Diseño de un nuevo módulo posterior para el experimento Quijote (fase II)

Abstract

This contribution presents the design of different subsystems developed for the back-end module under construction for the QUIJOTE project phase II. This module is divided into two blocks: one including the RF-gain and filtering stages, and the other with the correlation and detection components. This solution enables independent development and testing which facilitates the design process. Specifically, this document shows an ultra-wideband microstrip attenuator which can be easily modified to vary its attenuation value, a broadband E-plane waveguide power-splitter with excellent performance, two different waveguide architectures for achieving 90º phase shift covering the project bandwidth (26 – 36 GHz), and a video amplifier with adjustable gain that keeps the 1/f noise below limits. The designed back-end module provides improved flexibility regarding last-time modifications that may appear during the project assembly stage.