A 3.15 GHz Digital Class E Load-Modulated Balanced Amplifier

Master thesis (2024)

Authors

H.D. Denekamp Electrical Engineering, Mathematics and Computer Science

Contributors

S.M. Alavi Electronics - EEMCS (mentor)
G. van der Bent TNO Utrecht (mentor)
M. Spirito Electronics - EEMCS (graduation committee member)
M. Alonso Del Pino Tera-Hertz Sensing - EEMCS (graduation committee member)
Faculty
Electrical Engineering, Mathematics and Computer Science, Electrical Engineering, Mathematics and Computer Science
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Published Date

01-07-2024

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Abstract

Radar technology requires high efficiency and wide bandwidth performance at high output powers. However, new developments like using Joint Communication and Radar Sensing (JCRS), pulse shaping, and amplitude tapering provides an additional requirement: amplitude modulation. To satisfy all of these requirements, a Load-Modulated Balanced Amplifier (LMBA) using a wideband Class E is designed for 2.9-3.4 GHz using GaN transistors. First, an accurate linear model for the transistor is presented. After this, a new state-space solution for a Class-E LMBA is derived. And lastly, a LMBA using a wideband Class E is presented. Using a lossless matching network, the GaN-based amplifier has an average drain efficiency of 81 % over the full 10 dB power back-off. However, the final design has an average drain efficiency of 45 % with a peak output power of 44 dBm.

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