CN111130497A - Filtering device and microwave measurement test system - Google Patents
Filtering device and microwave measurement test system Download PDFInfo
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- CN111130497A CN111130497A CN201911353851.3A CN201911353851A CN111130497A CN 111130497 A CN111130497 A CN 111130497A CN 201911353851 A CN201911353851 A CN 201911353851A CN 111130497 A CN111130497 A CN 111130497A
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- 238000001914 filtration Methods 0.000 title claims abstract description 46
- 238000012360 testing method Methods 0.000 title claims abstract description 17
- 238000005259 measurement Methods 0.000 title abstract description 12
- 230000001629 suppression Effects 0.000 claims description 37
- 238000004891 communication Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 3
- 238000000691 measurement method Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 238000001228 spectrum Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/46—Filters
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/30—Structural combination of electric measuring instruments with basic electronic circuits, e.g. with amplifier
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
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Abstract
The invention discloses a filtering device, comprising: the device comprises a control unit, a first program control switch, a second program control switch and a filter bank; the first program control switch and the second program control switch are both single-pole multi-throw switches, one end of the first program control switch is used for receiving input of microwave signals, and the other end of the first program control switch is connected with the input end of each filter in the filter bank; one end of the second program control switch is respectively connected with the output end of each filter in the filter bank, and the other end of the second program control switch is used for outputting filtered signals; the control unit is used for receiving an upper computer instruction, controlling the on-off of the first program control switch and the second program control switch, and accessing the filter required to be gated to the microwave signal path. According to the microwave power measurement method and device, manual operation is not needed, operation steps are simplified, and automation of the power measurement process in the microwave is achieved. In addition, the application also provides a microwave metering test system with the technical effect.
Description
Technical Field
The invention relates to the technical field of filtering, in particular to a filtering device and a microwave metering test system.
Background
In the measurement and test of the microwave power meter, the harmonic suppression of a high-power signal in the output after passing through a microwave power amplifier is generally not more than 20dBc, which brings about 1% of error to the measurement of the microwave power. In order to improve the accuracy of the medium and high power measurement, the signal is usually filtered at the measurement front end to remove components such as harmonic waves and improve the purity of the frequency spectrum.
However, the frequency range of 10MHz to 3.5GHz spans 350 octaves, and a single filter cannot meet the filtering requirement of such wide frequency. In the prior art, the adopted technical means is usually to manually access a corresponding filter according to the test frequency to achieve the filtering effect, so that the operation is complicated, and the automation of power measurement cannot be realized.
Disclosure of Invention
The invention aims to provide a filtering device and a microwave metering test system, which are used for simplifying the filtering operation steps and realizing the automation of microwave power measurement.
To solve the above technical problem, the present invention provides a filtering apparatus, including: the device comprises a control unit, a first program control switch, a second program control switch and a filter bank;
the first program control switch and the second program control switch are both single-pole multi-throw switches, one end of the first program control switch is used for receiving input of microwave signals, and the other end of the first program control switch is connected with the input end of each filter in the filter bank; one end of the second program control switch is respectively connected with the output end of each filter in the filter bank, and the other end of the second program control switch is used for outputting filtered signals; the control unit is used for receiving an upper computer instruction, controlling the on-off of the first program control switch and the second program control switch, and accessing the filter required to be gated to the microwave signal path.
Optionally, the filter bank includes a plurality of LC low-pass filters, and the filtering frequencies of the filters are combined to cover a range from 10MHz to 3.5 GHz.
Optionally, the filter bank includes at least 12 filters, and the first programmable switch and the second programmable switch are both single-pole 12-throw switches.
Optionally, the operating parameters and performance parameters of the filter are:
the frequency band of the first filter is 10M-16 MHz, the cut-off frequency is 16MHz, and the harmonic suppression is more than or equal to 40 dBc; the frequency band of the second filter is 16M-25 MHz, the cut-off frequency is 25MHz, and the harmonic suppression is more than or equal to 40 dBc; the frequency band of the third filter is 25M-40 MHz, the cut-off frequency is 40MHz, and the harmonic suppression is more than or equal to 40 dBc; the frequency band of the fourth filter is 40M-60 MHz, the cut-off frequency is 60MHz, and the harmonic suppression is more than or equal to 40 dBc; the frequency band of the fifth filter is 60M-100 MHz, the cut-off frequency is 100MHz, and the harmonic suppression is more than or equal to 40 dBc; the frequency band of the sixth filter is 100M-165 MHz, the cut-off frequency is 165MHz, and the harmonic suppression is more than or equal to 40 dBc; the frequency band of the seventh filter is 165M-275 MHz, the cut-off frequency is 275MHz, and the harmonic suppression is more than or equal to 40 dBc; the frequency band of the eighth filter is 275M-465 MHz, the cut-off frequency is 465MHz, and the harmonic suppression is more than or equal to 40 dBc; the frequency band of the ninth filter is 465M-775 MHz, the cut-off frequency is 775MHz, and the harmonic suppression is more than or equal to 40 dBc; the frequency band of the tenth filter is 775M-1290 MHz, the cut-off frequency is 1290MHz, and the harmonic suppression is more than or equal to 40 dBc; the frequency band of the eleventh filter is 1290M-2150 MHz, the cut-off frequency is 2150MHz, and the harmonic suppression is more than or equal to 40 dBc; the frequency band of the twelfth filter is 2150M-3500 MHz, the cut-off frequency is 3500MHz, and the harmonic suppression is more than or equal to 40 dBc.
Optionally, the control unit is an FPGA or a single chip microcomputer.
Optionally, the control unit is in communication connection with the upper computer through an RS232 serial port.
Optionally, the control unit and the RS232 serial port perform data communication by using a command format of a 16-ary encoding mode.
Optionally, the control unit is in communication connection with the upper computer through a USB serial port or a 485 serial port.
In addition, the application also provides a microwave metering test system, which comprises any one of the filtering devices, and is used for filtering microwave signals.
According to the filtering device provided by the invention, the control unit receives the instruction sent by the upper computer, and controls the on-off of the first program control switch and the second program control switch so as to access the filter required to be gated to the microwave signal path. According to the filtering frequency combination of each filter in the filter bank, the signal filtering of wider frequency can be realized, the frequency spectrum purity of the testing frequency signal is improved, manual operation is not needed, the operation steps are simplified, and the automation of the power measuring process in the microwave is realized. In addition, the application also provides a microwave metering test system with the technical effect.
Drawings
In order to more clearly illustrate the embodiments or technical solutions of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of one embodiment of a filtering apparatus provided herein;
FIG. 2 is a schematic diagram of another embodiment of a filtering apparatus provided herein;
fig. 3 is a schematic diagram of an embodiment of an FPGA in the filter provided in the present application.
Detailed Description
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a schematic diagram of an embodiment of a filtering apparatus provided in the present application is shown in fig. 1, and the apparatus specifically includes: the device comprises a control unit 1, a first program control switch 2, a second program control switch 3 and a filter bank 4;
the first program-controlled switch 2 and the second program-controlled switch 3 are both single-pole multi-throw switches, one end of the first program-controlled switch 2 is used for receiving input of microwave signals, and the other end of the first program-controlled switch is respectively connected with input ends of all filters in the filter bank 4; one end of the second program-controlled switch 3 is respectively connected with the output end of each filter in the filter bank 4, and the other end is used for outputting the filtered signals; the control unit 1 is used for receiving an instruction of an upper computer, controlling the on-off of the first program-controlled switch 2 and the second program-controlled switch 3, and accessing a filter required to be gated to a microwave signal path.
The filter bank comprises a plurality of LC low-pass filters, and the filtering frequency of each filter covers the range of 10 MHz-3.5 GHz after being combined. In particular, the filter bank may comprise at least 12 filters, by which the filtering frequency combination may cover the range of 10MHz to 3.5 GHz.
According to the filtering device provided by the invention, the control unit receives the instruction sent by the upper computer, and controls the on-off of the first program control switch and the second program control switch so as to access the filter required to be gated to the microwave signal path. According to the filtering frequency combination of each filter in the filter bank, the signal filtering of wider frequency can be realized, the frequency spectrum purity of the testing frequency signal is improved, manual operation is not needed, the operation steps are simplified, and the automation of the power measuring process in the microwave is realized.
As a preferred embodiment, in the filtering apparatus provided in the present application, the filter bank may specifically include 12 filters, and the first programmable switch and the second programmable switch are both single-pole 12-throw switches.
The working parameters and performance parameters of the filter are as follows:
the frequency band of the first filter is 10M-16 MHz, the cut-off frequency is 16MHz, and the harmonic suppression is more than or equal to 40 dBc; the frequency band of the second filter is 16M-25 MHz, the cut-off frequency is 25MHz, and the harmonic suppression is more than or equal to 40 dBc; the frequency band of the third filter is 25M-40 MHz, the cut-off frequency is 40MHz, and the harmonic suppression is more than or equal to 40 dBc; the frequency band of the fourth filter is 40M-60 MHz, the cut-off frequency is 60MHz, and the harmonic suppression is more than or equal to 40 dBc; the frequency band of the fifth filter is 60M-100 MHz, the cut-off frequency is 100MHz, and the harmonic suppression is more than or equal to 40 dBc; the frequency band of the sixth filter is 100M-165 MHz, the cut-off frequency is 165MHz, and the harmonic suppression is more than or equal to 40 dBc; the frequency band of the seventh filter is 165M-275 MHz, the cut-off frequency is 275MHz, and the harmonic suppression is more than or equal to 40 dBc; the frequency band of the eighth filter is 275M-465 MHz, the cut-off frequency is 465MHz, and the harmonic suppression is more than or equal to 40 dBc; the frequency band of the ninth filter is 465M-775 MHz, the cut-off frequency is 775MHz, and the harmonic suppression is more than or equal to 40 dBc; the frequency band of the tenth filter is 775M-1290 MHz, the cut-off frequency is 1290MHz, and the harmonic suppression is more than or equal to 40 dBc; the frequency band of the eleventh filter is 1290M-2150 MHz, the cut-off frequency is 2150MHz, and the harmonic suppression is more than or equal to 40 dBc; the frequency band of the twelfth filter is 2150M-3500 MHz, the cut-off frequency is 3500MHz, and the harmonic suppression is more than or equal to 40 dBc.
As a specific implementation manner, in the filtering device provided by the present application, the control unit may be specifically an FPGA or a single chip. Of course, other elements are also possible, and are not limited herein.
Taking an example that the control unit is implemented by using an FPGA, a schematic diagram of another specific embodiment of the filtering apparatus provided by the present application is shown in fig. 2, and the filtering apparatus specifically includes 2 programmable single-pole multi-throw switches, a filter bank, a power supply unit, and a control unit. The single-pole multi-throw switch adopts a single-pole 12-throw coaxial high-power microwave switch, a filter bank consists of 12 high-power coaxial filters, and the filtering frequencies of the filters are combined to cover the range of 10MHz to 3.5 GHz.
Further, in the filtering device provided by the application, the control unit may be in communication connection with the upper computer specifically through an RS232 serial port. In addition, the control unit can also pass through USB serial ports or 485 serial ports with host computer communication connection, this all does not influence the realization of this application.
Fig. 3 is a schematic diagram of a specific embodiment of an FPGA in the filter provided by the present application. The switching channel of the two single-pole multi-throw high-power switches is driven by the communication of the RS232 serial port and an external computer.
And the control unit and the RS232 serial port are in data communication by adopting a command format of a 16-system coding mode. The command format of serial communication adopts a 16-system coding mode, for example, 1 channel is closed, only the RS232 is needed to send the '1' code, the 'C' code is sent, and 12 channels are closed.
According to the frequency range of 10 MHz-3.5 GHz, the filter bank is composed of 12 medium-power LC low-pass filters, and the working frequency band and the main performance specification of each filter are shown in Table 1.
TABLE 1
In this embodiment, when the filtering apparatus works, the control unit receives control command information sent by an external computer through the RS232 serial port, and the FPGA control unit drives the two 1-throw 12-high-power coaxial microwave switches to act respectively according to the received control information, and accesses a filter required to be gated to the microwave signal path, so as to implement power signal filtering and improve the spectral purity of the test frequency signal.
In addition, the application also provides a microwave metering test system which comprises any one of the filtering devices and is used for filtering microwave signals.
The microwave medium power automatic measurement and test device is applied to the field of automatic measurement and test of power in microwave of 100W and below, the filtering device is controlled by a microcomputer program to filter out harmonic waves, clutter and other components in medium power signals with the frequency of 10 MHz-3.5 GHz, the frequency spectrum purity of the power signals is improved, and the high-accuracy automatic measurement requirement of the medium power signals with the frequency of 10 MHz-3.5 GHz is met.
The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The filter device and the microwave metering test system provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (9)
1. A filtering apparatus, comprising: the device comprises a control unit, a first program control switch, a second program control switch and a filter bank;
the first program control switch and the second program control switch are both single-pole multi-throw switches, one end of the first program control switch is used for receiving input of microwave signals, and the other end of the first program control switch is connected with the input end of each filter in the filter bank; one end of the second program control switch is respectively connected with the output end of each filter in the filter bank, and the other end of the second program control switch is used for outputting filtered signals; the control unit is used for receiving an upper computer instruction, controlling the on-off of the first program control switch and the second program control switch, and accessing the filter required to be gated to the microwave signal path.
2. The filtering apparatus as claimed in claim 1, wherein said filter bank comprises a plurality of LC low-pass filters, and the filtering frequencies of the respective filters are combined to cover a range of 10MHz to 3.5 GHz.
3. The filtering apparatus as claimed in claim 1 or 2, wherein the filter bank comprises at least 12 filters, and the first programmable switch and the second programmable switch are single-pole 12-throw switches.
4. The filtering apparatus as claimed in claim 3, wherein the operating parameters and performance parameters of the filter are:
the frequency band of the first filter is 10M-16 MHz, the cut-off frequency is 16MHz, and the harmonic suppression is more than or equal to 40 dBc; the frequency band of the second filter is 16M-25 MHz, the cut-off frequency is 25MHz, and the harmonic suppression is more than or equal to 40 dBc; the frequency band of the third filter is 25M-40 MHz, the cut-off frequency is 40MHz, and the harmonic suppression is more than or equal to 40 dBc; the frequency band of the fourth filter is 40M-60 MHz, the cut-off frequency is 60MHz, and the harmonic suppression is more than or equal to 40 dBc; the frequency band of the fifth filter is 60M-100 MHz, the cut-off frequency is 100MHz, and the harmonic suppression is more than or equal to 40 dBc; the frequency band of the sixth filter is 100M-165 MHz, the cut-off frequency is 165MHz, and the harmonic suppression is more than or equal to 40 dBc; the frequency band of the seventh filter is 165M-275 MHz, the cut-off frequency is 275MHz, and the harmonic suppression is more than or equal to 40 dBc; the frequency band of the eighth filter is 275M-465 MHz, the cut-off frequency is 465MHz, and the harmonic suppression is more than or equal to 40 dBc; the frequency band of the ninth filter is 465M-775 MHz, the cut-off frequency is 775MHz, and the harmonic suppression is more than or equal to 40 dBc; the frequency band of the tenth filter is 775M-1290 MHz, the cut-off frequency is 1290MHz, and the harmonic suppression is more than or equal to 40 dBc; the frequency band of the eleventh filter is 1290M-2150 MHz, the cut-off frequency is 2150MHz, and the harmonic suppression is more than or equal to 40 dBc; the frequency band of the twelfth filter is 2150M-3500 MHz, the cut-off frequency is 3500MHz, and the harmonic suppression is more than or equal to 40 dBc.
5. The filtering device according to claim 4, wherein the control unit is an FPGA or a single chip microcomputer.
6. The filtering device according to claim 5, wherein the control unit is in communication connection with the upper computer through an RS232 serial port.
7. The filtering apparatus as claimed in claim 6, wherein the control unit communicates data with the RS232 serial port in a command format of 16-ary encoding mode.
8. The filtering device according to claim 5, wherein the control unit is in communication connection with the upper computer through a USB serial port or a 485 serial port.
9. A microwave metrology test system comprising a filtering apparatus according to any one of claims 1 to 8 for filtering microwave signals.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911353851.3A CN111130497B (en) | 2019-12-25 | 2019-12-25 | Filtering device and microwave metering test system |
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| CN201911353851.3A CN111130497B (en) | 2019-12-25 | 2019-12-25 | Filtering device and microwave metering test system |
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| CN111130497A true CN111130497A (en) | 2020-05-08 |
| CN111130497B CN111130497B (en) | 2024-08-13 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111756356A (en) * | 2020-07-08 | 2020-10-09 | 上海威固信息技术股份有限公司 | Program-controlled microstrip filter based on UART protocol and sine wave generation method |
| CN111865253A (en) * | 2020-07-08 | 2020-10-30 | 上海威固信息技术股份有限公司 | Program-controlled LC filter based on I2C protocol and sine wave generation method |
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| US20130241666A1 (en) * | 2011-10-13 | 2013-09-19 | Rf Micro Devices, Inc. | Band switch with switchable notch for receive carrier aggregation |
| CN207588819U (en) * | 2018-01-31 | 2018-07-06 | 成都泰格微电子研究所有限责任公司 | A kind of L frequency ranges multi-channel switch wave filter group |
| CN108377155A (en) * | 2018-02-02 | 2018-08-07 | 广州慧睿思通信息科技有限公司 | A kind of multi-standard, multiband, miniaturization communication receiver apparatus |
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2019
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20130241666A1 (en) * | 2011-10-13 | 2013-09-19 | Rf Micro Devices, Inc. | Band switch with switchable notch for receive carrier aggregation |
| CN207588819U (en) * | 2018-01-31 | 2018-07-06 | 成都泰格微电子研究所有限责任公司 | A kind of L frequency ranges multi-channel switch wave filter group |
| CN108377155A (en) * | 2018-02-02 | 2018-08-07 | 广州慧睿思通信息科技有限公司 | A kind of multi-standard, multiband, miniaturization communication receiver apparatus |
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| CN111756356A (en) * | 2020-07-08 | 2020-10-09 | 上海威固信息技术股份有限公司 | Program-controlled microstrip filter based on UART protocol and sine wave generation method |
| CN111865253A (en) * | 2020-07-08 | 2020-10-30 | 上海威固信息技术股份有限公司 | Program-controlled LC filter based on I2C protocol and sine wave generation method |
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| CN111130497B (en) | 2024-08-13 |
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