HARMONIC SUPPRESSION CHARACTERISTIC OF A CPW-FED CIRCULAR SLOT ANTENNA USING SINGLE SLOT ON A GROUND CONDUCTOR

A CPW-fed circular slot antenna with a slot on a ground conductor is presented for harmonic suppression. The antenna has a multi-band rejection characteristic where the second and higher rejection bands are integer-multiple of the first band, and this is generated by inserting single slot on a ground conductor of the antenna. Good agreement between the simulated and measured results is reported and the integer-multiple notch bands can be adjustable by changing the length of the slot on the ground plane.