Microwave Acoustic Device Integration for In-Band Full-Duplex Applications

Simultaneous transmit and receive, or in-band full-duplex (IBFD), holds significant promise for radar and wireless communication systems using time-domain cancellation at radio frequencies. These systems rely on precise control of group delay to effectively mitigate self-interference. Piezoelectric-based traveling microwave acoustic wave devices provide a compact, passive means to implement such delays with high fidelity. This work explores the integration of piezoelectric acoustic delay lines to enhance self-interference cancellation (SIC) performance through precise group delay control and demonstrates SIC with such devices for a single tap demonstration.