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Your search keyword '"Penmatsa, Krishna Kanth Varma"' showing total 12 results
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11. Circularly polarized tunable graphene-patch over SiO2 substrate for THz applications.

Author

Narayanaswamy, Nagesh Kallollu, Bhosle, Manju Ramrao, Penmatsa, Krishna Kanth Varma, and Dwivedi, Ajay Kumar

Subjects
CIRCULAR polarization, CHEMICAL potential, GRAPHENE, ANTENNAS (Electronics), PERMITTIVITY, QUANTUM cascade lasers
Abstract

In this communication, a graphene-based radiator is designed and analyzed at THz frequency. A tilted dumbbell-shaped aperture is loaded on a graphene patch for creating degenerated orthogonal mode with 90° phase shift, which in turn produces circularly polarized (CP) waves. Graphene patch is placed over SiO2 substrate. Slot loading in graphene patch shifts the frequency band due to a reduction in effective permittivity. Another important feature of the proposed antenna is to provide a tunable feature in the frequency response and axial ratio by changing the chemical potential. The proposed antenna operates from 5.85 to 6.05 THz. 3-dB axial ratio is obtained from 5.85 to 5.95 THz. Good value of gain, as well as left-handed circular polarization characteristics, makes the proposed THz antenna in sensing applications. [ABSTRACT FROM AUTHOR]

Published
2022
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