Suspended plate antenna with circular polarization and configurable sense of rotation

Authors

DOI:

https://doi.org/10.17981/ingecuc.16.1.2020.011

Keywords:

L shape probe feeding technique, circular polarization, configurable sense of rotation, suspended patch antenna

Abstract

Introduction: Circular polarization antennas (CPA) are able to reduce the “Faraday rotation” effect due to the ionosphere, which causes a significant power losses compared to the case of using linear polarization antennas (LPA) [1]-[2]. Therefore, these antennas are widely used for space telemetry applications of satellites, space probes and ballistic missiles among others [2]. Furthermore, suspended plate antennas (SPA) offer the possibility to obtain largest levels of maximum gain and impedance bandwidth compared to those obtained with conventional technologies. Likewise, it is useful to be able to select the most appropriate sense of rotation, depending on the propagation conditions in the up/down links.  Objective: To design a CPA with configurable sense of rotation for small satellite applications, using SPA technology, such that it has gain and bandwidth levels higher than those obtained with conventional technologies.

Method: The antenna design is based on models proposed in the literature, through which an initial geometry consisting of a suspended patch with an L-shaped feeder and a hybrid coupler is designed. Subsequently, geometry optimization by parametric analysis is carried out with appropriate electromagnetic simulators. 

Results:  The proposed design has an impedance bandwidth of 34.39% and a maximum gain of 8.75 dBi at a frequency of 2.35GHz.

Conclusions: The L-shaped feeder technique for suspended patches improves the behavior of the antenna in axial ratio, impedance and maximal gain.

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Published

2020-01-28

How to Cite

Suárez Fajardo, C. A., Ariza Pulido, J. J., Mejía Serrano, S. E., & Puerto Leguizamón, G. A. (2020). Suspended plate antenna with circular polarization and configurable sense of rotation. INGE CUC, 16(1), 156–170. https://doi.org/10.17981/ingecuc.16.1.2020.011

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Vol. 16 No. 1 (2020): (January - June)

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In Press

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