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International Journal of Antennas and Propagation
Volume 2018, Article ID 1893650, 13 pages
https://doi.org/10.1155/2018/1893650
Research Article

Analytical Model for Predesigning Probe-Fed Hybrid Microstrip Antennas

1Laboratório de Antenas e Propagação (LAP), Instituto Tecnológico de Aeronáutica (ITA), Praça Mal. Eduardo Gomes 50, 12228-900 São José dos Campos, SP, Brazil
2Departamento de Eléctrica y Electrónica (DEE), Centro de Investigaciones Científicas y Tecnológicas del Ejército (CICTE), Universidad de las Fuerzas Armadas (ESPE), Av. General Rumiñahui s/n, Sangolquí, Ecuador
3Divisão de Processamento de Imagem (DPI), Instituto Nacional de Pesquisas Espaciais (INPE), Av. Dos Astronautas 1758, 12227-010 São José dos Campos, SP, Brazil

Correspondence should be addressed to Alexis F. Tinoco Salazar; ce.ude.epse@oconitfa

Received 13 September 2017; Accepted 5 December 2017; Published 28 February 2018

Academic Editor: Miguel Ferrando Bataller

Copyright © 2018 Nilson R. Rabelo et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Based on the equivalent resonant cavity model, an effective analysis methodology of probe-fed hybrid microstrip antennas is carried out in this paper, resulting in a better understanding of the parameter interrelations affecting their behavior. With that, a new design criterion focused on establishing uniform radiation patterns with balanced 3 dB angles is proposed and implemented. Results obtained with the proposed model closely matched HFSS simulations. Measurements made on a prototype antenna, manufactured with substrate integrated waveguide (SIW) technology, also showed excellent agreement, thus validating the use of the cavity model for predesigning hybrid microstrip antennas in a simple, visible, and time- and cost-effective way.