Defected Ground Structure (DGS) and uniplanar compact-photonic band gap (UC-PBG) structures for reducing the size and enhancing the out-of-band rejection of microstrip bandpass ring resonator filters

Citation:
El-Shaarawy, H. B., F. Coccetti, R. Plana, E. M. Said, and E. A. Hashish, "Defected Ground Structure (DGS) and uniplanar compact-photonic band gap (UC-PBG) structures for reducing the size and enhancing the out-of-band rejection of microstrip bandpass ring resonator filters", WSEAS Transactions on Communications, vol. 11, issue 7, pp. 1112 – 1121, 2008.