A Numerical Study of Coaxial Helical Antennas
William Coburn
U.S. Army Research Laboratory
A FEKO model was constructed to investigate two helical antennas integrated coaxially on a shaped ground plane. Ideally, these antennas would have a reasonable gain and axial ratio (AR) over a 0.5–1.7 GHz BW and they could be driven in parallel to provide a near 50 Ω input impedance to serve as a potential wideband antenna. Alternatively, by using an impedance transformer the antennas can be switched to allow dual-band operation. The FEKO model is described and results are presented for both cases. The results encourage further virtual prototyping and prototype fabrication for model validation.
25th Annual Review of Progress in Applied Computational Electromagnetics
2009
March
654-659
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