Design and Simulation of Cascaded Class-A Microwave Power Amplifier

Abstract

-Microwave power amplifiers are the most significant components in wireless communications systems. As the technology continue to progress, the designers are facing new challenges and opportunities. The purpose of this work is to push the limits of efficiency and bandwidth of power amplifiers. The objective of this research is to design and build a prototype two stage Microwave power amplifier operated at 2.4 GHz with a linear region of operation up to our desired output of 0.5 watt or 27 dBm. The transistor used in the first stage is BFP540 while the output power of the first stage is the input of the second stage in which the ATF50189 transistor is used to for amplification. All the simulations and readings are taken by using AWR Microwave Office software. By using the load line Rl and the biasing points are achieved for both stages. The applications of our proposed device include many products in the field of microwave communications. One of the important applications of a Microwave power amplifier is in the output stage of a transmitter where a signal needs amplification before it is transmitted.

A two-stage power amplifier design for ultra-wideband applications

“…Digital pulse wireless, more commonly known as ultra-wideband is a high bandwidth radio technology is used for short range and low-power communications [1][2][3][4][5]. UWB has come to be known as a direct competitor to bluetooth and WiMax as it can fully utilize high data rate along with wide spectrum efficiency while using less or very low power transmission [6][7][8][9][10][11][12][13][14][15].…”

Design of Wide-band Power Amplifier based on Power Combiner Technique with Low Intermodulation Distortion

“…However, this work suffers from a limited bandwidth which is 1.1GHz, and which does not meet the specifications of wide-band power amplifier. In [5], Cascaded class A power amplifier operated at 2.4 GHz has been designed. The designed device can achieve 0.5 watts or 27 dBm output power.…”

Efficient Low-Complexity Digital Predistortion for Power Amplifier Linearization

“…However, high complexity DPD is undesirable because it leads to high power consumption and long-time delay due to intensive processing. Moreover, the main justification for the DPD technique is to gain more power-efficient PA, which is the most power consuming device in transmitters [13]- [15]. Therefore, it is essential that the power saved, by using DPD, is not spent on a high complexity DPD algorithm.…”