Design of SIW based Frequency Reconfigurable Antenna for K/Ku band applications

A frequency reconfigurable antenna based on substrate integrated waveguide (SIW) technology is proposed in this paper for K/Ku band applications. In most of the previous reconfigurable structures terminal SIW was used but here in this proposed structure, terminal as well as the blind vias is being implanted to achieve maximum reconfigurability and better efficiency of the miniature antenna. The antenna parameters are analysed thoroughly without diode as well as with diode. According to the measurements, the suggested antenna has an impedance bandwidth of 12 to 12.8 GHz in off condition and in addition to this from 22 to 22.8 GHz in ON condition with a peak gain of 7.5 dB. The radiation efficiency of proposed work is 90%.