Ultrawideband Low-Noise Amplifier Design for 3.1-4.8 GHz
2005 (English)In: Proceedings of GigaHertz 2005, Uppsala: GigaHertz 2005 , 2005, 291-194 p.Conference paper (Refereed)
An ultra-wideband (UWB) 3.1-4.8 GHz low-noise amplifier (LNA) employing two-section reactive input and output matching networks is presented in this paper. The amplifier is optimized for the minimum noise figure over the entire bandwidth and for maximum flat power gain. lf implemented in a narrowband system, the LNA can be matched for the optimal noise figure using simple one-section reactive input and output matching networks. However, if a wideband operation is required, the issue must be solved with other techniques. It is shown that with appropriate broadband matching techniques, Bands Group 1 ultra-wideband typical specifications can be achieved using a 5.25 GHz LNA. As a first step the design methodology focuses on noise figure optimization and continues with the optimization of the power gain. The nonidealities of the broadband matching networks implemented with microstrips are analyzed and their effects on the LNA performances are presented. The printed circuit board (PCB) manufacture process variations are included in the simulation setup. The substrate used is a double layer PCB with the Rogers material RO43508. The simulated LNA using microstrip matching networks achieved a noise figure smaller than 2.3 dB over the entire band and a flat power gain of 15.8 ± 0.14 dB.
Place, publisher, year, edition, pages
Uppsala: GigaHertz 2005 , 2005. 291-194 p.
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-32377Local ID: 18275OAI: oai:DiVA.org:liu-32377DiVA: diva2:253199
Gigahertz 2005, Uppsala, Sweden. Nov, 2005.