[1]
“Design Study of Normal Mode Helical Antenna with Dual-Frequency and Circular Polarization Used in Mobile”, J. eng. sustain. dev., vol. 17, no. 3, pp. 79–93, Aug. 2013, Accessed: May 18, 2024. [Online]. Available: https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/999