Publications related to Crystal radio

Spike-Based Sensing and Communication for Highly Energy-Efficient Sensor Edge Nodes

Highly energy-efficient wireless sensor nodes are a prerequisite for a sustainable operation of the Internet of things. Therefore, classical approaches for system design based on digital signal processing are not a viable solution, but system design has to ...

IEEE2022

Electrical Spectroscopy of Defect States in Synthetic 2D Materials

Yanfei Zhao

Two-dimensional (2D) materials such as graphene and transition metal dichalcogenide (TMDC) are considered as one of the most promising material platforms for future electronic devices, due to their ultra-thin thickness and fascinating electrical and optica ...

EPFL2022

Crystal-Size-Induced Band Gap Tuning in Perovskite Films

Michael Graetzel, Wolfgang Richard Tress, Amita Ummadisingu, Simone Meloni

A comprehensive picture explaining the effect of the crystal size in metal halide perovskite films on their opto-electronic characteristics is currently lacking. We report that perovskite nanocrystallites exhibit a wider band gap due to concurrent quantum ...

Wiley-VCH Verlag GmbH2021

Classic Electrically Small Antennas Versus in/On-Body Antennas: Similarities and Differences

Anja Skrivervik

Electrically small antennas (ESAs) have been discussed since the early radio days, when all antennas were small compared to the wavelength. The boom of mobile phones triggered a second wave of intense research activity on these devices, which continues tod ...

The European Associationa onAntennas and Propagation (EurAAP)2019

Broadband Zero-Bias RF Field-Effect Rectifiers Based on AlGaN/GaN Nanowires

Elison de Nazareth Matioli, Giovanni Santoruvo, Mohammad Samizadeh Nikooytabalvandani

Microwave zero-bias rectifiers are fast devices capable of rectifying RF signals without applied bias, which have applications ranging from RF power detection to THz imaging systems. Here we present gated nanowire field-effect rectifiers (NW-FERs) fabricat ...

2019

Spatial and Morphological Control of Cyanine Dye Thin Films

Nicolas Alexandre Serge Leclaire

Cyanine dyes are organic semiconductor compounds with light absorption and emission properties useful for emerging technologies such as solar cells and light-emitting devices. The characteristics of these materials in the solid state depend on their organi ...

EPFL2018

High Performance, Continuously Tunable Microwave Filters Using MEMS Devices With Very Large, Controlled, Out-of-Plane Actuation

Matthias Imboden

Software defined radios (SDR) in the microwave X- and K-bands offer the promise of low cost, programmable operation with real-time frequency agility. However, the real world in which such radios operate requires them to be able to detect nanowatt signals i ...

Institute of Electrical and Electronics Engineers2018

Optically isolated millimeter-wave detector for the Toroidal Plasma Experiment

Timothy Goodman, Stefano Alberti, Anja Skrivervik, Ivo Furno, Marcelo Baquero Ruiz, Oulfa Chellaï, Gennady Plyushchev, Fabian Manke

We have designed and built an optically isolated millimeter-wave detection system to prevent interference from a nearby, powerful, 2.45 GHz microwave source in millimeter-wave propagation experiments in the TORoroidal Plasma EXperiment (TORPEX). A series o ...

2018

Beamforming-deconvolution: A novel concept of deconvolution for ultrasound imaging

Jean-Philippe Thiran, Yves Wiaux, Adrien Georges Jean Besson

In ultrasound (US) imaging, beamforming is usually separated from the deconvolution or some other post-processing techniques. The former processes raw data to build radio-frequency (RF) images while the latter restore high-resolution images, denoted as tis ...

2017

FM-UWB: Towards a Robust, Low-Power Radio for Body Area Networks

Christian Enz, John Farserotu, Vladimir Kopta

The Frequency Modulated Ultra-Wideband (FM-UWB) is known as a low-power, low-complexity modulation scheme targeting low to moderate data rates in applications such as wireless body area networks. In this paper, a thorough review of all FM-UWB receivers and ...

2017

Energy saving glazing with a wide band-pass FSS allowing mobile communication: up-scaling and characterisation

Andreas Schueler, Olivia Valérie Charlotte Bouvard, Luc Burnier

A real case study and characterisation of modern energy efficient windows allowing mobile communication is presented. An earlier study had shown that laser scribing of energy saving coatings allows highly reducing the microwave attenuation (from 30 to 1-3d ...

Inst Engineering Technology-Iet2017

Modulation, Coding, and Receiver Design for Gigabit mmWave Communication

Nicholas Alexander Preyss

While wireless communication has become an ubiquitous part of our daily life and the world around us, it has not been able yet to deliver the multi-gigabit throughput required for applications like high-definition video transmission or cellular backhaul co ...

EPFL2016

Crystallization of undercooled liquid fenofibrate

Esther Amstad

Formulation of hydrophobic drugs as amorphous materials is highly advantageous as this increases their solubility in water and therefore their bioavailability. However, many drugs have a high propensity to crystallize during production and storage, limitin ...

Royal Society of Chemistry2015

Horn Antennas and Dual-Polarized Circuits in Substrate Integrated Waveguide (SIW) Technology

Marc Esquius Morote

The Substrate Integrated Waveguide (SIW) technology is a very promising candidate to provide widespread commercial solutions for modern communications systems. Its main advantage is the possibility to integrate passive/active components and antennas in the ...

EPFL2014

Cation-Induced Band-Gap Tuning in Organohalide Perovskites: Interplay of Spin-Orbit Coupling and Octahedra Tilting

Michael Graetzel, Mohammad Khaja Nazeeruddin, Filippo de Angelis, Paolo Umari

Organohalide lead perovskites have revolutionized the scenario of emerging photovoltaic technologies. The prototype MAPbI(3) perovskite (MA = CH3NH3+) has dominated the field, despite only harvesting photons above 750 nm (similar to 1.6 eV). Intensive rese ...

American Chemical Society2014

Monte Carlo Modeling of Crystal Channeling at High Energies

Philippe Jean Schoofs

Charged particles entering a crystal close to some preferred direction can be trapped in the electromagnetic potential well existing between consecutive planes or strings of atoms. This channeling effect can be used to extract beam particles if the crystal ...

EPFL2014

Time-domain performance of a patch-loaded band-reject UWB antenna

Anja Skrivervik, Nuno Miguel Faria Pires, Mohsen Koohestani

A previous study of a novel technique to design a band-reject UWB monopole antenna by using patch loading is extended. Frequency-domain measurements have confirmed that the antenna designed using this technique rejects the interfering signal at the two int ...

Institution of Engineering and Technology2013

Detection sensitivity and light collection studies of an APD-based high packing-fraction LYSO:Ce matrix for PET applications

Joao Varela

The ClearPEM is a dedicated APD-based PET detector for high-resolution breast cancer imaging. The detector module is composed of 12 LYSO:Ce crystal matrices, each with 4 x 8 individual crystals (2 x 2 x 20 mm(3)) optically coupled on both ends to S8550 Ham ...

Elsevier Science Bv2013

An innovative band-to-band tunneling analytical model and implications in compact modeling of tunneling-based devices

Mihai Adrian Ionescu, Luca De Michielis, Livio Lattanzio, Arnab Biswas, Nilay Dagtekin, Luca Selmi, Heike Riel

In this paper, an analytical band-to-band tunneling model is proposed, validated by means of drift-diffusion simulation and comparison with experimental data, implemented in Verilog-A, and finally proven with SPICE simulator through simulation of circuits ...

American Institute of Physics2013

On thermal and radiation damage to silicon crystals in the LHC proton beam

Philippe Jean Schoofs

We investigate thermal and radiation effects in silicon crystals which can be used for extracting beam halo particles in high energy accelerators. Application of bent crystals for removing halo is considered as a promising technique to enhance the beam col ...

Elsevier2013