Compact Antenna Systems for Future Smartphone Multi-Frequency Wireless Standards May 11, 2023 Shiban K. Koul, Indian Institute of Technology, Delhi, India, G. S. Karthikeya, BMS College of Engineering, Bangalore, India, Ajay K. Poddar, Synergy Microwave, Paterson, N.J., and Ulrich L. Rohde, University of the Armed Forces Federal University, Munich, Germany 16 Comments