A finger-shaped tactile sensor that uses an optical waveguide to detect the contact location and the surface normal of the contacted object has been developed. The hemispherical optical waveguide is covered with an elastic cover, and LEDs are installed for the light source on the edge of the waveguide. A fiber optics plate (FOP), consisting of high-density bundled optical fibers and a position ...

We propose the design and testing of a 2-D Fabry-Perot structure based on multilayer (ML) slab arrangement fed by circular array simple sources. Such class planar leaky-wave (LW) antenna can be made low-loss commercial laminates, it is bounded top subwavelength partially reflecting surface. The designed to suppress undesired radiation from quasi-TEM mode while leaking power excitation fast TM1 ...

In this paper, an endfire dual-polarized phased array is introduced for 5G mobile applications, which operates from 26 GHz to 30 with low profile of only 1.1 mm ( ${\bf 0.1\lambda _0}$ at GHz) and small clearance 3.5 mm. The consists in...

Extracting the light trapped in a waveguide, or the opposite effect of trapping light in a thin region and guiding it perpendicular to its incident propagation direction, is essential for optimal energetic performance in illumination, display or light harvesting devices. Here we demonstrate that the paradoxical goal of letting as much light in or out while maintaining the wave effectively trapp...

This article reports the development of a novel embedded acoustic waveguide sensor concept for monitoring the curing process and online health of composite structures. A sleevedwaveguide embedded in the composite is proposed to confine guidedwaves in one dimension, with leakage to the surroundingmedia only through specially created openings, thus enhancing the capability to inspect large struct...

We present the design, integration, and first cryogenic testing of our new broad-band millimeter-wave spectrometer, ZSpec. Z-Spec uses a novel architecture called WaFIRS (Waveguide Far-IR Spectrometer), which employs a curved diffraction grating in a parallel-plate waveguide propagation medium. The instrument will provide a resolving power between 200 and 350 across an instantaneous bandwidth o...

Waveguide windows are known to be major components of transmission lines used with highpressure or vacuum applicators, particle accelerators, and microwave plasma devices [1-5]. The function of the window is to provide vacuum/gas isolation of the source from the cavity while transmitting microwaves with minimum attenuation. It essentially consists of a dielectric plate surrounded by a metal fra...