New determination of resonant frequency of circular disc microstrip antenna: application to thick substrate

Generalized neural method to determine resonant frequencies of various microstrip antennas

“…To calculate the resonant frequencies by using the single neural model, the equivalent patch dimensions for the circular and triangular MSAs are obtained by equating the patch areas of the circular and triangular MSAs to that of an equivalent rectangular microstrip antenna. It was shown in this study that the resonant frequency results calculated by using a single neural model are in very good agreement with the experimental results available in the literature [9,11,16,20,21,24,27,31,34,43,44] for the rectangular, circular and triangular MSAs.…”

“…The good agreement between the measured values and our computed resonant frequency values supports the validity of the single neural model proposed in this article. The results of the methods [14,26,27,32,36,41] for the circular MSAs are better than those of the single neural model. It should be noted that the methods [14,26,27,32,36,41] are only valid for the circular MSAs.…”

“…The training and test data sets used in this paper have been obtained from the previous experimental works [9,11,16,20,21,24,27,31,34,43,44], and are given in Tables I-III for Tables I-III of which 54 data sets were used for training the network, and the remaining 14 data sets were used for testing. The equivalent values of W and L for the circular and triangular MSAs were calculated by using eqs.…”

Concurrent Neuro-Fuzzy Systems for Resonant Frequency Computation of Rectangular, Circular, and Triangular Microstrip Antennas

“…Single neural models were proposed in [61,62] for simultaneously calculating the resonant frequencies of the rectangular, circular, and triangular MSAs. The results of single neural models [61,62] are not in very good agreement with the experimental results available in the literature [4,5,8,12,13,16,19,22,23,30,31]. For this reason, a hybrid method [63] based on a combination of ANN with ANFIS has been presented to improve the performance of single ANN models.…”

“…The selection of a data generator depends on the application and the availability of the data generator. The training and test data sets used in this paper have been obtained from the previous experimental works published by 11 sources [4,5,8,12,13,16,19,22,23,30,31], and are given in Tables 1, 2, and 3 for the rectangular, circular, and triangular MSAs, respectively. Total 68 data sets are listed in Tables 1-3.…”