CN114696923A - Microwave attenuation measuring instrument - Google Patents

Abstract

The invention provides a microwave attenuation measuring instrument, comprising a transmitting component, a receiving component, a control module and a display control module; the transmitting component, the receiving component and the display control module are all connected with the control module; the transmitting component is used for generating The target frequency signal is sent to the DUT. The receiving component is used to receive and process the attenuation signal returned by the DUT. The processed attenuation signal is sent to the control module for calculation and output measurement results. The display and control module uses It is used to display the measurement results; the device solves the problems of the existing attenuation measurement equipment, such as large volume, large error caused by relying on manual labor, and time-consuming and labor-intensive problems.

Description

A microwave attenuation measuring instrument

technical field

The invention relates to the technical field of testing, in particular to a microwave attenuation measuring instrument.

Background technique

In daily operation, the calibration and calibration of RF cables, attenuators, isolators, circulators and other devices are inseparable from microwave attenuation measurement. However, in daily work, when calibrating these microwave devices, the device is usually connected to the output end of the signal source, and the signal source is used to provide excitation, and the other end is connected to the input end of the spectrum analyzer, so as to read the attenuation value of the device. Completing this operation not only requires a lot of equipment and is bulky, and is difficult to handle; it also requires high requirements for personnel to operate instruments, has many operation steps, large errors, and is time-consuming and labor-intensive.

SUMMARY OF THE INVENTION

The invention provides a microwave attenuation measuring instrument to solve the problems of large volume, large error caused by relying on manual labor, and time-consuming and labor-intensive problems of the existing attenuation measuring equipment.

A microwave attenuation measuring instrument includes a transmitting component, a receiving component, a control module and a display and control module;

The transmitting assembly, the receiving assembly and the display control module are all connected with the control module;

The transmitting component is used to generate the target frequency signal and send it to the DUT, the receiving component is used to receive and process the attenuation signal returned by the DUT, and the processed attenuation signal is sent to the control module for calculation and output measurement results , the display and control module is used to display the measurement result.

Further, the transmitting assembly includes a broadband source module, a frequency multiplier module and a power control module;

The broadband source module is connected to the frequency multiplication module, the frequency multiplication module is connected to the power control module, and the broadband source module, the frequency multiplication module and the power control module are all connected to the control module;

The broadband source module is used to generate a local oscillator signal, and the frequency multiplication module is used to perform frequency multiplication processing on the local oscillator signal, and send it to the power control module, and the power control module is used for frequency multiplication. The signal is power adjusted to generate the target frequency signal.

Further, the microwave attenuation measuring instrument further includes a transmission interface module, and the transmission interface module is connected with the power control module and is used for connecting an adapter cable for testing.

Further, the frequency of the target frequency signal is 6GHZ-40GHZ.

Further, the receiving assembly includes a down-conversion module and an AD module, and both the down-conversion module and the AD module are connected to the control module;

The down-conversion module is used to receive the attenuation signal returned by the DUT, perform down-conversion processing, and send it to the AD module for analog-to-digital conversion, and generate a digital signal to send to the control module.

Further, the microwave attenuation measuring instrument further includes a receiving interface module, and the receiving interface module is connected with the down-conversion module, and is used for connecting a test adapter cable.

The microwave attenuation measuring instrument provided by the invention solves the problems of preset frequency signal generation, amplitude detection and measurement indication, has the ability to measure radio frequency attenuation covering various frequency bands, has high detection accuracy, small error, and has the advantages of miniaturization, portability and light weight. Features, strong reliability, use the method of calibration before use to solve the stability requirements of measurement indicators, simplify operation steps, and user-friendly interface.

Description of drawings

FIG. 1 is a schematic structural diagram of an embodiment of the microwave attenuation measuring instrument provided by the present invention.

FIG. 2 is a schematic structural diagram of another embodiment of the microwave attenuation measuring instrument provided by the present invention.

Detailed ways

In order to better understand the above technical solutions, the above technical solutions will be described in detail below with reference to the accompanying drawings and specific embodiments.

Referring to FIG. 1 , in some embodiments, a microwave attenuation measuring instrument is provided, including a transmitting assembly 1 , a receiving assembly 2 , a control module 3 and a display control module 4 ;

The transmitting component 1, the receiving component 2 and the display control module 4 are all connected with the control module 3;

The transmitting component 1 is used to generate the target frequency signal and send it to the DUT, and the receiving component 2 is used to receive the attenuation signal returned by the DUT and process it. The processed attenuation signal is sent to the control module 3 for calculation and output measurement results. The display and control module 4 is used to display the measurement results.

Referring to FIG. 2 , the transmitting assembly 1 includes a broadband source module 11, a frequency multiplying module 12 and a power control module 13;

The broadband source module 11 is connected to the frequency doubling module 12, the frequency doubling module 12 is connected to the power control module 13, and the broadband source module 11, the frequency doubling module 12 and the power control module 13 are all connected to the control module 3;

The broadband source module 11 is used to generate the local oscillator signal, the frequency multiplication module 12 is used to perform frequency multiplication processing on the local oscillator signal, and send it to the power control module 13, and the power control module 13 is used to adjust the power of the frequency multiplied signal, Generate the target frequency signal.

The microwave attenuation measuring instrument further includes a transmission interface module 5, which is connected to the power control module 13 and is used for connecting an adapter cable for testing.

The frequency of the target frequency signal is 6GHZ-40GHZ.

The receiving component 2 includes a down-conversion module 21 and an AD module 22, and the down-conversion module 21 and the AD module 22 are both connected to the control module 13;

The down-conversion module 21 is used to receive the attenuated signal returned by the DUT, perform down-conversion processing, and send it to the AD module 22 for analog-to-digital conversion to generate a digital signal and send it to the control module 3 .

Further, the microwave attenuation measuring instrument further includes a receiving interface module 6, and the receiving interface module 6 is connected to the down-conversion module 21, and is used for connecting an adapter cable for testing.

The display control module 4 is mainly composed of a single-chip microcomputer, an FPGA and its peripheral circuits.

The working principle of the microwave attenuation measuring instrument provided by the above embodiment is as follows: the signal input interface of the DUT 10 is connected to the transmitting interface module through an adapter cable, the signal output interface of the DUT is connected to the receiving interface module 6 through an adapter cable, and the user Input the test frequency point or other parameters through the display control module 4, the broadband source module 11 generates a local oscillator signal, which is processed by the frequency multiplier module to generate a signal with a frequency above Ku, and the target frequency signal is generated after power adjustment by the power control module 13, which is processed by the frequency multiplier module. The test piece 10 receives the target frequency signal, and after the target frequency signal is attenuated by the test piece 10, it is sent to the down-conversion module 21 through the receiving interface module 6, and is down-converted into an intermediate frequency signal, which is generated by analog-to-digital conversion through the AD module 22. The digital signal is sent to the control module 3 , processed by the control module 3 to form measurement data, and then output by the display and control module 4 .

The transmitting component can output continuous wave microwave signals from 6GHz to 40GHz, and the power range is -10dBm to 10dBm; the receiving component down-converts the signal passing through the DUT into a narrow-band intermediate frequency signal, and can extract the amplitude information of the received signal through AD and control circuit. , and then the attenuation of the DUT can be calculated.

The microwave attenuation measuring instrument provided by the above embodiment has the ability to measure radio frequency attenuation covering various frequency bands, has high detection accuracy, small error, is miniaturized, portable, light in weight, and has strong reliability. The method of calibration before use is adopted. Solve the stability requirements of measurement indicators, simplify the operation steps, and have a friendly user interface.

Although preferred embodiments of the present invention have been described, additional changes and modifications to these embodiments may occur to those skilled in the art once the basic inventive concepts are known. Therefore, the appended claims are intended to be construed to include the preferred embodiment and all changes and modifications that fall within the scope of the present invention. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. Thus, provided that these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims (6)

1. A microwave attenuation measuring instrument is characterized by comprising a transmitting assembly, a receiving assembly, a control module and a display control module;

the transmitting assembly, the receiving assembly and the display control module are all connected with the control module;

the transmitting assembly is used for generating a target frequency signal and sending the target frequency signal to a tested piece, the receiving assembly is used for receiving and processing an attenuation signal returned by the tested piece, the processed attenuation signal is sent to the control module to be calculated and output a measuring result, and the display control module is used for displaying the measuring result.

2. The microwave attenuation gauge of claim 1, wherein the transmitting assembly comprises a broadband source module, a frequency doubling module, and a power control module;

the broadband source module is connected with the frequency doubling module, the frequency doubling module is connected with the power control module, and the broadband source module, the frequency doubling module and the power control module are all connected with the control module;

the broadband source module is used for generating local oscillator signals, the frequency doubling module is used for carrying out frequency doubling processing on the local oscillator signals and sending the frequency doubling processed local oscillator signals to the power control module, and the power control module is used for carrying out power adjustment on the frequency doubled signals and generating target frequency signals.

3. The microwave attenuation gauge of claim 2, further comprising a transmission interface module connected to the power control module for connecting a test adapter cable.

4. A microwave attenuation gauge according to claim 1 or 3, wherein the frequency of the target frequency signal is from 6GHZ to 40 GHZ.

5. The microwave attenuation gauge according to claim 1, wherein the receiving assembly comprises a down-conversion module and an AD module, both connected to the control module;

the down-conversion module is used for receiving an attenuation signal returned by the tested piece, performing down-conversion processing, sending the attenuation signal to the AD module for analog-to-digital conversion, generating a digital signal and sending the digital signal to the control module.

6. The microwave attenuation gauge of claim 5, further comprising a receiving interface module connected to the down-conversion module for connecting a test adapter cable.

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