A wideband multiresonant single-element slot antenna

A very simple way of designing wideband printed antennas with excellent radiation parameters over the entire bandwidth is presented. Many existing wideband, single-element, printed antennas achieve wideband operation from different radiation mechanisms and field distributions at different frequencies, which results in inconsistent radiation patterns over their bandwidth. Unlike such antennas, the studied antenna has consistent radiation parameters over a 1.86:1 bandwidth and has very low cross polarization levels at different directions and frequencies. The antenna is a single-element slot antenna with a microstrip feed modified to create two fictitious short circuits along the slot. This results in relatively close resonant frequencies to give a wider bandwidth.