Abstract
An integrated monopulse antenna is proposed based on the substrate integrated waveguide (SIW) slot array antenna together with a microstrip hybrid-ring coupler and power dividers. The whole antenna and feeding system are fabricated on a single substrate, which gives the advantage of small size, low profile, low cost, etc. The design process and experimental results of a four-by-eight substrate integrated monopulse antenna at X-band are presented.

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