R. Malmqvist
Swedish Defence Research Agency, Sweden
M. Alfredson
Swedish Defence Research Agency, Sweden
C. Samuelsson
Swedish Defence Research Agency, Sweden
T. Nilsson
Swedish Defence Research Agency, Sweden
I. Ferrer
Swedish Defence Research Agency, Sweden
A. Gustafsson
Swedish Defence Research Agency, Sweden
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Published in: GigaHertz 2003. Proceedings from the Seventh Symposium
Linköping Electronic Conference Proceedings 8:7, p.
Published: 2003-11-06
ISBN:
ISSN: 1650-3686 (print), 1650-3740 (online)
In this paper; we evaluate a new design of a previously presented agile single-chip receiver front-end intended for a digital beamforming X-band smart skin array antenna. Firstly; by using a two-stage low noise amplifier in each filter section of the tunable active filter used in the front-end; a igher filter gain and selectivity as well as a lower filter noise figure can be achieved at the expense of a smaller filter tuning range. Secondly; the 1GHz-IF double balanced mixer also utilized in the front-end has been re-optimized to achieve higher image rejection and lower conversion loss. As a result of the filter and mixer RF performance improvements achieved the re-designed front-end can exhibit at least 50-85dB of image rejection; up to 13dB of conversion gain; a 6.4dB minimum value noise figure and 60-65dB of spurious-free dynamic range over the 7.6-8.6GHz agile receiver bandwidth; respectively.
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