Piano Radar System Using Coupled-Resonator Near-Field Sensing Radar

This study presents the development of a ‘piano radar system’ utilizing a single-port coupled resonator nearfield sensing radar. The proposed radar system incorporates substrate integrated waveguide (SIW) and complementary splitring (CSR) slot structures. To facilitate real-time measurements and convenient expansion into various application scenarios, a transceiver board used for measuring reflection parameters, was constructed to extract port information in realtime. An experiment demonstrates that a ‘piano radar’ using this technique can detect finger positions in real-time, and based on different finger positions, it emits corresponding analog piano sounds through an application program.