Design and Performance Analysis of 2.5 GHz Microstrip Bandpass Filter for LTE

Abstract

Microwave filters since a long time have been an integral part of the radar and the telecommunication systems. Designing better and more accurate filters is the major requirement for the various possible communication techniques like the LTE (Long Term Evaluation) system and WiMAX systems. This paper aims to design microstrip bandpass filters for Parallel - Edge Coupled Line Filter and Interdigital Filter configurations for the frequency of 2.5 GHz used for LTE systems. For microstrip implementation, substrate Rogers TMM10 is used for both designs. The filters have been designed on the ADS software. The final conclusions have been drawn by analysing various performance parameters such as return loss, insertion loss, 3-dB bandwidth etc and found very much acceptable for applications.