access icon free Radial line slot array antenna with vertical waveguide feed for F-band communication

The authors present concentrically arrayed radial line slot array antenna for operation at 106 GHz. For compact design, they propose a vertical waveguide feeding with a cross-slot structure at the waveguide to cavity transition. Aperture design and optimisation are carried out using particle swarm optimisation with the goal to minimise the cross-polarised radiation. Antenna prototypes were fabricated using a slotted plate with nickel and radial line cavity with copper. Fabricated aperture showed 72% peak radiation efficiency at 106.3 GHz with a gain bandwidth of 8.5% and 3-dB axial ratio bandwidth of 18%.

Inspec keywords: antenna feeds; slot antenna arrays; millimetre wave antenna arrays; particle swarm optimisation; antenna radiation patterns; aperture antennas

Other keywords: particle swarm optimisation; radial line cavity; cross-slot structure; fabricated aperture; vertical waveguide feed; radial line slot array antenna; cavity transition; frequency 106 GHz; aperture design; cross-polarised radiation; slotted plate; F-band communication

Subjects: Optimisation techniques; Antenna arrays

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