The helicon antenna is an interesting candidate for omnipolarization application in addition to the power handling. Thus, the helicon antenna is one of the most important popular types, which is used for space communication such as space telemetry, space probes, and tracking satellite. A helicon antenna was investigated to achieve fixed axial ratio (nearly equal to one), low standing wave ratio (SWR), high gain and low sidelobe level over a wide frequency band (2 - 4GHz). As well as, the dual sense of circular polarization (right and left hand circular polarization) can be obtained. The helicon antenna was designed as a nonuniform or quasi - taper helix, which consists of a combination of two uniform helix sections and two tapered helix sections with dual feeding points (feeding at both ends), and situated above a conical reflector. The feasibility of this design has been demonstrated with an experimental model of the helicon antenna. A planar array was investigated to achieve more directivity and beam scanning. The distribution of the planar array was arranged as rectangular and triangular cells. The rectangular array consists of four helicon antennas and the triangular consists of three helicon antennas. The two-cell distribution types were designed. The analysis was given for a nine-element helicon antenna to simulate the two types of distributions.