| 摘要 |
A quadrifilar helix antenna has four inter-twined helical antenna elements offset from one another by 90°. The elements are identical and each can be defined by an axial coefficient z, a radial coefficient r, and an angular coefficient theta. While the radial coefficient r remains constant along the axis of the elements, the axial coefficient is defined in terms of the angular coefficient according to:where a,b,c, and d are constants which control the non-linearity of the helical element and lax is the axial length of the element.
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