Abstract
ABSTRACT A wideband conformal microstrip patch antenna suitable for airborne applications is proposed. Dumbbell shaped slots located symmetrically at suitable fraction of wavelength distance from the centre of the patch and a partially cut ground plane is utilised to enhance the operating bandwidth of the patch antenna as compared to the standard conventional patch. Fractional impedance bandwidth (S11<-10 dB) of about 86% with operating range 1.14 GHz to 2.87 GHz for the proposed planar and 81% bandwidth within frequency range 1.16 GHz to 2.74 GHz for the cylindrical antenna configuration (covering S and L bands) is obtained. The antenna shows satisfactory gain in both E and H planes within the operating frequency range. The radius of curvature has been taken electrically small (1.25λ) to clearly illustrate the effect of curvature on the performance characteristics of the antenna.
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