We have simulated and measured the beam properties of lens-antenna coupled hot electron bolometer mixers at a few supra-terahertz frequencies between 1.4 5.3 THz. The quasi-optical structures consist an elliptical lens logarithmic spiral antenna. model used for our simulations consists finite-element analysis to simulate far-field radiation pattern antenna, geometrical optics map antenna surfac...

We continue here our investigation of Solid Dielectric Lens Impulse Radiating Antennas (SDL IRAs), which are intended for Ultra-Wideband, high-voltage radiation from the front end of an electrically conducting cylindrical shroud. This device is intended to radiate the highest possible field from the smallest possible aperture using the highest possible source voltage. Furthermore, this antenna ...

Millimeter wave (mmWave) communication by utilizing lens antenna arrays is a promising technique for realizing cost-effective 5G wireless systems with large MIMO (multiple-input multiple-output) but only limited radio frequency (RF) chains. This paper studies an uplink multi-user mmWave single-sided lens MIMO system, where only the base station (BS) is equipped with a full-dimensional (FD) lens...

A fully integrated planar sensor for 77 GHz automotive applications is presented. The frontend consists of a transceiver multichip module and an electronically steerable microstrip patch array. The antenna feed network is based on a modified Rotman-lens and connected to the array in a multilayer approach offering higher integration. Furthermore, the frontend comprises a phase lock loop to allow...

Metamaterials and Transformation Optics (TO) have been used to design and implement many novel electromagnetic devices that can achieve effects not possible using conventional materials. Compact high-gain antennas are one of the more popular and successful emerging applications for the new TO and metamaterial design approaches. This dissertation details an extension of uniaxial near-zeroindex m...

Hossein Abouee-Mehrizi Joseph L. Rotman School of Management, University of Toronto, Toronto, M5S 3E6, CANADA, [email protected] Barış Balcıog̃lu Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, ON M5S 3G8, CANADA, [email protected] Opher Baron Joseph L. Rotman School of Management, University of Toronto, Toronto, M5S 3E6, CANADA, Opher.Baron@R...

Antennas integrated with active circuitry are usually referred to as active antenna arrays. The integration can be done at different levels, depending on the goal and application. For example, a low-noise amplifier (LNA) is often integrated directly with the antenna for reduced loss and therefore decreased noise figure. Another example is the integration of power amplifiers with antenna arrays ...

Design and measurement results of a beam-steering integrated lens antenna at 77 GHz are presented. An 8-element LTCC aperture coupled patch antenna feed array with a switching network is used to electrically steer the main beam in H-plane. A 100-mm diameter Rexolite (εr = 2.53) lens is simulated and tested. The eccentricity of the lens is optimized in an earlier work with ray-tracing simulation...

At the expense of frequency narrowing, binary amplitude-only diffractive optical elements emulate refractive lenses without the need of large profiles. Unfortunately, they also present larger Fresnel reflection loss than conventional lenses. This is usually tackled by implementing unattractive cumbersome designs. Here we demonstrate that simplicity is not at odds with performance and we show ho...