, the input and output end are separately positioned on institute
State on the opposite side of radio reception simulator.Preferably, the input and output end are set to BNC types and coaxially connected
Connect device.Thus, it is possible to realize especially good effectiveness.Preferably, be provided with the shielding box for change AM and
The switch of FM frequency ranges, thus, it is possible to easily switch different test frequency ranges, simplifies the operation of tester.Preferably, the screen
The selecting switch being provided with box for changing at least two DC voltage is covered, thus, it is possible to by adjusting the selecting switch
To select the different power voltage of antenna, such as 0V, 5V, 8V, 12V.So as to which the radio reception simulator can be simply and square
Just the requirement of different antennae is adapted to.Preferably, be provided with the shielding box for be integrated in dc source, spy
It is not the charging port of high capacity cell, is thus easily charged without taking shielding box apart.
According to another aspect of the present utility model, it is related to a kind of equipment for testing Electro Magnetic Compatibility, the equipment bag
Include according to radio reception simulator of the present utility model and t connector, the t connector includes three interfaces, institute
State input, antenna and radio that three interfaces are respectively used to connect radio reception simulator, and the t connector
It is configured to electromagnetic shielding.
According to it is of the present utility model be used for test in the equipment of Electro Magnetic Compatibility, can by t connector by antenna,
Radio and radio reception simulator are connected with each other, the mode of connection especially simplified thus, it is possible to realize, so as to avoid each
Cumbersome connection between part and the implementation of greatly convenient test.And according to the utility model, the t connector structure
As electromagnetic shielding, electromagnetic interference is not easily susceptible to thus, it is possible to the signal for particularly good ensureing transmitted, so as to ensure the back of the body
Scape noise is low, measurement accuracy is high, also makes emc testing result more credible.According to one preferred embodiment, institute
Three interfaces for stating t connector adapt to the interface that antenna, radio and radio reception simulator are configured respectively, for example
It is used for the interface that is connected with antenna on t connector and can be applied to for the interface being connected with radio reception simulator
The interface for being used to be connected with radio on the coaxially connected interface of BNC types, t connector can apply to SMA type connecting interfaces.
On the one hand, the embodiment can provide stable connection, thus, it is possible to reduce contact resistance, and prevent junction from occurring short
Road or overload.For the temporary wiring carried out especially with crocodile clip in existing method of testing, undoubtedly
It is the problem of improving connective stability and contact resistance, also relative to being even more to improve prolonged and repeated connection for temporary transient wiring
The durability of dismounting.On the other hand, the connection between the more convenient test arrangement of such embodiment and each device so that
Tester can rapidly be attached dismounting so that testing efficiency is improved, so as to reduce testing cost.Enter in one kind
In the preferred form of implementation of one step, the interface not configured for the interface being connected with radio with radio of t connector
Cored wire connection.The test request for meeting country or international standard defined can be realized by such form of implementation.
According to a kind of embodiment of the present utility model, the interface for being used to connect radio of the t connector is free of
Cored wire.The test request for meeting country or international standard defined can be particularly good realized by such form of implementation.
Specifically, such t connector be used for connect the interface of radio only there is screen layer without cored wire therein, this
The design of sample is particular enable to meet the theoretical direction scheme of the standard.
According to a kind of embodiment of the present utility model, the interface for being used to connect radio of the t connector can
Only it is connected with its screen layer with radio receiver shell.Can be realized in emc testing by this embodiment makes screen layer
Directly it is grounded by radio receiver shell.Then, t connector be used for connect the interface of radio, screen layer can be with
The housing good connection of radio ground connection, so as to meet test request, realizes good test condition.
According to a kind of embodiment of the present utility model, the dc source of radio reception simulator can in the equipment
Powered by the input of radio reception simulator via t connector to antenna.As it was noted above, being connect in the radio
Receive in simulator, dc source can be connected with the DC terminal of T-shaped bias device, and straight by the radio frequency of the T-shaped bias device
Stream end powers to antenna, and thus, the bias voltage that T-shaped bias device is provided can pass through the defeated of the radio reception simulator
Enter end to power, particularly powered to antenna via the cored wire of the t connector to antenna via the t connector.Here,
Antenna relates preferably to active antenna.Test device can be simplified in this embodiment, simplify emc testing
Arrangement.
According to a kind of embodiment of the present utility model, the equipment for being used to test Electro Magnetic Compatibility is used to test vehicle
Electro Magnetic Compatibility.Here, described be used to test the equipment of Electro Magnetic Compatibility to carry out test arrangement in inner space
In, t connector is used to the input of car antenna, vehicle-mounted radio and radio reception simulator being connected with each other.According to
The equipment of the present utility model for being used to test Electro Magnetic Compatibility is due to its high integration and good electromagnetic wave shielding and letter
Single connected mode and the emc testing for being particularly suitable for vehicle.It is used to test electromagnetic compatibility according to of the present utility model
Property equipment on the other hand on the one hand can simplify the operation of tester be even more that can provide precisely reliable test result.
Brief description of the drawings
Below according to preferred embodiment the utility model is further illustrated by accompanying drawing.
Fig. 1 is shown according to the first implementation of the present utility model for being used to test the radio reception simulator of Electro Magnetic Compatibility
Example；
Fig. 2 is shown according to the second implementation of the present utility model for being used to test the radio reception simulator of Electro Magnetic Compatibility
Example；
Fig. 3 is shown according to the 3rd implementation of the present utility model for being used to test the radio reception simulator of Electro Magnetic Compatibility
Example；
Fig. 4 is shown according to the 4th implementation of the present utility model for being used to test the radio reception simulator of Electro Magnetic Compatibility
Example；
Fig. 5 is shown according to the impedance matching of the present utility model for being used to test the radio reception simulator of Electro Magnetic Compatibility
The schematic partial circuit diagram of module；
Fig. 6 is shown according to the front view of the present utility model for being used to test the radio reception simulator of Electro Magnetic Compatibility；
Fig. 7 is shown according to the rearview of the present utility model for being used to test the radio reception simulator of Electro Magnetic Compatibility；
Fig. 8 is shown according to the schematic diagram of the present utility model for being used to test the equipment of Electro Magnetic Compatibility；
Fig. 9 is shown according to the amplification signal of the present utility model for being used to test the T connectors of the equipment of Electro Magnetic Compatibility
Figure；
Figure 10 shows the schematic diagram of the method for testing Electro Magnetic Compatibility, here, shown method is applied to vehicle, wherein
Not only make use of according to it is of the present utility model be used for test Electro Magnetic Compatibility radio reception simulator and also make use of according to
Equipment of the present utility model for testing Electro Magnetic Compatibility；
Figure 11 is shown using insertion loss result of the measuring route in FM frequency ranges when being built according to existing test；
Figure 12 shows insertion loss result of the measuring route in FM frequency ranges when using according to equipment of the present utility model；
Figure 13 is shown using insertion loss result of the measuring route in AM frequency ranges when being built according to existing test；
Figure 14 shows insertion loss result of the measuring route in AM frequency ranges when using according to equipment of the present utility model.
Embodiment
Fig. 1 is shown according to the first reality of the present utility model for being used to test the radio reception simulator 1 of Electro Magnetic Compatibility
Apply example.Here, radio reception simulator 1 includes：Input 2, the signal and ground connection preferably received for inputting by antenna is believed
Number；T-shaped bias device 4, wherein, the T-shaped bias device 4 has radio frequency DC terminal RF+DC and radio-frequency head RF, the input 2 and T
The radio frequency DC terminal RF+DC connections of type bias device 4；Impedance matching module 5, radio-frequency head RF and the resistance of the T-shaped bias device 4
Anti- matching module 5 is connected；Dc source 6, the dc source 6 is powered to the impedance matching module 5；Output end 3, for defeated
Go out the signal via impedance matching module 5.
Fig. 2 is shown according to the second reality of the present utility model for being used to test the radio reception simulator 1 of Electro Magnetic Compatibility
Apply example.Here, radio reception simulator 1 includes：Input 2, the signal and ground connection preferably received for inputting by antenna is believed
Number；T-shaped bias device 4, wherein, the T-shaped bias device 4 has radio frequency DC terminal RF+DC, radio-frequency head RF and DC terminal DC, described
Input 2 is connected with the radio frequency DC terminal RF+DC of T-shaped bias device 4；Impedance matching module 5, the radio-frequency head of the T-shaped bias device 4
RF is connected with the impedance matching module 5；Dc source 6, the dc source 6 is powered to the impedance matching module 5；Output
End 3, for exporting the signal via impedance matching module 5, wherein, the dc source 6 is also to the straight of the T-shaped bias device 4
Stream end DC powers, and is powered by the radio frequency DC terminal RF+DC of T-shaped bias device 4 to antenna.The antenna is more particularly to needed
Want the active antenna of direct current supply.Power here, same dc source 6 had both been the impedance matching module 5 or be that T types are inclined
Put device 4 to power, can be powered by the T-shaped bias device 4 via the input 2 to antenna.In one embodiment, it is described
Dc source 6 is 12V high-capacity lithium batteries.Such battery small volume, enables to the whole chi of radio reception simulator 1
It is very little smaller and be easy to carry, consequently facilitating tester's arrangement and transporting.
Fig. 3 is shown according to the 3rd reality of the present utility model for being used to test the radio reception simulator 1 of Electro Magnetic Compatibility
Apply example.Here, radio reception simulator 1 includes：Input 2, the signal and ground connection preferably received for inputting by antenna is believed
Number；T-shaped bias device 4, wherein, the T-shaped bias device 4 has radio frequency DC terminal RF+DC, radio-frequency head RF and DC terminal DC, described
Input 2 is connected with the radio frequency DC terminal RF+DC of T-shaped bias device 4；Impedance matching module 5, the radio-frequency head of the T-shaped bias device 4
RF is connected with the impedance matching module 5；Dc source 6, the dc source, which is constituted, power transfer module 7, the power supply
Modular converter 7 is connected with the impedance matching module 5 and with the DC terminal DC of the T-shaped bias device 4, thus, the direct current
Power supply 6 can be powered by the radio frequency DC terminal RF+DC of power transfer module 7 to impedance matching module 5 and T-shaped bias device 4；It is defeated
Go out end 3, for exporting the signal via impedance matching module 5, wherein, dc source 6 can by the power transfer module 7
At least two DC voltages are provided, for being adapted to different antennas.Preferably, it is that the power transfer module 7 is configured with use
In the selecting switch for switching at least two DC voltage, thus, it is possible to be selected by adjusting the selecting switch to antenna
Different power voltage, such as 0V, 5V, 8V, 12V.
Fig. 4 is shown according to the 4th reality of the present utility model for being used to test the radio reception simulator 1 of Electro Magnetic Compatibility
Apply example.Here, radio reception simulator 1 includes：Input 2, the signal and ground connection preferably received for inputting by antenna is believed
Number；T-shaped bias device 4, wherein, the T-shaped bias device 4 has radio frequency DC terminal RF+DC, radio-frequency head RF and DC terminal DC, described
Input 2 is connected with the radio frequency DC terminal RF+DC of T-shaped bias device 4；Impedance matching module 5, the radio-frequency head of the T-shaped bias device 4
RF is connected with the impedance matching module 5；Dc source 6, the dc source, which is constituted, power transfer module 7, the power supply
Modular converter 7 is connected with the DC terminal DC of the T-shaped bias device 4 and dc source 6 directly connects with the impedance matching module 5
Connect, thus, the dc source 6 directly can power to impedance matching module 5 and by power transfer module 7 to T-shaped biasing
The radio frequency DC terminal RF+DC of device 4 powers, and is powered again to antenna by T-shaped bias device 4 herein；Output end 3, for export via
The signal of impedance matching module 5, here, dc source 6 can be to T-shaped bias device namely by the power transfer module 7
Say to antenna and at least two DC voltages are provided, for being adapted to different antennas.
Fig. 5 is shown according to the impedance matching of the present utility model for being used to test the radio reception simulator of Electro Magnetic Compatibility
The schematic partial circuit diagram of module.Here, the impedance matching module has the impedance matching function for multiple frequency ranges.Institute
Stating multiple frequency ranges particularly includes AM frequency ranges and FM frequency ranges.Described impedance matching module is particularly suitable for AM frequencies in Figure 5
The impedance matching of section.The function of major electrical components in Fig. 5 is briefly explained at this.In Fig. 5, the radio-frequency head of the T-shaped bias device 4
RF is connected to the input of impedance matching module.Here, limiting current input signal by R1.Two preposition diodes are played
Protective effect, to prevent overvoltage and overcurrent.First crystal is set by electric capacity C1, resistance R2, resistance R3 and resistance R4
Pipe Q1 quiescent point, wherein, electric capacity C1 is used for filtering high frequency signals.Electric capacity C2 and electric capacity C3 is used to filter dc source
Ripple.The first transistor Q1 forms common collector amplifying circuit emitter-follower in other words herein, so as to use common collector
The relatively large input impedance (tens to hundreds of kilohms) of amplifying circuit and good high frequency characteristics.Here, especially with n
Channel MOS tube is used as the first transistor Q1.The first transistor Q1 emitter-base bandgap grading is connected to second transistor Q2 base stage.Described second
Transistor Q2 formation common emitter amplifying circuits.Second transistor Q2 is especially with NPN type triode.Here, due to common emitter
Amplifying circuit output impedance is relatively small (about tens ohm), whole impedance matching module can have relatively large input impedance and
Relatively small output impedance.By such impedance matching module, it can particularly make the relative of when testing AM frequency ranges antenna
Big characteristic impedance (such as 100k Ω) is converted to less characteristic impedance (such as 50 Ω), for directly receiving dress to measurement
Put output.In addition, second transistor Q2 colelctor electrode is connected with electric capacity C4, only protected for the flip-flop in isolation signal
Stay alternating component.Here, electric capacity C4 is particularly the magnetic sheet electric capacity with good high frequency performance.
According to one preferred embodiment, impedance matching module also includes a relay, and the relay is connected to
Before local circuit shown in Fig. 5, the relay is connected with the change-over switch of selection AM frequency ranges and FM frequency ranges, for choosing
The frequency range to be tested.Particularly, when testing AM frequency ranges, relay makes signal be input in circuit as shown in Figure 5, and
When testing FM frequency ranges, relay can make signal bypass the output end that the circuit is directly transferred to radio reception simulator.
In the utility model, at least described impedance matching module, T-shaped bias device and dc source are integrated in a bar printing
On circuit board.It is further preferred that the T-shaped bias device of impedance matching module, dc source and the power transfer module are integrated
In in a printed circuit board, wherein, T-shaped bias device sets or is fixedly connected on the printed circuit board with dc source.
Here, to provide more preferable shield effectiveness to according to radio reception simulator of the present utility model, at least described radio connects
The impedance matching module, T-shaped bias device and the dc source for receiving simulator are integrated in a shielding box.Preferably, it is described
The all component of radio reception simulator is integrated in a shielding box.
Fig. 6 is shown according to the front view of the present utility model for being used to test the radio reception simulator 1 of Electro Magnetic Compatibility.
Herein it can be seen that the front of the radio reception simulator for testing Electro Magnetic Compatibility includes：Input 2, the and of main switch 8
Charging port 9 for dc source.Here, the input 2 is configured to BNC type connecting interfaces.Here, such interface is
Particularly preferred, because it can provide good shield effectiveness and stable connection, and convenient tester connects repeatedly
Connect dismounting.
Fig. 7 is shown according to the rearview of the present utility model for being used to test the radio reception simulator 1 of Electro Magnetic Compatibility.
Herein it can be seen that the back side of the radio reception simulator for testing Electro Magnetic Compatibility includes：Output end 3, AM/FM conversions
Switch 10, antenna supply voltage selecting switch 11 and working station indicator 12.Here, the output end 3 is configured to BNC types
Connecting interface, it can provide good shield effectiveness and stable connection, and convenient tester connection disassembling repeatedly.
It is worth noting that, in the embodiment of the present utility model, input 2 and output end 3 are separately positioned on radio reception mould
On the opposite face for intending device 1, thus, it is possible to realize especially rational man-machine interface.In addition, AM/FM switch it is described for changing
Changed between the impedance matching function of the AM and FM frequency ranges of impedance matching module 5.Antenna supply voltage selecting switch 11 is used
In manipulating power transfer module 7, to provide the different power voltage to antenna, such as 0V, 5V, 8V, 12V.
Fig. 8 is shown according to the schematic diagram of the present utility model for being used to test the equipment 13 of Electro Magnetic Compatibility, the equipment bag
Radio reception simulator 1 and t connector 14 described above is included, the t connector 14 includes three interfaces, described
Three interfaces namely for connect the first interface 15 of radio reception simulator, the second interface 16 for connecting antenna and
The 3rd interface 17 for connecting radio, and the t connector 14 is configured to electromagnetic shielding.In the equipment 13
In, the first interface 15 of t connector 14 can be connected with the input 2 of radio reception simulator 1.In addition, t connector
14 are provided with electro-magnetic screen layer, thus are monolithically fabricated as electromagnetic shielding.It is described to be used to test electromagnetic compatibility according to the utility model
Property equipment be particularly suitable for test vehicle Electro Magnetic Compatibility.
Fig. 9 shows the enlarged diagram according to t connector 14 of the present utility model.Here, the as above institute of t connector 14
Include first interface 15, the interface 17 of second interface 16 and the 3rd with stating.In the present example, t connector 14 can be by electricity
The coaxial cable of magnetic screen and coaxially connected joint such as SMA, SMB, BNC, TNC, SMC etc. are constituted.For example, being used on t connector
It is coaxially connected that BNC types can be applied in the interface being connected with antenna and interface for being connected with radio reception simulator
The interface for being used to be connected with radio on interface, t connector can apply to SMA type connecting interfaces.It is special in figs. 8 and 9
Be not show it is of the present utility model it is a kind of preferred embodiment, i.e. being used for of the t connector 14 connects radio
3rd interface 17 is free of cored wire.It is alternatively possible to which using the coaxial cable without cored wire or the same of no cored wire connection can be used
Shaft cable connecting interface.Here, the 3rd interface 17 for being used to connect radio of the t connector can be only with its screen layer
It is connected with radio receiver shell.Description as described above for radio reception simulator is understood, described to be used to test Electro Magnetic Compatibility
Equipment 13 can be powered by the input 2 of radio reception simulator 1 via t connector 14 to antenna, particularly pass through
Powered from the cored wire of t connector 14 to antenna.That is, the cored wire shown in the figure of t connector 14 is applied not only to pass
Defeated antenna received signal and for being powered to antenna.
Figure 10 shows the schematic diagram of the method for testing Electro Magnetic Compatibility, here, shown method is applied to vehicle, wherein
It can not only utilize and be more available with according to the radio reception simulator 1 of the present utility model for being used to test Electro Magnetic Compatibility
According to the equipment 13 of the present utility model for being used to test Electro Magnetic Compatibility.In shown method, for example car antenna 18 is received
Signal be input in the radio reception simulator 1 and exported by the radio reception simulator 1 and connect to measurement
Receiving apparatus 19.According to country or international standard, when carrying out emc testing, tested vehicle 20 is placed in anechoic chamber, 21
In.As illustrated, tested vehicle 20 includes car antenna 18 and vehicle-mounted radio 23, the housing of the vehicle-mounted radio 23 passes through
Wire 24 is grounded.In shown method, preferably use according to the t connector 14 in equipment of the present utility model.Here, T-shaped
Connector 14 is connected by car antenna 18 with vehicle-mounted radio 23 and according to radio reception simulator 1 of the present utility model.
In particularly preferred embodiment as depicted, the 3rd interface 17 for connecting radio of shown t connector 14 is not
Containing cored wire, that is to say, that the 3rd interface 17 is only connected with its screen layer with the housing of the ground connection of vehicle-mounted radio 23, good with this
Meet the test request of prescribed by standard well.The received signal of car antenna 18 is conveyed to the nothing by t connector 14
Line electricity receives the input 2 of simulator 1, and in the case where car antenna 18 is active antenna, t connector 14 also will be by
The supply voltage that the input 2 of radio reception simulator 1 is provided is transferred to car in the case of especially with same cored wire
Carry antenna 18.The received signal of car antenna 18 is in the processing by radio reception simulator 1 in other words by being used to survey
Exported after the processing for the equipment 13 for trying Electro Magnetic Compatibility by the output end 3 of radio reception simulator 1.Here, from output
The signal that end 3 is sent is conveyed to the measurement outside anechoic chamber, 21 by coaxial cable via coaxial wall-penetrating type connector 22
Reception device 19 and measurement reception device 19 in processing is further analyzed.The measurement reception device 19 is inputted herein
The signal for being received, being handled via t connector 14 and by the radio reception simulator 1 by car antenna 18.
Figure 11 and Figure 12 are shown respectively using building and surveyed during according to equipment of the present utility model according to existing test
Measure insertion loss result of the path in FM frequency ranges.Substantially it can be seen that being measured when being built using existing test from Figure 11
Decay of the path in FM frequency ranges shows the curve of zigzag vibration.In other words, it is existing to test on the test path built
Exist non-linear, and such non-linear cause the low credibility of emc testing result precision poor at last.In contrast,
Use in fig. 12 in the curve according to equipment of the present utility model, it can be seen that preferably linear, it follows that using pressing
Test result is more genuine and believable during according to equipment of the present utility model.
Figure 13 and 14 is shown respectively using building and measured during according to equipment of the present utility model according to existing test
Insertion loss result of the path in AM frequency ranges.As can be seen from Figure 13, using it is existing test build when measuring route AM frequency
Decay in section shows the curve fluctuated up and down, and this also illustrates there is also obvious on the existing test path tested and built
It is non-linear, the low credibility of test result precision thus can be caused poor.And it is as shown in figure 14, using according to of the present utility model
Then showed during equipment preferably linearly, thus can prove that test result is more when using according to equipment of the present utility model
It is genuine and believable.
The utility model is not limited to shown embodiment, but including or extend to that having for appended claims can be fallen into
All technical equivalents in the range of effect.Selected position description is such as example forward and backward with reference to straight in the description
The description connect and the accompanying drawing shown and it can be converted on new position according to meaning in change in location.
Claims (14)
1. a kind of radio reception simulator for being used to test Electro Magnetic Compatibility, it is characterised in that the radio reception simulation
Device includes following component：
Input, for inputting received signal and ground signalling；
T-shaped bias device, wherein, the T-shaped bias device has radio frequency DC terminal and radio-frequency head, the input and T-shaped bias device
Radio frequency DC terminal connection；
Impedance matching module, the radio-frequency head of the T-shaped bias device is connected with the impedance matching module；
Dc source, the dc source is powered to the impedance matching module；
Output end, for exporting the signal via impedance matching module.
2. according to the radio reception simulator described in claim 1, it is characterised in that the dc source to it is described it is T-shaped partially
The DC terminal for putting device is powered, and is powered by the radio frequency DC terminal of T-shaped bias device to antenna.
3. according to the radio reception simulator described in claim 2, it is characterised in that the dc source can be provided at least
Two kinds of DC voltages, for being adapted to different antennas.
4. according to the radio reception simulator described in claim 3, it is characterised in that the dc source, which is constituted, has power supply to turn
Block is changed the mold, dc source can provide at least two DC voltage by the power transfer module.
5. according to the radio reception simulator described in one of Claims 1-4, it is characterised in that the impedance matching module
With the impedance matching function for multiple frequency ranges.
6. according to the radio reception simulator described in claim 5, it is characterised in that the multiple frequency range include AM frequency ranges and
FM frequency ranges.
7. according to the radio reception simulator described in one of Claims 1-4, it is characterised in that the impedance matching module
With two transistors, described two transistors constitute second amplifying circuit.
8. according to the radio reception simulator described in one of Claims 1-4, it is characterised in that at least described impedance matching
Module, T-shaped bias device and dc source are integrated in a printed circuit board.
9. according to the radio reception simulator described in one of Claims 1-4, it is characterised in that at least described impedance matching
Module, T-shaped bias device and dc source are integrated in a shielding box.
10. a kind of equipment for testing Electro Magnetic Compatibility, it is characterised in that the equipment include according to claim 1 to 9 it
Radio reception simulator and t connector described in one, the t connector include three interfaces, three interfaces
It is respectively used to connect input, antenna and the radio of radio reception simulator, and the t connector is configured to electromagnetism
Shielding.
11. according to the equipment described in claim 10, it is characterised in that being used for of the t connector connects connecing for radio
Mouth is free of cored wire.
12. according to the equipment described in claim 11, it is characterised in that being used for of the t connector connects connecing for radio
Mouth only can be connected with its screen layer with radio receiver shell.
13. according to the equipment described in one of claim 10 to 12, it is characterised in that radio reception simulator in the equipment
Dc source can be powered by the input of radio reception simulator via t connector to antenna.
14. according to the equipment described in one of claim 10 to 12, it is characterised in that described to be used to test setting for Electro Magnetic Compatibility
It is ready for use on the Electro Magnetic Compatibility of test vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621323755.6U CN206460104U (en) | 2016-12-05 | 2016-12-05 | Radio reception simulator and equipment for testing Electro Magnetic Compatibility |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621323755.6U CN206460104U (en) | 2016-12-05 | 2016-12-05 | Radio reception simulator and equipment for testing Electro Magnetic Compatibility |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206460104U true CN206460104U (en) | 2017-09-01 |
Family
ID=59693112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621323755.6U Withdrawn - After Issue CN206460104U (en) | 2016-12-05 | 2016-12-05 | Radio reception simulator and equipment for testing Electro Magnetic Compatibility |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206460104U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108152608A (en) * | 2016-12-05 | 2018-06-12 | 华晨宝马汽车有限公司 | For testing the radio reception simulator of Electro Magnetic Compatibility, device and method |
| CN108282172A (en) * | 2018-01-25 | 2018-07-13 | 汽-大众汽车有限公司 | A kind of power supply adaptor |
| CN109189040A (en) * | 2018-08-06 | 2019-01-11 | 芜湖莫森泰克汽车科技股份有限公司 | A kind of louver controller testing equipment for EMC test |
| CN108152608B (en) * | 2016-12-05 | 2024-05-28 | 华晨宝马汽车有限公司 | Radio reception simulator, apparatus and method for testing electromagnetic compatibility |
-
2016
- 2016-12-05 CN CN201621323755.6U patent/CN206460104U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108152608A (en) * | 2016-12-05 | 2018-06-12 | 华晨宝马汽车有限公司 | For testing the radio reception simulator of Electro Magnetic Compatibility, device and method |
| CN108152608B (en) * | 2016-12-05 | 2024-05-28 | 华晨宝马汽车有限公司 | Radio reception simulator, apparatus and method for testing electromagnetic compatibility |
| CN108282172A (en) * | 2018-01-25 | 2018-07-13 | 汽-大众汽车有限公司 | A kind of power supply adaptor |
| CN108282172B (en) * | 2018-01-25 | 2023-11-10 | 一汽-大众汽车有限公司 | Power adapter |
| CN109189040A (en) * | 2018-08-06 | 2019-01-11 | 芜湖莫森泰克汽车科技股份有限公司 | A kind of louver controller testing equipment for EMC test |
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