Compact size K-band UWB antenna for surface movement radar: Design and analysis

In this paper design a low profile, compact size, ultra wide band antenna characteristics were studied and modified I shape patch antenna is presented for surface movement radar (SMR). The proposed antenna radiation size is 9.25×6mm with low permittivity value 2.22, loss tangent value 0.004 and 0.4mm thickness duroid 5880 dielectric substrate material were used. The electric field distributions of this proposed antenna exposed that most of the element area is used for radiation at both resonances and fed by 50Ω coaxial feeding techniques. The parametric study is performed with different dielectric substrate material to achieve the K-band UWB frequency. The Proposed antenna impedance bandwidth (VSWR<;2) is achieved with wide band characteristics 1 GHz (19.8-20.8GHz) on the lower K-band frequency and 1.8 GHz (25.6-27.2GHz) on the upper K-band frequency. An extensive analysis of the return loss, radiation pattern and efficiency of the proposed antenna is discussed in this paper. This paper to studied and compare the results for both resonance using Ansoft high frequency structure simulator (HFSS). The Omni directional radiation pattern format and with radiation efficiency of 96.6% observed on the entire band, which makes it suitable for being used in the K band antenna for Surface Movement Radar (SMR) application.