A Novel Resonant Ground Structure Based on a Cavity-Backed DGS

作者：Shin Imseob^*; Lee Tae Hak; Lee Juseop; Kim Young Sik

来源：IEEE Microwave and Wireless Components Letters, 2014, 24(5): 321-323.

DOI：10.1109/LMWC.2014.2309079

• Defected ground structure (DGS)
• electromagnetic bandgap (EBG)
• photonic bandgap (PBG)
• resonant ground structure (RGS)

In this letter, a new resonant ground structure (RGS) based on a cavity-backed DGS is proposed. The proposed RGS is similar to a DGS and is modeled by a parallel RLC resonance circuit. Since the proposed RGS utilizes a substrate-filled metallic cavity (SFMC) underneath the DGS, it leads to no back-radiation and high quality factor. The frequency responses and structural parameters are analyzed and verified via simulation and measurement. The quality factor of the proposed RGS with a spiral-shaped defect is larger than that of the DGS with the same defect by a factor of 7.4.

• 出版日期2014-5