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International Journal of Antennas and Propagation
Volume 2017, Article ID 4825179, 8 pages
https://doi.org/10.1155/2017/4825179
Research Article

A Microstrip Second-Iteration Square Koch Dipole Antenna for TT&C Downlink Applications in Small Satellites

1CONACYT, Centro de Investigación y Desarrollo en Telecomunicaciones Espaciales, Universidad Autónoma de Zacatecas, Ramón López Velarde 801, Zacatecas, ZAC, Mexico
2Coordinación General de Investigación Científica, Universidad de Colima, Gonzalo de Sandoval 444, Colima, COL, Mexico
3Facultad de Ingeniería Mecánica y Eléctrica, Universidad de Colima, Carr. Colima-Coquimatlan Km 8.5, Coquimatlán, COL, Mexico
4Centro de Investigación y Desarrollo en Telecomunicaciones Espaciales, Universidad Autónoma de Zacatecas, Ramón López Velarde 801, Zacatecas, ZAC, Mexico

Correspondence should be addressed to Jorge Simón; moc.liamg@rnomisj

Received 16 November 2016; Revised 29 January 2017; Accepted 13 February 2017; Published 9 March 2017

Academic Editor: Herve Aubert

Copyright © 2017 Jorge Simón 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

A microstrip second-iteration square Koch dipole fractal antenna is presented. This meandered antenna has a total length of 56.56 cm including its feed gap and was printed on the diagonal of a 100 mm × 100 mm PCB card that acts as CubeSat face. The antenna that was designed to optimize space shows acceptable performance at its resonance frequency of 455 MHz within the 70-centimeter band, a band that is commonly used for TTC CubeSat subsystems. The designed fractal antenna shows a reflection coefficient below −20 dB, a VSWR below 1.2, a −10 dB bandwidth of 50 MHz, and impedance magnitude of 56 , while the average maximum gain around its resonance frequency is 2.14 dBi. All these parameters make this designed antenna suitable for small satellite applications at a band where a linear λ/2 dipolar antenna working at 455 MHz would be about 32.97 cm long, which does not fit within the largest dimension of a CubeSat face corresponding to 14.14 cm.