Reconfigurable Axial-Mode Helix Antennas Using Shape Memory Alloys

Mazlouman, Shahrzad Jalali; Mahanfar, A.; Menon, Carlo; Vaughan, Rodney G.

doi:10.1109/tap.2011.2109686

Cited by 62 publications

(33 citation statements)

References 20 publications

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“…One cutting-edge solution implemented to alleviate this problem is the use of smart flexible materials [35]. For instance, a shape memory alloy (SMA) was utilized with a reconfigurable helical antenna to accomplish changes in height [36]. Applying a direct current (DC) through the SMA heats the material causing the SMA to contract, thereby reducing the height of the antenna.…”

Section: Flexible ''Origami'' Reconfigurable Antennasmentioning

confidence: 99%

Additively Manufactured Nanotechnology and Origami-Enabled Flexible Microwave Electronics

et al. 2015

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| Inkjet printing on flexible paper and additive manufacturing technologies (AMT) are introduced for the sustainable ultra-low-cost fabrication of flexible radio frequency (RF)/microwave electronics and sensors. This paper covers examples of state-of-the-art integrated wireless sensor modules on paper or flexible polymers and shows numerous inkjetprinted passives, sensors, origami, and microfluidics topologies. It also demonstrates additively manufactured antennas that could potentially set the foundation for the truly convergent wireless sensor ad-hoc networks of the future with enhanced cognitive intelligence and ''zero-power'' operability through ambient energy harvesting and wireless power transfer. The paper also discusses the major challenges for the realization of inkjet-printed/3-D printed high-complexity flexible modules as well as future directions in the area of environmentally-friendly ''Green'') RF electronics and ''Smart-House'' conformal sensors.

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Section: Flexible ''Origami'' Reconfigurable Antennasmentioning

confidence: 99%

Additively Manufactured Nanotechnology and Origami-Enabled Flexible Microwave Electronics

et al. 2015

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“…In [14], SMA springs are used in reconfigurable helix antennas. In this case, the primary radiating elements are made of SMA, and thus the efficiency is low.…”

Section: Shape Memory Alloysmentioning

confidence: 99%

Shape Memory Alloy (SMA)-Based Pattern-Reconfigurable Antenna

Kowalewski

Mahler

Reichardt

et al. 2013

Antennas Wirel. Propag. Lett.

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This letter presents a realization method of reconfigurable antenna systems based on smart materials. The reconfigurability is obtained by utilizing shape memory alloy directors. This realization method offers a longer lifetime and lower energy consumption than conventional approaches such as microelectromechanical systems (MEMS) or p-i-n diodes. As a proof-of-concept, a compact reconfigurable antenna for the 2.6-GHz Long Term Evolution (LTE) band was designed. The designed antenna is a quasi-Yagi antenna with its directors made from shape memory alloy. This antenna is made to be installed in a standard car-roof antenna housing. A prototype of the antenna presented here has been fabricated and measured.Index Terms-Automotive antenna, reconfigurable antenna, shape memory alloy (SMA), smart materials, Yagi.

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“…Despite that various antenna technologies have been developed to minimize the antenna dimension and optimize the antenna performance, most of the multiband antenna design suitable for mobile platforms and portable devices, including both the external and internal antennas, basically rely on the configurations of monopole , loop , IFA/PIFA , helix , or their combination and coupled structures to generate a multiband or broadband performance. In this work, a general idea of utilizing these antenna elements, including the monopole, loop, and the helix, is studied for the purpose of obtaining an integrated multiband/wideband antenna for current and future wireless applications.…”

Section: Introductionmentioning

confidence: 99%

General design approach of monopole and helix integrated antennas for radio apparatus

Ren

Hwang

2015

Micro & Optical Tech Letters

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A design approach of multiband and wideband antennas for radio communication devices is presented. The antenna is consisted of a monopole, a folded loop, and a helix. The fundamental behaviors of the single element and their combinations are analyzed to give desired bandwidths per the mutual coupling between elements. The ground plane dimension and the device thickness are considered. The study has a focus on the UHF and lower microwave range to support most of civilian applications. The presented antenna structure is a good starting point to be familiar with the multiband antenna design as the antenna can be configured to cover a wide frequency range to support cellular telephony, GPS, wireless local networking on so forth. A radio communications device incorporating such antennas is also described.

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Reconfigurable Axial-Mode Helix Antennas Using Shape Memory Alloys

Cited by 62 publications

References 20 publications

Additively Manufactured Nanotechnology and Origami-Enabled Flexible Microwave Electronics

Additively Manufactured Nanotechnology and Origami-Enabled Flexible Microwave Electronics

Shape Memory Alloy (SMA)-Based Pattern-Reconfigurable Antenna

General design approach of monopole and helix integrated antennas for radio apparatus

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