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Fractal boundary circularly polarised single feed microstrip antenna

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2 Author(s)
Rao, P.N. ; Dept. of Electron. & Commun. Eng., Nat. Inst. of Technol., Warangal ; Sarma, N.

A Koch fractal boundary circularly polarised single feed microstrip antenna is presented. The proposed antenna gives very good circular polarisation with axial ratio close to 0 dB at the centre frequency of 2510 MHz, 3 db axial ratio bandwidth of about 1.6% and impedance bandwidth of 6.2%. Tt is established that it is easy to obtain circular polarisation using the fractal curve as the boundary. The antenna provides about 6 dB gain over the frequency band of operation.

Published in:

Electronics Letters  (Volume:44 ,  Issue: 12 )