Low profile superstrate using Transformation Optics for semicircular radiation pattern of antenna

Abstract :

In this article, a dielectric superstrate inspired from transformation optics is presented. When placed over a patch antenna, this superstrate increases the half power beam width (HPBW) of a classical patch antenna. An appropriate spatial transformation relation with spatial compression and refractive index shift factors has been used to derive an expression for a dielectric material profile. The wave front exiting from the transformed space is optimized for a semicylindrical shape. Then, a discretized version of this profile has been used to design a cuboidal superstrate. Full wave simulations have been presented that essentially show a superstrate device capable of producing a 297° of HPBW in H-plane with a peak directivity of 3.2 dBi at the design frequency. The derived solution can be realized using the standard dielectric materials for real-world applications.

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Journal articles
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https://hal.telecom-paristech.fr/hal-02287466
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Submitted on : Friday, September 13, 2019 - 4:59:22 PM
Last modification on : Thursday, October 17, 2019 - 12:37:01 PM

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Chetan Joshi, A. C. Lepage, Xavier Begaud. Low profile superstrate using Transformation Optics for semicircular radiation pattern of antenna. Applied Physics A, 2017, 123 (2), ⟨10.1007/s00339-017-0787-7⟩. ⟨hal-02287466⟩

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