The design of a new dual band slot antenna for Substrate Integrated Waveguide (SIW) technology is presented. The antenna element operates in two bands suitable for emerging High Throughput Satellite Systems terminals; namely the K band(19.2-20.2GHz) and the Ka Band (29-30 GHz). The inclined slotted antenna elements are first designed separately for each band and then in conjunction. These slot antenna pairs can be subsequently utilized for the formation of circularly polarized interleaved antenna arrays. Simulated axial ratio and impedance bandwidth cover the required bandwidths of 1GHz in each band.
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