학술논문
Wide-Angle Beam Steering Closed-Form Pillbox Antenna Fed by Substrate-Integrated Waveguide Horn for On-the-Move Satellite Communications.
Document Type
Article
Source
Subject
*SUBSTRATE integrated waveguides
*ANTENNA feeds
*BEAM steering
*TELECOMMUNICATION satellites
*PARABOLIC reflectors
*LOW earth orbit satellites
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Language
ISSN
1424-8220
Abstract
Wide-angle mechanical beam steering for on-the-move satellite communications is presented in this paper based on a closed-form pillbox antenna system. It includes three main parts: a fixed-feed part, which is a substrate-integrated waveguide (SIW) horn with an extended aperture attached to a parabolic reflector; a novel quasi-optical system, which is a single coupling slot alongside and without spacing from the parabolic reflector; and a radiating disc, which is a leaky-wave metallic pattern. To make the antenna compact, pillbox-based feeding is implemented underneath the metallic patterns. The antenna is designed based on a substrate-guided grounded concept using leaky-wave metallic patterns operating at 20 G H z . Beam scanning is achieved using mechanical rotation of the leaky-wave metallic patterns. The proposed antenna has an overall size of 340 × 335 × 2 mm3, a gain of 23.2 d B i , wide beam scanning range of 120 ° , from − 60 ° to + 60 ° in the azimuthal plane, and a low side lobe level of − 17.8 d B at a maximum scan angle of 60 ° . The proposed antenna terminal is suitable for next-generation ubiquitous connectivity for households and small businesses in remote areas, ships, unmanned aerial vehicles, and disaster management. [ABSTRACT FROM AUTHOR]