This fractal ring antenna generated by Minkowski fractal
model and fed by capacitive coupling has been presented for
the multiple operating frequencies band in wireless
communication systems. It has been found that the first,
second, and third operating frequency bands have been
controlled by varying the significant parameters of Ws], WSb
Wp], Wp2 and Wp3' Especially, the present antenna propagates
the omnidirectional patterns at all of operating frequencies,
supporting the application of WLAN IEEE 802.1 I a/big (2.4 -