We observed an anomaly in the human electroencephalogram (EEG) associated with exposure to terrestrial trunked radio (TETRA) Radiofrequency Fields (RF). Here, we characterize the time and frequency components of the anomaly and demonstrate that it is an artefact caused by TETRA RF interfering with the EEG recording equipment and not by any direct or indirect effect on the brain.

We demonstrate a stable and linear photonic radio frequency (RF) phase shifter based on a differential-group-delay element and the polarization sensitive effect of an optical phase modulator. The phase shift can be tuned continuously over 360 degrees for RF signals over 40GHz with an electrical control voltage from -7.5 to +7.5V.

Linearity is an important measure of an analog amplifier performance and normally measured by the 3rd order inter-modulation product (IP3) under a two-tone test. In this paper, we propose a test scheme that generates test tones using a built-in direct-digital synthesizer (DDS). Radio Frequency (RF) test tones are generated by converting the DDS output to RF using a built-in analog mixer that ca...

Making an accurate Radio Frequency, RF, design of any accelerating structure is fundamental to ensure that electromagnetic and beam dynamics requirements will be achieved. This is essential for the most complicated accelerating structures like the Drift Tube Linac, DTL; in this case a meticulous design facilitates the RF commissioning too. In this paper the influence of the interfaces and of th...

Localization using the characteristics of the Radio Frequency (RF) in wireless sensor networks is attractive because the method does not require additional measuring devices, and hence satisfies low cost and low power consumption needs. The range information derived from Received Signal Strength (RSS), which attenuates over the distance and node connectivity, is, however, inaccurate and unpredi...

Time-multiplexed optical line-by-line pulse shaping with specific application to rapid update radio-frequency (RF) waveform generation is modeled. The effects of fundamental pulse shaping parameters on generated RF waveforms are numerically analyzed. Experimental and theoretical results are compared and are in excellent agreement.

The SPEAR 2 radio frequency (RF) system uses cavities with minimal external damping, no circulators, and long uncovered waveguide runs. Because of these factors, the strengths and frequencies of the RF system impedances are dependent on such environmental factors as temperature and pressure. These effects are quantified; system modifications to control these effects and therefore improve beam s...

In this paper, we overview a set of desiderata for building anti-counterfeiting technologies that rely upon the difficulty of manufacturing randomized complex 3D objects. Then, we observe how this set is addressed by RF-DNA, an anti-counterfeiting technology recently proposed by DeJean and Kirovski. RF-DNA constructs certificates of authenticity as random objects that exhibit substantial unique...

For the first time, we demonstrate data transmission over a radio frequency (RF) fiber-optic link using a LiNbO3 microdisk configured to modulate an optical carrier. Initial experimental results demonstrate high-quality data transmission up to 100 Mb/s on a 8.7 GHz RF carrier. 2002 Elsevier Science Ltd. All rights reserved.