Abstract:
Satellites communications play very important role in global communication nowadays.
Applications for communications can be found in several bands, including the L-, X-, Ku-, and
Ka-bands. To track satellites Mechanical beam steering is used in conventional agile systems that
are commercially available to monitor the satellite. However, these devices are large, expensive
to maintain, and have inaccurate mechanical placement. In contrast, Phased array antennas have
agile beams, providing significant system advantages and they can track one or more satellites.
An important parameter for optimal functioning of satellite-based communication system is the
design of its antenna. To meet these requirements aggressive research is underway for low-cost
solutions of phased array with larger scanning area. This thesis work also presents substrate
integrated waveguide phased array at (14.0-14.5) GHz Ku band for satellite applications., SIW is
advantageous for low loss and wide bandwidth due to its high Q-factor, high selectivity, cutoff
frequency characteristic, and high-power capacity. The suggested antenna array is built on a
single-layer substrate that has a metal ground completely covering it on the back. The SIW
operates in the TE10 mode like a rectangular waveguide filled with dielectric. A 4x8 planar
phased array uses the SIW-slot element. It can scan up to ± 35⸰ in the whole operating band with
maximum measured gain if 19.2dBi and minimum SLL of -10dB.
