Publications 2024

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https://hdl.handle.net/20.500.14170/3704

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Browsing Publications 2024 by Subject "5G Spectrum | MIMO | New Radio (NR) frequency bands | Self-Isolation"
  • Publication
    Metasurface-based Frequency Reconfigurable two-port MIMO Antenna for 5G Application
    ( 2024-01-01)
    Angadi S.
    ;
    Sharma Y.
    ;
    Nallanthighal Rghava S.
    ;
    Thennarasan Sabapathy
    In this work metasurface based frequency reconfigurable two-port multiple input multiple output (MIMO) antenna is presented. Initially, the proposed antenna is configured as a single-port radiating patch with pin-diode operating in the frequency reconfigurable mode. Later the designed antenna is converted to a two-port MIMO antenna that realizes an S11 below -10 dB intended for two resonant bands operating at 2.95 GHz (2.71-3.33 GHz) and 4.91 GHz (4.48-5.24 GHz) with pin-diode off-mode and 3.69 GHz (2.60-4.79 GHz) in on-mode with maximum peak realized gain of 6.29 dB and 4.13 dB at diode off-mode and 9.84 dB in diode on-mode. The two feeding ports of the proposed antenna are positioned adjacent to each other to permit the antenna in self-isolation mode later metasurface-reflector is placed below 10mm of radiator used as a de-coupling circuit and maintaining the minimum isolation of (S21) below -18.5 dB and maximum isolation of -23.07 dB in off-mode and -20.48 dB in diode on-mode. Moreover, the isolation and peak realized gain has improved after adding a reflector to the proposed antenna. The distance between antenna elements is 0.04 λo. The designed antenna is applicable for 5G new radio (NR) bands of n7, n48, n77, and n78 in on-mode, and n79 in diode off-mode respectively.
  • Publication
    Self-Isolated Frequency Reconfigurable two-port MIMO Antenna for 5G Application
    ( 2024-01-01)
    Angadi S.
    ;
    Sharma Y.
    ;
    Rghava S.N.
    ;
    Thennarasan Sabapathy
    In this work two-port multiple input multiple output (MIMO) antenna with self-isolation between antenna elements is presented. Initially, the proposed antenna is constructed as a single-port square-shaped radiating patch connected diagonally with a stub to operate the antenna in frequency reconfigurable mode. A 2×2 mm slot is cut at the middle part of the stub for implementing reconfigurability on the radiating patch to operate the antenna in multi-functional mode. Later the proposed antenna is converted to two-port frequency reconfigurable MIMO antenna that realizes an S11 below -10 dB intended for two resonant bands operating at 3.79 GHz (3.41-4.04 GHz) with pin-diode off-mode and 4.53 GHz (4.69-4.88 GHz) in on-mode with maximum peak realized gain of 4.93 dB at diode off-mode and 4.55 dB in pin diode on-mode. moreover, the gain is enhanced by 1.5 dB after converting to the two-port antenna. The two feeding ports of the proposed antenna are positioned orthogonal to each other to permit the antenna in self-isolation mode without connecting any de-coupling circuit and maintaining the mutual coupling (S21) below-21 dB in off-mode and -29.50 dB in diode on-mode. The distance between antenna elements is 0.12 λ0. In addition to that, two-port MIMO of envelope correlation coefficient (ECC), channel capacity loss (CCL), total active reflection coefficient (TARC), mean effective gain (MEG), and diversity gain (DG) are simulated. The designed antenna is applicable for 5G new radio (NR) bands of n48, n78 in off-mode, and n79 in on-mode respectively.