Wideband slot and printed antennas

Novel designs of printed and slot antenna elements that support wideband applications for radar and wireless communication systems are presented in this paper. The common feature of these antenna elements is the dipole type shape while the feeding line is based on coplanar waveguide (CPW) or a microstrip line with a balun for phase correction. The two arms of the antennas may be placed on the same side of the substrate or on the opposite sides of the substrate with truncated ground plane. Several shapes of the antenna element are considered. Among these are the bow-tie, modified bow-tie, and lotus. Design procedure for the slot bow-tie antenna with a tuning stub is developed and verified for various frequency bands. In addition to presenting new antenna designs for wideband applications, multiple band-reconfigurable printed and slot antennas are also designed and experimental verifications at X-band are demonstrated for ideal switching configurations