Affiliation: Texas Tech University, USA
Title: Radio observations of the most relativistic cosmic bangs: from outflows to remnants
Abstract: The deaths of massive stars seed our universe with black holes and neutron stars – the most exotic objects of the stellar graveyard. The births of these stellar remnants, as well as their mergers when paired in binaries, power explosions that can launch the most relativistic jets we know of in the universe (gamma-ray bursts) and shake the very fabric of space-time via ripples called gravitational waves. In this talk I will discuss how radio light in particular, and gravitational waves, can be used in tandem to unveil the multi-messenger physics of relativistic cosmic transients. I will also highlight opportunities and challenges that lie in front of us, as improvements in detectors’ sensitivities will likely transform a trickle of multi-messenger discoveries into a flood.
Affiliation: Distinguished Professor and Lockheed Martin Endowed Chair, Electrical, Computer and Energy Engineering, University of Colorado, Boulder, USA
Title: WPT: from mW/cm2 harvesting to kW capacitive vehicle powering
Abstract: This talk will overview wireless power transfer for power levels from mW to kW. The ultra-low power density application is in far-field harvesting at GHz frequencies for unattended wireless sensors. In this case, efficiency and power management are challenging, as well as miniaturization and energy storage. Several examples will be shown, including harvesting sidelobes from a 4.3GHz altimeter radar antenna on a Boeing 737 aircraft for powering health-monitoring aircraft sensors. At the high power levels, near-field capacitive power transfer is chosen in the 6 MHz range for powering stationary vehicles and vehicles in motion. In this case, over 85% efficiency is achieved for 1kW of capacitive power transfer while meeting safety standards in the vicinity of the vehicle through a near-field phased array approach. Other approaches, such as power beaming and multi-mode shielded wireless powering will also be discussed.