1. Balanis CA (2005) Antenna theory-analysis and design. Wiley
2. Garg R, Bhartia P, Bahl I, Ittipiboon A (2001) Microstrip antenna design handbook. Artech House Publishers, Boston, London
3. Kumar P, Singh G (2009) Microstrip antennas loaded with shorting post. Engineering 1(1):41–45
4. Kumar P, Singh G (2011) Theoretical investigation of the input impedance of gap-coupled circular microstrip patch antennas loaded with shorting post. J Comput Electron 10(1):195–200
5. Chakraborty M, Rana B, Sarkar PP, Das A (2012) Size reduction of a rectangular microstrip patch antenna with slots and defected ground structure. Int J Electron Eng 4(1):61–64