A Broadband Folded Printed Quadrifilar Helical Antenna Employing a Novel Compact Planar Feeding Circuit

作者：Caillet Mathieu^*; Clenet Michel; Sharaiha Ala; Antar Yahia M M

来源：IEEE Transactions on Antennas and Propagation, 2010, 58(7): 2203-2209.

DOI：10.1109/TAP.2010.2048865

• Antenna feeds
• broadband
• helical antennas
• microstrip antennas
• microstrip transitions
• planar circuits
• satellite navigation systems

A broadband printed quadrifilar helical antenna employing a novel compact feeding circuit is proposed in this paper. This antenna presents an excellent axial ratio over a wide beamwidth, with a 29% bandwidth. A specific feeding circuit based on an aperture-coupled transition and including two 90 surface mount hybrids has been designed to be integrated with the quadrifilar antenna. Over the bandwidth, the measured reflection coefficient of the antenna fed by the wideband compact circuit has been found to be equal to or lower than -12 dB and the maximum gain varies between 1.5 and 2.7 dBic from 1.18 to 1.58 GHz. The half-power beamwidth is 150 degrees, with an axial ratio below 3 dB over this range. The compactness of the feeding circuit allows small element spacing in array arrangements.

• 出版日期2010-7