Abstract

In this paper, slotted waveguide fed microstrip antenna array has been designed at Ka-band. It comprises of the slotted waveguide having I-shaped slots to feed the microstrip antenna array. This type of feeding technique has an advantage that it reduces the losses from the microstrip feed network and improves the power handling capacity. Each linear microstrip antenna array has 13 elements and is placed on top I-shaped slot on the waveguide. It gives a bandwidth (S11 ≤ 10dB) from 35.90–36.18 GHz and gain of 28dB. It gives side lobe level of 17dB. Such an antenna can be used in high power millimeter wave applications.

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