Design and full-wave analysis of supershaped patch antennas

The rapid development of wireless communication systems and the subsequent burst of wireless devices place several demands on the antenna designs. In particular, the development of high-performance radio systems require the adoption of broadband antennas featuring low profile, high gain, embedded installation and reduced manufacturing costs. Printed antennas, despite their inherent limitations can meet most of these requirements by employing innovative design solutions aiming at improving their electromagnetic performance. In this respect, a novel class of supershaped patch antennas is introduced and thoroughly investigated. The geometry of the proposed radiating structures is described by the polar equation known in the scientific literature as superformula or Gielis equation. Such equation can generate a large variety of different nature-inspired and abstract shapes which translates into the possibility of automatically reshaping the geometry of the radiating patch through the tuning of its parameters and consequently modifying the circuital performance and the radiation properties. In this context, the commercially available CST Studio Suite, based on the Finite Integration Technique (FIT), is used to perform the numerically based time domain full-wave analysis of the supershaped patch antennas. These simulations help to the deduction of useful conclusions upon the characteristics of general supershaped patch antennas as a function of the pertinent Gielis parameters. Moreover, a new developed semi-analytical method is used in order to obtain a meaningful physical insight to the operation of these antennas. At the end, we explore the possibilities of building novel high-performance antenna structures based on the supershape formula that are intended for modern applications. This investigation led in the conception of two dual-band supershaped patch antenna configurations designed for the WLAN IEEE 802.11a/b/g/n standards. The proposed planar designs are not only low-cost and simple to manufacture but also exhibit a plethora of attractive characteristics such as exact mathematical shaping definition, multi-band/wideband operation, very low cross-polarization levels, high radiation efficiency, frequency control capability, etc.

Subject

patch antennas
wireless LAN antennas
supershape formula
antenna design

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http://resolver.tudelft.nl/uuid:1ee56cc7-1885-4f65-8c32-1bc876cce227

Embargo date

2013-11-22

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Student theses

Document type

master thesis

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MSc_thesis_V.Paraforou.pdf

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