A T-Type Fractal Boundary Single-Feed Circularly Polarized Microstrip Antenna
A single-feed T-type fractal boundary microstrip antenna is presented. It is established that a very good circular polarization is realizable with 3-dB axial ratio band-width of 1.27% at the center frequency of 2446 MHz by changing the electrical length in two directions of the square patch by using T-type fractal curve as boundary. Further it is shown that the surface area occupied by the antenna is reduced compared to the Euclidean shaped patch antenna without much degradation in gain of the antenna. Experimental results are compared with simulated results and a very good agreement is obtained. (C) 2008 Wiley Periodicals, Inc. Int J RF and Microwave CAE 19: 285-291. 2009.
t-type fractal boundary circular polarization axial ratio electrical length