S-Band Non-uniformly distributed Slotted waveguide linear & planar array antenna with enhanced sidelobe level (Travelling wave type)

Document Type : Original Article

Authors

1 Military technical college, Egypt.

2 Military Technical College, Egypt.

10.21608/iugrc.2021.246352

Abstract

This paper describes the design and development of non-uniform slotted waveguide linear and planar array (SWA) antenna in s-band. Linear array produces fan beam narrow in azimuth and wide in elevation, while planar array produces narrow beam in both azimuth and elevation. Conventional SWA antenna offers high sidelobe level, which can be enhanced, theoretically down to (-40) dB, using chebyshev distribution technique which redistribute the slots around the center of one column by transforming the weights of Chebyshev numbers into dimensions by using certain equations.
We discuss the concept to achieve low sidelobe level of SWA antennas, design, development, and characterization of edge fed slotted waveguide linear array antenna in s-band, and high efficiency broadband slotted waveguide array. The developed SWA antennas are characterized and their measured results are presented. The developed prototype of proposed SWA antenna demonstrates measured sidelobe level better than -28 dB over. Planar array SWA is also introduced producing narrow beam

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