Publicação
Analysis and performance evaluation of high efficiency amplifiers for 5G and Wi-Fi waveforms
| Resumo: | The trend of wireless and mobile networks is to increase the capacity in terms of the number of users connected to the mobile network and the capacity in terms of bit rate. The main goal of 5G is to provide ultra-reliable, fast, and low-latency communications. The field of applications of 5G entails, for example, IoT, smart cities, and virtual reality. To achieve this level of massification, the mobile handsets have to be the most low-cost and compact and the base stations need to be the most power-efficient possible. In order to achieve higher data rates and higher spectral efficiency, modulation schemes with high envelope fluctuations must be employed. Given this signal envelope fluctuation, state-of-the-art PA’s are working at a point where it only outputs 10 W of 100 W. Now given the complexity and the number of base stations a mobile operator has, it is not hard to imagine the energy costs. With this scenario in hand, a new technique called Quantized Digital Amplifier (QDA) with promising efficiency results is exposed. Moreover, the focus of the thesis leans on understanding the factors that condition the development of a power amplifier. With the development of an innovative design kit, the reader will understand the ins and outs of a class E power amplifier including a theoretical analysis of the losses due to real components. Based on this theoretical analysis and using a 130 nm CMOS technology, a class E cascode topology will be designed for four distinct output power levels. Namely, for a 12 mW output power level, a PAE of 46% was achieved. |
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| Autores principais: | Brito, Alexandre Miguel Afonso de |
| Assunto: | OFDM QDA Mobile Networks Class E PA 5G Wi-Fi |
| Ano: | 2022 |
| País: | Portugal |
| Tipo de documento: | dissertação de mestrado |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade Nova de Lisboa |
| Idioma: | inglês |
| Origem: | Repositório Institucional da UNL |
| Resumo: | The trend of wireless and mobile networks is to increase the capacity in terms of the number of users connected to the mobile network and the capacity in terms of bit rate. The main goal of 5G is to provide ultra-reliable, fast, and low-latency communications. The field of applications of 5G entails, for example, IoT, smart cities, and virtual reality. To achieve this level of massification, the mobile handsets have to be the most low-cost and compact and the base stations need to be the most power-efficient possible. In order to achieve higher data rates and higher spectral efficiency, modulation schemes with high envelope fluctuations must be employed. Given this signal envelope fluctuation, state-of-the-art PA’s are working at a point where it only outputs 10 W of 100 W. Now given the complexity and the number of base stations a mobile operator has, it is not hard to imagine the energy costs. With this scenario in hand, a new technique called Quantized Digital Amplifier (QDA) with promising efficiency results is exposed. Moreover, the focus of the thesis leans on understanding the factors that condition the development of a power amplifier. With the development of an innovative design kit, the reader will understand the ins and outs of a class E power amplifier including a theoretical analysis of the losses due to real components. Based on this theoretical analysis and using a 130 nm CMOS technology, a class E cascode topology will be designed for four distinct output power levels. Namely, for a 12 mW output power level, a PAE of 46% was achieved. |
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