PIER Letters
Progress In Electromagnetics Research Letters
ISSN: 1937-6480
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By X.-Q. Yang, Z.-H. Yan, T.-L. Zhang, and B. Fan

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A new printed helical antenna (PHA) for a circularly polarized (CP) titled beam is proposed. With the introduction of a multiple sections technique into the PHA's helical arm, the antenna radiates a CP titled beam. To feed the antenna, a matching network composed of a 50 Ω microstrip transmission line and two symmetrical λ0/8 open stubs is designed. The simulated and measured results show that the PHA radiates a CP tilted beam with a maximum radiation direction of (θmax, φmax) = (32°, 135°) at f0 = 2.11 GHz. The measured bandwidth with a reflection coefficient lower than −10 dB is 11.8% (1.99-2.24 GHz), and the experimental results for the radiation pattern, gain, and axial ratio (AR) are also presented.

X.-Q. Yang, Z.-H. Yan, T.-L. Zhang, and B. Fan, "A Novel Printed Helical Antenna for a Circularly Polarized Tilted Beam," Progress In Electromagnetics Research Letters, Vol. 53, 51-55, 2015.

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