Abstract
The coupling between the ports of a two-port device implemented based on a single dielectric resonator (DR) of silicon material can be controlled to develop the terahertz multi-input-multi-output (MIMO) antenna and a filter. The ground plane of device is modified by engraving a circular slot for obtaining the function of a two-port MIMO dielectric resonator antenna with isolation between the ports as 18.3 dB. The radiating surface of DR is then coated with graphene material to further enhance the level of isolation up to 40.91 dB. Graphene coating also provides the tunable antenna response by varying the applied external DC field on graphene. The antenna can offer pattern diversity with envelop correlation coefficient less than 0.01 and diversity gain 9.94 in the passband. The isolation of this two-port antenna can further be enhanced up to 49 dB by covering the graphene layer with metal coating. Moreover, the coupled power between the ports of the device can be controlled to implement a bandpass filter by engraving a circular slot in graphene layer and filling it with metal. The amount of the power coupled between the ports of the filter can be controlled by varying the chemical potential of graphene.
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Ms. Nishtha developed the idea and implemented the research work and wrote the manuscript. Professor R.S.Y. supervised the whole work and G.V. helped in implementing the research work and writing the manuscript. All the authors discussed and contributed in writing and organization of the research work.
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Nishtha, Yaduvanshi, R.S. & Varshney, G. Isolation control for implementing the single dielectric resonator based tunable THz MIMO antenna and filter. Opt Quant Electron 55, 357 (2023). https://doi.org/10.1007/s11082-023-04623-0
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DOI: https://doi.org/10.1007/s11082-023-04623-0