Two layer reconfigurable coaxial‐fed antenna for S‐band and GPS applications

In this paper, a new design is introduced for variable‐slot antennas. The proposed antenna structure is based on the slots placed in the edges of the patch and in the center of the patch. Then, using pin diodes this structure is converted into a variable antenna. It is worth noting that in this paper short‐circuit and open‐circuit structures are used instead of pin diodes. The two‐band or multi‐band structures studied in this paper are suitable for covering 1.82/2.71/2.82, 1.56/1.81/2.29/2.85, GPS, S, and GSM frequency bands.