30W and 20dB attenuator with aluminium nitride ceramic baseplate

Abstract

The invention discloses a 30W and 20dB attenuator with an aluminium nitride ceramic baseplate. The attenuator comprises a 5*5*1mm aluminium nitride baseplate, wherein a rear-of-conductor layer is printed at the back of the aluminium nitride baseplate; a wire and a resistor are printed on the front face of the aluminium nitride baseplate; and the wire is connected with the resistor to form an attenuation circuit which is symmetrical relative to the central line of the aluminium nitride baseplate, the output end and input end of the attenuation circuit are respectively connected with a bonding pad, and the two bonding pads are symmetrical relative to the central line of the aluminium nitride baseplate. By way of changing the size and surface resistivity of the resistor in the attenuation circuit, a required attenuation value can be obtained; and by means of design of the wire, better standing wave feature can be achieved. As the resistor area is enlarged, high and low temperature impact resisting property of the attenuator is enhanced, thereby avoiding hardening of the resistor caused by high temperature when a lead is welded at the output end, and then avoiding the risk of damage in practical use arising from the hardening of the resistor, therefore the property of the attenuator is greatly improved, which changes the situation that attenuators in the prior art are only applicable to low frequency, and ensures that the attenuator disclosed by the invention can be used in 2G-3G (second generation-third generation) networks.

Description

technical field [0001] The invention relates to an aluminum nitride ceramic attenuation sheet, in particular to a 30-watt 20dB attenuation sheet with an aluminum nitride ceramic substrate. Background technique [0002] The attenuator is to attenuate the large voltage signal to a certain proportional multiple (generally referred to as power attenuation) according to the actual requirements to achieve a safe or ideal level value, which is convenient for testing, especially widely used in radio frequency and microwave. At present, most communication base stations are The high-power ceramic load chip is used to absorb the reverse input power in the communication components. The high-power ceramic load chip can only simply consume and absorb excess power, but cannot monitor the working status of the base station in real time. When the base station fails, It is impossible to make a judgment in time and has no protective effect on the equipment. The attenuator can not only absorb ...

AI Technical Summary

Problems solved by technology

At present, when the frequency band used by the attenuator on the market is higher than 2G, the attenuation accuracy cannot meet the requirements, and the return loss becomes larger, which cannot meet the application requirements of the frequency band above 2G.

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