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Next generation radio telescopes will have a very large number of antenna elements. For such systems, ultra-low-noise ambient-temperature integrated CMOS receivers can address some design challenges, such as size, weight, power consumption, and cost. This paper describes the development of one such receiver. Developed in 65-nm TSMC CMOS, it operates between 0.7 and 1.5 GHz and achieves minimum noise...
Phased-array feeds are being developed for expantion of the field-of-view of parabolic reflector antennas. The University of Calgary (UCalgary) and the National Research Council (NRC) of Canada have recently demonstrated a low-noise phased-array feed for possible use in the Square Kilometre Array radio telescope. NRC has made noise measurements of such an array equipped with CMOS low-noise amplifiers...
The University of Calgary and the National Research Council (NRC) of Canada are developing a low-noise ambient-temperature phased-array demonstrator for possible use in the Square Kilometer Array radio telescope. In December 2014, NRC made noise measurements of the Advanced Focal Array Demonstrator equipped with CMOS low noise amplifiers (LNAs) designed by the University of Calgary. The LNAs were...
In this work packaging options for very low noise amplifiers (VLNA) with a single on-chip output-choke inductor are investigated. For very low noise amplifiers package parasitics can add significant noise, degrading LNA performance. Flip-chip bonding is a newer approach to attaching integrated circuits onto printed circuit boards with reduced parasitics. In this work, it was found that choice of packaging...
Design and measurements of a room temperature 700 MHz - 1400 MHz low noise amplifier (LNA) in 90-nm bulk CMOS, intended for use in the Canadian large adaptive reflector (CLAR) radio telescope, are presented. The new bandwidth constrained LNA noise figure optimization and broad-banding technique as well as the importance of substrate shielding are discussed. The amplifier has 0.35 dB noise figure while...
Noise figure optimization techniques for an inductively-degenerated CMOS LNA with a lossy gate inductor are presented. The techniques allow for integration of the LNA directly with a non -50 Omega antenna thus removing the need for a lossy matching circuitry. The LNA noise temperature is shown to reduce by a factor of 1 when non-standard signal source resistance is used. The LNA analyzed in this paper...
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