Table of Contents
International Journal of Microwave Science and Technology
Volume 2013 (2013), Article ID 586158, 8 pages
http://dx.doi.org/10.1155/2013/586158
Research Article

Downconverting Module Architectures for High Performance Multipixel Cameras

Department of Electronic Engineering, University of Roma Tor Vergata, Roma 00133, Italy

Received 3 January 2013; Revised 17 March 2013; Accepted 18 March 2013

Academic Editor: Chang-Ho Lee

Copyright © 2013 Diego Palombini et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Multipixel cameras represent an emerging topology for arrays receivers, improving speed and accuracy of both security scanning systems and radioastronomical sky surveys by means of a matrix of phased elements. Difficulties in the generation and proper distribution to each pixel of the local oscillator signal still limit their use to frequency ranges below a few GHz or at least seriously affect the complexity of the implementable cameras. This work presents a full comparison between two possible system architectures, alternatively based on LO frequency multiplication or subharmonic mixing strategies, aiming to overcome the aforesaid limitations: design and performance of two compact test vehicles in MMIC technology, both operating in the Q-band frequency range with ultrabroadband IF section, are reported.