Engineering Physics Annotation << Back Modeling and Experimental Study of a Microstrip Sensor for Recording high-speed Microparticles during Partial Destruction of a Conductor Telegin A.M., Kalaev M.P. The authors propose a method for detecting high-speed microparticles (micrometeoroids and space debris) smaller than 1 mm in size based on an analysis of the parameters of a microstrip transmission line (ML) with partial damage to its upper conductor. Unlike existing solutions, the proposed method enables the detection of particle impacts that do not lead to a complete circuit break, expanding the range of detectable sizes. Using the ABCD-matrix formalism, a theoretical simulation of the effect of local conductor narrowing on the transmission coefficient and time delay of a microwave signal was conducted. Experimental verification was performed on a sensor prototype made of FR-4 fiberglass using the spark crater simulation method. Measurements using a vector network analyzer confirmed the theoretical calculations: it was shown that partial damage causes measurable changes in the standing wave ratio (SWR) and an attenuation of the S21 signal of 0,1 dB. The advantages of the developed sensor are its low weight, compactness, low power consumption, and compatibility with onboard equipment of small spacecraft. Keywords: micrometeoroids, microstrip transmission line, sensor, space debris particles. DOI: 10.25791/infizik.7.2026.1563 Pp. 03-13.