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This paper presents differential microstrip lines with a wide rejection band for the common-mode, achieved by means of chirped-EBGs. The idea is to apply a sinusoidal chirped modulation of the even (common-mode) characteristic impedance, keeping the odd (differential-mode) characteristic impedance invariant and equal to the reference impedance of the ports (Z0). Thus, the even-mode characteristic...
Differential (or balanced) microstrip lines with common-mode suppression in a controllable frequency band are implemented by periodically modulating the common-mode characteristic impedance of the line, keeping the differential-mode impedance unaltered. Due to the Bragg effect associated to periodicity, the common-mode is efficiently rejected in the vicinity of the Bragg frequency, whereas the structure...
Reflectometry using Global Navigation Satellite System's signals of opportunity (GNSS-R) was originally conceived for mesoscale altimetry [1], although its applicability to sea state determination, soil moisture, vegetation, snow monitoring… has already been demonstrated. In December 2012 the Phase A studies of ESA's PAssive Reflectometry and Interferometry System In-orbit Demonstration (PARIS IoD)...
We report on a fast, nondestructive and sensitive measurement technique that uses atomic spin precession and non-destructive Faraday rotation probing to measure all three components of the magnetic field with kHz bandwidth. In contrast to other vector magnetometer techniques that modulate an applied magnetic field [1, 2, 3] we modulate the initial atomic polarization and extract the magnetic field...
Static and dynamic properties of InP-based Quantum Dashes of 1.55μm directly modulated lasers are reported. Using growth and design optimization, we demonstrate linewidth enhancement factor above threshold as low as 2 and decreasing with injected current. This unique chirp behavior leads to uncompensated and non-amplified SMF 10Gb/s transmissions at a constant bias current from back-to-back up to...
In this paper the most relevant applications derived from dispersion and impedance engineering in resonant type metamaterial transmission lines are highlighted. Essentially, this includes enhanced bandwidth components and dual-band components. Due to the small electrical size of the considered metamaterial resonators, size reduction is also obtained. We will provide some recent results obtained by...
In this paper, an exhaustive analysis of resonant type metamaterial transmission lines is carried out. Specifically, the effects of the dimensions and resonator characteristics on the frequency response are studied and interpreted to the light of the equivalent circuit model of the lines. This study is important for the application of these artificial lines to microwave circuit design, since important...
A modulation bandwidth up to 10 GHz in continuous wave mode operation is demonstrated using optimized 1.55 mum InAs/InP (100) quantum dashes based lasers.
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