Simple Switched-Beam Array Antenna System for Mobile Satellite Communications

BASARI  M. Fauzan E. PURNOMO  Kazuyuki SAITO  Masaharu TAKAHASHI  Koichi ITO  

IEICE TRANSACTIONS on Communications   Vol.E92-B   No.12   pp.3861-3868
Publication Date: 2009/12/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E92.B.3861
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Antennas and Propagation
antenna system,  ETS-VIII,  satellite-tracking,  microstrip patch array antenna,  outdoor measurement,  

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This paper presents a simple antenna system for land vehicle communication aimed at Engineering Test Satellite-VIII (ETS-VIII) applications. The developed antenna system which designed for mounting in a vehicle is compact, light weight and offers simple satellite-tracking operation. This system uses a microstrip patch array antenna, which includes onboard-power divider and switching circuit for antenna feeding control, due to its low profile. A Global Positioning System (GPS) receiver is constructed to provide accurate information on the vehicle's position and bearing during traveling. The personal computer (PC) interfaces as the control unit and data acquisition, which were specifically designed for this application, allow the switching circuit control as well as the retrieving of the received power levels. In this research, the antenna system was firstly examined in an anechoic chamber for S parameter, axial ratio, and radiation characteristics. Satisfactory characteristics were obtained. As for beam-tracking of antenna, it was examined in the anechoic chamber with the gain above 5 dBic and the axial ratio below 3 dB. Moreover, good received power levels for tracking the ETS-VIII satellite in outdoor measurement, were confirmed.