Analysis of phased array antenna system via spherical harmonics decomposition. Issue 18 (1st November 2019)

• Record Type: Journal Article
• Authors: Famoriji, Oluwole John; Akingbade, Kayode; Ogunti, Erastus; Apena, Waliu; Fadamiro, Akinwale; Lin, Fujiang
• Is Part Of: IET communications. Volume 13:Issue 18(2019)
• Page Start: 3097
• Page End: 3104
• Publication Date: 2019-11-01
• Subjects: signal sampling -- antenna phased arrays -- array signal processing -- satellite antennas -- statistical analysis; spherical harmonics decomposition -- hemispherical scan coverage -- satellite imagery data -- high bit rates -- reliability analysis -- theoretical performance evaluation framework -- spherical harmonics expansion approach -- antenna element number -- phased‐array antenna elements positioning -- spherical phased‐array antenna systems -- systematic performance evaluation framework -- spatial sampling mechanisms; Telecommunication systems -- Periodicals; Speech processing systems -- Periodicals; 621.38205
• DOI: 10.1049/iet-com.2018.5460
• Languages: English
• ISSNs: 1751-8628

Abstract

Abstract : Spherical phased‐array antenna has hemispherical scan coverage for transmission of satellite imagery data at high bit rates to the ground station. Different conditions have been assigned based on their effects on the overall performance of the communication link. Reliability analysis consequently becomes an important requirement of any system onboard a satellite. Although the phased array and some connected algorithms have been presented in the literatures; however, there is no extensive systematic and theoretical performance evaluation framework formulated. In this work, the authors present new method that efficiently and effectively analyses the statistical performance of phased‐array antenna systems using spherical harmonics expansion approach. Specifically, the errors caused by limited antenna element number, measurement noise of antenna, imprecision in phased‐array antenna elements positioning, and spatial aliasing are systematically and theoretically benchmarked via simulations. Spatial sampling mechanisms for the positioning of array antenna elements on a sphere are presented and evaluated. This study proposed design guide and analysis for spherical phased‐array antenna systems, and antenna arrays that do not employ spherical harmonics explicitly.