A5063222131- Antenna Design and Analysis
- Antenna Design and Optimization
- Energy Harvesting in Wireless Networks
- Wireless Power Transfer Systems
- Spacecraft Design and Technology
- solar cell performance optimization
- Indoor and Outdoor Localization Technologies
- Microwave Engineering and Waveguides
- Millimeter-Wave Propagation and Modeling
- Metamaterials and Metasurfaces Applications
- Energy Efficient Wireless Sensor Networks
- Satellite Communication Systems
- Radio Astronomy Observations and Technology
- Advanced Materials and Mechanics
- Semiconductor Lasers and Optical Devices
- Orbital Angular Momentum in Optics
- Random lasers and scattering media
- Structural Analysis and Optimization
- Space exploration and regulation
California Institute of Technology
2020-2024
Duke University
2019-2020
Plasmonics (United States)
2019-2020
This paper describes Caltech's Space Solar Power Demonstration One (SSPD-1) payload and upcoming mission on Momentus Vigoride 5. SSPD-1 is comprised of three experiments each which demonstrates the performance a key technology piece in space environment. We describe goals SSPD-1. The - Alba, DOLCE MAPLE are discussed. launch scheduled for November 6, 2022 X's Transporter 6 mission.
Sensing motion and distinguishing its source as human or nonhuman, with high precision, has tremendous applications in a variety of areas from health monitoring to energy efficiency. One strategy achieve this goal is detect the small breathing, which consistent indicator presence. Among many smart sensing schemes proposed, microwave RF sensors have shown great promise due their simplicity, privacy, effective range. In paper, we propose use dynamic metasurface antenna (DMAs) an alternative...
Shape-changing arrays are an emerging frontier of phased array development. These fold, conform, and flex dynamically as they operate. In this work we describe the technology developments which have enabled their creation use. We present theoretical implications aperture change for methods taking advantage these changes. discuss existing shape-changing components systems. Operation techniques arrays, including new results demonstrating a method determining shape asymmetrically bent flexible...
Flexible phased arrays potentially enable diverse applications not permitted by rigid systems; however, they introduce ambiguity in antenna element positions. If this position can be overcome, flexible perform the full suite of array functions: beam steering, wavefront engineering, and focusing. Furthermore, shape reconstructions used for beyond beamforming. We propose a framework to reconstruct that only uses mutual coupling measurements does require additional sensors or functionalities...
Lightweight, flexible phased arrays enable new applications by dynamically changing shape during deployment and operation. However, these changes must be tracked accounted for the element excitation in order array to continue proper We propose a framework reconstructing of using only measurements mutual coupling between antennas array. The is demonstrated passive 2.5 GHz fixed 8 different frames known radii convex concave curvature. Our results show ability reconstruct within ≈ 0.04λ...
Phased arrays have enabled advances in communications, sensing, imaging, and wireless power transfer. In all these applications, large apertures enable higher power, data rates, resolution, complex functionalities, but are elusive owing to a correspondingly cost, mass, physical size. Flexible phased (FPAs) show potential breaking this trade-off. Their thinness extremely low mass allow FPAs be folded, rolled, or otherwise compressed into smaller sizes, thus enabling new regimes of transport...
We demonstrate that dynamic metasurface apertures (DMAs) are capable of generating a multitude highly uncorrelated speckle patterns in typical residential environment at single frequency. use DMA implemented as an electrically-large cavity excited by port and loaded with many individually-addressable tunable metamaterial radiators. placed such one corner plywood-walled L-shape room transmitting microwave signals 19 GHz we changed the tuning states In another corner, non-line-of-sight DMA,...
Space solar power (SSP), envisioned for decades as a solution continuous, stable, and dynamically dispatchable clean energy, has seen tremendous interest number of experimental demonstrations in the last few years. A practical implementation been elusive to date, owing high launch costs associated with heavy, rigid photovoltaic (PV) wireless transfer (WPT) arrays. Lightweight flexible solutions WPT have demonstrated terrestrially but, not deployed tested space. In this paper, we present an...
<title>Abstract</title> This paper presents a distributed space solar power generation and transmission system that converts insolation into microwave beams it to Earth. system, composed of station large, close-flying modules residing in Geostationary Orbit, can form dynamically programmable focal points on Earth provide dispatchable demand. Modules are flexible phased array sheets hosting self-synchronizing network integrated circuits antennas which convert DC from photovoltaic cells...
Large apertures in space are critical for high-power and high-bandwidth applications spanning wireless power transfer (WPT) communication, however progress on this front is stunted by the geometric limitations of rocket flight. Here, we present a light flexible 10GHz array, which composed dipole antennas co-cured to glass-fiber composite. The arrays designed dynamically conform new shapes be enough fold completely flat, coil, pop back up upon deployment. design was chosen amenable scalable,...
We present a ray-tracing analysis of smart motion detector based on dynamically reconfigurable metasurface antenna (DMA). A DMA consists an array metamaterial radiators excited by single-port waveguide or cavity. By incorporating simple switchable components into each element and addressing them individually, DMAs can generate myriad spatially distinct radiation patterns alter as function applied voltage. These have the potential to probe all regions room set rooms detect motion, even when...
Flexible, deployable phased arrays enable novel and diverse applications but necessitate similarly flexible radiators. Here we present a light 10GHz dipole antenna, which is co-cured to glass-fiber composite suited for arrays. The antennas are designed dynamically conform new array shapes be enough fold completely flat pop back up upon deployment. We employ pop-up with capacitive fingers feed impedance matching that highly robust against manufacturing errors. Upon deployment, the exhibit −10...