Circularly Polarized Horns Based on Standard Horns and a Metasurface Polarizer

A method for designing circularly polarized (CP) horn antenna is proposed, which is based on a standard pyramidal horn with a linear-to-circular polarization transformer. A compact transparent metasurface transformer is first designed to perform linear-to-circular polarization transformation, and th...

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Bibliographic Details
Published in:IEEE antennas and wireless propagation letters 2018-03, Vol.17 (3), p.480-484
Main Authors: Lin, Chengxiu, Ge, Yuehe, Bird, Trevor S., Liu, Kaiting
Format: Article
Language:English
Subjects:
Antenna radiation patterns
Bandwidth
Circularly polarized (CP) horns
Gain
Horn antennas
metasurface
polarizer
pyramidal horn
Reflector antennas
Satellite antennas
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Summary:A method for designing circularly polarized (CP) horn antenna is proposed, which is based on a standard pyramidal horn with a linear-to-circular polarization transformer. A compact transparent metasurface transformer is first designed to perform linear-to-circular polarization transformation, and then this is inserted in a linearly polarized standard pyramidal horn to create a CP horn. To validate the CP horn design, both simulations and experiments were conducted and good agreement was obtained. The CP performance achieved a 3 dB axial-ratio bandwidth of 7.4%, a maximum gain reduction of 1.1 dB without altering the horn's original size for a light increase in weight and at a small cost increase.
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2018.2796641