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Modeling of RF-design at board level for Assisted Global Positioning System (AGPS)
Linköping University, Department of Science and Technology. Linköping University, The Institute of Technology.
2007 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

This thesis describes the design of a 1575.42 MHz Low-Noise Amplifier (LNA) using a Hetero-Junction Field Effect Transistor (HJ-FET) from NEC. The LNA design focuses on a minimum noise figure and good power gain in order to improve receiver sensitivity. The first evaluation of the LNA module shows a good agreement between the simulated and measured results. However, the output matching section has some deviation from the reflection coefficient against the simulated results, which in turn led to a minor redesign of the output matching network. Touchstone parameters representing a via and a SubMiniature version A (SMA) connector were extracted from measurements using Matlab and verified in Microwave Office.

The LNA prototype has a measured gain of 15.54 dB, a noise figure of 0.80 dB. The receiver minimum detectable signal level with SAW-filter is decreased from -159.15 dBm using the Infineon BGA615L7E6327 Silicon Germanium GPS Low-Noise Amplifier to -159.40 dBm.

Place, publisher, year, edition, pages
2007. , 70 p.
National Category
Engineering and Technology
URN: urn:nbn:se:liu:diva-96340ISRN: LITH-ITN-ED-EX--07/020--SEOAI: diva2:645434
Subject / course
Electrical Engineering
Available from: 2013-09-04 Created: 2013-08-14 Last updated: 2013-09-04Bibliographically approved

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Paszowski, Michael
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