Assessment of the Robustness of Flexible Antennas to Complex Deformations

Altinozen, Ekrem; Vuković, Ana; Sewell, P.

doi:10.1109/tap.2023.3262671

Cited by 3 publications

(1 citation statement)

References 43 publications

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“…For instance, liquid metal can be poured into PDMS microchannels to prepare antennas that can withstand tensile variations [ 15 , 16 , 17 ], and the two-dimensional serpentine structure can endow the antenna with stretchability [ 18 ]. However, flexibility is a double-edged sword that always provides limited or inconstant properties of the antenna during bending attachment [ 19 , 20 , 21 , 22 , 23 , 24 , 25 ]. Currently, alternative methods for this problem such as structural design and improved manufacturing technology can be used to achieve robust EM features of flexible antennas during deformation.…”

Section: Introductionmentioning

confidence: 99%

Flexible Symmetric-Defection Antenna with Bending and Thermal Insensitivity for Miniaturized UAV

Nan,

Kang,

Zhang

et al. 2024

Micromachines

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Flexible conformal-enabled antennas have great potential for various developable surface-built unmanned aerial vehicles (UAVs) due to their superior mechanical compliance as well as maintaining excellent electromagnetic features. However, it remains a challenge that the antenna holds bending and thermal insensitivity to negligibly shift resonant frequency during conformal attachment and aerial flight, respectively. Here, we report a flexible symmetric-defection antenna (FSDA) with bending and thermal insensitivity. By engraving a symmetric defection on the reflective ground, the radiated unit attached to the soft polydimethylsiloxane (PDMS) makes the antenna resonate at the ISM microwave band (resonant frequency = 2.44 GHz) and conformal with a miniaturized UAV. The antenna is also insensitive to both the bending-conformal attachment (20 mm < r < 70 mm) and thermal radiation (20~100 °C) due to the symmetric peripheral-current field along the defection and the low-change thermal effect of the PDMS, respectively. Therefore, the antenna in a non-bending state almost keeps the same impedance matching and radiation when it is attached to a cylinder-back of a UAV. The flexible antenna with bending and thermal insensitivity will pave the way for more conformal or wrapping applications.

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Section: Introductionmentioning

confidence: 99%

Flexible Symmetric-Defection Antenna with Bending and Thermal Insensitivity for Miniaturized UAV

Nan,

Kang,

Zhang

et al. 2024

Micromachines

View full text Add to dashboard Cite

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A State-of-the-Art Review on 4D Printed Antennas and Other Adaptable Designs

Carvalho,

Reis,

Caldeirinha

2024

IEEE Access

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This article offers a thorough review of the current state-of-the-art in four-dimensional (4D) printed antennas and possible adaptable designs. It provides a succinct examination of various categories of materials used in three-dimensional (3D) and 4D printing, including the utilization of smart materials available in both printable and synthesized forms. The review encompasses a concise analysis of fabrication techniques, stimuli, and response behaviors applied in various types of smart materials. These materials have the potential to fabricate antennas with tunable and reconfigurable properties, including frequency of operation, bandwidth, gain, and radiation pattern. Given the novelty of applying 4D printing in antenna technologies, the review also considers additional reconfigurable antennas with mechanically tunable properties, as well as those in non-printed formats. This exploration hints at potential adaptations to the latter for the development of 4D printed antennas. The utilization of 4D printing presents a complex yet intriguing approach to antenna fabrication, offering the possibility of creating dynamic antennas with sophisticated characteristics.

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