Abstract
A 2 × 1 array of rectangular microstrip antenna (RMA) with fully shorted non-radiating edges mounted on two different types of mostly available and popular substrates namely RT-Duroid, and FR4 have been proposed for simultaneous improvement of co-polarization gain and polarization purity. The mutual coupling effects between the two radiating elements have also been studied by varying the gap between the radiating patch and documented in this paper. The simulated studies have been carried out using the high-frequency structure simulator (v. 14). The array structure with FR4 substrate provides a co-polarization gain of 5.3 dBi and polarization purity of 29.77 dB when the gap between two radiating patches is λ/4. On the other hand, the array structure with RT-Duroid substrate provides a co-polarization gain of 5.3 dBi and polarization purity of 29.77 dB when the gap between two radiating patches is λ/4. Both the results are quite good as compared to the conventional rectangular patch antenna. Both the proposed structure also show good impedance matching and stable radiation pattern with in the operational frequency range.KeywordsRectangular microstrip antennaAntenna arrayCo-polarization gainPolarization purityShorted non-radiating edges
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