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High-precision 3 mm-waveband single-side-band noise coefficient spread spectrum measurement device and method

A technology of noise figure and measurement device, which is used in radio wave measurement systems, instruments, receiver monitoring, etc., to achieve the effect of high purchase and maintenance costs

Active Publication Date: 2015-03-25
CHINA ELECTRONIS TECH INSTR CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0017] In order to overcome the shortcomings of the existing 3mm noise figure test scheme, the purpose of the present invention is to introduce a 3mm band noise figure single sideband high-precision spread spectrum measurement device and method, and a microwave noise figure analysis host to form a set of test systems to achieve 75 ~110GHz SSB, high-precision noise figure measurement, to meet the increasing test requirements of 3mm band noise figure

Method used

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  • High-precision 3 mm-waveband single-side-band noise coefficient spread spectrum measurement device and method
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  • High-precision 3 mm-waveband single-side-band noise coefficient spread spectrum measurement device and method

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Embodiment 1

[0045] The 3mm band SSB high-precision noise factor SSB high-precision spread spectrum device provided in this embodiment adopts the fundamental wave mixing scheme of segmental frequency conversion and high-frequency output, mainly based on fixed local oscillator and intermediate frequency scanning, fixed intermediate frequency, local The frequency mixing mode is supplemented by vibrating scanning and the combination of upper and lower sidebands, and the frequency coverage range of 75 ~ 110GHz is realized by a spread spectrum device.

[0046] Such as image 3 As shown, it is a structural diagram of a 3mm band noise figure SSB high-precision spread spectrum measuring device in this embodiment, including:

[0047] Down converter module 301, microwave local oscillator synthesis module 302, control interface module 303 and power supply module 304;

[0048] The down-converter module 301 is used to complete the input matching, subsection filtering and down-conversion of the 3mm sig...

Embodiment 2

[0062] Such as Figure 4 As shown, it is a flowchart of a 3mm band noise figure SSB high-precision spread spectrum measurement method of the second embodiment, including:

[0063] Step 401, under the excitation of the 3mm noise source, the device under test outputs the radio frequency signal to the radio frequency input port of the 3mm spread spectrum device;

[0064] Step 402, the radio frequency signal is input to the 3mm fundamental wave mixer after filtering the image frequency response through the first isolator, the waveguide switch and the bandpass filter for suppressing the image frequency response inside the spread spectrum device;

[0065] Step 403, performing frequency mixing with a corresponding local oscillator signal in the fundamental wave mixer, and outputting an intermediate frequency signal;

[0066] Step 404, the intermediate frequency signal is sent to the microwave noise figure analyzer after intermediate frequency amplification and channel gain adjustmen...

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Abstract

The invention provides a high-precision 3 mm-waveband single-side-band noise coefficient spread spectrum measurement device and method. The device comprises a down converter module, a microwave and local oscillator combining module, a control interface module and a power module. The down converter module is used for achieving input matching, subsection filtering and down converting of 3 mm signals. The microwave and local oscillator combining module comprises a YTO (YIG tuned oscillator) and a drive and control circuit and is used for generating a combined scanning local oscillator signal source. The control interface module is used for achieving information interaction of a microwave noise coefficient analyzer host and a local spread spectrum measurement device through a USB intelligent interface bus. The power module is used for providing various power sources needed by the local spread spectrum measurement device. By the adoption of the device and method, the problems that the system is huge, the measurement accuracy is poor, the measurement repeatability and consistency cannot be guaranteed easily, the purchase and maintenance cost is high and operation is difficult in an existing 3 mm-waveband noise coefficient testing scheme are solved.

Description

technical field [0001] The invention relates to the technical field of noise figure testing, in particular to a 3mm band noise figure single sideband high-precision spread spectrum measuring device and method. Background technique [0002] Noise figure is one of the key parameters that characterizes the ability of the receiver and its components to handle weak signals in the presence of thermal noise. As the spectrum resources occupied by electronic equipment expand to the 3mm band, the high-precision noise figure test equipment for the 3mm band needs are becoming increasingly urgent. [0003] Y-factor method is commonly used in millimeter-wave band noise figure measurement, which is an excellent fusion of solid-state noise source and high-sensitivity receiver. The solid-state noise source outputs a broadband white noise signal as a standard excitation source for measurement, and the high-sensitivity receiver is used for power measurement of weak random noise. Since the so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/40H04B17/20
CPCG01S7/40
Inventor 宋青娥李文军郑利颖梁胜利姜万顺薛龙
Owner CHINA ELECTRONIS TECH INSTR CO LTD
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