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By N. Diodato

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This chapter is organized as follows. Section 2 will provide review of mobile satellite communications systems in particular its design parameters. An example of a link budget for a mobile satellite application is given. Section 3 describes designing issues on vehicle antennas for mobile satellite system from their mechanical and electrical requirements, and also their tracking functions. In this section, we also describe our proposed antenna system, especially aimed at ETS-VIII applications. Section 4 will focus on the planar antenna design for compactness and integrated construction.

Typical gains are shown in Table 3 according to their application at L band satellite communications. 4mφ) Voice/high speed data Aircraft (Inmarsat-Aero) -23 to -18 Phased array Array (2-4 elements) Helical, patch Land mobile Quadrifilar, Low speed data (message) Drooping- Ship (Inmarsat-C) dipole Aircraft Patch Land mobile 4–8 directional Typical 20–24 directional Omni Typical antenna (dimension) 0–4 -27 to -23 Ship (Inmarsat-M) Table 3. , 1998 & Ilcev, 2005) The beams of mobile antennas are required to cover the upper hemisphere independent of mobile motions.

2009), On DVB Satellite Network Integration in IMS, IWSSC, Sienna, Italy. O. Alphand, and al, (2005), QoS Architecture over DVB-RCS satellite networks in a NGN framework, Globecom, St Louis, United States. fr 32 Satellite Communications Antenna System for Land Mobile Satellite Communications 33 X2 Antenna System for Land Mobile Satellite Communications Basari, Kazuyuki Saito, Masaharu Takahashi and Koichi Ito Chiba University Japan 1. Introduction Personal wireless communications is a true success story and has become part of people’s everyday lives around the world.

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