Filter bank design for receiver back ends of satellite constellations
Weather forecasting using satellites has been of great interest, since climate change is a global threat. There is also a need to make sustainable designs and reduce power consumption, size etc. This thesis presents the receiver back-end design (IF Block) for faster weather forecasting in satellite...
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ftchalmersuniojs:oai:odr.chalmers.se:20.500.12380/305199 2023-07-30T04:01:25+02:00 Filter bank design for receiver back ends of satellite constellations Jakobsson, Måns Rajan, Amritha Chalmers tekniska högskola / Institutionen för mikroteknologi och nanovetenskap (MC2) Vassilev, Vessen Emrich, Anders Krus, Ulrika Kempe, Kalle 2022-07-13T04:10:27Z application/pdf https://hdl.handle.net/20.500.12380/305199 eng eng MCCX04 https://hdl.handle.net/20.500.12380/305199 weather forecasting isolator diplexer IF block amplifiers power consumption size Microwave Office Weather Cube Arctic Weather Satellite resistive dividers H 2022 ftchalmersuniojs https://doi.org/20.500.12380/305199 2023-07-08T19:55:51Z Weather forecasting using satellites has been of great interest, since climate change is a global threat. There is also a need to make sustainable designs and reduce power consumption, size etc. This thesis presents the receiver back-end design (IF Block) for faster weather forecasting in satellite constellations. The suggested prototype called Weather Cube, has been able to meet most of the design goals. The first step of this thesis, was reviewing the existing design of the Arctic Weather Satellite and identifying what could be changed. Certain methods to reduce the power consumption for the back-end of the Arctic Weather Satellite, while maintaining the system performance are presented. Amplifiers present in the RF Section were the main reason of power consumption. There are amplifiers present in each channel for both gain levelling and isolation. Initially, the number of amplifiers were reduced and attenuators were added for gain levelling, but that didn’t satisfy the isolation requirements. Different components were explored to test ideas. The final decisionn was to replace multiple amplifiers used for isolation in the system, with passive isolators. This reduces the power consumption significantly, while fulfilling the requirements for isolation. Bulky, coaxial components like diplexers are also replaced with a simpler system of a resistive divider and filters. The performance of a diplexer is better than this system, in terms of insertion loss and isolation but the resistive divider and high pass/low pass filters can be surface mounted. The insertion loss due to the resistive divider can be compensated for with more amplification in the system and isolation can be achieved with divider and filters combination. Transmission lines are also tuned to minimize reflections. There are certain trade-offs when design choices were considered, which are also a part of this report. All components were tested by designing individual PCBs, and the measurements were then simulated in Microwave Office. The transmission ... Other/Unknown Material Arctic Climate change Chalmers University of Technology: Chalmers Open Digital Repository (ODR) Arctic |
institution |
Open Polar |
collection |
Chalmers University of Technology: Chalmers Open Digital Repository (ODR) |
op_collection_id |
ftchalmersuniojs |
language |
English |
topic |
weather forecasting isolator diplexer IF block amplifiers power consumption size Microwave Office Weather Cube Arctic Weather Satellite resistive dividers |
spellingShingle |
weather forecasting isolator diplexer IF block amplifiers power consumption size Microwave Office Weather Cube Arctic Weather Satellite resistive dividers Jakobsson, Måns Rajan, Amritha Filter bank design for receiver back ends of satellite constellations |
topic_facet |
weather forecasting isolator diplexer IF block amplifiers power consumption size Microwave Office Weather Cube Arctic Weather Satellite resistive dividers |
description |
Weather forecasting using satellites has been of great interest, since climate change is a global threat. There is also a need to make sustainable designs and reduce power consumption, size etc. This thesis presents the receiver back-end design (IF Block) for faster weather forecasting in satellite constellations. The suggested prototype called Weather Cube, has been able to meet most of the design goals. The first step of this thesis, was reviewing the existing design of the Arctic Weather Satellite and identifying what could be changed. Certain methods to reduce the power consumption for the back-end of the Arctic Weather Satellite, while maintaining the system performance are presented. Amplifiers present in the RF Section were the main reason of power consumption. There are amplifiers present in each channel for both gain levelling and isolation. Initially, the number of amplifiers were reduced and attenuators were added for gain levelling, but that didn’t satisfy the isolation requirements. Different components were explored to test ideas. The final decisionn was to replace multiple amplifiers used for isolation in the system, with passive isolators. This reduces the power consumption significantly, while fulfilling the requirements for isolation. Bulky, coaxial components like diplexers are also replaced with a simpler system of a resistive divider and filters. The performance of a diplexer is better than this system, in terms of insertion loss and isolation but the resistive divider and high pass/low pass filters can be surface mounted. The insertion loss due to the resistive divider can be compensated for with more amplification in the system and isolation can be achieved with divider and filters combination. Transmission lines are also tuned to minimize reflections. There are certain trade-offs when design choices were considered, which are also a part of this report. All components were tested by designing individual PCBs, and the measurements were then simulated in Microwave Office. The transmission ... |
author2 |
Chalmers tekniska högskola / Institutionen för mikroteknologi och nanovetenskap (MC2) Vassilev, Vessen Emrich, Anders Krus, Ulrika Kempe, Kalle |
format |
Other/Unknown Material |
author |
Jakobsson, Måns Rajan, Amritha |
author_facet |
Jakobsson, Måns Rajan, Amritha |
author_sort |
Jakobsson, Måns |
title |
Filter bank design for receiver back ends of satellite constellations |
title_short |
Filter bank design for receiver back ends of satellite constellations |
title_full |
Filter bank design for receiver back ends of satellite constellations |
title_fullStr |
Filter bank design for receiver back ends of satellite constellations |
title_full_unstemmed |
Filter bank design for receiver back ends of satellite constellations |
title_sort |
filter bank design for receiver back ends of satellite constellations |
publishDate |
2022 |
url |
https://hdl.handle.net/20.500.12380/305199 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change |
genre_facet |
Arctic Climate change |
op_relation |
MCCX04 https://hdl.handle.net/20.500.12380/305199 |
op_doi |
https://doi.org/20.500.12380/305199 |
_version_ |
1772812151273029632 |