1. 5g Spectrum Gsma Public Policy Positionhttps://www.gsma.com/latinamerica/wp-content/uploads/2019/03/5G-Spectrum-Positions.pdf
2. 5g Spectrum Auction Picks up in 2018—Report by Gsahttps://www.telecomlead.com/5g/5g-spectrum-auction-picks-up-in-2018-report-by-gsa-88154
3. Introducing 5g Networks—Characteristics and Usageshttps://www.gemalto.com/mobile/inspired/5G
4. Microstrip and Printed Antennas: New Trends, Techniques and Applications;Guha,2011
5. An introduction to defected ground structures in microstrip circuits;Breed;High Freq. Electron.,2008