Title :
The Ka-band receiver for the QUIJOTE experiment
Author :
Cano, Juan L. ; Villa, Enrique ; Aja, Beatriz ; de la Fuente, L. ; Artal, Eduardo ; Watson, Robert ; Blackhurst, Edward ; Edgley, John ; Baines, Colin
Author_Institution :
Dept. Ing. de Comun., Univ. de Cantabria, Santander, Spain
Abstract :
The 26-36 GHz receiver for a radio astronomy radiometer, to characterize the polarization of the Cosmic Microwave Background, is presented. This receiver is based on very low noise cryogenically cooled amplifiers in the front-end module, while in the back-end module a broadband amplification and direct detection chain is operated at room temperature. Noise temperature of the low-noise amplifier (LNA) is 19 K when cooled at 18 K. Experimental results show a good sensitivity of the complete receiver with an effective bandwidth around 8 GHz. Moreover, output detected voltages agree with estimated values.
Keywords :
cryogenic electronics; low noise amplifiers; microwave amplifiers; microwave receivers; millimetre wave amplifiers; millimetre wave receivers; radioastronomy; radiometers; Ka-band receiver; QUIJOTE experiment; back-end module; broadband amplification; cosmic microwave background; cryogenically cooled amplifiers; frequency 26 GHz to 36 GHz; front-end module; low noise amplifiers; radio astronomy radiometer; temperature 18 K; temperature 19 K; temperature 293 K to 298 K; Finite element methods; Gain; Microwave radiometry; Noise; Radio frequency; Receivers; Sensitivity; HEMT; InP; cryogenic amplifiers; radio astronomy; radiometer; radiometry; very low noise receivers;
Conference_Titel :
Microwave Integrated Circuits Conference (EuMIC), 2011 European
Conference_Location :
Manchester
Print_ISBN :
978-1-61284-236-3
