Three-Dimensional Architecture of Substrate Integrated Waveguide Feeder for Fermi Tapered Slot Antenna Array Applications

A class of three-dimensional planar arrays in substrate integrated waveguide (SIW) technology is proposed, designed and demonstrated with 8 × 16 elements at 35 GHz for millimeter-wave imaging radar system applications. Endfire element is generally chosen to ensure initial high gain and broadband cha...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2012-10, Vol.60 (10), p.4610-4618
Main Authors: El Khatib, Bassel Youzkatli, Djerafi, T., Ke Wu
Format: Article
Language:English
Subjects:
Antenna arrays
Antenna measurements
Antenna radiation patterns
Antennas
Applied sciences
Architecture
Arrays
E-plane corner
Exact sciences and technology
Feeders
Gain
Power dividers
Radiocommunications
Radiolocalization and radionavigation
sidelobe level (SLL)
Slot antennas
substrate integrated waveguide (SIW)
Substrates
tapered slot antenna (TSA)
Telecommunications
Telecommunications and information theory
Three dimensional
Waveguides
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Summary:A class of three-dimensional planar arrays in substrate integrated waveguide (SIW) technology is proposed, designed and demonstrated with 8 × 16 elements at 35 GHz for millimeter-wave imaging radar system applications. Endfire element is generally chosen to ensure initial high gain and broadband characteristics for the array. Fermi-TSA (tapered slot antenna) structure is used as element to reduce the beamwidth. Corrugation is introduced to reduce the resulting antenna physical width without degradation of performance. The achieved measured gain in our demonstration is about 18.4 dBi. A taper shaped air gap in the center is created to reduce the coupling between two adjacent elements. An SIW H-to-E-plane vertical interconnect is proposed in this three-dimensional architecture and optimized to connect eight 1 × 16 planar array sheets to the 1 × 8 final network. The overall architecture is exclusively fabricated by the conventional PCB process. Thus, the developed SIW feeder leads to a significant reduction in both weight and cost, compared to the metallic waveguide-based counterpart. A complete antenna structure is designed and fabricated. The planar array ensures a gain of 27 dBi with low SLL of 26 dB and beamwidth as narrow as 5.15 degrees in the E-plane and 6.20 degrees in the 45°-plane.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2012.2207323