Córdoba-Erazo, María F.

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Characterization of cavity-backed folded slot antennas
(2009) Córdoba-Erazo, María F.; Rodríguez-Solís, Rafael A.; College of Engineering; Colom-Ustariz, José; Ierkic-Vidmar, Henrick-Mario; Department of Electrical and Computer Engineering; Sharma, Anand
In this thesis, two Cavity-Backed Folded-Slot Antennas (CBFSA’s) are characterized through the Design Of Experiments technique (DOE) to study the influence that the Folded-Slot Antennas (FSA) and cavity dimensions of each CBFSA have on the following responses: resistance, frequency, reflection coefficient and gain in the substrate and cavity side. The antennas characterized were: the CPW-capacitively fed CBFSA and the CPW-inductively fed CBFSA. Two 2k factorial DOE’s are pro- posed for performing the characterization of each antenna. The designs proposed in the DOE’s are simulated in the High Frequency Structure Simulator (HFSS) and the results obtained were statistically analyzed. Linear regression models for each response of the CBFSA’s are presented. Some CBFSA designs were fabricated in order to validate the simulations. The CPW-inductively fed CBFSA achieves gain of 4.28 dB and reflection coefficient < 0.33 or VSWR < 2 at 4.5 GHz, whereas the CPW-capacitively fed CBFSA achieves gain of 4.63 dB and reflection coefficient < 0.33 or VSWR < 2 at 4.5 GHz. The radiation patterns of the antennas are uni-directional and Front-to-Back-Ratio (FBR) about 15 dB is obtained.