CN110995366B - Automatic switching device for IOT-G230 MHz radio frequency consistency test system - Google Patents
Automatic switching device for IOT-G230 MHz radio frequency consistency test system Download PDFInfo
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- CN110995366B CN110995366B CN201911124216.8A CN201911124216A CN110995366B CN 110995366 B CN110995366 B CN 110995366B CN 201911124216 A CN201911124216 A CN 201911124216A CN 110995366 B CN110995366 B CN 110995366B
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- H04B17/00—Monitoring; Testing
Abstract
The invention discloses an automatic switching device for an IOT-G230 MHz radio frequency consistency test system, which belongs to the field of programmable radio frequency switch switching units, and comprises 8 input/output ports for connecting a measuring instrument and a device to be tested; 5 power dividers are used for power dividing signals; 5 attenuators with fixed attenuation are used for reducing the signal intensity and matching the impedance; 7 one-to-two radio frequency switches, 5 one-to-three radio frequency switches and 1 one-to-four radio frequency switch for switching signal trends; the 2 combiners are used for combining signals; 1 wave trap is used as a band elimination filter to filter out useful signals and test out-of-band spurious signals; 1 limiter limits the amplitude range of the input signal; 1 circulator and radio frequency connection cable are several. The invention can realize automatic switching and automatically complete the radio frequency consistency test of the IOT-G230 MHz protocol standard by matching with a control program and a measuring instrument.
Description
Technical Field
The invention belongs to the field of programmable radio frequency switch switching units, and particularly relates to an automatic switching device for an IOT-G230 MHz radio frequency consistency test system.
Background
With the continuous development of the internet of things technology, the internet of things technology is permeating into various fields of various industries. The smart grid is a typical application of the technology of the internet of things. The 230MHz of IOT-G (Internet of things special for the thigh-Grid power) is a solution specially designed for the development trend of a power Grid, the 4G application of 5G technology and the industrialization of SingleRAN technology. The scheme has the advantages of full frequency band, interference resistance, low time delay, low power consumption, strong coverage, high safety, IPV6, network convergence and easy evolution 9. Smart grids are developing vigorously, and the number of terminals will increase by nearly 10 times. The network access test of the terminal and the base station equipment needs the support of a special measuring instrument which can complete automatic test.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides the automatic switching device for the IOT-G230 MHz radio frequency consistency test system, which is reasonable in design, overcomes the defects of the prior art and has a good effect.
In order to achieve the purpose, the invention adopts the following technical scheme:
an automatic switching device for an IOT-G230 MHz radio frequency consistency test system comprises 8 input and output ports, 5 power dividers, 5 attenuators with fixed attenuation, 7 one-to-two radio frequency switches, 6 one-to-three radio frequency switches, 1 one-to-four radio frequency switch, 2 combiners, 1 wave trap, 1 amplitude limiter, 1 circulator and a plurality of radio frequency connecting cables;
the 8 input/output ports include ANT1, ANT2, RF1, RF2, RF3, RF4, RF5, and RF 6; the ANT1 is configured to be used for connecting a base station to be tested; an ANT2 configured to be used for connecting a terminal to be tested; RF1 configured for connection to a standard base station; RF2 configured for connection to standard terminals; an RF3 configured for connecting to a source of interfering signals; an RF4 configured for connecting to a source of interfering signals; an RF5 configured to be used to connect a signal source transmitting IOT-G230 MHz standard signals; an RF6 configured for connection to an analyzer capable of analyzing and demodulating IOT-G230 MHz standard signals; all ports are connected through radio frequency connecting cables;
5 power dividers configured to perform power division of the signal;
the 5 attenuators with fixed attenuation amount comprise 23 dB fixed attenuators, 16 dB fixed attenuator, 1 fixed attenuator with 30dBm and 1 attenuator with 60 dBm;
2 combiners configured to combine the signals;
1 wave trap configured to be used as a band elimination filter, reject useful signals and test out-of-band spurious signals;
1 limiter configured to limit an amplitude range of an input signal;
1 circulator configured for signal looping along a particular direction.
2. The automatic switching device for the IOT-G230 MHz radio frequency conformance test system of claim 1, wherein: the 7 one-to-two radio frequency switches are programmable one-to-two radio frequency switches.
Preferably, the 5 one-to-three radio frequency switches are programmable one-to-three radio frequency switches.
Preferably, the 1 one-to-four radio frequency switch is a programmable one-to-four radio frequency switch.
The invention has the following beneficial technical effects:
compared with the prior art, the automatic switching device for the IOT-G230 MHz radio frequency consistency test system integrates modules required by the IOT-G230 MHz radio frequency consistency test into one device, automatically completes the radio frequency consistency test of the IOT-G230 MHz terminal and the base station by adopting a program control mode, and reduces the processes of repeatedly screwing and repeatedly pulling out radio frequency cables in the test process. The combination of the upper computer software can realize one-key operation and generate a test table, and the radio frequency consistency test efficiency of the IOT-G230 MHz terminal and the base station can be greatly improved.
Drawings
Fig. 1 is a schematic block diagram of the present invention.
Wherein, 1-a first power divider; 2-a first 3dB fixed attenuator; 3-30dBm fixed attenuator; 4-a second 3dB fixed attenuator; 5-a first one-to-two radio frequency switch; 6-a second one-to-two radio frequency switch; 7-a third one-to-two radio frequency switch; an 8-60dBm attenuator; 9-a second power divider; 10-a third power divider; 11-a first one-to-three radio frequency switch; 12-a first combiner; 13-a second one-to-three radio frequency switch; 14-a circulator; 15-a fourth one-to-two radio frequency switch; 16-a fourth power divider; 17-a fifth divide-by-two radio frequency switch; 18-6dB fixed attenuators; 19-a sixth one-to-two radio frequency switch; 20-a third one-to-three radio frequency switch; 21-a second combiner; 22-a fifth power divider; 23-a seventh first divide-by-two radio frequency switch; 24-one-to-four radio frequency switch; 25-a fourth one-to-three radio frequency switch; 26-a fifth and a sixth radio frequency switch; 27-a wave trap; 28-a limiter; 29-sixth one-to-three radio frequency switch.
Detailed Description
The invention is described in further detail below with reference to the following figures and detailed description:
an automatic switching device for an IOT-G230 MHz radio frequency consistency test system is shown in figure 1 in the original structure and comprises 8 input and output ports, 5 power dividers, 5 attenuators with fixed attenuation, 7 one-to-two radio frequency switches, 6 one-to-three radio frequency switches, 1 one-to-four radio frequency switch, 2 combiners, 1 wave trap, 1 amplitude limiter, 1 circulator and a plurality of radio frequency connecting cables;
the 8 input/output ports include ANT1, ANT2, RF1, RF2, RF3, RF4, RF5, and RF 6; the ANT1 is used for connecting a base station to be tested; the ANT2 is used for connecting a terminal to be tested; RF1 is used to connect to standard base stations; RF2 is used to connect standard terminals; the RF3 is used for connecting an interference signal source; the RF4 is used for connecting an interference signal source; the RF5 is used for connecting a signal source for transmitting IOT-G230 MHz standard signals; the RF6 is used for connecting an analyzer capable of analyzing and demodulating IOT-G230 MHz standard signals; all ports are connected through radio frequency connecting cables;
5 power dividers for dividing the signal; 1 of the power dividers is a non-isolation resistance type power divider, and 4 of the power dividers are isolated; the second power divider 9 is a power divider without isolation, and the first power divider 1, the third power divider 10, the fourth power divider 16 and the fifth power divider 22 are power dividers with isolation;
the 5 attenuators with fixed attenuation amount comprise 23 dB fixed attenuators, 16 dB fixed attenuator, 1 fixed attenuator with 30dBm and 1 attenuator with 60 dBm; the 30dBm fixed attenuator 3 is a 30W high-power fixed attenuator, the 6dB fixed attenuator 18 is a 30W high-power fixed attenuator, the first 3dB fixed attenuator 2 and the second 3dB fixed attenuator 4 are 2W fixed attenuators, and the 30dB fixed attenuator 8 is a 2W fixed attenuator.
The first combiner and the second combiner are used for combining signals;
a wave trap 27; the filter is used as a band elimination filter, useful signals are eliminated, and out-of-band spurious signals are tested;
a limiter 28 for limiting the amplitude range of the input signal;
a circulator 14 configured for looping the signal in a particular direction.
The first one-to-two radio frequency switch 5, the second one-to-two radio frequency switch 6, the third one-to-two radio frequency switch 7, the fourth one-to-two radio frequency switch 15, the fifth one-to-two radio frequency switch 17, the sixth one-to-two radio frequency switch 19 and the seventh one-to-two radio frequency switch 23 are programmable one-to-two radio frequency switches.
The first one-to-three radio frequency switch 11, the second one-to-three radio frequency switch 13, the third one-to-three radio frequency switch 20, the fourth one-to-three radio frequency switch 25, the fifth one-to-three radio frequency switch 26 and the sixth one-to-three radio frequency switch 29 are programmable one-to-three radio frequency switches.
The one-to-four rf switch 24 is a programmable one-to-four rf switch.
The RF1 is connected with the fifth one-to-two radio frequency switch 17 through a line by a fixed attenuator 3 of 30dBm, and the fifth one-to-two radio frequency switch 17 is connected with the fourth power divider 16 and the fifth power divider 22 through lines respectively;
the first power divider 1 is connected with the RF2, the first 3dB fixed attenuator 2 and the seventh first-second radio frequency switch 23 through circuits respectively; the first 3dB fixed attenuator 2 is connected with a third one-to-two radio frequency switch 7 through a line, the third one-to-two radio frequency switch 7 is connected with a second power divider 9 and a third power divider 10 through a line, the second power divider 9 is connected with a first one-to-three radio frequency switch 11 and a fourth one-to-two radio frequency switch 15 through a line, the third power divider 10 is connected with a first one-to-three radio frequency switch 11 and a one-to-four radio frequency switch 24 through a line, the first one-to-three radio frequency switch 11 is connected with a first one-to-two radio frequency switch 5 through a line, the first one-to-two radio frequency switch 5 is connected with a second 3dB fixed attenuator 4 and a 60dBm attenuator 8 through a line, and the second 3dB fixed attenuator 4 and the 60dBm attenuator 8 are connected with an ANT1 through a first one-to the second one-to-two radio frequency switch 6;
the RF3 is connected with the first combiner 12 through a line, the first combiner 12 is connected with the second one-to-three radio frequency switch 13 and the sixth one-to-two radio frequency switch 19 through lines, the sixth one-to-two radio frequency switch 19 is connected with the second combiner 21 through a line, and the second one-to-three radio frequency switch 13 is connected with the fourth one-to-two radio frequency switch 15 through the circulator 14; the fourth one-to-two radio frequency switch 15 is connected to the fourth power divider 16 through a line, the fourth power divider 16 is connected to the fifth one-to-two radio frequency switch 17 and the third one-to-three radio frequency switch 20 through lines, the third one-to-three radio frequency switch 20 is connected to the 6dB fixed attenuator 18, the fifth power divider 22 and the fourth one-to-three radio frequency switch 25 through lines, the 6dB fixed attenuator 18 is connected to the ANT2 through a line, the fifth power divider 22 is connected to the one-to-four radio frequency switch 24 through a line, the one-to-four radio frequency switch 24 is connected to the second combiner 21 and the seventh one-to-two radio frequency switch 23 through lines, the second combiner 21 is connected to the RF4 through a line, the seventh one-to-two radio frequency switch 23 is connected to the RF5 through a line, the fourth one-to-three radio frequency switch 25 is connected to the sixth one-to-three radio frequency switch 29 through a line, and the wave trap 27, the amplitude limiter 28 and the wire form a parallel circuit connected to both ends of the fifth one-to the third radio frequency switch 26 and the sixth one-three radio frequency switch 29 The fifth one-third RF switch 26 is connected to RF6 by a line.
The automatic switching device can automatically realize all test examples of the IOT-230MHz protocol standard terminal and the receiver and the transmitter of the base station by matching with 3 signal generators, 1 signal analyzer and upper computer software, wherein an ANT1 is used for connecting the base station to be tested; the ANT2 is used for connecting a terminal to be tested; RF1 is used to connect to standard base stations; RF2 is used to connect standard terminals; the RF3 is used for connecting an interference signal source; the RF4 is used for connecting an interference signal source; the RF5 is used for connecting a signal source for transmitting IOT-G230 MHz standard signals; the RF6 is used for connecting an analyzer capable of analyzing and demodulating IOT-G230 MHz standard signals, and after the connection is completed, all test examples of the transmitters and receivers of the terminal and the base station to be tested of the IOT-230MHz protocol can be completed in one step, and meanwhile, the protocol consistency test can be completed. After the test is completed, a test table may be generated.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (4)
1. An automatic switching device for an IOT-G230 MHz radio frequency conformance testing system, characterized in that: the device comprises 8 input and output ports, 5 power dividers, 5 attenuators with fixed attenuation, 7 one-to-two radio frequency switches, 6 one-to-three radio frequency switches, 1 one-to-four radio frequency switch, 2 combiners, 1 wave trap, 1 amplitude limiter, 1 circulator and a plurality of radio frequency connecting cables;
the 8 input/output ports include ANT1, ANT2, RF1, RF2, RF3, RF4, RF5, and RF 6; the ANT1 is configured to be used for connecting a base station to be tested; an ANT2 configured to be used for connecting a terminal to be tested; RF1 configured for connection to a standard base station; RF2 configured for connection to standard terminals; an RF3 configured for connecting to a source of interfering signals; an RF4 configured for connecting to a source of interfering signals; an RF5 configured to be used to connect a signal source transmitting IOT-G230 MHz standard signals; an RF6 configured for connection to an analyzer capable of analyzing and demodulating IOT-G230 MHz standard signals; all ports are connected through radio frequency connecting cables;
5 power dividers configured to perform power division of the signal;
the 5 attenuators with fixed attenuation amount comprise 23 dB fixed attenuators, 16 dB fixed attenuator, 1 fixed attenuator with 30dBm and 1 attenuator with 60 dBm;
2 combiners configured to combine the signals;
1 wave trap configured to be used as a band elimination filter, reject useful signals and test out-of-band spurious signals;
1 limiter configured to limit an amplitude range of an input signal;
1 circulator configured for signal looping along a particular direction;
the RF1 is connected with a fifth one-to-two radio frequency switch (17) through a line by a fixed attenuator (3) of 30dBm, and the fifth one-to-two radio frequency switch (17) is respectively connected with a fourth power divider (16) and a fifth power divider (22) through lines;
the first power divider (1) is respectively connected with the RF2, the first 3dB fixed attenuator (2) and the seventh one-to-two radio frequency switch (23) through lines; the first 3dB fixed attenuator (2) is connected with a third one-to-two radio frequency switch (7) through a line, the third one-to-two radio frequency switch (7) is connected with a second power divider (9) and a third power divider (10) through a line, the second power divider (9) is connected with a first one-to-three radio frequency switch (11) and a fourth one-to-two radio frequency switch (15) through a line, the third power divider (10) is connected with the first one-to-three radio frequency switch (11) and a one-to-four radio frequency switch (24) through a line, the first one-to-three radio frequency switch (11) is connected with a first one-to-two radio frequency switch (5) through a line, the first one-to-two radio frequency switch (5) is connected with a second 3dB fixed attenuator (4) and a 60dBm attenuator (8) through a line, and the second 3dB fixed attenuator (4) and the 60dBm attenuator (8) are connected with an ANT1 through a second one-to-two radio frequency switch (6);
the RF3 is connected with a first combiner (12) through a line, the first combiner (12) is respectively connected with a second one-to-three radio frequency switch (13) and a sixth one-to-two radio frequency switch (19) through lines, the sixth one-to-two radio frequency switch (19) is connected with a second combiner (21) through a line, and the second one-to-three radio frequency switch (13) is connected with a fourth one-to-two radio frequency switch (15) through a circulator (14); the fourth one-to-two radio frequency switch (15) is connected to a fourth power divider (16) through a line, the fourth power divider (16) is respectively connected to a fifth one-to-two radio frequency switch (17) and a third one-to-three radio frequency switch (20) through lines, the third one-to-three radio frequency switch (20) is respectively connected to a 6dB fixed attenuator (18), a fifth power divider (22) and a fourth one-to-three radio frequency switch (25) through lines, the 6dB fixed attenuator (18) is connected to an ANT2 through a line, the fifth power divider (22) is connected to a one-to-four radio frequency switch (24) through a line, the one-to-four radio frequency switch (24) is respectively connected to a second combiner (21) and a seventh one-to-two radio frequency switch (23) through a line, the second combiner (21) is connected to an RF4 through a line, the seventh one-to-two radio frequency switch (23) is connected to an RF5 through a line, and the fourth one-to the third radio frequency switch (25) is connected to a sixth one-to three radio frequency switch (29) through a line, the wave trap (27), the amplitude limiter (28) and the conducting wire form a parallel circuit and are connected to two ends of a fifth three-in-one radio frequency switch (26) and a sixth three-in-one radio frequency switch (29), and the fifth three-in-one radio frequency switch (26) is connected to the RF6 through a circuit.
2. The automatic switching device for the IOT-G230 MHz radio frequency conformance test system of claim 1, wherein: the 7 one-to-two radio frequency switches are programmable one-to-two radio frequency switches.
3. The automatic switching device for the IOT-G230 MHz radio frequency conformance test system of claim 1, wherein: the 6 one-to-three radio frequency switches are programmable one-to-three radio frequency switches.
4. The automatic switching device for the IOT-G230 MHz radio frequency conformance test system of claim 1, wherein: the 1 one-to-four radio frequency switch is a programmable one-to-four radio frequency switch.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911124216.8A CN110995366B (en) | 2019-11-18 | 2019-11-18 | Automatic switching device for IOT-G230 MHz radio frequency consistency test system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911124216.8A CN110995366B (en) | 2019-11-18 | 2019-11-18 | Automatic switching device for IOT-G230 MHz radio frequency consistency test system |
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| CN110995366A CN110995366A (en) | 2020-04-10 |
| CN110995366B true CN110995366B (en) | 2021-09-03 |
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| CN115882966A (en) * | 2022-12-01 | 2023-03-31 | 广电计量检测(深圳)有限公司 | 5G mobile test terminal switch filtering unit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104618034A (en) * | 2014-09-05 | 2015-05-13 | 深圳电信研究院 | Automatic test system, device and method for mobile terminal radio frequency consistency |
| CN105703849A (en) * | 2016-01-25 | 2016-06-22 | 北京星河亮点技术股份有限公司 | Radio frequency switching box and system for testing radio frequency consistency of terminals |
| CN108964791A (en) * | 2018-05-30 | 2018-12-07 | 中国电力科学研究院有限公司 | A kind of 1800M RF consistency automatic test device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3043513B1 (en) * | 2015-11-10 | 2017-12-22 | Thales Sa | METHOD OF CHARACTERIZING THE PERFORMANCE OF A PAYLOAD OF A SATELLITE IN ORBIT AND ASSOCIATED IOT TEST SYSTEM |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104618034A (en) * | 2014-09-05 | 2015-05-13 | 深圳电信研究院 | Automatic test system, device and method for mobile terminal radio frequency consistency |
| CN105703849A (en) * | 2016-01-25 | 2016-06-22 | 北京星河亮点技术股份有限公司 | Radio frequency switching box and system for testing radio frequency consistency of terminals |
| CN108964791A (en) * | 2018-05-30 | 2018-12-07 | 中国电力科学研究院有限公司 | A kind of 1800M RF consistency automatic test device and method |
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