Resistance type attenuator

Abstract

The invention discloses a resistive attenuator in the field of resistive attenuators, which comprises a substrate, a middle microstrip line, a first microstrip line and a second microstrip line are arranged on the substrate, and the first microstrip line and the second microstrip line are symmetrically arranged on two sides of the substrate relative to the middle microstrip line; each of the first microstrip line and the second microstrip line is divided into three discontinuous sections, the first section and the third section are symmetrical about the second section in the middle, and thin-film resistor blocks, namely a first thin-film resistor block, a second thin-film resistor block and a third thin-film resistor block, are arranged between the first microstrip line and the second microstrip line of each section; the middle microstrip line is divided into four discontinuous sections by the first thin-film resistor block, the second thin-film resistor block and the third thin-film resistor block, and the resistance values of the first thin-film resistor block, the second thin-film resistor block and the third thin-film resistor block are adjusted through the laser technology. A multi-section resistor structure is adopted, each section of resistor can be independently adjusted, the average tolerance power of the attenuator can be effectively improved through the structure, and the resistance value of each section of resistor can be accurately controlled through laser.

Description

technical field [0001] The invention relates to the field of resistive attenuators, in particular to a resistive attenuator. Background technique [0002] In the microwave transmitting and receiving system, there will be a safe or normal requirement for the signal level. Too high level will cause overload, causing unacceptable nonlinear distortion or even burnt out of the amplifying parts, so that the whole system cannot work. The attenuator can adjust the signal level to the required level, and the attenuator plays an irreplaceable role in adjusting the gain of the microwave transmitting and receiving system, and is widely used in the microwave transmitting and receiving system. [0003] According to the different components that make up the attenuator, the attenuator can be divided into active attenuator and passive attenuator. As a kind of passive attenuator, resistive attenuator can be divided into thick film resistive attenuator and thin film resistive attenuator accor...

AI Technical Summary

Problems solved by technology

For a single-cell resistive attenuator, since the resistors are concentrated in one area, the overall power of the attenuator is relatively small, and the power cannot be distributed well.

The multi-section resistive attenuator has multiple resistance areas, which can increase the average withstand power of the attenuator to a certain extent, but the current multi-section resistive attenuator, the microstrip line at both ends of the resistance area is a continuous whole , which leads to the inability to achieve individual fine adjustment of the resistance area of ​​a single section, and cannot further improve the average withstand power of the attenuator

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