螺旋型天线

Array of four axial-mode helical antennas used as a satellite tracking-acquisition antenna, Pleumeur-Bodou, France

Helical antenna:

(B) Central support,

(C) Coaxial cable feedline,

(E) Insulating supports for the helix,

(R) Reflector ground plane,

(S) Helical radiating wire

螺旋形天线是一种由一个或多个导线缠绕而成的螺旋型天线。由一根导线所构成的螺旋形天线称为单股天线；而由两个或四个螺旋状导线构成的天线则分别称为双股 (Bifilar) 或四股(Quadrifilar)螺旋天线。