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Journal articles
Dual-Layer Ridged Waveguide Slot Array Fed by a Butler Matrix With Sidelobe Control in the 60-GHz Band
Abstract : A novel multibeam antenna based on a 4 × 4 Butler matrix with sidelobe level (SLL) control is proposed in the 60-GHz band. The SLL is controlled using a dedicated circuit composed by four 90-degree couplers with different coupling factors and several cross couplers. This dual-layer antenna is made by hollow waveguides and is assembled using diffusion bonding technique. The radiating part is a compact array of ridged waveguides designed to avoid appearance of grating lobes in the visible range for large scanning angles. The antenna field of view is ±43° with sidelobes lower than -17.5 dB over the entire scanning range. The isolation between the input ports of the Butler matrix is better than 25 dB at the design frequency of 61.5 GHz. The reflection bandwidth for VSWR \textless; 2 is larger than 6.5%. At the design frequency, the measured conductor losses of the antenna are estimated lower than 0.64 dB for all ports
Keywords :
multibeam antenna
millimetre wave antenna arrays
millimetre wave couplers
coupling factors
Couplings
cross coupler
diffusion bonding
diffusion bonding technique
Directional couplers
dual layer antenna
dual layer ridged waveguide slot array
frequency 60 GHz
frequency 61.5 GHz
hollow waveguide
matrix algebra
millimeter-wave antenna
conductor loss estimation
Butler matrix
Butler matrices
Arrays
multibeam antennas
multifrequency antennas
Ports (Computers)
ridged waveguide
scanning angle
sidelobe level control
SLL
slot antenna arrays
slot array
waveguide couplers
https://hal-univ-rennes1.archives-ouvertes.fr/hal-01240771
Contributor : Laurent Jonchère <>
Submitted on : Wednesday, December 9, 2015 - 3:15:03 PM
Last modification on : Monday, October 5, 2020 - 9:50:23 AM
Contributor : Laurent Jonchère <>
Submitted on : Wednesday, December 9, 2015 - 3:15:03 PM
Last modification on : Monday, October 5, 2020 - 9:50:23 AM