Filtering Power Divider Composed of SIW-based Bandpass Filter for WLAN Application

The future wireless communication system which leads to focus on Wireless Local Area Network (WLAN) research in that area is very fast. The development of WLAN equipment's including antennas, power dividers, and filters has raced to deliver the device to be compact, lightweight and low-cost. In this paper, a power divider integrated with filtering process, named as filtering power divider (FPD), is developed for 5.8 GHz WLAN application. In order to have compact size of device, the proposed FPD is composed of bandpass filter (BPF) made of Substrate Integrated Waveguide (SIW). The SIW-based BPF which is designed to work at the frequency of 5.8GHz designed to make the output as impedance matching network. The design was carried out using simulation software to investigate the effect of different parameters of filter to the filtering process as well as the output response of FPD. The characterization results show that the operating frequency, bandwidth response and isolation of the output ports of proposed FPD are 5.8GHz, 90MHz and 19dB, respectively. In addition, the presented FPD has advantages of compact, easy fabrication, and easy integration with other circuits.