W. Hu

TL;DR: In this article, numerical simulations are used to study the electromagnetic scattering from phase agile microstrip reflectarray cells which exploit the voltage controlled dielectric anisotropy property of nematic state liquid crystals (LCs).

TL;DR: In this article, a frequency selective surface (FSS) which exploits the dielectric anisotropy of liquid crystals to generate an electronically tunable bandpass filter response at D Band (110-170 GHz) is presented.

TL;DR: In this article, an offset parabolic reflector antenna which employs a reflectarray sub-reflector to tilt the focused beam from the boresight direction at 94 GHz is described, and numerical simulations are employed to demonstrate that the high gain pattern of the antenna can be tilted to a predetermined angle by introducing a progressive phase shift across the aperture.

TL;DR: In this article, a printed reflectarray antenna, which generates a beam that can be electronically switched from a sum to a difference radiation pattern, is presented by applying a bias voltage of 20 V to one-half of the aperture, which is constructed above a 500 mum cavity containing liquid crystals.

TL;DR: In this article, the electrical properties of nematic state liquid crystal can be exploited to produce phase shifters for beam scanning printed reflectarray antennas with a tunable range greater than 180°.