A Folded Printed Quadrifilar Helical Antenna Employing a Compact Feeding Network
نویسندگان
چکیده
Abstract—A folded printed quadrifilar helical antenna (FPQHA) with an integrated and compact feeding network is proposed. The axial length of the proposed antenna is miniaturized of about 54.7% than the conventional PQHA by folding the helix arms into several elements. A T-junction power divider combining with two Wilkinson power dividers is utilized to feed the antenna. A fabricated prototype of the FPQHA using the compact feeding network is presented. The measured positive gain bandwidth covers 380–430MHz with the reflection coefficient below −20 dB, axial ratio below 1.5 dB and a half-power beamwidth of about 120◦. Details of the proposed antenna design and experimental results are presented and discussed.
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