Enhanced Underground Communication: A Circularly Polarized Smart Antenna with Beam Steering for Improved Coverage by Muhammad Ahsan Mahboob, Muhammad Ahsan Ashraf, Iqra Atif, Hajime Ikeda, Glen T. Nwaila, Amer Masood, Jahanzeb Qureshi, Bekir Genc, Inamullah Khan, Bruce Mellado

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