Doherty Power Amplifier Linearity Improvement Using Internal Feed-Forward Network

Articles in Press

Document Type : Original Article

Authors

Faculty of Electrical Engineering, University of Science and Technology, Tehran, Iran

Abstract

The continuous expansion of telecommunication systems has led to more complex design of devices. One of the most important of these devices, which is usually considered as the last stage of the transmitter before the antenna, is the power amplifier, and one of these design complications is the need for more linearity in the power amplifier and high efficiency at the same time. There are various methods to improve the linearity of amplifiers, but usually, the higher the linearity improvement, the more complex it is, and the efficiency usually decreases. Meanwhile, the design of the amplifier itself is complicated. One of the suitable methods to improve the linearity of the amplifier, which also increases the efficiency at the same time, is the Doherty structure. Different structures of Doherty arrangement have been investigated, which create different properties. In this paper, a new arrangement for the Doherty structure is presented, which gives a great improvement in linearity and at the same time has high efficiency. This arrangement is a combination of doherty and forward structure and its adjustment can be done easily.

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References

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Tabriz Journal of Electrical Engineering

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Available Online from 04 December 2024

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