Abstract:

In this study, a new inset fed rectangular patch antenna structure operating at X and Ku bands is proposed. Conversion from a conventional microstrip patch antenna operating in a single band to a multi-frequency antenna operating in X band and Ku band is explained with the design processes on it. The proposed structure is designed on RT5880 with a dielectric constant of 2.2 and FR4 with a dielectric constant of 4.3. So it is achieved to demonstrate the validity of the design in different materials. For the FR4 material, in addition to a bandwidth increase of 183 MHz in the 8 GHz band, additional resonances are induced in the higher frequency regions. For the RT5880 material, it is found that only additional resonances are excited in the 8 GHz band, but it is concluded that it has showed a more stable operation in terms of antenna gain for the whole frequency region. The new antenna model which is designed with the FR4 dielectric has resonances at 8.52 GHz, 11.42 GHz and 13.44 GHz frequencies and the antenna with the RT5880 dielectric has resonances only within the X range at 8.51 GHz, 10.53 GHz and 11.57 GHz. In addition, antenna gains for these operating frequencies are 7.16 dBi at 8.52 GHz, 3.70 dBi at 11.42 GHz and 7.09 dBi at 13.44 GHz for the FR4 dielectric; for the RT5880 dielectric, it is found to be 8.07 dBi at 8.51 GHz, 7.55 dBi at 10.53 GHz, and 7.38 dBi at 11.57 GHz.

Keywords: