CN210897618U - Antenna module for simulating terminal radiation and in-vehicle electromagnetic radiation test system - Google Patents
Antenna module for simulating terminal radiation and in-vehicle electromagnetic radiation test system Download PDFInfo
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- CN210897618U CN210897618U CN201922224209.7U CN201922224209U CN210897618U CN 210897618 U CN210897618 U CN 210897618U CN 201922224209 U CN201922224209 U CN 201922224209U CN 210897618 U CN210897618 U CN 210897618U
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Abstract
The utility model provides an electromagnetic radiation test system in antenna module and car of simulation terminal radiation. The antenna module includes a substrate; the first surface of the substrate is provided with a radiation microstrip, a feeder line connected with the radiation microstrip and used for inputting radio frequency signals to the radiation microstrip, and a power regulating unit connected in series with the feeder line; and the second surface of the substrate is provided with a grounding layer, the first surface and the second surface are opposite, and the grounding layer covers all or part of the feeder line on the second surface. The antenna module has good omni-directionality, can flexibly adjust the radiation power of the radiation microstrip through the power adjusting unit, can highly simulate the electromagnetic radiation condition of the terminal equipment in various working modes, and solves the problem of poor consistency of test data caused by different terminal equipment manufacturers, placing postures and test placing positions when the terminal equipment is directly used for radiation test. The system performs radiation test in a microwave darkroom, can avoid external signal interference and guides a user to reasonably place the terminal.
Description
Technical Field
The utility model relates to an electromagnetic radiation test field, concretely relates to antenna module and interior electromagnetic radiation test system of car of simulation terminal radiation.
Background
At present, in the great change of intellectuality, networking and electromotion of automobiles, the proportion of electronic parts of the whole automobile is increasing, however, the electronic equipment also brings a series of electromagnetic compatibility and human electromagnetic radiation problems when increasing the intellectuality and the convenience of automobiles, and the use of mobile terminal equipment carried by drivers and passengers, such as mobile phone conversation and the like, can aggravate the human electromagnetic radiation problem in the automobile. The existing human body electromagnetic protection testing technology mainly aims at the frequency band of 10Hz to 400KHz in a vehicle, tests of high frequency bands (such as 30MHz to 3GHz) are less, and tests of electromagnetic radiation of a mobile phone in the vehicle under a conversation state are less. Due to the fact that the styles, placing postures and in-car positions for testing the terminal devices are different, the electromagnetic radiation testing results of the terminal devices in the car cannot be well reproducible, and therefore the design of the alternative scheme is particularly important.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects existing in the prior art, the utility model aims to provide an antenna module and interior electromagnetic radiation test system of car of simulation terminal radiation.
In order to achieve the above object of the present invention, according to a first aspect of the present invention, there is provided an antenna module for simulating terminal radiation, comprising a substrate; a radiation microstrip and a feeder line connected with the radiation microstrip and a radio frequency signal source are arranged on the first surface of the substrate; a grounding layer is arranged on the second surface of the substrate, the first surface and the second surface are opposite, and the grounding layer covers all or part of the feeder line on the second surface; the radiation power of the radiation microstrip is adjustable.
The beneficial effects of the above technical scheme are: the antenna module adopts a microstrip structure as an antenna body to radiate radio frequency signals, and the grounding layer only covers all or part of the feeder lines on the second surface, so that the antenna module has good omni-directionality, the radiation power of the radiation microstrip can be adjusted, the electromagnetic radiation condition of terminal equipment (such as mobile phones) of different manufacturers under various working modes (such as conversation, data uploading or data downloading and the like) can be highly simulated, and the problem of poor test data consistency caused by different terminal equipment manufacturers, placing postures and test placing positions when the terminal equipment is directly used for radiation test is solved; and the antenna module also has the beneficial effects of simple structure and easy processing.
In a preferred embodiment of the present invention, the output power of the rf signal source connected to the feeder line is adjustable; and/or a power regulating unit is connected in series with the feeder.
The beneficial effects of the above technical scheme are: the method for realizing the adjustable radiation power of the radiation microstrip is easy to implement and convenient for highly simulating the electromagnetic radiation condition of different terminal equipment (such as mobile phones) in various working modes (such as conversation, data uploading or data downloading and the like).
In a preferred embodiment of the present invention, the power adjusting unit includes an adjusting resistor, and the adjusting resistor is connected in series to the feeder.
The beneficial effects of the above technical scheme are: the radiation power of the radiation microstrip is adjusted by adjusting the resistance value of the resistor, the larger the resistance value of the resistor is, the more energy is absorbed by the resistor, and the smaller the radiation power of the radiation microstrip is, so that the radiation microstrip antenna has the characteristics of simple structure, low cost and convenience and quickness in radiation power adjustment; and the normalization and repeatability of the test data can be highly ensured.
The utility model discloses an in the preferred embodiment, still include radio frequency signal input interface, radio frequency signal input interface input is connected with radio frequency signal source's output, and radio frequency signal input interface output is connected with the feeder input.
The beneficial effects of the above technical scheme are: the radio frequency signal input interface is convenient for being connected with an external radio frequency signal source.
In order to achieve the above object of the present invention, according to a second aspect of the present invention, the present invention provides an in-vehicle electromagnetic radiation testing system, comprising a microwave anechoic chamber, a vehicle located in the microwave anechoic chamber, a radio frequency signal source, an antenna module of the present invention disposed inside the vehicle, and at least one electromagnetic detecting unit disposed inside the vehicle; the radio frequency signal source is arranged on the antenna module or is arranged separately from the antenna module, and the output end of the radio frequency signal source is connected with the input end of the feeder line; the electromagnetic detection unit detects the size of electromagnetic radiation in the vehicle.
The beneficial effects of the above technical scheme are: the system has the beneficial effects of the antenna module, and also has the advantages that the antenna module replaces the terminal equipment to carry out the electromagnetic radiation distribution test of the in-vehicle terminal equipment in the microwave darkroom, so that the problem of poor test data consistency caused by different terminal equipment manufacturers, placing postures and test placing positions when the terminal equipment is directly used for carrying out radiation test is solved, and the test normalization and repeatability are improved; in addition, the system is convenient for guiding consumers to reasonably place terminal equipment or providing data support for the positions of T-box antennas arranged by the vehicle enterprises in the research and development stage, thereby creating a safe driving environment for the consumers; and radiation testing is carried out in a microwave darkroom, so that the influence of external interference signals on a test result can be avoided, and the test precision and accuracy are improved.
In a preferred embodiment of the present invention, when the electromagnetic detecting unit is plural, the plural electromagnetic detecting units are located at different positions in the vehicle.
The beneficial effects of the above technical scheme are: a plurality of electromagnetic detection units can detect simultaneously, are convenient for obtain terminal equipment in the distribution condition of in-car electromagnetic radiation fast.
The utility model discloses an in the preferred embodiment, still include respectively place in a plurality of dummy in driver's seat and passenger seat the electromagnetic detection unit has been laid in different organ positions of dummy and driver's seat personnel hand contactable area.
The beneficial effects of the above technical scheme are: the radiation intensity of human organ parts and the hand contactable area of the driver in the working state of the terminal equipment can be evaluated conveniently.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a front view of an antenna module according to a preferred embodiment of the present invention;
fig. 2 is a left side view of the structure of an antenna module in a preferred embodiment of the present invention;
fig. 3 is a graph of the radiation efficiency of the microstrip with the adjustment resistance value in the antenna module according to a preferred embodiment of the present invention;
fig. 4 is a two-dimensional pattern of an antenna module in a preferred embodiment of the present invention;
fig. 5 is a partial system block diagram of an in-vehicle electromagnetic radiation testing system according to a preferred embodiment of the present invention.
Reference numerals:
1 radiating a microstrip; 2a ground plane; 3a power regulating unit; 4a substrate; 5 feeder lines.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, or may be connected between two elements through an intermediate medium, or may be directly connected or indirectly connected, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.
The utility model discloses an antenna module for simulating terminal radiation, which comprises a substrate 4 in a preferred embodiment, as shown in figures 1 and 2; a radiation microstrip 1 and a feeder line 5 connected with the radiation microstrip 1 and a radio frequency signal source are arranged on the first surface of the substrate 4; a ground layer 2 is arranged on the second surface of the substrate 4, the first surface and the second surface are opposite, and the ground layer 2 covers all or part of the feed line 5 on the second surface; the radiation power of the radiation microstrip 1 is adjustable.
In the present embodiment, the substrate 4 is preferably, but not limited to, an FR-4 epoxy laminated glass cloth board; the substrate 4 is preferably, but not limited to, in a rectangular parallelepiped shape, and the dimensions are preferably, but not limited to, 80mm, 50mm, and 1mm in length, height, and thickness, respectively; the radiating microstrip 1 and the ground layer 2 are preferably, but not limited to, formed by copper-clad on the substrate 4 or are metal sheets.
In the present embodiment, the feed line 5 preferably has a microstrip structure, and may be copper-clad or metal sheet.
In the present embodiment, the radiating microstrip 1 is preferably, but not limited to, a closed loop structure or an open loop structure; further, the radiating microstrip 1 may be a closed symmetrical curved structure, as shown in fig. 1, and the two-dimensional pattern of the antenna module of this structure is shown in fig. 4, which shows that the antenna module has good omni-directionality. The length of the radiating microstrip 1 can be adjusted according to the frequency of the radio frequency signal, and the length of the radiating microstrip 1 is in direct proportion to the frequency of the radio frequency signal. In order to save the layout space of the radiating microstrip 1, the radiating microstrip 1 may be designed to be curved.
In the present embodiment, the ground plane 2 is preferably, but not limited to, a ground or earth connection of a radio frequency signal source.
In a preferred embodiment, the output power of the radio frequency signal source connected to the feeder 5 is adjustable; and/or the feeder line 5 is connected with a power adjusting unit 3 in series to realize the adjustable radiation power of the radiation microstrip. Specifically, one of the following three ways is adopted, the way one: the output power of the radio frequency signal source is adjustable, for example, the radio frequency signal source with adjustable output power can be selected; the second method comprises the following steps: the output power of the radio frequency signal source is not adjustable, and a power adjusting unit 3 is connected in series on a feeder 5, as shown in fig. 1 and 2; the third method comprises the following steps: the output power of the radio frequency signal source is adjustable, and meanwhile, the feeder 5 is connected with the power adjusting unit 3 in series to realize two-stage adjustment, and the radio frequency signal source can be used for rough adjustment and the power adjusting unit 3 can be used for fine adjustment.
In this embodiment, the rf signal source is preferably, but not limited to, an existing vector signal source and a power amplifier with adjustable output power, an output end of the vector signal source is connected to an input end of the power amplifier, and an output end of the power amplifier is connected to the feeder; the radio frequency signal source can also select a radio frequency comprehensive tester (such as CMD200 or CMW 500) with adjustable output power, or select the existing GSM and 3G radio frequency module products with difficultly-adjusted output power.
In the present embodiment, the power adjusting unit 3 is preferably, but not limited to, a radio frequency power amplifier, or a power attenuator, or a radio frequency power amplifier and a power attenuator connected in series. The radio frequency power amplifier amplifies power, so that the radiation power of the radiation microstrip 1 is increased, and the radiation intensity is increased; the power attenuator realizes the reduction of power, so that the radiation power of the radiation microstrip 1 is reduced, and the radiation intensity is reduced. The rf power amplifier may adopt a circuit structure disclosed in the prior art, for example, a circuit structure disclosed in chinese patent with publication No. CN103812463A or CN106533374A may be selected, or a circuit structure disclosed in http:// www.elecfans.com/dianlutu/195/20180305643053057. html may be selected, and the selection of a device in a specific circuit needs to be combined with a frequency band and a modulation method of an rf signal, which is not described herein again for the prior art. The power attenuator is preferably, but not limited to, a T-type, a pi-type and a bridge-type power attenuation resistor network, and the specific circuit structure can refer to the circuit structure disclosed in the prior art https:// wenku.baidu.com/view/81468c30777 f5acfa1c7aa00b52ac789eb9f9e.html, and will not be described herein again.
In a preferred embodiment, as shown in fig. 1 and 2, the power conditioning unit 3 comprises a conditioning resistor, which is connected in series to the feeder 5.
In the present embodiment, a single adjusting resistor, which is simple and easy to machine and implement, is used as the power adjusting unit. The radiation efficiency of the radiation microstrip 1 (the radiation efficiency is a percentage value of the actual radiation power of the radiation microstrip 1 and the output power of the radio frequency signal source, or a percentage value of the difference value of the output power of the radio frequency signal source and the power of the adjusting resistor and the output power of the radio frequency signal source) can be flexibly adjusted by using the adjusting resistor loaded with different resistance values, so that the purpose of highly simulating the radiation of electromagnetic waves to the free space in the automobile in the processes of communication, internet surfing, video and the like of terminal equipment such as a mobile phone and the like is achieved.
In this embodiment, the purpose of adding the resistor mainly absorbs part of energy to reduce the radiation efficiency of the antenna, so as to highly simulate the actual situation that the power finally radiated from the terminal equipment is smaller than the set power due to the terminal equipment shell, the antenna installation and the like after the terminal equipment such as a mobile phone outputs the set power through an internal power amplifier (for example, set to 33dBm of the maximum GSM power transmission during a call). Preferably, the resistance value range of the adjusting resistor is 0 to 500 Ω, and the radiation efficiency curves of the radiating microstrip 1 corresponding to different resistance values of the adjusting resistor are shown in fig. 3, which shows that the larger the resistance value is, the more energy is absorbed, and the lower the radiation efficiency of the antenna is. Therefore, the validity and consistency of test data in different test sites and different laboratories can be ensured.
In an application scenario of this embodiment, the terminal device is a mobile phone, the output power of the radio frequency signal source is set to the maximum GSM transmitting power in the GSM call mode of the mobile phone, for example, 33dBm, and the adjusting resistor is connected in series to the feeder line 5. The resistance value of the adjusting resistor is determined according to the previously measured power attenuation ratio (corresponding to the radiation efficiency in fig. 3) of the mobile phones of different manufacturers, and the corresponding resistance value of the adjusting resistor in the relation curve between the radiation efficiency and the resistance value of the adjusting resistor shown in fig. 3, and preferably, the resistance value of the adjusting resistor can be selected within the range of 0 to 150 Ω. The electromagnetic radiation under the mobile phone conversation state in the vehicle can be conveniently and rapidly tested and researched.
In a preferred embodiment, the system further comprises a radio frequency signal input interface, an input end of the radio frequency signal input interface is connected with an output end of the radio frequency signal source, and an output end of the radio frequency signal input interface is connected with an input end of the feeder 5.
In this embodiment, the radio frequency signal input interface is preferably, but not limited to, an SMA radio frequency connector, and the SMA radio frequency connector is connected to the radio frequency signal source through a radio frequency cable with a shielding layer, and preferably, the ground layer 2 is connected to the shielding layer of the radio frequency cable.
The utility model also discloses an in-vehicle electromagnetic radiation testing system, in a preferred embodiment, the system includes a microwave darkroom, a vehicle positioned in the microwave darkroom, a radio frequency signal source, the antenna module arranged in the vehicle, and at least one electromagnetic detection unit arranged in the vehicle; the radio frequency signal source is arranged on the antenna module or is arranged separately from the antenna module, and the output end of the radio frequency signal source is connected with the input end of the feeder line 5; the electromagnetic detection unit detects the size of electromagnetic radiation in the vehicle.
In the present embodiment, the electromagnetic detection unit is preferably, but not limited to, an electromagnetic radiation detector or an electromagnetic radiation sensor. The electromagnetic radiation detector is preferably but not limited to an electromagnetic frequency selector SRM3006, TES-92, a full-band electromagnetic radiation measuring instrument set EMF1(1kHz to 6GHz) or a vector signal source, and the electromagnetic radiation sensor adopts a structure disclosed by the prior publication No. CN102326255B or CN 202421347U, a Hall sensor and the like. Preferably, the device is provided with an electro-optical conversion module and a photoelectric conversion module, the output end of the electromagnetic detection unit is connected with the electrical input end of the electro-optical conversion module, the optical output end of the electro-optical conversion module is connected with the optical input end of the photoelectric conversion module, and the electrical output end of the photoelectric conversion module is connected with the signal input end of the external control module. Electromagnetic intensity signals obtained by detection of the electromagnetic detection unit are transmitted to the outside of the microwave darkroom through the electro-optical conversion module and the photoelectric conversion module so as to prevent the signals from interfering with an electromagnetic field of the microwave darkroom and affecting the test precision, and the specific structures and principles of the electro-optical conversion module and the photoelectric conversion module are not repeated herein, and refer to the technical schemes disclosed in the prior art with the patent publication numbers of CN208112812U and CN 208614087U.
In the present embodiment, when the rf signal source is separated from the antenna module, the vector signal source may be added with a power amplifier, and the rf signal source may be disposed inside or outside the microwave darkroom, and when disposed outside the microwave darkroom, transmits the rf signal to the feeder 5 of the antenna module through the rf cable; when the rf signal source is disposed on the antenna module, the rf signal source may be a GSM rf module or a 3G rf module, and the specific circuit structure may refer to a circuit formed by an rf transceiver chip, a baseband chip, and an rf impedance matching network of a terminal device such as a mobile phone, and the like, which is not described herein again.
In a preferred embodiment, as shown in fig. 5, when the electromagnetic detection unit is plural, the plural electromagnetic detection units are located at different positions in the vehicle.
In the present embodiment, it is preferable that the electromagnetic detection unit be located at different positions of the seat.
In a preferred embodiment, the device further comprises a plurality of dummy persons respectively placed in the driving seat and the passenger seat, and electromagnetic detection units are arranged at different organ parts of the dummy persons and the hand contactable area of the driver in the driving seat.
In the present embodiment, it is preferable that the electromagnetic detection unit is disposed at a position simulating a critical organ portion of a human body such as a brain, a chest, a liver, a crotch, and a foot portion, and at a hand-contactable region of a driver.
In a preferred embodiment, the electromagnetic detection device further comprises a control module, a first control end of the control module is connected with a control end of the radio frequency signal source, and a signal input end of the control module is connected with a signal output end of the electromagnetic detection unit.
In this embodiment, the control module is preferably, but not limited to, a computer or an embedded processor, and may be connected to the radio frequency signal source through a PBIO instrument connection line or a serial line, so as to control the start of the radio frequency signal source, and output the frequency band and the power strength of the radio frequency signal. The control module can be connected with the electromagnetic detection unit through the A/D pin or the serial port and receives an electromagnetic intensity signal detected by the electromagnetic detection unit.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (6)
1. An antenna module for simulating terminal radiation is characterized by comprising a substrate;
a radiation microstrip and a feeder line connected with the radiation microstrip and a radio frequency signal source are arranged on the first surface of the substrate;
a grounding layer is arranged on the second surface of the substrate, the first surface and the second surface are opposite, and the grounding layer covers all or part of the feeder line on the second surface;
the radiation power of the radiation microstrip is adjustable.
2. The antenna module for simulating terminal radiation according to claim 1, wherein an output power of a radio frequency signal source connected to the feeder line is adjustable;
or a power regulating unit is connected in series on the feeder line.
3. The antenna module for simulating terminal radiation according to claim 2, wherein said power conditioning unit includes a conditioning resistor, said conditioning resistor being connected in series to said feed line.
4. An in-vehicle electromagnetic radiation testing system, comprising a microwave darkroom, a vehicle positioned in the microwave darkroom, a radio frequency signal source, an antenna module according to any one of claims 1 to 3 positioned in the vehicle, and at least one electromagnetic detection unit arranged in the vehicle;
the radio frequency signal source is arranged on the antenna module or is arranged separately from the antenna module, and the output end of the radio frequency signal source is connected with the input end of the feeder line;
the electromagnetic detection unit detects the size of electromagnetic radiation in the vehicle.
5. The in-vehicle electromagnetic radiation testing system of claim 4, wherein when the electromagnetic detection unit is plural, the plural electromagnetic detection units are located at different positions in the vehicle.
6. The in-vehicle electromagnetic radiation testing system of claim 4 or 5, further comprising a plurality of dummy persons respectively placed at the driving seat and the passenger seat, wherein electromagnetic detection units are arranged at different organ parts of the dummy persons and the hand contactable area of the driver seat.
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| CN201922224209.7U CN210897618U (en) | 2019-12-12 | 2019-12-12 | Antenna module for simulating terminal radiation and in-vehicle electromagnetic radiation test system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110994152A (en) * | 2019-12-12 | 2020-04-10 | 中国汽车工程研究院股份有限公司 | Antenna module for simulating terminal radiation, and in-vehicle electromagnetic radiation testing system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110994152A (en) * | 2019-12-12 | 2020-04-10 | 中国汽车工程研究院股份有限公司 | Antenna module for simulating terminal radiation, and in-vehicle electromagnetic radiation testing system and method |
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