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This communication presents a new reconfigurable origami bifilar helical antenna. This antenna can change its operating frequencies by changing its height. Also, analytical equations for the design of such antennas are derived based on an equivalent model of a standard helical antenna. An origami bifilar helical antenna is designed and its performance is verified using simulations and measurements.
A Yagi loop antenna, which is built on an origami spring structure, is presented here. The Yagi loop array can be compressed to 5 cm length by a servo motor which can reduce nearly 70% of the volume of the array. The antenna's body is 20.5 cm long when it is expanded to the working state. The physical parameters of the antenna such as loop's radius and distances between loops are analyzed. The antenna...
This paper presents a TE10 mode spherical helical Electrically Small Antenna (ESA) for ground communication applications. By choosing proper physical dimensions of the antenna, it could operate at unfolded and folded states for different operating frequencies. And the simulated and measured frequency reconfigurabilities are respectively 34 MHz and 33.2 MHz. Simulated radiation efficiencies are over...
This paper presents a reconfigurable axial mode helical antenna which could be folded and unfolded using rigidly foldable origami structure to work at different resonant frequencies for kinds of wireless systems. Measured results show that the folded state could operate at both 1.82 GHz and 2.14 GHz. And the measured operating frequency for the unfolded state is 860 MHz. The frequency reconfigurability...
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