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This paper presents a 32 GHz transformer-based Doherty power amplifier (PA) in a 28 nm bulk CMOS process. There are two techniques proposed: linearization by means of AM-PM and AM-AM compensation of the class AB and the class C amplifiers; and parallel-series-parallel power power combiner, wherein a current-mode parallel combiner complements the Doherty's voltage-mode series combiner to boost the...
5G poses severe challenges to PA design. In the first place, output power and efficiency are of prime importance because of battery lifetime. The tradeoff between linear output power and efficiency is typically challenged by the high PAPR due to QAM modulation and/or OFDM techniques. But this important trade-off is challenged even more in 5G due to the high bandwidth requirements. Furthermore, the...
5G poses severe challenges to PA design. In the first place, output power and efficiency are of prime importance because of battery lifetime. The tradeoff between linear output power and efficiency is typically challenged by the high PAPR due to QAM modulation and/or OFDM techniques. But this important trade-off is challenged even more in 5G due to the high bandwidth requirements. Furthermore, the...
This paper presents a multicarrier 60 GHz transmitter for distance measurement (ranging) in an indoor wireless localization system, achieving mm-precision with high update rate. The architecture comprises a baseband subcarrier generator, an upconverter, and a power amplifier. There are three key innovations, all stemming from careful hardware-algorithm co-design: 1) efficient frequency planning of...
This paper presents an efficient multicarrier 60GHz transmitter for distance measurement (ranging) in an indoor wireless localization system. By exploiting hardware-algorithm co-design, a high precision, high update rate, yet power efficient transmitter architecture is achieved, which comprises subcarrier generation through frequency division, an upconverter, and a power amplifier. An efficient frequency...
In this paper, a pulse generator circuit for mm-wave imaging systems is presented. The pulse generation system consists of a pulse generator core circuit and a nonlinear transmission line (NLTL) as pulse compressor. The width compression is the key feature of this design as a pulse narrowing in time domain corresponds to bandwidth expansion in frequency domain. A digitally generated pulse is decomposed...
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