Investigations of a Load-Bearing Composite Electrically Small Egyptian Axe Dipole Antenna

Baum, Thomas C.; Ziolkowski, Richard W.; Ghorbani, Kamran; Nicholson, Kelvin J.

doi:10.1109/tap.2017.2708122

Cited by 22 publications

(16 citation statements)

References 22 publications

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“…Measured patterns were not acquired because the antenna was not matched to the anechoic chamber’s 50-Ω source. Furthermore, it was demonstrated in [30] that the realized gain patterns of a 50-Ω version of this Huygens dipole antenna were in very good agreement with their simulated values.…”

Section: Electrically Small Omnidirectional Wpt-driven Light and Tmentioning

confidence: 52%

Wirelessly Powered Light and Temperature Sensors Facilitated by Electrically Small Omnidirectional and Huygens Dipole Antennas

Lin

Ziolkowski

2019

Sensors

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Wirelessly powered, very compact sensors are highly attractive for many emerging Internet-of-things (IoT) applications; they eliminate the need for on-board short-life and bulky batteries. In this study, two electrically small rectenna-based wirelessly powered light and temperature sensors were developed that operate at 915 MHz in the 902–928-MHz industrial, scientific, and medical (ISM) bands. First, a metamaterial-inspired near-field resonant parasitic (NFRP) Egyptian axe dipole (EAD) antenna was seamlessly integrated with a highly efficient sensor-augmented rectifier without any matching network. It was electrically small and very thin, and its omnidirectional property was ideal for capturing incident AC wireless power from any azimuthal direction and converting it into DC power. Both a photocell as the light sensor and a thermistor as the temperature sensor were demonstrated. The resistive properties of the photocell and thermistor changed the rectifier’s output voltage level; an acoustic alarm was activated once a threshold value was attained. Second, an electrically small, low-profile NFRP Huygens antenna was similarly integrated with the same light- and temperature-sensor-augmented rectifiers. Their unidirectional nature was very suitable for surface-mounted wireless power transfer (WPT) applications (i.e., on-body and on-wall sensors). Measurements of the prototypes of both the light- and temperature-sensor-augmented omni- and unidirectional rectenna systems confirmed their predicted performance characteristics.

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Section: Electrically Small Omnidirectional Wpt-driven Light and Tmentioning

confidence: 52%

Wirelessly Powered Light and Temperature Sensors Facilitated by Electrically Small Omnidirectional and Huygens Dipole Antennas

Lin

Ziolkowski

2019

Sensors

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“…These materials are fully compatible with existing aerospace composite tooling and manufacturing best practices. Therefore the HIS may potentially be prepared as a pre-preg for later use in a structural load-bearing smart skin application [30]- [32]. The simulated results are presented in Fig.…”

Section: His Designmentioning

confidence: 99%

Tomographic Characterization of a Multifunctional Composite High-Impedance Surface

Nicholson

Baum

Ziolkowski

et al. 2018

IEEE Trans. Microwave Theory Techn.

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The performance of a multi-functional composite high impedance surface (HIS) has been evaluated using the coherent Doppler tomography (CDT) and finite impulse response (FIR) filtering techniques. The HIS was fabricated using a combination of embroidery and advanced laser manufacturing processes. The result is a new conformable multi-functional glass fiber re-enforced polymer (GFRP) substrate suitable for structural load-bearing smart skin applications. The CDT method was utilized because it enabled the generation of a high resolution tomographic map of the HIS reflectivity. Tomograms generated at high incidence angles (> 80° from normal) were used to localize and FIR filter unwanted scattering associated with the ground plane edges and HIS transition regions. The resulting scattered fields from a defect (metallic block positioned in the center of the tomogram) were then used to assess the surface wave absorption within the HIS. Measured and simulated results are in excellent agreement.

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“…However, non-wovens together with one of the previously presented techniques, can lead to the design of textile RF circuits or antennas. Different materials can be employed as both conductive [27]- [31] or dielectric [32] nonwoven fabrics. As advantages, non-wovens provide higher levels of uniformity and consistency to high temperatures.…”

Section: Introductionmentioning

confidence: 99%

From Threads to Smart Textile: Parametric Characterization and Electromagnetic Analysis of Woven Structures

et al. 2019

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This paper presents a complete and enhanced description of a parametric characterization and an electromagnetic analysis technique in order to simulate complex woven structures for the design of wearable microwave circuits and antennas based on smart textile. On the one hand, the parametric characterization consists of achieving the mathematical models which describe the different patterns conformed by the threads of the woven structures. This characterization takes into account the possible deformations of the materials inside the woven structure. On the other hand, the electromagnetic analysis technique consists of studying the conductive or dielectric parameters which describe the materials from which the threads have been extruded, and predicting the electromagnetic behavior of whole woven structures using the already explained parametric characterization. For this purpose, three different, although electromagnetically equivalent, models of the involved materials are needed, which subsequently reduce the computational resources required in the simulations. As a result, the woven structures can be characterized from the involved threads and the electromagnetic behavior can be analyzed in order to design wearable antennas or circuits.

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Investigations of a Load-Bearing Composite Electrically Small Egyptian Axe Dipole Antenna

Cited by 22 publications

References 22 publications

Wirelessly Powered Light and Temperature Sensors Facilitated by Electrically Small Omnidirectional and Huygens Dipole Antennas

Wirelessly Powered Light and Temperature Sensors Facilitated by Electrically Small Omnidirectional and Huygens Dipole Antennas

Tomographic Characterization of a Multifunctional Composite High-Impedance Surface

From Threads to Smart Textile: Parametric Characterization and Electromagnetic Analysis of Woven Structures

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