Microwave Bandpass Filter Based on Electromagnetic Band Gap Structure

In this paper, a microwave bandpass filter with mushroom-like EBG and transmission line using two layer structure is proposed. The proposed structure is composed of the four units of conventional mushroom-like EBG which are cascaded to yield multi-bandpass characteristic. The characteristics of the conventional mushroom-like EBG and one, two and three slit-top mushroom-like EBG are studied and compared. Finally the simulated and measured results for transmission characteristics are investigated and are in good agreement.