1. Kumar, G., and Ray, K.P.: ‘Broadband microstrip antennas’, (Artech House, USA 2003)
2. Wong, K.L.: ‘Compact and broadband microstrip antennas’, (John Wiley and Sons, Inc., New York
3. IE3D 7.1: (Zeland Software Inc., Fremont, CA, 2000)
4. Ensemble 6.1 (Ansoft Software Inc., USA)