TY - JOUR T1 - Circularly Polarized Double Layered Printed Hemispherical Helical Antenna with a Parasitic Wire for Bandwidth Enhancement JO - Frequenz PY - 2014/07/01 AU - Latef TA AU - Khamas SK AU - Reza AW ED - DO - DOI: 10.1515/freq-2013-0149 PB - Walter de Gruyter GmbH VL - 68 IS - 7-8 Y2 - 2025/08/14 ER -