A Lightweight, Wideband, Dual-Circular-Polarized Waveguide Cavity Array Designed With Direct Metal Laser Sintering Considerations

A lightweight, wideband, and dual-circular-polarized (CP) waveguide cavity array operating at Ku-band is proposed. To obtain dual-orthogonal linear polarizations (LPs), the basic radiating element is a square cavity fed by two waveguides. By properly tuning the feed networks, equal amplitude and pha...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2018-02, Vol.66 (2), p.675-682
Main Authors: Zhou, Shi-Gang, Huang, Guan-Long, Chio, Tan-Huat
Format: Article
Language:English
Subjects:
Broadband
Cavity resonators
Couplers
Dual-circular polarization
Laser sintering
Lightweight
Microstrip antenna arrays
Phased arrays
Rapid prototyping
waveguide cavity array and polarization tracking
Weight reduction
Wideband
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Summary:A lightweight, wideband, and dual-circular-polarized (CP) waveguide cavity array operating at Ku-band is proposed. To obtain dual-orthogonal linear polarizations (LPs), the basic radiating element is a square cavity fed by two waveguides. By properly tuning the feed networks, equal amplitude and phase of radiated electric field for two orthogonal polarizations can be obtained, culminating in a 16 \times 16 dual-LP array. A wideband waveguide-based hybrid coupler is integrated with a dual-LP array to achieve the final dual-CP array. The proposed dual-CP array is fabricated by applying the direct metal laser sintering method. Its overall size is 288 mm \times288 mm \times52 mm, and it has weighted slightly less than 1.3 kg. The measured results show that for both the CP ports, the array has exhibited desirable bandwidth of 12.25-14.5 GHz (at VSWR
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2017.2751644