15 GHz quadrature voltage controlled oscillator in 130 nm CMOS technology

This paper reports a 15 GHz quadrature voltage controlled oscillator (QVCO) designed in a 130 nm CMOS technology. The phase noise performance of the QVCO and of a phase locked loop (PLL) where the QVCO was inserted were compared with the literature and with telecom standards and commercial products for broadcast satellite applications

A 12GHz 30mW 130nm CMOS Rotary Travelling Wave Voltage Controlled Oscillator

This paper reports a 12GHz Rotary Travelling Wave (RTW) Voltage Controlled Oscillator designed in a 130nm CMOS technology. The phase noise and power consumption performances were compared with the literature and with telecommunication standards for broadcast satellite applications. The RTW VCO exhibits a -106dBc/Hz@1MHz and a 30mW power consumption with a sensibility of 400 MHz/V. Finally, requirements are given for a PLL implementation of the RTW VCO and simulated results are presented

Aliasing phenomenon due to CCD sensors

This article deals with the aliasing phenomenon due to CCD sensors . Those detectors inherently carry out a sampling and a low pass filtering process . We propose a superresolution technique reducing aliasing, and allowing a deconvolution over an extended spectral support to diminish the low pass filtering of CCD cells . This method improves the two restricting factors (low pass filtering and perturbation of low frequencies by folded high frequencies) inherent to this type of detector .Nous montrons dans cet article l'importance du repliement spectral lié à l'utilisation des détecteurs constitués de cellules CCD . Pour cela nous rappelons l'effet sur son spectre de l'échantillonnage et du lissage d'un signal ; ce sont les deux particularités de ces capteurs . Nous proposons une méthode de superrésolution qui réduit l'effet du repliement spectral, et qui permet de déconvoluer le signal sur un support spectral plus étendu afin de diminuer l'effet de lissage des cellules CCD . La méthode proposée permet donc d'améliorer les deux facteurs limitatifs (filtrage passe bas et perturbation de ces basses fréquences par les hautes fréquences) liés à la nature même de ce type de détecteur

Ball grid array-module with integrated shaped lens for WiGig applications in eyewear devices

A ball grid array-module (BGA-module) incorporating a low-cost shaped dielectric lens is proposed for wireless communications in the 60-GHz WiGig band between a smart eye-wear, where it is integrated and facing a laptop or TV. The module, which is codesigned with a 60-GHz transceiver, consists of two separate identical antennas for transmitting (Tx) and receiving (Rx). The in-plane separation of these elements is 6.9 mm both being offset from the lens focus. This poses a challenge to the lens design to ensure coincident beam pointing directions for Rx and Tx. The shaped lens is further required to narrow the angular coverage in the elevation plane and broaden it in the horizontal plane. A 3-D-printed eyewear frame with an integrated lens and a recess for proper BGA-module integration is fabricated in ABS-plastic material. Measurements show a reflection coefficient below -12 dB in the 57-66 GHz band. A maximum gain of 11 dBi is obtained at 60 GHz, with 24 degrees and 96 degrees beamwidth at 5-dBi gain, respectively, in the vertical and horizontal planes. The radiation exposure is evaluated for a homogeneous SAM head phantom and a heterogeneous visible human head. The simulated power density values for both models are found to be lower than the existing standards

The Preparation of the Cryomagnets and the Assembly of the LHC Test String 2

The numerous complex activities required to prepare the cryomagnets for the installation in String 2 are described. These include the configuration of the mechanical interfaces, thee conditioning of the beam tubes, the installation of beam screens and the instrumentation as well as the final checks. The preparation of the cryomagnets for String 2 has been a dress rehearsal for the preparation that the cryomagnets will undergo before their installation in the tunnel. After a description of the interconnection procedures of the components for String 2, the tests carried-out to release the String for operation are described. A brief account of the lessons learnt is also given

A space-efficient coupling element antenna for WWAN applications

International audienc

Réseaux de Capteurs Intelligents RECAIN2

National audienc

Reconfiguration dynamique d'une antenne

International audienc

Réseaux de Capteurs Intelligents RECAIN2

National audienc

A behavioural opto-electro-thermal VCSEL model for simulation of optical links

International audienc