WAVE PROBING SYSTEM WITH OPTIMAL MUTUAL ORIENTATION OF TRANSMITTING AND RECEIVING ARRAYS FOR VISUALIZATION OF SCATTERING OBJECTS
The article proposes a system for wideband wave probing with multiple transmitters and multiple receivers. The elements in the array of transmitters and in the array of receivers are arranged in a hexagonal grid with the same step. The arrays are located in the same plane, but rotated to an optimally selected angle, which can significantly reduce the level of artifacts while maintaining the high resolution of reconstructed wave images. The system can be implemented both for radio waves in the scalar approximation and for ultrasonic waves. The system of ultrasonic probing in air consists of 32 transmitters and 61 receivers with an operating frequency band from 38 to 43 kHz, which allows obtaining a resolution of up to 10 mm in a parallel plane and 60 mm in range. The digitization is based on the under-sampling technology at a frequency of 18 kHz. Experimental studies have confirmed the possibility of obtaining high-resolution ultrasound images using the proposed system.