A Review on Micro strip Band Pass Filters for Global Positioning System ApplicationsÂ

Abstract

Global positioning system is a worldwide radio navigation system formed from a constellation of 24 satellites and their ground stations. GPS receivers are becoming miniaturized. Radio frequency (RF) filters operating in the microwave frequency range are needed for applications including wireless and satellite communications as well as military applications. Most communication system contains an RF front end which performs signal processing with RF filters. Planar or printed circuit board (PCB) based filters are popular and relatively practical to design. Band pass filters play a significant role in wireless communication systems. Transmitted and received signals have tobe filtered at a certain center frequency with a specific bandwidth. This paper focuses on review of L-band BPF filter designs at center frequency 1.575 GHz developed by different researchers & in depth analysis of methods used by them.