High Gain Single Stage Amplifier with Wideband Characteristic for Wireless Communication

Abstract

Abstract As one of famous wireless telecommunication applications, cellular communication has been widely used around the world as a mean of wireless communication. Recently, it is common to find people who use mobile phones which support for 2G, 3G, and even Wi-Fi applications, so there is a need to develop some devices such as antenna, filter, and signal processor and amplifier in particular to provide all those applications. In this paper, the design of single stage amplifier which has high gain and wideband characteristics is proposed as the focus of research. The amplifier which is designed based on a BFP420 transistor type employs microstrip lines as the impedance matching circuit both at input and output ports. To obtain the desired characteristic response, some design parameters such as bandwidth response, gain, noise figure, and voltage standing wave ratio (VSWR) are used as performance indicator of the proposed amplifier. It is found that the impedance matching circuit plays an important role required to achieve the objective of design. From the result, it is shown that the proposed amplifier has 18 dB gain for 1.4 GHz bandwidth response ranges from 1.25 GHz to 2.65 GHz with the maximum gain occurs at 2.1 GHz around 20 dB.