Patch antenna with T-shaped probe feed for broadband applications

We suggest in this work a new type of patch antenna feeding, namely, T-shaped probe. In comparison to the known L-shaped probe, the T-shaped one permits to increase the coupling between the feeding line and the radiator. Two patch antennas configurations are presented which consist of a rectangular radiator proximity coupled to a T-shaped probe. In the first configuration, the input return loss bandwidth is increased significantly and also with a size reduction in comparison to the patch antenna with L-probe. In the second configuration, the antenna is combined with parasitic loops and this allows one to increase further the bandwidth and improve the impedance matching within the entire operating bandwidth.