Abstract

We have been researching and developing the STICS (Satellite / Terrestrial Integrated Mobile Communication System). For this system, a large satellite antenna technology is very important and we have been studying the antenna with approximately 30m aperture size. This antenna consists of the deployable reflector and the phased array feed and performs the multi beam formation. Number of array elements and beams are about 100 respectively. But the high accuracy of beam control, as pointing, beam shape and side lobe level, will be required because the beam width is very narrow as about 200km at S band. Digital beam former and digital channelizer (DBF/DC) was developed for this system. DBF/DC has excellent flexibility for beam shaping function. In this paper, we summarize study, discussion and experiment of large reflector antenna for STICS, and describe technical issue of this antenna.

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