Vikas Vishnu Khairnar
@vitap.ac.in
VIT-AP UNIVERSITY
Scopus Publications
- A Wideband and High Gain Cross-Slot Antenna Using Partially Reflecting Surface
Venkataswamy Suryapaga, Vikas V. Khairnar
International Journal of Communication Systems, 2026
This paper presents a wideband, high gain Fabry‐Perot cavity antenna operating at 3.5 GHz. The antenna utilizes a cross‐slot as the main radiating element, along with an artificial magnetic conductor (AMC) layer and a partially reflecting surface (PRS) layer. The integration of a AMC layer beneath the cross‐slot antenna facilitates high gain and unidirectional radiation characteristics. Additionally, a PRS layer is positioned in front of the antenna to further enhance both bandwidth and gain. The proposed antenna design achieves a 10 dB impedance bandwidth ranging from 3.02 to 3.89 GHz (25.43%) with a peak gain of 9.56 dBi. Overall size of the antenna is , where represents free space wavelength at an operating frequency of 3.5 GHz. The simulated and measured results are found to be in good agreement. - Wideband circularly polarized antenna using uniform and non-uniform metasurfaces
Sandireddy Ramadevi, Vikas Vishnu Khairnar
International Journal of Microwave and Wireless Technologies, 2026
This paper presents a circularly polarized (CP) antenna employing both uniform and non-uniform metasurfaces to achieve wideband characteristics. The proposed antenna consists of a dual-feed CP antenna as the source element, a 4 $\\times$ 4 metasurface lattice as the superstrate, and a sequential feed network. Initially, the performance of the antenna is analyzed using a uniform metasurface. Subsequently, by adjusting the size of the inner unit cells, the uniform metasurface is transformed into a non-uniform configuration. The proposed design with a uniform metasurface achieves a $-$ 10 dB impedance bandwidth ranging from 5.21 to 6.47 GHz (21.57%) and a 3-dB axial ratio bandwidth from 3.96 to 6.67 GHz (50.9%). The use of a non-uniform metasurface significantly improves the overall antenna performance, achieving a $-$ 10 dB impedance bandwidth and 3-dB AR bandwidth of 4.98 to 7.45 GHz (40%) and 2 to 7.26 GHz (113%), respectively. The optimized design with a non-uniform metasurface is fabricated and tested. Overall size of the antenna is 40 $\\times$ 40 $\\times$ 3.4 mm $^3$ (0.72 $\\times$ 0.72 $\\times$ 0.062 $\\lambda_{0}^3$ ), where $\\lambda_{0}$ represents effective wavelength at an operating frequency of 5.5 GHz. The simulated and measured results of the proposed antenna are found to be in good agreement. - A Wideband Pattern Reconfigurable Antenna Using Transmissive Coding Metasurface
Gandham V. Vinod, Vikas V. Khairnar
Microwave and Optical Technology Letters, 2025
In this paper a wideband pattern reconfigurable antenna operating at the center frequency of 3.5 GHz is presented. The antenna configuration consists of a cross‐slot antenna as the source element, an artificial magnetic conductor (AMC) as the reflector, and a transmissive coding metasurface (TCMS) functions as the phase gradient. The length of the cross‐slot antenna is optimized to 1‐ to ensure excellent impedance matching across a broad frequency spectrum, where denotes the guided wavelength at the operational frequency of 3.5 GHz. The cross‐slot antenna is integrated with an AMC to achieve a high‐gain unidirectional radiation pattern. The TCMS positioned above the source antenna, plays a crucial role in controlling the antennas overall radiation characteristics. By modulating the working state of PIN diodes within the TCMS, the antenna achieves broad frequency coverage, wide‐angle beam steering, and variable beamwidth. The proposed antenna demonstrates the capability to scan the main beam in the H‐plane from to . Additionally, the 3‐dB half‐power beamwidth can be adjusted from to when the antenna is radiating in the broadside direction. Across all operating modes, the antenna offers a wide operating bandwidth ranging from 3.04 to 4.72 GHz (43.29%). The simulated and measured results exhibit excellent agreement. - Pattern reconfigurable antenna with circular polarization characteristics using transmissive coding metasurface
Gandham V. Vinod, Vikas V. Khairnar
AEU International Journal of Electronics and Communications, 2025 - A closely spaced dual-band dual-sense linear-to-circular polarization converter for X-band applications
Anusha Undrasi, Debidas Kundu, Kamalesh Kumar K., Vikas V. Khairnar
Optik, 2025 - Wide-Angle Beam Steering Pattern Reconfigurable Antenna with Ground Plane Truncation
Gandham V Vinod, Vikas V. Khairnar
2025 5th International Conference on Artificial Intelligence and Signal Processing Aisp 2025, 2025 - A wideband and multibeam pattern reconfigurable antenna using partially reflecting surface
Venkataswamy Suryapaga, Vikas V. Khairnar
International Journal of Microwave and Wireless Technologies, 2024
This paper presents a pattern reconfigurable antenna that accomplishes wideband and multibeam characteristics. The antenna design comprises a cross-slot radiator as the primary element and reconfigurable partially reflecting surface (PRS) layer placed above and below the cross-slot radiator. This configuration allows the antenna to adapt its radiation patterns effectively. The choice of the cross-slot radiator is based on its capability to offer wideband characteristics. The PRS layer consists of a precisely arranged array of 4×4 unit cells, incorporating PIN diodes into both the upper and lower PRS layers. The direction of radiation pattern can be changed by altering operating states of the PIN diodes on the PRS layer. The antenna operates in three distinct states, each exhibiting a unique radiation pattern. The antenna produces broadside, backward, and bidirectional radiation patterns. It demonstrates effective pattern reconfigurability across the frequency range of 3.10–3.86 GHz (21.71%), with a peak gain of 9.60 dBi. The simulated and measured results of the antenna are found to be in good agreement. - A compact dual-band linear-to-circular polarization converter for X-band and Ku-band applications
Anusha Undrasi, Vikas V. Khairnar
Optics Communications, 2024 - An ultrathin wideband linear-to-circular polarization conversion metasurface for X-band applications
Anusha Undrasi, Vikas V. Khairnar
AEU International Journal of Electronics and Communications, 2024 - Pattern reconfigurable antenna with two-dimensional beam steering capability using metasurface
Venkataswamy Suryapaga, Vikas V. Khairnar
AEU International Journal of Electronics and Communications, 2024 - Review on Multifunctional Pattern and Polarization Reconfigurable Antennas
Venkataswamy Suryapaga, Vikas V. Khairnar
IEEE Access, 2024 - Wideband Compact Circularly Polarized Patch Antenna Array Using Non-uniform Metasurface
Sandireddy Ramadevi, Vikas V. Khairnar
2024 IEEE Microwaves Antennas and Propagation Conference Mapcon 2024, 2024 - A Wideband Beam Steering and Beamwidth Reconfigurable Antenna Using Coding Metasurface
Gandham V. Vinod, Vikas V. Khairnar
IEEE Access, 2024 - Energy-Efficient Long-Range Sectored Antenna for Directional Sensor Network Applications
Shamanth Nagaraju, Lucy J. Gudino, Bhushan V. Kadam, Vikas V. Khairnar, Joseph X. Rodriguez, et al.
IETE Journal of Research, 2024 - Circularly Polarized Pattern Reconfigurable Antenna using Coding Metasurface
Gandham V. Vinod, Vikas V. Khairnar
2023 IEEE Microwaves Antennas and Propagation Conference Mapcon 2023, 2023 - Pattern Reconfigurable Antenna using Programmable Metasurface
Venkataswamy Suryapaga, Vikas V. Khairnar
2023 3rd International Conference on Artificial Intelligence and Signal Processing Aisp 2023, 2023 - A Compact Dual-Band Linear-to-Circular Polarization Conversion Metasurface for X-band and Ku-band Applications
Anusha Undrasi, Vikas V. Khairnar
2023 IEEE Microwaves Antennas and Propagation Conference Mapcon 2023, 2023 - LoRa-based Novel System for Smart Agriculture
Kamalesh Kumar K, Vikas V. Khairnar, Bhushan V. Kadam
2nd International Conference on Wireless Antenna and Microwave Symposium Wams 2023, 2023 - Pattern Reconfigurable Cross-Slot Antenna using Artificial Magnetic Conductor and Partially Reflecting Surface
Venkataswamy Suryapaga, K Kamalesh Kumar, Vikas V. Khairnar
2023 IEEE Microwaves Antennas and Propagation Conference Mapcon 2023, 2023 - Wideband and High Gain Circularly Polarized Microstrip Antenna Array using Metasurface
Sandireddy Ramadevi, Vikas V. Khairnar
2022 IEEE Microwaves Antennas and Propagation Conference Mapcon 2022, 2022 - A Parasitic Antenna with Independent Pattern, Beamwidth and Polarization Reconfigurability
Vikas V. Khairnar, C. K. Ramesha, Lucy J. Gudino
Wireless Personal Communications, 2021 - Rectangular Microstrip Patch Antenna Array Based Sectored Antenna for Directional Wireless Sensor Networks
Shamanth Nagaraju, Lucy Gudino, Bhushan Kadam, Vikas V. Khairnar, Joseph Xavier Rodrigues, et al.
2020 12th International Symposium on Communication Systems Networks and Digital Signal Processing Csndsp 2020, 2020 - A survey on beamwidth reconfigurable antennas
Vikas V. Khairnar, C. K. Ramesha, Lucy J. Gudino
Lecture Notes in Electrical Engineering, 2020 - A reconfigurable microstrip cross parasitic antenna with complete azimuthal beam scanning and tunable beamwidth
Vikas V. Khairnar, Bhushan V. Kadam, C. K. Ramesha, Lucy J. Gudino
International Journal of RF and Microwave Computer Aided Engineering, 2019 - A reconfigurable parasitic antenna with continuous beam scanning capability in H-plane
Vikas V. Khairnar, Bhushan V. Kadam, C.K. Ramesha, Lucy J. Gudino
AEU International Journal of Electronics and Communications, 2018
