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In this work an origami based helical antenna is electromagnetically and mechanically analyzed and tested. The Kresling pattern is used to accommodate the helical nature of the antenna design. First, a mechanical analysis is performed showing that by increasing the number of the sides, the structure becomes more stable and it is easier to fold. An 8-sided design is chosen based on our results. The electromagnetic analysis of the antenna shows that it achieves a realized gain of 8.1 dB and that is circularly polarized. The antenna is fabricated and tested. Our results exhibit very good agreement between simulations and measurements.