Planar transmission line structure for improving ferromagnetic resonance linewidth test precision

A technology of planar transmission lines and ferromagnetic resonance lines, applied in measuring devices, using electromagnetic means, instruments, etc., can solve the problems of increasing signal line width, large dielectric loss, and poor signal isolation, so as to eliminate return loss, The dielectric constant is moderate and the effect of improving the test accuracy
CN113203351APending Publication Date: 2021-08-03UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
UNIV OF ELECTRONICS SCI & TECH OF CHINA
Publication Date
2021-08-03

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Abstract

The invention provides a planar transmission line structure for improving ferromagnetic resonance linewidth test precision, and belongs to the field of microwave millimeter wave band magnetic material parameter test. The planar transmission line structure comprises a first-stage standard characteristic impedance grounding coplanar waveguide, a first-stage non-standard microstrip line, an intermediate-stage non-standard characteristic impedance grounding coplanar waveguide, a second-stage non-standard microstrip line and a second-stage standard characteristic impedance grounding coplanar waveguide which are sequentially connected in series; the characteristic impedance of the first-stage standard characteristic impedance grounding coplanar waveguide, the characteristic impedance of the second-stage standard characteristic impedance grounding coplanar waveguide, and the characteristic impedance of a transmission line composed of the first-stage non-standard microstrip line, the middle-stage non-standard characteristic impedance grounding coplanar waveguide and the second-stage non-standard microstrip line are 50 ohms. The signal line width and the slot spacing of the middle-stage non-standard characteristic impedance grounding coplanar waveguide are process limit values; and the lengths of the first-stage and second-stage non-standard microstrip lines are 1 / 4 of the central frequency wavelength. Through multi-stage transmission line conversion, the grounding coplanar waveguide with the signal line width and the groove spacing being the process limit values is realized, and the test precision is improved.
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Description

technical field

[0001] The invention belongs to the field of microwave and millimeter wave band magnetic material parameter testing, and in particular relates to a planar transmission line structure for improving the testing accuracy of ferromagnetic resonance line width. Background technique

[0002] Under the background of the rapid development of wireless microwave communication, the operating frequency of each part of the core components of the communication system gradually enters the microwave band and the millimeter wave band. requirements, traditional devices are no longer applicable. With the discovery of the giant magnetoresistance effect, magnetic material devices have gradually highlighted their huge application potential due to their small size, high precision, and fast speed, because of their small footprint, high usable frequency, strong anisotropy, and low loss. It has been widely used in microwave communication devices such as circulators and isolators, gre...

Claims

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