Large-power 100 W-9 dB attenuation sheet with aluminum nitride ceramic substrate

Abstract

The invention discloses a large-power 100 W-9 dB attenuation sheet with an aluminum nitride ceramic substrate. The sheet comprises an aluminum nitride substrate, wherein a conductor layer is printed at the back side of the aluminum nitride substrate; a plurality of resistors and silver paste lead wires are printed at the front side of the aluminum nitride substrate; the silver paste lead wires are connected with the resistors to form an attenuation circuit; and glass protective films are printed on the resistors. The needed attenuation value is obtained by changing the size of resistance value and surface resistivity in the attenuation circuit and good stationary wave properties can be obtained through the design of the lead wires. According to the large-power 100 W-9 dB attenuation sheet with the aluminum nitride ceramic substrate provided by the invention, the area of the resistors is enlarged, the high and low temperature impact resistance of the attenuation sheet is increased and the performance indexes of products meet the requirements. Meanwhile, the quenching damages to the resistors at a high temperature when an output end is welded with the lead wires are avoided, the risk of damaging the resistors in the actual use process due to quenching the resistors is avoided, the design of the circuit is improved, the attenuation precision reaches 9+ / -0.8 dB within 3 G (Gigabyte) and the standing wave satisfies the market demand, so that the products can be applied to 3G (The 3rd Generation Telecommunication) networks.

Description

technical field [0001] The invention relates to an aluminum nitride ceramic attenuation sheet, in particular to a high-power aluminum nitride ceramic substrate 100W-9dB attenuation sheet. Background technique [0002] At present, most communication base stations use high-power ceramic load chips to absorb the reverse input power of communication components. High-power ceramic load chips can only simply consume and absorb excess power, but cannot monitor the working conditions of the base station in real time. When the base station fails, it cannot be judged in time, and there is no protection for the equipment. [0003] The attenuator can not only absorb the reverse input power of the communication components in the communication base station, but also extract some signals from the communication components, monitor the base station in real time, and protect the equipment. However, the current domestic 100W-9dB aluminum nitride The attenuation accuracy of ceramic attenuators...

AI Technical Summary

Problems solved by technology

The above problems are mainly due to the design of the domestic 100W-9dB attenuator, and the poor performance of high and low temperature impact resistance

After completing the high and low temperature impact test, the impedance and attenuation accuracy deviated from the actual required range, so that the attenuation accuracy could not meet the requirements

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