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Showing papers by "David Schurig published in 2020"


Proceedings ArticleDOI
21 Sep 2020
TL;DR: POWDER is a city-scale, remotely accessible, end-to-end software defined platform to support mobile and wireless research that provides advances in scale, realism, diversity, flexibility, and access.
Abstract: This paper provides an overview of the Platform for Open Wireless Data-driven Experimental Research (POWDER). POWDER is a city-scale, remotely accessible, end-to-end software defined platform to support mobile and wireless research. Compared to other mobile and wireless testbeds POWDER provides advances in scale, realism, diversity, flexibility, and access.

38 citations


Journal ArticleDOI
TL;DR: The design and analysis of omnidirectional retroreflective surfaces made of trihedral, corner reflectors to enhance the monostatic radar cross section of otherwise low back-scattering surfaces is presented.
Abstract: In this paper, we present the design and analysis of omnidirectional retroreflective surfaces made of trihedral, corner reflectors to enhance the monostatic radar cross section of otherwise low back-scattering surfaces. The proposed designs can be mounted on helmets and used for various applications such as improving the collision avoidance of automotive radar systems in the presence of bicyclists and motorcyclists or improving collision prediction radars in contact sports or other risky environments, where helmets are used. To address these applications, we analyze the coherent response of the proposed designs.

4 citations


Journal ArticleDOI
30 Mar 2020
TL;DR: In this paper, two lines that guide the incident wave deeper into the body and concentrate it around their respective tips are used to provide constructive coupling and augments the focused field, which can be modified to focus fields with arbitrary polarizations at different depths inside the body.
Abstract: In this paper, we present a novel method of electromagnetic field focusing applicable to 3D implantable devices. Focusing is achieved using two lines that guide the incident wave deeper into the body and concentrate it around their respective tips. The small gap between the tips of the lines provides constructive coupling and augments the focused field. Compared to the case where no lines are used, the focused power is 8 times and 16 times larger if one line and two lines are utilized, respectively. The proposed design can be modified to focus fields with arbitrary polarizations at different depths inside the body. We propose a method to create this focusing structure by extrusion inside the body using heat-activated polymer-based conductors.

2 citations


Journal ArticleDOI
TL;DR: The generalized analytical phasing method provides rapid near-optimal phasing, enabling real-time beam steering with high-element-count, and dynamically configured arrays, and a reduced-order numerical phasing (RONP) method that converts an N-dimensional unknown parameter space to a 2-D space (the optimal beam polarization).
Abstract: We propose methods to determine beam-forming excitation phase profiles for arbitrarily oriented arrays of antennas and scatterers, made of arbitrarily polarized elements. Our generalized analytical phasing (GAP) method provides rapid near-optimal phasing, enabling real-time beam steering with high-element-count, and dynamically configured arrays. In addition, we propose a reduced-order numerical phasing (RONP) method that converts an N -dimensional unknown parameter space (the N unknown phases) to a 2-D space (the optimal beam polarization). Though not as fast as the GAP, this method introduces no reduction in phasing accuracy. Both methods are suitable for a wide range of antenna array and metasurface designs.

1 citations