Abstract
Two new types of interdigital capacitors (IDC) are proposed to be used in a novel Composite Right/Left-Handed Transmission Line (CRLH-TL) structure. The LC parameters of the traditional and novel IDC are respectively extracted for comparisons with Ansoft HFSS9 full-wave simulation. In contrast with traditional structure, such two new IDC enhance the capacitance values dramatically by about 38.7% and 100%, respectively, compared with the traditional structure within the same size of etched area. Also dispersion relationships are calculated by both simulation and Bloch theorem. A one dimension (1-D) CRLH-TL structure consisting of such new IDC and meandering grounded inductors is designed, modeled and simulated. The presented structure is able to operate within a much lower and wider Left-handed (LH) frequency band than traditional ones.
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