CN116827452B - Internet of things communication terminal antenna debugging device - Google Patents
Internet of things communication terminal antenna debugging device Download PDFInfo
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- CN116827452B CN116827452B CN202311098831.2A CN202311098831A CN116827452B CN 116827452 B CN116827452 B CN 116827452B CN 202311098831 A CN202311098831 A CN 202311098831A CN 116827452 B CN116827452 B CN 116827452B
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- 238000004891 communication Methods 0.000 title claims abstract description 19
- 238000012360 testing method Methods 0.000 claims description 26
- 230000005855 radiation Effects 0.000 claims description 10
- 239000011358 absorbing material Substances 0.000 claims description 7
- 238000004364 calculation method Methods 0.000 claims description 6
- 238000013500 data storage Methods 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 4
- 239000012780 transparent material Substances 0.000 claims description 4
- 239000000696 magnetic material Substances 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 25
- 230000008569 process Effects 0.000 abstract description 21
- 238000011160 research Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000004904 shortening Methods 0.000 abstract 1
- 230000001276 controlling effect Effects 0.000 description 15
- 238000010586 diagram Methods 0.000 description 12
- 230000008859 change Effects 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 239000011889 copper foil Substances 0.000 description 5
- 241001092489 Potentilla Species 0.000 description 3
- 230000005670 electromagnetic radiation Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000012827 research and development Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
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- 230000005672 electromagnetic field Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/101—Monitoring; Testing of transmitters for measurement of specific parameters of the transmitter or components thereof
- H04B17/102—Power radiated at antenna
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/02—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical movement of antenna or antenna system as a whole
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/11—Monitoring; Testing of transmitters for calibration
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/15—Performance testing
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Abstract
The application discloses an antenna debugging device of an internet of things communication terminal, which comprises a sliding guide rail, a control host, a voltage standing wave ratio measuring instrument, an antenna turntable to be debugged, a space standing wave generating device and a distance measuring device, wherein the voltage standing wave ratio measuring instrument is connected with the control host; the antenna turntable to be debugged is arranged at one end of the sliding guide rail, and the space standing wave generating device is arranged on the sliding guide rail in a sliding manner; the voltage standing wave ratio measuring instrument is electrically connected with the antenna to be debugged, the antenna port of the antenna to be debugged outputs carrier signals with corresponding frequencies, and meanwhile, the voltage standing wave of the antenna port of the antenna to be debugged is tested; the distance measuring device is used for detecting the distance between the antenna turntable to be debugged and the space standing wave generating device and feeding the distance back to the control host. The device can obtain the performance condition of the antenna gain and the efficiency without adjusting the wireless terminal to be debugged when the standing-wave ratio is measured, so that the device is beneficial to quickly determining the basic performance condition of the antenna in the process of antenna debugging, thereby improving the antenna debugging efficiency and shortening the research, development and debugging period.
Description
Technical Field
The application relates to the technical field of communication of the Internet of things, in particular to an antenna debugging device of a communication terminal of the Internet of things.
Background
In the process of research and debugging of a terminal antenna, the performance of the Voltage Standing Wave Ratio (VSWR) of the antenna and the radiation gain and efficiency of the antenna need to be simultaneously evaluated. According to the antenna theory, the voltage standing wave ratio of the antenna port is related to the input impedance of the antenna port, and is a parameter for representing the good or bad matching performance of the input impedance of the antenna port. The standing wave ratio is small when the input impedance is matched, and the energy radiated into the antenna is large. Instead, the standing wave ratio is large, which means that the input impedance of the antenna is not matched with the interface, a part of the input signal power is reflected due to the mismatch of the interface, and the reflected signal and the input signal are superimposed to form standing waves. In the wireless terminal antenna debugging test, the smaller and better the standing-wave ratio in the required frequency band is required, the standing-wave ratio is generally required to be less than or equal to 1.5. The standing wave ratio test generally adopts a single port of a vector network analyzer and is connected to a terminal antenna to be debugged. As shown in fig. 1, which is a schematic diagram of a typical internet of things terminal for testing standing wave ratio in the process of antenna debugging, a vector network analyzer is adopted, one port of the vector network analyzer is connected to an internet of things terminal antenna to be debugged through a testing feeder line, and the metal structure of the antenna area of the terminal antenna to be debugged is continuously changed in the process of debugging to improve the antenna performance.
The antenna efficiency is defined as the ratio of the radiation power to the input power of the antenna, and is characterized by the strength of the radiation capability of the antenna, and factors influencing the radiation efficiency of the antenna mainly influence the mutual influence of the antenna structure and the position relation between the antenna and a metal structural member such as a terminal main board.
The antenna gain is the ratio of the square of the field strength generated by the antenna at a point in space to the square of the electric field generated by an ideal non-directional point source antenna in the same direction at the same input power. According to definition, the antenna gain can also represent the ratio of the Potentilla vector density of the antenna in a certain direction, and the value of the antenna efficiency can be obtained by integrating the ratio in a three-dimensional space, and the antenna gain has correlation with the antenna efficiency. The gain and efficiency of the antenna are typically measured by a vector network analyzer and an all-anechoic chamber, where the performance of the OTA in the 3-dimensional direction is measured. As shown in fig. 2, a schematic diagram of the architecture of a typical multi-probe darkroom measurement terminal antenna efficiency and gain. As shown in fig. 2, two ports of the vector network analyzer are respectively connected with an antenna to be debugged and a measuring antenna of the darkroom, and the inside of the darkroom is provided with a change-over switch, so that the ports of the vector network analyzer are not directly connected with the antenna of the terminal to be debugged, but are connected with the change-over switch of the darkroom.
When the standing wave ratio of the test antenna is required to be generally performance, the test antenna is debugged and confirmed on a working table outside a darkroom by adopting a vector network analyzer; in the actual terminal antenna research and development early-stage debugging process, the common practice is to use copper foil to be attached to an antenna area in the terminal, and repeatedly measure the standing wave ratio of the antenna, the antenna efficiency and the antenna gain by changing the size and the structure of the copper foil. In the process of testing the antenna efficiency and the gain, a terminal antenna to be debugged needs to be placed on a darkroom center turntable, a person cannot get close to the antenna copper foil to debug and change, and if the antenna to be changed is required to be changed, the wireless equipment to be debugged needs to be taken down to debug and confirm. After the structure of the copper foil meeting the performance requirement is finally determined, the antenna sample of the corresponding FPC or other metal materials is designed according to the structure of the copper foil, and the antenna performance is again confirmed, so that the basic process of mass production is finally achieved. In the process, huge experimental verification is required to be carried out due to the fact that repeated debugging and verification are required, the sites and methods are different when the standing wave ratio of the antenna and the efficiency gain of the antenna are tested, the antenna of the terminal to be debugged is directly connected to one port of the vector network analyzer, the terminal to be debugged is required to be placed in an electric wave darkroom when the efficiency and the gain of the antenna are tested, the port of the vector network analyzer is required to be connected to the darkroom, the port is repeatedly disassembled and assembled in the debugging process, the measuring position of the antenna to be debugged is also repeatedly changed, the workload is increased, and meanwhile uncertainty and equipment loss are caused.
As can be seen from the above description, in the process of developing and debugging the antenna of the wireless terminal, the standing wave ratio, the antenna efficiency and the antenna gain of the antenna need to be simultaneously confirmed. In the process of confirming the standing-wave ratio performance of the antenna and the process of confirming the gain and the efficiency of the antenna, the adopted equipment and method are different, the port is repeatedly disassembled and assembled in the debugging process, the antenna to be debugged also repeatedly changes the measuring position, so that the workload is increased, and meanwhile, the uncertainty and the equipment loss are increased.
Disclosure of Invention
The application aims to provide an antenna debugging device for an Internet of things communication terminal.
The technical scheme adopted by the application is as follows:
an antenna debugging device of an internet of things communication terminal comprises a sliding guide rail, a control host, a voltage standing wave ratio measuring instrument, an antenna turntable to be debugged, a space standing wave generating device and a distance measuring device, wherein the voltage standing wave ratio measuring instrument is connected with the control host;
the antenna turntable to be debugged is arranged at one end of the sliding guide rail, and the space standing wave generating device is arranged on the sliding guide rail in a sliding manner;
the antenna turntable to be debugged comprises a supporting base, a Phi angle rotating device rotating around a Z axis is arranged on the supporting base, a horizontal platform is fixedly arranged at the upper end of the Phi angle rotating device, a Theta angle rotating device is fixedly arranged on the upper surface of the horizontal platform, and an antenna to be debugged is detachably arranged on the Theta angle rotating device; further, as a feasible implementation mode, the support base is provided with a vertical Z-axis rotating shaft, and the bottom of the Phi angle rotating device is sleeved on the Z-axis rotating shaft and rotates; the Theta angle rotating device is provided with a Y-axis rotating shaft, and an antenna to be debugged is detachably arranged on the Y-axis rotating shaft and rotates around the Y-axis to realize the adjustment of the pitching angle;
the voltage standing wave ratio measuring instrument is electrically connected with the antenna to be debugged, the antenna port of the antenna to be debugged outputs carrier signals with corresponding frequencies, and meanwhile, the voltage standing wave of the antenna port of the antenna to be debugged is tested; the distance measuring device is used for detecting the distance between the antenna turntable to be debugged and the space standing wave generating device and feeding back the distance to the control host;
the space standing wave generating device forms standing waves on the antenna radiation electromagnetic wave in a specific area and direction, and comprises an inner side structural body, an outer side structural body and at least one reflector, wherein the reflector generates the space standing waves and is connected with a reflector rotating shaft; the reflector rotating shaft is arranged on the outer structural body and rotates around the X axis; the inner side structure body is an inner cavity structure, and the reflector generates different states exposed outside the cavity and hidden in the cavity through different angles of rotation of the reflector rotating shaft; the reflector plays a role in generating a space standing wave when being exposed outside the cavity, and the reflector can not generate the space standing wave when being hidden in the cavity; the reflector has switching means to control the reflector to switch to different states;
the control host is used for controlling and reading test data of the antenna voltage standing wave ratio measuring instrument, controlling the rotation angle of the antenna turntable to be debugged, controlling the sliding of the sliding guide rail by the control host so as to adjust the interval between the space standing wave generating device and the antenna turntable to be debugged, controlling the size and the area of the space standing wave generating device for generating the space standing wave, and controlling the distance measuring device to detect the distance and return the distance data.
Further, the control host has a data storage unit for storing at the time of system calculation and data reading, and a data operation unit for processing calculation of system data.
Further, a fixing clamp is arranged at the upper end of the Theta angle rotating device, and the antenna to be debugged is fastened through the fixing clamp.
Further, the bottom surfaces of the two ends of the sliding guide rail are supported and fixed through the device supporting frame.
Further, the voltage standing wave ratio measuring instrument is connected with the antenna to be debugged through a measuring connection cable.
Further, the voltage standing wave ratio measuring instrument adopts a vector network analyzer or adopts a combination of a signal source and an oscilloscope to realize the same function.
Further, the space standing wave generating device is also provided with a reflector sensing device, and the reflector sensing device senses the current reflector to obtain the state of the current reflector.
Further, a wave absorbing material is paved on a side plane of an inner side structure body and an outer side structure body of the space standing wave generating device, which faces the direction of the antenna to be debugged; the wave-absorbing material is used for protecting other structural parts, so that signal reflection is reduced, and test precision is improved.
Further, the reflectors are connected to the reflector rotating shaft through a radio frequency transparent material, and the rotation angle of the reflector rotating shaft is controlled to control the reflectors which act.
Further, different types of reflectors are connected to the reflector shaft by a connection device, and the different types include, but are not limited to, the size, shape and material of the reflectors, and the different types are selected to generate different spatial standing waves to adapt to test requirements of different antenna types and frequency bands.
Further, the reflector employs a conductivity greater than 3.0X10 7 The S/m metal material is molded, or a uniform dielectric plate is adopted, or a magnetic material with a phase deviation function is adopted, so that space standing waves in different states are generated.
Further, the reflector adopts a planar structure of the emitting plate or adopts a reflecting plate with an arc structure.
Specifically, the reflector with the radian structure is used for correcting reflection errors caused by incomplete plane waves of an electromagnetic field due to the distance between the reflector and the antenna to be debugged, and is used for correcting parameter correction during the radiation performance test of the antenna.
Further, the reflecting plate of the reflector is circular.
By adopting the technical scheme, the application can obtain the data of the standing wave ratio of the antenna, the gain of the antenna and the efficiency of the antenna on the premise of not disassembling the antenna. The application is applied to the wireless terminal antenna debugging process, improves the antenna debugging method, improves the antenna debugging efficiency, and reduces the abrasion of system equipment and prolongs the service life as the test system is reduced to switch feeder line connection. According to the application, in the process of debugging the antenna of the wireless terminal, the performance conditions of antenna gain and efficiency can be obtained without adjusting the wireless terminal to be debugged when the standing wave ratio is measured, so that the basic performance conditions of the antenna can be rapidly determined in the process of debugging the antenna, the antenna debugging efficiency is improved, and the research and development debugging period is shortened.
Drawings
The application is described in further detail below with reference to the drawings and detailed description;
FIG. 1 is a schematic diagram of a typical wireless terminal antenna standing wave ratio test architecture;
FIG. 2 is a schematic diagram of an exemplary wireless terminal antenna efficiency gain test architecture;
fig. 3 is a schematic structural diagram of an antenna debugging device for an internet of things communication terminal according to the present application;
FIG. 4 is a schematic diagram showing the front view of the spatial standing wave generating device;
FIG. 5 is a schematic diagram of a left-hand structure of a spatial standing wave generating device;
FIG. 6 is a schematic diagram of a spatial standing wave generating device of a plurality of reflectors;
FIG. 7 is a schematic view of a planar structure reflector;
FIG. 8 is a schematic diagram of a circular arc structured reflector;
FIG. 9 is a schematic diagram of the spatial standing wave generation principle;
FIG. 10 is a schematic diagram of a typical application of a rectangular reflector;
fig. 11 is a schematic diagram of a typical application of a circular reflector.
Description of the embodiments
In order to make the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application.
When the antenna actually works, radio frequency signals fed in through the radio frequency cable are converted into electromagnetic waves to radiate to the surrounding space. The antenna has directivity, so that the electromagnetic wave signals radiated in different directions are different. In addition, the outward radiated signals encounter the barriers and can generate reflection with different degrees according to the structures and materials of different barriers, and the reflected signals and the signals radiated by the antenna are overlapped to form standing waves. Based on this, the magnitude of the spatial standing wave signal formed by the spatial radiation is fed back on the radio frequency port of the antenna. When the antenna standing wave is measured on the antenna radio frequency port, the antenna port standing wave test result can be found to change along with the change of the antenna structure and the change of the space structure around the antenna. For this reason, for strict antenna port standing wave measurement, it is necessary to use an open space or anechoic chamber to avoid that reflection of electromagnetic waves in the space affects the test result. In practical engineering application, in the process of debugging an antenna of an internet of things terminal, an engineer can test standing wave ratio of the antenna while debugging for convenience in debugging, and in the process of debugging, the engineer is often close to the antenna, and the engineer can judge standing wave ratio test errors caused by reflecting objects in space through experience. As shown in fig. 9, the antenna reflects electromagnetic waves by electromagnetic radiation encountering obstacles a and B in the space, respectively, and the superposition of the incident wave and the reflected wave at the antenna port forms a standing wave ratio to a certain extent.
As shown in one of fig. 3 to 11, the application discloses an antenna debugging device of an internet of things communication terminal, which comprises a sliding guide rail 2, a control host 9, a voltage standing wave ratio measuring instrument 7 connected with the control host 9, an antenna turntable to be debugged, a space standing wave generating device and a distance measuring device;
the antenna turntable to be debugged is arranged at one end of the sliding guide rail 2, and the space standing wave generating device is arranged on the sliding guide rail 2 in a sliding manner; the distance between the antenna turntable to be debugged and the space standing wave generating device can be controlled based on the sliding guide rail.
The antenna turntable to be debugged comprises a support base 1, wherein a Phi angle rotating device 401 rotating around a Z axis is arranged on the support base 1, a horizontal platform 402 is fixedly arranged at the upper end of the Phi angle rotating device 401, a Theta angle rotating device 403 is fixedly arranged on the upper surface of the horizontal platform 402, and an antenna 5 to be debugged is detachably arranged on the Theta angle rotating device 403; further, as a possible implementation manner, the support base 1 is provided with a vertical Z-axis rotating shaft, and the bottom of the Phi angle rotating device 401 is sleeved on the Z-axis rotating shaft and rotated; the Theta angle rotating device 403 is provided with a Y-axis rotating shaft, and the antenna 5 to be debugged is detachably arranged on the Y-axis rotating shaft and rotates around the Y axis to realize the adjustment of the pitching angle;
further, a fixing jig is provided at the upper end of the Theta angle rotation device 403, and the antenna 5 to be debugged is fastened by the fixing jig. The direction of the antenna towards the space standing wave generating device can be controlled through the antenna turntable to be debugged.
The voltage standing wave ratio measuring instrument 7 is electrically connected with the antenna 5 to be debugged, the antenna port of the antenna 5 to be debugged outputs carrier signals with corresponding frequencies, and meanwhile, the voltage standing wave of the antenna port of the antenna 5 to be debugged is tested; the distance measuring device is used for detecting the distance between the antenna turntable to be debugged and the space standing wave generating device and feeding the distance back to the control host 9.
The space standing wave generating device comprises an inner structural body 602 and an outer structural body 601, and at least one reflector 604, wherein the reflector 604 generates space standing waves and is connected with a reflector rotating shaft; the reflector spindle is mounted on the outer structure 601, the reflector spindle rotating about the X-axis; the inner structure 602 is an internal cavity structure, and the reflector generates different states exposed outside the cavity and hidden in the cavity through different angles of rotation of the reflector rotating shaft; the reflector 604 functions to generate a spatial standing wave when exposed outside the cavity, and the reflector 604 does not generate a spatial standing wave when hidden inside the cavity; the reflector 604 has switching means to control the reflector 604 to switch to different states; the space standing wave generating device can form standing waves for the electromagnetic waves radiated by the antenna in a specific area and direction, and the size of the space standing waves can be controlled and regulated by the space standing wave generating device;
the control host 9 is used for controlling and reading test data of the antenna voltage standing wave ratio measuring instrument, controlling the rotation angle of the antenna turntable to be debugged, controlling the sliding of the sliding guide rail 2 by the control host 9 so as to adjust the interval between the space standing wave generating device and the antenna turntable to be debugged, controlling the space standing wave generating device to generate the space standing wave size and area, and controlling the distance measuring device to detect the distance and return the distance data.
Further, the control host 9 has a data storage unit for storing at the time of system calculation and data reading, and a data operation unit for processing calculation of system data.
Further, the bottom surfaces of the two ends of the sliding guide rail 2 are supported and fixed by the device supporting frame 3.
The effect of the reflectors on standing waves varies from distance to distance: when the antenna radiates external electromagnetic radiation, the electromagnetic wave radiates external, and the power density of the electromagnetic wave is reduced along with the increase of the distance, namely, the Potentilla vector is reduced along with the transmission distance. For this reason, the reflected signal generated by the reflector decreases with increasing distance. In addition, the phase of the reflected signal generated by the reflector changes with the change of the distance, and therefore the standing wave ratio caused by the reflected signal changes due to the change of the phase of the reflected signal. The same reflector has different angles between the antenna and the reflecting surface formed by the reflector at different distances. The position of the reflector is different from the Potentilla vector, the reflected signal formed by the reflector is overlapped with the incident signal at the antenna port, and the magnitude and the phase of the reflected signal are also related to the distance between the reflector.
Further, the voltage standing wave ratio measuring instrument 7 is connected with the antenna 5 to be debugged through a measuring connection cable 8.
Further, the voltage standing wave ratio measuring instrument 7 adopts a vector network analyzer, or adopts a combination of a signal source and an oscilloscope to realize the same function.
Further, the spatial standing wave generating device further comprises a reflector sensing device, and the reflector sensing device senses the current reflector 604 to obtain the state of the current reflector 604.
Further, a wave absorbing material 603 is laid on a side plane of the inner side structure 602 and the outer side structure 601 of the space standing wave generating device, which faces the direction of the antenna 5 to be tuned; the wave absorbing material 603 is used for protecting other structural parts, so that signal reflection is reduced, and testing accuracy is improved. The spatial standing wave generating device does not generate electromagnetic reflection in other structures besides the reflector. Reducing space standing wave interference; the wave absorbing material 603 is used for protecting other structural parts, so that signal reflection is reduced, and testing accuracy is improved.
Further, a plurality of reflectors 604 are coupled to the reflector shaft via a radio frequency transparent material, and the rotation angle of the reflector shaft is controlled to control the functioning reflectors 604.
Further, different types of reflectors 604 are coupled to the reflector shaft by coupling means, including but not limited to the size and shape and materials of the reflectors 604, with different types being selected to create different spatial standing waves to accommodate testing requirements of different antenna types and frequency bands.
In particular, different reflector shapes are used for different electromagnetic waves, and typical applications are rectangular and circular reflector shapes. Rectangular reflectors can be used to form relatively uniform spatial standing waves for linearly polarized electromagnetic waves. For circularly polarized or elliptically polarized electromagnetic radiation, a circular reflector is used to form a relatively uniform and stable spatial standing wave. As shown in fig. 10 and 11, a typical application of two-shape reflectors is schematically illustrated.
The reflectors with different sizes can form reflections with different areas in space, and under the condition that the distance between the reflectors and the radiation antenna is the same, the larger the reflecting area is, the larger the reflected signal power is, so that the spatial standing waves with different sizes can be generated. In addition, for electromagnetic wave signals with different frequencies, the wavelengths in the space are different, and for electromagnetic waves with longer wavelengths, a reflecting surface with enough area is needed to form enough reflected signals. Otherwise, adequate reflection may not be formed due to diffraction of the undersized signal from the reflector.
Further, the reflector 604 employs a conductivity greater than 3.0X10 7 S/m metal material molding or adopting a uniform dielectric plate; or is formed by adopting a magnetic material with a phase deviation function so as to generate spatial standing waves in different states.
Further, the reflector 604 adopts a planar structure of a reflecting plate, or adopts a reflecting plate with an arc structure.
Specifically, the reflector 604 with the radian structure corrects reflection errors caused by incomplete plane waves of an electromagnetic field due to the distance between the reflector 604 and the antenna 5 to be debugged, and is used for correcting parameter correction in the antenna radiation performance test. As shown in fig. 7 and 8, fig. 7 shows a planar structure reflector, and fig. 8 shows a schematic view of a circular arc structure reflector.
The effect difference of the cambered surface reflector for generating standing waves is as follows: the electromagnetic wave signal radiated by the antenna can be approximated as a plane wave when the distance is sufficiently large, and the original analysis and calculation of the plane wave are relatively simple. However, in practical engineering applications, since the reflector cannot be sufficiently distant from the antenna, the electromagnetic wave cannot be regarded as a plane wave on the reflector, and for this reason, some of the electromagnetic wave reflection caused by the reflector escapes in other directions. For this purpose, the use of a curved reflector can correct to some extent errors caused by this factor. Of course, such errors can be corrected for data compensation by experimental measurements.
According to the technical scheme, the space standing wave generating device is arranged on the sliding guide rail in a sliding mode, and the distance between the antenna turntable to be debugged and the space standing wave generating device can be controlled through the sliding guide rail. The reflector can generate space standing waves, and is connected with the reflector rotating shaft through electromagnetic transparent materials, and the reflector rotating shaft is arranged on the outer structural body and can be controlled to rotate around the X axis. The inner side structure body is in an inner cavity structure, and the reflector generates different states exposed outside the cavity and hidden in the cavity through different angles of rotation of the reflector rotating shaft. The state that the corresponding reflector is exposed outside the cavity may function to generate a spatial standing wave, and the state that the corresponding reflector is hidden inside the cavity may not generate a spatial standing wave. The reflector has switching means which control the reflector to switch to different states. The space standing wave generating device can form standing waves for the electromagnetic waves radiated by the antenna in a specific area and direction, and the size of the space standing waves can be controlled and regulated by the space standing wave generating device; the control host is used for controlling and reading test data of the antenna voltage standing wave ratio measuring instrument, controlling the rotation angle of the antenna turntable to be debugged, controlling the sliding of the sliding guide rail by the control host so as to adjust the distance between the space standing wave generating device and the antenna turntable to be debugged, controlling the space standing wave generating device to generate the size and the area of the space standing wave, and controlling the distance measuring device to detect the distance and return the distance data.
The application can obtain the data of the standing wave ratio of the antenna, the gain of the antenna and the efficiency of the antenna on the premise of not disassembling the antenna. The application is applied to the wireless terminal antenna debugging process, improves the antenna debugging method, improves the antenna debugging efficiency, and reduces the abrasion of system equipment and prolongs the service life as the test system is reduced to switch feeder line connection. According to the application, in the process of debugging the antenna of the wireless terminal, the performance conditions of antenna gain and efficiency can be obtained without adjusting the wireless terminal to be debugged when the standing wave ratio is measured, so that the basic performance conditions of the antenna can be rapidly determined in the process of debugging the antenna, the antenna debugging efficiency is improved, and the research and development debugging period is shortened.
It will be apparent that the described embodiments are some, but not all, embodiments of the application. Embodiments of the application and features of the embodiments may be combined with each other without conflict. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the detailed description of the embodiments of the application is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Claims (10)
1. An internet of things communication terminal antenna debugging device, which is characterized in that: the device comprises a sliding guide rail, a control host, a voltage standing wave ratio measuring instrument connected with the control host, an antenna turntable to be debugged, a space standing wave generating device and a distance measuring device;
the antenna turntable to be debugged is arranged at one end of the sliding guide rail, and the space standing wave generating device is arranged on the sliding guide rail in a sliding manner;
the antenna turntable to be debugged comprises a supporting base, a Phi angle rotating device rotating around a Z axis is arranged on the supporting base, a horizontal platform is fixedly arranged at the upper end of the Phi angle rotating device, a Theta angle rotating device is fixedly arranged on the upper surface of the horizontal platform, a fixing clamp is arranged at the upper end of the Theta angle rotating device, the antenna to be debugged is detachably and firmly installed through the fixing clamp, and the antenna to be debugged rotates in a Y axis relative to the Theta angle rotating device to realize pitching angle adjustment in the vertical direction;
the voltage standing wave ratio measuring instrument is electrically connected with the antenna to be debugged, the antenna port of the antenna to be debugged outputs carrier signals with corresponding frequencies, and meanwhile, the voltage standing wave of the antenna port of the antenna to be debugged is tested; the distance measuring device is used for detecting the distance between the antenna turntable to be debugged and the space standing wave generating device and feeding back the distance to the control host;
the space standing wave generating device forms standing waves on the antenna radiation electromagnetic wave in a specific area and direction, and comprises an inner side structural body, an outer side structural body and at least one reflector, wherein the reflector generates the space standing waves and is connected with a reflector rotating shaft; the reflector rotating shaft is arranged on the outer structural body and rotates around the X axis; the inner side structure body is an inner cavity structure, and the reflector rotates by different angles through the rotating shaft of the reflector to generate different states exposed outside the cavity and hidden in the cavity; the reflector plays a role in generating a space standing wave when being exposed outside the cavity, and the reflector does not generate the space standing wave when being hidden in the cavity; the reflector has switching means to control the reflector to switch to different states;
the control host is used for controlling and reading test data of the antenna voltage standing wave ratio measuring instrument, controlling the rotation angle of the antenna turntable to be debugged, controlling the sliding of the sliding guide rail by the control host so as to adjust the interval between the space standing wave generating device and the antenna turntable to be debugged, controlling the size and the area of the space standing wave generating device for generating the space standing wave, and controlling the distance measuring device to detect the distance and return the distance data.
2. The internet of things communication terminal antenna debugging device according to claim 1, wherein: the control host is provided with a data storage unit and a data operation unit, wherein the data storage unit is used for storing system calculation and data reading, and the data operation unit is used for processing and calculating system data.
3. The internet of things communication terminal antenna debugging device according to claim 1, wherein: the bottom surfaces of the two ends of the sliding guide rail are supported and fixed by the device supporting frame.
4. The internet of things communication terminal antenna debugging device according to claim 1, wherein: the voltage standing wave ratio measuring instrument is connected with the antenna to be debugged through a measuring connecting cable; the voltage standing wave ratio measuring instrument adopts a vector network analyzer or adopts a combination of a signal source and an oscilloscope to realize the same function.
5. The internet of things communication terminal antenna debugging device according to claim 1, wherein: a wave absorbing material is paved on a plane of one side of the inner side structure body and the outer side structure body of the space standing wave generating device, which faces the direction of the antenna to be debugged; the wave-absorbing material is used for protecting other structural parts, so that signal reflection is reduced, and test precision is improved.
6. The internet of things communication terminal antenna debugging device according to claim 1, wherein: the reflector rotating shaft is perpendicular to a side plane of the outer structural body facing the direction of the antenna to be debugged, the reflector is arranged at one end of the reflector rotating shaft, and the other end of the reflector rotating shaft is arranged on the side plane of the outer structural body in a relative rotation mode.
7. The internet of things communication terminal antenna debugging device according to claim 1, wherein: the space standing wave generating device is also provided with a reflector sensing device, and the reflector sensing device senses the current reflector to obtain the state of the current reflector.
8. The internet of things communication terminal antenna debugging device according to claim 1, wherein: the reflectors of different types are connected to the reflector rotating shaft through a radio frequency transparent material, and the reflectors which act are controlled by controlling the rotating angle of the reflector rotating shaft; different types of reflectors generate different spatial standing waves to adapt to test requirements of different antenna types and frequency bands; the reflector has conductivity greater than 3.0X10 7 The S/m metal material is molded, or a uniform dielectric plate is adopted, or a magnetic material with a phase deviation function is adopted, so that space standing waves in different states are generated.
9. The internet of things communication terminal antenna debugging device according to claim 1, wherein: the reflector adopts a plane structure emitting plate or adopts a reflecting plate with an arc structure.
10. The internet of things communication terminal antenna debugging device according to claim 1, wherein: the reflecting plate of the reflector is a circular reflecting plate.
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