Design of Impedance Matching for Sound Signal Channel of PIND Testing Equipment

Particle Impact Noise Detection (PIND) has been widely used in the detection of component redundancy due to its high efficiency and low cost. The traditional PIND device does not match the impedance of the sensor and the sound channel, so that the redundant signal will be attenuation and distortion in the transmission process, thus affecting its detection accuracy and sensitivity. Aiming at this problem, this paper presents a new scheme of impedance matching design, which uses the Smith chart method to match, and uses ADS simulation software to design impedance matching network. Finally, the matching experiment is used to verify the matching effect of impedance matching network.