High-efficiency, wideband GRIN lenses with intrinsically matched unit cells

NC Garcia, JD Chisum - IEEE Transactions on Antennas and …, 2020 - ieeexplore.ieee.org
We present an automated design procedure for the rapid realization of wideband millimeter-
wave lens antennas. The design method is based upon the creation of a library of matched …

The systematic design of noncommensurate impedance matching tapers for ultrawideband gradient-index lens antennas

W Wang, NC Garcia, JD Chisum - IEEE Transactions on …, 2021 - ieeexplore.ieee.org
We propose a general method for designing wideband matching tapers in inhomogeneous
media where phase velocity is coupled to the taper impedance profile. Such tapers are used …

Reduced dimensionality optimizer for efficient design of wideband millimeter‐wave 3D metamaterial GRIN lenses

N Garcia, J Chisum - Microwave and Optical Technology …, 2021 - Wiley Online Library
In this article we present a method for the rapid design of wideband, high efficiency
metamaterial GRIN lenses with rotational symmetry. The method achieves rapid optimization …

A compact, wide field-of-view gradient-index lens antenna for millimeter-wave mimo on mobile devices

W Bai, J Chisum - 2017 IEEE 86th Vehicular Technology …, 2017 - ieeexplore.ieee.org
Lens-based beam-forming antennas offer a low-power, low-cost alternative to hybrid
beamforming antenna arrays. They are ideally suited to millimeter-wave massive MIMO …

Dynamically Reconfigurable Microwave Circuits Leveraging Abrupt Phase-Change Material

DA Connelly, JD Chisum - IEEE Transactions on Microwave …, 2020 - ieeexplore.ieee.org
This article proposes a concept for dynamically reconfigurable distributed microwave circuits
by leveraging the abrupt conductivity transition in phase-change materials (PCMs). Metallic …

[图书][B] High-efficiency, Wideband Beam-scanning GRIN Lenses For Millimeter Wave Communications

NC Garcia - 2022 - search.proquest.com
Abstract Millimeter wave (MMW) GRadient INdex (GRIN) lens antennas leverage spatially
varying refractive structures to generate high directivity beams. GRIN lenses also …

High contrast gradient index lens antennas

J Chisum, N Garcia - US Patent 11,181,668, 2021 - Google Patents
A film comprising a first plurality of voids is provided, wherein respective ones of the first
plurality of voids have a regular n-gon geometry, and the first plurality of voids are arranged …