Summary
International Symposium on Antennas and Propagation
2011
Session Number:FrE2
Session:
Number:FrE2-2
Design of a Multi-Bandpass Filter using Slit-top Mushroom-Like Electromagnetic Band Gap Structures
A.Yatongchai, R.Wongsan, M.Krairiksh,
pp.-
Publication Date:2011/10/25
Online ISSN:2188-5079
Summary:
A multi-bandpass filter using the slit-top mushroom-like on two-layer structure of electromagnetic band gap (EBG) and transmission line is proposed in this paper. The challenge is to design an EBG structure providing variety of bandwidths of the multi-bandpass filter. The proposed structure of filter in this paper is composed of the four units of slit-top mushroom-like EBG, which are cascaded to yield the multi-bandpass characteristic. The differences of dimension and number of slittops truncating on the surface of mushroom-like EBG units that influence to the resonant frequency and bandwidth of filter have been shown and compared to the conventional mushroom-like EBG unit. Afterwards, the appropriate slit-top on the classical mushroom-like patches of EBG structure has been considered for the proposed multi-bandpass filter. Finally, the simulated and measured results for transmission characteristics, S21, are investigated to be in good agreement.