Original scientific paper
https://doi.org/10.7305/automatika.53-1.143
Plate-laminated Waveguide Slot Array Antennas and its Polarization Conversion Layers
Jiro Hirokawa
; Department of Electrical and Electronic Engineering, Tokyo Institute of Technology, S-20, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8552, Japan
Abstract
This paper reviews not only the characteristic of the linearly-polarized plate-laminated waveguide slot array antenna in the 60 GHz band but also conversion to circular or tilted linear polarization by adding a layer of apertures over the antenna. The linearly-polarized antenna achieves about 80% antenna efficiency and more than 32 dBi of gain is achieved over 4.8 GHz bandwidth. The measured cross-polarization level is well suppressed below −45 dB in the boresite even though the slots are wide. The circularly-polarized 16×16-element array antenna achieves the axial ratio less than 3 dB over 2.5 GHz bandwidth. In the tilted linearly polarized 16 × 16-element array antenna, the measured cross polarization is below −30 dB in the boreside over approximately 5 GHz bandwidth.
Keywords
Plate-laminated-waveguide; Corporate-feed; Polarization; Diffusion bonding; Millimeter-wave
Hrčak ID:
81295
URI
Publication date:
18.4.2012.
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