Mode matching error signals using radio-frequency beam shape modulation

Modulation of radio frequency signals by ULF waves

The ionospheric plasma is continually perturbed by ultra-low frequency (ULF; 1–100 mHz) plasma waves that are incident from the magnetosphere. In this paper we present a combined experimental and modeling study of the variation in radio frequency of signals propagating in the ionosphere due to the interaction of ULF wave energy with the ionospheric plasma. Modeling the interaction shows that th...

Beam Patterns of Low Frequency Radio Antennas using LEO Satellites

Error control for radio frequency identification

This work proposes to use Forward Error Correction (FEC) for the tag-to-reader communication in long-range Radio Frequency Identification (RFID) systems, specifically in the widely used EPCglocal Class-1 Generation-2 (EPCc1g2) systems, to overcome some of the limitations that occur at extended communication distances. In a long-range RFID system, the reader must be able to identify a great numb...

Light beam positional modulation by gel rod dilatational mode

2014 An elastic dilatational mode at very low frequency (20-2 000 Hz) in a gel rod is used to deflect a laser beam in a simple and very low price set-up. A 15° deflection is observed at 140 Hz with a electrical power of 9 mW. Revue Phys. Appl. 15 (1980) 875-878 AVRIL 1980, Classification Physics Abstracts 07.60 42.80 81.20S .

Optimization and beam dynamics of a superconducting radio-frequency gun

Recent advances in superconducting radio-frequency (RF) technology and a better understanding of RF photoinjector design optimization make it possible to propose a specific design for a superconducting RF gun that can simultaneously produce both ultra-high peak brightness and high average current. Such a device is a critical component of next generation X-ray sources, such as self-amplified spo...