Abstract
This paper describes the analysis, design and characterization of a polarimetric receiver developed for covering the 35 to 47 GHz frequency band in the new instrument aimed at completing the ground-based Q-U-I Joint Tenerife Experiment. This experiment is designed to measure polarization in the Cosmic Microwave Background. The described high frequency instrument is a HEMT-based array composed of 29 pixels. A thorough analysis of the behaviour of the proposed receiver, based on electronic phase switching, is presented for a noise-like linearly polarized input signal, obtaining simultaneously I, Q and U Stokes parameters of the input signal. Wideband subsystems are designed, assembled and characterized for the polarimeter. Their performances are described showing appropriate results within the 35-to-47 GHz frequency band. Functionality tests are performed at room and cryogenic temperatures with adequate results for both temperature conditions, which validate the receiver concept and performance.
Highlights
INTRODUCTIONThe scientific community has devoted many resources to the study of the Cosmic Microwave Background (CMB) through the development of different experiments, such as the Cosmic Background Explorer (COBE) (Richards 2007), the Wilkinson Microwave Anisotropy Probe (WMAP) (Richards 2007) and the PLANCK mission (Aja et al 2005; Bersanelli et al 2010; Aghanim et al 2014)
The design of wideband and very sensitive receivers is of most importance to radio astronomers since they are key instruments for the study of the relic signals or radiations that help us to explain the origin of the Universe
The Q-U-I Joint Tenerife (QUIJOTE) experiment is aimed at characterizing the polarization of the Cosmic Microwave Background (CMB) and other galactic and extragalactic signals at medium and large angular scales in the frequency range from 10 to 47 GHz (Rubiño-Martin et al 2010; López-Caniego et al 2014)
Summary
The scientific community has devoted many resources to the study of the CMB through the development of different experiments, such as the Cosmic Background Explorer (COBE) (Richards 2007), the Wilkinson Microwave Anisotropy Probe (WMAP) (Richards 2007) and the PLANCK mission (Aja et al 2005; Bersanelli et al 2010; Aghanim et al 2014) Facing all these satellite experiments, there are many ground-based experiments (National Aeronautics and Space Administration 2017) which have complemented the data obtained from the three spacecraft and enabled to measure other significant CMB parameters.
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