2000 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.

IEEE Transactions on Antennas and Propagation
Volume 48 Number 6, June 2000

Traveling-Wave Analysis of a Bifilar Scanning Helical Antenna

Page 1007.

Abstract:

The bifilar scanning helical antenna is analyzed by considering the structure to carry a single traveling wave. It is shown that the relative phase velocity (v/c) must equal unity to yield the scanning features shown by numerical experiment. This is at complete odds with monofilament helices (Kraus), which display a slow wave structure.

References

1. H. Nakano, H. Mimaki and J. Yamauchi, "Loaded bifilar helical antenna with small radius and large pitch angle", Electron. Lett., vol. 27, no.  17, pp.  1568-1569, 1991.
2. J. D. Kraus, Antennas, 2nd ed.   New York: McGraw-Hill, 1988, ch. 7.