RESEARCH BEFORE JOINING IISC BANGALORE
PH.D. RESEARCH @IIT KANPUR
Studies on Multi-band/Wide-band MIMO Antennas: Implementation and Characterization in Far-field/Near-field
Supervisor: Prof. Kumar Vaibhav Srivastava, EE Dept., IIT Kanpur
Summary: The two main objectives of my PhD research were:
A. To Realize two/four-element multiple-antenna architectures and associated circuitry for integrated 4G/5G Systems: We developed several application-oriented multi-band/wide-band MIMO antenna/arrays based on microstrip-fed printed dipoles (or quasi-Yagi elements) and monopoles. The proposed design concepts were validated by full-wave simulations using Ansys HFSS as well as measurement results on fabricated antenna prototypes.
B. To Formulate novel algorithms for efficient characterization of spatial correlation and energy dynamics in multiple antenna systems: We constructed new algorithms based on finite-difference time-domain (FDTD) technique, infinitesimal dipole modelling (IDM), cross-correlation Green's functions (CGF) and time-domain signal-processing, for computing envelope correlation coefficient (ECC) and time-domain reactive energy of multi-band/wide-band MIMO antennas.
For the part-B as mentioned above, we were immensely benefited from collaborative research with Prof. Yahia Antar in Royal Military College, Canada and Dr. Said Mikki, University of New Haven, USA., especially during my visiting studentship in RMC.
A brief visual summary of my research on MIMO Antennas during Ph.D. is provided below:
M.TECH. RESEARCH @IIT KANPUR
Studies on Metamaterial-Inspired design of Dual-Band and Band-notched UWB Antenna
Supervisor: Prof. Kumar Vaibhav Srivastava, EE Dept., IIT Kanpur
Summary:
First, we propose dual-band antennas targeted at 3.3-3.8 GHz/5.15-5.85 GHz (sub-6 GHz 5G/upper-WLAN) application-bands. We use coax-fed microstrip patch antenna, loaded with complementary split-ring resonators (CSRRs) and placed over a partially defected ground plane.
Secondly, we propose several designs of band-notched UWB antennas working in the 3.1-10.6 GHz frequency range. SRRs, CSRRs and modified mushroom structures are embedded in UWB radiators to get sharp-notch bands, that suppress electromagnetic interference caused by existing narrowband systems like WLAN (5.15-5.85 GHz) or X-band Communication links (7.9-8.4 GHz).
POST-DOCTORAL RESEARCH @RMC Canada
ANTENNAS DESIGNED @IITK
PROPOSED FDTD-IDM-CGF METHODOLOGY
