A compact uniform circular array antenna for circularly polarized higher-order OAM beam generation through modes superposition - Umar Fayyaz; Yosef T. Aladadi; Abdul Aziz; Shahab Ahmad Niazi; Syed Tamoor Shah; Sulaiman Al-Sowayan; Zaid Ahmed Shamsan; Rifaqat Hussain (PLoS ONE, 2026)