Six-terminal network-type kilowatt-class radiofrequency power resistor

Abstract

The present invention proposes a six-terminal network-type kilowatt-level radio frequency power resistor, which includes a flange and a substrate, and also includes an A-surface electrode, a B-surface electrode, and a side electrode. The A-surface electrode is on the upper surface of the substrate, and the B-surface The electrodes are on the lower surface of the base body, the side electrodes are on the side of the base body and connect the A-side electrodes and the B-side electrodes, the resistor body is located on the A-side electrode and ensures a stable overlap with the A-side electrode lap end; it also covers the resistor body The dielectric protective layer plays a protective role on the top; the metal lead is welded on the electrode on the A side by welding process; the package cover is bonded to the upper surface of the substrate by high temperature adhesive. The invention has the advantages of: adopting the principle of graded derating, the three bases can bear a certain power respectively, avoiding the heat accumulation phenomenon caused by power concentration on a single base, and greatly increasing the power bearing capacity of the whole resistor. The overall distribution parameters of the resistors are reduced, so that the frequency characteristics of the resistors are improved.

Description

technical field [0001] The invention relates to the field of resistors, in particular to a six-terminal network type kilowatt-level radio frequency power resistor. Background technique [0002] Manufacturing of ordinary radio frequency power resistors, including flange, substrate, B-side conductive film layer on the lower surface of the substrate, A-side electrode film layer on the upper surface of the substrate, and electrode film layer on the upper surface of the substrate and overlapped with the A-side electrode film layer The resistive film layer, the glass dielectric film layer on the upper surface of the substrate and covering the entire resistor body for protection, and the ceramic cover plate located on the outermost layer of the entire resistor to protect the integrity of the resistor. [0003] Traditional RF power resistors use a single substrate to carry the resistor body to absorb power, and the absorbed power is dissipated in the form of heat energy through the ...

AI Technical Summary

Problems solved by technology

With the increasing power requirements of radio frequency power resistors in modern broadcasting communication technology, the resistor body needs an increasingly larger area to absorb power, but when the power reaches the kilowatt level, simply increasing the area of ​​the resistor body cannot solve the problem of heat dissipation. The problem is that the heat will be concentrated in the center of the substrate to generate heat accumulation, which will cause the temperature in the center of the resistor body to rise sharply, resulting in thermal breakdown and causing the resistor to fail

And if the RF power resistor of a single substrate is to achieve the ability to absorb kilowatt-level power and cause heat accumulation at the same time, then the area of ​​the substrate and the resistor body must be very large. If the resistor body area is too large, it will bring too large parasitic parameters. If the substrate area is too large, it will be deformed due to uneven heating.

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