Volumetric miniaturization, compactness, light weight, low cost, low loss, improved efficiency, multi band electromagnetic responses are the basic key design and application issues for any innovative technique used for microstrip filter. The current trend in the modern researches for microstrip filter is using the double negative metamaterial as a substrate to meet the stringent requirements. Naturally available conventional double positive dielectric (DPS) materials such as FR-4, PTFE, and Teflon have been popularly used as substrates on the cost of deteriorating the overall electrical performance of transceiver systems. These DPS materials have both the dielectric permittivity (ε) and magnetic permeability (µ) positive or zero. The recent wireless communication industry demands the microstrip filters designed using mu-negative (MNG), epsilon negative (ENG), single negative or double negative (DNG) left-handed electromagnetic materials having ε and/or µ less than zero replacing those having been designed using DPS. It can be achieved through the introduction of Split Ring Resonator (SRR) and rod structure in thin slab of naturally available DPS substrate. Mechanical design issues such as 2-D alignment and 3-D orientation, dimensions, spacing between SRRs and rods, number-size and density of unit cells placed in the DPS, and structural-materialistic properties deciding its electrical characteristics and the filter responses are focused. This proposed research work opens the paths for the future young aspirants to design and develop multi band miniaturized filters for the higher range of microwave regime.
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