A Compact Uniplanar Electromagnetic Bandgap Structure with Wide Bandgap

This paper presents a new compact uniplanar electromagnetic bandgap (EBG) structure for K band applications. The proposed unit cell consists of corner square patches which are connected at the center by meander lines and interdigital capacitors (IDC) along the edges. The dispersion characteristic of the EBG is analyzed using an Eigenmode solver and later the bandgap property is verified using an open-ended symmetric transmission line method. Numerical simulation of the proposed EBG shows a bandgap of 21.5 % over 17.33−21.5 GHz. The unit cell has the periodicity of 0.16 λ
0
, where λ
0
is the wavelength at the center frequency of the bandgap.