Bull's-Eye Antenna With Circular Polarization at Millimeter Waves Based on Ridge Gap Waveguide Technology

In this communication, a Bull's-Eye (BE) antenna with circular polarization (CP) based on ridge gap waveguide (RGW) technology is numerically and experimentally demonstrated. The structure is excited from the bottom with a standard WR-15 waveguide ( V -band) coupled through a step transition to...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2021-04, Vol.69 (4), p.2376-2379
Main Authors: Perez-Quintana, Dayan, Ederra, Inigo, Beruete, Miguel
Format: Article
Language:English
Subjects:
Bull’s-Eye (BE) antenna
Circular polarization
circular polarization (CP)
Diamond
Diamonds
Gain
Millimeter waves
Polarization
ridge gap waveguide (RGW) technology
Slot antennas
Waveguide discontinuities
Waveguides
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Summary:In this communication, a Bull's-Eye (BE) antenna with circular polarization (CP) based on ridge gap waveguide (RGW) technology is numerically and experimentally demonstrated. The structure is excited from the bottom with a standard WR-15 waveguide ( V -band) coupled through a step transition to a ridgeline that ends in two orthogonal arms of different lengths to generate CP. Radiation is coupled to the top plate by a central diamond slot surrounded by the BE structure, which consists of four concentric periodic corrugations around the slot. Simulations and experimental results are in good agreement, with axial ratio below 1 dB at the operation frequency and peak gain of 18.4 dB. The antenna has right-handed CP (RHCP) with polarization discrimination of more than 30 dB.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2020.3019565