3D Printed Artificial Anisotropic Antenna Substrates
3D Printed Artificial Anisotropic Antenna Substrates
- Author(s): A. Christodoulides ; K. Mitchell ; A. Feresidis
- DOI: 10.1049/cp.2019.0725
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- Author(s): A. Christodoulides ; K. Mitchell ; A. Feresidis Source: Antennas and Propagation Conference 2019 (APC-2019), 2019 page ()
- Conference: Antennas and Propagation Conference 2019 (APC-2019)
- DOI: 10.1049/cp.2019.0725
- ISBN: 978-1-83953-170-5
- Location: Birmingham, UK
- Conference date: 11-12 Nov. 2019
- Format: PDF
In this paper, a design of a linear-to-circular polarization converter based on a 3D printed artificial periodic and anisotropic substrate (AAAS) is presented. The AAAS is a stack of thin sheets of PLA material with air gaps in between placed over a ground plane. The alternation of relative permittivity enables the conversion of a linearly polarised (LP) incident wave to a circular polarised (CP) reflected wave. A unit cell approach with periodic boundary conditions is employed for the design of the structure in full wave simulation software. Results demonstrate that the proposed 3D printed AAAS provides good angular stability. In fact, the simulated relative 3dB axial ratio bandwidth always remains above 67% for incidence angles within ±45°. Using the AAAS as a substrate, a CP antenna application is proposed operating within the Ku-band reducing the complexity of designing/feeding and fabricating of the primary antenna, which is particularly important for higher frequencies.
Inspec keywords: microstrip antennas; electromagnetic wave polarisation; frequency selective surfaces; microwave antennas; antenna feeds
Subjects: Microwave materials and structures; Single antennas; Antenna accessories
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