Broadband circularly polarized wide-slot antenna

A new broadband single-fed circularly polarized (CP) wide-slot antenna is presented in the letter. The antenna is composed of a wide-slot, with a T-shaped stub and a microstrip T-junction. The CP operation is realized by the interaction from the T-shaped stub on the wide-slot and the T-junction. The antenna has been investigated numerically and experimentally. Measured result shows that the antenna has an impedance bandwidth of 58% and a 3-dB bandwidth of axial ratio of 22.2%. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 1005–1007, 2007; Published online in Wiley InterScience (www.interscience.wiley.com).DOI 10.1002/mop.22337