Micro-strip line filter sharing substrate with YIG (Yttrium Iron Garnet) thin film material, and regulation method thereof

Abstract

The invention discloses a micro-strip line filter sharing a substrate with YIG (Yttrium Iron Garnet) thin film material, and a regulation method thereof. The micro-strip line filter comprises two piezoelectric layers (1), one YIG layer (2), GGG (Gadolinium Gallium Garnet) substrate material (3) and a metal micro-strip line (4); the micro-strip line filter takes the GGG substrate material (3), needed for the growth of the YIG layer (2), as a substrate; a layer of metal micro-strip line (4) in single conduction band is printed on the upper surface of the GGG substrate material (3), on which the YIG layer (2) is grown, along a central axis in a length direction; the two piezoelectric layers (1) are respectively arranged at two sides of the metal micro-strip line. Compared with a traditional micro-strip line filter, the miniaturization of the micro-strip line filter can be realized due to the advantages of high dielectric constant (epsilon is greater than 10) and high magnetic permeability (mu is greater than 10) of YIG material and piezoelectric material. According to the micro-strip line filter disclosed by the invention, the GGG substrate material of which the length-width size is the same as that of a YIG thin film is selected, and thus the selecting difficulty on size of the YIG material is reduced.

Description

technical field [0001] The invention relates to a microstrip line filter co-substrated with a ferrite thin film material and an adjustment method thereof. Background technique [0002] In recent years, because the operating frequency of the traditional filter is relatively single, it is impossible to adjust its operating frequency band, and it is also impossible to accurately adjust its operating frequency point. Some scholars have tried to use ferrite materials for filter design. The principle is mainly The relatively high dielectric constant of the ferrite medium is used to effectively reduce the size of the microwave filter; at the same time, due to the ferrite medium under the condition of an external bias magnetic field, the ferromagnetic resonance effect will occur, and the piezoelectric material will be due to The application of an electric field produces a capacitive effect that deforms and restrains the deformation of the contacted ferrite layer, thus affecting the ...

AI Technical Summary

Problems solved by technology

This increases the difficulty and complexity in the design and manufacture of the filter. Moreover, the use of a ferrite material substrate requires a filter substrate, which will relatively increase the size of the filter, which is not conducive to its miniaturization development.

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