Abstract
The low profile nature of a microstrip patch array is advantageous in stealth applications. However, the feed network of a typical corporate-fed patch array contributes considerably toward antenna scattering. A proximity coupled feeding technique can be adopted to overcome this problem. Since the feed network comes beneath the substrate, the radar cross-section (RCS) of the whole array can be reduced to an extent, with an added advantage of providing wider bandwidth. However, the multiple resonances that will be generated from proximity coupled arrays may contribute to higher RCS at corresponding frequencies. Incorporating slots in the ground plane helps in changing the path of surface current, thereby reducing the RCS peaks due to resonant modes. Further, results show that cutting slots in the ground plane of a proximity coupled patch array has aided in gain and bandwidth enhancement. A proximity coupled patch array with high impedance surface (HIS) layer and reduced slotted ground plane is proposed towards wideband structural RCS reduction from 11 to 30 GHz.
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Singh, A., Sasidharan, D.K., Singh, H. (2020). EM Design of Low RCS Proximity Coupled Patch Array. In: Fong, S., Dey, N., Joshi, A. (eds) ICT Analysis and Applications. Lecture Notes in Networks and Systems, vol 93. Springer, Singapore. https://doi.org/10.1007/978-981-15-0630-7_3
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DOI: https://doi.org/10.1007/978-981-15-0630-7_3
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