Shun Yao

An Origami Reconfigurable Axial-Mode Bifilar Helical Antenna

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.

Reconfigurable helical antenna based on an origami structure for wireless communication system

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 up to 1.28 GHz was achieved, and the height of the folded state could be reduced to 17% of the height of the unfolded state.

A novel reconfigurable origami spring antenna

A foldable origami spring structure is presented in this paper, which can be expanded and collapsed. Based on this structure, one origami antenna is designed with operating frequency that can be changed based on its height. The return loss, far-field radiation pattern and peak gain of this antenna are presented.

A novel reconfigurable origami accordion antenna

An accordion origami structure is presented, which can be expanded and collapsed. Based on this structure, one origami antenna is designed with operating frequency that can be changed based on its height. A prototype antenna model is manufactured to validate the simulation model. The return loss, far-field radiation pattern and peak gain of this antenna are reported using simulations and measurements.

A novel tunable origami accordion antenna

A novel origami accordion antenna structure is presented, which can be expanded and collapsed. Based on this structure, one origami antenna is designed with operating frequency that can be changed based on its height. The return loss, far-field radiation pattern and peak gain of this antenna are examined.

Reconfigurable origami equiangular conical spiral antenna

This paper presents a balanced reconfigurable origami conical spiral antenna that can axially radiate at two states: (a) circularly polarized (AR<;3 dB) from 1.85 GHz to 2.75 GHz, and (b) linearly polarized at 1.4 GHz and 3.7 GHz. This antenna can be applied to various wireless communications, such as, GPS, radars and satellites. The simulated realized gains of the two states are over 7 dB.

Origami Quadrifilar Helix Antenna in UHF band

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.

Reconfigurable spherical helical Electrically Small Antenna in UHF band

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 98% for both states.

Deployable origami Yagi loop antenna

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 antennas body is 20.5 cm long when it is expanded to the working state. The physical parameters of the antenna such as loops radius and distances between loops are analyzed. The antenna is designed to work at 1.31 GHz. A directional realized gain of 10.4 dBi is observed. The measurements agree well with the designed simulation model.

A mode reconfigurable Nojima origami antenna

A 2-mode reconfigurable origami Nojima antenna is explored. When the antenna is folded, it is directional mode and when it is totally unfolded, it is omnidirectional. The operational frequency of this antenna is 1.61 GHz at folded state and 0.66 GHz at unfolded state.