Publication
Increasing energy efficiency of a phased array antenna transmitter
| Summary: | The telecommunications sector is currently transiting towards the fifth generation wireless networks. Such a transition comes with new challenges, in particular the growth of the number of connected devices. Having more devices consuming more bandwidth shall unavoidably increase the power consumption of wireless networks, and thus its carbon footprint, unless energy efficiency is increased. For this reason, this work aims to contribute to increasing the energy efficiency of highly directive and flexible antenna transmitters: phased array antennas. The strategies explored in this work focus on manipulating the radiated signals, which means that such signals are substantially different from the signal to be transmitted. The signal to be transmitted is nonetheless correctly reconstructed in the far field. Two approaches for generating the radiated signals were investigated. The first approach consists in partitioning the antenna in two halves, each of which radiates a phased modulated signal, since such signals allow to operate the power amplifiers at maximum efficiency. The second approach consists in radiating burst signals, such that each burst is a phased modulated signal. Although the first approach proved ineffective, the second approach allows reducing power consumption between 12% and 44% and the dissipated power between 73% and 84%, provided that power amplifiers can be switched off during the idle periods of the bursts. |
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| Main Authors: | Rama, Leonardo Paulo Lucas |
| Subject: | Phased array antenna Energy efficiency Power amplification Peak-to-average power ratio |
| Year: | 2023 |
| Country: | Portugal |
| Document type: | master thesis |
| Access type: | open access |
| Associated institution: | Universidade de Aveiro |
| Language: | English |
| Origin: | RIA - Repositório Institucional da Universidade de Aveiro |
| Summary: | The telecommunications sector is currently transiting towards the fifth generation wireless networks. Such a transition comes with new challenges, in particular the growth of the number of connected devices. Having more devices consuming more bandwidth shall unavoidably increase the power consumption of wireless networks, and thus its carbon footprint, unless energy efficiency is increased. For this reason, this work aims to contribute to increasing the energy efficiency of highly directive and flexible antenna transmitters: phased array antennas. The strategies explored in this work focus on manipulating the radiated signals, which means that such signals are substantially different from the signal to be transmitted. The signal to be transmitted is nonetheless correctly reconstructed in the far field. Two approaches for generating the radiated signals were investigated. The first approach consists in partitioning the antenna in two halves, each of which radiates a phased modulated signal, since such signals allow to operate the power amplifiers at maximum efficiency. The second approach consists in radiating burst signals, such that each burst is a phased modulated signal. Although the first approach proved ineffective, the second approach allows reducing power consumption between 12% and 44% and the dissipated power between 73% and 84%, provided that power amplifiers can be switched off during the idle periods of the bursts. |
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Funded activities
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