author = "Souza, Eduardo Amorim Martins de and Oliveira, Phelipe S. and 
                         D'Assun{\c{c}}{\~a}o, Adaildo G. and Mendon{\c{c}}a, 
                         La{\'e}rcio M. and Peixeiro, Cust{\'o}dio",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and 
                         {Universidade Federal do Rio Grande do Norte (UFRN)} and 
                         {Universidade Federal do Rio Grande do Norte (UFRN)} and 
                         {Universidade Federal do Rio Grande do Norte (UFRN)} and 
                         {Universidade de Lisboa}",
                title = "Miniaturization of a microstrip patch antenna with a koch fractal 
                         contour using a social spider algorithm to optimize shorting post 
                         position and inset feeding",
              journal = "International Journal of Antennas and Propagation",
                 year = "2019",
               volume = "2019",
                pages = "e628430",
             abstract = "This paper presents a social spider optimization (SSO) design of a 
                         small-size microstrip antenna. Two antenna miniaturization 
                         techniques, based on the use of a Koch fractal contour and a 
                         shorting post (connecting the patch to the ground plane), are 
                         combined to enable a major size reduction. The antenna is inset 
                         fed by a microstrip line. The developed SSO algorithm is used to 
                         find out the best radius and position of the shorting post and the 
                         length of the inset feed, to achieve the desired resonant 
                         frequency with good impedance matching. Antenna prototypes have 
                         been fabricated and measured. The good agreement obtained between 
                         numerical simulation and experimental results has validated the 
                         design procedure. Compared with a conventional rectangular patch, 
                         the antenna resonance frequency is reduced from 2.45GHz to 730MHz, 
                         which corresponds to a remarkable miniaturization of about 70%. 
                         The proposed antenna is suitable for applications in the 
                         700-800MHz frequency range, such as 4G mobile communication 
                  doi = "10.1155/2019/6284830",
                  url = "http://dx.doi.org/10.1155/2019/6284830",
                 issn = "1687-5869",
             language = "en",
           targetfile = "6284830.pdf",
        urlaccessdate = "13 abr. 2021"