Effect of the defected microstrip structure shapes on the performance of dual-band bandpass filter for wireless communications

Mussa Mabrok,Zahriladha Zakaria,Yully Erwanti Masrukin,Hussein Alsariera,Tole Sutikno

doi:10.11591/eei.v10i1.2662

Abstract

Due to the progression growth of multiservice wireless communication systems in a single device, multiband bandpass filter has attract a great attention to the end user. Therefore, multiband bandpass filter is a crucial component in the multiband transceivers systems which can support multiple services in one device. This paper presents a design of dual-band bandpass filter at 2.4 GHz and 3.5 GHz for WLAN and WiMAX applications. Firstly, the wideband bandpass filter is designed at a center frequency of 3 GHz based on quarter-wavelength short circuited stub. Three types of defected microstrip structure (DMS) are implemented to produce a wide notch band, which are T-inversed shape, C-shape, and U- Shape. Based on the performance comparisons, U-shaped DMS is selected to be integrated with the bandpass filter. The designed filter achieved two passbands centered at 2.51 GHz and 3.59 GHz with 3 dB bandwidth of 15.94 % and 15.86 %. The proposed design is very useful for wireless communication systems and its applications such as WLAN and WiMAX

Highlights

Development in wireless communication has created more potential in IEEE 802 family local area networks and metropolitan area networks
As the wireless communications benchmark are continuously transforming to boost the new features and technologies. Both of base station and end-user terminal have to implement dynamic communication chains capable of supporting multi-frequency that implied by Software-defined radio (SDR) [1, 2]
Wideband bandpass filter wideband BPF is designed based on conventional λ/4 short circuited stub for the frequency band 2.3-3.9 GHz to cover the wireless communication applications such as WiMAX and WLAN

Summary

INTRODUCTION

Development in wireless communication has created more potential in IEEE 802 family local area networks and metropolitan area networks. As the wireless communications benchmark are continuously transforming to boost the new features and technologies. Both of base station and end-user terminal have to implement dynamic communication chains capable of supporting multi-frequency that implied by Software-defined radio (SDR) [1, 2]. This SDR system will makes it easy to contain new standards with less hardware modification and reduces the time consuming. This paper presents study and comparison of different DMS shapes responses and their effects on the performance of dual-band bandpass filter

RESEARCH METHOD

CONCLUSION