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Surface-mounted subminiaturized isolator

A kind of isolator, ultra-miniature technology, applied in the field of surface mount ultra-miniature isolators, can solve the problems of not suitable for surface mount, large structure, not easy to integrate microcircuits, etc., to achieve indicators and high reliability, The effect of reducing the size of the device and reducing the volume

Inactive Publication Date: 2013-04-03
南京广顺电子技术研究所有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this isolator has the defects of large structure, not suitable for surface mounting, and not easy for microcircuit integration.

Method used

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  • Surface-mounted subminiaturized isolator
  • Surface-mounted subminiaturized isolator

Examples

Experimental program
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Effect test

Embodiment 1

[0014] Example 1: Such as figure 1 and 2 As shown, a surface-mount ultra-miniature isolator includes a cavity 1 and a load chip 8. The length, width and height of the cavity 1 are respectively: 10×10×5.5mm, and the inner surface of the cavity 1 A silver plating layer is provided, and the load chip 8 is welded on the cavity 1 through solder paste.

[0015] A first microwave ferrite 21, a central conductor 3, a second microwave ferrite 22, a shim 4, a permanent magnet 5, and temperature compensation sheets 61, 62 are sequentially placed in the cavity 1; The end of the mouth is covered with a magnetic circuit board 7, and the two pins 9 of the central conductor 3 pass through the port on the cavity 1 and extend to the outside of the cavity and are bent into a step shape along the outer wall of the cavity. The bottom surface of the body 1 is located on the same plane, and the other pin 10 is connected to the welding spot of the load chip 8 by welding.

[0016] Wherein, the fi...

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PUM

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Abstract

The invention discloses a surface-mounted subminiaturized isolator which comprises a cavity. A load chip is fixed onto the cavity, and a first microwave ferrite, a central conductor, a second microwave ferrite, a shimming sheet, a permanent magnet and temperature compensation sheets are sequentially placed in the cavity; and a magnetic circuit plate covers an opening end of the cavity, two pins of the central conductor penetrate through a port on the cavity, extend out of the cavity and are bent into steps along the walls of the cavity, ends of the two pins and the bottom surface of the cavity are positioned on the same plane, and another pin of the central conductor is connected with the load chip. The surface-mounted subminiaturized isolator has the advantages that the ceramic loop ferrites with high dielectric constants are adopted, and the size of the surface-mounted subminiaturized isolator is reduced; the pins of the central conductor are bent to be parallel to the bottom surface of the cavity, and accordingly the surface-mounted subminiaturized isolator is suitable to be mounted on a surface; and the temperature compensation sheets are made of iron-nickel alloy, and accordingly the surface-mounted subminiaturized isolator is good in working stability at an extreme temperature, has high indexes and is high in reliability.

Description

technical field [0001] The invention relates to an isolator used in a Beidou satellite navigation application system, in particular to a surface-mounted ultra-miniature isolator. Background technique [0002] In the existing embedded isolator structure, discrete magnetically permeable materials are used as shells, that is, magnetically permeable materials are glued around the cavity with adhesive. The first microwave ferrite (without ceramic ring dielectric), the central conductor, the second microwave ferrite, the magnetic disc, the permanent magnet and the temperature compensation sheet are sequentially installed in the cavity, and the upper and lower sides are respectively the second The second magnetically permeable material and the third magnetically permeable material, the second magnetically permeable material and the third magnetically permeable material are respectively fixed on the cavity with screws, the permanent magnet provides a bias magnetic field for the ferr...

Claims

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Application Information

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IPC IPC(8): H01P1/36H01P1/30
Inventor 陆敬文唐正龙
Owner 南京广顺电子技术研究所有限公司
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