Abstract —This paper presents an origami Quadrifilar Helix Antenna (QHA) which could work at different operating frequencies in Ultra High Frequency (UHF) band with different heights for optimum realized gain. This antenna is designed to be applied to space wireless communication with little limitations of storage or transportation due to a compact size. Principle of this design was first validated by the ideal helix antenna model. The simulated frequency reconfigurability of QHA is up to 1.92 GHz, and the height of the folded state is 26% of the height of the unfolded state. I. I NTRODUCTION Rigid origami structures are playing enormous roles in the modern world ranging from space satellite to paper shopping bags for their portability and compact size [1]. As demonstrated in this paper, a rigid origami structure is applied to construct collapsible and re-configurable QHA. A deployable helix antenna was proposed in [2]. However, its compacted height is limited by the strip width and hinges size. Also, this deployable structure would be complicated to construct bifilar helix antenna or QHA, whose compacted size would probably be further enlarged. This paper proposed an origami QHA with a frequency reconfigurability over 1.92 GHz. Simulated gain is over 7 dB at operating frequencies. It could be constructed with copper foil on rigidly foldable paper base, which makes the antenna light-weight, more compactable, portable and economic. This design provides a new direction for satellite communication and global positioning systems. It could also be used in disposable devices. II. T