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A new c-band miniaturized microwave isolator and its application

An isolator and microwave dielectric technology, which is applied to waveguide-type devices, electrical components, circuits, etc., can solve the limitation of the miniaturization design of isolators, the inability to miniaturize microwave isolation devices, and the inability to meet the development needs of miniaturization of microwave isolators, etc. problem, to achieve the effect of solving the problem of miniaturization and high dielectric constant

Active Publication Date: 2016-03-16
ZIJINSHAN ASTRONOMICAL OBSERVATORY CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Microwave circulators or isolators are mainly based on the non-reciprocity of ferrite materials under the combined action of DC bias magnetic field and microwave magnetic field, and the dielectric constant εr of microwave ferrite materials is generally between 12-15 Among them, due to the anticorrelation between the electrical size of the microwave device and the dielectric constant εr of the microwave dielectric material, its small dielectric constant severely limits the miniaturization design of the isolator, and the existing ferrite materials cannot be used for microwave isolation devices. Further miniaturization cannot meet the development needs of microwave isolator miniaturization

Method used

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  • A new c-band miniaturized microwave isolator and its application
  • A new c-band miniaturized microwave isolator and its application

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Experimental program
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Effect test

Embodiment 1

[0026] Embodiment 1 Preparation of novel ferromagnetic / ferroelectric composite material

[0027] According to the conditions in Table 2, the ferrite YAlIG-16A and the modified bismuth ferrite BLFTO powder were mixed uniformly for solid-state sintering. Among them, YAlIG-16A ferrite was purchased from Mianyang West Magnetic Technology Co., Ltd., modified bismuth ferrite (Bi 0.87 La 0.13 )(Fe 0.92 Ti 0.08 )O 3 , prepared by solid phase sintering method, as follows:

[0028] Raw material Bi 2 o 3 , Fe2 o 3 , La 2 o 3 and TiO 2 According to the molar ratio, it is 0.87:0.92:0.13:0.16 ratio. Calculate, weigh, pulverize and mix for 2 hours, dry for 1 day, press into tablets, pre-fire at 680 ° C for 5 hours, pulverize and mix again, press and sinter, sintering temperature 880 ° C, holding time 2 hours, surface polishing treatment.

[0029]

Material 1

Material 2

Material 3

YAlIG-BLFTO (v / v)

1:0.8

1:1

1:1.2

Sintering temperatu...

Embodiment 2

[0032] Embodiment 2 Preparation of C-band Miniaturized Microwave Isolator

[0033] Select the composite material in Example 1, according to C.E.Fay and R.L.Comstock circulator design theory, based on the electromagnetic parameters of the new composite material YAlIG-BLFTO and ferrite YAlIG-16A under the normal temperature 300K shown in Table 1 and Table 3, respectively design frequency The dimensions of room temperature stripline Y-junction circulators ranging from 4.5GHz to 5.5GHz are shown in Table 4:

[0034]

Material 1

Material 2

Material 3

YAlIG-16A

Y-junction stripline center conductor circle diameter

4.5mm

5mm

5.5mm

8.2mm

Microwave dielectric diameter

8mm

9mm

9.9mm

14.7mm

[0035] The structural schematic diagram of the room temperature stripline Y-junction circulator made of the above-mentioned composite materials is as follows: figure 1 As described above, it includes a Y-junction stripline...

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Abstract

The invention provides a ferromagnetism / ferroelectricity composite material which comprises ferrite YA1IG-16A and modified bismuth ferrite BLFTO, and the molecular formula of the modified bismuth ferrite BLFTO is (Bi0.87La0.13) (Fe0.92Ti0.08) O3, wherein the volume ratio of the YA1IG-16A and the modified bismuth ferrite BLFTO is 1:(0.8-1.2). The invention further provides a preparation method of the ferromagnetism / ferroelectricity composite material and a C-waveband miniaturized microwave isolator manufactured through the ferromagnetism / ferroelectricity composite material. The ferromagnetism / ferroelectricity composite material can be used for aerospace, microwave communication and radar receiver systems. The bottleneck of miniaturization of microwave isolators is broken through, the novel ferromagnetism / ferroelectricity composite material has high dielectric constant, the miniaturization problem of microwave isolators can be fundamentally solved, and the ferromagnetism / ferroelectricity composite material is the key technology of miniaturization of microwave isolators.

Description

technical field [0001] The invention belongs to the field of wireless communication, in particular to a C-band miniaturized microwave isolator based on novel ferromagnetic / ferroelectric composite materials and its application in aerospace, microwave communication and radar receiver systems. Background technique [0002] Microwave circulators or isolators made of microwave ferrite exhibiting gyromagnetic effect under the combined action of DC magnetic field and microwave radio frequency field play an important role in the inter-stage isolation and antenna sharing of radar systems, and become the key to radar systems device. With the rapid development of 3G, 4G wireless communication technology, aerospace technology, satellite communication technology and military radar technology, the system is also developing towards integration and miniaturization; at the same time, microwave communication system and radar receiver system are also moving towards multi-beam Development in t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P1/36
Inventor 刘洁于剑张林林单文磊
Owner ZIJINSHAN ASTRONOMICAL OBSERVATORY CHINESE ACAD OF SCI
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