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Measuring method and device for obtaining distribution of microwave magnetic fields in microwave cavity

A measurement method and a technology for magnetic field distribution, applied in the field of microwave magnetic field testing in microwave cavity, can solve problems such as difficult microwave magnetic field distribution

Active Publication Date: 2019-09-17
INNOVATION ACAD FOR PRECISION MEASUREMENT SCI & TECH CAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the distribution of the microwave magnetic field in the microwave cavity can generally be obtained through simulation calculations, but for non-standard cavities, it is difficult to obtain the distribution of the microwave magnetic field through calculation, so the applicant needs to design a device for testing the distribution of the microwave magnetic field in the microwave cavity. and improve the microwave field by design

Method used

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  • Measuring method and device for obtaining distribution of microwave magnetic fields in microwave cavity
  • Measuring method and device for obtaining distribution of microwave magnetic fields in microwave cavity

Examples

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Embodiment 1

[0028] A measurement method for obtaining microwave magnetic field distribution in a microwave cavity, the steps of which are:

[0029] Step 1: The microwave source feeds constant power into the microwave cavity to be tested through the coupling ring to form a microwave magnetic field;

[0030] Step 2: Move the coaxial cable so that the detection ring connected to one end of the coaxial cable covers the entire microwave cavity to be tested in the moving steps of the X, Y, and Z directions in the microwave cavity to be tested. Internally measure the distribution of induced electromotive force components in X, Y, and Z directions, and the detection ring is perpendicular to the direction of the microwave magnetic field;

[0031] Step 3: The spectrum analyzer reads the induced electromotive force component measured by the detection ring through the semi-rigid coaxial cable, and the spectrum analyzer outputs the power component of the microwave signal;

[0032] Step 4: Correspond ...

Embodiment 2

[0035] Such as figure 1 , a measuring device for obtaining the microwave magnetic field distribution of a microwave cavity, which is composed of a detection ring 1, a semi-rigid coaxial cable 2, a microwave source 3, a spectrum analyzer 4, a three-dimensional translation platform 5, and a microwave cavity 6 to be measured. The connection relationship of this device is: the semi-rigid coaxial cable 2 is electrically connected with the detection ring 1 and the spectrum analyzer 4 respectively. The constant power is fed into the microwave cavity 6 to be tested through the coupling ring 7 wound on the outer wall of the microwave cavity, and the microwave signal power P detected by the detection ring 1 through the semi-rigid coaxial cable 2 is read by the spectrum analyzer 4, and the microwave cavity 6 to be tested is Fixed by screws, by moving the three-dimensional translation stage 5 in the (X, Y, Z) direction, which is equivalent to moving the detection ring 1 in the (X, Y, Z) d...

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Abstract

The invention discloses a device for testing distribution of microwave fields in a microwave cavity. The device is composed of a microwave source, a detection ring, a frequency spectrometer and a three-dimensional translation table. The detection ring is made of one end of semi-rigid coaxial cable SFT-50-1; a core wire of the semi-rigid coaxial cable is stripped, and is welded to an outer copper skin of the cable to form the circular detection ring; the other end of the semi-rigid coaxial cable is made into an SMA adapter; and the semi-rigid coaxial cable is connected with a soft coaxial cable through the SMA adapter and then is connected with the spectrometer. The semi-rigid coaxial cable is fixed on the three-dimensional translation table. The detection ring is moved through the three-dimensional translation table, and then the intensities of the microwave fields in all directions (X, Y and Z) in the microwave cavity detected in the detection ring are read through the spectrometer, thereby obtaining the distribution of the microwave fields in the microwave cavity. The device has the advantages of being simple in structure and convenient to use; and the distribution of the field intensities of the microwave field in all the directions can be easily obtained.

Description

technical field [0001] The present invention relates to the field of testing microwave magnetic fields in microwave cavities, more specifically to a method for measuring the distribution of microwave magnetic fields in microwave cavities, and also to a device for measuring the distribution of microwave magnetic fields in microwave cavities, which is suitable for measuring microwave Microwave magnetic field distribution in all directions in the cavity. Background technique [0002] Rubidium atomic clocks are widely used in navigation, communication, electric power, transportation and other fields due to their small size, light weight, low power consumption, and high frequency stability. The core of the rubidium atomic clock is the physical and physical system. It is an atomic frequency discriminator, and the signal-to-noise ratio of its frequency discrimination signal directly determines the most important technical index of the rubidium atomic clock—frequency stability. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/032G01R33/02
CPCG01R33/02G01R33/0322
Inventor 梅刚华王芳赵峰明刚
Owner INNOVATION ACAD FOR PRECISION MEASUREMENT SCI & TECH CAS
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