New Pattern Reconfigurable Circular Disk Antenna Using Two PIN Diodes for WiMax/WiFi (IEEE 802.11a) Applications. - Yasir I. A. AI-Yasir; Naser Ojaroudi Parchin; Ali A. S. Alabdullah; Widad Faraj A. Mshwat; Atta Ullah; Raed Abd-Alhameed (SMACD, 2019)