2.45GHz PA/LNA/switch/antenna front-end

Abstract

Recently, Data communication using 2.45GHz ISM band for wireless networks such as Bluetooth, Wireless LAN, wireless video, audio has found widespread use for the last few years. The RF amplifiers & antenna are the critical components in the RF front end & are expected to provide a suitable output power at a very good gain with high efficiency and linearity. The amplifiers will be based on the components such as bipolar junction transistor, field effect transistor & RFIC amplifier to see their characteristics & performances like output power level, gain, linearity, efficiency, 1dB compression point & inter-modulation in 2.4~2.5GHz frequency ranges. The switches circuit will use PIN diode for the design. We will see the insertion loss, isolation & power handling. In the antenna design, we will look at some different designs on their performance such as gain, standing wave ratio & efficiency. In this project, we will use various procedures for the design from the concept to the prototypes manufacturing through RF circuitry & antenna simulations to implementations. Various procedures involved in the design of the Class A amplifier such as DC simulation, bias point selection, input and output matching circuit design and the design of a bias network are explained.