1. Wong, K.: Compact and Broadband Microstrip Antennas. Wiley, New York (2002)
2. Kumar, G., Ray, K.P.: Broadband Microstrip Antennas. Artech House, Norwood (2003)
3. Deshmukh, A.A., Kumar, G.: Formulation of resonant frequency for compact rectangular microstrip antennas. Microw. Opt. Technol. Lett. 49(2), 498–501 (2007)
4. Deshmukh, A.A., Phatak, N.V., Nagarbovdi, S., Ahuja, R.: Analysis of broadband E-shaped microstrip antennas. Int. J. Comput. Appl. 80(7), 0975–8887 (2013)
5. Akdagli, A., Toktas, A., Kayabasi, A., Develi, I.: An application of artificial neural network to compute the resonant frequency of E-shaped compact microstrip antennas. J. Electr. Eng-Elektrotech. Cas. 64(5), 317–322 (2013)