Pinching-Antenna S(PASS)-enabled Multicast Communications

Pinching-antenna system (PASS) is a novel flexible-antenna technology, which employs long-spread waveguides to convey signals with negligible path loss and pinching antennas (PAs) with adjustable positions to radiate signals from the waveguide into the free space.Therefore, short-distance and strong line-of-sight transmission can be established.In this paper, a novel PASS-enabled multicast communication framework is proposed, where multiple PAs on a single waveguide radiate the broadcast signals to multiple users.The multicast performance maximization problem is formulated to optimize the positions of all PAs.To address this non-convex problem, a particle swarm optimizationbased algorithm is developed.Numerical results show that PASS can significantly outperform the conventional multiple-antenna transmission.