Abstract
This paper presents a rectangular design to increase the performance of radiation in a rectangular waveguide which operates in X band at 8 GHz for the point to point communication. This research uses the metamaterials concept to design the near zero refractive index (NZI) which uses the Split Ring Resonator (SRR) structures to be stackable. The simulated results using the High Frequency Structure Simulator (HFSS) and MATLAB show that the stackable SRR has the refractive index near zero to reducing the size of waveguide to operate low frequency bands and enhancing directivity and gain in a rectangular waveguide from 4.7012 to 10.12 and 6.7716 dB to 10.041 dB, respectively. This structure can be operated between 7.75 to 8 GHz with the reflection coefficient less than −10 dB.
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