Diseño y Simulación de un Amplificador de Bajo Ruido a la frecuencia de 2.4 GHz para aplicaciones de radar

Abstract

The project presents the design and simulation of a low noise amplifier (LNA) at the frequency of 2.4 GHz for radar applications. It starts with the selection of the transistor, which presents a considerable gain, a low noise figure parameter and a correct stability. With the manufacturer's data, the theoretical design is made using the S parameters of the transistor and the microwave circuit design techniques. The polarization network is designed using the operating point of the transistor, thus ensuring electrical isolation between the DC source and the radio frequency waves. The input coupling network fulfills that the reflection coefficient of the source is similar to the operation reflection coefficient to achieve the minimum noise figure. The output coupling network complies with the fact that the reflection coefficient of the load is similar to the conjugate of the output reflection coefficient, thus achieving maximum power transfer. Finally, the simulation of the amplifier is carried out using Advanced Design System (ADS) and Quite Universal Circuit Simulator (QUCS) tools to check and contrast the results obtained in the theoretical design.